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 "librpc/gen_ndr/ndr_netlogon.h"
  27 #include "librpc/gen_ndr/ndr_samr.h"
  28 #include "system/kerberos.h"
  29 #include "auth/kerberos/kerberos.h"
  30
  31 static NTSTATUS samdump_keytab_handle_user(TALLOC_CTX *mem_ctx,
  32                                             const char *keytab_name,
  33                                             struct creds_CredentialState *creds,
  34                                             struct netr_DELTA_ENUM *delta)
  35 {
  36         struct netr_DELTA_USER *user = delta->delta_union.user;
  37         const char *username = user->account_name.string;
  38         struct cli_credentials *credentials;
  39         int ret;
  40
  41         if (!user->nt_password_present) {
  42                 /* We can't do anything here */
  43                 return NT_STATUS_OK;
  44         }
  45
  46         credentials = cli_credentials_init(mem_ctx);
  47         if (!credentials) {
  48                 return NT_STATUS_NO_MEMORY;
  49         }
  50         cli_credentials_set_conf(credentials);
  51         cli_credentials_set_username(credentials, username, CRED_SPECIFIED);
  52
  53         /* We really should consult ldap in the main SamSync code, and
  54          * pass a value in here */
  55         cli_credentials_set_kvno(credentials, 0);
  56         cli_credentials_set_nt_hash(credentials, &user->ntpassword, CRED_SPECIFIED);
  57         ret = cli_credentials_set_keytab_name(credentials, keytab_name, CRED_SPECIFIED);
  58         if (ret) {
  59                 return NT_STATUS_UNSUCCESSFUL;
  60         }
  61
  62         ret = cli_credentials_update_keytab(credentials);
  63         if (ret) {
  64                 return NT_STATUS_UNSUCCESSFUL;
  65         }
  66
  67         return NT_STATUS_OK;
  68 }
  69
  70 static NTSTATUS libnet_samdump_keytab_fn(TALLOC_CTX *mem_ctx,
  71                                          void *private,
  72                                          struct creds_CredentialState *creds,
  73                                          enum netr_SamDatabaseID database,
  74                                          struct netr_DELTA_ENUM *delta,
  75                                          char **error_string)
  76 {
  77         NTSTATUS nt_status = NT_STATUS_OK;
  78         const char *keytab_name = private;
  79
  80         *error_string = NULL;
  81         switch (delta->delta_type) {
  82         case NETR_DELTA_USER:
  83         {
  84                 /* not interested in builtin users */
  85                 if (database == SAM_DATABASE_DOMAIN) {
  86                         nt_status = samdump_keytab_handle_user(mem_ctx,
  87                                                                keytab_name,
  88                                                                creds,
  89                                                                delta);
  90                         break;
  91                 }
  92         }
  93         default:
  94                 /* Can't dump them all right now */
  95                 break;
  96         }
  97         return nt_status;
  98 }
  99
 100 static NTSTATUS libnet_SamDump_keytab_netlogon(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
 101 {
 102         NTSTATUS nt_status;
 103         struct libnet_SamSync r2;
 104
 105         r2.error_string = NULL;
 106         r2.delta_fn = libnet_samdump_keytab_fn;
 107         r2.fn_ctx = r->keytab_name;
 108         r2.machine_account = NULL; /* TODO:  Create a machine account, fill this in, and the delete it */
 109         nt_status = libnet_SamSync_netlogon(ctx, mem_ctx, &r2);
 110         r->error_string = r2.error_string;
 111
 112         if (!NT_STATUS_IS_OK(nt_status)) {
 113                 return nt_status;
 114         }
 115
 116         return nt_status;
 117 }
 118
 119
 120
 121 static NTSTATUS libnet_SamDump_keytab_generic(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
 122 {
 123         NTSTATUS nt_status;
 124         struct libnet_SamDump_keytab r2;
 125         r2.level = LIBNET_SAMDUMP_NETLOGON;
 126         r2.error_string = NULL;
 127         r2.keytab_name = r->keytab_name;
 128         nt_status = libnet_SamDump_keytab(ctx, mem_ctx, &r2);
 129         r->error_string = r2.error_string;
 130
 131         return nt_status;
 132 }
 133
 134 NTSTATUS libnet_SamDump_keytab(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
 135 {
 136         switch (r->level) {
 137         case LIBNET_SAMDUMP_GENERIC:
 138                 return libnet_SamDump_keytab_generic(ctx, mem_ctx, r);
 139         case LIBNET_SAMDUMP_NETLOGON:
 140                 return libnet_SamDump_keytab_netlogon(ctx, mem_ctx, r);
 141         }
 142
 143         return NT_STATUS_INVALID_LEVEL;
 144 }