LCOV - code coverage report
Current view: top level - source4/param - secrets.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 14 54 25.9 %
Date: 2021-09-23 10:06:22 Functions: 3 4 75.0 %

          Line data    Source code
       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             :    Copyright (C) Andrew Tridgell 1992-2001
       4             :    Copyright (C) Andrew Bartlett      2002
       5             :    Copyright (C) Rafal Szczesniak     2002
       6             :    
       7             :    This program is free software; you can redistribute it and/or modify
       8             :    it under the terms of the GNU General Public License as published by
       9             :    the Free Software Foundation; either version 3 of the License, or
      10             :    (at your option) any later version.
      11             :    
      12             :    This program is distributed in the hope that it will be useful,
      13             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :    GNU General Public License for more details.
      16             :    
      17             :    You should have received a copy of the GNU General Public License
      18             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      19             : */
      20             : 
      21             : /* the Samba secrets database stores any generated, private information
      22             :    such as the local SID and machine trust password */
      23             : 
      24             : #include "includes.h"
      25             : #include "secrets.h"
      26             : #include "param/param.h"
      27             : #include "system/filesys.h"
      28             : #include "lib/tdb_wrap/tdb_wrap.h"
      29             : #include "lib/ldb-samba/ldb_wrap.h"
      30             : #include <ldb.h>
      31             : #include "../lib/util/util_tdb.h"
      32             : #include "librpc/gen_ndr/ndr_security.h"
      33             : #include "dsdb/samdb/samdb.h"
      34             : 
      35             : /**
      36             :   create or connect to the secrets ldb
      37             : */
      38          11 : struct ldb_context *secrets_db_create(TALLOC_CTX *mem_ctx,
      39             :                                       struct loadparm_context *lp_ctx)
      40             : {
      41          11 :         return ldb_wrap_connect(mem_ctx, NULL, lp_ctx, "secrets.ldb",
      42             :                                NULL, NULL, 0);
      43             : }
      44             : 
      45             : /**
      46             :   connect to the secrets ldb
      47             : */
      48       55761 : struct ldb_context *secrets_db_connect(TALLOC_CTX *mem_ctx,
      49             :                                         struct loadparm_context *lp_ctx)
      50             : {
      51       55761 :         return ldb_wrap_connect(mem_ctx, NULL, lp_ctx, "secrets.ldb",
      52             :                                NULL, NULL, LDB_FLG_DONT_CREATE_DB);
      53             : }
      54             : 
      55             : /**
      56             :  * Retrieve the domain SID from the secrets database.
      57             :  * @return pointer to a SID object if the SID could be obtained, NULL otherwise
      58             :  */
      59           0 : struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx,
      60             :                                        struct loadparm_context *lp_ctx,
      61             :                                        const char *domain,
      62             :                                        enum netr_SchannelType *sec_channel_type,
      63             :                                        char **errstring)
      64             : {
      65             :         struct ldb_context *ldb;
      66             :         struct ldb_message *msg;
      67             :         int ldb_ret;
      68           0 :         const char *attrs[] = { "objectSid", "secureChannelType", NULL };
      69           0 :         struct dom_sid *result = NULL;
      70             :         const struct ldb_val *v;
      71             :         enum ndr_err_code ndr_err;
      72             : 
      73           0 :         *errstring = NULL;
      74             : 
      75           0 :         ldb = secrets_db_connect(mem_ctx, lp_ctx);
      76           0 :         if (ldb == NULL) {
      77           0 :                 DEBUG(5, ("secrets_db_connect failed\n"));
      78           0 :                 return NULL;
      79             :         }
      80             : 
      81           0 :         ldb_ret = dsdb_search_one(ldb, ldb, &msg,
      82             :                               ldb_dn_new(mem_ctx, ldb, SECRETS_PRIMARY_DOMAIN_DN),
      83             :                               LDB_SCOPE_ONELEVEL,
      84             :                               attrs, 0, SECRETS_PRIMARY_DOMAIN_FILTER, domain);
      85             : 
      86           0 :         if (ldb_ret != LDB_SUCCESS) {
      87           0 :                 *errstring = talloc_asprintf(mem_ctx, "Failed to find record for %s in %s: %s: %s", 
      88           0 :                                              domain, (char *) ldb_get_opaque(ldb, "ldb_url"),
      89             :                                              ldb_strerror(ldb_ret), ldb_errstring(ldb));
      90           0 :                 return NULL;
      91             :         }
      92           0 :         v = ldb_msg_find_ldb_val(msg, "objectSid");
      93           0 :         if (v == NULL) {
      94           0 :                 *errstring = talloc_asprintf(mem_ctx, "Failed to find a SID on record for %s in %s", 
      95           0 :                                              domain, (char *) ldb_get_opaque(ldb, "ldb_url"));
      96           0 :                 return NULL;
      97             :         }
      98             : 
      99           0 :         if (sec_channel_type) {
     100             :                 int t;
     101           0 :                 t = ldb_msg_find_attr_as_int(msg, "secureChannelType", -1);
     102           0 :                 if (t == -1) {
     103           0 :                         *errstring = talloc_asprintf(mem_ctx, "Failed to find secureChannelType for %s in %s",
     104           0 :                                                      domain, (char *) ldb_get_opaque(ldb, "ldb_url"));
     105           0 :                         return NULL;
     106             :                 }
     107           0 :                 *sec_channel_type = t;
     108             :         }
     109             : 
     110           0 :         result = talloc(mem_ctx, struct dom_sid);
     111           0 :         if (result == NULL) {
     112           0 :                 talloc_free(ldb);
     113           0 :                 return NULL;
     114             :         }
     115             : 
     116           0 :         ndr_err = ndr_pull_struct_blob(v, result, result,
     117             :                                        (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
     118           0 :         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
     119           0 :                 *errstring = talloc_asprintf(mem_ctx, "Failed to parse SID on record for %s in %s", 
     120           0 :                                              domain, (char *) ldb_get_opaque(ldb, "ldb_url"));
     121           0 :                 talloc_free(result);
     122           0 :                 talloc_free(ldb);
     123           0 :                 return NULL;
     124             :         }
     125             : 
     126           0 :         return result;
     127             : }
     128             : 
     129       53575 : char *keytab_name_from_msg(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct ldb_message *msg) 
     130             : {
     131       53575 :         const char *krb5keytab = ldb_msg_find_attr_as_string(msg, "krb5Keytab", NULL);
     132       53575 :         if (krb5keytab) {
     133           0 :                 return talloc_strdup(mem_ctx, krb5keytab);
     134             :         } else {
     135             :                 char *file_keytab;
     136             :                 char *relative_path;
     137       53575 :                 const char *privateKeytab = ldb_msg_find_attr_as_string(msg, "privateKeytab", NULL);
     138       53575 :                 if (!privateKeytab) {
     139           0 :                         return NULL;
     140             :                 }
     141             : 
     142       53575 :                 relative_path = ldb_relative_path(ldb, mem_ctx, privateKeytab);
     143       53575 :                 if (!relative_path) {
     144           0 :                         return NULL;
     145             :                 }
     146       53575 :                 file_keytab = talloc_asprintf(mem_ctx, "FILE:%s", relative_path);
     147       53575 :                 talloc_free(relative_path);
     148       53575 :                 return file_keytab;
     149             :         }
     150             :         return NULL;
     151             : }
     152             : 

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