| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | SMB2 client negprot handling
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| 5 |
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| 6 | Copyright (C) Andrew Tridgell 2005
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 | #include "libcli/raw/libcliraw.h"
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| 24 | #include "libcli/raw/raw_proto.h"
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| 25 | #include "libcli/smb2/smb2.h"
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| 26 | #include "libcli/smb2/smb2_calls.h"
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| 27 | #include "librpc/ndr/libndr.h"
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| 28 |
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| 29 | /*
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| 30 | send a negprot request
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| 31 | */
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| 32 | struct smb2_request *smb2_negprot_send(struct smb2_transport *transport,
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| 33 | struct smb2_negprot *io)
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| 34 | {
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| 35 | struct smb2_request *req;
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| 36 | uint16_t size = 0x24 + io->in.dialect_count*2;
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| 37 | enum ndr_err_code ndr_err;
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| 38 | int i;
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| 39 |
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| 40 | req = smb2_request_init(transport, SMB2_OP_NEGPROT, size, false, 0);
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| 41 | if (req == NULL) return NULL;
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| 42 |
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| 43 |
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| 44 | SSVAL(req->out.body, 0x00, 0x24);
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| 45 | SSVAL(req->out.body, 0x02, io->in.dialect_count);
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| 46 | SSVAL(req->out.body, 0x04, io->in.security_mode);
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| 47 | SSVAL(req->out.body, 0x06, io->in.reserved);
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| 48 | SIVAL(req->out.body, 0x08, io->in.capabilities);
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| 49 | ndr_err = smbcli_push_guid(req->out.body, 0x0C, &io->in.client_guid);
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| 50 | if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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| 51 | talloc_free(req);
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| 52 | return NULL;
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| 53 | }
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| 54 | smbcli_push_nttime(req->out.body, 0x1C, io->in.start_time);
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| 55 | for (i=0;i<io->in.dialect_count;i++) {
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| 56 | SSVAL(req->out.body, 0x24 + i*2, io->in.dialects[i]);
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| 57 | }
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| 58 |
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| 59 | smb2_transport_send(req);
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| 60 |
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| 61 | return req;
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| 62 | }
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| 63 |
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| 64 | /*
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| 65 | recv a negprot reply
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| 66 | */
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| 67 | NTSTATUS smb2_negprot_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,
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| 68 | struct smb2_negprot *io)
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| 69 | {
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| 70 | NTSTATUS status;
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| 71 | enum ndr_err_code ndr_err;
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| 72 |
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| 73 | if (!smb2_request_receive(req) ||
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| 74 | smb2_request_is_error(req)) {
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| 75 | return smb2_request_destroy(req);
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| 76 | }
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| 77 |
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| 78 | SMB2_CHECK_PACKET_RECV(req, 0x40, true);
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| 79 |
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| 80 | io->out.security_mode = SVAL(req->in.body, 0x02);
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| 81 | io->out.dialect_revision = SVAL(req->in.body, 0x04);
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| 82 | io->out.reserved = SVAL(req->in.body, 0x06);
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| 83 | ndr_err = smbcli_pull_guid(req->in.body, 0x08, &io->in.client_guid);
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| 84 | if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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| 85 | smb2_request_destroy(req);
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| 86 | return NT_STATUS_INTERNAL_ERROR;
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| 87 | }
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| 88 | io->out.capabilities = IVAL(req->in.body, 0x18);
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| 89 | io->out.max_transact_size = IVAL(req->in.body, 0x1C);
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| 90 | io->out.max_read_size = IVAL(req->in.body, 0x20);
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| 91 | io->out.max_write_size = IVAL(req->in.body, 0x24);
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| 92 | io->out.system_time = smbcli_pull_nttime(req->in.body, 0x28);
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| 93 | io->out.server_start_time = smbcli_pull_nttime(req->in.body, 0x30);
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| 94 | io->out.reserved2 = IVAL(req->in.body, 0x3C);
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| 95 |
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| 96 | status = smb2_pull_o16s16_blob(&req->in, mem_ctx, req->in.body+0x38, &io->out.secblob);
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| 97 | if (!NT_STATUS_IS_OK(status)) {
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| 98 | smb2_request_destroy(req);
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| 99 | return status;
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| 100 | }
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| 101 |
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| 102 | return smb2_request_destroy(req);
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| 103 | }
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| 104 |
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| 105 | /*
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| 106 | sync negprot request
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| 107 | */
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| 108 | NTSTATUS smb2_negprot(struct smb2_transport *transport,
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| 109 | TALLOC_CTX *mem_ctx, struct smb2_negprot *io)
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| 110 | {
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| 111 | struct smb2_request *req = smb2_negprot_send(transport, io);
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| 112 | return smb2_negprot_recv(req, mem_ctx, io);
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| 113 | }
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