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 #include "../libcli/security/security.h"
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_WINBIND
  28
  29 #define MAX_CACHED_LOGINS 10
  30
  31 NTSTATUS winbindd_get_creds(struct winbindd_domain *domain,
  32                             TALLOC_CTX *mem_ctx,
  33                             const struct dom_sid *sid,
  34                             struct netr_SamInfo3 **info3,
  35                             const uint8 *cached_nt_pass[NT_HASH_LEN],
  36                             const uint8 *cred_salt[NT_HASH_LEN])
  37 {
  38         struct netr_SamInfo3 *info;
  39         NTSTATUS status;
  40
  41         status = wcache_get_creds(domain, mem_ctx, sid, cached_nt_pass, cred_salt);
  42         if (!NT_STATUS_IS_OK(status)) {
  43                 return status;
  44         }
  45
  46         info = netsamlogon_cache_get(mem_ctx, sid);
  47         if (info == NULL) {
  48                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  49         }
  50
  51         *info3 = info;
  52
  53         return NT_STATUS_OK;
  54 }
  55
  56
  57 NTSTATUS winbindd_store_creds(struct winbindd_domain *domain,
  58                               const char *user,
  59                               const char *pass,
  60                               struct netr_SamInfo3 *info3)
  61 {
  62         NTSTATUS status;
  63         uchar nt_pass[NT_HASH_LEN];
  64         struct dom_sid cred_sid;
  65
  66         if (info3 != NULL) {
  67
  68                 sid_compose(&cred_sid, info3->base.domain_sid,
  69                             info3->base.rid);
  70                 info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
  71
  72         } else if (user != NULL) {
  73
  74                 /* do lookup ourself */
  75
  76                 enum lsa_SidType type;
  77
  78                 if (!lookup_cached_name(domain->name,
  79                                         user,
  80                                         &cred_sid,
  81                                         &type)) {
  82                         return NT_STATUS_NO_SUCH_USER;
  83                 }
  84         } else {
  85                 return NT_STATUS_INVALID_PARAMETER;
  86         }
  87
  88         if (pass) {
  89
  90                 int count = 0;
  91
  92                 status = wcache_count_cached_creds(domain, &count);
  93                 if (!NT_STATUS_IS_OK(status)) {
  94                         return status;
  95                 }
  96
  97                 DEBUG(11,("we have %d cached creds\n", count));
  98
  99                 if (count + 1 > MAX_CACHED_LOGINS) {
 100
 101                         DEBUG(10,("need to delete the oldest cached login\n"));
 102
 103                         status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
 104                         if (!NT_STATUS_IS_OK(status)) {
 105                                 DEBUG(10,("failed to remove oldest cached cred: %s\n",
 106                                         nt_errstr(status)));
 107                                 return status;
 108                         }
 109                 }
 110
 111                 E_md4hash(pass, nt_pass);
 112
 113                 dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
 114
 115                 status = wcache_save_creds(domain, &cred_sid, nt_pass);
 116                 if (!NT_STATUS_IS_OK(status)) {
 117                         return status;
 118                 }
 119         }
 120
 121         if (info3 != NULL && user != NULL) {
 122                 if (!netsamlogon_cache_store(user, info3)) {
 123                         return NT_STATUS_ACCESS_DENIED;
 124                 }
 125         }
 126
 127         return NT_STATUS_OK;
 128 }
 129
 130 NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
 131                                         const char *user,
 132                                         const char *pass,
 133                                         struct netr_SamInfo3 *info3)
 134 {
 135         return winbindd_store_creds(domain, user, pass, info3);
 136 }
 137
 138 NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
 139                                        const char *user,
 140                                        const char *pass)
 141 {
 142         return winbindd_store_creds(domain, user, pass, NULL);
 143 }
 144
 145