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 #include "lib/events/events.h"
  30
  31 static NTSTATUS samdump_keytab_handle_user(TALLOC_CTX *mem_ctx,
  32                                            struct tevent_context *event_ctx,
  33                                            struct loadparm_context *lp_ctx,
  34                                             const char *keytab_name,
  35                                             struct netr_DELTA_ENUM *delta)
  36 {
  37         struct netr_DELTA_USER *user = delta->delta_union.user;
  38         const char *username = user->account_name.string;
  39         struct cli_credentials *credentials;
  40         int ret;
  41
  42         if (!user->nt_password_present) {
  43                 /* We can't do anything here */
  44                 return NT_STATUS_OK;
  45         }
  46
  47         credentials = cli_credentials_init(mem_ctx);
  48         if (!credentials) {
  49                 return NT_STATUS_NO_MEMORY;
  50         }
  51         cli_credentials_set_conf(credentials, lp_ctx);
  52         cli_credentials_set_username(credentials, username, CRED_SPECIFIED);
  53
  54         /* We really should consult ldap in the main SamSync code, and
  55          * pass a value in here */
  56         cli_credentials_set_kvno(credentials, 0);
  57         cli_credentials_set_nt_hash(credentials, &user->ntpassword, CRED_SPECIFIED);
  58         ret = cli_credentials_set_keytab_name(credentials, event_ctx, lp_ctx, keytab_name, CRED_SPECIFIED);
  59         if (ret) {
  60                 return NT_STATUS_UNSUCCESSFUL;
  61         }
  62
  63         ret = cli_credentials_update_keytab(credentials, event_ctx, lp_ctx);
  64         if (ret) {
  65                 return NT_STATUS_UNSUCCESSFUL;
  66         }
  67
  68         return NT_STATUS_OK;
  69 }
  70
  71 struct libnet_samdump_keytab_data {
  72         const char *keytab_name;
  73         struct tevent_context *ev_ctx;
  74         struct loadparm_context *lp_ctx;
  75 };
  76
  77 static NTSTATUS libnet_samdump_keytab_fn(TALLOC_CTX *mem_ctx,
  78                                          void *private,
  79                                          enum netr_SamDatabaseID database,
  80                                          struct netr_DELTA_ENUM *delta,
  81                                          char **error_string)
  82 {
  83         NTSTATUS nt_status = NT_STATUS_OK;
  84         struct libnet_samdump_keytab_data *data = private;
  85         *error_string = NULL;
  86         switch (delta->delta_type) {
  87         case NETR_DELTA_USER:
  88         {
  89                 /* not interested in builtin users */
  90                 if (database == SAM_DATABASE_DOMAIN) {
  91                         nt_status = samdump_keytab_handle_user(mem_ctx,
  92                                                                data->ev_ctx,
  93                                                                data->lp_ctx,
  94                                                                data->keytab_name,
  95                                                                delta);
  96                         break;
  97                 }
  98         }
  99         default:
 100                 /* Can't dump them all right now */
 101                 break;
 102         }
 103         return nt_status;
 104 }
 105
 106 NTSTATUS libnet_SamDump_keytab(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
 107 {
 108         NTSTATUS nt_status;
 109         struct libnet_samdump_keytab_data data;
 110         struct libnet_SamSync r2;
 111
 112         data.keytab_name = r->in.keytab_name;
 113         data.ev_ctx = ctx->event_ctx;
 114         data.lp_ctx = ctx->lp_ctx;
 115
 116         r2.out.error_string            = NULL;
 117         r2.in.binding_string           = r->in.binding_string;
 118         r2.in.rid_crypt                = true;
 119         r2.in.init_fn                  = NULL;
 120         r2.in.delta_fn                 = libnet_samdump_keytab_fn;
 121         r2.in.fn_ctx                   = &data;
 122         r2.in.machine_account          = r->in.machine_account;
 123         nt_status                      = libnet_SamSync_netlogon(ctx, mem_ctx, &r2);
 124         r->out.error_string            = r2.out.error_string;
 125         talloc_steal(mem_ctx, r->out.error_string);
 126
 127         if (!NT_STATUS_IS_OK(nt_status)) {
 128                 return nt_status;
 129         }
 130
 131         return nt_status;
 132 }