source4/libcli/raw/rawnegotiate.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB client negotiate context management functions
   5
   6    Copyright (C) Andrew Tridgell 1994-2005
   7    Copyright (C) James Myers 2003 <myersjj@samba.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/raw/libcliraw.h"
  25 #include "system/time.h"
  26
  27 static const struct {
  28         enum protocol_types prot;
  29         const char *name;
  30 } prots[] = {
  31         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  32         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  33         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  34         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  35         {PROTOCOL_LANMAN1,"Windows for Workgroups 3.1a"},
  36         {PROTOCOL_LANMAN2,"LM1.2X002"},
  37         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  38         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  39         {PROTOCOL_LANMAN2,"Samba"},
  40         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  41         {PROTOCOL_NT1,"NT LM 0.12"},
  42 };
  43
  44 /*
  45   Send a negprot command.
  46 */
  47 struct smbcli_request *smb_raw_negotiate_send(struct smbcli_transport *transport,
  48                                               int maxprotocol)
  49 {
  50         struct smbcli_request *req;
  51         int i;
  52         uint16_t flags2 = 0;
  53
  54         req = smbcli_request_setup_transport(transport, SMBnegprot, 0, 0);
  55         if (!req) {
  56                 return NULL;
  57         }
  58
  59         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
  60         if (lp_unicode()) {
  61                 flags2 |= FLAGS2_UNICODE_STRINGS;
  62         }
  63         flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
  64         flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
  65         flags2 |= FLAGS2_IS_LONG_NAME;
  66
  67         if (transport->options.use_spnego) {
  68                 flags2 |= FLAGS2_EXTENDED_SECURITY;
  69         }
  70
  71         SSVAL(req->out.hdr,HDR_FLG2, flags2);
  72
  73         /* setup the protocol strings */
  74         for (i=0; i < ARRAY_SIZE(prots) && prots[i].prot <= maxprotocol; i++) {
  75                 smbcli_req_append_bytes(req, (const uint8_t *)"\2", 1);
  76                 smbcli_req_append_string(req, prots[i].name, STR_TERMINATE | STR_ASCII);
  77         }
  78
  79         if (!smbcli_request_send(req)) {
  80                 smbcli_request_destroy(req);
  81                 return NULL;
  82         }
  83
  84         return req;
  85 }
  86
  87 /*
  88  Send a negprot command.
  89 */
  90 NTSTATUS smb_raw_negotiate_recv(struct smbcli_request *req)
  91 {
  92         struct smbcli_transport *transport = req->transport;
  93         int protocol;
  94
  95         if (!smbcli_request_receive(req) ||
  96             smbcli_request_is_error(req)) {
  97                 return smbcli_request_destroy(req);
  98         }
  99
 100         SMBCLI_CHECK_MIN_WCT(req, 1);
 101
 102         protocol = SVALS(req->in.vwv, VWV(0));
 103
 104         if (protocol >= ARRAY_SIZE(prots) || protocol < 0) {
 105                 req->status = NT_STATUS_UNSUCCESSFUL;
 106                 return smbcli_request_destroy(req);
 107         }
 108
 109         transport->negotiate.protocol = prots[protocol].prot;
 110
 111         if (transport->negotiate.protocol >= PROTOCOL_NT1) {
 112                 NTTIME ntt;
 113
 114                 /* NT protocol */
 115                 SMBCLI_CHECK_WCT(req, 17);
 116                 transport->negotiate.sec_mode = CVAL(req->in.vwv,VWV(1));
 117                 transport->negotiate.max_mux  = SVAL(req->in.vwv,VWV(1)+1);
 118                 transport->negotiate.max_xmit = IVAL(req->in.vwv,VWV(3)+1);
 119                 transport->negotiate.sesskey  = IVAL(req->in.vwv,VWV(7)+1);
 120                 transport->negotiate.capabilities = IVAL(req->in.vwv,VWV(9)+1);
 121
 122                 /* this time arrives in real GMT */
 123                 ntt = smbcli_pull_nttime(req->in.vwv, VWV(11)+1);
 124                 transport->negotiate.server_time = nt_time_to_unix(ntt);
 125                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(15)+1) * 60;
 126                 transport->negotiate.key_len = CVAL(req->in.vwv,VWV(16)+1);
 127
 128                 if (transport->negotiate.capabilities & CAP_EXTENDED_SECURITY) {
 129                         if (req->in.data_size < 16) {
 130                                 goto failed;
 131                         }
 132                         transport->negotiate.server_guid = smbcli_req_pull_blob(req, transport, req->in.data, 16);
 133                         transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data + 16, req->in.data_size - 16);
 134                 } else {
 135                         if (req->in.data_size < (transport->negotiate.key_len)) {
 136                                 goto failed;
 137                         }
 138                         transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data, transport->negotiate.key_len);
 139                         smbcli_req_pull_string(req, transport, &transport->negotiate.server_domain,
 140                                             req->in.data+transport->negotiate.key_len,
 141                                             req->in.data_size-transport->negotiate.key_len, STR_UNICODE|STR_NOALIGN);
 142                         /* here comes the server name */
 143                 }
 144
 145                 if (transport->negotiate.capabilities & CAP_RAW_MODE) {
 146                         transport->negotiate.readbraw_supported = True;
 147                         transport->negotiate.writebraw_supported = True;
 148                 }
 149         } else if (transport->negotiate.protocol >= PROTOCOL_LANMAN1) {
 150                 SMBCLI_CHECK_WCT(req, 13);
 151                 transport->negotiate.sec_mode = SVAL(req->in.vwv,VWV(1));
 152                 transport->negotiate.max_xmit = SVAL(req->in.vwv,VWV(2));
 153                 transport->negotiate.sesskey =  IVAL(req->in.vwv,VWV(6));
 154                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(10)) * 60;
 155
 156                 /* this time is converted to GMT by raw_pull_dos_date */
 157                 transport->negotiate.server_time = raw_pull_dos_date(transport,
 158                                                                      req->in.vwv+VWV(8));
 159                 if ((SVAL(req->in.vwv,VWV(5)) & 0x1)) {
 160                         transport->negotiate.readbraw_supported = 1;
 161                 }
 162                 if ((SVAL(req->in.vwv,VWV(5)) & 0x2)) {
 163                         transport->negotiate.writebraw_supported = 1;
 164                 }
 165                 transport->negotiate.secblob = smbcli_req_pull_blob(req, transport,
 166                                                                  req->in.data, req->in.data_size);
 167         } else {
 168                 /* the old core protocol */
 169                 transport->negotiate.sec_mode = 0;
 170                 transport->negotiate.server_time = time(NULL);
 171                 transport->negotiate.max_xmit = transport->options.max_xmit;
 172                 transport->negotiate.server_zone = get_time_zone(transport->negotiate.server_time);
 173         }
 174
 175         /* a way to force ascii SMB */
 176         if (!lp_unicode()) {
 177                 transport->negotiate.capabilities &= ~CAP_UNICODE;
 178         }
 179
 180         if (!lp_nt_status_support()) {
 181                 transport->negotiate.capabilities &= ~CAP_STATUS32;
 182         }
 183
 184 failed:
 185         return smbcli_request_destroy(req);
 186 }
 187
 188
 189 /*
 190  Send a negprot command (sync interface)
 191 */
 192 NTSTATUS smb_raw_negotiate(struct smbcli_transport *transport, int maxprotocol)
 193 {
 194         struct smbcli_request *req = smb_raw_negotiate_send(transport, maxprotocol);
 195         return smb_raw_negotiate_recv(req);
 196 }