1//
2// Copyright (C) 2015 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#include "tpm_manager/server/openssl_crypto_util_impl.h"
18
19#include <base/logging.h>
20#include <base/stl_util.h>
21#include <openssl/rand.h>
22
23namespace tpm_manager {
24
25bool OpensslCryptoUtilImpl::GetRandomBytes(size_t num_bytes,
26                                           std::string* random_data) {
27  random_data->resize(num_bytes);
28  unsigned char* random_buffer =
29      reinterpret_cast<unsigned char*>(string_as_array(random_data));
30  if (RAND_bytes(random_buffer, num_bytes) != 1) {
31    LOG(ERROR) << "Error getting random bytes using Openssl.";
32    random_data->clear();
33    return false;
34  }
35  return true;
36}
37
38}  // namespace tpm_manager
39