components/webcrypto/crypto_data.h

   1 // Copyright 2014 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 COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_
   6 #define COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "third_party/WebKit/public/platform/WebVector.h"
  13
  14 namespace webcrypto {
  15
  16 // Helper to pass around a range of immutable bytes. This is conceptually
  17 // similar to base::StringPiece, but for crypto byte data.
  18 //
  19 // The data used at construction is NOT owned, and should remain valid as long
  20 // as the CryptoData is being used.
  21 class CryptoData {
  22  public:
  23   // Constructs empty data.
  24   CryptoData();
  25
  26   CryptoData(const unsigned char* bytes, unsigned int byte_length);
  27
  28   // These constructors do NOT copy the data. Hence the base pointer should
  29   // remain valid for the lifetime of CryptoData.
  30   explicit CryptoData(const std::vector<unsigned char>& bytes);
  31   explicit CryptoData(const std::string& bytes);
  32   explicit CryptoData(const blink::WebVector<unsigned char>& bytes);
  33
  34   const unsigned char* bytes() const { return bytes_; }
  35   unsigned int byte_length() const { return byte_length_; }
  36
  37  private:
  38   const unsigned char* const bytes_;
  39   const unsigned int byte_length_;
  40 };
  41
  42 }  // namespace webcrypto
  43
  44 #endif  // COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_