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https://github.com/samba-team/samba.git
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017c90e1ba
Our code won’t use this, but NIST’s test vectors are based on handing a fixed buffer to the key derivation function. View with ‘git show -b’. Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
7035 lines
166 KiB
C
7035 lines
166 KiB
C
/*
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Unix SMB/CIFS implementation.
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Infrastructure for async SMB client requests
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Copyright (C) Volker Lendecke 2008
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Copyright (C) Stefan Metzmacher 2011
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/network.h"
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#include "../lib/async_req/async_sock.h"
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#include "../lib/util/tevent_ntstatus.h"
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#include "../lib/util/tevent_unix.h"
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#include "lib/util/util_net.h"
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#include "lib/util/dlinklist.h"
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#include "lib/util/iov_buf.h"
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#include "../libcli/smb/smb_common.h"
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#include "../libcli/smb/smb_seal.h"
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#include "../libcli/smb/smb_signing.h"
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#include "../libcli/smb/read_smb.h"
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#include "smbXcli_base.h"
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#include "librpc/ndr/libndr.h"
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#include "libcli/smb/smb2_negotiate_context.h"
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#include "libcli/smb/smb2_signing.h"
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#include "lib/crypto/gnutls_helpers.h"
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#include <gnutls/gnutls.h>
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#include <gnutls/crypto.h>
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struct smbXcli_conn;
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struct smbXcli_req;
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struct smbXcli_session;
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struct smbXcli_tcon;
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struct smbXcli_conn {
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int sock_fd;
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struct sockaddr_storage local_ss;
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struct sockaddr_storage remote_ss;
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const char *remote_name;
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struct tevent_queue *outgoing;
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struct tevent_req **pending;
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struct tevent_req *read_smb_req;
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struct tevent_req *suicide_req;
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enum protocol_types min_protocol;
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enum protocol_types max_protocol;
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enum protocol_types protocol;
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bool allow_signing;
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bool desire_signing;
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bool mandatory_signing;
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/*
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* The incoming dispatch function should return:
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* - NT_STATUS_RETRY, if more incoming PDUs are expected.
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* - NT_STATUS_OK, if no more processing is desired, e.g.
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* the dispatch function called
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* tevent_req_done().
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* - All other return values disconnect the connection.
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*/
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NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
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TALLOC_CTX *tmp_mem,
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uint8_t *inbuf);
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struct {
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struct {
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uint32_t capabilities;
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uint32_t max_xmit;
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} client;
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struct {
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uint32_t capabilities;
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uint32_t max_xmit;
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uint16_t max_mux;
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uint16_t security_mode;
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bool readbraw;
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bool writebraw;
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bool lockread;
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bool writeunlock;
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uint32_t session_key;
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struct GUID guid;
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DATA_BLOB gss_blob;
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uint8_t challenge[8];
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const char *workgroup;
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const char *name;
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int time_zone;
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NTTIME system_time;
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} server;
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uint32_t capabilities;
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uint32_t max_xmit;
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uint16_t mid;
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struct smb1_signing_state *signing;
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struct smb_trans_enc_state *trans_enc;
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struct tevent_req *read_braw_req;
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} smb1;
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struct {
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struct {
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uint32_t capabilities;
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uint16_t security_mode;
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struct GUID guid;
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struct smb311_capabilities smb3_capabilities;
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} client;
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struct {
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uint32_t capabilities;
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uint16_t security_mode;
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struct GUID guid;
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uint32_t max_trans_size;
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uint32_t max_read_size;
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uint32_t max_write_size;
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NTTIME system_time;
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NTTIME start_time;
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DATA_BLOB gss_blob;
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uint16_t sign_algo;
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uint16_t cipher;
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bool smb311_posix;
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} server;
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uint64_t mid;
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uint16_t cur_credits;
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uint16_t max_credits;
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uint32_t cc_chunk_len;
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uint32_t cc_max_chunks;
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uint8_t io_priority;
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bool force_channel_sequence;
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uint8_t preauth_sha512[64];
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} smb2;
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struct smbXcli_session *sessions;
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};
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struct smb2cli_session {
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uint64_t session_id;
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uint16_t session_flags;
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struct smb2_signing_key *application_key;
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struct smb2_signing_key *signing_key;
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bool should_sign;
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bool should_encrypt;
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struct smb2_signing_key *encryption_key;
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struct smb2_signing_key *decryption_key;
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uint64_t nonce_high_random;
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uint64_t nonce_high_max;
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uint64_t nonce_high;
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uint64_t nonce_low;
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uint16_t channel_sequence;
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bool replay_active;
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bool require_signed_response;
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};
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struct smbXcli_session {
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struct smbXcli_session *prev, *next;
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struct smbXcli_conn *conn;
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struct {
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uint16_t session_id;
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uint16_t action;
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DATA_BLOB application_key;
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bool protected_key;
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} smb1;
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struct smb2cli_session *smb2;
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struct {
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struct smb2_signing_key *signing_key;
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uint8_t preauth_sha512[64];
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} smb2_channel;
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/*
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* this should be a short term hack
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* until the upper layers have implemented
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* re-authentication.
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*/
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bool disconnect_expired;
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};
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struct smbXcli_tcon {
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bool is_smb1;
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uint32_t fs_attributes;
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struct {
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uint16_t tcon_id;
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uint16_t optional_support;
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uint32_t maximal_access;
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uint32_t guest_maximal_access;
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char *service;
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char *fs_type;
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} smb1;
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struct {
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uint32_t tcon_id;
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uint8_t type;
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uint32_t flags;
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uint32_t capabilities;
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uint32_t maximal_access;
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bool should_sign;
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bool should_encrypt;
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} smb2;
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};
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struct smbXcli_req_state {
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struct tevent_context *ev;
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struct smbXcli_conn *conn;
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struct smbXcli_session *session; /* maybe NULL */
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struct smbXcli_tcon *tcon; /* maybe NULL */
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uint8_t length_hdr[4];
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bool one_way;
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uint8_t *inbuf;
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struct tevent_req *write_req;
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struct timeval endtime;
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struct {
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/* Space for the header including the wct */
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uint8_t hdr[HDR_VWV];
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/*
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* For normal requests, smb1cli_req_send chooses a mid.
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* SecondaryV trans requests need to use the mid of the primary
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* request, so we need a place to store it.
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* Assume it is set if != 0.
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*/
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uint16_t mid;
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uint16_t *vwv;
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uint8_t bytecount_buf[2];
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#define MAX_SMB_IOV 10
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/* length_hdr, hdr, words, byte_count, buffers */
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struct iovec iov[1 + 3 + MAX_SMB_IOV];
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int iov_count;
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bool one_way_seqnum;
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uint32_t seqnum;
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struct tevent_req **chained_requests;
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uint8_t recv_cmd;
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NTSTATUS recv_status;
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/* always an array of 3 talloc elements */
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struct iovec *recv_iov;
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} smb1;
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struct {
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const uint8_t *fixed;
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uint16_t fixed_len;
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const uint8_t *dyn;
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uint32_t dyn_len;
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uint8_t transform[SMB2_TF_HDR_SIZE];
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uint8_t hdr[SMB2_HDR_BODY];
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uint8_t pad[7]; /* padding space for compounding */
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/*
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* always an array of 3 talloc elements
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* (without a SMB2_TRANSFORM header!)
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*
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* HDR, BODY, DYN
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*/
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struct iovec *recv_iov;
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/*
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* the expected max for the response dyn_len
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*/
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uint32_t max_dyn_len;
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uint16_t credit_charge;
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bool should_sign;
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bool should_encrypt;
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uint64_t encryption_session_id;
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bool signing_skipped;
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bool require_signed_response;
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bool notify_async;
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bool got_async;
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uint16_t cancel_flags;
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uint64_t cancel_mid;
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uint64_t cancel_aid;
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} smb2;
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};
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static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
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{
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/*
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* NT_STATUS_OK, means we do not notify the callers
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*/
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smbXcli_conn_disconnect(conn, NT_STATUS_OK);
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while (conn->sessions) {
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conn->sessions->conn = NULL;
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DLIST_REMOVE(conn->sessions, conn->sessions);
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}
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if (conn->smb1.trans_enc) {
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TALLOC_FREE(conn->smb1.trans_enc);
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}
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return 0;
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}
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struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
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int fd,
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const char *remote_name,
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enum smb_signing_setting signing_state,
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uint32_t smb1_capabilities,
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struct GUID *client_guid,
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uint32_t smb2_capabilities,
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const struct smb311_capabilities *smb3_capabilities)
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{
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struct smbXcli_conn *conn = NULL;
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void *ss = NULL;
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struct sockaddr *sa = NULL;
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socklen_t sa_length;
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int ret;
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if (smb3_capabilities != NULL) {
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const struct smb3_signing_capabilities *sign_algos =
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&smb3_capabilities->signing;
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const struct smb3_encryption_capabilities *ciphers =
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&smb3_capabilities->encryption;
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SMB_ASSERT(sign_algos->num_algos <= SMB3_SIGNING_CAPABILITIES_MAX_ALGOS);
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SMB_ASSERT(ciphers->num_algos <= SMB3_ENCRYTION_CAPABILITIES_MAX_ALGOS);
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}
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conn = talloc_zero(mem_ctx, struct smbXcli_conn);
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if (!conn) {
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return NULL;
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}
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ret = set_blocking(fd, false);
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if (ret < 0) {
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goto error;
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}
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conn->sock_fd = fd;
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conn->remote_name = talloc_strdup(conn, remote_name);
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if (conn->remote_name == NULL) {
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goto error;
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}
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ss = (void *)&conn->local_ss;
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sa = (struct sockaddr *)ss;
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sa_length = sizeof(conn->local_ss);
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ret = getsockname(fd, sa, &sa_length);
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if (ret == -1) {
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goto error;
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}
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ss = (void *)&conn->remote_ss;
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sa = (struct sockaddr *)ss;
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sa_length = sizeof(conn->remote_ss);
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ret = getpeername(fd, sa, &sa_length);
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if (ret == -1) {
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goto error;
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}
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conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
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if (conn->outgoing == NULL) {
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goto error;
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}
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conn->pending = NULL;
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conn->min_protocol = PROTOCOL_NONE;
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conn->max_protocol = PROTOCOL_NONE;
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conn->protocol = PROTOCOL_NONE;
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switch (signing_state) {
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case SMB_SIGNING_OFF:
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/* never */
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conn->allow_signing = false;
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conn->desire_signing = false;
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conn->mandatory_signing = false;
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break;
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case SMB_SIGNING_DEFAULT:
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case SMB_SIGNING_IF_REQUIRED:
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/* if the server requires it */
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conn->allow_signing = true;
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conn->desire_signing = false;
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conn->mandatory_signing = false;
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break;
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case SMB_SIGNING_DESIRED:
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/* if the server desires it */
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conn->allow_signing = true;
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conn->desire_signing = true;
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conn->mandatory_signing = false;
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break;
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case SMB_SIGNING_IPC_DEFAULT:
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case SMB_SIGNING_REQUIRED:
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/* always */
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conn->allow_signing = true;
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conn->desire_signing = true;
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conn->mandatory_signing = true;
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break;
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}
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conn->smb1.client.capabilities = smb1_capabilities;
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conn->smb1.client.max_xmit = UINT16_MAX;
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|
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conn->smb1.capabilities = conn->smb1.client.capabilities;
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conn->smb1.max_xmit = 1024;
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|
|
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conn->smb1.mid = 1;
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|
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/* initialise signing */
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conn->smb1.signing = smb1_signing_init(conn,
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conn->allow_signing,
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conn->desire_signing,
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conn->mandatory_signing);
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if (!conn->smb1.signing) {
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goto error;
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}
|
|
|
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conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
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if (conn->mandatory_signing) {
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conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
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}
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if (client_guid) {
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conn->smb2.client.guid = *client_guid;
|
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}
|
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conn->smb2.client.capabilities = smb2_capabilities;
|
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if (smb3_capabilities != NULL) {
|
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conn->smb2.client.smb3_capabilities = *smb3_capabilities;
|
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}
|
|
|
|
conn->smb2.cur_credits = 1;
|
|
conn->smb2.max_credits = 0;
|
|
conn->smb2.io_priority = 1;
|
|
|
|
/*
|
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* Samba and Windows servers accept a maximum of 16 MiB with a maximum
|
|
* chunk length of 1 MiB.
|
|
*/
|
|
conn->smb2.cc_chunk_len = 1024 * 1024;
|
|
conn->smb2.cc_max_chunks = 16;
|
|
|
|
talloc_set_destructor(conn, smbXcli_conn_destructor);
|
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return conn;
|
|
|
|
error:
|
|
TALLOC_FREE(conn);
|
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return NULL;
|
|
}
|
|
|
|
bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (conn->sock_fd == -1) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->protocol;
|
|
}
|
|
|
|
bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return true;
|
|
}
|
|
|
|
if (conn->smb1.capabilities & CAP_UNICODE) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool smbXcli_conn_signing_mandatory(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->mandatory_signing;
|
|
}
|
|
|
|
bool smbXcli_conn_have_posix(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB3_11) {
|
|
return conn->smb2.server.smb311_posix;
|
|
}
|
|
if (conn->protocol <= PROTOCOL_NT1) {
|
|
return (conn->smb1.capabilities & CAP_UNIX);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* [MS-SMB] 2.2.2.3.5 - SMB1 support for passing through
|
|
* query/set commands to the file system
|
|
*/
|
|
bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return true;
|
|
}
|
|
|
|
if (conn->smb1.capabilities & CAP_W2K_SMBS) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
|
|
{
|
|
set_socket_options(conn->sock_fd, options);
|
|
}
|
|
|
|
const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
|
|
{
|
|
return &conn->local_ss;
|
|
}
|
|
|
|
const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
|
|
{
|
|
return &conn->remote_ss;
|
|
}
|
|
|
|
const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->remote_name;
|
|
}
|
|
|
|
uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
/*
|
|
* TODO...
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
return conn->smb1.server.max_mux;
|
|
}
|
|
|
|
NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return conn->smb2.server.system_time;
|
|
}
|
|
|
|
return conn->smb1.server.system_time;
|
|
}
|
|
|
|
const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return &conn->smb2.server.gss_blob;
|
|
}
|
|
|
|
return &conn->smb1.server.gss_blob;
|
|
}
|
|
|
|
const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return &conn->smb2.server.guid;
|
|
}
|
|
|
|
return &conn->smb1.server.guid;
|
|
}
|
|
|
|
bool smbXcli_conn_get_force_channel_sequence(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.force_channel_sequence;
|
|
}
|
|
|
|
void smbXcli_conn_set_force_channel_sequence(struct smbXcli_conn *conn,
|
|
bool v)
|
|
{
|
|
conn->smb2.force_channel_sequence = v;
|
|
}
|
|
|
|
struct smbXcli_conn_samba_suicide_state {
|
|
struct smbXcli_conn *conn;
|
|
struct iovec iov;
|
|
uint8_t buf[9];
|
|
struct tevent_req *write_req;
|
|
};
|
|
|
|
static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
|
|
enum tevent_req_state req_state);
|
|
static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
|
|
|
|
struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint8_t exitcode)
|
|
{
|
|
struct tevent_req *req, *subreq;
|
|
struct smbXcli_conn_samba_suicide_state *state;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smbXcli_conn_samba_suicide_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
state->conn = conn;
|
|
SIVAL(state->buf, 4, SMB_SUICIDE_PACKET);
|
|
SCVAL(state->buf, 8, exitcode);
|
|
_smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
|
|
|
|
if (conn->suicide_req != NULL) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
state->iov.iov_base = state->buf;
|
|
state->iov.iov_len = sizeof(state->buf);
|
|
|
|
subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
|
|
false, &state->iov, 1);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
|
|
state->write_req = subreq;
|
|
|
|
tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
|
|
|
|
/*
|
|
* We need to use tevent_req_defer_callback()
|
|
* in order to allow smbXcli_conn_disconnect()
|
|
* to do a safe cleanup.
|
|
*/
|
|
tevent_req_defer_callback(req, ev);
|
|
conn->suicide_req = req;
|
|
|
|
return req;
|
|
}
|
|
|
|
static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
|
|
enum tevent_req_state req_state)
|
|
{
|
|
struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
|
|
req, struct smbXcli_conn_samba_suicide_state);
|
|
|
|
TALLOC_FREE(state->write_req);
|
|
|
|
if (state->conn == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (state->conn->suicide_req == req) {
|
|
state->conn->suicide_req = NULL;
|
|
}
|
|
state->conn = NULL;
|
|
}
|
|
|
|
static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req = tevent_req_callback_data(
|
|
subreq, struct tevent_req);
|
|
struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
|
|
req, struct smbXcli_conn_samba_suicide_state);
|
|
ssize_t nwritten;
|
|
int err;
|
|
|
|
state->write_req = NULL;
|
|
|
|
nwritten = writev_recv(subreq, &err);
|
|
TALLOC_FREE(subreq);
|
|
if (nwritten == -1) {
|
|
/* here, we need to notify all pending requests */
|
|
NTSTATUS status = map_nt_error_from_unix_common(err);
|
|
smbXcli_conn_disconnect(state->conn, status);
|
|
return;
|
|
}
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
|
|
{
|
|
return tevent_req_simple_recv_ntstatus(req);
|
|
}
|
|
|
|
NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
|
|
uint8_t exitcode)
|
|
{
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
struct tevent_context *ev;
|
|
struct tevent_req *req;
|
|
NTSTATUS status = NT_STATUS_NO_MEMORY;
|
|
bool ok;
|
|
|
|
if (smbXcli_conn_has_async_calls(conn)) {
|
|
/*
|
|
* Can't use sync call while an async call is in flight
|
|
*/
|
|
status = NT_STATUS_INVALID_PARAMETER_MIX;
|
|
goto fail;
|
|
}
|
|
ev = samba_tevent_context_init(frame);
|
|
if (ev == NULL) {
|
|
goto fail;
|
|
}
|
|
req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
|
|
if (req == NULL) {
|
|
goto fail;
|
|
}
|
|
ok = tevent_req_poll_ntstatus(req, ev, &status);
|
|
if (!ok) {
|
|
goto fail;
|
|
}
|
|
status = smbXcli_conn_samba_suicide_recv(req);
|
|
fail:
|
|
TALLOC_FREE(frame);
|
|
return status;
|
|
}
|
|
|
|
uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.capabilities;
|
|
}
|
|
|
|
uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.max_xmit;
|
|
}
|
|
|
|
bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
|
|
{
|
|
size_t pending = talloc_array_length(conn->pending);
|
|
uint16_t possible = conn->smb1.server.max_mux;
|
|
|
|
if (pending >= possible) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.session_key;
|
|
}
|
|
|
|
const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.challenge;
|
|
}
|
|
|
|
uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.security_mode;
|
|
}
|
|
|
|
bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.readbraw;
|
|
}
|
|
|
|
bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.writebraw;
|
|
}
|
|
|
|
bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.lockread;
|
|
}
|
|
|
|
bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.writeunlock;
|
|
}
|
|
|
|
int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb1.server.time_zone;
|
|
}
|
|
|
|
bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
|
|
const DATA_BLOB user_session_key,
|
|
const DATA_BLOB response)
|
|
{
|
|
return smb1_signing_activate(conn->smb1.signing,
|
|
user_session_key,
|
|
response);
|
|
}
|
|
|
|
bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
|
|
const uint8_t *buf, uint32_t seqnum)
|
|
{
|
|
const uint8_t *hdr = buf + NBT_HDR_SIZE;
|
|
size_t len = smb_len_nbt(buf);
|
|
|
|
return smb1_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
|
|
}
|
|
|
|
bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
|
|
{
|
|
return smb1_signing_is_active(conn->smb1.signing);
|
|
}
|
|
|
|
void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
|
|
struct smb_trans_enc_state *es)
|
|
{
|
|
/* Replace the old state, if any. */
|
|
if (conn->smb1.trans_enc) {
|
|
TALLOC_FREE(conn->smb1.trans_enc);
|
|
}
|
|
conn->smb1.trans_enc = es;
|
|
}
|
|
|
|
bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
|
|
{
|
|
return common_encryption_on(conn->smb1.trans_enc);
|
|
}
|
|
|
|
|
|
static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
|
|
{
|
|
uint32_t flags2 = SVAL(hdr, HDR_FLG2);
|
|
NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
|
|
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
|
|
return status;
|
|
}
|
|
|
|
return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
|
|
}
|
|
|
|
/**
|
|
* Is the SMB command able to hold an AND_X successor
|
|
* @param[in] cmd The SMB command in question
|
|
* @retval Can we add a chained request after "cmd"?
|
|
*/
|
|
bool smb1cli_is_andx_req(uint8_t cmd)
|
|
{
|
|
switch (cmd) {
|
|
case SMBtconX:
|
|
case SMBlockingX:
|
|
case SMBopenX:
|
|
case SMBreadX:
|
|
case SMBwriteX:
|
|
case SMBsesssetupX:
|
|
case SMBulogoffX:
|
|
case SMBntcreateX:
|
|
return true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
|
|
{
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
uint16_t result;
|
|
|
|
if (conn->protocol == PROTOCOL_NONE) {
|
|
/*
|
|
* This is what windows sends on the SMB1 Negprot request
|
|
* and some vendors reuse the SMB1 MID as SMB2 sequence number.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
while (true) {
|
|
size_t i;
|
|
|
|
result = conn->smb1.mid++;
|
|
if ((result == 0) || (result == 0xffff)) {
|
|
continue;
|
|
}
|
|
|
|
for (i=0; i<num_pending; i++) {
|
|
if (result == smb1cli_req_mid(conn->pending[i])) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == num_pending) {
|
|
return result;
|
|
}
|
|
}
|
|
}
|
|
|
|
static NTSTATUS smbXcli_req_cancel_write_req(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
ssize_t ret;
|
|
int err;
|
|
bool ok;
|
|
|
|
if (state->write_req == NULL) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*
|
|
* Check if it's possible to cancel the request.
|
|
* If the result is true it's not too late.
|
|
* See writev_cancel().
|
|
*/
|
|
ok = tevent_req_cancel(state->write_req);
|
|
if (ok) {
|
|
TALLOC_FREE(state->write_req);
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
/*
|
|
* SMB2 has a sane signing state.
|
|
*/
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (num_pending > 1) {
|
|
/*
|
|
* We have more pending requests following us. This
|
|
* means the signing state will be broken for them.
|
|
*
|
|
* As a solution we could add the requests directly to
|
|
* our outgoing queue and do the signing in the trigger
|
|
* function and then use writev_send() without passing a
|
|
* queue. That way we'll only sign packets we're most
|
|
* likely send to the wire.
|
|
*/
|
|
return NT_STATUS_REQUEST_OUT_OF_SEQUENCE;
|
|
}
|
|
|
|
/*
|
|
* If we're the only request that's
|
|
* pending, we're able to recover the signing
|
|
* state.
|
|
*/
|
|
smb1_signing_cancel_reply(conn->smb1.signing,
|
|
state->smb1.one_way_seqnum);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
ret = writev_recv(state->write_req, &err);
|
|
TALLOC_FREE(state->write_req);
|
|
if (ret == -1) {
|
|
return map_nt_error_from_unix_common(err);
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
void smbXcli_req_unset_pending(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
size_t i;
|
|
NTSTATUS cancel_status;
|
|
|
|
cancel_status = smbXcli_req_cancel_write_req(req);
|
|
|
|
if (state->smb1.mid != 0) {
|
|
/*
|
|
* This is a [nt]trans[2] request which waits
|
|
* for more than one reply.
|
|
*/
|
|
if (!NT_STATUS_IS_OK(cancel_status)) {
|
|
/*
|
|
* If the write_req cancel didn't work
|
|
* we can't use the connection anymore.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, cancel_status);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
tevent_req_set_cleanup_fn(req, NULL);
|
|
|
|
if (num_pending == 1) {
|
|
/*
|
|
* The pending read_smb tevent_req is a child of
|
|
* conn->pending. So if nothing is pending anymore, we need to
|
|
* delete the socket read fde.
|
|
*/
|
|
/* TODO: smbXcli_conn_cancel_read_req */
|
|
TALLOC_FREE(conn->pending);
|
|
conn->read_smb_req = NULL;
|
|
|
|
if (!NT_STATUS_IS_OK(cancel_status)) {
|
|
/*
|
|
* If the write_req cancel didn't work
|
|
* we can't use the connection anymore.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, cancel_status);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (i=0; i<num_pending; i++) {
|
|
if (req == conn->pending[i]) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == num_pending) {
|
|
/*
|
|
* Something's seriously broken. Just returning here is the
|
|
* right thing nevertheless, the point of this routine is to
|
|
* remove ourselves from conn->pending.
|
|
*/
|
|
|
|
if (!NT_STATUS_IS_OK(cancel_status)) {
|
|
/*
|
|
* If the write_req cancel didn't work
|
|
* we can't use the connection anymore.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, cancel_status);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Remove ourselves from the conn->pending array
|
|
*/
|
|
for (; i < (num_pending - 1); i++) {
|
|
conn->pending[i] = conn->pending[i+1];
|
|
}
|
|
|
|
/*
|
|
* No NULL check here, we're shrinking by sizeof(void *), and
|
|
* talloc_realloc just adjusts the size for this.
|
|
*/
|
|
conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
|
|
num_pending - 1);
|
|
|
|
if (!NT_STATUS_IS_OK(cancel_status)) {
|
|
/*
|
|
* If the write_req cancel didn't work
|
|
* we can't use the connection anymore.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, cancel_status);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void smbXcli_req_cleanup(struct tevent_req *req,
|
|
enum tevent_req_state req_state)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
NTSTATUS cancel_status;
|
|
|
|
switch (req_state) {
|
|
case TEVENT_REQ_RECEIVED:
|
|
/*
|
|
* Make sure we really remove it from
|
|
* the pending array on destruction.
|
|
*
|
|
* smbXcli_req_unset_pending() calls
|
|
* smbXcli_req_cancel_write_req() internal
|
|
*/
|
|
state->smb1.mid = 0;
|
|
smbXcli_req_unset_pending(req);
|
|
return;
|
|
default:
|
|
cancel_status = smbXcli_req_cancel_write_req(req);
|
|
if (!NT_STATUS_IS_OK(cancel_status)) {
|
|
/*
|
|
* If the write_req cancel didn't work
|
|
* we can't use the connection anymore.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, cancel_status);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
static bool smb1cli_req_cancel(struct tevent_req *req);
|
|
static bool smb2cli_req_cancel(struct tevent_req *req);
|
|
|
|
static bool smbXcli_req_cancel(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
if (!smbXcli_conn_is_connected(state->conn)) {
|
|
return false;
|
|
}
|
|
|
|
if (state->conn->protocol == PROTOCOL_NONE) {
|
|
return false;
|
|
}
|
|
|
|
if (state->conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return smb2cli_req_cancel(req);
|
|
}
|
|
|
|
return smb1cli_req_cancel(req);
|
|
}
|
|
|
|
static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
|
|
|
|
bool smbXcli_req_set_pending(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_conn *conn;
|
|
struct tevent_req **pending;
|
|
size_t num_pending;
|
|
|
|
conn = state->conn;
|
|
|
|
if (!smbXcli_conn_is_connected(conn)) {
|
|
return false;
|
|
}
|
|
|
|
num_pending = talloc_array_length(conn->pending);
|
|
|
|
pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
|
|
num_pending+1);
|
|
if (pending == NULL) {
|
|
return false;
|
|
}
|
|
pending[num_pending] = req;
|
|
conn->pending = pending;
|
|
tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
|
|
tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
|
|
|
|
if (!smbXcli_conn_receive_next(conn)) {
|
|
/*
|
|
* the caller should notify the current request
|
|
*
|
|
* And all other pending requests get notified
|
|
* by smbXcli_conn_disconnect().
|
|
*/
|
|
smbXcli_req_unset_pending(req);
|
|
smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void smbXcli_conn_received(struct tevent_req *subreq);
|
|
|
|
static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
|
|
{
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state;
|
|
|
|
if (conn->read_smb_req != NULL) {
|
|
return true;
|
|
}
|
|
|
|
if (num_pending == 0) {
|
|
if (conn->smb2.mid < UINT64_MAX) {
|
|
/* no more pending requests, so we are done for now */
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* If there are no more SMB2 requests possible,
|
|
* because we are out of message ids,
|
|
* we need to disconnect.
|
|
*/
|
|
smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
|
|
return true;
|
|
}
|
|
|
|
req = conn->pending[0];
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
/*
|
|
* We're the first ones, add the read_smb request that waits for the
|
|
* answer from the server
|
|
*/
|
|
conn->read_smb_req = read_smb_send(conn->pending,
|
|
state->ev,
|
|
conn->sock_fd);
|
|
if (conn->read_smb_req == NULL) {
|
|
return false;
|
|
}
|
|
tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
|
|
return true;
|
|
}
|
|
|
|
void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
|
|
{
|
|
struct smbXcli_session *session;
|
|
int sock_fd = conn->sock_fd;
|
|
|
|
tevent_queue_stop(conn->outgoing);
|
|
|
|
conn->sock_fd = -1;
|
|
|
|
session = conn->sessions;
|
|
if (talloc_array_length(conn->pending) == 0) {
|
|
/*
|
|
* if we do not have pending requests
|
|
* there is no need to update the channel_sequence
|
|
*/
|
|
session = NULL;
|
|
}
|
|
for (; session; session = session->next) {
|
|
smb2cli_session_increment_channel_sequence(session);
|
|
}
|
|
|
|
if (conn->suicide_req != NULL) {
|
|
/*
|
|
* smbXcli_conn_samba_suicide_send()
|
|
* used tevent_req_defer_callback() already.
|
|
*/
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
tevent_req_nterror(conn->suicide_req, status);
|
|
}
|
|
conn->suicide_req = NULL;
|
|
}
|
|
|
|
/*
|
|
* Cancel all pending requests. We do not do a for-loop walking
|
|
* conn->pending because that array changes in
|
|
* smbXcli_req_unset_pending.
|
|
*/
|
|
while (conn->pending != NULL &&
|
|
talloc_array_length(conn->pending) > 0) {
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state;
|
|
struct tevent_req **chain;
|
|
size_t num_chained;
|
|
size_t i;
|
|
|
|
req = conn->pending[0];
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
if (state->smb1.chained_requests == NULL) {
|
|
bool in_progress;
|
|
|
|
/*
|
|
* We're dead. No point waiting for trans2
|
|
* replies.
|
|
*/
|
|
state->smb1.mid = 0;
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
/* do not notify the callers */
|
|
continue;
|
|
}
|
|
|
|
in_progress = tevent_req_is_in_progress(req);
|
|
if (!in_progress) {
|
|
/*
|
|
* already finished
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* we need to defer the callback, because we may notify
|
|
* more then one caller.
|
|
*/
|
|
tevent_req_defer_callback(req, state->ev);
|
|
tevent_req_nterror(req, status);
|
|
continue;
|
|
}
|
|
|
|
chain = talloc_move(conn, &state->smb1.chained_requests);
|
|
num_chained = talloc_array_length(chain);
|
|
|
|
for (i=0; i<num_chained; i++) {
|
|
bool in_progress;
|
|
|
|
req = chain[i];
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
/*
|
|
* We're dead. No point waiting for trans2
|
|
* replies.
|
|
*/
|
|
state->smb1.mid = 0;
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
/* do not notify the callers */
|
|
continue;
|
|
}
|
|
|
|
in_progress = tevent_req_is_in_progress(req);
|
|
if (!in_progress) {
|
|
/*
|
|
* already finished
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* we need to defer the callback, because we may notify
|
|
* more than one caller.
|
|
*/
|
|
tevent_req_defer_callback(req, state->ev);
|
|
tevent_req_nterror(req, status);
|
|
}
|
|
TALLOC_FREE(chain);
|
|
}
|
|
|
|
if (sock_fd != -1) {
|
|
close(sock_fd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Fetch a smb request's mid. Only valid after the request has been sent by
|
|
* smb1cli_req_send().
|
|
*/
|
|
uint16_t smb1cli_req_mid(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
if (state->smb1.mid != 0) {
|
|
return state->smb1.mid;
|
|
}
|
|
|
|
return SVAL(state->smb1.hdr, HDR_MID);
|
|
}
|
|
|
|
void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
state->smb1.mid = mid;
|
|
}
|
|
|
|
uint32_t smb1cli_req_seqnum(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
return state->smb1.seqnum;
|
|
}
|
|
|
|
void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
state->smb1.seqnum = seqnum;
|
|
}
|
|
|
|
static size_t smbXcli_iov_len(const struct iovec *iov, int count)
|
|
{
|
|
ssize_t ret = iov_buflen(iov, count);
|
|
|
|
/* Ignore the overflow case for now ... */
|
|
return ret;
|
|
}
|
|
|
|
static void smb1cli_req_flags(enum protocol_types protocol,
|
|
uint32_t smb1_capabilities,
|
|
uint8_t smb_command,
|
|
uint8_t additional_flags,
|
|
uint8_t clear_flags,
|
|
uint8_t *_flags,
|
|
uint16_t additional_flags2,
|
|
uint16_t clear_flags2,
|
|
uint16_t *_flags2)
|
|
{
|
|
uint8_t flags = 0;
|
|
uint16_t flags2 = 0;
|
|
|
|
if (protocol >= PROTOCOL_LANMAN1) {
|
|
flags |= FLAG_CASELESS_PATHNAMES;
|
|
flags |= FLAG_CANONICAL_PATHNAMES;
|
|
}
|
|
|
|
if (protocol >= PROTOCOL_LANMAN2) {
|
|
flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
|
|
flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
|
|
}
|
|
|
|
if (protocol >= PROTOCOL_NT1) {
|
|
flags2 |= FLAGS2_IS_LONG_NAME;
|
|
|
|
if (smb1_capabilities & CAP_UNICODE) {
|
|
flags2 |= FLAGS2_UNICODE_STRINGS;
|
|
}
|
|
if (smb1_capabilities & CAP_STATUS32) {
|
|
flags2 |= FLAGS2_32_BIT_ERROR_CODES;
|
|
}
|
|
if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
|
|
flags2 |= FLAGS2_EXTENDED_SECURITY;
|
|
}
|
|
}
|
|
|
|
flags |= additional_flags;
|
|
flags &= ~clear_flags;
|
|
flags2 |= additional_flags2;
|
|
flags2 &= ~clear_flags2;
|
|
|
|
*_flags = flags;
|
|
*_flags2 = flags2;
|
|
}
|
|
|
|
static void smb1cli_req_cancel_done(struct tevent_req *subreq);
|
|
|
|
static bool smb1cli_req_cancel(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
uint8_t flags;
|
|
uint16_t flags2;
|
|
uint32_t pid;
|
|
uint16_t mid;
|
|
struct tevent_req *subreq;
|
|
NTSTATUS status;
|
|
|
|
flags = CVAL(state->smb1.hdr, HDR_FLG);
|
|
flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
|
|
pid = SVAL(state->smb1.hdr, HDR_PID);
|
|
pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
|
|
mid = SVAL(state->smb1.hdr, HDR_MID);
|
|
|
|
subreq = smb1cli_req_create(state, state->ev,
|
|
state->conn,
|
|
SMBntcancel,
|
|
flags, 0,
|
|
flags2, 0,
|
|
0, /* timeout */
|
|
pid,
|
|
state->tcon,
|
|
state->session,
|
|
0, NULL, /* vwv */
|
|
0, NULL); /* bytes */
|
|
if (subreq == NULL) {
|
|
return false;
|
|
}
|
|
smb1cli_req_set_mid(subreq, mid);
|
|
|
|
status = smb1cli_req_chain_submit(&subreq, 1);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(subreq);
|
|
return false;
|
|
}
|
|
smb1cli_req_set_mid(subreq, 0);
|
|
|
|
tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void smb1cli_req_cancel_done(struct tevent_req *subreq)
|
|
{
|
|
/* we do not care about the result */
|
|
TALLOC_FREE(subreq);
|
|
}
|
|
|
|
struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint8_t smb_command,
|
|
uint8_t additional_flags,
|
|
uint8_t clear_flags,
|
|
uint16_t additional_flags2,
|
|
uint16_t clear_flags2,
|
|
uint32_t timeout_msec,
|
|
uint32_t pid,
|
|
struct smbXcli_tcon *tcon,
|
|
struct smbXcli_session *session,
|
|
uint8_t wct, uint16_t *vwv,
|
|
int iov_count,
|
|
struct iovec *bytes_iov)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state;
|
|
uint8_t flags = 0;
|
|
uint16_t flags2 = 0;
|
|
uint16_t uid = 0;
|
|
uint16_t tid = 0;
|
|
ssize_t num_bytes;
|
|
|
|
if (iov_count > MAX_SMB_IOV) {
|
|
/*
|
|
* Should not happen :-)
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smbXcli_req_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
state->ev = ev;
|
|
state->conn = conn;
|
|
state->session = session;
|
|
state->tcon = tcon;
|
|
|
|
if (session) {
|
|
uid = session->smb1.session_id;
|
|
}
|
|
|
|
if (tcon) {
|
|
tid = tcon->smb1.tcon_id;
|
|
|
|
if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
|
|
clear_flags |= FLAG_CASELESS_PATHNAMES;
|
|
} else {
|
|
/* Default setting, case insensitive. */
|
|
additional_flags |= FLAG_CASELESS_PATHNAMES;
|
|
}
|
|
|
|
if (smbXcli_conn_dfs_supported(conn) &&
|
|
smbXcli_tcon_is_dfs_share(tcon))
|
|
{
|
|
additional_flags2 |= FLAGS2_DFS_PATHNAMES;
|
|
}
|
|
}
|
|
|
|
state->smb1.recv_cmd = 0xFF;
|
|
state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
|
|
state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
|
|
if (state->smb1.recv_iov == NULL) {
|
|
TALLOC_FREE(req);
|
|
return NULL;
|
|
}
|
|
|
|
smb1cli_req_flags(conn->protocol,
|
|
conn->smb1.capabilities,
|
|
smb_command,
|
|
additional_flags,
|
|
clear_flags,
|
|
&flags,
|
|
additional_flags2,
|
|
clear_flags2,
|
|
&flags2);
|
|
|
|
SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
|
|
SCVAL(state->smb1.hdr, HDR_COM, smb_command);
|
|
SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
|
|
SCVAL(state->smb1.hdr, HDR_FLG, flags);
|
|
SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
|
|
SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
|
|
SSVAL(state->smb1.hdr, HDR_TID, tid);
|
|
SSVAL(state->smb1.hdr, HDR_PID, pid);
|
|
SSVAL(state->smb1.hdr, HDR_UID, uid);
|
|
SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
|
|
SCVAL(state->smb1.hdr, HDR_WCT, wct);
|
|
|
|
state->smb1.vwv = vwv;
|
|
|
|
num_bytes = iov_buflen(bytes_iov, iov_count);
|
|
if (num_bytes == -1) {
|
|
/*
|
|
* I'd love to add a check for num_bytes<=UINT16_MAX here, but
|
|
* the smbclient->samba connections can lie and transfer more.
|
|
*/
|
|
TALLOC_FREE(req);
|
|
return NULL;
|
|
}
|
|
|
|
SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
|
|
|
|
state->smb1.iov[0].iov_base = (void *)state->length_hdr;
|
|
state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
|
|
state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
|
|
state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
|
|
state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
|
|
state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
|
|
state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
|
|
state->smb1.iov[3].iov_len = sizeof(uint16_t);
|
|
|
|
if (iov_count != 0) {
|
|
memcpy(&state->smb1.iov[4], bytes_iov,
|
|
iov_count * sizeof(*bytes_iov));
|
|
}
|
|
state->smb1.iov_count = iov_count + 4;
|
|
|
|
if (timeout_msec > 0) {
|
|
state->endtime = timeval_current_ofs_msec(timeout_msec);
|
|
if (!tevent_req_set_endtime(req, ev, state->endtime)) {
|
|
return req;
|
|
}
|
|
}
|
|
|
|
switch (smb_command) {
|
|
case SMBtranss:
|
|
case SMBtranss2:
|
|
case SMBnttranss:
|
|
state->one_way = true;
|
|
break;
|
|
case SMBntcancel:
|
|
state->one_way = true;
|
|
state->smb1.one_way_seqnum = true;
|
|
break;
|
|
case SMBlockingX:
|
|
if ((wct == 8) &&
|
|
(CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
|
|
state->one_way = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return req;
|
|
}
|
|
|
|
static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
|
|
struct iovec *iov, int iov_count,
|
|
uint32_t *seqnum,
|
|
bool one_way_seqnum)
|
|
{
|
|
TALLOC_CTX *frame = NULL;
|
|
NTSTATUS status;
|
|
uint8_t *buf;
|
|
|
|
/*
|
|
* Obvious optimization: Make cli_calculate_sign_mac work with struct
|
|
* iovec directly. MD5Update would do that just fine.
|
|
*/
|
|
|
|
if (iov_count < 4) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[0].iov_len != NBT_HDR_SIZE) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[3].iov_len != sizeof(uint16_t)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
frame = talloc_stackframe();
|
|
|
|
buf = iov_concat(frame, &iov[1], iov_count - 1);
|
|
if (buf == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
*seqnum = smb1_signing_next_seqnum(conn->smb1.signing,
|
|
one_way_seqnum);
|
|
status = smb1_signing_sign_pdu(conn->smb1.signing,
|
|
buf,
|
|
talloc_get_size(buf),
|
|
*seqnum);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
memcpy(iov[1].iov_base, buf, iov[1].iov_len);
|
|
|
|
TALLOC_FREE(frame);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
static void smb1cli_req_writev_done(struct tevent_req *subreq);
|
|
static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *tmp_mem,
|
|
uint8_t *inbuf);
|
|
|
|
static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
|
|
struct smbXcli_req_state *state,
|
|
struct iovec *iov, int iov_count)
|
|
{
|
|
struct tevent_req *subreq;
|
|
NTSTATUS status;
|
|
uint8_t cmd;
|
|
uint16_t mid;
|
|
ssize_t nbtlen;
|
|
|
|
if (!smbXcli_conn_is_connected(state->conn)) {
|
|
return NT_STATUS_CONNECTION_DISCONNECTED;
|
|
}
|
|
|
|
if (state->conn->protocol > PROTOCOL_NT1) {
|
|
DBG_ERR("called for dialect[%s] server[%s]\n",
|
|
smb_protocol_types_string(state->conn->protocol),
|
|
smbXcli_conn_remote_name(state->conn));
|
|
return NT_STATUS_REVISION_MISMATCH;
|
|
}
|
|
|
|
if (iov_count < 4) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[0].iov_len != NBT_HDR_SIZE) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
if (iov[3].iov_len != sizeof(uint16_t)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
cmd = CVAL(iov[1].iov_base, HDR_COM);
|
|
if (cmd == SMBreadBraw) {
|
|
if (smbXcli_conn_has_async_calls(state->conn)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
state->conn->smb1.read_braw_req = req;
|
|
}
|
|
|
|
if (state->smb1.mid != 0) {
|
|
mid = state->smb1.mid;
|
|
} else {
|
|
mid = smb1cli_alloc_mid(state->conn);
|
|
}
|
|
SSVAL(iov[1].iov_base, HDR_MID, mid);
|
|
|
|
nbtlen = iov_buflen(&iov[1], iov_count-1);
|
|
if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
_smb_setlen_nbt(iov[0].iov_base, nbtlen);
|
|
|
|
status = smb1cli_conn_signv(state->conn, iov, iov_count,
|
|
&state->smb1.seqnum,
|
|
state->smb1.one_way_seqnum);
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* If we supported multiple encryption contexts
|
|
* here we'd look up based on tid.
|
|
*/
|
|
if (common_encryption_on(state->conn->smb1.trans_enc)) {
|
|
char *buf, *enc_buf;
|
|
|
|
buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
|
|
if (buf == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
status = common_encrypt_buffer(state->conn->smb1.trans_enc,
|
|
(char *)buf, &enc_buf);
|
|
TALLOC_FREE(buf);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0, ("Error in encrypting client message: %s\n",
|
|
nt_errstr(status)));
|
|
return status;
|
|
}
|
|
buf = (char *)talloc_memdup(state, enc_buf,
|
|
smb_len_nbt(enc_buf)+4);
|
|
SAFE_FREE(enc_buf);
|
|
if (buf == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
iov[0].iov_base = (void *)buf;
|
|
iov[0].iov_len = talloc_get_size(buf);
|
|
iov_count = 1;
|
|
}
|
|
|
|
if (state->conn->dispatch_incoming == NULL) {
|
|
state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
|
|
}
|
|
|
|
if (!smbXcli_req_set_pending(req)) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
|
|
|
|
subreq = writev_send(state, state->ev, state->conn->outgoing,
|
|
state->conn->sock_fd, false, iov, iov_count);
|
|
if (subreq == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
|
|
state->write_req = subreq;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint8_t smb_command,
|
|
uint8_t additional_flags,
|
|
uint8_t clear_flags,
|
|
uint16_t additional_flags2,
|
|
uint16_t clear_flags2,
|
|
uint32_t timeout_msec,
|
|
uint32_t pid,
|
|
struct smbXcli_tcon *tcon,
|
|
struct smbXcli_session *session,
|
|
uint8_t wct, uint16_t *vwv,
|
|
uint32_t num_bytes,
|
|
const uint8_t *bytes)
|
|
{
|
|
struct tevent_req *req;
|
|
struct iovec iov;
|
|
NTSTATUS status;
|
|
|
|
iov.iov_base = discard_const_p(void, bytes);
|
|
iov.iov_len = num_bytes;
|
|
|
|
req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
|
|
additional_flags, clear_flags,
|
|
additional_flags2, clear_flags2,
|
|
timeout_msec,
|
|
pid, tcon, session,
|
|
wct, vwv, 1, &iov);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
status = smb1cli_req_chain_submit(&req, 1);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
return req;
|
|
}
|
|
|
|
static void smb1cli_req_writev_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
ssize_t nwritten;
|
|
int err;
|
|
|
|
state->write_req = NULL;
|
|
|
|
nwritten = writev_recv(subreq, &err);
|
|
TALLOC_FREE(subreq);
|
|
if (nwritten == -1) {
|
|
/* here, we need to notify all pending requests */
|
|
NTSTATUS status = map_nt_error_from_unix_common(err);
|
|
smbXcli_conn_disconnect(state->conn, status);
|
|
return;
|
|
}
|
|
|
|
if (state->one_way) {
|
|
state->inbuf = NULL;
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void smbXcli_conn_received(struct tevent_req *subreq)
|
|
{
|
|
struct smbXcli_conn *conn =
|
|
tevent_req_callback_data(subreq,
|
|
struct smbXcli_conn);
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
NTSTATUS status;
|
|
uint8_t *inbuf;
|
|
ssize_t received;
|
|
int err;
|
|
|
|
if (subreq != conn->read_smb_req) {
|
|
DEBUG(1, ("Internal error: cli_smb_received called with "
|
|
"unexpected subreq\n"));
|
|
smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
|
|
TALLOC_FREE(frame);
|
|
return;
|
|
}
|
|
conn->read_smb_req = NULL;
|
|
|
|
received = read_smb_recv(subreq, frame, &inbuf, &err);
|
|
TALLOC_FREE(subreq);
|
|
if (received == -1) {
|
|
status = map_nt_error_from_unix_common(err);
|
|
smbXcli_conn_disconnect(conn, status);
|
|
TALLOC_FREE(frame);
|
|
return;
|
|
}
|
|
|
|
status = conn->dispatch_incoming(conn, frame, inbuf);
|
|
TALLOC_FREE(frame);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
/*
|
|
* We should not do any more processing
|
|
* as the dispatch function called
|
|
* tevent_req_done().
|
|
*/
|
|
return;
|
|
}
|
|
|
|
if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
|
|
/*
|
|
* We got an error, so notify all pending requests
|
|
*/
|
|
smbXcli_conn_disconnect(conn, status);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We got NT_STATUS_RETRY, so we may ask for a
|
|
* next incoming pdu.
|
|
*/
|
|
if (!smbXcli_conn_receive_next(conn)) {
|
|
smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
|
|
}
|
|
}
|
|
|
|
static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
|
|
struct iovec **piov, int *pnum_iov)
|
|
{
|
|
struct iovec *iov;
|
|
size_t num_iov;
|
|
size_t buflen;
|
|
size_t taken;
|
|
size_t remaining;
|
|
uint8_t *hdr;
|
|
uint8_t cmd;
|
|
uint32_t wct_ofs;
|
|
NTSTATUS status;
|
|
size_t min_size = MIN_SMB_SIZE;
|
|
|
|
buflen = smb_len_tcp(buf);
|
|
taken = 0;
|
|
|
|
hdr = buf + NBT_HDR_SIZE;
|
|
|
|
status = smb1cli_pull_raw_error(hdr);
|
|
if (NT_STATUS_IS_ERR(status)) {
|
|
/*
|
|
* This is an ugly hack to support OS/2
|
|
* which skips the byte_count in the DATA block
|
|
* on some error responses.
|
|
*
|
|
* See bug #9096
|
|
*/
|
|
min_size -= sizeof(uint16_t);
|
|
}
|
|
|
|
if (buflen < min_size) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* This returns iovec elements in the following order:
|
|
*
|
|
* - SMB header
|
|
*
|
|
* - Parameter Block
|
|
* - Data Block
|
|
*
|
|
* - Parameter Block
|
|
* - Data Block
|
|
*
|
|
* - Parameter Block
|
|
* - Data Block
|
|
*/
|
|
num_iov = 1;
|
|
|
|
iov = talloc_array(mem_ctx, struct iovec, num_iov);
|
|
if (iov == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
iov[0].iov_base = hdr;
|
|
iov[0].iov_len = HDR_WCT;
|
|
taken += HDR_WCT;
|
|
|
|
cmd = CVAL(hdr, HDR_COM);
|
|
wct_ofs = HDR_WCT;
|
|
|
|
while (true) {
|
|
size_t len = buflen - taken;
|
|
struct iovec *cur;
|
|
struct iovec *iov_tmp;
|
|
uint8_t wct;
|
|
uint32_t bcc_ofs;
|
|
uint16_t bcc;
|
|
size_t needed;
|
|
|
|
/*
|
|
* we need at least WCT
|
|
*/
|
|
needed = sizeof(uint8_t);
|
|
if (len < needed) {
|
|
DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
|
|
__location__, (int)len, (int)needed));
|
|
goto inval;
|
|
}
|
|
|
|
/*
|
|
* Now we check if the specified words are there
|
|
*/
|
|
wct = CVAL(hdr, wct_ofs);
|
|
needed += wct * sizeof(uint16_t);
|
|
if (len < needed) {
|
|
DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
|
|
__location__, (int)len, (int)needed));
|
|
goto inval;
|
|
}
|
|
|
|
if ((num_iov == 1) &&
|
|
(len == needed) &&
|
|
NT_STATUS_IS_ERR(status))
|
|
{
|
|
/*
|
|
* This is an ugly hack to support OS/2
|
|
* which skips the byte_count in the DATA block
|
|
* on some error responses.
|
|
*
|
|
* See bug #9096
|
|
*/
|
|
iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
|
|
num_iov + 2);
|
|
if (iov_tmp == NULL) {
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
iov = iov_tmp;
|
|
cur = &iov[num_iov];
|
|
num_iov += 2;
|
|
|
|
cur[0].iov_len = 0;
|
|
cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
|
|
cur[1].iov_len = 0;
|
|
cur[1].iov_base = cur[0].iov_base;
|
|
|
|
taken += needed;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* we need at least BCC
|
|
*/
|
|
needed += sizeof(uint16_t);
|
|
if (len < needed) {
|
|
DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
|
|
__location__, (int)len, (int)needed));
|
|
goto inval;
|
|
}
|
|
|
|
/*
|
|
* Now we check if the specified bytes are there
|
|
*/
|
|
bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
|
|
bcc = SVAL(hdr, bcc_ofs);
|
|
needed += bcc * sizeof(uint8_t);
|
|
if (len < needed) {
|
|
DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
|
|
__location__, (int)len, (int)needed));
|
|
goto inval;
|
|
}
|
|
|
|
/*
|
|
* we allocate 2 iovec structures for words and bytes
|
|
*/
|
|
iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
|
|
num_iov + 2);
|
|
if (iov_tmp == NULL) {
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
iov = iov_tmp;
|
|
cur = &iov[num_iov];
|
|
num_iov += 2;
|
|
|
|
cur[0].iov_len = wct * sizeof(uint16_t);
|
|
cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
|
|
cur[1].iov_len = bcc * sizeof(uint8_t);
|
|
cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
|
|
|
|
taken += needed;
|
|
|
|
if (!smb1cli_is_andx_req(cmd)) {
|
|
/*
|
|
* If the current command does not have AndX chanining
|
|
* we are done.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
if (wct == 0 && bcc == 0) {
|
|
/*
|
|
* An empty response also ends the chain,
|
|
* most likely with an error.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
if (wct < 2) {
|
|
DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
|
|
__location__, (int)wct, (int)cmd));
|
|
goto inval;
|
|
}
|
|
cmd = CVAL(cur[0].iov_base, 0);
|
|
if (cmd == 0xFF) {
|
|
/*
|
|
* If it is the end of the chain we are also done.
|
|
*/
|
|
break;
|
|
}
|
|
wct_ofs = SVAL(cur[0].iov_base, 2);
|
|
|
|
if (wct_ofs < taken) {
|
|
goto inval;
|
|
}
|
|
if (wct_ofs > buflen) {
|
|
goto inval;
|
|
}
|
|
|
|
/*
|
|
* we consumed everything up to the start of the next
|
|
* parameter block.
|
|
*/
|
|
taken = wct_ofs;
|
|
}
|
|
|
|
remaining = buflen - taken;
|
|
|
|
if (remaining > 0 && num_iov >= 3) {
|
|
/*
|
|
* The last DATA block gets the remaining
|
|
* bytes, this is needed to support
|
|
* CAP_LARGE_WRITEX and CAP_LARGE_READX.
|
|
*/
|
|
iov[num_iov-1].iov_len += remaining;
|
|
}
|
|
|
|
*piov = iov;
|
|
*pnum_iov = num_iov;
|
|
return NT_STATUS_OK;
|
|
|
|
inval:
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *tmp_mem,
|
|
uint8_t *inbuf)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state;
|
|
NTSTATUS status;
|
|
size_t num_pending;
|
|
size_t i;
|
|
uint8_t cmd;
|
|
uint16_t mid;
|
|
bool oplock_break;
|
|
uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
|
|
size_t len = smb_len_tcp(inbuf);
|
|
struct iovec *iov = NULL;
|
|
int num_iov = 0;
|
|
struct tevent_req **chain = NULL;
|
|
size_t num_chained = 0;
|
|
size_t num_responses = 0;
|
|
|
|
if (conn->smb1.read_braw_req != NULL) {
|
|
req = conn->smb1.read_braw_req;
|
|
conn->smb1.read_braw_req = NULL;
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
if (state->smb1.recv_iov == NULL) {
|
|
/*
|
|
* For requests with more than
|
|
* one response, we have to readd the
|
|
* recv_iov array.
|
|
*/
|
|
state->smb1.recv_iov = talloc_zero_array(state,
|
|
struct iovec,
|
|
3);
|
|
if (tevent_req_nomem(state->smb1.recv_iov, req)) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
}
|
|
|
|
state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
|
|
state->smb1.recv_iov[0].iov_len = len;
|
|
ZERO_STRUCT(state->smb1.recv_iov[1]);
|
|
ZERO_STRUCT(state->smb1.recv_iov[2]);
|
|
|
|
state->smb1.recv_cmd = SMBreadBraw;
|
|
state->smb1.recv_status = NT_STATUS_OK;
|
|
state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
|
|
|
|
tevent_req_done(req);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
|
|
&& (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
|
|
DEBUG(10, ("Got non-SMB PDU\n"));
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* If we supported multiple encryption contexts
|
|
* here we'd look up based on tid.
|
|
*/
|
|
if (common_encryption_on(conn->smb1.trans_enc)
|
|
&& (CVAL(inbuf, 0) == 0)) {
|
|
uint16_t enc_ctx_num;
|
|
|
|
status = get_enc_ctx_num(inbuf, &enc_ctx_num);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("get_enc_ctx_num returned %s\n",
|
|
nt_errstr(status)));
|
|
return status;
|
|
}
|
|
|
|
if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
|
|
DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
|
|
enc_ctx_num,
|
|
conn->smb1.trans_enc->enc_ctx_num));
|
|
return NT_STATUS_INVALID_HANDLE;
|
|
}
|
|
|
|
status = common_decrypt_buffer(conn->smb1.trans_enc,
|
|
(char *)inbuf);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("common_decrypt_buffer returned %s\n",
|
|
nt_errstr(status)));
|
|
return status;
|
|
}
|
|
inhdr = inbuf + NBT_HDR_SIZE;
|
|
len = smb_len_nbt(inbuf);
|
|
}
|
|
|
|
mid = SVAL(inhdr, HDR_MID);
|
|
num_pending = talloc_array_length(conn->pending);
|
|
|
|
for (i=0; i<num_pending; i++) {
|
|
if (mid == smb1cli_req_mid(conn->pending[i])) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == num_pending) {
|
|
/* Dump unexpected reply */
|
|
return NT_STATUS_RETRY;
|
|
}
|
|
|
|
oplock_break = false;
|
|
|
|
if (mid == 0xffff) {
|
|
/*
|
|
* Paranoia checks that this is really an oplock break request.
|
|
*/
|
|
oplock_break = (len == 51); /* hdr + 8 words */
|
|
oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
|
|
oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
|
|
oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
|
|
oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
|
|
|
|
if (!oplock_break) {
|
|
/* Dump unexpected reply */
|
|
return NT_STATUS_RETRY;
|
|
}
|
|
}
|
|
|
|
req = conn->pending[i];
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
if (!oplock_break /* oplock breaks are not signed */
|
|
&& !smb1_signing_check_pdu(conn->smb1.signing,
|
|
inhdr, len, state->smb1.seqnum+1)) {
|
|
DEBUG(10, ("cli_check_sign_mac failed\n"));
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
|
|
&iov, &num_iov);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
|
|
nt_errstr(status)));
|
|
return status;
|
|
}
|
|
|
|
cmd = CVAL(inhdr, HDR_COM);
|
|
status = smb1cli_pull_raw_error(inhdr);
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
|
|
(state->session != NULL) && state->session->disconnect_expired)
|
|
{
|
|
/*
|
|
* this should be a short term hack
|
|
* until the upper layers have implemented
|
|
* re-authentication.
|
|
*/
|
|
return status;
|
|
}
|
|
|
|
if (state->smb1.chained_requests == NULL) {
|
|
if (num_iov != 3) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
if (state->smb1.recv_iov == NULL) {
|
|
/*
|
|
* For requests with more than
|
|
* one response, we have to readd the
|
|
* recv_iov array.
|
|
*/
|
|
state->smb1.recv_iov = talloc_zero_array(state,
|
|
struct iovec,
|
|
3);
|
|
if (tevent_req_nomem(state->smb1.recv_iov, req)) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
}
|
|
|
|
state->smb1.recv_cmd = cmd;
|
|
state->smb1.recv_status = status;
|
|
state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
|
|
|
|
state->smb1.recv_iov[0] = iov[0];
|
|
state->smb1.recv_iov[1] = iov[1];
|
|
state->smb1.recv_iov[2] = iov[2];
|
|
|
|
if (talloc_array_length(conn->pending) == 0) {
|
|
tevent_req_done(req);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
tevent_req_defer_callback(req, state->ev);
|
|
tevent_req_done(req);
|
|
return NT_STATUS_RETRY;
|
|
}
|
|
|
|
chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
|
|
num_chained = talloc_array_length(chain);
|
|
num_responses = (num_iov - 1)/2;
|
|
|
|
if (num_responses > num_chained) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
for (i=0; i<num_chained; i++) {
|
|
size_t iov_idx = 1 + (i*2);
|
|
struct iovec *cur = &iov[iov_idx];
|
|
uint8_t *inbuf_ref;
|
|
|
|
req = chain[i];
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
/*
|
|
* as we finish multiple requests here
|
|
* we need to defer the callbacks as
|
|
* they could destroy our current stack state.
|
|
*/
|
|
tevent_req_defer_callback(req, state->ev);
|
|
|
|
if (i >= num_responses) {
|
|
tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
|
|
continue;
|
|
}
|
|
|
|
if (state->smb1.recv_iov == NULL) {
|
|
/*
|
|
* For requests with more than
|
|
* one response, we have to readd the
|
|
* recv_iov array.
|
|
*/
|
|
state->smb1.recv_iov = talloc_zero_array(state,
|
|
struct iovec,
|
|
3);
|
|
if (tevent_req_nomem(state->smb1.recv_iov, req)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
state->smb1.recv_cmd = cmd;
|
|
|
|
if (i == (num_responses - 1)) {
|
|
/*
|
|
* The last request in the chain gets the status
|
|
*/
|
|
state->smb1.recv_status = status;
|
|
} else {
|
|
cmd = CVAL(cur[0].iov_base, 0);
|
|
state->smb1.recv_status = NT_STATUS_OK;
|
|
}
|
|
|
|
state->inbuf = inbuf;
|
|
|
|
/*
|
|
* Note: here we use talloc_reference() in a way
|
|
* that does not expose it to the caller.
|
|
*/
|
|
inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
|
|
if (tevent_req_nomem(inbuf_ref, req)) {
|
|
continue;
|
|
}
|
|
|
|
/* copy the related buffers */
|
|
state->smb1.recv_iov[0] = iov[0];
|
|
state->smb1.recv_iov[1] = cur[0];
|
|
state->smb1.recv_iov[2] = cur[1];
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
return NT_STATUS_RETRY;
|
|
}
|
|
|
|
NTSTATUS smb1cli_req_recv(struct tevent_req *req,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct iovec **piov,
|
|
uint8_t **phdr,
|
|
uint8_t *pwct,
|
|
uint16_t **pvwv,
|
|
uint32_t *pvwv_offset,
|
|
uint32_t *pnum_bytes,
|
|
uint8_t **pbytes,
|
|
uint32_t *pbytes_offset,
|
|
uint8_t **pinbuf,
|
|
const struct smb1cli_req_expected_response *expected,
|
|
size_t num_expected)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
NTSTATUS status = NT_STATUS_OK;
|
|
struct iovec *recv_iov = NULL;
|
|
uint8_t *hdr = NULL;
|
|
uint8_t wct = 0;
|
|
uint32_t vwv_offset = 0;
|
|
uint16_t *vwv = NULL;
|
|
uint32_t num_bytes = 0;
|
|
uint32_t bytes_offset = 0;
|
|
uint8_t *bytes = NULL;
|
|
size_t i;
|
|
bool found_status = false;
|
|
bool found_size = false;
|
|
|
|
if (piov != NULL) {
|
|
*piov = NULL;
|
|
}
|
|
if (phdr != NULL) {
|
|
*phdr = 0;
|
|
}
|
|
if (pwct != NULL) {
|
|
*pwct = 0;
|
|
}
|
|
if (pvwv != NULL) {
|
|
*pvwv = NULL;
|
|
}
|
|
if (pvwv_offset != NULL) {
|
|
*pvwv_offset = 0;
|
|
}
|
|
if (pnum_bytes != NULL) {
|
|
*pnum_bytes = 0;
|
|
}
|
|
if (pbytes != NULL) {
|
|
*pbytes = NULL;
|
|
}
|
|
if (pbytes_offset != NULL) {
|
|
*pbytes_offset = 0;
|
|
}
|
|
if (pinbuf != NULL) {
|
|
*pinbuf = NULL;
|
|
}
|
|
|
|
if (state->inbuf != NULL) {
|
|
recv_iov = state->smb1.recv_iov;
|
|
state->smb1.recv_iov = NULL;
|
|
if (state->smb1.recv_cmd != SMBreadBraw) {
|
|
hdr = (uint8_t *)recv_iov[0].iov_base;
|
|
wct = recv_iov[1].iov_len/2;
|
|
vwv = (uint16_t *)recv_iov[1].iov_base;
|
|
vwv_offset = PTR_DIFF(vwv, hdr);
|
|
num_bytes = recv_iov[2].iov_len;
|
|
bytes = (uint8_t *)recv_iov[2].iov_base;
|
|
bytes_offset = PTR_DIFF(bytes, hdr);
|
|
}
|
|
}
|
|
|
|
if (tevent_req_is_nterror(req, &status)) {
|
|
for (i=0; i < num_expected; i++) {
|
|
if (NT_STATUS_EQUAL(status, expected[i].status)) {
|
|
found_status = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found_status) {
|
|
return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
if (num_expected == 0) {
|
|
found_status = true;
|
|
found_size = true;
|
|
}
|
|
|
|
status = state->smb1.recv_status;
|
|
|
|
for (i=0; i < num_expected; i++) {
|
|
if (!NT_STATUS_EQUAL(status, expected[i].status)) {
|
|
continue;
|
|
}
|
|
|
|
found_status = true;
|
|
if (expected[i].wct == 0) {
|
|
found_size = true;
|
|
break;
|
|
}
|
|
|
|
if (expected[i].wct == wct) {
|
|
found_size = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found_status) {
|
|
return status;
|
|
}
|
|
|
|
if (!found_size) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
if (piov != NULL) {
|
|
*piov = talloc_move(mem_ctx, &recv_iov);
|
|
}
|
|
|
|
if (phdr != NULL) {
|
|
*phdr = hdr;
|
|
}
|
|
if (pwct != NULL) {
|
|
*pwct = wct;
|
|
}
|
|
if (pvwv != NULL) {
|
|
*pvwv = vwv;
|
|
}
|
|
if (pvwv_offset != NULL) {
|
|
*pvwv_offset = vwv_offset;
|
|
}
|
|
if (pnum_bytes != NULL) {
|
|
*pnum_bytes = num_bytes;
|
|
}
|
|
if (pbytes != NULL) {
|
|
*pbytes = bytes;
|
|
}
|
|
if (pbytes_offset != NULL) {
|
|
*pbytes_offset = bytes_offset;
|
|
}
|
|
if (pinbuf != NULL) {
|
|
*pinbuf = state->inbuf;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
|
|
{
|
|
size_t wct_ofs;
|
|
int i;
|
|
|
|
wct_ofs = HDR_WCT;
|
|
|
|
for (i=0; i<num_reqs; i++) {
|
|
struct smbXcli_req_state *state;
|
|
state = tevent_req_data(reqs[i], struct smbXcli_req_state);
|
|
wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
|
|
state->smb1.iov_count-2);
|
|
wct_ofs = (wct_ofs + 3) & ~3;
|
|
}
|
|
return wct_ofs;
|
|
}
|
|
|
|
NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
|
|
{
|
|
struct smbXcli_req_state *first_state =
|
|
tevent_req_data(reqs[0],
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_req_state *state;
|
|
size_t wct_offset;
|
|
size_t chain_padding = 0;
|
|
int i, iovlen;
|
|
struct iovec *iov = NULL;
|
|
struct iovec *this_iov;
|
|
NTSTATUS status;
|
|
ssize_t nbt_len;
|
|
|
|
if (num_reqs == 1) {
|
|
return smb1cli_req_writev_submit(reqs[0], first_state,
|
|
first_state->smb1.iov,
|
|
first_state->smb1.iov_count);
|
|
}
|
|
|
|
iovlen = 0;
|
|
for (i=0; i<num_reqs; i++) {
|
|
if (!tevent_req_is_in_progress(reqs[i])) {
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
state = tevent_req_data(reqs[i], struct smbXcli_req_state);
|
|
|
|
if (state->smb1.iov_count < 4) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (i == 0) {
|
|
/*
|
|
* The NBT and SMB header
|
|
*/
|
|
iovlen += 2;
|
|
} else {
|
|
/*
|
|
* Chain padding
|
|
*/
|
|
iovlen += 1;
|
|
}
|
|
|
|
/*
|
|
* words and bytes
|
|
*/
|
|
iovlen += state->smb1.iov_count - 2;
|
|
}
|
|
|
|
iov = talloc_zero_array(first_state, struct iovec, iovlen);
|
|
if (iov == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
|
|
first_state, reqs, sizeof(*reqs) * num_reqs);
|
|
if (first_state->smb1.chained_requests == NULL) {
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
wct_offset = HDR_WCT;
|
|
this_iov = iov;
|
|
|
|
for (i=0; i<num_reqs; i++) {
|
|
size_t next_padding = 0;
|
|
uint16_t *vwv;
|
|
|
|
state = tevent_req_data(reqs[i], struct smbXcli_req_state);
|
|
|
|
if (i < num_reqs-1) {
|
|
if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
|
|
|| CVAL(state->smb1.hdr, HDR_WCT) < 2) {
|
|
TALLOC_FREE(iov);
|
|
TALLOC_FREE(first_state->smb1.chained_requests);
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
}
|
|
|
|
wct_offset += smbXcli_iov_len(state->smb1.iov+2,
|
|
state->smb1.iov_count-2) + 1;
|
|
if ((wct_offset % 4) != 0) {
|
|
next_padding = 4 - (wct_offset % 4);
|
|
}
|
|
wct_offset += next_padding;
|
|
vwv = state->smb1.vwv;
|
|
|
|
if (i < num_reqs-1) {
|
|
struct smbXcli_req_state *next_state =
|
|
tevent_req_data(reqs[i+1],
|
|
struct smbXcli_req_state);
|
|
SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
|
|
SCVAL(vwv+0, 1, 0);
|
|
SSVAL(vwv+1, 0, wct_offset);
|
|
} else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
|
|
/* properly end the chain */
|
|
SCVAL(vwv+0, 0, 0xff);
|
|
SCVAL(vwv+0, 1, 0xff);
|
|
SSVAL(vwv+1, 0, 0);
|
|
}
|
|
|
|
if (i == 0) {
|
|
/*
|
|
* The NBT and SMB header
|
|
*/
|
|
this_iov[0] = state->smb1.iov[0];
|
|
this_iov[1] = state->smb1.iov[1];
|
|
this_iov += 2;
|
|
} else {
|
|
/*
|
|
* This one is a bit subtle. We have to add
|
|
* chain_padding bytes between the requests, and we
|
|
* have to also include the wct field of the
|
|
* subsequent requests. We use the subsequent header
|
|
* for the padding, it contains the wct field in its
|
|
* last byte.
|
|
*/
|
|
this_iov[0].iov_len = chain_padding+1;
|
|
this_iov[0].iov_base = (void *)&state->smb1.hdr[
|
|
sizeof(state->smb1.hdr) - this_iov[0].iov_len];
|
|
memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
|
|
this_iov += 1;
|
|
}
|
|
|
|
/*
|
|
* copy the words and bytes
|
|
*/
|
|
memcpy(this_iov, state->smb1.iov+2,
|
|
sizeof(struct iovec) * (state->smb1.iov_count-2));
|
|
this_iov += state->smb1.iov_count - 2;
|
|
chain_padding = next_padding;
|
|
}
|
|
|
|
nbt_len = iov_buflen(&iov[1], iovlen-1);
|
|
if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
|
|
TALLOC_FREE(iov);
|
|
TALLOC_FREE(first_state->smb1.chained_requests);
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(iov);
|
|
TALLOC_FREE(first_state->smb1.chained_requests);
|
|
return status;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
struct tevent_queue *smbXcli_conn_send_queue(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->outgoing;
|
|
}
|
|
|
|
bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
|
|
{
|
|
return ((tevent_queue_length(conn->outgoing) != 0)
|
|
|| (talloc_array_length(conn->pending) != 0));
|
|
}
|
|
|
|
bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol >= PROTOCOL_SMB2_02) {
|
|
return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
|
|
}
|
|
|
|
return (smb1cli_conn_capabilities(conn) & CAP_DFS);
|
|
}
|
|
|
|
bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
|
|
{
|
|
uint16_t credits = 1;
|
|
|
|
if (conn->smb2.cur_credits == 0) {
|
|
if (max_dyn_len != NULL) {
|
|
*max_dyn_len = 0;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
|
|
credits = conn->smb2.cur_credits;
|
|
}
|
|
|
|
if (max_dyn_len != NULL) {
|
|
*max_dyn_len = credits * 65536;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.capabilities;
|
|
}
|
|
|
|
uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.security_mode;
|
|
}
|
|
|
|
uint16_t smb2cli_conn_server_signing_algo(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.sign_algo;
|
|
}
|
|
|
|
uint16_t smb2cli_conn_server_encryption_algo(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.cipher;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.max_trans_size;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.max_read_size;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.server.max_write_size;
|
|
}
|
|
|
|
void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
|
|
uint16_t max_credits)
|
|
{
|
|
conn->smb2.max_credits = max_credits;
|
|
}
|
|
|
|
uint16_t smb2cli_conn_get_cur_credits(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.cur_credits;
|
|
}
|
|
|
|
uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
|
|
{
|
|
if (conn->protocol < PROTOCOL_SMB3_11) {
|
|
return 0;
|
|
}
|
|
|
|
return conn->smb2.io_priority;
|
|
}
|
|
|
|
void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
|
|
uint8_t io_priority)
|
|
{
|
|
conn->smb2.io_priority = io_priority;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.cc_chunk_len;
|
|
}
|
|
|
|
void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
|
|
uint32_t chunk_len)
|
|
{
|
|
conn->smb2.cc_chunk_len = chunk_len;
|
|
}
|
|
|
|
uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.cc_max_chunks;
|
|
}
|
|
|
|
void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
|
|
uint32_t max_chunks)
|
|
{
|
|
conn->smb2.cc_max_chunks = max_chunks;
|
|
}
|
|
|
|
static void smb2cli_req_cancel_done(struct tevent_req *subreq);
|
|
|
|
static bool smb2cli_req_cancel(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
struct smbXcli_tcon *tcon = state->tcon;
|
|
struct smbXcli_session *session = state->session;
|
|
uint8_t *fixed = state->smb2.pad;
|
|
uint16_t fixed_len = 4;
|
|
struct tevent_req *subreq;
|
|
struct smbXcli_req_state *substate;
|
|
NTSTATUS status;
|
|
|
|
if (state->smb2.cancel_mid == UINT64_MAX) {
|
|
/*
|
|
* We already send a cancel,
|
|
* make sure we don't do it
|
|
* twice, otherwise we may
|
|
* expose the same NONCE for
|
|
* AES-128-GMAC signing
|
|
*/
|
|
return true;
|
|
}
|
|
|
|
SSVAL(fixed, 0, 0x04);
|
|
SSVAL(fixed, 2, 0);
|
|
|
|
subreq = smb2cli_req_create(state, state->ev,
|
|
state->conn,
|
|
SMB2_OP_CANCEL,
|
|
0, 0, /* flags */
|
|
0, /* timeout */
|
|
tcon, session,
|
|
fixed, fixed_len,
|
|
NULL, 0, 0);
|
|
if (subreq == NULL) {
|
|
return false;
|
|
}
|
|
substate = tevent_req_data(subreq, struct smbXcli_req_state);
|
|
|
|
substate->smb2.cancel_mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
|
|
|
|
SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
|
|
SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
|
|
SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
|
|
|
|
/*
|
|
* remember that we don't send a cancel again
|
|
*/
|
|
state->smb2.cancel_mid = UINT64_MAX;
|
|
|
|
status = smb2cli_req_compound_submit(&subreq, 1);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(subreq);
|
|
return false;
|
|
}
|
|
|
|
tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void smb2cli_req_cancel_done(struct tevent_req *subreq)
|
|
{
|
|
/* we do not care about the result */
|
|
TALLOC_FREE(subreq);
|
|
}
|
|
|
|
struct timeval smbXcli_req_endtime(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state = tevent_req_data(
|
|
req, struct smbXcli_req_state);
|
|
|
|
return state->endtime;
|
|
}
|
|
|
|
struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint16_t cmd,
|
|
uint32_t additional_flags,
|
|
uint32_t clear_flags,
|
|
uint32_t timeout_msec,
|
|
struct smbXcli_tcon *tcon,
|
|
struct smbXcli_session *session,
|
|
const uint8_t *fixed,
|
|
uint16_t fixed_len,
|
|
const uint8_t *dyn,
|
|
uint32_t dyn_len,
|
|
uint32_t max_dyn_len)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state;
|
|
uint32_t flags = 0;
|
|
uint32_t tid = 0;
|
|
uint64_t uid = 0;
|
|
bool use_channel_sequence = conn->smb2.force_channel_sequence;
|
|
uint16_t channel_sequence = 0;
|
|
bool use_replay_flag = false;
|
|
enum protocol_types proto = smbXcli_conn_protocol(conn);
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smbXcli_req_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if ((proto > PROTOCOL_NONE) && (proto < PROTOCOL_SMB2_02)) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
|
|
return req;
|
|
}
|
|
|
|
state->ev = ev;
|
|
state->conn = conn;
|
|
state->session = session;
|
|
state->tcon = tcon;
|
|
|
|
if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
|
|
use_channel_sequence = true;
|
|
} else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
|
|
use_channel_sequence = true;
|
|
}
|
|
|
|
if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
|
|
use_replay_flag = true;
|
|
}
|
|
|
|
if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
|
|
flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
|
|
}
|
|
|
|
if (session) {
|
|
uid = session->smb2->session_id;
|
|
|
|
if (use_channel_sequence) {
|
|
channel_sequence = session->smb2->channel_sequence;
|
|
}
|
|
|
|
if (use_replay_flag && session->smb2->replay_active) {
|
|
additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
|
|
}
|
|
|
|
state->smb2.should_sign = session->smb2->should_sign;
|
|
state->smb2.should_encrypt = session->smb2->should_encrypt;
|
|
state->smb2.require_signed_response =
|
|
session->smb2->require_signed_response;
|
|
|
|
if (cmd == SMB2_OP_SESSSETUP &&
|
|
!smb2_signing_key_valid(session->smb2_channel.signing_key) &&
|
|
smb2_signing_key_valid(session->smb2->signing_key))
|
|
{
|
|
/*
|
|
* a session bind needs to be signed
|
|
*/
|
|
state->smb2.should_sign = true;
|
|
}
|
|
|
|
if (cmd == SMB2_OP_SESSSETUP &&
|
|
!smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
state->smb2.should_encrypt = false;
|
|
}
|
|
|
|
if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
|
|
if (!smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
|
|
return req;
|
|
}
|
|
|
|
additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
|
|
state->smb2.should_sign = true;
|
|
}
|
|
}
|
|
|
|
if (tcon) {
|
|
tid = tcon->smb2.tcon_id;
|
|
|
|
if (tcon->smb2.should_sign) {
|
|
state->smb2.should_sign = true;
|
|
}
|
|
if (tcon->smb2.should_encrypt) {
|
|
state->smb2.should_encrypt = true;
|
|
}
|
|
}
|
|
|
|
if (state->smb2.should_encrypt) {
|
|
state->smb2.should_sign = false;
|
|
}
|
|
|
|
state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
|
|
if (tevent_req_nomem(state->smb2.recv_iov, req)) {
|
|
return req;
|
|
}
|
|
|
|
flags |= additional_flags;
|
|
flags &= ~clear_flags;
|
|
|
|
state->smb2.fixed = fixed;
|
|
state->smb2.fixed_len = fixed_len;
|
|
state->smb2.dyn = dyn;
|
|
state->smb2.dyn_len = dyn_len;
|
|
state->smb2.max_dyn_len = max_dyn_len;
|
|
|
|
if (state->smb2.should_encrypt) {
|
|
SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
|
|
SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
|
|
}
|
|
|
|
SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
|
|
SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
|
|
SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
|
|
SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
|
|
SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
|
|
SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
|
|
SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
|
|
SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
|
|
|
|
switch (cmd) {
|
|
case SMB2_OP_CANCEL:
|
|
state->one_way = true;
|
|
break;
|
|
case SMB2_OP_BREAK:
|
|
/*
|
|
* If this is a dummy request, it will have
|
|
* UINT64_MAX as message id.
|
|
* If we send on break acknowledgement,
|
|
* this gets overwritten later.
|
|
*/
|
|
SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
|
|
break;
|
|
}
|
|
|
|
if (timeout_msec > 0) {
|
|
state->endtime = timeval_current_ofs_msec(timeout_msec);
|
|
if (!tevent_req_set_endtime(req, ev, state->endtime)) {
|
|
return req;
|
|
}
|
|
}
|
|
|
|
return req;
|
|
}
|
|
|
|
void smb2cli_req_set_notify_async(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
state->smb2.notify_async = true;
|
|
}
|
|
|
|
static void smb2cli_req_writev_done(struct tevent_req *subreq);
|
|
static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *tmp_mem,
|
|
uint8_t *inbuf);
|
|
|
|
NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
|
|
int num_reqs)
|
|
{
|
|
struct smbXcli_req_state *state;
|
|
struct tevent_req *subreq;
|
|
struct iovec *iov;
|
|
int i, num_iov, nbt_len;
|
|
int tf_iov = -1;
|
|
struct smb2_signing_key *encryption_key = NULL;
|
|
uint64_t encryption_session_id = 0;
|
|
uint64_t nonce_high = UINT64_MAX;
|
|
uint64_t nonce_low = UINT64_MAX;
|
|
|
|
/*
|
|
* 1 for the nbt length, optional TRANSFORM
|
|
* per request: HDR, fixed, dyn, padding
|
|
* -1 because the last one does not need padding
|
|
*/
|
|
|
|
iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
|
|
if (iov == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
num_iov = 1;
|
|
nbt_len = 0;
|
|
|
|
/*
|
|
* the session of the first request that requires encryption
|
|
* specifies the encryption key.
|
|
*/
|
|
for (i=0; i<num_reqs; i++) {
|
|
if (!tevent_req_is_in_progress(reqs[i])) {
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
state = tevent_req_data(reqs[i], struct smbXcli_req_state);
|
|
|
|
if (!smbXcli_conn_is_connected(state->conn)) {
|
|
return NT_STATUS_CONNECTION_DISCONNECTED;
|
|
}
|
|
|
|
if ((state->conn->protocol != PROTOCOL_NONE) &&
|
|
(state->conn->protocol < PROTOCOL_SMB2_02)) {
|
|
return NT_STATUS_REVISION_MISMATCH;
|
|
}
|
|
|
|
if (state->session == NULL) {
|
|
continue;
|
|
}
|
|
|
|
if (!state->smb2.should_encrypt) {
|
|
continue;
|
|
}
|
|
|
|
encryption_key = state->session->smb2->encryption_key;
|
|
if (!smb2_signing_key_valid(encryption_key)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
encryption_session_id = state->session->smb2->session_id;
|
|
|
|
state->session->smb2->nonce_low += 1;
|
|
if (state->session->smb2->nonce_low == 0) {
|
|
state->session->smb2->nonce_high += 1;
|
|
state->session->smb2->nonce_low += 1;
|
|
}
|
|
|
|
/*
|
|
* CCM and GCM algorithms must never have their
|
|
* nonce wrap, or the security of the whole
|
|
* communication and the keys is destroyed.
|
|
* We must drop the connection once we have
|
|
* transferred too much data.
|
|
*
|
|
* NOTE: We assume nonces greater than 8 bytes.
|
|
*/
|
|
if (state->session->smb2->nonce_high >=
|
|
state->session->smb2->nonce_high_max)
|
|
{
|
|
return NT_STATUS_ENCRYPTION_FAILED;
|
|
}
|
|
|
|
nonce_high = state->session->smb2->nonce_high_random;
|
|
nonce_high += state->session->smb2->nonce_high;
|
|
nonce_low = state->session->smb2->nonce_low;
|
|
|
|
tf_iov = num_iov;
|
|
iov[num_iov].iov_base = state->smb2.transform;
|
|
iov[num_iov].iov_len = sizeof(state->smb2.transform);
|
|
num_iov += 1;
|
|
|
|
SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
|
|
SBVAL(state->smb2.transform, SMB2_TF_NONCE,
|
|
nonce_low);
|
|
SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
|
|
nonce_high);
|
|
SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
|
|
encryption_session_id);
|
|
|
|
nbt_len += SMB2_TF_HDR_SIZE;
|
|
break;
|
|
}
|
|
|
|
for (i=0; i<num_reqs; i++) {
|
|
int hdr_iov;
|
|
size_t reqlen;
|
|
bool ret;
|
|
uint16_t opcode;
|
|
uint64_t avail;
|
|
uint16_t charge;
|
|
uint16_t credits;
|
|
uint64_t mid;
|
|
struct smb2_signing_key *signing_key = NULL;
|
|
|
|
if (!tevent_req_is_in_progress(reqs[i])) {
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
state = tevent_req_data(reqs[i], struct smbXcli_req_state);
|
|
|
|
if (!smbXcli_conn_is_connected(state->conn)) {
|
|
return NT_STATUS_CONNECTION_DISCONNECTED;
|
|
}
|
|
|
|
if ((state->conn->protocol != PROTOCOL_NONE) &&
|
|
(state->conn->protocol < PROTOCOL_SMB2_02)) {
|
|
return NT_STATUS_REVISION_MISMATCH;
|
|
}
|
|
|
|
opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
|
|
if (opcode == SMB2_OP_CANCEL) {
|
|
goto skip_credits;
|
|
}
|
|
|
|
avail = UINT64_MAX - state->conn->smb2.mid;
|
|
if (avail < 1) {
|
|
return NT_STATUS_CONNECTION_ABORTED;
|
|
}
|
|
|
|
if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
|
|
uint32_t max_dyn_len = 1;
|
|
|
|
max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
|
|
max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
|
|
|
|
charge = (max_dyn_len - 1)/ 65536 + 1;
|
|
} else {
|
|
charge = 1;
|
|
}
|
|
|
|
charge = MAX(state->smb2.credit_charge, charge);
|
|
|
|
avail = MIN(avail, state->conn->smb2.cur_credits);
|
|
if (avail < charge) {
|
|
DBG_ERR("Insufficient credits. "
|
|
"%"PRIu64" available, %"PRIu16" needed\n",
|
|
avail, charge);
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
credits = 0;
|
|
if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
|
|
credits = state->conn->smb2.max_credits -
|
|
state->conn->smb2.cur_credits;
|
|
}
|
|
if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
|
|
credits += 1;
|
|
}
|
|
|
|
mid = state->conn->smb2.mid;
|
|
state->conn->smb2.mid += charge;
|
|
state->conn->smb2.cur_credits -= charge;
|
|
|
|
if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
|
|
SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
|
|
}
|
|
SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
|
|
SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
|
|
|
|
state->smb2.cancel_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
|
|
state->smb2.cancel_flags &= ~SMB2_HDR_FLAG_CHAINED;
|
|
if (state->conn->smb2.server.sign_algo >= SMB2_SIGNING_AES128_GMAC) {
|
|
state->smb2.cancel_mid = mid;
|
|
} else {
|
|
state->smb2.cancel_mid = 0;
|
|
}
|
|
state->smb2.cancel_aid = 0;
|
|
|
|
skip_credits:
|
|
if (state->session && encryption_key == NULL) {
|
|
/*
|
|
* We prefer the channel signing key if it is
|
|
* already there.
|
|
*/
|
|
if (state->smb2.should_sign) {
|
|
signing_key = state->session->smb2_channel.signing_key;
|
|
}
|
|
|
|
/*
|
|
* If it is a channel binding, we already have the main
|
|
* signing key and try that one.
|
|
*/
|
|
if (signing_key != NULL &&
|
|
!smb2_signing_key_valid(signing_key)) {
|
|
signing_key = state->session->smb2->signing_key;
|
|
}
|
|
|
|
/*
|
|
* If we do not have any session key yet, we skip the
|
|
* signing of SMB2_OP_SESSSETUP requests.
|
|
*/
|
|
if (signing_key != NULL &&
|
|
!smb2_signing_key_valid(signing_key)) {
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
|
|
hdr_iov = num_iov;
|
|
iov[num_iov].iov_base = state->smb2.hdr;
|
|
iov[num_iov].iov_len = sizeof(state->smb2.hdr);
|
|
num_iov += 1;
|
|
|
|
iov[num_iov].iov_base = discard_const(state->smb2.fixed);
|
|
iov[num_iov].iov_len = state->smb2.fixed_len;
|
|
num_iov += 1;
|
|
|
|
if (state->smb2.dyn != NULL) {
|
|
iov[num_iov].iov_base = discard_const(state->smb2.dyn);
|
|
iov[num_iov].iov_len = state->smb2.dyn_len;
|
|
num_iov += 1;
|
|
}
|
|
|
|
reqlen = sizeof(state->smb2.hdr);
|
|
reqlen += state->smb2.fixed_len;
|
|
reqlen += state->smb2.dyn_len;
|
|
|
|
if (i < num_reqs-1) {
|
|
if ((reqlen % 8) > 0) {
|
|
uint8_t pad = 8 - (reqlen % 8);
|
|
iov[num_iov].iov_base = state->smb2.pad;
|
|
iov[num_iov].iov_len = pad;
|
|
num_iov += 1;
|
|
reqlen += pad;
|
|
}
|
|
SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
|
|
}
|
|
|
|
state->smb2.encryption_session_id = encryption_session_id;
|
|
|
|
if (signing_key != NULL) {
|
|
NTSTATUS status;
|
|
|
|
status = smb2_signing_sign_pdu(signing_key,
|
|
&iov[hdr_iov], num_iov - hdr_iov);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
nbt_len += reqlen;
|
|
|
|
ret = smbXcli_req_set_pending(reqs[i]);
|
|
if (!ret) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
state = tevent_req_data(reqs[0], struct smbXcli_req_state);
|
|
_smb_setlen_tcp(state->length_hdr, nbt_len);
|
|
iov[0].iov_base = state->length_hdr;
|
|
iov[0].iov_len = sizeof(state->length_hdr);
|
|
|
|
if (encryption_key != NULL) {
|
|
NTSTATUS status;
|
|
size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
|
|
uint8_t *buf;
|
|
int vi;
|
|
|
|
buf = talloc_array(iov, uint8_t, buflen);
|
|
if (buf == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
/*
|
|
* We copy the buffers before encrypting them,
|
|
* this is at least currently needed for the
|
|
* to keep state->smb2.hdr.
|
|
*
|
|
* Also the callers may expect there buffers
|
|
* to be const.
|
|
*/
|
|
for (vi = tf_iov + 1; vi < num_iov; vi++) {
|
|
struct iovec *v = &iov[vi];
|
|
const uint8_t *o = (const uint8_t *)v->iov_base;
|
|
|
|
memcpy(buf, o, v->iov_len);
|
|
v->iov_base = (void *)buf;
|
|
buf += v->iov_len;
|
|
}
|
|
|
|
status = smb2_signing_encrypt_pdu(encryption_key,
|
|
&iov[tf_iov], num_iov - tf_iov);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
if (state->conn->dispatch_incoming == NULL) {
|
|
state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
|
|
}
|
|
|
|
subreq = writev_send(state, state->ev, state->conn->outgoing,
|
|
state->conn->sock_fd, false, iov, num_iov);
|
|
if (subreq == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
|
|
state->write_req = subreq;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
state->smb2.credit_charge = charge;
|
|
}
|
|
|
|
struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint16_t cmd,
|
|
uint32_t additional_flags,
|
|
uint32_t clear_flags,
|
|
uint32_t timeout_msec,
|
|
struct smbXcli_tcon *tcon,
|
|
struct smbXcli_session *session,
|
|
const uint8_t *fixed,
|
|
uint16_t fixed_len,
|
|
const uint8_t *dyn,
|
|
uint32_t dyn_len,
|
|
uint32_t max_dyn_len)
|
|
{
|
|
struct tevent_req *req;
|
|
NTSTATUS status;
|
|
|
|
req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
|
|
additional_flags, clear_flags,
|
|
timeout_msec,
|
|
tcon, session,
|
|
fixed, fixed_len,
|
|
dyn, dyn_len,
|
|
max_dyn_len);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
status = smb2cli_req_compound_submit(&req, 1);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
return req;
|
|
}
|
|
|
|
static void smb2cli_req_writev_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
ssize_t nwritten;
|
|
int err;
|
|
|
|
state->write_req = NULL;
|
|
|
|
nwritten = writev_recv(subreq, &err);
|
|
TALLOC_FREE(subreq);
|
|
if (nwritten == -1) {
|
|
/* here, we need to notify all pending requests */
|
|
NTSTATUS status = map_nt_error_from_unix_common(err);
|
|
smbXcli_conn_disconnect(state->conn, status);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
|
|
uint64_t uid)
|
|
{
|
|
struct smbXcli_session *s = conn->sessions;
|
|
|
|
for (; s; s = s->next) {
|
|
if (s->smb2->session_id != uid) {
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
|
|
uint8_t *buf,
|
|
size_t buflen,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct iovec **piov,
|
|
size_t *pnum_iov)
|
|
{
|
|
struct iovec *iov;
|
|
int num_iov = 0;
|
|
size_t taken = 0;
|
|
uint8_t *first_hdr = buf;
|
|
size_t verified_buflen = 0;
|
|
uint8_t *tf = NULL;
|
|
size_t tf_len = 0;
|
|
|
|
iov = talloc_array(mem_ctx, struct iovec, num_iov);
|
|
if (iov == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
while (taken < buflen) {
|
|
size_t len = buflen - taken;
|
|
uint8_t *hdr = first_hdr + taken;
|
|
struct iovec *cur;
|
|
size_t full_size;
|
|
size_t next_command_ofs;
|
|
uint16_t body_size;
|
|
struct iovec *iov_tmp;
|
|
|
|
if (verified_buflen > taken) {
|
|
len = verified_buflen - taken;
|
|
} else {
|
|
tf = NULL;
|
|
tf_len = 0;
|
|
}
|
|
|
|
if (len < 4) {
|
|
DEBUG(10, ("%d bytes left, expected at least %d\n",
|
|
(int)len, 4));
|
|
goto inval;
|
|
}
|
|
if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
|
|
struct smbXcli_session *s;
|
|
uint64_t uid;
|
|
struct iovec tf_iov[2];
|
|
size_t enc_len;
|
|
NTSTATUS status;
|
|
|
|
if (len < SMB2_TF_HDR_SIZE) {
|
|
DEBUG(10, ("%d bytes left, expected at least %d\n",
|
|
(int)len, SMB2_TF_HDR_SIZE));
|
|
goto inval;
|
|
}
|
|
tf = hdr;
|
|
tf_len = SMB2_TF_HDR_SIZE;
|
|
taken += tf_len;
|
|
|
|
hdr = first_hdr + taken;
|
|
enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
|
|
uid = BVAL(tf, SMB2_TF_SESSION_ID);
|
|
|
|
if (len < SMB2_TF_HDR_SIZE + enc_len) {
|
|
DEBUG(10, ("%d bytes left, expected at least %d\n",
|
|
(int)len,
|
|
(int)(SMB2_TF_HDR_SIZE + enc_len)));
|
|
goto inval;
|
|
}
|
|
|
|
s = smbXcli_session_by_uid(conn, uid);
|
|
if (s == NULL) {
|
|
DEBUG(10, ("unknown session_id %llu\n",
|
|
(unsigned long long)uid));
|
|
goto inval;
|
|
}
|
|
|
|
tf_iov[0].iov_base = (void *)tf;
|
|
tf_iov[0].iov_len = tf_len;
|
|
tf_iov[1].iov_base = (void *)hdr;
|
|
tf_iov[1].iov_len = enc_len;
|
|
|
|
status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
|
|
tf_iov, 2);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(iov);
|
|
return status;
|
|
}
|
|
|
|
verified_buflen = taken + enc_len;
|
|
len = enc_len;
|
|
}
|
|
|
|
/*
|
|
* We need the header plus the body length field
|
|
*/
|
|
|
|
if (len < SMB2_HDR_BODY + 2) {
|
|
DEBUG(10, ("%d bytes left, expected at least %d\n",
|
|
(int)len, SMB2_HDR_BODY));
|
|
goto inval;
|
|
}
|
|
if (IVAL(hdr, 0) != SMB2_MAGIC) {
|
|
DEBUG(10, ("Got non-SMB2 PDU: %x\n",
|
|
IVAL(hdr, 0)));
|
|
goto inval;
|
|
}
|
|
if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
|
|
DEBUG(10, ("Got HDR len %d, expected %d\n",
|
|
SVAL(hdr, 4), SMB2_HDR_BODY));
|
|
goto inval;
|
|
}
|
|
|
|
full_size = len;
|
|
next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
|
|
body_size = SVAL(hdr, SMB2_HDR_BODY);
|
|
|
|
if (next_command_ofs != 0) {
|
|
if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
|
|
goto inval;
|
|
}
|
|
if (next_command_ofs > full_size) {
|
|
goto inval;
|
|
}
|
|
full_size = next_command_ofs;
|
|
}
|
|
if (body_size < 2) {
|
|
goto inval;
|
|
}
|
|
body_size &= 0xfffe;
|
|
|
|
if (body_size > (full_size - SMB2_HDR_BODY)) {
|
|
goto inval;
|
|
}
|
|
|
|
iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
|
|
num_iov + 4);
|
|
if (iov_tmp == NULL) {
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
iov = iov_tmp;
|
|
cur = &iov[num_iov];
|
|
num_iov += 4;
|
|
|
|
cur[0].iov_base = tf;
|
|
cur[0].iov_len = tf_len;
|
|
cur[1].iov_base = hdr;
|
|
cur[1].iov_len = SMB2_HDR_BODY;
|
|
cur[2].iov_base = hdr + SMB2_HDR_BODY;
|
|
cur[2].iov_len = body_size;
|
|
cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
|
|
cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
|
|
|
|
taken += full_size;
|
|
}
|
|
|
|
*piov = iov;
|
|
*pnum_iov = num_iov;
|
|
return NT_STATUS_OK;
|
|
|
|
inval:
|
|
TALLOC_FREE(iov);
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
|
|
uint64_t mid)
|
|
{
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
size_t i;
|
|
|
|
for (i=0; i<num_pending; i++) {
|
|
struct tevent_req *req = conn->pending[i];
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
|
|
return req;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *tmp_mem,
|
|
uint8_t *inbuf)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smbXcli_req_state *state = NULL;
|
|
struct iovec *iov = NULL;
|
|
size_t i, num_iov = 0;
|
|
NTSTATUS status;
|
|
bool defer = true;
|
|
struct smbXcli_session *last_session = NULL;
|
|
size_t inbuf_len = smb_len_tcp(inbuf);
|
|
|
|
status = smb2cli_inbuf_parse_compound(conn,
|
|
inbuf + NBT_HDR_SIZE,
|
|
inbuf_len,
|
|
tmp_mem,
|
|
&iov, &num_iov);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
for (i=0; i<num_iov; i+=4) {
|
|
uint8_t *inbuf_ref = NULL;
|
|
struct iovec *cur = &iov[i];
|
|
uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
|
|
uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
|
|
uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
|
|
uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
|
|
uint16_t req_opcode;
|
|
uint32_t req_flags;
|
|
uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
|
|
uint32_t new_credits;
|
|
struct smbXcli_session *session = NULL;
|
|
struct smb2_signing_key *signing_key = NULL;
|
|
bool was_encrypted = false;
|
|
|
|
new_credits = conn->smb2.cur_credits;
|
|
new_credits += credits;
|
|
if (new_credits > UINT16_MAX) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
conn->smb2.cur_credits += credits;
|
|
|
|
req = smb2cli_conn_find_pending(conn, mid);
|
|
if (req == NULL) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
state = tevent_req_data(req, struct smbXcli_req_state);
|
|
|
|
req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
|
|
if (opcode != req_opcode) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
|
|
|
|
if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
|
|
if ((flags & SMB2_HDR_FLAG_ASYNC) &&
|
|
NT_STATUS_EQUAL(status, NT_STATUS_PENDING)) {
|
|
uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
|
|
|
|
if (state->smb2.got_async) {
|
|
/* We only expect one STATUS_PENDING response */
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
state->smb2.got_async = true;
|
|
|
|
/*
|
|
* async interim responses are not signed,
|
|
* even if the SMB2_HDR_FLAG_SIGNED flag
|
|
* is set.
|
|
*/
|
|
state->smb2.cancel_flags |= SMB2_HDR_FLAG_ASYNC;
|
|
state->smb2.cancel_aid = async_id;
|
|
|
|
if (state->smb2.notify_async) {
|
|
tevent_req_defer_callback(req, state->ev);
|
|
tevent_req_notify_callback(req);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
session = state->session;
|
|
if (req_flags & SMB2_HDR_FLAG_CHAINED) {
|
|
session = last_session;
|
|
}
|
|
last_session = session;
|
|
|
|
if (flags & SMB2_HDR_FLAG_SIGNED) {
|
|
uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
|
|
|
|
if (session == NULL) {
|
|
session = smbXcli_session_by_uid(state->conn,
|
|
uid);
|
|
}
|
|
|
|
if (session == NULL) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
last_session = session;
|
|
signing_key = session->smb2_channel.signing_key;
|
|
}
|
|
|
|
if (opcode == SMB2_OP_SESSSETUP) {
|
|
/*
|
|
* We prefer the channel signing key, if it is
|
|
* already there.
|
|
*
|
|
* If we do not have a channel signing key yet,
|
|
* we try the main signing key, if it is not
|
|
* the final response.
|
|
*/
|
|
if (signing_key != NULL &&
|
|
!smb2_signing_key_valid(signing_key) &&
|
|
!NT_STATUS_IS_OK(status)) {
|
|
signing_key = session->smb2->signing_key;
|
|
}
|
|
|
|
if (signing_key != NULL &&
|
|
!smb2_signing_key_valid(signing_key)) {
|
|
/*
|
|
* If we do not have a session key to
|
|
* verify the signature, we defer the
|
|
* signing check to the caller.
|
|
*
|
|
* The caller gets NT_STATUS_OK, it
|
|
* has to call
|
|
* smb2cli_session_set_session_key()
|
|
* or
|
|
* smb2cli_session_set_channel_key()
|
|
* which will check the signature
|
|
* with the channel signing key.
|
|
*/
|
|
signing_key = NULL;
|
|
}
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
/*
|
|
* Only check the signature of the last response
|
|
* of a successful session auth. This matches
|
|
* Windows behaviour for NTLM auth and reauth.
|
|
*/
|
|
state->smb2.require_signed_response = false;
|
|
}
|
|
}
|
|
|
|
if (state->smb2.should_sign ||
|
|
state->smb2.require_signed_response)
|
|
{
|
|
if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
}
|
|
|
|
if (!smb2_signing_key_valid(signing_key) &&
|
|
state->smb2.require_signed_response) {
|
|
signing_key = session->smb2_channel.signing_key;
|
|
}
|
|
|
|
if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
|
|
const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
|
|
uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
|
|
|
|
/*
|
|
* If the response was encrypted in a SMB2_TRANSFORM
|
|
* pdu, which belongs to the correct session,
|
|
* we do not need to do signing checks
|
|
*
|
|
* It could be the session the response belongs to
|
|
* or the session that was used to encrypt the
|
|
* SMB2_TRANSFORM request.
|
|
*/
|
|
if ((session && session->smb2->session_id == uid) ||
|
|
(state->smb2.encryption_session_id == uid)) {
|
|
signing_key = NULL;
|
|
was_encrypted = true;
|
|
}
|
|
}
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
|
|
/*
|
|
* if the server returns NT_STATUS_USER_SESSION_DELETED
|
|
* the response is not signed and we should
|
|
* propagate the NT_STATUS_USER_SESSION_DELETED
|
|
* status to the caller.
|
|
*/
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_REQUEST_OUT_OF_SEQUENCE)) {
|
|
/*
|
|
* if the server returns
|
|
* NT_STATUS_REQUEST_OUT_OF_SEQUENCE for a session setup
|
|
* request, the response is not signed and we should
|
|
* propagate the NT_STATUS_REQUEST_OUT_OF_SEQUENCE
|
|
* status to the caller
|
|
*/
|
|
if (opcode == SMB2_OP_SESSSETUP) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
|
|
/*
|
|
* if the server returns NT_STATUS_NOT_SUPPORTED
|
|
* for a session setup request, the response is not
|
|
* signed and we should propagate the NT_STATUS_NOT_SUPPORTED
|
|
* status to the caller.
|
|
*/
|
|
if (opcode == SMB2_OP_SESSSETUP) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
|
|
/*
|
|
* if the server returns
|
|
* NT_STATUS_ACCESS_DENIED for a session setup
|
|
* request, the response is not signed and we should
|
|
* propagate the NT_STATUS_ACCESS_DENIED
|
|
* status to the caller without disconnecting
|
|
* the connection because we where not able to
|
|
* verify the response signature.
|
|
*/
|
|
if (opcode == SMB2_OP_SESSSETUP) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
|
|
/*
|
|
* if the server returns
|
|
* NT_STATUS_INVALID_PARAMETER
|
|
* the response might not be encrypted.
|
|
*/
|
|
if (state->smb2.should_encrypt && !was_encrypted) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
|
|
if (state->smb2.should_encrypt && !was_encrypted) {
|
|
if (!state->smb2.signing_skipped) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
}
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
|
|
NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
|
|
NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
|
|
/*
|
|
* if the server returns
|
|
* NT_STATUS_NETWORK_NAME_DELETED
|
|
* NT_STATUS_FILE_CLOSED
|
|
* NT_STATUS_INVALID_PARAMETER
|
|
* the response might not be signed
|
|
* as this happens before the signing checks.
|
|
*
|
|
* If server echos the signature (or all zeros)
|
|
* we should report the status from the server
|
|
* to the caller.
|
|
*/
|
|
if (signing_key) {
|
|
bool cmp;
|
|
|
|
cmp = mem_equal_const_time(inhdr+SMB2_HDR_SIGNATURE,
|
|
state->smb2.hdr+SMB2_HDR_SIGNATURE,
|
|
16);
|
|
if (cmp) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
if (signing_key) {
|
|
bool zero;
|
|
zero = all_zero(inhdr+SMB2_HDR_SIGNATURE, 16);
|
|
if (zero) {
|
|
state->smb2.signing_skipped = true;
|
|
signing_key = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (signing_key) {
|
|
NTSTATUS signing_status;
|
|
|
|
signing_status = smb2_signing_check_pdu(signing_key,
|
|
&cur[1], 3);
|
|
if (!NT_STATUS_IS_OK(signing_status)) {
|
|
/*
|
|
* If the signing check fails, we disconnect
|
|
* the connection.
|
|
*/
|
|
return signing_status;
|
|
}
|
|
}
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
|
|
(session != NULL) && session->disconnect_expired)
|
|
{
|
|
/*
|
|
* this should be a short term hack
|
|
* until the upper layers have implemented
|
|
* re-authentication.
|
|
*/
|
|
return status;
|
|
}
|
|
|
|
smbXcli_req_unset_pending(req);
|
|
|
|
/*
|
|
* There might be more than one response
|
|
* we need to defer the notifications
|
|
*/
|
|
if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
|
|
defer = false;
|
|
}
|
|
|
|
if (defer) {
|
|
tevent_req_defer_callback(req, state->ev);
|
|
}
|
|
|
|
/*
|
|
* Note: here we use talloc_reference() in a way
|
|
* that does not expose it to the caller.
|
|
*/
|
|
inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
|
|
if (tevent_req_nomem(inbuf_ref, req)) {
|
|
continue;
|
|
}
|
|
|
|
/* copy the related buffers */
|
|
state->smb2.recv_iov[0] = cur[1];
|
|
state->smb2.recv_iov[1] = cur[2];
|
|
state->smb2.recv_iov[2] = cur[3];
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
if (defer) {
|
|
return NT_STATUS_RETRY;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
|
|
struct iovec **piov,
|
|
const struct smb2cli_req_expected_response *expected,
|
|
size_t num_expected)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
NTSTATUS status;
|
|
size_t body_size;
|
|
bool found_status = false;
|
|
bool found_size = false;
|
|
size_t i;
|
|
|
|
if (piov != NULL) {
|
|
*piov = NULL;
|
|
}
|
|
|
|
if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
|
|
return NT_STATUS_PENDING;
|
|
}
|
|
|
|
if (tevent_req_is_nterror(req, &status)) {
|
|
for (i=0; i < num_expected; i++) {
|
|
if (NT_STATUS_EQUAL(status, expected[i].status)) {
|
|
return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
if (num_expected == 0) {
|
|
found_status = true;
|
|
found_size = true;
|
|
}
|
|
|
|
status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
|
|
body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
|
|
|
|
for (i=0; i < num_expected; i++) {
|
|
if (!NT_STATUS_EQUAL(status, expected[i].status)) {
|
|
continue;
|
|
}
|
|
|
|
found_status = true;
|
|
if (expected[i].body_size == 0) {
|
|
found_size = true;
|
|
break;
|
|
}
|
|
|
|
if (expected[i].body_size == body_size) {
|
|
found_size = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found_status) {
|
|
return status;
|
|
}
|
|
|
|
if (state->smb2.signing_skipped) {
|
|
if (num_expected > 0) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
if (!NT_STATUS_IS_ERR(status)) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
}
|
|
|
|
if (!found_size) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
if (piov != NULL) {
|
|
*piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
|
|
struct iovec *sent_iov)
|
|
{
|
|
struct smbXcli_req_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_req_state);
|
|
|
|
if (tevent_req_is_in_progress(req)) {
|
|
return NT_STATUS_PENDING;
|
|
}
|
|
|
|
sent_iov[0].iov_base = state->smb2.hdr;
|
|
sent_iov[0].iov_len = sizeof(state->smb2.hdr);
|
|
|
|
sent_iov[1].iov_base = discard_const(state->smb2.fixed);
|
|
sent_iov[1].iov_len = state->smb2.fixed_len;
|
|
|
|
if (state->smb2.dyn != NULL) {
|
|
sent_iov[2].iov_base = discard_const(state->smb2.dyn);
|
|
sent_iov[2].iov_len = state->smb2.dyn_len;
|
|
} else {
|
|
sent_iov[2].iov_base = NULL;
|
|
sent_iov[2].iov_len = 0;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
static const struct {
|
|
enum protocol_types proto;
|
|
const char *smb1_name;
|
|
} smb1cli_prots[] = {
|
|
{PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
|
|
{PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
|
|
{PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
|
|
{PROTOCOL_LANMAN1, "LANMAN1.0"},
|
|
{PROTOCOL_LANMAN2, "LM1.2X002"},
|
|
{PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
|
|
{PROTOCOL_LANMAN2, "LANMAN2.1"},
|
|
{PROTOCOL_LANMAN2, "Samba"},
|
|
{PROTOCOL_NT1, "NT LANMAN 1.0"},
|
|
{PROTOCOL_NT1, "NT LM 0.12"},
|
|
{PROTOCOL_SMB2_02, "SMB 2.002"},
|
|
{PROTOCOL_SMB2_10, "SMB 2.???"},
|
|
};
|
|
|
|
static const struct {
|
|
enum protocol_types proto;
|
|
uint16_t smb2_dialect;
|
|
} smb2cli_prots[] = {
|
|
{PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
|
|
{PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
|
|
{PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
|
|
{PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
|
|
{PROTOCOL_SMB3_11, SMB3_DIALECT_REVISION_311},
|
|
};
|
|
|
|
struct smbXcli_negprot_state {
|
|
struct smbXcli_conn *conn;
|
|
struct tevent_context *ev;
|
|
struct smb2_negotiate_contexts *in_ctx;
|
|
struct smb2_negotiate_contexts *out_ctx;
|
|
uint32_t timeout_msec;
|
|
|
|
struct {
|
|
uint8_t fixed[36];
|
|
} smb2;
|
|
};
|
|
|
|
static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
|
|
static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
|
|
static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
|
|
static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
|
|
static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
|
|
static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *frame,
|
|
uint8_t *inbuf);
|
|
|
|
struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint32_t timeout_msec,
|
|
enum protocol_types min_protocol,
|
|
enum protocol_types max_protocol,
|
|
uint16_t max_credits,
|
|
struct smb2_negotiate_contexts *in_ctx)
|
|
{
|
|
struct tevent_req *req, *subreq;
|
|
struct smbXcli_negprot_state *state;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smbXcli_negprot_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
state->conn = conn;
|
|
state->ev = ev;
|
|
state->in_ctx = in_ctx;
|
|
state->timeout_msec = timeout_msec;
|
|
|
|
if (min_protocol == PROTOCOL_NONE) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (max_protocol == PROTOCOL_NONE) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (min_protocol > max_protocol) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
conn->min_protocol = min_protocol;
|
|
conn->max_protocol = max_protocol;
|
|
conn->protocol = PROTOCOL_NONE;
|
|
|
|
if (max_protocol >= PROTOCOL_SMB2_02) {
|
|
conn->smb2.max_credits = max_credits;
|
|
}
|
|
|
|
if ((min_protocol < PROTOCOL_SMB2_02) &&
|
|
(max_protocol < PROTOCOL_SMB2_02)) {
|
|
/*
|
|
* SMB1 only...
|
|
*/
|
|
conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
|
|
|
|
subreq = smbXcli_negprot_smb1_subreq(state);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
|
|
return req;
|
|
}
|
|
|
|
if ((min_protocol >= PROTOCOL_SMB2_02) &&
|
|
(max_protocol >= PROTOCOL_SMB2_02)) {
|
|
/*
|
|
* SMB2 only...
|
|
*/
|
|
conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
|
|
|
|
subreq = smbXcli_negprot_smb2_subreq(state);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
|
|
return req;
|
|
}
|
|
|
|
/*
|
|
* We send an SMB1 negprot with the SMB2 dialects
|
|
* and expect a SMB1 or a SMB2 response.
|
|
*
|
|
* smbXcli_negprot_dispatch_incoming() will fix the
|
|
* callback to match protocol of the response.
|
|
*/
|
|
conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
|
|
|
|
subreq = smbXcli_negprot_smb1_subreq(state);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
|
|
return req;
|
|
}
|
|
|
|
static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
NTSTATUS status;
|
|
|
|
/*
|
|
* we just want the low level error
|
|
*/
|
|
status = tevent_req_simple_recv_ntstatus(subreq);
|
|
TALLOC_FREE(subreq);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
/* this should never happen */
|
|
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
|
|
}
|
|
|
|
static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
|
|
{
|
|
size_t i;
|
|
DATA_BLOB bytes = data_blob_null;
|
|
uint8_t flags;
|
|
uint16_t flags2;
|
|
|
|
/* setup the protocol strings */
|
|
for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
|
|
uint8_t c = 2;
|
|
bool ok;
|
|
|
|
if (smb1cli_prots[i].proto < state->conn->min_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb1cli_prots[i].proto > state->conn->max_protocol) {
|
|
continue;
|
|
}
|
|
|
|
ok = data_blob_append(state, &bytes, &c, sizeof(c));
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* We know it is already ascii and
|
|
* we want NULL termination.
|
|
*/
|
|
ok = data_blob_append(state, &bytes,
|
|
smb1cli_prots[i].smb1_name,
|
|
strlen(smb1cli_prots[i].smb1_name)+1);
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
smb1cli_req_flags(state->conn->max_protocol,
|
|
state->conn->smb1.client.capabilities,
|
|
SMBnegprot,
|
|
0, 0, &flags,
|
|
0, 0, &flags2);
|
|
|
|
return smb1cli_req_send(state, state->ev, state->conn,
|
|
SMBnegprot,
|
|
flags, ~flags,
|
|
flags2, ~flags2,
|
|
state->timeout_msec,
|
|
0xFFFE, 0, NULL, /* pid, tid, session */
|
|
0, NULL, /* wct, vwv */
|
|
bytes.length, bytes.data);
|
|
}
|
|
|
|
static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbXcli_negprot_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_negprot_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
struct iovec *recv_iov = NULL;
|
|
uint8_t *inhdr = NULL;
|
|
uint8_t wct;
|
|
uint16_t *vwv;
|
|
uint32_t num_bytes;
|
|
uint8_t *bytes;
|
|
NTSTATUS status;
|
|
uint16_t protnum;
|
|
size_t i;
|
|
size_t num_prots = 0;
|
|
uint8_t flags;
|
|
uint32_t client_capabilities = conn->smb1.client.capabilities;
|
|
uint32_t both_capabilities;
|
|
uint32_t server_capabilities = 0;
|
|
uint32_t capabilities;
|
|
uint32_t client_max_xmit = conn->smb1.client.max_xmit;
|
|
uint32_t server_max_xmit = 0;
|
|
uint32_t max_xmit;
|
|
uint32_t server_max_mux = 0;
|
|
uint16_t server_security_mode = 0;
|
|
uint32_t server_session_key = 0;
|
|
bool server_readbraw = false;
|
|
bool server_writebraw = false;
|
|
bool server_lockread = false;
|
|
bool server_writeunlock = false;
|
|
struct GUID server_guid = GUID_zero();
|
|
DATA_BLOB server_gss_blob = data_blob_null;
|
|
uint8_t server_challenge[8];
|
|
char *server_workgroup = NULL;
|
|
char *server_name = NULL;
|
|
int server_time_zone = 0;
|
|
NTTIME server_system_time = 0;
|
|
static const struct smb1cli_req_expected_response expected[] = {
|
|
{
|
|
.status = NT_STATUS_OK,
|
|
.wct = 0x11, /* NT1 */
|
|
},
|
|
{
|
|
.status = NT_STATUS_OK,
|
|
.wct = 0x0D, /* LM */
|
|
},
|
|
{
|
|
.status = NT_STATUS_OK,
|
|
.wct = 0x01, /* CORE */
|
|
}
|
|
};
|
|
|
|
ZERO_STRUCT(server_challenge);
|
|
|
|
status = smb1cli_req_recv(subreq, state,
|
|
&recv_iov,
|
|
&inhdr,
|
|
&wct,
|
|
&vwv,
|
|
NULL, /* pvwv_offset */
|
|
&num_bytes,
|
|
&bytes,
|
|
NULL, /* pbytes_offset */
|
|
NULL, /* pinbuf */
|
|
expected, ARRAY_SIZE(expected));
|
|
TALLOC_FREE(subreq);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
if (inhdr == NULL) {
|
|
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
|
|
return;
|
|
}
|
|
|
|
flags = CVAL(inhdr, HDR_FLG);
|
|
|
|
protnum = SVAL(vwv, 0);
|
|
|
|
for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
|
|
if (smb1cli_prots[i].proto < state->conn->min_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb1cli_prots[i].proto > state->conn->max_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (protnum != num_prots) {
|
|
num_prots++;
|
|
continue;
|
|
}
|
|
|
|
conn->protocol = smb1cli_prots[i].proto;
|
|
break;
|
|
}
|
|
|
|
if (conn->protocol == PROTOCOL_NONE) {
|
|
DBG_ERR("No compatible protocol selected by server.\n");
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
|
|
DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
|
|
"and the selected protocol level doesn't support it.\n"));
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
if (flags & FLAG_SUPPORT_LOCKREAD) {
|
|
server_lockread = true;
|
|
server_writeunlock = true;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_NT1) {
|
|
const char *client_signing = NULL;
|
|
bool server_mandatory = false;
|
|
bool server_allowed = false;
|
|
const char *server_signing = NULL;
|
|
bool ok;
|
|
uint8_t key_len;
|
|
|
|
if (wct != 0x11) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
/* NT protocol */
|
|
server_security_mode = CVAL(vwv + 1, 0);
|
|
server_max_mux = SVAL(vwv + 1, 1);
|
|
server_max_xmit = IVAL(vwv + 3, 1);
|
|
server_session_key = IVAL(vwv + 7, 1);
|
|
server_time_zone = SVALS(vwv + 15, 1);
|
|
server_time_zone *= 60;
|
|
/* this time arrives in real GMT */
|
|
server_system_time = BVAL(vwv + 11, 1);
|
|
server_capabilities = IVAL(vwv + 9, 1);
|
|
|
|
key_len = CVAL(vwv + 16, 1);
|
|
|
|
if (server_capabilities & CAP_RAW_MODE) {
|
|
server_readbraw = true;
|
|
server_writebraw = true;
|
|
}
|
|
if (server_capabilities & CAP_LOCK_AND_READ) {
|
|
server_lockread = true;
|
|
}
|
|
|
|
if (server_capabilities & CAP_EXTENDED_SECURITY) {
|
|
DATA_BLOB blob1, blob2;
|
|
|
|
if (num_bytes < 16) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
blob1 = data_blob_const(bytes, 16);
|
|
status = GUID_from_data_blob(&blob1, &server_guid);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
blob1 = data_blob_const(bytes+16, num_bytes-16);
|
|
blob2 = data_blob_dup_talloc(state, blob1);
|
|
if (blob1.length > 0 &&
|
|
tevent_req_nomem(blob2.data, req)) {
|
|
return;
|
|
}
|
|
server_gss_blob = blob2;
|
|
} else {
|
|
DATA_BLOB blob1, blob2;
|
|
|
|
if (num_bytes < key_len) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (key_len != 0 && key_len != 8) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (key_len == 8) {
|
|
memcpy(server_challenge, bytes, 8);
|
|
}
|
|
|
|
blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
|
|
blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
|
|
if (blob1.length > 0) {
|
|
size_t len;
|
|
|
|
len = utf16_null_terminated_len_n(blob1.data,
|
|
blob1.length);
|
|
blob1.length = len;
|
|
|
|
ok = convert_string_talloc(state,
|
|
CH_UTF16LE,
|
|
CH_UNIX,
|
|
blob1.data,
|
|
blob1.length,
|
|
&server_workgroup,
|
|
&len);
|
|
if (!ok) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
tevent_req_nterror(req, status);
|
|
return;
|
|
}
|
|
}
|
|
|
|
blob2.data += blob1.length;
|
|
blob2.length -= blob1.length;
|
|
if (blob2.length > 0) {
|
|
size_t len;
|
|
|
|
ok = convert_string_talloc(state,
|
|
CH_UTF16LE,
|
|
CH_UNIX,
|
|
blob2.data,
|
|
blob2.length,
|
|
&server_name,
|
|
&len);
|
|
if (!ok) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
tevent_req_nterror(req, status);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
client_signing = "disabled";
|
|
if (conn->allow_signing) {
|
|
client_signing = "allowed";
|
|
}
|
|
if (conn->mandatory_signing) {
|
|
client_signing = "required";
|
|
}
|
|
|
|
server_signing = "not supported";
|
|
if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
|
|
server_signing = "supported";
|
|
server_allowed = true;
|
|
} else if (conn->mandatory_signing) {
|
|
/*
|
|
* We have mandatory signing as client
|
|
* lets assume the server will look at our
|
|
* FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
|
|
* flag in the session setup
|
|
*/
|
|
server_signing = "not announced";
|
|
server_allowed = true;
|
|
}
|
|
if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
|
|
server_signing = "required";
|
|
server_mandatory = true;
|
|
}
|
|
|
|
ok = smb1_signing_set_negotiated(conn->smb1.signing,
|
|
server_allowed,
|
|
server_mandatory);
|
|
if (!ok) {
|
|
DEBUG(1,("cli_negprot: SMB signing is required, "
|
|
"but client[%s] and server[%s] mismatch\n",
|
|
client_signing, server_signing));
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
} else if (conn->protocol >= PROTOCOL_LANMAN1) {
|
|
DATA_BLOB blob1;
|
|
uint8_t key_len;
|
|
time_t t;
|
|
|
|
if (wct != 0x0D) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
server_security_mode = SVAL(vwv + 1, 0);
|
|
server_max_xmit = SVAL(vwv + 2, 0);
|
|
server_max_mux = SVAL(vwv + 3, 0);
|
|
server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
|
|
server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
|
|
server_session_key = IVAL(vwv + 6, 0);
|
|
server_time_zone = SVALS(vwv + 10, 0);
|
|
server_time_zone *= 60;
|
|
/* this time is converted to GMT by make_unix_date */
|
|
t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
|
|
unix_to_nt_time(&server_system_time, t);
|
|
key_len = SVAL(vwv + 11, 0);
|
|
|
|
if (num_bytes < key_len) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (key_len != 0 && key_len != 8) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (key_len == 8) {
|
|
memcpy(server_challenge, bytes, 8);
|
|
}
|
|
|
|
blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
|
|
if (blob1.length > 0) {
|
|
size_t len;
|
|
bool ok;
|
|
|
|
len = utf16_null_terminated_len_n(blob1.data,
|
|
blob1.length);
|
|
blob1.length = len;
|
|
|
|
ok = convert_string_talloc(state,
|
|
CH_DOS,
|
|
CH_UNIX,
|
|
blob1.data,
|
|
blob1.length,
|
|
&server_workgroup,
|
|
&len);
|
|
if (!ok) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
tevent_req_nterror(req, status);
|
|
return;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
/* the old core protocol */
|
|
server_time_zone = get_time_zone(time(NULL));
|
|
server_max_xmit = 1024;
|
|
server_max_mux = 1;
|
|
}
|
|
|
|
if (server_max_xmit < 1024) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (server_max_mux < 1) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Now calculate the negotiated capabilities
|
|
* based on the mask for:
|
|
* - client only flags
|
|
* - flags used in both directions
|
|
* - server only flags
|
|
*/
|
|
both_capabilities = client_capabilities & server_capabilities;
|
|
capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
|
|
capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
|
|
capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
|
|
|
|
max_xmit = MIN(client_max_xmit, server_max_xmit);
|
|
|
|
conn->smb1.server.capabilities = server_capabilities;
|
|
conn->smb1.capabilities = capabilities;
|
|
|
|
conn->smb1.server.max_xmit = server_max_xmit;
|
|
conn->smb1.max_xmit = max_xmit;
|
|
|
|
conn->smb1.server.max_mux = server_max_mux;
|
|
|
|
conn->smb1.server.security_mode = server_security_mode;
|
|
|
|
conn->smb1.server.readbraw = server_readbraw;
|
|
conn->smb1.server.writebraw = server_writebraw;
|
|
conn->smb1.server.lockread = server_lockread;
|
|
conn->smb1.server.writeunlock = server_writeunlock;
|
|
|
|
conn->smb1.server.session_key = server_session_key;
|
|
|
|
talloc_steal(conn, server_gss_blob.data);
|
|
conn->smb1.server.gss_blob = server_gss_blob;
|
|
conn->smb1.server.guid = server_guid;
|
|
memcpy(conn->smb1.server.challenge, server_challenge, 8);
|
|
conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
|
|
conn->smb1.server.name = talloc_move(conn, &server_name);
|
|
|
|
conn->smb1.server.time_zone = server_time_zone;
|
|
conn->smb1.server.system_time = server_system_time;
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
|
|
{
|
|
if ((offset & (n-1)) == 0) return 0;
|
|
return n - (offset & (n-1));
|
|
}
|
|
|
|
static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
|
|
{
|
|
size_t i;
|
|
uint8_t *buf;
|
|
uint16_t dialect_count = 0;
|
|
DATA_BLOB dyn = data_blob_null;
|
|
|
|
for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
|
|
bool ok;
|
|
uint8_t val[2];
|
|
|
|
if (smb2cli_prots[i].proto < state->conn->min_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb2cli_prots[i].proto > state->conn->max_protocol) {
|
|
continue;
|
|
}
|
|
|
|
SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
|
|
|
|
ok = data_blob_append(state, &dyn, val, sizeof(val));
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
|
|
dialect_count++;
|
|
}
|
|
|
|
buf = state->smb2.fixed;
|
|
SSVAL(buf, 0, 36);
|
|
SSVAL(buf, 2, dialect_count);
|
|
SSVAL(buf, 4, state->conn->smb2.client.security_mode);
|
|
SSVAL(buf, 6, 0); /* Reserved */
|
|
if (state->conn->max_protocol >= PROTOCOL_SMB3_00) {
|
|
SIVAL(buf, 8, state->conn->smb2.client.capabilities);
|
|
} else {
|
|
SIVAL(buf, 8, 0); /* Capabilities */
|
|
}
|
|
if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
|
|
NTSTATUS status;
|
|
struct GUID_ndr_buf guid_buf = { .buf = {0}, };
|
|
|
|
status = GUID_to_ndr_buf(&state->conn->smb2.client.guid,
|
|
&guid_buf);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
memcpy(buf+12, guid_buf.buf, 16); /* ClientGuid */
|
|
} else {
|
|
memset(buf+12, 0, 16); /* ClientGuid */
|
|
}
|
|
|
|
if (state->conn->max_protocol >= PROTOCOL_SMB3_11) {
|
|
const struct smb3_signing_capabilities *client_sign_algos =
|
|
&state->conn->smb2.client.smb3_capabilities.signing;
|
|
const struct smb3_encryption_capabilities *client_ciphers =
|
|
&state->conn->smb2.client.smb3_capabilities.encryption;
|
|
NTSTATUS status;
|
|
struct smb2_negotiate_contexts c = { .num_contexts = 0, };
|
|
uint8_t *netname_utf16 = NULL;
|
|
size_t netname_utf16_len = 0;
|
|
uint32_t offset;
|
|
DATA_BLOB b;
|
|
uint8_t p[38];
|
|
const uint8_t zeros[8] = {0, };
|
|
size_t pad;
|
|
bool ok;
|
|
|
|
SSVAL(p, 0, 1); /* HashAlgorithmCount */
|
|
SSVAL(p, 2, 32); /* SaltLength */
|
|
SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
|
|
generate_random_buffer(p + 6, 32);
|
|
|
|
status = smb2_negotiate_context_add(
|
|
state, &c, SMB2_PREAUTH_INTEGRITY_CAPABILITIES, p, 38);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (client_ciphers->num_algos > 0) {
|
|
size_t ofs = 0;
|
|
SSVAL(p, ofs, client_ciphers->num_algos);
|
|
ofs += 2;
|
|
|
|
for (i = 0; i < client_ciphers->num_algos; i++) {
|
|
size_t next_ofs = ofs + 2;
|
|
SMB_ASSERT(next_ofs < ARRAY_SIZE(p));
|
|
SSVAL(p, ofs, client_ciphers->algos[i]);
|
|
ofs = next_ofs;
|
|
}
|
|
|
|
status = smb2_negotiate_context_add(
|
|
state, &c, SMB2_ENCRYPTION_CAPABILITIES, p, ofs);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (client_sign_algos->num_algos > 0) {
|
|
size_t ofs = 0;
|
|
SSVAL(p, ofs, client_sign_algos->num_algos);
|
|
ofs += 2;
|
|
|
|
for (i = 0; i < client_sign_algos->num_algos; i++) {
|
|
size_t next_ofs = ofs + 2;
|
|
SMB_ASSERT(next_ofs < ARRAY_SIZE(p));
|
|
SSVAL(p, ofs, client_sign_algos->algos[i]);
|
|
ofs = next_ofs;
|
|
}
|
|
|
|
status = smb2_negotiate_context_add(
|
|
state, &c, SMB2_SIGNING_CAPABILITIES, p, ofs);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
ok = convert_string_talloc(state, CH_UNIX, CH_UTF16,
|
|
state->conn->remote_name,
|
|
strlen(state->conn->remote_name),
|
|
&netname_utf16, &netname_utf16_len);
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
|
|
status = smb2_negotiate_context_add(state, &c,
|
|
SMB2_NETNAME_NEGOTIATE_CONTEXT_ID,
|
|
netname_utf16, netname_utf16_len);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (state->in_ctx != NULL) {
|
|
struct smb2_negotiate_contexts *ctxs = state->in_ctx;
|
|
|
|
for (i=0; i<ctxs->num_contexts; i++) {
|
|
struct smb2_negotiate_context *ctx =
|
|
&ctxs->contexts[i];
|
|
|
|
status = smb2_negotiate_context_add(
|
|
state,
|
|
&c,
|
|
ctx->type,
|
|
ctx->data.data,
|
|
ctx->data.length);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
status = smb2_negotiate_context_push(state, &b, c);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
|
|
offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
|
|
pad = smbXcli_padding_helper(offset, 8);
|
|
|
|
ok = data_blob_append(state, &dyn, zeros, pad);
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
offset += pad;
|
|
|
|
ok = data_blob_append(state, &dyn, b.data, b.length);
|
|
if (!ok) {
|
|
return NULL;
|
|
}
|
|
|
|
SIVAL(buf, 28, offset); /* NegotiateContextOffset */
|
|
SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
|
|
SSVAL(buf, 34, 0); /* Reserved */
|
|
} else {
|
|
SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
|
|
}
|
|
|
|
return smb2cli_req_send(state, state->ev,
|
|
state->conn, SMB2_OP_NEGPROT,
|
|
0, 0, /* flags */
|
|
state->timeout_msec,
|
|
NULL, NULL, /* tcon, session */
|
|
state->smb2.fixed, sizeof(state->smb2.fixed),
|
|
dyn.data, dyn.length,
|
|
UINT16_MAX); /* max_dyn_len */
|
|
}
|
|
|
|
static NTSTATUS smbXcli_negprot_smb3_check_capabilities(struct tevent_req *req);
|
|
|
|
static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbXcli_negprot_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_negprot_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
size_t security_offset, security_length;
|
|
DATA_BLOB blob;
|
|
NTSTATUS status;
|
|
struct iovec *iov = NULL;
|
|
uint8_t *body;
|
|
size_t i;
|
|
uint16_t dialect_revision;
|
|
uint32_t negotiate_context_offset = 0;
|
|
uint16_t negotiate_context_count = 0;
|
|
DATA_BLOB negotiate_context_blob = data_blob_null;
|
|
size_t avail;
|
|
size_t ctx_ofs;
|
|
size_t needed;
|
|
struct smb2_negotiate_context *preauth = NULL;
|
|
uint16_t hash_count;
|
|
uint16_t salt_length;
|
|
uint16_t hash_selected;
|
|
gnutls_hash_hd_t hash_hnd = NULL;
|
|
struct smb2_negotiate_context *sign_algo = NULL;
|
|
struct smb2_negotiate_context *cipher = NULL;
|
|
struct smb2_negotiate_context *posix = NULL;
|
|
struct iovec sent_iov[3] = {{0}, {0}, {0}};
|
|
static const struct smb2cli_req_expected_response expected[] = {
|
|
{
|
|
.status = NT_STATUS_OK,
|
|
.body_size = 0x41
|
|
}
|
|
};
|
|
int rc;
|
|
|
|
status = smb2cli_req_recv(subreq, state, &iov,
|
|
expected, ARRAY_SIZE(expected));
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
if (iov == NULL) {
|
|
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
|
|
return;
|
|
}
|
|
|
|
body = (uint8_t *)iov[1].iov_base;
|
|
|
|
dialect_revision = SVAL(body, 4);
|
|
|
|
for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
|
|
if (smb2cli_prots[i].proto < state->conn->min_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb2cli_prots[i].proto > state->conn->max_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
|
|
continue;
|
|
}
|
|
|
|
conn->protocol = smb2cli_prots[i].proto;
|
|
break;
|
|
}
|
|
|
|
if (conn->protocol == PROTOCOL_NONE) {
|
|
TALLOC_FREE(subreq);
|
|
|
|
if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
/* make sure we do not loop forever */
|
|
state->conn->min_protocol = PROTOCOL_SMB2_02;
|
|
|
|
/*
|
|
* send a SMB2 negprot, in order to negotiate
|
|
* the SMB2 dialect.
|
|
*/
|
|
subreq = smbXcli_negprot_smb2_subreq(state);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
|
|
return;
|
|
}
|
|
|
|
conn->smb2.server.security_mode = SVAL(body, 2);
|
|
if (conn->protocol >= PROTOCOL_SMB3_11) {
|
|
negotiate_context_count = SVAL(body, 6);
|
|
}
|
|
|
|
blob = data_blob_const(body + 8, 16);
|
|
status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
conn->smb2.server.capabilities = IVAL(body, 24);
|
|
conn->smb2.server.max_trans_size= IVAL(body, 28);
|
|
conn->smb2.server.max_read_size = IVAL(body, 32);
|
|
conn->smb2.server.max_write_size= IVAL(body, 36);
|
|
conn->smb2.server.system_time = BVAL(body, 40);
|
|
conn->smb2.server.start_time = BVAL(body, 48);
|
|
|
|
if (conn->smb2.server.max_trans_size == 0 ||
|
|
conn->smb2.server.max_read_size == 0 ||
|
|
conn->smb2.server.max_write_size == 0) {
|
|
/*
|
|
* We can't connect to servers we can't
|
|
* do any operations on.
|
|
*/
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
security_offset = SVAL(body, 56);
|
|
security_length = SVAL(body, 58);
|
|
|
|
if (security_offset == 0) {
|
|
/*
|
|
* Azure sends security_offset = 0 and security_length = 0
|
|
*
|
|
* We just set security_offset to the expected value
|
|
* in order to allow the further logic to work
|
|
* as before.
|
|
*/
|
|
if (security_length != 0) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
security_offset = SMB2_HDR_BODY + iov[1].iov_len;
|
|
}
|
|
|
|
if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (security_length > iov[2].iov_len) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
conn->smb2.server.gss_blob = data_blob_talloc(conn,
|
|
iov[2].iov_base,
|
|
security_length);
|
|
if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
|
|
return;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB3_00) {
|
|
conn->smb2.server.sign_algo = SMB2_SIGNING_AES128_CMAC;
|
|
} else {
|
|
conn->smb2.server.sign_algo = SMB2_SIGNING_HMAC_SHA256;
|
|
}
|
|
|
|
if (conn->protocol < PROTOCOL_SMB3_11) {
|
|
TALLOC_FREE(subreq);
|
|
|
|
if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
|
|
conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
|
|
}
|
|
|
|
status = smbXcli_negprot_smb3_check_capabilities(req);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Here we are now at SMB3_11, so encryption should be
|
|
* negotiated via context, not capabilities.
|
|
*/
|
|
|
|
if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
|
|
/*
|
|
* Server set SMB2_CAP_ENCRYPTION capability,
|
|
* but *SHOULD* not, not *MUST* not. Just mask it off.
|
|
* NetApp seems to do this:
|
|
* BUG: https://bugzilla.samba.org/show_bug.cgi?id=13009
|
|
*/
|
|
conn->smb2.server.capabilities &= ~SMB2_CAP_ENCRYPTION;
|
|
}
|
|
|
|
negotiate_context_offset = IVAL(body, 60);
|
|
if (negotiate_context_offset < security_offset) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
ctx_ofs = negotiate_context_offset - security_offset;
|
|
if (ctx_ofs > iov[2].iov_len) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
avail = iov[2].iov_len - security_length;
|
|
needed = iov[2].iov_len - ctx_ofs;
|
|
if (needed > avail) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
|
|
negotiate_context_blob.length = iov[2].iov_len;
|
|
|
|
negotiate_context_blob.data += ctx_ofs;
|
|
negotiate_context_blob.length -= ctx_ofs;
|
|
|
|
state->out_ctx = talloc_zero(state, struct smb2_negotiate_contexts);
|
|
if (tevent_req_nomem(state->out_ctx, req)) {
|
|
return;
|
|
}
|
|
|
|
status = smb2_negotiate_context_parse(state->out_ctx,
|
|
negotiate_context_blob,
|
|
negotiate_context_count,
|
|
state->out_ctx);
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
|
|
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
preauth = smb2_negotiate_context_find(
|
|
state->out_ctx, SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
|
|
if (preauth == NULL) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (preauth->data.length < 6) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
hash_count = SVAL(preauth->data.data, 0);
|
|
salt_length = SVAL(preauth->data.data, 2);
|
|
hash_selected = SVAL(preauth->data.data, 4);
|
|
|
|
if (hash_count != 1) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (preauth->data.length != (6 + salt_length)) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
sign_algo = smb2_negotiate_context_find(
|
|
state->out_ctx, SMB2_SIGNING_CAPABILITIES);
|
|
if (sign_algo != NULL) {
|
|
const struct smb3_signing_capabilities *client_sign_algos =
|
|
&state->conn->smb2.client.smb3_capabilities.signing;
|
|
bool found_selected = false;
|
|
uint16_t sign_algo_count;
|
|
uint16_t sign_algo_selected;
|
|
|
|
if (client_sign_algos->num_algos == 0) {
|
|
/*
|
|
* We didn't ask for SMB2_ENCRYPTION_CAPABILITIES
|
|
*/
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (sign_algo->data.length < 2) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
sign_algo_count = SVAL(sign_algo->data.data, 0);
|
|
if (sign_algo_count != 1) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (sign_algo->data.length < (2 + 2 * sign_algo_count)) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
sign_algo_selected = SVAL(sign_algo->data.data, 2);
|
|
|
|
for (i = 0; i < client_sign_algos->num_algos; i++) {
|
|
if (client_sign_algos->algos[i] == sign_algo_selected) {
|
|
/*
|
|
* We found a match
|
|
*/
|
|
found_selected = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found_selected) {
|
|
/*
|
|
* The server send a sign_algo we didn't offer.
|
|
*/
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
conn->smb2.server.sign_algo = sign_algo_selected;
|
|
}
|
|
|
|
cipher = smb2_negotiate_context_find(
|
|
state->out_ctx, SMB2_ENCRYPTION_CAPABILITIES);
|
|
if (cipher != NULL) {
|
|
const struct smb3_encryption_capabilities *client_ciphers =
|
|
&state->conn->smb2.client.smb3_capabilities.encryption;
|
|
bool found_selected = false;
|
|
uint16_t cipher_count;
|
|
uint16_t cipher_selected;
|
|
|
|
if (client_ciphers->num_algos == 0) {
|
|
/*
|
|
* We didn't ask for SMB2_ENCRYPTION_CAPABILITIES
|
|
*/
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (cipher->data.length < 2) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
cipher_count = SVAL(cipher->data.data, 0);
|
|
if (cipher_count != 1) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
if (cipher->data.length < (2 + 2 * cipher_count)) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
cipher_selected = SVAL(cipher->data.data, 2);
|
|
|
|
for (i = 0; i < client_ciphers->num_algos; i++) {
|
|
if (cipher_selected == SMB2_ENCRYPTION_NONE) {
|
|
/*
|
|
* encryption not supported
|
|
*/
|
|
found_selected = true;
|
|
break;
|
|
}
|
|
if (client_ciphers->algos[i] == cipher_selected) {
|
|
/*
|
|
* We found a match
|
|
*/
|
|
found_selected = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found_selected) {
|
|
/*
|
|
* The server send a cipher we didn't offer.
|
|
*/
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
conn->smb2.server.cipher = cipher_selected;
|
|
}
|
|
|
|
posix = smb2_negotiate_context_find(
|
|
state->out_ctx, SMB2_POSIX_EXTENSIONS_AVAILABLE);
|
|
if (posix != NULL) {
|
|
DATA_BLOB posix_blob = data_blob_const(
|
|
SMB2_CREATE_TAG_POSIX, strlen(SMB2_CREATE_TAG_POSIX));
|
|
int cmp = data_blob_cmp(&posix->data, &posix_blob);
|
|
|
|
conn->smb2.server.smb311_posix = (cmp == 0);
|
|
}
|
|
|
|
|
|
/* First we hash the request */
|
|
smb2cli_req_get_sent_iov(subreq, sent_iov);
|
|
|
|
rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_SHA512);
|
|
if (rc < 0) {
|
|
tevent_req_nterror(req,
|
|
gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
|
|
return;
|
|
}
|
|
|
|
rc = gnutls_hash(hash_hnd,
|
|
conn->smb2.preauth_sha512,
|
|
sizeof(conn->smb2.preauth_sha512));
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
tevent_req_nterror(req,
|
|
gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
|
|
return;
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
rc = gnutls_hash(hash_hnd,
|
|
sent_iov[i].iov_base,
|
|
sent_iov[i].iov_len);
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
tevent_req_nterror(req,
|
|
gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* This resets the hash state */
|
|
gnutls_hash_output(hash_hnd, conn->smb2.preauth_sha512);
|
|
TALLOC_FREE(subreq);
|
|
|
|
/* And now we hash the response */
|
|
rc = gnutls_hash(hash_hnd,
|
|
conn->smb2.preauth_sha512,
|
|
sizeof(conn->smb2.preauth_sha512));
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
tevent_req_nterror(req,
|
|
gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
|
|
return;
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
rc = gnutls_hash(hash_hnd,
|
|
iov[i].iov_base,
|
|
iov[i].iov_len);
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
tevent_req_nterror(req,
|
|
gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
|
|
return;
|
|
}
|
|
}
|
|
gnutls_hash_deinit(hash_hnd, conn->smb2.preauth_sha512);
|
|
if (rc < 0) {
|
|
tevent_req_nterror(req,
|
|
NT_STATUS_UNSUCCESSFUL);
|
|
return;
|
|
}
|
|
|
|
status = smbXcli_negprot_smb3_check_capabilities(req);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static NTSTATUS smbXcli_negprot_smb3_check_capabilities(struct tevent_req *req)
|
|
{
|
|
struct smbXcli_negprot_state *state =
|
|
tevent_req_data(req,
|
|
struct smbXcli_negprot_state);
|
|
struct smbXcli_conn *conn = state->conn;
|
|
|
|
return smb311_capabilities_check(&conn->smb2.client.smb3_capabilities,
|
|
"smbXcli_negprot",
|
|
DBGLVL_ERR,
|
|
NT_STATUS_ACCESS_DENIED,
|
|
"client",
|
|
conn->protocol,
|
|
conn->smb2.server.sign_algo,
|
|
conn->smb2.server.cipher);
|
|
}
|
|
|
|
static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
|
|
TALLOC_CTX *tmp_mem,
|
|
uint8_t *inbuf)
|
|
{
|
|
size_t num_pending = talloc_array_length(conn->pending);
|
|
struct tevent_req *subreq;
|
|
struct smbXcli_req_state *substate;
|
|
struct tevent_req *req;
|
|
uint32_t protocol_magic;
|
|
size_t inbuf_len = smb_len_nbt(inbuf);
|
|
|
|
if (num_pending != 1) {
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (inbuf_len < 4) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
subreq = conn->pending[0];
|
|
substate = tevent_req_data(subreq, struct smbXcli_req_state);
|
|
req = tevent_req_callback_data(subreq, struct tevent_req);
|
|
|
|
protocol_magic = IVAL(inbuf, 4);
|
|
|
|
switch (protocol_magic) {
|
|
case SMB_MAGIC:
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
|
|
conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
|
|
return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
|
|
|
|
case SMB2_MAGIC:
|
|
if (substate->smb2.recv_iov == NULL) {
|
|
/*
|
|
* For the SMB1 negprot we have move it.
|
|
*/
|
|
substate->smb2.recv_iov = substate->smb1.recv_iov;
|
|
substate->smb1.recv_iov = NULL;
|
|
}
|
|
|
|
/*
|
|
* we got an SMB2 answer, which consumed sequence number 0
|
|
* so we need to use 1 as the next one.
|
|
*
|
|
* we also need to set the current credits to 0
|
|
* as we consumed the initial one. The SMB2 answer
|
|
* hopefully grant us a new credit.
|
|
*/
|
|
conn->smb2.mid = 1;
|
|
conn->smb2.cur_credits = 0;
|
|
tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
|
|
conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
|
|
return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
|
|
}
|
|
|
|
DEBUG(10, ("Got non-SMB PDU\n"));
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
NTSTATUS smbXcli_negprot_recv(
|
|
struct tevent_req *req,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct smb2_negotiate_contexts **out_ctx)
|
|
{
|
|
struct smbXcli_negprot_state *state = tevent_req_data(
|
|
req, struct smbXcli_negprot_state);
|
|
NTSTATUS status;
|
|
|
|
if (tevent_req_is_nterror(req, &status)) {
|
|
tevent_req_received(req);
|
|
return status;
|
|
}
|
|
|
|
if (out_ctx != NULL) {
|
|
*out_ctx = talloc_move(mem_ctx, &state->out_ctx);
|
|
}
|
|
|
|
tevent_req_received(req);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
|
|
uint32_t timeout_msec,
|
|
enum protocol_types min_protocol,
|
|
enum protocol_types max_protocol,
|
|
struct smb2_negotiate_contexts *in_ctx,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct smb2_negotiate_contexts **out_ctx)
|
|
{
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
struct tevent_context *ev;
|
|
struct tevent_req *req;
|
|
NTSTATUS status = NT_STATUS_NO_MEMORY;
|
|
bool ok;
|
|
|
|
if (smbXcli_conn_has_async_calls(conn)) {
|
|
/*
|
|
* Can't use sync call while an async call is in flight
|
|
*/
|
|
status = NT_STATUS_INVALID_PARAMETER_MIX;
|
|
goto fail;
|
|
}
|
|
ev = samba_tevent_context_init(frame);
|
|
if (ev == NULL) {
|
|
goto fail;
|
|
}
|
|
req = smbXcli_negprot_send(
|
|
frame,
|
|
ev,
|
|
conn,
|
|
timeout_msec,
|
|
min_protocol,
|
|
max_protocol,
|
|
WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK,
|
|
in_ctx);
|
|
if (req == NULL) {
|
|
goto fail;
|
|
}
|
|
ok = tevent_req_poll_ntstatus(req, ev, &status);
|
|
if (!ok) {
|
|
goto fail;
|
|
}
|
|
status = smbXcli_negprot_recv(req, mem_ctx, out_ctx);
|
|
fail:
|
|
TALLOC_FREE(frame);
|
|
return status;
|
|
}
|
|
|
|
struct smb2cli_validate_negotiate_info_state {
|
|
struct smbXcli_conn *conn;
|
|
DATA_BLOB in_input_buffer;
|
|
DATA_BLOB in_output_buffer;
|
|
DATA_BLOB out_input_buffer;
|
|
DATA_BLOB out_output_buffer;
|
|
uint16_t dialect;
|
|
};
|
|
|
|
static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
|
|
|
|
struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbXcli_conn *conn,
|
|
uint32_t timeout_msec,
|
|
struct smbXcli_session *session,
|
|
struct smbXcli_tcon *tcon)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smb2cli_validate_negotiate_info_state *state;
|
|
uint8_t *buf;
|
|
uint16_t dialect_count = 0;
|
|
struct tevent_req *subreq;
|
|
bool _save_should_sign;
|
|
size_t i;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smb2cli_validate_negotiate_info_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
state->conn = conn;
|
|
|
|
state->in_input_buffer = data_blob_talloc_zero(state,
|
|
4 + 16 + 1 + 1 + 2);
|
|
if (tevent_req_nomem(state->in_input_buffer.data, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
buf = state->in_input_buffer.data;
|
|
|
|
if (state->conn->max_protocol >= PROTOCOL_SMB3_00) {
|
|
SIVAL(buf, 0, conn->smb2.client.capabilities);
|
|
} else {
|
|
SIVAL(buf, 0, 0); /* Capabilities */
|
|
}
|
|
if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
|
|
NTSTATUS status;
|
|
struct GUID_ndr_buf guid_buf = { .buf = {0}, };
|
|
|
|
status = GUID_to_ndr_buf(&conn->smb2.client.guid,
|
|
&guid_buf);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return NULL;
|
|
}
|
|
memcpy(buf+4, guid_buf.buf, 16); /* ClientGuid */
|
|
} else {
|
|
memset(buf+4, 0, 16); /* ClientGuid */
|
|
}
|
|
if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
|
|
SCVAL(buf, 20, conn->smb2.client.security_mode);
|
|
} else {
|
|
SCVAL(buf, 20, 0);
|
|
}
|
|
SCVAL(buf, 21, 0); /* reserved */
|
|
|
|
for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
|
|
bool ok;
|
|
size_t ofs;
|
|
|
|
if (smb2cli_prots[i].proto < state->conn->min_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb2cli_prots[i].proto > state->conn->max_protocol) {
|
|
continue;
|
|
}
|
|
|
|
if (smb2cli_prots[i].proto == state->conn->protocol) {
|
|
state->dialect = smb2cli_prots[i].smb2_dialect;
|
|
}
|
|
|
|
ofs = state->in_input_buffer.length;
|
|
ok = data_blob_realloc(state, &state->in_input_buffer,
|
|
ofs + 2);
|
|
if (!ok) {
|
|
tevent_req_oom(req);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
buf = state->in_input_buffer.data;
|
|
SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
|
|
|
|
dialect_count++;
|
|
}
|
|
buf = state->in_input_buffer.data;
|
|
SSVAL(buf, 22, dialect_count);
|
|
|
|
_save_should_sign = smb2cli_tcon_is_signing_on(tcon);
|
|
smb2cli_tcon_should_sign(tcon, true);
|
|
subreq = smb2cli_ioctl_send(state, ev, conn,
|
|
timeout_msec, session, tcon,
|
|
UINT64_MAX, /* in_fid_persistent */
|
|
UINT64_MAX, /* in_fid_volatile */
|
|
FSCTL_VALIDATE_NEGOTIATE_INFO,
|
|
0, /* in_max_input_length */
|
|
&state->in_input_buffer,
|
|
24, /* in_max_output_length */
|
|
&state->in_output_buffer,
|
|
SMB2_IOCTL_FLAG_IS_FSCTL);
|
|
smb2cli_tcon_should_sign(tcon, _save_should_sign);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(subreq,
|
|
smb2cli_validate_negotiate_info_done,
|
|
req);
|
|
|
|
return req;
|
|
}
|
|
|
|
static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req =
|
|
tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smb2cli_validate_negotiate_info_state *state =
|
|
tevent_req_data(req,
|
|
struct smb2cli_validate_negotiate_info_state);
|
|
NTSTATUS status;
|
|
const uint8_t *buf;
|
|
uint32_t capabilities;
|
|
DATA_BLOB guid_blob;
|
|
struct GUID server_guid;
|
|
uint16_t security_mode;
|
|
uint16_t dialect;
|
|
|
|
status = smb2cli_ioctl_recv(subreq, state,
|
|
&state->out_input_buffer,
|
|
&state->out_output_buffer);
|
|
TALLOC_FREE(subreq);
|
|
|
|
/*
|
|
* This response must be signed correctly for
|
|
* these "normal" error codes to be processed.
|
|
* If the packet wasn't signed correctly we will get
|
|
* NT_STATUS_ACCESS_DENIED or NT_STATUS_HMAC_NOT_SUPPORTED,
|
|
* or NT_STATUS_INVALID_NETWORK_RESPONSE
|
|
* from smb2_signing_check_pdu().
|
|
*
|
|
* We must never ignore the above errors here.
|
|
*/
|
|
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
|
|
/*
|
|
* The response was signed, but not supported
|
|
*
|
|
* Older Windows and Samba releases return
|
|
* NT_STATUS_FILE_CLOSED.
|
|
*/
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
|
|
/*
|
|
* The response was signed, but not supported
|
|
*
|
|
* This is returned by the NTVFS based Samba 4.x file server
|
|
* for file shares.
|
|
*/
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
|
|
/*
|
|
* The response was signed, but not supported
|
|
*
|
|
* This is returned by the NTVFS based Samba 4.x file server
|
|
* for ipc shares.
|
|
*/
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
|
|
/*
|
|
* The response was signed, but not supported
|
|
*
|
|
* This might be returned by older Windows versions or by
|
|
* NetApp SMB server implementations.
|
|
*
|
|
* See
|
|
*
|
|
* https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
|
|
*
|
|
*/
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
|
|
/*
|
|
* The response was signed, but not supported
|
|
*
|
|
* This might be returned by NetApp Ontap 7.3.7 SMB server
|
|
* implementations.
|
|
*
|
|
* BUG: https://bugzilla.samba.org/show_bug.cgi?id=14607
|
|
*
|
|
*/
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
|
|
if (state->out_output_buffer.length != 24) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
|
|
return;
|
|
}
|
|
|
|
buf = state->out_output_buffer.data;
|
|
|
|
capabilities = IVAL(buf, 0);
|
|
guid_blob = data_blob_const(buf + 4, 16);
|
|
status = GUID_from_data_blob(&guid_blob, &server_guid);
|
|
if (tevent_req_nterror(req, status)) {
|
|
return;
|
|
}
|
|
security_mode = CVAL(buf, 20);
|
|
dialect = SVAL(buf, 22);
|
|
|
|
if (capabilities != state->conn->smb2.server.capabilities) {
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
if (security_mode != state->conn->smb2.server.security_mode) {
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
if (dialect != state->dialect) {
|
|
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
|
|
{
|
|
return tevent_req_simple_recv_ntstatus(req);
|
|
}
|
|
|
|
static int smbXcli_session_destructor(struct smbXcli_session *session)
|
|
{
|
|
if (session->conn == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
DLIST_REMOVE(session->conn->sessions, session);
|
|
return 0;
|
|
}
|
|
|
|
struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
|
|
struct smbXcli_conn *conn)
|
|
{
|
|
struct smbXcli_session *session;
|
|
NTSTATUS status;
|
|
|
|
session = talloc_zero(mem_ctx, struct smbXcli_session);
|
|
if (session == NULL) {
|
|
return NULL;
|
|
}
|
|
session->smb2 = talloc_zero(session, struct smb2cli_session);
|
|
if (session->smb2 == NULL) {
|
|
talloc_free(session);
|
|
return NULL;
|
|
}
|
|
talloc_set_destructor(session, smbXcli_session_destructor);
|
|
|
|
status = smb2_signing_key_sign_create(session->smb2,
|
|
conn->smb2.server.sign_algo,
|
|
NULL, /* no master key */
|
|
NULL, /* derivations */
|
|
&session->smb2->signing_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(session);
|
|
return NULL;
|
|
}
|
|
|
|
DLIST_ADD_END(conn->sessions, session);
|
|
session->conn = conn;
|
|
|
|
status = smb2_signing_key_sign_create(session,
|
|
conn->smb2.server.sign_algo,
|
|
NULL, /* no master key */
|
|
NULL, /* derivations */
|
|
&session->smb2_channel.signing_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(session);
|
|
return NULL;
|
|
}
|
|
|
|
memcpy(session->smb2_channel.preauth_sha512,
|
|
conn->smb2.preauth_sha512,
|
|
sizeof(session->smb2_channel.preauth_sha512));
|
|
|
|
return session;
|
|
}
|
|
|
|
struct smbXcli_session *smbXcli_session_shallow_copy(TALLOC_CTX *mem_ctx,
|
|
struct smbXcli_session *src)
|
|
{
|
|
struct smbXcli_session *session;
|
|
struct timespec ts;
|
|
NTTIME nt;
|
|
|
|
session = talloc_zero(mem_ctx, struct smbXcli_session);
|
|
if (session == NULL) {
|
|
return NULL;
|
|
}
|
|
session->smb2 = talloc_zero(session, struct smb2cli_session);
|
|
if (session->smb2 == NULL) {
|
|
talloc_free(session);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Note we keep a pointer to the session keys of the
|
|
* main session and rely on the caller to free the
|
|
* shallow copy first!
|
|
*/
|
|
session->conn = src->conn;
|
|
*session->smb2 = *src->smb2;
|
|
session->smb2_channel = src->smb2_channel;
|
|
session->disconnect_expired = src->disconnect_expired;
|
|
|
|
/*
|
|
* This is only supposed to be called in test code
|
|
* but we should not reuse nonces!
|
|
*
|
|
* Add the current timestamp as NTTIME to nonce_high
|
|
* and set nonce_low to a value we can recognize in captures.
|
|
*/
|
|
clock_gettime_mono(&ts);
|
|
nt = unix_timespec_to_nt_time(ts);
|
|
nt &= session->smb2->nonce_high_max;
|
|
if (nt == session->smb2->nonce_high_max || nt < UINT8_MAX) {
|
|
talloc_free(session);
|
|
return NULL;
|
|
}
|
|
session->smb2->nonce_high += nt;
|
|
session->smb2->nonce_low = UINT32_MAX;
|
|
|
|
DLIST_ADD_END(src->conn->sessions, session);
|
|
talloc_set_destructor(session, smbXcli_session_destructor);
|
|
|
|
return session;
|
|
}
|
|
|
|
bool smbXcli_session_is_guest(struct smbXcli_session *session)
|
|
{
|
|
if (session == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (session->conn == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (session->conn->mandatory_signing) {
|
|
return false;
|
|
}
|
|
|
|
if (session->conn->protocol >= PROTOCOL_SMB2_02) {
|
|
if (session->smb2->session_flags & SMB2_SESSION_FLAG_IS_GUEST) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (session->smb1.action & SMB_SETUP_GUEST) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
|
|
{
|
|
const DATA_BLOB *application_key;
|
|
|
|
if (session == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (session->conn == NULL) {
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* If we have an application key we had a session key negotiated
|
|
* at auth time.
|
|
*/
|
|
if (session->conn->protocol >= PROTOCOL_SMB2_02) {
|
|
if (!smb2_signing_key_valid(session->smb2->application_key)) {
|
|
return false;
|
|
}
|
|
application_key = &session->smb2->application_key->blob;
|
|
} else {
|
|
application_key = &session->smb1.application_key;
|
|
}
|
|
|
|
if (application_key->length == 0) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_signing_key(struct smbXcli_session *session,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *key)
|
|
{
|
|
const struct smb2_signing_key *sig = NULL;
|
|
|
|
if (session->conn == NULL) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
/*
|
|
* Use channel signing key if there is one, otherwise fallback
|
|
* to session.
|
|
*/
|
|
|
|
if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
sig = session->smb2_channel.signing_key;
|
|
} else if (smb2_signing_key_valid(session->smb2->signing_key)) {
|
|
sig = session->smb2->signing_key;
|
|
} else {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
*key = data_blob_dup_talloc(mem_ctx, sig->blob);
|
|
if (key->data == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_encryption_key(struct smbXcli_session *session,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *key)
|
|
{
|
|
if (session->conn == NULL) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
if (session->conn->protocol < PROTOCOL_SMB3_00) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
if (!smb2_signing_key_valid(session->smb2->encryption_key)) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
*key = data_blob_dup_talloc(mem_ctx, session->smb2->encryption_key->blob);
|
|
if (key->data == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_decryption_key(struct smbXcli_session *session,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *key)
|
|
{
|
|
if (session->conn == NULL) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
if (session->conn->protocol < PROTOCOL_SMB3_00) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
if (!smb2_signing_key_valid(session->smb2->decryption_key)) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
*key = data_blob_dup_talloc(mem_ctx, session->smb2->decryption_key->blob);
|
|
if (key->data == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *key)
|
|
{
|
|
const DATA_BLOB *application_key;
|
|
|
|
*key = data_blob_null;
|
|
|
|
if (session->conn == NULL) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
if (session->conn->protocol >= PROTOCOL_SMB2_02) {
|
|
if (!smb2_signing_key_valid(session->smb2->application_key)) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
application_key = &session->smb2->application_key->blob;
|
|
} else {
|
|
application_key = &session->smb1.application_key;
|
|
}
|
|
|
|
if (application_key->length == 0) {
|
|
return NT_STATUS_NO_USER_SESSION_KEY;
|
|
}
|
|
|
|
*key = data_blob_dup_talloc(mem_ctx, *application_key);
|
|
if (key->data == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
|
|
{
|
|
session->disconnect_expired = true;
|
|
}
|
|
|
|
uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
|
|
{
|
|
return session->smb1.session_id;
|
|
}
|
|
|
|
void smb1cli_session_set_id(struct smbXcli_session *session,
|
|
uint16_t session_id)
|
|
{
|
|
session->smb1.session_id = session_id;
|
|
}
|
|
|
|
void smb1cli_session_set_action(struct smbXcli_session *session,
|
|
uint16_t action)
|
|
{
|
|
session->smb1.action = action;
|
|
}
|
|
|
|
NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
|
|
const DATA_BLOB _session_key)
|
|
{
|
|
struct smbXcli_conn *conn = session->conn;
|
|
uint8_t session_key[16];
|
|
|
|
if (conn == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (session->smb1.application_key.length != 0) {
|
|
/*
|
|
* TODO: do not allow this...
|
|
*
|
|
* return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
*/
|
|
data_blob_clear_free(&session->smb1.application_key);
|
|
session->smb1.protected_key = false;
|
|
}
|
|
|
|
if (_session_key.length == 0) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
ZERO_STRUCT(session_key);
|
|
memcpy(session_key, _session_key.data,
|
|
MIN(_session_key.length, sizeof(session_key)));
|
|
|
|
session->smb1.application_key = data_blob_talloc(session,
|
|
session_key,
|
|
sizeof(session_key));
|
|
ZERO_STRUCT(session_key);
|
|
if (session->smb1.application_key.data == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
session->smb1.protected_key = false;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
if (session->smb1.protected_key) {
|
|
/* already protected */
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (session->smb1.application_key.length != 16) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
status = smb1_key_derivation(session->smb1.application_key.data,
|
|
session->smb1.application_key.length,
|
|
session->smb1.application_key.data);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
session->smb1.protected_key = true;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
|
|
{
|
|
struct smbXcli_conn *conn = session->conn;
|
|
uint8_t security_mode = 0;
|
|
|
|
if (conn == NULL) {
|
|
return security_mode;
|
|
}
|
|
|
|
security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
|
|
if (conn->mandatory_signing) {
|
|
security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
|
|
}
|
|
if (session->smb2->should_sign) {
|
|
security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
|
|
}
|
|
|
|
return security_mode;
|
|
}
|
|
|
|
uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
|
|
{
|
|
return session->smb2->session_id;
|
|
}
|
|
|
|
uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
|
|
{
|
|
return session->smb2->session_flags;
|
|
}
|
|
|
|
void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
|
|
uint64_t session_id,
|
|
uint16_t session_flags)
|
|
{
|
|
session->smb2->session_id = session_id;
|
|
session->smb2->session_flags = session_flags;
|
|
}
|
|
|
|
void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
|
|
{
|
|
session->smb2->channel_sequence += 1;
|
|
}
|
|
|
|
uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
|
|
uint16_t channel_sequence)
|
|
{
|
|
uint16_t prev_cs;
|
|
|
|
prev_cs = session->smb2->channel_sequence;
|
|
session->smb2->channel_sequence = channel_sequence;
|
|
|
|
return prev_cs;
|
|
}
|
|
|
|
uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
|
|
{
|
|
return session->smb2->channel_sequence;
|
|
}
|
|
|
|
void smb2cli_session_start_replay(struct smbXcli_session *session)
|
|
{
|
|
session->smb2->replay_active = true;
|
|
}
|
|
|
|
void smb2cli_session_stop_replay(struct smbXcli_session *session)
|
|
{
|
|
session->smb2->replay_active = false;
|
|
}
|
|
|
|
void smb2cli_session_require_signed_response(struct smbXcli_session *session,
|
|
bool require_signed_response)
|
|
{
|
|
session->smb2->require_signed_response = require_signed_response;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
|
|
const struct iovec *iov)
|
|
{
|
|
gnutls_hash_hd_t hash_hnd = NULL;
|
|
size_t i;
|
|
int rc;
|
|
|
|
if (session->conn == NULL) {
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (session->conn->protocol < PROTOCOL_SMB3_11) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
rc = gnutls_hash_init(&hash_hnd,
|
|
GNUTLS_DIG_SHA512);
|
|
if (rc < 0) {
|
|
return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
|
|
}
|
|
|
|
rc = gnutls_hash(hash_hnd,
|
|
session->smb2_channel.preauth_sha512,
|
|
sizeof(session->smb2_channel.preauth_sha512));
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
rc = gnutls_hash(hash_hnd,
|
|
iov[i].iov_base,
|
|
iov[i].iov_len);
|
|
if (rc < 0) {
|
|
gnutls_hash_deinit(hash_hnd, NULL);
|
|
return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
|
|
}
|
|
}
|
|
gnutls_hash_deinit(hash_hnd, session->smb2_channel.preauth_sha512);
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
|
|
const DATA_BLOB _session_key,
|
|
const struct iovec *recv_iov)
|
|
{
|
|
struct smbXcli_conn *conn = session->conn;
|
|
uint16_t no_sign_flags = 0;
|
|
bool check_signature = true;
|
|
uint32_t hdr_flags;
|
|
NTSTATUS status;
|
|
struct smb2_signing_derivations derivations = {
|
|
.signing = NULL,
|
|
};
|
|
DATA_BLOB preauth_hash = data_blob_null;
|
|
size_t nonce_size = 0;
|
|
|
|
if (conn == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (!conn->mandatory_signing) {
|
|
/*
|
|
* only allow guest sessions without
|
|
* mandatory signing.
|
|
*
|
|
* If we try an authentication with username != ""
|
|
* and the server let us in without verifying the
|
|
* password we don't have a negotiated session key
|
|
* for signing.
|
|
*/
|
|
no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST;
|
|
}
|
|
|
|
if (session->smb2->session_flags & no_sign_flags) {
|
|
session->smb2->should_sign = false;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (smb2_signing_key_valid(session->smb2->signing_key)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB3_11) {
|
|
preauth_hash = data_blob_const(session->smb2_channel.preauth_sha512,
|
|
sizeof(session->smb2_channel.preauth_sha512));
|
|
}
|
|
|
|
smb2_signing_derivations_fill_const_stack(&derivations,
|
|
conn->protocol,
|
|
preauth_hash);
|
|
|
|
status = smb2_signing_key_sign_create(session->smb2,
|
|
conn->smb2.server.sign_algo,
|
|
&_session_key,
|
|
derivations.signing,
|
|
&session->smb2->signing_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = smb2_signing_key_cipher_create(session->smb2,
|
|
conn->smb2.server.cipher,
|
|
&_session_key,
|
|
derivations.cipher_c2s,
|
|
&session->smb2->encryption_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = smb2_signing_key_cipher_create(session->smb2,
|
|
conn->smb2.server.cipher,
|
|
&_session_key,
|
|
derivations.cipher_s2c,
|
|
&session->smb2->decryption_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = smb2_signing_key_sign_create(session->smb2,
|
|
conn->smb2.server.sign_algo,
|
|
&_session_key,
|
|
derivations.application,
|
|
&session->smb2->application_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = smb2_signing_key_copy(session,
|
|
session->smb2->signing_key,
|
|
&session->smb2_channel.signing_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
check_signature = conn->mandatory_signing;
|
|
|
|
hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
|
|
if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
|
|
/*
|
|
* Sadly some vendors don't sign the
|
|
* final SMB2 session setup response
|
|
*
|
|
* At least Windows and Samba are always doing this
|
|
* if there's a session key available.
|
|
*
|
|
* We only check the signature if it's mandatory
|
|
* or SMB2_HDR_FLAG_SIGNED is provided.
|
|
*/
|
|
check_signature = true;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB3_11) {
|
|
check_signature = true;
|
|
}
|
|
|
|
if (check_signature) {
|
|
status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
|
|
recv_iov, 3);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
session->smb2->should_sign = false;
|
|
session->smb2->should_encrypt = false;
|
|
|
|
if (conn->desire_signing) {
|
|
session->smb2->should_sign = true;
|
|
}
|
|
|
|
if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
|
|
session->smb2->should_sign = true;
|
|
}
|
|
|
|
if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
|
|
session->smb2->should_encrypt = true;
|
|
}
|
|
|
|
if (conn->protocol < PROTOCOL_SMB3_00) {
|
|
session->smb2->should_encrypt = false;
|
|
}
|
|
|
|
if (conn->smb2.server.cipher == 0) {
|
|
session->smb2->should_encrypt = false;
|
|
}
|
|
|
|
/*
|
|
* CCM and GCM algorithms must never have their
|
|
* nonce wrap, or the security of the whole
|
|
* communication and the keys is destroyed.
|
|
* We must drop the connection once we have
|
|
* transferred too much data.
|
|
*
|
|
* NOTE: We assume nonces greater than 8 bytes.
|
|
*/
|
|
generate_nonce_buffer((uint8_t *)&session->smb2->nonce_high_random,
|
|
sizeof(session->smb2->nonce_high_random));
|
|
switch (conn->smb2.server.cipher) {
|
|
case SMB2_ENCRYPTION_AES128_CCM:
|
|
nonce_size = SMB2_AES_128_CCM_NONCE_SIZE;
|
|
break;
|
|
case SMB2_ENCRYPTION_AES128_GCM:
|
|
nonce_size = gnutls_cipher_get_iv_size(GNUTLS_CIPHER_AES_128_GCM);
|
|
break;
|
|
case SMB2_ENCRYPTION_AES256_CCM:
|
|
nonce_size = SMB2_AES_128_CCM_NONCE_SIZE;
|
|
break;
|
|
case SMB2_ENCRYPTION_AES256_GCM:
|
|
nonce_size = gnutls_cipher_get_iv_size(GNUTLS_CIPHER_AES_256_GCM);
|
|
break;
|
|
default:
|
|
nonce_size = 0;
|
|
break;
|
|
}
|
|
session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
|
|
session->smb2->nonce_high = 0;
|
|
session->smb2->nonce_low = 0;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
|
|
struct smbXcli_session *session1,
|
|
struct smbXcli_conn *conn,
|
|
struct smbXcli_session **_session2)
|
|
{
|
|
struct smbXcli_session *session2;
|
|
NTSTATUS status;
|
|
|
|
if (!smb2_signing_key_valid(session1->smb2->signing_key)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (conn == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
session2 = talloc_zero(mem_ctx, struct smbXcli_session);
|
|
if (session2 == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
session2->smb2 = talloc_reference(session2, session1->smb2);
|
|
if (session2->smb2 == NULL) {
|
|
talloc_free(session2);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
talloc_set_destructor(session2, smbXcli_session_destructor);
|
|
DLIST_ADD_END(conn->sessions, session2);
|
|
session2->conn = conn;
|
|
|
|
status = smb2_signing_key_sign_create(session2,
|
|
conn->smb2.server.sign_algo,
|
|
NULL, /* no master key */
|
|
NULL, /* derivations */
|
|
&session2->smb2_channel.signing_key);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(session2);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
memcpy(session2->smb2_channel.preauth_sha512,
|
|
conn->smb2.preauth_sha512,
|
|
sizeof(session2->smb2_channel.preauth_sha512));
|
|
|
|
*_session2 = session2;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
|
|
const DATA_BLOB _channel_key,
|
|
const struct iovec *recv_iov)
|
|
{
|
|
struct smbXcli_conn *conn = session->conn;
|
|
uint8_t channel_key[16];
|
|
NTSTATUS status;
|
|
struct _derivation {
|
|
DATA_BLOB label;
|
|
DATA_BLOB context;
|
|
};
|
|
struct {
|
|
struct _derivation signing;
|
|
} derivation = {
|
|
.signing.label.length = 0,
|
|
};
|
|
|
|
if (conn == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB3_11) {
|
|
struct _derivation *d;
|
|
DATA_BLOB p;
|
|
|
|
p = data_blob_const(session->smb2_channel.preauth_sha512,
|
|
sizeof(session->smb2_channel.preauth_sha512));
|
|
|
|
d = &derivation.signing;
|
|
d->label = data_blob_string_const_null("SMBSigningKey");
|
|
d->context = p;
|
|
} else if (conn->protocol >= PROTOCOL_SMB3_00) {
|
|
struct _derivation *d;
|
|
|
|
d = &derivation.signing;
|
|
d->label = data_blob_string_const_null("SMB2AESCMAC");
|
|
d->context = data_blob_string_const_null("SmbSign");
|
|
}
|
|
|
|
ZERO_STRUCT(channel_key);
|
|
memcpy(channel_key, _channel_key.data,
|
|
MIN(_channel_key.length, sizeof(channel_key)));
|
|
|
|
session->smb2_channel.signing_key->blob =
|
|
data_blob_talloc(session->smb2_channel.signing_key,
|
|
channel_key,
|
|
sizeof(channel_key));
|
|
if (!smb2_signing_key_valid(session->smb2_channel.signing_key)) {
|
|
ZERO_STRUCT(channel_key);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if (conn->protocol >= PROTOCOL_SMB3_00) {
|
|
struct _derivation *d = &derivation.signing;
|
|
|
|
status = samba_gnutls_sp800_108_derive_key(
|
|
channel_key,
|
|
sizeof(channel_key),
|
|
NULL,
|
|
0,
|
|
d->label.data,
|
|
d->label.length,
|
|
d->context.data,
|
|
d->context.length,
|
|
GNUTLS_MAC_SHA256,
|
|
session->smb2_channel.signing_key->blob.data,
|
|
session->smb2_channel.signing_key->blob.length);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
ZERO_STRUCT(channel_key);
|
|
|
|
status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
|
|
recv_iov, 3);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
|
|
{
|
|
if (!session->smb2->should_sign) {
|
|
/*
|
|
* We need required signing on the session
|
|
* in order to prevent man in the middle attacks.
|
|
*/
|
|
return NT_STATUS_INVALID_PARAMETER_MIX;
|
|
}
|
|
|
|
if (session->smb2->should_encrypt) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (session->conn->protocol < PROTOCOL_SMB3_00) {
|
|
return NT_STATUS_NOT_SUPPORTED;
|
|
}
|
|
|
|
if (session->conn->smb2.server.cipher == 0) {
|
|
return NT_STATUS_NOT_SUPPORTED;
|
|
}
|
|
|
|
if (!smb2_signing_key_valid(session->smb2->signing_key)) {
|
|
return NT_STATUS_NOT_SUPPORTED;
|
|
}
|
|
session->smb2->should_encrypt = true;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
uint16_t smb2cli_session_get_encryption_cipher(struct smbXcli_session *session)
|
|
{
|
|
if (session->conn->protocol < PROTOCOL_SMB3_00) {
|
|
return 0;
|
|
}
|
|
|
|
if (!session->smb2->should_encrypt) {
|
|
return 0;
|
|
}
|
|
|
|
return session->conn->smb2.server.cipher;
|
|
}
|
|
|
|
struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
|
|
{
|
|
struct smbXcli_tcon *tcon;
|
|
|
|
tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
|
|
if (tcon == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
return tcon;
|
|
}
|
|
|
|
/*
|
|
* Return a deep structure copy of a struct smbXcli_tcon *
|
|
*/
|
|
|
|
struct smbXcli_tcon *smbXcli_tcon_copy(TALLOC_CTX *mem_ctx,
|
|
const struct smbXcli_tcon *tcon_in)
|
|
{
|
|
struct smbXcli_tcon *tcon;
|
|
|
|
tcon = talloc_memdup(mem_ctx, tcon_in, sizeof(struct smbXcli_tcon));
|
|
if (tcon == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Deal with the SMB1 strings. */
|
|
if (tcon_in->smb1.service != NULL) {
|
|
tcon->smb1.service = talloc_strdup(tcon, tcon_in->smb1.service);
|
|
if (tcon->smb1.service == NULL) {
|
|
TALLOC_FREE(tcon);
|
|
return NULL;
|
|
}
|
|
}
|
|
if (tcon->smb1.fs_type != NULL) {
|
|
tcon->smb1.fs_type = talloc_strdup(tcon, tcon_in->smb1.fs_type);
|
|
if (tcon->smb1.fs_type == NULL) {
|
|
TALLOC_FREE(tcon);
|
|
return NULL;
|
|
}
|
|
}
|
|
return tcon;
|
|
}
|
|
|
|
void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
|
|
uint32_t fs_attributes)
|
|
{
|
|
tcon->fs_attributes = fs_attributes;
|
|
}
|
|
|
|
uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->fs_attributes;
|
|
}
|
|
|
|
bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
|
|
{
|
|
if (tcon == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (tcon->is_smb1) {
|
|
if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->smb1.tcon_id;
|
|
}
|
|
|
|
void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
|
|
{
|
|
tcon->is_smb1 = true;
|
|
tcon->smb1.tcon_id = tcon_id;
|
|
}
|
|
|
|
bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
|
|
uint16_t tcon_id,
|
|
uint16_t optional_support,
|
|
uint32_t maximal_access,
|
|
uint32_t guest_maximal_access,
|
|
const char *service,
|
|
const char *fs_type)
|
|
{
|
|
tcon->is_smb1 = true;
|
|
tcon->fs_attributes = 0;
|
|
tcon->smb1.tcon_id = tcon_id;
|
|
tcon->smb1.optional_support = optional_support;
|
|
tcon->smb1.maximal_access = maximal_access;
|
|
tcon->smb1.guest_maximal_access = guest_maximal_access;
|
|
|
|
TALLOC_FREE(tcon->smb1.service);
|
|
tcon->smb1.service = talloc_strdup(tcon, service);
|
|
if (service != NULL && tcon->smb1.service == NULL) {
|
|
return false;
|
|
}
|
|
|
|
TALLOC_FREE(tcon->smb1.fs_type);
|
|
tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
|
|
if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->smb2.tcon_id;
|
|
}
|
|
|
|
void smb2cli_tcon_set_id(struct smbXcli_tcon *tcon, uint32_t tcon_id)
|
|
{
|
|
tcon->smb2.tcon_id = tcon_id;
|
|
}
|
|
|
|
uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->smb2.capabilities;
|
|
}
|
|
|
|
uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->smb2.flags;
|
|
}
|
|
|
|
void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
|
|
struct smbXcli_session *session,
|
|
uint32_t tcon_id,
|
|
uint8_t type,
|
|
uint32_t flags,
|
|
uint32_t capabilities,
|
|
uint32_t maximal_access)
|
|
{
|
|
tcon->is_smb1 = false;
|
|
tcon->fs_attributes = 0;
|
|
tcon->smb2.tcon_id = tcon_id;
|
|
tcon->smb2.type = type;
|
|
tcon->smb2.flags = flags;
|
|
tcon->smb2.capabilities = capabilities;
|
|
tcon->smb2.maximal_access = maximal_access;
|
|
|
|
tcon->smb2.should_sign = false;
|
|
tcon->smb2.should_encrypt = false;
|
|
|
|
if (session == NULL) {
|
|
return;
|
|
}
|
|
|
|
tcon->smb2.should_sign = session->smb2->should_sign;
|
|
tcon->smb2.should_encrypt = session->smb2->should_encrypt;
|
|
|
|
if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
|
|
tcon->smb2.should_encrypt = true;
|
|
}
|
|
}
|
|
|
|
void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
|
|
bool should_sign)
|
|
{
|
|
tcon->smb2.should_sign = should_sign;
|
|
}
|
|
|
|
bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
|
|
{
|
|
if (tcon->smb2.should_encrypt) {
|
|
return true;
|
|
}
|
|
|
|
return tcon->smb2.should_sign;
|
|
}
|
|
|
|
void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
|
|
bool should_encrypt)
|
|
{
|
|
tcon->smb2.should_encrypt = should_encrypt;
|
|
}
|
|
|
|
bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
|
|
{
|
|
return tcon->smb2.should_encrypt;
|
|
}
|
|
|
|
void smb2cli_conn_set_mid(struct smbXcli_conn *conn, uint64_t mid)
|
|
{
|
|
conn->smb2.mid = mid;
|
|
}
|
|
|
|
uint64_t smb2cli_conn_get_mid(struct smbXcli_conn *conn)
|
|
{
|
|
return conn->smb2.mid;
|
|
}
|
|
|
|
NTSTATUS smb2cli_parse_dyn_buffer(uint32_t dyn_offset,
|
|
const DATA_BLOB dyn_buffer,
|
|
uint32_t min_offset,
|
|
uint32_t buffer_offset,
|
|
uint32_t buffer_length,
|
|
uint32_t max_length,
|
|
uint32_t *next_offset,
|
|
DATA_BLOB *buffer)
|
|
{
|
|
uint32_t offset;
|
|
bool oob;
|
|
|
|
*buffer = data_blob_null;
|
|
*next_offset = dyn_offset;
|
|
|
|
if (buffer_offset == 0) {
|
|
/*
|
|
* If the offset is 0, we better ignore
|
|
* the buffer_length field.
|
|
*/
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (buffer_length == 0) {
|
|
/*
|
|
* If the length is 0, we better ignore
|
|
* the buffer_offset field.
|
|
*/
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if ((buffer_offset % 8) != 0) {
|
|
/*
|
|
* The offset needs to be 8 byte aligned.
|
|
*/
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* We used to enforce buffer_offset to be
|
|
* an exact match of the expected minimum,
|
|
* but the NetApp Ontap 7.3.7 SMB server
|
|
* gets the padding wrong and aligns the
|
|
* input_buffer_offset by a value of 8.
|
|
*
|
|
* So we just enforce that the offset is
|
|
* not lower than the expected value.
|
|
*/
|
|
SMB_ASSERT(min_offset >= dyn_offset);
|
|
if (buffer_offset < min_offset) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* Make [input|output]_buffer_offset relative to "dyn_buffer"
|
|
*/
|
|
offset = buffer_offset - dyn_offset;
|
|
oob = smb_buffer_oob(dyn_buffer.length, offset, buffer_length);
|
|
if (oob) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* Give the caller a hint what we consumed,
|
|
* the caller may need to add possible padding.
|
|
*/
|
|
*next_offset = buffer_offset + buffer_length;
|
|
|
|
if (max_length == 0) {
|
|
/*
|
|
* If max_input_length is 0 we ignore the
|
|
* input_buffer_length, because Windows 2008 echos the
|
|
* DCERPC request from the requested input_buffer to
|
|
* the response input_buffer.
|
|
*
|
|
* We just use the same logic also for max_output_length...
|
|
*/
|
|
buffer_length = 0;
|
|
}
|
|
|
|
if (buffer_length > max_length) {
|
|
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
|
}
|
|
|
|
*buffer = (DATA_BLOB) {
|
|
.data = dyn_buffer.data + offset,
|
|
.length = buffer_length,
|
|
};
|
|
return NT_STATUS_OK;
|
|
}
|