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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23
  24 #include "includes.h"
  25 #include "libnet/libnet.h"
  26 #include "system/kerberos.h"
  27 #include "auth/credentials/credentials.h"
  28
  29 static NTSTATUS samdump_keytab_handle_user(TALLOC_CTX *mem_ctx,
  30                                             const char *keytab_name,
  31                                             struct netr_DELTA_ENUM *delta)
  32 {
  33         struct netr_DELTA_USER *user = delta->delta_union.user;
  34         const char *username = user->account_name.string;
  35         struct cli_credentials *credentials;
  36         int ret;
  37
  38         if (!user->nt_password_present) {
  39                 /* We can't do anything here */
  40                 return NT_STATUS_OK;
  41         }
  42
  43         credentials = cli_credentials_init(mem_ctx);
  44         if (!credentials) {
  45                 return NT_STATUS_NO_MEMORY;
  46         }
  47         cli_credentials_set_conf(credentials);
  48         cli_credentials_set_username(credentials, username, CRED_SPECIFIED);
  49
  50         /* We really should consult ldap in the main SamSync code, and
  51          * pass a value in here */
  52         cli_credentials_set_kvno(credentials, 0);
  53         cli_credentials_set_nt_hash(credentials, &user->ntpassword, CRED_SPECIFIED);
  54         ret = cli_credentials_set_keytab_name(credentials, keytab_name, CRED_SPECIFIED);
  55         if (ret) {
  56                 return NT_STATUS_UNSUCCESSFUL;
  57         }
  58
  59         ret = cli_credentials_update_keytab(credentials);
  60         if (ret) {
  61                 return NT_STATUS_UNSUCCESSFUL;
  62         }
  63
  64         return NT_STATUS_OK;
  65 }
  66
  67 static NTSTATUS libnet_samdump_keytab_fn(TALLOC_CTX *mem_ctx,
  68                                          void *private,
  69                                          enum netr_SamDatabaseID database,
  70                                          struct netr_DELTA_ENUM *delta,
  71                                          char **error_string)
  72 {
  73         NTSTATUS nt_status = NT_STATUS_OK;
  74         const char *keytab_name = private;
  75
  76         *error_string = NULL;
  77         switch (delta->delta_type) {
  78         case NETR_DELTA_USER:
  79         {
  80                 /* not interested in builtin users */
  81                 if (database == SAM_DATABASE_DOMAIN) {
  82                         nt_status = samdump_keytab_handle_user(mem_ctx,
  83                                                                keytab_name,
  84                                                                delta);
  85                         break;
  86                 }
  87         }
  88         default:
  89                 /* Can't dump them all right now */
  90                 break;
  91         }
  92         return nt_status;
  93 }
  94
  95 NTSTATUS libnet_SamDump_keytab(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
  96 {
  97         NTSTATUS nt_status;
  98         struct libnet_SamSync r2;
  99
 100         r2.out.error_string            = NULL;
 101         r2.in.binding_string           = r->in.binding_string;
 102         r2.in.init_fn                  = NULL;
 103         r2.in.delta_fn                 = libnet_samdump_keytab_fn;
 104         r2.in.fn_ctx                   = discard_const(r->in.keytab_name);
 105         r2.in.machine_account          = r->in.machine_account;
 106         nt_status                      = libnet_SamSync_netlogon(ctx, mem_ctx, &r2);
 107         r->out.error_string            = r2.out.error_string;
 108         talloc_steal(mem_ctx, r->out.error_string);
 109
 110         if (!NT_STATUS_IS_OK(nt_status)) {
 111                 return nt_status;
 112         }
 113
 114         return nt_status;
 115 }