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9c410118cb
Set to 64k by default. Jeremy.
182 lines
5.2 KiB
C
182 lines
5.2 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/globals.h"
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#include "../libcli/smb/smb_common.h"
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/*
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* this is the entry point if SMB2 is selected via
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* the SMB negprot
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*/
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void reply_smb2002(struct smb_request *req, uint16_t choice)
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{
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uint8_t *smb2_inbuf;
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uint8_t *smb2_hdr;
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uint8_t *smb2_body;
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uint8_t *smb2_dyn;
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size_t len = 4 + SMB2_HDR_BODY + 0x24 + 2;
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smb2_inbuf = talloc_zero_array(talloc_tos(), uint8_t, len);
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if (smb2_inbuf == NULL) {
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DEBUG(0, ("Could not push spnego blob\n"));
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reply_nterror(req, NT_STATUS_NO_MEMORY);
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return;
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}
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smb2_hdr = smb2_inbuf + 4;
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smb2_body = smb2_hdr + SMB2_HDR_BODY;
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smb2_dyn = smb2_body + 0x24;
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SIVAL(smb2_hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
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SIVAL(smb2_hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
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SSVAL(smb2_body, 0x00, 0x0024); /* struct size */
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SSVAL(smb2_body, 0x02, 0x0001); /* dialect count */
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SSVAL(smb2_dyn, 0x00, 0x0202); /* dialect 2.002 */
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req->outbuf = NULL;
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smbd_smb2_first_negprot(smbd_server_conn, smb2_inbuf, len);
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return;
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}
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NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
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{
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const uint8_t *inbody;
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const uint8_t *indyn = NULL;
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int i = req->current_idx;
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DATA_BLOB outbody;
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DATA_BLOB outdyn;
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DATA_BLOB negprot_spnego_blob;
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uint16_t security_offset;
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DATA_BLOB security_buffer;
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size_t expected_body_size = 0x24;
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size_t body_size;
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size_t expected_dyn_size = 0;
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size_t c;
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uint16_t security_mode;
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uint16_t dialect_count;
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uint16_t dialect = 0;
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uint32_t capabilities;
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/* TODO: drop the connection with INVALI_PARAMETER */
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if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
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body_size = SVAL(inbody, 0x00);
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if (body_size != expected_body_size) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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dialect_count = SVAL(inbody, 0x02);
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if (dialect_count == 0) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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expected_dyn_size = dialect_count * 2;
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if (req->in.vector[i+2].iov_len < expected_dyn_size) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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indyn = (const uint8_t *)req->in.vector[i+2].iov_base;
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for (c=0; c < dialect_count; c++) {
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dialect = SVAL(indyn, c*2);
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if (dialect == SMB2_DIALECT_REVISION_202) {
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break;
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}
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}
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if (dialect != SMB2_DIALECT_REVISION_202) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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set_Protocol(PROTOCOL_SMB2);
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if (get_remote_arch() != RA_SAMBA) {
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set_remote_arch(RA_VISTA);
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}
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/* negprot_spnego() returns a the server guid in the first 16 bytes */
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negprot_spnego_blob = negprot_spnego();
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if (negprot_spnego_blob.data == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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}
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talloc_steal(req, negprot_spnego_blob.data);
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if (negprot_spnego_blob.length < 16) {
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return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
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}
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security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
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if (lp_server_signing() == Required) {
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security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
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}
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capabilities = 0;
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if (lp_host_msdfs()) {
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capabilities |= SMB2_CAP_DFS;
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}
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security_offset = SMB2_HDR_BODY + 0x40;
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#if 1
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/* Try SPNEGO auth... */
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security_buffer = data_blob_const(negprot_spnego_blob.data + 16,
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negprot_spnego_blob.length - 16);
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#else
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/* for now we want raw NTLMSSP */
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security_buffer = data_blob_const(NULL, 0);
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#endif
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outbody = data_blob_talloc(req->out.vector, NULL, 0x40);
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if (outbody.data == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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}
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SSVAL(outbody.data, 0x00, 0x40 + 1); /* struct size */
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SSVAL(outbody.data, 0x02,
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security_mode); /* security mode */
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SSVAL(outbody.data, 0x04, dialect); /* dialect revision */
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SSVAL(outbody.data, 0x06, 0); /* reserved */
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memcpy(outbody.data + 0x08,
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negprot_spnego_blob.data, 16); /* server guid */
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SIVAL(outbody.data, 0x18,
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capabilities); /* capabilities */
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SIVAL(outbody.data, 0x1C, lp_smb2_max_trans()); /* max transact size */
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SIVAL(outbody.data, 0x20, lp_smb2_max_read()); /* max read size */
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SIVAL(outbody.data, 0x24, lp_smb2_max_write()); /* max write size */
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SBVAL(outbody.data, 0x28, 0); /* system time */
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SBVAL(outbody.data, 0x30, 0); /* server start time */
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SSVAL(outbody.data, 0x38,
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security_offset); /* security buffer offset */
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SSVAL(outbody.data, 0x3A,
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security_buffer.length); /* security buffer length */
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SIVAL(outbody.data, 0x3C, 0); /* reserved */
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outdyn = security_buffer;
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return smbd_smb2_request_done(req, outbody, &outdyn);
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}
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