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894e5001c7
In future this will an impersonation wrapper tevent_context based on the user session. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
461 lines
13 KiB
C
461 lines
13 KiB
C
/*
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Unix SMB/CIFS implementation.
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Core SMB2 server
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Copyright (C) Stefan Metzmacher 2009
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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 "smbd/smbd.h"
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#include "smbd/globals.h"
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#include "../libcli/smb/smb_common.h"
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#include "../lib/util/tevent_ntstatus.h"
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#include "include/ntioctl.h"
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#include "smb2_ioctl_private.h"
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#include "librpc/gen_ndr/ioctl.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_SMB2
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static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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struct files_struct *in_fsp,
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uint32_t in_ctl_code,
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DATA_BLOB in_input,
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uint32_t in_max_output,
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uint32_t in_flags);
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static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *out_output,
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bool *disconnect);
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static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
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NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
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{
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NTSTATUS status;
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const uint8_t *inbody;
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uint32_t min_buffer_offset;
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uint32_t max_buffer_offset;
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uint32_t min_output_offset;
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uint32_t allowed_length_in;
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uint32_t allowed_length_out;
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uint32_t in_ctl_code;
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uint64_t in_file_id_persistent;
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uint64_t in_file_id_volatile;
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struct files_struct *in_fsp = NULL;
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uint32_t in_input_offset;
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uint32_t in_input_length;
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DATA_BLOB in_input_buffer = data_blob_null;
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uint32_t in_max_input_length;
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uint32_t in_output_offset;
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uint32_t in_output_length;
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DATA_BLOB in_output_buffer = data_blob_null;
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uint32_t in_max_output_length;
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uint32_t in_flags;
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uint32_t data_length_in;
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uint32_t data_length_out;
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uint32_t data_length_tmp;
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uint32_t data_length_max;
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struct tevent_req *subreq;
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status = smbd_smb2_request_verify_sizes(req, 0x39);
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if (!NT_STATUS_IS_OK(status)) {
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return smbd_smb2_request_error(req, status);
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}
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inbody = SMBD_SMB2_IN_BODY_PTR(req);
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in_ctl_code = IVAL(inbody, 0x04);
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in_file_id_persistent = BVAL(inbody, 0x08);
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in_file_id_volatile = BVAL(inbody, 0x10);
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in_input_offset = IVAL(inbody, 0x18);
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in_input_length = IVAL(inbody, 0x1C);
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in_max_input_length = IVAL(inbody, 0x20);
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in_output_offset = IVAL(inbody, 0x24);
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in_output_length = IVAL(inbody, 0x28);
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in_max_output_length = IVAL(inbody, 0x2C);
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in_flags = IVAL(inbody, 0x30);
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min_buffer_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req);
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max_buffer_offset = min_buffer_offset + SMBD_SMB2_IN_DYN_LEN(req);
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min_output_offset = min_buffer_offset;
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/*
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* InputOffset (4 bytes): The offset, in bytes, from the beginning of
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* the SMB2 header to the input data buffer. If no input data is
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* required for the FSCTL/IOCTL command being issued, the client SHOULD
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* set this value to 0.<49>
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* <49> If no input data is required for the FSCTL/IOCTL command being
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* issued, Windows-based clients set this field to any value.
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*/
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allowed_length_in = 0;
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if ((in_input_offset > 0) && (in_input_length > 0)) {
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uint32_t tmp_ofs;
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if (in_input_offset < min_buffer_offset) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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if (in_input_offset > max_buffer_offset) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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allowed_length_in = max_buffer_offset - in_input_offset;
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tmp_ofs = in_input_offset - min_buffer_offset;
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in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
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in_input_buffer.data += tmp_ofs;
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in_input_buffer.length = in_input_length;
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min_output_offset += tmp_ofs;
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min_output_offset += in_input_length;
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}
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if (in_input_length > allowed_length_in) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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allowed_length_out = 0;
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if (in_output_offset > 0) {
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if (in_output_offset < min_buffer_offset) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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if (in_output_offset > max_buffer_offset) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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allowed_length_out = max_buffer_offset - in_output_offset;
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}
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if (in_output_length > allowed_length_out) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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if (in_output_length > 0) {
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uint32_t tmp_ofs;
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if (in_output_offset < min_output_offset) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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tmp_ofs = in_output_offset - min_buffer_offset;
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in_output_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
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in_output_buffer.data += tmp_ofs;
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in_output_buffer.length = in_output_length;
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}
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/*
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* verify the credits and avoid overflows
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* in_input_buffer.length and in_output_buffer.length
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* are already verified.
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*/
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data_length_in = in_input_buffer.length + in_output_buffer.length;
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data_length_out = in_max_input_length;
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data_length_tmp = UINT32_MAX - data_length_out;
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if (data_length_tmp < in_max_output_length) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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data_length_out += in_max_output_length;
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data_length_max = MAX(data_length_in, data_length_out);
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status = smbd_smb2_request_verify_creditcharge(req, data_length_max);
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if (!NT_STATUS_IS_OK(status)) {
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return smbd_smb2_request_error(req, status);
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}
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/*
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* If the Flags field of the request is not SMB2_0_IOCTL_IS_FSCTL the
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* server MUST fail the request with STATUS_NOT_SUPPORTED.
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*/
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if (in_flags != SMB2_IOCTL_FLAG_IS_FSCTL) {
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return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
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}
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switch (in_ctl_code) {
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case FSCTL_DFS_GET_REFERRALS:
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case FSCTL_DFS_GET_REFERRALS_EX:
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case FSCTL_PIPE_WAIT:
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case FSCTL_VALIDATE_NEGOTIATE_INFO_224:
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case FSCTL_VALIDATE_NEGOTIATE_INFO:
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case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
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/*
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* Some SMB2 specific CtlCodes like FSCTL_DFS_GET_REFERRALS or
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* FSCTL_PIPE_WAIT does not take a file handle.
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*
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* If FileId in the SMB2 Header of the request is not
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* 0xFFFFFFFFFFFFFFFF, then the server MUST fail the request
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* with STATUS_INVALID_PARAMETER.
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*/
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if (in_file_id_persistent != UINT64_MAX ||
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in_file_id_volatile != UINT64_MAX) {
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return smbd_smb2_request_error(req,
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NT_STATUS_INVALID_PARAMETER);
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}
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break;
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default:
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in_fsp = file_fsp_smb2(req, in_file_id_persistent,
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in_file_id_volatile);
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if (in_fsp == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
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}
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break;
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}
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subreq = smbd_smb2_ioctl_send(req, req->ev_ctx,
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req, in_fsp,
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in_ctl_code,
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in_input_buffer,
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in_max_output_length,
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in_flags);
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if (subreq == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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}
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tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
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return smbd_smb2_request_pending_queue(req, subreq, 1000);
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}
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/*
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* 3.3.4.4 Sending an Error Response
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* An error code other than one of the following indicates a failure:
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*/
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static bool smbd_smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
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size_t data_size)
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{
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if (NT_STATUS_IS_OK(status)) {
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return false;
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}
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/*
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* STATUS_BUFFER_OVERFLOW in a FSCTL_PIPE_TRANSCEIVE, FSCTL_PIPE_PEEK or
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* FSCTL_DFS_GET_REFERRALS Response specified in section 2.2.32.<153>
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*/
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if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
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&& ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
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|| (ctl_code == FSCTL_PIPE_PEEK)
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|| (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
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return false;
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}
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/*
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* Any status other than STATUS_SUCCESS in a FSCTL_SRV_COPYCHUNK or
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* FSCTL_SRV_COPYCHUNK_WRITE Response, when returning an
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* SRV_COPYCHUNK_RESPONSE as described in section 2.2.32.1.
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*/
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if (((ctl_code == FSCTL_SRV_COPYCHUNK)
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|| (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
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&& (data_size == sizeof(struct srv_copychunk_rsp))) {
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return false;
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}
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return true;
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}
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static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
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{
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struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
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struct smbd_smb2_request);
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const uint8_t *inbody;
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DATA_BLOB outbody;
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DATA_BLOB outdyn;
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uint32_t in_ctl_code;
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uint64_t in_file_id_persistent;
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uint64_t in_file_id_volatile;
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uint32_t out_input_offset;
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uint32_t out_output_offset;
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DATA_BLOB out_output_buffer = data_blob_null;
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NTSTATUS status;
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NTSTATUS error; /* transport error */
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bool disconnect = false;
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status = smbd_smb2_ioctl_recv(subreq, req,
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&out_output_buffer,
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&disconnect);
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DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
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"%u status %s\n",
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(unsigned int)out_output_buffer.length,
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nt_errstr(status) ));
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TALLOC_FREE(subreq);
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if (disconnect) {
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error = status;
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smbd_server_connection_terminate(req->xconn,
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nt_errstr(error));
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return;
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}
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inbody = SMBD_SMB2_IN_BODY_PTR(req);
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in_ctl_code = IVAL(inbody, 0x04);
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in_file_id_persistent = BVAL(inbody, 0x08);
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in_file_id_volatile = BVAL(inbody, 0x10);
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if (smbd_smb2_ioctl_is_failure(in_ctl_code, status,
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out_output_buffer.length)) {
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error = smbd_smb2_request_error(req, status);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->xconn,
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nt_errstr(error));
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return;
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}
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return;
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}
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out_input_offset = SMB2_HDR_BODY + 0x30;
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out_output_offset = SMB2_HDR_BODY + 0x30;
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outbody = smbd_smb2_generate_outbody(req, 0x30);
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if (outbody.data == NULL) {
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error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->xconn,
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nt_errstr(error));
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return;
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}
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return;
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}
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SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */
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SSVAL(outbody.data, 0x02, 0); /* reserved */
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SIVAL(outbody.data, 0x04,
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in_ctl_code); /* ctl code */
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SBVAL(outbody.data, 0x08,
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in_file_id_persistent); /* file id (persistent) */
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SBVAL(outbody.data, 0x10,
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in_file_id_volatile); /* file id (volatile) */
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SIVAL(outbody.data, 0x18,
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out_input_offset); /* input offset */
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SIVAL(outbody.data, 0x1C, 0); /* input count */
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SIVAL(outbody.data, 0x20,
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out_output_offset); /* output offset */
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SIVAL(outbody.data, 0x24,
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out_output_buffer.length); /* output count */
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SIVAL(outbody.data, 0x28, 0); /* flags */
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SIVAL(outbody.data, 0x2C, 0); /* reserved */
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/*
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* Note: Windows Vista and 2008 send back also the
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* input from the request. But it was fixed in
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* Windows 7.
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*/
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outdyn = out_output_buffer;
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error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
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__location__);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->xconn,
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nt_errstr(error));
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return;
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}
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}
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static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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struct files_struct *fsp,
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uint32_t in_ctl_code,
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DATA_BLOB in_input,
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uint32_t in_max_output,
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uint32_t in_flags)
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{
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struct tevent_req *req;
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struct smbd_smb2_ioctl_state *state;
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struct smb_request *smbreq;
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req = tevent_req_create(mem_ctx, &state,
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struct smbd_smb2_ioctl_state);
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if (req == NULL) {
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return NULL;
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}
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state->smb2req = smb2req;
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state->smbreq = NULL;
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state->fsp = fsp;
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state->in_input = in_input;
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state->in_max_output = in_max_output;
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state->out_output = data_blob_null;
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DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] %s, %s\n",
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(unsigned)in_ctl_code,
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fsp ? fsp_str_dbg(fsp) : "<no handle>",
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fsp_fnum_dbg(fsp)));
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smbreq = smbd_smb2_fake_smb_request(smb2req);
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if (tevent_req_nomem(smbreq, req)) {
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return tevent_req_post(req, ev);
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}
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state->smbreq = smbreq;
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switch (in_ctl_code & IOCTL_DEV_TYPE_MASK) {
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case FSCTL_DFS:
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return smb2_ioctl_dfs(in_ctl_code, ev, req, state);
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break;
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case FSCTL_FILESYSTEM:
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return smb2_ioctl_filesys(in_ctl_code, ev, req, state);
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break;
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case FSCTL_NAMED_PIPE:
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return smb2_ioctl_named_pipe(in_ctl_code, ev, req, state);
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break;
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case FSCTL_NETWORK_FILESYSTEM:
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return smb2_ioctl_network_fs(in_ctl_code, ev, req, state);
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break;
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default:
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if (IS_IPC(smbreq->conn)) {
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tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
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} else {
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tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
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}
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return tevent_req_post(req, ev);
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break;
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}
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tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
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return tevent_req_post(req, ev);
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}
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static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *out_output,
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bool *disconnect)
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{
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NTSTATUS status = NT_STATUS_OK;
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struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
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struct smbd_smb2_ioctl_state);
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enum tevent_req_state req_state;
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uint64_t err;
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*disconnect = state->disconnect;
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if ((tevent_req_is_error(req, &req_state, &err) == false)
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|| (req_state == TEVENT_REQ_USER_ERROR)) {
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/*
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* Return output buffer to caller if the ioctl was successfully
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* processed, even if a user error occurred. Some ioctls return
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* data on failure.
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|
*/
|
|
*out_output = state->out_output;
|
|
talloc_steal(mem_ctx, out_output->data);
|
|
}
|
|
|
|
tevent_req_is_nterror(req, &status);
|
|
tevent_req_received(req);
|
|
return status;
|
|
}
|