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/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Copyright (C) Guenther Deschner 2008.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../libcli/auth/libcli_auth.h"
#include "rpc_client/init_samr.h"
#include "librpc/rpc/dcerpc_samr.h"
#include "lib/crypto/gnutls_helpers.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
/*************************************************************************
inits a samr_CryptPasswordEx structure
*************************************************************************/
NTSTATUS init_samr_CryptPasswordEx(const char *pwd,
DATA_BLOB *session_key,
struct samr_CryptPasswordEx *pwd_buf)
{
return encode_rc4_passwd_buffer(pwd, session_key, pwd_buf);
}
/*************************************************************************
inits a samr_CryptPassword structure
*************************************************************************/
NTSTATUS init_samr_CryptPassword(const char *pwd,
DATA_BLOB *session_key,
struct samr_CryptPassword *pwd_buf)
{
/* samr_CryptPassword */
gnutls_cipher_hd_t cipher_hnd = NULL;
gnutls_datum_t sess_key = {
.data = session_key->data,
.size = session_key->length,
};
bool ok;
int rc;
ok = encode_pw_buffer(pwd_buf->data, pwd, STR_UNICODE);
if (!ok) {
return NT_STATUS_INTERNAL_ERROR;
}
rc = gnutls_cipher_init(&cipher_hnd,
GNUTLS_CIPHER_ARCFOUR_128,
&sess_key,
NULL);
if (rc != 0) {
return gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
}
rc = gnutls_cipher_encrypt(cipher_hnd,
pwd_buf->data,
516);
gnutls_cipher_deinit(cipher_hnd);
if (rc != 0) {
return gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
}
return NT_STATUS_OK;
}
NTSTATUS init_samr_CryptPasswordAES(TALLOC_CTX *mem_ctx,
const char *password,
DATA_BLOB *salt,
DATA_BLOB *session_key,
struct samr_EncryptedPasswordAES *ppwd_buf)
{
uint8_t pw_data[514] = {0};
DATA_BLOB plaintext = {
.data = pw_data,
.length = sizeof(pw_data),
};
DATA_BLOB ciphertext = data_blob_null;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
bool ok;
if (ppwd_buf == NULL) {
return NT_STATUS_INVALID_PARAMETER;
}
ok = encode_pwd_buffer514_from_str(pw_data, password, STR_UNICODE);
if (!ok) {
return NT_STATUS_INTERNAL_ERROR;
}
status = samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(
mem_ctx,
&plaintext,
session_key,
&samr_aes256_enc_key_salt,
&samr_aes256_mac_key_salt,
salt,
&ciphertext,
ppwd_buf->auth_data);
BURN_DATA(pw_data);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ppwd_buf->cipher_len = ciphertext.length;
ppwd_buf->cipher = ciphertext.data;
ppwd_buf->PBKDF2Iterations = 0;
SMB_ASSERT(salt->length == sizeof(ppwd_buf->salt));
memcpy(ppwd_buf->salt, salt->data, salt->length);
return NT_STATUS_OK;
}
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