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 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                               TALLOC_CTX *mem_ctx,
  58                               const char *user,
  59                               const char *pass,
  60                               struct netr_SamInfo3 *info3,
  61                               const DOM_SID *user_sid)
  62 {
  63         NTSTATUS status;
  64         uchar nt_pass[NT_HASH_LEN];
  65         DOM_SID cred_sid;
  66
  67         if (info3 != NULL) {
  68
  69                 DOM_SID sid;
  70                 sid_copy(&sid, info3->base.domain_sid);
  71                 sid_append_rid(&sid, info3->base.rid);
  72                 sid_copy(&cred_sid, &sid);
  73                 info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
  74
  75         } else if (user_sid != NULL) {
  76
  77                 sid_copy(&cred_sid, user_sid);
  78
  79         } else if (user != NULL) {
  80
  81                 /* do lookup ourself */
  82
  83                 enum lsa_SidType type;
  84
  85                 if (!lookup_cached_name(mem_ctx,
  86                                         domain->name,
  87                                         user,
  88                                         &cred_sid,
  89                                         &type)) {
  90                         return NT_STATUS_NO_SUCH_USER;
  91                 }
  92         } else {
  93                 return NT_STATUS_INVALID_PARAMETER;
  94         }
  95
  96         if (pass) {
  97
  98                 int count = 0;
  99
 100                 status = wcache_count_cached_creds(domain, &count);
 101                 if (!NT_STATUS_IS_OK(status)) {
 102                         return status;
 103                 }
 104
 105                 DEBUG(11,("we have %d cached creds\n", count));
 106
 107                 if (count + 1 > MAX_CACHED_LOGINS) {
 108
 109                         DEBUG(10,("need to delete the oldest cached login\n"));
 110
 111                         status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
 112                         if (!NT_STATUS_IS_OK(status)) {
 113                                 DEBUG(10,("failed to remove oldest cached cred: %s\n",
 114                                         nt_errstr(status)));
 115                                 return status;
 116                         }
 117                 }
 118
 119                 E_md4hash(pass, nt_pass);
 120
 121                 dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
 122
 123                 status = wcache_save_creds(domain, mem_ctx, &cred_sid, nt_pass);
 124                 if (!NT_STATUS_IS_OK(status)) {
 125                         return status;
 126                 }
 127         }
 128
 129         if (info3 != NULL && user != NULL) {
 130                 if (!netsamlogon_cache_store(user, info3)) {
 131                         return NT_STATUS_ACCESS_DENIED;
 132                 }
 133         }
 134
 135         return NT_STATUS_OK;
 136 }
 137
 138 NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
 139                                         TALLOC_CTX *mem_ctx,
 140                                         const char *user,
 141                                         const char *pass,
 142                                         struct netr_SamInfo3 *info3)
 143 {
 144         return winbindd_store_creds(domain, mem_ctx, user, pass, info3, NULL);
 145 }
 146
 147 NTSTATUS winbindd_update_creds_by_sid(struct winbindd_domain *domain,
 148                                       TALLOC_CTX *mem_ctx,
 149                                       const DOM_SID *sid,
 150                                       const char *pass)
 151 {
 152         return winbindd_store_creds(domain, mem_ctx, NULL, pass, NULL, sid);
 153 }
 154
 155 NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
 156                                        TALLOC_CTX *mem_ctx,
 157                                        const char *user,
 158                                        const char *pass)
 159 {
 160         return winbindd_store_creds(domain, mem_ctx, user, pass, NULL, NULL);
 161 }
 162
 163