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 #include "param/param.h"
  27
  28 static const struct {
  29         enum protocol_types prot;
  30         const char *name;
  31 } prots[] = {
  32         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  33         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  34         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  35         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  36         {PROTOCOL_LANMAN1,"Windows for Workgroups 3.1a"},
  37         {PROTOCOL_LANMAN2,"LM1.2X002"},
  38         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  39         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  40         {PROTOCOL_LANMAN2,"Samba"},
  41         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  42         {PROTOCOL_NT1,"NT LM 0.12"},
  43 };
  44
  45 /*
  46   Send a negprot command.
  47 */
  48 struct smbcli_request *smb_raw_negotiate_send(struct smbcli_transport *transport,
  49                                               bool unicode,
  50                                               int maxprotocol)
  51 {
  52         struct smbcli_request *req;
  53         int i;
  54         uint16_t flags2 = 0;
  55
  56         req = smbcli_request_setup_transport(transport, SMBnegprot, 0, 0);
  57         if (!req) {
  58                 return NULL;
  59         }
  60
  61         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
  62         if (unicode) {
  63                 flags2 |= FLAGS2_UNICODE_STRINGS;
  64         }
  65         flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
  66         flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
  67         flags2 |= FLAGS2_IS_LONG_NAME;
  68
  69         if (transport->options.use_spnego) {
  70                 flags2 |= FLAGS2_EXTENDED_SECURITY;
  71         }
  72
  73         SSVAL(req->out.hdr,HDR_FLG2, flags2);
  74
  75         /* setup the protocol strings */
  76         for (i=0; i < ARRAY_SIZE(prots) && prots[i].prot <= maxprotocol; i++) {
  77                 smbcli_req_append_bytes(req, (const uint8_t *)"\2", 1);
  78                 smbcli_req_append_string(req, prots[i].name, STR_TERMINATE | STR_ASCII);
  79         }
  80
  81         if (!smbcli_request_send(req)) {
  82                 smbcli_request_destroy(req);
  83                 return NULL;
  84         }
  85
  86         return req;
  87 }
  88
  89 /*
  90  Send a negprot command.
  91 */
  92 NTSTATUS smb_raw_negotiate_recv(struct smbcli_request *req)
  93 {
  94         struct smbcli_transport *transport = req->transport;
  95         int protocol;
  96
  97         if (!smbcli_request_receive(req) ||
  98             smbcli_request_is_error(req)) {
  99                 return smbcli_request_destroy(req);
 100         }
 101
 102         SMBCLI_CHECK_MIN_WCT(req, 1);
 103
 104         protocol = SVALS(req->in.vwv, VWV(0));
 105
 106         if (protocol >= ARRAY_SIZE(prots) || protocol < 0) {
 107                 req->status = NT_STATUS_UNSUCCESSFUL;
 108                 return smbcli_request_destroy(req);
 109         }
 110
 111         transport->negotiate.protocol = prots[protocol].prot;
 112
 113         if (transport->negotiate.protocol >= PROTOCOL_NT1) {
 114                 NTTIME ntt;
 115
 116                 /* NT protocol */
 117                 SMBCLI_CHECK_WCT(req, 17);
 118                 transport->negotiate.sec_mode = CVAL(req->in.vwv,VWV(1));
 119                 transport->negotiate.max_mux  = SVAL(req->in.vwv,VWV(1)+1);
 120                 transport->negotiate.max_xmit = IVAL(req->in.vwv,VWV(3)+1);
 121                 transport->negotiate.sesskey  = IVAL(req->in.vwv,VWV(7)+1);
 122                 transport->negotiate.capabilities = IVAL(req->in.vwv,VWV(9)+1);
 123
 124                 /* this time arrives in real GMT */
 125                 ntt = smbcli_pull_nttime(req->in.vwv, VWV(11)+1);
 126                 transport->negotiate.server_time = nt_time_to_unix(ntt);
 127                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(15)+1) * 60;
 128                 transport->negotiate.key_len = CVAL(req->in.vwv,VWV(16)+1);
 129
 130                 if (transport->negotiate.capabilities & CAP_EXTENDED_SECURITY) {
 131                         if (req->in.data_size < 16) {
 132                                 goto failed;
 133                         }
 134                         transport->negotiate.server_guid = smbcli_req_pull_blob(req, transport, req->in.data, 16);
 135                         transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data + 16, req->in.data_size - 16);
 136                 } else {
 137                         if (req->in.data_size < (transport->negotiate.key_len)) {
 138                                 goto failed;
 139                         }
 140                         transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data, transport->negotiate.key_len);
 141                         smbcli_req_pull_string(req, transport, &transport->negotiate.server_domain,
 142                                             req->in.data+transport->negotiate.key_len,
 143                                             req->in.data_size-transport->negotiate.key_len, STR_UNICODE|STR_NOALIGN);
 144                         /* here comes the server name */
 145                 }
 146
 147                 if (transport->negotiate.capabilities & CAP_RAW_MODE) {
 148                         transport->negotiate.readbraw_supported = true;
 149                         transport->negotiate.writebraw_supported = true;
 150                 }
 151         } else if (transport->negotiate.protocol >= PROTOCOL_LANMAN1) {
 152                 SMBCLI_CHECK_WCT(req, 13);
 153                 transport->negotiate.sec_mode = SVAL(req->in.vwv,VWV(1));
 154                 transport->negotiate.max_xmit = SVAL(req->in.vwv,VWV(2));
 155                 transport->negotiate.sesskey =  IVAL(req->in.vwv,VWV(6));
 156                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(10)) * 60;
 157
 158                 /* this time is converted to GMT by raw_pull_dos_date */
 159                 transport->negotiate.server_time = raw_pull_dos_date(transport,
 160                                                                      req->in.vwv+VWV(8));
 161                 if ((SVAL(req->in.vwv,VWV(5)) & 0x1)) {
 162                         transport->negotiate.readbraw_supported = 1;
 163                 }
 164                 if ((SVAL(req->in.vwv,VWV(5)) & 0x2)) {
 165                         transport->negotiate.writebraw_supported = 1;
 166                 }
 167                 transport->negotiate.secblob = smbcli_req_pull_blob(req, transport,
 168                                                                  req->in.data, req->in.data_size);
 169         } else {
 170                 /* the old core protocol */
 171                 transport->negotiate.sec_mode = 0;
 172                 transport->negotiate.server_time = time(NULL);
 173                 transport->negotiate.max_xmit = transport->options.max_xmit;
 174                 transport->negotiate.server_zone = get_time_zone(transport->negotiate.server_time);
 175         }
 176
 177         /* a way to force ascii SMB */
 178         if (!lp_unicode(global_loadparm)) {
 179                 transport->negotiate.capabilities &= ~CAP_UNICODE;
 180         }
 181
 182         if (!lp_nt_status_support(global_loadparm)) {
 183                 transport->negotiate.capabilities &= ~CAP_STATUS32;
 184         }
 185
 186 failed:
 187         return smbcli_request_destroy(req);
 188 }
 189
 190
 191 /*
 192  Send a negprot command (sync interface)
 193 */
 194 NTSTATUS smb_raw_negotiate(struct smbcli_transport *transport, bool unicode, int maxprotocol)
 195 {
 196         struct smbcli_request *req = smb_raw_negotiate_send(transport, unicode, maxprotocol);
 197         return smb_raw_negotiate_recv(req);
 198 }