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