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