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#ifndef TPM_MANAGER_SERVER_OPENSSL_CRYPTO_UTIL_H_
18#define TPM_MANAGER_SERVER_OPENSSL_CRYPTO_UTIL_H_
19
20#include <string>
21
22#include <base/compiler_specific.h>
23#include <base/macros.h>
24
25namespace tpm_manager {
26
27// This class is used to provide a mockable interface for openssl calls.
28class OpensslCryptoUtil {
29 public:
30  OpensslCryptoUtil() = default;
31  virtual ~OpensslCryptoUtil() = default;
32
33  // This method sets the out argument |random_data| to a string with at
34  // least |num_bytes| of random data and returns true on success.
35  virtual bool GetRandomBytes(size_t num_bytes,
36                              std::string* random_data) WARN_UNUSED_RESULT = 0;
37
38 private:
39  DISALLOW_COPY_AND_ASSIGN(OpensslCryptoUtil);
40};
41
42}  // namespace tpm_manager
43
44#endif  // TPM_MANAGER_SERVER_OPENSSL_CRYPTO_UTIL_H_
45