source3/winbindd/winbindd_creds.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - cached credentials functions
   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 #include "libsmb/samlogon_cache.h"
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 #define MAX_CACHED_LOGINS 10
  31
  32 NTSTATUS winbindd_get_creds(struct winbindd_domain *domain,
  33                             TALLOC_CTX *mem_ctx,
  34                             const struct dom_sid *sid,
  35                             struct netr_SamInfo3 **info3,
  36                             const uint8_t **cached_nt_pass,
  37                             const uint8_t **cred_salt)
  38 {
  39         struct netr_SamInfo3 *info;
  40         NTSTATUS status;
  41
  42         status = wcache_get_creds(domain, mem_ctx, sid, cached_nt_pass, cred_salt);
  43         if (!NT_STATUS_IS_OK(status)) {
  44                 return status;
  45         }
  46
  47         info = netsamlogon_cache_get(mem_ctx, sid);
  48         if (info == NULL) {
  49                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  50         }
  51
  52         *info3 = info;
  53
  54         return NT_STATUS_OK;
  55 }
  56
  57
  58 NTSTATUS winbindd_store_creds(struct winbindd_domain *domain,
  59                               const char *user,
  60                               const char *pass,
  61                               struct netr_SamInfo3 *info3)
  62 {
  63         NTSTATUS status;
  64         uchar nt_pass[NT_HASH_LEN];
  65         struct dom_sid cred_sid;
  66
  67         if (info3 != NULL) {
  68
  69                 sid_compose(&cred_sid, info3->base.domain_sid,
  70                             info3->base.rid);
  71                 info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
  72
  73         } else if (user != NULL) {
  74
  75                 /* do lookup ourself */
  76
  77                 enum lsa_SidType type;
  78
  79                 if (!lookup_cached_name(domain->name, /* namespace */
  80                                         domain->name,
  81                                         user,
  82                                         &cred_sid,
  83                                         &type)) {
  84                         return NT_STATUS_NO_SUCH_USER;
  85                 }
  86         } else {
  87                 return NT_STATUS_INVALID_PARAMETER;
  88         }
  89
  90         if (pass) {
  91
  92                 int count = 0;
  93
  94                 status = wcache_count_cached_creds(domain, &count);
  95                 if (!NT_STATUS_IS_OK(status)) {
  96                         return status;
  97                 }
  98
  99                 DEBUG(11,("we have %d cached creds\n", count));
 100
 101                 if (count + 1 > MAX_CACHED_LOGINS) {
 102
 103                         DEBUG(10,("need to delete the oldest cached login\n"));
 104
 105                         status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
 106                         if (!NT_STATUS_IS_OK(status)) {
 107                                 DEBUG(10,("failed to remove oldest cached cred: %s\n",
 108                                         nt_errstr(status)));
 109                                 return status;
 110                         }
 111                 }
 112
 113                 E_md4hash(pass, nt_pass);
 114
 115                 dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
 116
 117                 status = wcache_save_creds(domain, &cred_sid, nt_pass);
 118                 if (!NT_STATUS_IS_OK(status)) {
 119                         return status;
 120                 }
 121         }
 122
 123         if (info3 != NULL && user != NULL) {
 124                 if (!netsamlogon_cache_store(user, info3)) {
 125                         return NT_STATUS_ACCESS_DENIED;
 126                 }
 127         }
 128
 129         return NT_STATUS_OK;
 130 }
 131
 132 NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
 133                                         const char *user,
 134                                         const char *pass,
 135                                         struct netr_SamInfo3 *info3)
 136 {
 137         return winbindd_store_creds(domain, user, pass, info3);
 138 }
 139
 140 NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
 141                                        const char *user,
 142                                        const char *pass)
 143 {
 144         return winbindd_store_creds(domain, user, pass, NULL);
 145 }
 146
 147