source3/passdb/secrets_lsa.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Copyright (C) Guenther Deschner    2009
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include "includes.h"
  20 #include "librpc/gen_ndr/ndr_secrets.h"
  21 #include "secrets.h"
  22
  23 /******************************************************************************
  24 *******************************************************************************/
  25
  26 static char *lsa_secret_key(TALLOC_CTX *mem_ctx,
  27                             const char *secret_name)
  28 {
  29         return talloc_asprintf_strupper_m(mem_ctx, "SECRETS/LSA/%s",
  30                                           secret_name);
  31 }
  32
  33 /******************************************************************************
  34 *******************************************************************************/
  35
  36 static NTSTATUS lsa_secret_get_common(TALLOC_CTX *mem_ctx,
  37                                       const char *secret_name,
  38                                       struct lsa_secret *secret)
  39 {
  40         char *key;
  41         DATA_BLOB blob;
  42         enum ndr_err_code ndr_err;
  43
  44         ZERO_STRUCTP(secret);
  45
  46         key = lsa_secret_key(mem_ctx, secret_name);
  47         if (!key) {
  48                 return NT_STATUS_NO_MEMORY;
  49         }
  50
  51         blob.data = (uint8_t *)secrets_fetch(key, &blob.length);
  52         talloc_free(key);
  53
  54         if (!blob.data) {
  55                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  56         }
  57
  58         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, secret,
  59                                 (ndr_pull_flags_fn_t)ndr_pull_lsa_secret);
  60         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  61                 SAFE_FREE(blob.data);
  62                 return ndr_map_error2ntstatus(ndr_err);
  63         }
  64
  65         SAFE_FREE(blob.data);
  66
  67         return NT_STATUS_OK;
  68 }
  69
  70 /******************************************************************************
  71 *******************************************************************************/
  72
  73 NTSTATUS lsa_secret_get(TALLOC_CTX *mem_ctx,
  74                         const char *secret_name,
  75                         DATA_BLOB *secret_current,
  76                         NTTIME *secret_current_lastchange,
  77                         DATA_BLOB *secret_old,
  78                         NTTIME *secret_old_lastchange,
  79                         struct security_descriptor **sd)
  80 {
  81         NTSTATUS status;
  82         struct lsa_secret secret;
  83
  84         status = lsa_secret_get_common(mem_ctx, secret_name, &secret);
  85         if (!NT_STATUS_IS_OK(status)) {
  86                 return status;
  87         }
  88
  89         if (secret_current) {
  90                 *secret_current = data_blob_null;
  91                 if (secret.secret_current) {
  92                         *secret_current = *secret.secret_current;
  93                 }
  94         }
  95         if (secret_current_lastchange) {
  96                 *secret_current_lastchange = secret.secret_current_lastchange;
  97         }
  98         if (secret_old) {
  99                 *secret_old = data_blob_null;
 100                 if (secret.secret_old) {
 101                         *secret_old = *secret.secret_old;
 102                 }
 103         }
 104         if (secret_old_lastchange) {
 105                 *secret_old_lastchange = secret.secret_old_lastchange;
 106         }
 107         if (sd) {
 108                 *sd = secret.sd;
 109         }
 110
 111         return NT_STATUS_OK;
 112 }
 113
 114 /******************************************************************************
 115 *******************************************************************************/
 116
 117 static NTSTATUS lsa_secret_set_common(TALLOC_CTX *mem_ctx,
 118                                       const char *key,
 119                                       struct lsa_secret *secret,
 120                                       DATA_BLOB *secret_current,
 121                                       DATA_BLOB *secret_old,
 122                                       struct security_descriptor *sd)
 123 {
 124         enum ndr_err_code ndr_err;
 125         DATA_BLOB blob;
 126         struct timeval now = timeval_current();
 127
 128         if (!secret) {
 129                 secret = talloc_zero(mem_ctx, struct lsa_secret);
 130         }
 131
 132         if (!secret) {
 133                 return NT_STATUS_NO_MEMORY;
 134         }
 135
 136         if (secret_old) {
 137                 secret->secret_old = secret_old;
 138                 secret->secret_old_lastchange = timeval_to_nttime(&now);
 139         } else {
 140                 if (secret->secret_current) {
 141                         secret->secret_old = secret->secret_current;
 142                         secret->secret_old_lastchange = secret->secret_current_lastchange;
 143                 } else {
 144                         secret->secret_old = NULL;
 145                         secret->secret_old_lastchange = timeval_to_nttime(&now);
 146                 }
 147         }
 148         if (secret_current) {
 149                 secret->secret_current = secret_current;
 150                 secret->secret_current_lastchange = timeval_to_nttime(&now);
 151         } else {
 152                 secret->secret_current = NULL;
 153                 secret->secret_current_lastchange = timeval_to_nttime(&now);
 154         }
 155         if (sd) {
 156                 secret->sd = sd;
 157         }
 158
 159         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, secret,
 160                                 (ndr_push_flags_fn_t)ndr_push_lsa_secret);
 161         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 162                 return ndr_map_error2ntstatus(ndr_err);
 163         }
 164
 165         if (!secrets_store(key, blob.data, blob.length)) {
 166                 return NT_STATUS_ACCESS_DENIED;
 167         }
 168
 169         return NT_STATUS_OK;
 170 }
 171
 172 /******************************************************************************
 173 *******************************************************************************/
 174
 175 NTSTATUS lsa_secret_set(const char *secret_name,
 176                         DATA_BLOB *secret_current,
 177                         DATA_BLOB *secret_old,
 178                         struct security_descriptor *sd)
 179 {
 180         char *key;
 181         struct lsa_secret secret;
 182         NTSTATUS status;
 183
 184         key = lsa_secret_key(talloc_tos(), secret_name);
 185         if (!key) {
 186                 return NT_STATUS_NO_MEMORY;
 187         }
 188
 189         status = lsa_secret_get_common(talloc_tos(), secret_name, &secret);
 190         if (!NT_STATUS_IS_OK(status) &&
 191             !NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 192                 talloc_free(key);
 193                 return status;
 194         }
 195
 196         status = lsa_secret_set_common(talloc_tos(), key,
 197                                        &secret,
 198                                        secret_current,
 199                                        secret_old,
 200                                        sd);
 201         talloc_free(key);
 202
 203         return status;
 204 }
 205
 206 /******************************************************************************
 207 *******************************************************************************/
 208
 209 NTSTATUS lsa_secret_delete(const char *secret_name)
 210 {
 211         char *key;
 212         struct lsa_secret secret;
 213         NTSTATUS status;
 214
 215         key = lsa_secret_key(talloc_tos(), secret_name);
 216         if (!key) {
 217                 return NT_STATUS_NO_MEMORY;
 218         }
 219
 220         status = lsa_secret_get_common(talloc_tos(), secret_name, &secret);
 221         if (!NT_STATUS_IS_OK(status)) {
 222                 talloc_free(key);
 223                 return status;
 224         }
 225
 226         if (!secrets_delete_entry(key)) {
 227                 talloc_free(key);
 228                 return NT_STATUS_ACCESS_DENIED;
 229         }
 230
 231         talloc_free(key);
 232
 233         return NT_STATUS_OK;
 234 }