source4/auth/auth_sam_reply.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Convert a server info struct into the form for PAC and NETLOGON replies
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
   7    Copyright (C) Stefan Metzmacher <metze@samba.org>  2005
   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 "auth/auth.h"
  25 #include "libcli/security/security.h"
  26 #include "auth/auth_sam_reply.h"
  27
  28 NTSTATUS auth_convert_server_info_sambaseinfo(TALLOC_CTX *mem_ctx,
  29                                               struct auth_serversupplied_info *server_info,
  30                                               struct netr_SamBaseInfo **_sam)
  31 {
  32         struct netr_SamBaseInfo *sam = talloc_zero(mem_ctx, struct netr_SamBaseInfo);
  33         NT_STATUS_HAVE_NO_MEMORY(sam);
  34
  35         sam->domain_sid = dom_sid_dup(mem_ctx, server_info->account_sid);
  36         NT_STATUS_HAVE_NO_MEMORY(sam->domain_sid);
  37         sam->domain_sid->num_auths--;
  38
  39         sam->last_logon = server_info->last_logon;
  40         sam->last_logoff =  server_info->last_logoff;
  41         sam->acct_expiry = server_info->acct_expiry;
  42         sam->last_password_change = server_info->last_password_change;
  43         sam->allow_password_change = server_info->allow_password_change;
  44         sam->force_password_change = server_info->force_password_change;
  45
  46         sam->account_name.string = server_info->account_name;
  47         sam->full_name.string = server_info->full_name;
  48         sam->logon_script.string = server_info->logon_script;
  49         sam->profile_path.string = server_info->profile_path;
  50         sam->home_directory.string = server_info->home_directory;
  51         sam->home_drive.string = server_info->home_drive;
  52
  53         sam->logon_count = server_info->logon_count;
  54         sam->bad_password_count = sam->bad_password_count;
  55         sam->rid = server_info->account_sid->sub_auths[server_info->account_sid->num_auths-1];
  56         sam->primary_gid = server_info->primary_group_sid->sub_auths[server_info->primary_group_sid->num_auths-1];
  57
  58         sam->groups.count = 0;
  59         sam->groups.rids = NULL;
  60
  61         if (server_info->n_domain_groups > 0) {
  62                 size_t i;
  63                 sam->groups.rids = talloc_array(sam, struct samr_RidWithAttribute,
  64                                                 server_info->n_domain_groups);
  65
  66                 if (sam->groups.rids == NULL)
  67                         return NT_STATUS_NO_MEMORY;
  68
  69                 for (i=0; i<server_info->n_domain_groups; i++) {
  70                         struct dom_sid *group_sid = server_info->domain_groups[i];
  71                         if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
  72                                 /* We handle this elsewhere */
  73                                 continue;
  74                         }
  75                         sam->groups.rids[sam->groups.count].rid =
  76                                 group_sid->sub_auths[group_sid->num_auths-1];
  77
  78                         sam->groups.rids[sam->groups.count].attributes =
  79                                 SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
  80                         sam->groups.count += 1;
  81                 }
  82         }
  83
  84         sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
  85         sam->acct_flags = server_info->acct_flags;
  86         sam->logon_server.string = server_info->logon_server;
  87         sam->domain.string = server_info->domain_name;
  88
  89         ZERO_STRUCT(sam->unknown);
  90
  91         ZERO_STRUCT(sam->key);
  92         if (server_info->user_session_key.length == sizeof(sam->key.key)) {
  93                 memcpy(sam->key.key, server_info->user_session_key.data, sizeof(sam->key.key));
  94         }
  95
  96         ZERO_STRUCT(sam->LMSessKey);
  97         if (server_info->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
  98                 memcpy(sam->LMSessKey.key, server_info->lm_session_key.data,
  99                        sizeof(sam->LMSessKey.key));
 100         }
 101
 102         *_sam = sam;
 103
 104         return NT_STATUS_OK;
 105 }
 106
 107 /* Note that the validity of the _sam3 structure is only as long as
 108  * the server_info it was generated from */
 109 NTSTATUS auth_convert_server_info_saminfo3(TALLOC_CTX *mem_ctx,
 110                                            struct auth_serversupplied_info *server_info,
 111                                            struct netr_SamInfo3 **_sam3)
 112 {
 113         struct netr_SamBaseInfo *sam;
 114         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 115         NTSTATUS status;
 116         size_t i;
 117         NT_STATUS_HAVE_NO_MEMORY(sam3);
 118
 119         status = auth_convert_server_info_sambaseinfo(mem_ctx, server_info, &sam);
 120         if (!NT_STATUS_IS_OK(status)) {
 121                 return status;
 122         }
 123         sam3->base = *sam;
 124         sam3->sidcount  = 0;
 125         sam3->sids      = NULL;
 126
 127
 128         sam3->sids = talloc_array(sam, struct netr_SidAttr,
 129                                   server_info->n_domain_groups);
 130         NT_STATUS_HAVE_NO_MEMORY(sam3->sids);
 131
 132         for (i=0; i<server_info->n_domain_groups; i++) {
 133                 if (dom_sid_in_domain(sam->domain_sid, server_info->domain_groups[i])) {
 134                         continue;
 135                 }
 136                 sam3->sids[sam3->sidcount].sid = talloc_reference(sam3->sids,server_info->domain_groups[i]);
 137                 sam3->sids[sam3->sidcount].attributes =
 138                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 139                 sam3->sidcount += 1;
 140         }
 141         if (sam3->sidcount) {
 142                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
 143         } else {
 144                 sam3->sids = NULL;
 145         }
 146         *_sam3 = sam3;
 147
 148         return NT_STATUS_OK;
 149 }
 150
 151 /**
 152  * Make a server_info struct from the info3 returned by a domain logon
 153  */
 154 NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
 155                                               const char *account_name,
 156                                               uint16_t validation_level,
 157                                               union netr_Validation *validation,
 158                                               struct auth_serversupplied_info **_server_info)
 159 {
 160         struct auth_serversupplied_info *server_info;
 161         struct netr_SamBaseInfo *base = NULL;
 162         uint32_t i;
 163
 164         switch (validation_level) {
 165         case 2:
 166                 if (!validation || !validation->sam2) {
 167                         return NT_STATUS_INVALID_PARAMETER;
 168                 }
 169                 base = &validation->sam2->base;
 170                 break;
 171         case 3:
 172                 if (!validation || !validation->sam3) {
 173                         return NT_STATUS_INVALID_PARAMETER;
 174                 }
 175                 base = &validation->sam3->base;
 176                 break;
 177         case 6:
 178                 if (!validation || !validation->sam6) {
 179                         return NT_STATUS_INVALID_PARAMETER;
 180                 }
 181                 base = &validation->sam6->base;
 182                 break;
 183         default:
 184                 return NT_STATUS_INVALID_LEVEL;
 185         }
 186
 187         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 188         NT_STATUS_HAVE_NO_MEMORY(server_info);
 189
 190         /*
 191            Here is where we should check the list of
 192            trusted domains, and verify that the SID
 193            matches.
 194         */
 195         server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
 196         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 197
 198
 199         server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
 200         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 201
 202         server_info->n_domain_groups = base->groups.count;
 203         if (base->groups.count) {
 204                 server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
 205                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
 206         } else {
 207                 server_info->domain_groups = NULL;
 208         }
 209
 210         for (i = 0; i < base->groups.count; i++) {
 211                 server_info->domain_groups[i] = dom_sid_add_rid(server_info->domain_groups, base->domain_sid, base->groups.rids[i].rid);
 212                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
 213         }
 214
 215         /* Copy 'other' sids.  We need to do sid filtering here to
 216            prevent possible elevation of privileges.  See:
 217
 218            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 219          */
 220
 221         if (validation_level == 3) {
 222                 struct dom_sid **dgrps = server_info->domain_groups;
 223                 size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
 224                 size_t n_dgrps = server_info->n_domain_groups;
 225
 226                 if (validation->sam3->sidcount > 0) {
 227                         dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
 228                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 229
 230                         for (i = 0; i < validation->sam3->sidcount; i++) {
 231                                 dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
 232                         }
 233                 }
 234
 235                 server_info->n_domain_groups = sidcount;
 236                 server_info->domain_groups = dgrps;
 237
 238                 /* Where are the 'global' sids?... */
 239         }
 240
 241         if (base->account_name.string) {
 242                 server_info->account_name = talloc_reference(server_info, base->account_name.string);
 243         } else {
 244                 server_info->account_name = talloc_strdup(server_info, account_name);
 245                 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 246         }
 247
 248         server_info->domain_name = talloc_reference(server_info, base->domain.string);
 249         server_info->full_name = talloc_reference(server_info, base->full_name.string);
 250         server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
 251         server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
 252         server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
 253         server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
 254         server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
 255         server_info->last_logon = base->last_logon;
 256         server_info->last_logoff = base->last_logoff;
 257         server_info->acct_expiry = base->acct_expiry;
 258         server_info->last_password_change = base->last_password_change;
 259         server_info->allow_password_change = base->allow_password_change;
 260         server_info->force_password_change = base->force_password_change;
 261         server_info->logon_count = base->logon_count;
 262         server_info->bad_password_count = base->bad_password_count;
 263         server_info->acct_flags = base->acct_flags;
 264
 265         server_info->authenticated = true;
 266
 267         /* ensure we are never given NULL session keys */
 268
 269         if (all_zero(base->key.key, sizeof(base->key.key))) {
 270                 server_info->user_session_key = data_blob(NULL, 0);
 271         } else {
 272                 server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
 273                 NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 274         }
 275
 276         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 277                 server_info->lm_session_key = data_blob(NULL, 0);
 278         } else {
 279                 server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 280                 NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 281         }
 282
 283         ZERO_STRUCT(server_info->pac_srv_sig);
 284         ZERO_STRUCT(server_info->pac_kdc_sig);
 285
 286         *_server_info = server_info;
 287         return NT_STATUS_OK;
 288 }
 289
 290 /**
 291  * Make a server_info struct from the PAC_LOGON_INFO supplied in the krb5 logon
 292  */
 293 NTSTATUS make_server_info_pac(TALLOC_CTX *mem_ctx,
 294                               struct PAC_LOGON_INFO *pac_logon_info,
 295                               struct auth_serversupplied_info **_server_info)
 296 {
 297         uint32_t i;
 298         NTSTATUS nt_status;
 299         union netr_Validation validation;
 300         struct auth_serversupplied_info *server_info;
 301
 302         validation.sam3 = &pac_logon_info->info3;
 303
 304         nt_status = make_server_info_netlogon_validation(mem_ctx, "", 3, &validation, &server_info);
 305         if (!NT_STATUS_IS_OK(nt_status)) {
 306                 return nt_status;
 307         }
 308
 309         if (pac_logon_info->res_groups.count > 0) {
 310                 struct dom_sid **rgrps;
 311                 size_t sidcount = server_info->n_domain_groups + pac_logon_info->res_groups.count;
 312                 server_info->domain_groups = rgrps
 313                         = talloc_realloc(server_info, server_info->domain_groups, struct dom_sid *, sidcount);
 314                 NT_STATUS_HAVE_NO_MEMORY(rgrps);
 315
 316                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 317                         size_t sid_idx = server_info->n_domain_groups + i;
 318                         rgrps[sid_idx]
 319                                 = dom_sid_add_rid(rgrps, pac_logon_info->res_group_dom_sid,
 320                                                   pac_logon_info->res_groups.rids[i].rid);
 321                         NT_STATUS_HAVE_NO_MEMORY(rgrps[server_info->n_domain_groups + sid_idx]);
 322                 }
 323         }
 324         *_server_info = server_info;
 325         return NT_STATUS_OK;
 326 }