source3/winbindd/winbindd_creds.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - cached credentials funcions
   5
   6    Copyright (C) Guenther Deschner 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "winbindd.h"
  24 #include "../libcli/auth/libcli_auth.h"
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_WINBIND
  27
  28 #define MAX_CACHED_LOGINS 10
  29
  30 NTSTATUS winbindd_get_creds(struct winbindd_domain *domain,
  31                             TALLOC_CTX *mem_ctx,
  32                             const struct dom_sid *sid,
  33                             struct netr_SamInfo3 **info3,
  34                             const uint8 *cached_nt_pass[NT_HASH_LEN],
  35                             const uint8 *cred_salt[NT_HASH_LEN])
  36 {
  37         struct netr_SamInfo3 *info;
  38         NTSTATUS status;
  39
  40         status = wcache_get_creds(domain, mem_ctx, sid, cached_nt_pass, cred_salt);
  41         if (!NT_STATUS_IS_OK(status)) {
  42                 return status;
  43         }
  44
  45         info = netsamlogon_cache_get(mem_ctx, sid);
  46         if (info == NULL) {
  47                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  48         }
  49
  50         *info3 = info;
  51
  52         return NT_STATUS_OK;
  53 }
  54
  55
  56 NTSTATUS winbindd_store_creds(struct winbindd_domain *domain,
  57                               const char *user,
  58                               const char *pass,
  59                               struct netr_SamInfo3 *info3)
  60 {
  61         NTSTATUS status;
  62         uchar nt_pass[NT_HASH_LEN];
  63         struct dom_sid cred_sid;
  64
  65         if (info3 != NULL) {
  66
  67                 sid_compose(&cred_sid, info3->base.domain_sid,
  68                             info3->base.rid);
  69                 info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
  70
  71         } else if (user != NULL) {
  72
  73                 /* do lookup ourself */
  74
  75                 enum lsa_SidType type;
  76
  77                 if (!lookup_cached_name(domain->name,
  78                                         user,
  79                                         &cred_sid,
  80                                         &type)) {
  81                         return NT_STATUS_NO_SUCH_USER;
  82                 }
  83         } else {
  84                 return NT_STATUS_INVALID_PARAMETER;
  85         }
  86
  87         if (pass) {
  88
  89                 int count = 0;
  90
  91                 status = wcache_count_cached_creds(domain, &count);
  92                 if (!NT_STATUS_IS_OK(status)) {
  93                         return status;
  94                 }
  95
  96                 DEBUG(11,("we have %d cached creds\n", count));
  97
  98                 if (count + 1 > MAX_CACHED_LOGINS) {
  99
 100                         DEBUG(10,("need to delete the oldest cached login\n"));
 101
 102                         status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
 103                         if (!NT_STATUS_IS_OK(status)) {
 104                                 DEBUG(10,("failed to remove oldest cached cred: %s\n",
 105                                         nt_errstr(status)));
 106                                 return status;
 107                         }
 108                 }
 109
 110                 E_md4hash(pass, nt_pass);
 111
 112                 dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
 113
 114                 status = wcache_save_creds(domain, &cred_sid, nt_pass);
 115                 if (!NT_STATUS_IS_OK(status)) {
 116                         return status;
 117                 }
 118         }
 119
 120         if (info3 != NULL && user != NULL) {
 121                 if (!netsamlogon_cache_store(user, info3)) {
 122                         return NT_STATUS_ACCESS_DENIED;
 123                 }
 124         }
 125
 126         return NT_STATUS_OK;
 127 }
 128
 129 NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
 130                                         const char *user,
 131                                         const char *pass,
 132                                         struct netr_SamInfo3 *info3)
 133 {
 134         return winbindd_store_creds(domain, user, pass, info3);
 135 }
 136
 137 NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
 138                                        const char *user,
 139                                        const char *pass)
 140 {
 141         return winbindd_store_creds(domain, user, pass, NULL);
 142 }
 143
 144