source4/libnet/libnet_samdump_keytab.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Extract kerberos keys from a remote SamSync server
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   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
  23 #include "includes.h"
  24 #include "libnet/libnet.h"
  25 #include "system/kerberos.h"
  26 #include "auth/credentials/credentials.h"
  27 #include "auth/credentials/credentials_krb5.h"
  28 #include "param/param.h"
  29
  30 static NTSTATUS samdump_keytab_handle_user(TALLOC_CTX *mem_ctx,
  31                                            struct loadparm_context *lp_ctx,
  32                                             const char *keytab_name,
  33                                             struct netr_DELTA_ENUM *delta)
  34 {
  35         struct netr_DELTA_USER *user = delta->delta_union.user;
  36         const char *username = user->account_name.string;
  37         struct cli_credentials *credentials;
  38         int ret;
  39
  40         if (!user->nt_password_present) {
  41                 /* We can't do anything here */
  42                 return NT_STATUS_OK;
  43         }
  44
  45         credentials = cli_credentials_init(mem_ctx);
  46         if (!credentials) {
  47                 return NT_STATUS_NO_MEMORY;
  48         }
  49         cli_credentials_set_conf(credentials, lp_ctx);
  50         cli_credentials_set_username(credentials, username, CRED_SPECIFIED);
  51
  52         /* We really should consult ldap in the main SamSync code, and
  53          * pass a value in here */
  54         cli_credentials_set_kvno(credentials, 0);
  55         cli_credentials_set_nt_hash(credentials, &user->ntpassword, CRED_SPECIFIED);
  56         ret = cli_credentials_set_keytab_name(credentials, lp_ctx, keytab_name, CRED_SPECIFIED);
  57         if (ret) {
  58                 return NT_STATUS_UNSUCCESSFUL;
  59         }
  60
  61         ret = cli_credentials_update_keytab(credentials, lp_ctx);
  62         if (ret) {
  63                 return NT_STATUS_UNSUCCESSFUL;
  64         }
  65
  66         return NT_STATUS_OK;
  67 }
  68
  69 static NTSTATUS libnet_samdump_keytab_fn(TALLOC_CTX *mem_ctx,
  70                                          void *private,
  71                                          enum netr_SamDatabaseID database,
  72                                          struct netr_DELTA_ENUM *delta,
  73                                          char **error_string)
  74 {
  75         NTSTATUS nt_status = NT_STATUS_OK;
  76         const char *keytab_name = private;
  77
  78         *error_string = NULL;
  79         switch (delta->delta_type) {
  80         case NETR_DELTA_USER:
  81         {
  82                 /* not interested in builtin users */
  83                 if (database == SAM_DATABASE_DOMAIN) {
  84                         nt_status = samdump_keytab_handle_user(mem_ctx,
  85                                                                global_loadparm,
  86                                                                keytab_name,
  87                                                                delta);
  88                         break;
  89                 }
  90         }
  91         default:
  92                 /* Can't dump them all right now */
  93                 break;
  94         }
  95         return nt_status;
  96 }
  97
  98 NTSTATUS libnet_SamDump_keytab(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
  99 {
 100         NTSTATUS nt_status;
 101         struct libnet_SamSync r2;
 102
 103         r2.out.error_string            = NULL;
 104         r2.in.binding_string           = r->in.binding_string;
 105         r2.in.rid_crypt                = true;
 106         r2.in.init_fn                  = NULL;
 107         r2.in.delta_fn                 = libnet_samdump_keytab_fn;
 108         r2.in.fn_ctx                   = discard_const(r->in.keytab_name);
 109         r2.in.machine_account          = r->in.machine_account;
 110         nt_status                      = libnet_SamSync_netlogon(ctx, mem_ctx, &r2);
 111         r->out.error_string            = r2.out.error_string;
 112         talloc_steal(mem_ctx, r->out.error_string);
 113
 114         if (!NT_STATUS_IS_OK(nt_status)) {
 115                 return nt_status;
 116         }
 117
 118         return nt_status;
 119 }