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