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 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 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.
  29 CRYPTO_EXPORT std::string SHA256HashString(const std::string& str);
  30
  31 }  // namespace crypto
  32
  33 #endif  // CRYPTO_SHA2_H_