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 "libcli/raw/raw_proto.h"
  26 #include "system/time.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 #if 0
  44         /* we don't yet handle chaining a SMB transport onto SMB2 */
  45         {PROTOCOL_SMB2_02,"SMB 2.002"},
  46 #endif
  47 };
  48
  49 /*
  50   Send a negprot command.
  51 */
  52 struct smbcli_request *smb_raw_negotiate_send(struct smbcli_transport *transport,
  53                                               bool unicode,
  54                                               int maxprotocol)
  55 {
  56         struct smbcli_request *req;
  57         int i;
  58         uint16_t flags2 = 0;
  59
  60         req = smbcli_request_setup_transport(transport, SMBnegprot, 0, 0);
  61         if (!req) {
  62                 return NULL;
  63         }
  64
  65         if (transport->options.ntstatus_support) {
  66                 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
  67         }
  68
  69         if (unicode) {
  70                 flags2 |= FLAGS2_UNICODE_STRINGS;
  71         }
  72         flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
  73         flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
  74         flags2 |= FLAGS2_IS_LONG_NAME;
  75
  76         if (transport->options.use_spnego) {
  77                 flags2 |= FLAGS2_EXTENDED_SECURITY;
  78         }
  79
  80         SSVAL(req->out.hdr,HDR_FLG2, flags2);
  81
  82         /* setup the protocol strings */
  83         for (i=0; i < ARRAY_SIZE(prots) && prots[i].prot <= maxprotocol; i++) {
  84                 smbcli_req_append_bytes(req, (const uint8_t *)"\2", 1);
  85                 smbcli_req_append_string(req, prots[i].name, STR_TERMINATE | STR_ASCII);
  86         }
  87
  88         if (!smbcli_request_send(req)) {
  89                 smbcli_request_destroy(req);
  90                 return NULL;
  91         }
  92
  93         return req;
  94 }
  95
  96 /*
  97  Send a negprot command.
  98 */
  99 NTSTATUS smb_raw_negotiate_recv(struct smbcli_request *req)
 100 {
 101         struct smbcli_transport *transport = req->transport;
 102         int protocol;
 103
 104         if (!smbcli_request_receive(req) ||
 105             smbcli_request_is_error(req)) {
 106                 return smbcli_request_destroy(req);
 107         }
 108
 109         SMBCLI_CHECK_MIN_WCT(req, 1);
 110
 111         protocol = SVALS(req->in.vwv, VWV(0));
 112
 113         if (protocol >= ARRAY_SIZE(prots) || protocol < 0) {
 114                 req->status = NT_STATUS_UNSUCCESSFUL;
 115                 return smbcli_request_destroy(req);
 116         }
 117
 118         transport->negotiate.protocol = prots[protocol].prot;
 119
 120         if (transport->negotiate.protocol >= PROTOCOL_NT1) {
 121                 NTTIME ntt;
 122
 123                 /* NT protocol */
 124                 SMBCLI_CHECK_WCT(req, 17);
 125                 transport->negotiate.sec_mode = CVAL(req->in.vwv,VWV(1));
 126                 transport->negotiate.max_mux  = SVAL(req->in.vwv,VWV(1)+1);
 127                 transport->negotiate.max_xmit = IVAL(req->in.vwv,VWV(3)+1);
 128                 transport->negotiate.sesskey  = IVAL(req->in.vwv,VWV(7)+1);
 129                 transport->negotiate.capabilities = IVAL(req->in.vwv,VWV(9)+1);
 130
 131                 /* this time arrives in real GMT */
 132                 ntt = smbcli_pull_nttime(req->in.vwv, VWV(11)+1);
 133                 transport->negotiate.server_time = nt_time_to_unix(ntt);
 134                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(15)+1) * 60;
 135                 transport->negotiate.key_len = CVAL(req->in.vwv,VWV(16)+1);
 136
 137                 if (transport->negotiate.capabilities & CAP_EXTENDED_SECURITY) {
 138                         if (req->in.data_size < 16) {
 139                                 goto failed;
 140                         }
 141                         transport->negotiate.server_guid = smbcli_req_pull_blob(&req->in.bufinfo, transport, req->in.data, 16);
 142                         transport->negotiate.secblob = smbcli_req_pull_blob(&req->in.bufinfo, transport, req->in.data + 16, req->in.data_size - 16);
 143                 } else {
 144                         if (req->in.data_size < (transport->negotiate.key_len)) {
 145                                 goto failed;
 146                         }
 147                         transport->negotiate.secblob = smbcli_req_pull_blob(&req->in.bufinfo, transport, req->in.data, transport->negotiate.key_len);
 148                         smbcli_req_pull_string(&req->in.bufinfo, transport, &transport->negotiate.server_domain,
 149                                             req->in.data+transport->negotiate.key_len,
 150                                             req->in.data_size-transport->negotiate.key_len, STR_UNICODE|STR_NOALIGN);
 151                         /* here comes the server name */
 152                 }
 153
 154                 if (transport->negotiate.capabilities & CAP_RAW_MODE) {
 155                         transport->negotiate.readbraw_supported = true;
 156                         transport->negotiate.writebraw_supported = true;
 157                 }
 158
 159                 if (transport->negotiate.capabilities & CAP_LOCK_AND_READ)
 160                         transport->negotiate.lockread_supported = true;
 161         } else if (transport->negotiate.protocol >= PROTOCOL_LANMAN1) {
 162                 SMBCLI_CHECK_WCT(req, 13);
 163                 transport->negotiate.sec_mode = SVAL(req->in.vwv,VWV(1));
 164                 transport->negotiate.max_xmit = SVAL(req->in.vwv,VWV(2));
 165                 transport->negotiate.sesskey =  IVAL(req->in.vwv,VWV(6));
 166                 transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(10)) * 60;
 167
 168                 /* this time is converted to GMT by raw_pull_dos_date */
 169                 transport->negotiate.server_time = raw_pull_dos_date(transport,
 170                                                                      req->in.vwv+VWV(8));
 171                 if ((SVAL(req->in.vwv,VWV(5)) & 0x1)) {
 172                         transport->negotiate.readbraw_supported = 1;
 173                 }
 174                 if ((SVAL(req->in.vwv,VWV(5)) & 0x2)) {
 175                         transport->negotiate.writebraw_supported = 1;
 176                 }
 177                 transport->negotiate.secblob = smbcli_req_pull_blob(&req->in.bufinfo, transport,
 178                                                                  req->in.data, req->in.data_size);
 179         } else {
 180                 /* the old core protocol */
 181                 transport->negotiate.sec_mode = 0;
 182                 transport->negotiate.server_time = time(NULL);
 183                 transport->negotiate.max_xmit = transport->options.max_xmit;
 184                 transport->negotiate.server_zone = get_time_zone(transport->negotiate.server_time);
 185         }
 186
 187         /* a way to force ascii SMB */
 188         if (!transport->options.unicode) {
 189                 transport->negotiate.capabilities &= ~CAP_UNICODE;
 190         }
 191
 192         if (!transport->options.ntstatus_support) {
 193                 transport->negotiate.capabilities &= ~CAP_STATUS32;
 194         }
 195
 196         if (!transport->options.use_level2_oplocks) {
 197                 transport->negotiate.capabilities &= ~CAP_LEVEL_II_OPLOCKS;
 198         }
 199
 200 failed:
 201         return smbcli_request_destroy(req);
 202 }
 203
 204
 205 /*
 206  Send a negprot command (sync interface)
 207 */
 208 NTSTATUS smb_raw_negotiate(struct smbcli_transport *transport, bool unicode, int maxprotocol)
 209 {
 210         struct smbcli_request *req = smb_raw_negotiate_send(transport, unicode, maxprotocol);
 211         return smb_raw_negotiate_recv(req);
 212 }