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https://github.com/samba-team/samba.git
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daa9d98cf8
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
1021 lines
30 KiB
C
1021 lines
30 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 3.0
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handle NLTMSSP, client server side parsing
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
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Copyright (C) Stefan Metzmacher 2005
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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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struct auth_session_info;
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#include "includes.h"
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#include "auth/ntlmssp/ntlmssp.h"
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#include "../libcli/auth/libcli_auth.h"
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#include "auth/credentials/credentials.h"
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#include "auth/gensec/gensec.h"
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#include "auth/gensec/gensec_internal.h"
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#include "param/param.h"
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#include "auth/ntlmssp/ntlmssp_private.h"
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#include "../librpc/gen_ndr/ndr_ntlmssp.h"
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#include "../auth/ntlmssp/ntlmssp_ndr.h"
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#include "../nsswitch/libwbclient/wbclient.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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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_AUTH
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/*********************************************************************
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Client side NTLMSSP
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*********************************************************************/
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/**
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* Next state function for the Initial packet
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*
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* @param ntlmssp_state NTLMSSP State
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* @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
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* @param in A NULL data blob (input ignored)
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* @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
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* @return Errors or NT_STATUS_OK.
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*/
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NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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DATA_BLOB in, DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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NTSTATUS status;
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const DATA_BLOB version_blob = ntlmssp_version_blob();
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/* generate the ntlmssp negotiate packet */
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status = msrpc_gen(out_mem_ctx,
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out, "CddAAb",
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"NTLMSSP",
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NTLMSSP_NEGOTIATE,
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ntlmssp_state->neg_flags,
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"", /* domain */
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"", /* workstation */
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version_blob.data, version_blob.length);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("ntlmssp_client_initial: failed to generate "
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"ntlmssp negotiate packet\n"));
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return status;
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}
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if (DEBUGLEVEL >= 10) {
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struct NEGOTIATE_MESSAGE *negotiate = talloc(
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ntlmssp_state, struct NEGOTIATE_MESSAGE);
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if (negotiate != NULL) {
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status = ntlmssp_pull_NEGOTIATE_MESSAGE(
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out, negotiate, negotiate);
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if (NT_STATUS_IS_OK(status)) {
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NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
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negotiate);
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}
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TALLOC_FREE(negotiate);
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}
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}
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ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
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*out);
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if (ntlmssp_state->negotiate_blob.length != out->length) {
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return NT_STATUS_NO_MEMORY;
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}
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ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
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return NT_STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS gensec_ntlmssp_resume_ccache(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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DATA_BLOB in, DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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uint32_t neg_flags = 0;
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uint32_t ntlmssp_command;
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NTSTATUS status;
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bool ok;
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*out = data_blob_null;
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if (in.length == 0) {
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/*
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* This is compat code for older callers
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* which were missing the "initial_blob"/"negotiate_blob".
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*
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* That means we can't calculate the NTLMSSP_MIC
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* field correctly and need to force the
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* old_spnego behaviour.
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*/
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DEBUG(10, ("%s: in.length==%u force_old_spnego!\n",
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__func__, (unsigned int)in.length));
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ntlmssp_state->force_old_spnego = true;
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ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
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ntlmssp_state->required_flags = 0;
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ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
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return NT_STATUS_MORE_PROCESSING_REQUIRED;
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}
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/* parse the NTLMSSP packet */
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if (in.length > UINT16_MAX) {
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DEBUG(1, ("%s: reject large request of length %u\n",
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__func__, (unsigned int)in.length));
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return NT_STATUS_INVALID_PARAMETER;
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}
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ok = msrpc_parse(ntlmssp_state, &in, "Cdd",
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"NTLMSSP",
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&ntlmssp_command,
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&neg_flags);
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if (!ok) {
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DEBUG(1, ("%s: failed to parse NTLMSSP Negotiate of length %u\n",
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__func__, (unsigned int)in.length));
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dump_data(2, in.data, in.length);
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
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DEBUG(1, ("%s: no NTLMSSP Negotiate message (length %u)\n",
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__func__, (unsigned int)in.length));
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dump_data(2, in.data, in.length);
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return NT_STATUS_INVALID_PARAMETER;
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}
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ntlmssp_state->neg_flags = neg_flags;
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DEBUG(3, ("Imported Negotiate flags:\n"));
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debug_ntlmssp_flags(neg_flags);
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
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ntlmssp_state->unicode = true;
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} else {
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ntlmssp_state->unicode = false;
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}
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
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gensec_security->want_features |= GENSEC_FEATURE_SIGN;
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}
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
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gensec_security->want_features |= GENSEC_FEATURE_SEAL;
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}
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ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
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ntlmssp_state->required_flags = 0;
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if (DEBUGLEVEL >= 10) {
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struct NEGOTIATE_MESSAGE *negotiate = talloc(
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ntlmssp_state, struct NEGOTIATE_MESSAGE);
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if (negotiate != NULL) {
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status = ntlmssp_pull_NEGOTIATE_MESSAGE(
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&in, negotiate, negotiate);
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if (NT_STATUS_IS_OK(status)) {
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NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
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negotiate);
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}
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TALLOC_FREE(negotiate);
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}
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}
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ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
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in);
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if (ntlmssp_state->negotiate_blob.length != in.length) {
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return NT_STATUS_NO_MEMORY;
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}
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ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
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return NT_STATUS_MORE_PROCESSING_REQUIRED;
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}
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/**
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* Next state function for the Challenge Packet. Generate an auth packet.
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*
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* @param gensec_security GENSEC state
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* @param out_mem_ctx Memory context for *out
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* @param in The server challnege, as a DATA_BLOB. reply.data must be NULL
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* @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
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* @return Errors or NT_STATUS_OK.
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*/
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NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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const DATA_BLOB in, DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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uint32_t chal_flags, ntlmssp_command, unkn1 = 0, unkn2 = 0;
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DATA_BLOB server_domain_blob;
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DATA_BLOB challenge_blob;
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DATA_BLOB target_info = data_blob(NULL, 0);
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char *server_domain;
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const char *chal_parse_string;
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const char *chal_parse_string_short = NULL;
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const char *auth_gen_string;
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DATA_BLOB lm_response = data_blob(NULL, 0);
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DATA_BLOB nt_response = data_blob(NULL, 0);
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DATA_BLOB session_key = data_blob(NULL, 0);
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DATA_BLOB lm_session_key = data_blob(NULL, 0);
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DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
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NTSTATUS nt_status;
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int flags = 0;
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const char *user = NULL, *domain = NULL, *workstation = NULL;
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bool is_anonymous = false;
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const DATA_BLOB version_blob = ntlmssp_version_blob();
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const NTTIME *server_timestamp = NULL;
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uint8_t mic_buffer[NTLMSSP_MIC_SIZE] = { 0, };
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DATA_BLOB mic_blob = data_blob_const(mic_buffer, sizeof(mic_buffer));
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gnutls_hmac_hd_t hmac_hnd = NULL;
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int rc;
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TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
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if (!mem_ctx) {
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return NT_STATUS_NO_MEMORY;
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}
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if (!msrpc_parse(mem_ctx,
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&in, "CdBd",
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"NTLMSSP",
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&ntlmssp_command,
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&server_domain_blob,
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&chal_flags)) {
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DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
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dump_data(2, in.data, in.length);
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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data_blob_free(&server_domain_blob);
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DEBUG(3, ("Got challenge flags:\n"));
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debug_ntlmssp_flags(chal_flags);
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nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
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chal_flags, "challenge");
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if (!NT_STATUS_IS_OK(nt_status)) {
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return nt_status;
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}
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if (ntlmssp_state->unicode) {
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if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
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chal_parse_string = "CdUdbddB";
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} else {
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chal_parse_string = "CdUdbdd";
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chal_parse_string_short = "CdUdb";
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}
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auth_gen_string = "CdBBUUUBdbb";
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} else {
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if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
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chal_parse_string = "CdAdbddB";
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} else {
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chal_parse_string = "CdAdbdd";
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chal_parse_string_short = "CdAdb";
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}
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auth_gen_string = "CdBBAAABdbb";
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}
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if (!msrpc_parse(mem_ctx,
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&in, chal_parse_string,
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"NTLMSSP",
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&ntlmssp_command,
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&server_domain,
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&chal_flags,
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&challenge_blob, 8,
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&unkn1, &unkn2,
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&target_info)) {
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bool ok = false;
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DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
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if (chal_parse_string_short != NULL) {
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/*
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* In the case where NTLMSSP_NEGOTIATE_TARGET_INFO
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* is not used, some NTLMSSP servers don't return
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* the unused unkn1 and unkn2 fields.
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* See bug:
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* https://bugzilla.samba.org/show_bug.cgi?id=10016
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* for packet traces.
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* Try and parse again without them.
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*/
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ok = msrpc_parse(mem_ctx,
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&in, chal_parse_string_short,
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"NTLMSSP",
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&ntlmssp_command,
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&server_domain,
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&chal_flags,
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&challenge_blob, 8);
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if (!ok) {
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DEBUG(1, ("Failed to short parse "
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"the NTLMSSP Challenge: (#2)\n"));
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}
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}
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if (!ok) {
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dump_data(2, in.data, in.length);
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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}
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if (DEBUGLEVEL >= 10) {
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struct CHALLENGE_MESSAGE *challenge =
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talloc(ntlmssp_state, struct CHALLENGE_MESSAGE);
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if (challenge != NULL) {
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NTSTATUS status;
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challenge->NegotiateFlags = chal_flags;
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status = ntlmssp_pull_CHALLENGE_MESSAGE(
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&in, challenge, challenge);
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if (NT_STATUS_IS_OK(status)) {
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NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
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challenge);
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}
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TALLOC_FREE(challenge);
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}
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}
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if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
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ntlmssp_state->server.is_standalone = true;
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} else {
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ntlmssp_state->server.is_standalone = false;
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}
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/* TODO: parse struct_blob and fill in the rest */
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ntlmssp_state->server.netbios_name = "";
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ntlmssp_state->server.netbios_domain = talloc_move(ntlmssp_state, &server_domain);
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ntlmssp_state->server.dns_name = "";
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ntlmssp_state->server.dns_domain = "";
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if (challenge_blob.length != 8) {
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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is_anonymous = cli_credentials_is_anonymous(gensec_security->credentials);
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cli_credentials_get_ntlm_username_domain(gensec_security->credentials, mem_ctx,
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&user, &domain);
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workstation = cli_credentials_get_workstation(gensec_security->credentials);
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if (user == NULL) {
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DEBUG(10, ("User is NULL, returning INVALID_PARAMETER\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (domain == NULL) {
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DEBUG(10, ("Domain is NULL, returning INVALID_PARAMETER\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (workstation == NULL) {
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DEBUG(10, ("Workstation is NULL, returning INVALID_PARAMETER\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (is_anonymous) {
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ntlmssp_state->neg_flags |= NTLMSSP_ANONYMOUS;
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/*
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* don't use the ccache for anonymous auth
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*/
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ntlmssp_state->use_ccache = false;
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}
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if (ntlmssp_state->use_ccache) {
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struct samr_Password *nt_hash = NULL;
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/*
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* If we have a password given we don't
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* use the ccache
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*/
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nt_hash = cli_credentials_get_nt_hash(gensec_security->credentials,
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mem_ctx);
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if (nt_hash != NULL) {
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ZERO_STRUCTP(nt_hash);
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TALLOC_FREE(nt_hash);
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ntlmssp_state->use_ccache = false;
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}
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}
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if (ntlmssp_state->use_ccache) {
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struct wbcCredentialCacheParams params;
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struct wbcCredentialCacheInfo *info = NULL;
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struct wbcAuthErrorInfo *error = NULL;
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struct wbcNamedBlob auth_blobs[2];
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const struct wbcBlob *wbc_auth_blob = NULL;
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const struct wbcBlob *wbc_session_key = NULL;
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wbcErr wbc_status;
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size_t i;
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bool new_spnego = false;
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params.account_name = user;
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params.domain_name = domain;
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params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
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auth_blobs[0].name = "challenge_blob";
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auth_blobs[0].flags = 0;
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auth_blobs[0].blob.data = in.data;
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auth_blobs[0].blob.length = in.length;
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auth_blobs[1].name = "negotiate_blob";
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auth_blobs[1].flags = 0;
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auth_blobs[1].blob.data = ntlmssp_state->negotiate_blob.data;
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auth_blobs[1].blob.length = ntlmssp_state->negotiate_blob.length;
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params.num_blobs = ARRAY_SIZE(auth_blobs);
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params.blobs = auth_blobs;
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wbc_status = wbcCredentialCache(¶ms, &info, &error);
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wbcFreeMemory(error);
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if (!WBC_ERROR_IS_OK(wbc_status)) {
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return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
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}
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for (i=0; i<info->num_blobs; i++) {
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if (strequal(info->blobs[i].name, "auth_blob")) {
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wbc_auth_blob = &info->blobs[i].blob;
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}
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if (strequal(info->blobs[i].name, "session_key")) {
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wbc_session_key = &info->blobs[i].blob;
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}
|
|
if (strequal(info->blobs[i].name, "new_spnego")) {
|
|
new_spnego = true;
|
|
}
|
|
}
|
|
if ((wbc_auth_blob == NULL) || (wbc_session_key == NULL)) {
|
|
wbcFreeMemory(info);
|
|
return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
|
|
}
|
|
|
|
session_key = data_blob_talloc(mem_ctx,
|
|
wbc_session_key->data,
|
|
wbc_session_key->length);
|
|
if (session_key.length != wbc_session_key->length) {
|
|
wbcFreeMemory(info);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
*out = data_blob_talloc(mem_ctx,
|
|
wbc_auth_blob->data,
|
|
wbc_auth_blob->length);
|
|
if (out->length != wbc_auth_blob->length) {
|
|
wbcFreeMemory(info);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
ntlmssp_state->new_spnego = new_spnego;
|
|
|
|
wbcFreeMemory(info);
|
|
goto done;
|
|
}
|
|
|
|
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
|
|
flags |= CLI_CRED_NTLM2;
|
|
}
|
|
if (ntlmssp_state->use_ntlmv2) {
|
|
flags |= CLI_CRED_NTLMv2_AUTH;
|
|
}
|
|
if (ntlmssp_state->use_nt_response) {
|
|
flags |= CLI_CRED_NTLM_AUTH;
|
|
}
|
|
if (ntlmssp_state->allow_lm_response) {
|
|
flags |= CLI_CRED_LANMAN_AUTH;
|
|
}
|
|
|
|
if (target_info.length != 0 && !is_anonymous) {
|
|
struct AV_PAIR *pairs = NULL;
|
|
uint32_t count = 0;
|
|
enum ndr_err_code err;
|
|
struct AV_PAIR *timestamp = NULL;
|
|
struct AV_PAIR *eol = NULL;
|
|
uint32_t i = 0;
|
|
const char *service = NULL;
|
|
const char *hostname = NULL;
|
|
|
|
err = ndr_pull_struct_blob(&target_info,
|
|
ntlmssp_state,
|
|
&ntlmssp_state->server.av_pair_list,
|
|
(ndr_pull_flags_fn_t)ndr_pull_AV_PAIR_LIST);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
|
|
return ndr_map_error2ntstatus(err);
|
|
}
|
|
|
|
count = ntlmssp_state->server.av_pair_list.count;
|
|
/*
|
|
* We need room for Flags, SingleHost,
|
|
* ChannelBindings and Target
|
|
*/
|
|
pairs = talloc_zero_array(ntlmssp_state, struct AV_PAIR,
|
|
count + 4);
|
|
if (pairs == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
pairs[i] = ntlmssp_state->server.av_pair_list.pair[i];
|
|
}
|
|
|
|
ntlmssp_state->client.av_pair_list.count = count;
|
|
ntlmssp_state->client.av_pair_list.pair = pairs;
|
|
|
|
eol = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
|
|
MsvAvEOL);
|
|
if (eol == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
timestamp = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
|
|
MsvAvTimestamp);
|
|
if (timestamp != NULL) {
|
|
uint32_t sign_features =
|
|
GENSEC_FEATURE_SESSION_KEY |
|
|
GENSEC_FEATURE_SIGN |
|
|
GENSEC_FEATURE_SEAL;
|
|
|
|
server_timestamp = ×tamp->Value.AvTimestamp;
|
|
|
|
if (ntlmssp_state->force_old_spnego) {
|
|
sign_features = 0;
|
|
}
|
|
|
|
if (gensec_security->want_features & sign_features) {
|
|
struct AV_PAIR *av_flags = NULL;
|
|
|
|
av_flags = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
|
|
MsvAvFlags);
|
|
if (av_flags == NULL) {
|
|
av_flags = eol;
|
|
eol++;
|
|
count++;
|
|
*eol = *av_flags;
|
|
av_flags->AvId = MsvAvFlags;
|
|
av_flags->Value.AvFlags = 0;
|
|
}
|
|
|
|
av_flags->Value.AvFlags |= NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE;
|
|
ntlmssp_state->new_spnego = true;
|
|
}
|
|
}
|
|
|
|
{
|
|
struct AV_PAIR *SingleHost = NULL;
|
|
|
|
SingleHost = eol;
|
|
eol++;
|
|
count++;
|
|
*eol = *SingleHost;
|
|
|
|
/*
|
|
* This is not really used, but we want to
|
|
* add some more random bytes and match
|
|
* Windows.
|
|
*/
|
|
SingleHost->AvId = MsvAvSingleHost;
|
|
SingleHost->Value.AvSingleHost.token_info.Flags = 0;
|
|
SingleHost->Value.AvSingleHost.token_info.TokenIL = 0;
|
|
generate_random_buffer(SingleHost->Value.AvSingleHost.token_info.MachineId,
|
|
sizeof(SingleHost->Value.AvSingleHost.token_info.MachineId));
|
|
SingleHost->Value.AvSingleHost.remaining = data_blob_null;
|
|
}
|
|
|
|
{
|
|
struct AV_PAIR *ChannelBindings = NULL;
|
|
|
|
ChannelBindings = eol;
|
|
eol++;
|
|
count++;
|
|
*eol = *ChannelBindings;
|
|
|
|
/*
|
|
* gensec doesn't support channel bindings yet,
|
|
* but we want to match Windows on the wire
|
|
*/
|
|
ChannelBindings->AvId = MsvChannelBindings;
|
|
memset(ChannelBindings->Value.ChannelBindings, 0,
|
|
sizeof(ChannelBindings->Value.ChannelBindings));
|
|
}
|
|
|
|
service = gensec_get_target_service(gensec_security);
|
|
hostname = gensec_get_target_hostname(gensec_security);
|
|
if (service != NULL && hostname != NULL) {
|
|
struct AV_PAIR *target = NULL;
|
|
|
|
target = eol;
|
|
eol++;
|
|
count++;
|
|
*eol = *target;
|
|
|
|
target->AvId = MsvAvTargetName;
|
|
target->Value.AvTargetName = talloc_asprintf(pairs, "%s/%s",
|
|
service,
|
|
hostname);
|
|
if (target->Value.AvTargetName == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
ntlmssp_state->client.av_pair_list.count = count;
|
|
ntlmssp_state->client.av_pair_list.pair = pairs;
|
|
|
|
err = ndr_push_struct_blob(&target_info,
|
|
ntlmssp_state,
|
|
&ntlmssp_state->client.av_pair_list,
|
|
(ndr_push_flags_fn_t)ndr_push_AV_PAIR_LIST);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
nt_status = cli_credentials_get_ntlm_response(gensec_security->credentials, mem_ctx,
|
|
&flags, challenge_blob,
|
|
server_timestamp, target_info,
|
|
&lm_response, &nt_response,
|
|
&lm_session_key, &session_key);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
return nt_status;
|
|
}
|
|
|
|
if (!(flags & CLI_CRED_LANMAN_AUTH)) {
|
|
/* LM Key is still possible, just silly, so we do not
|
|
* allow it. Fortunetly all LM crypto is off by
|
|
* default and we require command line options to end
|
|
* up here */
|
|
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
|
|
}
|
|
|
|
if (!(flags & CLI_CRED_NTLM2)) {
|
|
/* NTLM2 is incompatible... */
|
|
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
|
|
}
|
|
|
|
if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
|
|
&& ntlmssp_state->allow_lm_key && lm_session_key.length == 16) {
|
|
DATA_BLOB new_session_key = data_blob_talloc(mem_ctx, NULL, 16);
|
|
if (lm_response.length == 24) {
|
|
nt_status = SMBsesskeygen_lm_sess_key(lm_session_key.data,
|
|
lm_response.data,
|
|
new_session_key.data);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
return nt_status;
|
|
}
|
|
} else {
|
|
static const uint8_t zeros[24];
|
|
nt_status = SMBsesskeygen_lm_sess_key(lm_session_key.data,
|
|
zeros,
|
|
new_session_key.data);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
return nt_status;
|
|
}
|
|
}
|
|
session_key = new_session_key;
|
|
dump_data_pw("LM session key\n", session_key.data, session_key.length);
|
|
}
|
|
|
|
|
|
/* Key exchange encryptes a new client-generated session key with
|
|
the password-derived key */
|
|
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
|
|
/* Make up a new session key */
|
|
uint8_t client_session_key[16];
|
|
gnutls_cipher_hd_t cipher_hnd;
|
|
gnutls_datum_t enc_session_key = {
|
|
.data = session_key.data,
|
|
.size = session_key.length,
|
|
};
|
|
|
|
generate_random_buffer(client_session_key, sizeof(client_session_key));
|
|
|
|
/* Encrypt the new session key with the old one */
|
|
encrypted_session_key = data_blob_talloc(ntlmssp_state,
|
|
client_session_key, sizeof(client_session_key));
|
|
dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
|
|
|
|
rc = gnutls_cipher_init(&cipher_hnd,
|
|
GNUTLS_CIPHER_ARCFOUR_128,
|
|
&enc_session_key,
|
|
NULL);
|
|
if (rc < 0) {
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
ZERO_ARRAY(client_session_key);
|
|
goto done;
|
|
}
|
|
rc = gnutls_cipher_encrypt(cipher_hnd,
|
|
encrypted_session_key.data,
|
|
encrypted_session_key.length);
|
|
gnutls_cipher_deinit(cipher_hnd);
|
|
if (rc < 0) {
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
ZERO_ARRAY(client_session_key);
|
|
goto done;
|
|
}
|
|
|
|
dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
|
|
|
|
/* Mark the new session key as the 'real' session key */
|
|
session_key = data_blob_talloc(mem_ctx, client_session_key, sizeof(client_session_key));
|
|
ZERO_ARRAY(client_session_key);
|
|
}
|
|
|
|
/* this generates the actual auth packet */
|
|
nt_status = msrpc_gen(mem_ctx,
|
|
out, auth_gen_string,
|
|
"NTLMSSP",
|
|
NTLMSSP_AUTH,
|
|
lm_response.data, lm_response.length,
|
|
nt_response.data, nt_response.length,
|
|
domain,
|
|
user,
|
|
workstation,
|
|
encrypted_session_key.data, encrypted_session_key.length,
|
|
ntlmssp_state->neg_flags,
|
|
version_blob.data, version_blob.length,
|
|
mic_blob.data, mic_blob.length);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
talloc_free(mem_ctx);
|
|
return nt_status;
|
|
}
|
|
|
|
if (DEBUGLEVEL >= 10) {
|
|
struct AUTHENTICATE_MESSAGE *authenticate =
|
|
talloc(ntlmssp_state, struct AUTHENTICATE_MESSAGE);
|
|
if (authenticate != NULL) {
|
|
NTSTATUS status;
|
|
authenticate->NegotiateFlags = ntlmssp_state->neg_flags;
|
|
status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
|
|
out, authenticate, authenticate);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
|
|
authenticate);
|
|
}
|
|
TALLOC_FREE(authenticate);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We always include the MIC, even without:
|
|
* av_flags->Value.AvFlags |= NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE;
|
|
* ntlmssp_state->new_spnego = true;
|
|
*
|
|
* This matches a Windows client.
|
|
*/
|
|
rc = gnutls_hmac_init(&hmac_hnd,
|
|
GNUTLS_MAC_MD5,
|
|
session_key.data,
|
|
MIN(session_key.length, 64));
|
|
if (rc < 0) {
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
goto done;
|
|
}
|
|
|
|
rc = gnutls_hmac(hmac_hnd,
|
|
ntlmssp_state->negotiate_blob.data,
|
|
ntlmssp_state->negotiate_blob.length);
|
|
if (rc < 0) {
|
|
gnutls_hmac_deinit(hmac_hnd, NULL);
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
goto done;
|
|
}
|
|
rc = gnutls_hmac(hmac_hnd, in.data, in.length);
|
|
if (rc < 0) {
|
|
gnutls_hmac_deinit(hmac_hnd, NULL);
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
goto done;
|
|
}
|
|
rc = gnutls_hmac(hmac_hnd, out->data, out->length);
|
|
if (rc < 0) {
|
|
gnutls_hmac_deinit(hmac_hnd, NULL);
|
|
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
|
|
goto done;
|
|
}
|
|
|
|
gnutls_hmac_deinit(hmac_hnd, mic_buffer);
|
|
|
|
memcpy(out->data + NTLMSSP_MIC_OFFSET, mic_buffer, NTLMSSP_MIC_SIZE);
|
|
ZERO_ARRAY(mic_buffer);
|
|
|
|
nt_status = NT_STATUS_OK;
|
|
done:
|
|
ZERO_ARRAY_LEN(ntlmssp_state->negotiate_blob.data,
|
|
ntlmssp_state->negotiate_blob.length);
|
|
data_blob_free(&ntlmssp_state->negotiate_blob);
|
|
|
|
ntlmssp_state->session_key = session_key;
|
|
talloc_steal(ntlmssp_state, session_key.data);
|
|
|
|
DEBUG(3, ("NTLMSSP: Set final flags:\n"));
|
|
debug_ntlmssp_flags(ntlmssp_state->neg_flags);
|
|
|
|
talloc_steal(out_mem_ctx, out->data);
|
|
|
|
ntlmssp_state->expected_state = NTLMSSP_DONE;
|
|
|
|
if (gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
|
|
nt_status = ntlmssp_sign_init(ntlmssp_state);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
|
|
nt_errstr(nt_status)));
|
|
talloc_free(mem_ctx);
|
|
return nt_status;
|
|
}
|
|
}
|
|
|
|
talloc_free(mem_ctx);
|
|
return nt_status;
|
|
}
|
|
|
|
NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
|
|
{
|
|
struct gensec_ntlmssp_context *gensec_ntlmssp;
|
|
struct ntlmssp_state *ntlmssp_state;
|
|
NTSTATUS nt_status;
|
|
|
|
nt_status = gensec_ntlmssp_start(gensec_security);
|
|
NT_STATUS_NOT_OK_RETURN(nt_status);
|
|
|
|
gensec_ntlmssp =
|
|
talloc_get_type_abort(gensec_security->private_data,
|
|
struct gensec_ntlmssp_context);
|
|
|
|
ntlmssp_state = talloc_zero(gensec_ntlmssp,
|
|
struct ntlmssp_state);
|
|
if (!ntlmssp_state) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
|
|
|
|
ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
|
|
|
|
ntlmssp_state->role = NTLMSSP_CLIENT;
|
|
|
|
ntlmssp_state->client.netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
|
|
ntlmssp_state->client.netbios_name = cli_credentials_get_workstation(gensec_security->credentials);
|
|
|
|
ntlmssp_state->unicode = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "unicode", true);
|
|
|
|
ntlmssp_state->use_nt_response = \
|
|
gensec_setting_bool(gensec_security->settings,
|
|
"ntlmssp_client",
|
|
"send_nt_response",
|
|
true);
|
|
|
|
ntlmssp_state->allow_lm_response = lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx);
|
|
|
|
ntlmssp_state->allow_lm_key = (ntlmssp_state->allow_lm_response
|
|
&& (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "allow_lm_key", false)
|
|
|| gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)));
|
|
|
|
ntlmssp_state->use_ntlmv2 = lpcfg_client_ntlmv2_auth(gensec_security->settings->lp_ctx);
|
|
|
|
ntlmssp_state->force_old_spnego = gensec_setting_bool(gensec_security->settings,
|
|
"ntlmssp_client", "force_old_spnego", false);
|
|
|
|
ntlmssp_state->expected_state = NTLMSSP_INITIAL;
|
|
|
|
ntlmssp_state->neg_flags =
|
|
NTLMSSP_NEGOTIATE_NTLM |
|
|
NTLMSSP_NEGOTIATE_VERSION |
|
|
NTLMSSP_REQUEST_TARGET;
|
|
|
|
if (ntlmssp_state->unicode) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
|
|
} else {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "128bit", true)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "56bit", false)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "keyexchange", true)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "alwayssign", true)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
|
|
}
|
|
|
|
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "ntlm2", true)) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
|
|
} else {
|
|
/* apparently we can't do ntlmv2 if we don't do ntlm2 */
|
|
ntlmssp_state->use_ntlmv2 = false;
|
|
}
|
|
|
|
if (ntlmssp_state->use_ntlmv2) {
|
|
ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_NTLM2;
|
|
ntlmssp_state->allow_lm_response = false;
|
|
ntlmssp_state->allow_lm_key = false;
|
|
}
|
|
|
|
if (ntlmssp_state->allow_lm_key) {
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
|
|
}
|
|
|
|
if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
|
|
/*
|
|
* We need to set this to allow a later SetPassword
|
|
* via the SAMR pipe to succeed. Strange.... We could
|
|
* also add NTLMSSP_NEGOTIATE_SEAL here. JRA.
|
|
*
|
|
* Without this, Windows will not create the master key
|
|
* that it thinks is only used for NTLMSSP signing and
|
|
* sealing. (It is actually pulled out and used directly)
|
|
*
|
|
* We don't require this here as some servers (e.g. NetAPP)
|
|
* doesn't support this.
|
|
*/
|
|
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
|
|
}
|
|
if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
|
|
ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
|
|
|
|
if (gensec_security->want_features & GENSEC_FEATURE_LDAP_STYLE) {
|
|
/*
|
|
* We need to handle NTLMSSP_NEGOTIATE_SIGN as
|
|
* NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
|
|
* is requested.
|
|
*/
|
|
ntlmssp_state->force_wrap_seal = true;
|
|
}
|
|
}
|
|
if (ntlmssp_state->force_wrap_seal) {
|
|
bool ret;
|
|
|
|
/*
|
|
* We want also work against old Samba servers
|
|
* which didn't had GENSEC_FEATURE_LDAP_STYLE
|
|
* we negotiate SEAL too. We may remove this
|
|
* in a few years. As all servers should have
|
|
* GENSEC_FEATURE_LDAP_STYLE by then.
|
|
*/
|
|
ret = gensec_setting_bool(gensec_security->settings,
|
|
"ntlmssp_client",
|
|
"ldap_style_send_seal",
|
|
true);
|
|
if (ret) {
|
|
ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
|
|
}
|
|
}
|
|
if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
|
|
ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
|
|
ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
|
|
}
|
|
if (gensec_security->want_features & GENSEC_FEATURE_NTLM_CCACHE) {
|
|
ntlmssp_state->use_ccache = true;
|
|
}
|
|
|
|
ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
|
|
ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS gensec_ntlmssp_resume_ccache_start(struct gensec_security *gensec_security)
|
|
{
|
|
struct gensec_ntlmssp_context *gensec_ntlmssp = NULL;
|
|
NTSTATUS status;
|
|
|
|
status = gensec_ntlmssp_client_start(gensec_security);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
|
|
struct gensec_ntlmssp_context);
|
|
gensec_ntlmssp->ntlmssp_state->use_ccache = false;
|
|
gensec_ntlmssp->ntlmssp_state->resume_ccache = true;
|
|
gensec_ntlmssp->ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|