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      1 // Copyright (c) 2010 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 CHROME_BROWSER_SYNC_UTIL_CRYPTO_HELPERS_H_
      6 #define CHROME_BROWSER_SYNC_UTIL_CRYPTO_HELPERS_H_
      7 #pragma once
      8 
      9 #include <string>
     10 #include <vector>
     11 
     12 // An object to handle calculation of MD5 sums.
     13 #include "base/basictypes.h"
     14 #include "base/md5.h"
     15 #include "base/port.h"
     16 
     17 class MD5Calculator {
     18  protected:
     19   MD5Context context_;
     20   std::vector<uint8> bin_digest_;
     21 
     22   void CalcDigest();
     23  public:
     24   MD5Calculator();
     25   ~MD5Calculator();
     26   void AddData(const uint8* data, int length);
     27   void AddData(const char* data, int length) {
     28     AddData(reinterpret_cast<const uint8*>(data), length);
     29   }
     30   std::string GetHexDigest();
     31   const std::vector<uint8>& GetDigest();
     32  private:
     33   DISALLOW_COPY_AND_ASSIGN(MD5Calculator);
     34 };
     35 
     36 void GetRandomBytes(char* output, int output_length);
     37 std::string Generate128BitRandomHexString();
     38 
     39 #endif  // CHROME_BROWSER_SYNC_UTIL_CRYPTO_HELPERS_H_
     40