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 
25 namespace tpm_manager {
26 
27 // This class is used to provide a mockable interface for openssl calls.
28 class 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