source3/rpc_client/init_samr.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Guenther Deschner                  2008.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "../libcli/auth/libcli_auth.h"
  22 #include "../lib/crypto/md5.h"
  23 #include "../lib/crypto/arcfour.h"
  24 #include "rpc_client/init_samr.h"
  25
  26 /*************************************************************************
  27  inits a samr_CryptPasswordEx structure
  28  *************************************************************************/
  29
  30 void init_samr_CryptPasswordEx(const char *pwd,
  31                                DATA_BLOB *session_key,
  32                                struct samr_CryptPasswordEx *pwd_buf)
  33 {
  34         /* samr_CryptPasswordEx */
  35
  36         uchar pwbuf[532];
  37         struct MD5Context md5_ctx;
  38         uint8_t confounder[16];
  39         DATA_BLOB confounded_session_key = data_blob(NULL, 16);
  40
  41         encode_pw_buffer(pwbuf, pwd, STR_UNICODE);
  42
  43         generate_random_buffer((uint8_t *)confounder, 16);
  44
  45         MD5Init(&md5_ctx);
  46         MD5Update(&md5_ctx, confounder, 16);
  47         MD5Update(&md5_ctx, session_key->data,
  48                             session_key->length);
  49         MD5Final(confounded_session_key.data, &md5_ctx);
  50
  51         arcfour_crypt_blob(pwbuf, 516, &confounded_session_key);
  52         memcpy(&pwbuf[516], confounder, 16);
  53
  54         memcpy(pwd_buf->data, pwbuf, sizeof(pwbuf));
  55         data_blob_free(&confounded_session_key);
  56 }
  57
  58 /*************************************************************************
  59  inits a samr_CryptPassword structure
  60  *************************************************************************/
  61
  62 void init_samr_CryptPassword(const char *pwd,
  63                              DATA_BLOB *session_key,
  64                              struct samr_CryptPassword *pwd_buf)
  65 {
  66         /* samr_CryptPassword */
  67
  68         encode_pw_buffer(pwd_buf->data, pwd, STR_UNICODE);
  69         arcfour_crypt_blob(pwd_buf->data, 516, session_key);
  70 }