crypto/sha2.h

   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
  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 enum {
  20   SHA256_LENGTH = 32  // length in bytes of a SHA-256 hash
  21 };
  22
  23 // Computes the SHA-256 hash of the input string 'str' and stores the first
  24 // 'len' bytes of the hash in the output buffer 'output'.  If 'len' > 32,
  25 // only 32 bytes (the full hash) are stored in the 'output' buffer.
  26 CRYPTO_EXPORT void SHA256HashString(const std::string& str,
  27                                     void* output, size_t len);
  28
  29 // Convenience version of the above that returns the result in a 32-byte
  30 // string.
  31 CRYPTO_EXPORT std::string SHA256HashString(const std::string& str);
  32
  33 }  // namespace crypto
  34
  35 #endif  // CRYPTO_SHA2_H_