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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CRYPTO_SHA2_H_ | 5 #ifndef CRYPTO_SHA2_H_ |
6 #define CRYPTO_SHA2_H_ | 6 #define CRYPTO_SHA2_H_ |
7 #pragma once | |
8 | 7 |
9 #include <string> | 8 #include <string> |
10 | 9 |
11 #include "base/string_piece.h" | 10 #include "base/string_piece.h" |
12 #include "crypto/crypto_export.h" | 11 #include "crypto/crypto_export.h" |
13 | 12 |
14 namespace crypto { | 13 namespace crypto { |
15 | 14 |
16 // These functions perform SHA-256 operations. | 15 // These functions perform SHA-256 operations. |
17 // | 16 // |
18 // Functions for SHA-384 and SHA-512 can be added when the need arises. | 17 // Functions for SHA-384 and SHA-512 can be added when the need arises. |
19 | 18 |
20 static const size_t kSHA256Length = 32; // Length in bytes of a SHA-256 hash. | 19 static const size_t kSHA256Length = 32; // Length in bytes of a SHA-256 hash. |
21 | 20 |
22 // Computes the SHA-256 hash of the input string 'str' and stores the first | 21 // Computes the SHA-256 hash of the input string 'str' and stores the first |
23 // 'len' bytes of the hash in the output buffer 'output'. If 'len' > 32, | 22 // 'len' bytes of the hash in the output buffer 'output'. If 'len' > 32, |
24 // only 32 bytes (the full hash) are stored in the 'output' buffer. | 23 // only 32 bytes (the full hash) are stored in the 'output' buffer. |
25 CRYPTO_EXPORT void SHA256HashString(const base::StringPiece& str, | 24 CRYPTO_EXPORT void SHA256HashString(const base::StringPiece& str, |
26 void* output, size_t len); | 25 void* output, size_t len); |
27 | 26 |
28 // Convenience version of the above that returns the result in a 32-byte | 27 // Convenience version of the above that returns the result in a 32-byte |
29 // string. | 28 // string. |
30 CRYPTO_EXPORT std::string SHA256HashString(const base::StringPiece& str); | 29 CRYPTO_EXPORT std::string SHA256HashString(const base::StringPiece& str); |
31 | 30 |
32 } // namespace crypto | 31 } // namespace crypto |
33 | 32 |
34 #endif // CRYPTO_SHA2_H_ | 33 #endif // CRYPTO_SHA2_H_ |
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