1// Copyright (c) 2011 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#pragma once 8 9#include <string> 10 11namespace crypto { 12 13// These functions perform SHA-256 operations. 14// 15// Functions for SHA-384 and SHA-512 can be added when the need arises. 16 17enum { 18 SHA256_LENGTH = 32 // length in bytes of a SHA-256 hash 19}; 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. 24void SHA256HashString(const std::string& str, 25 void* output, size_t len); 26 27// Convenience version of the above that returns the result in a 32-byte 28// string. 29std::string SHA256HashString(const std::string& str); 30 31} // namespace crypto 32 33#endif // CRYPTO_SHA2_H_ 34