content/child/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 CONTENT_CHILD_WEBCRYPTO_CRYPTO_DATA_H_
   6 #define CONTENT_CHILD_WEBCRYPTO_CRYPTO_DATA_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "content/common/content_export.h"
  13 #include "third_party/WebKit/public/platform/WebVector.h"
  14
  15 namespace content {
  16
  17 namespace webcrypto {
  18
  19 // Helper to pass around a range of immutable bytes. This is conceptually
  20 // similar to base::StringPiece, but for crypto byte data.
  21 //
  22 // The data used at construction is NOT owned, and should remain valid as long
  23 // as the CryptoData is being used.
  24 class CONTENT_EXPORT CryptoData {
  25  public:
  26   // Constructs empty data.
  27   CryptoData();
  28
  29   CryptoData(const unsigned char* bytes, unsigned int byte_length);
  30
  31   // These constructors do NOT copy the data. Hence the base pointer should
  32   // remain valid for the lifetime of CryptoData.
  33   explicit CryptoData(const std::vector<unsigned char>& bytes);
  34   explicit CryptoData(const std::string& bytes);
  35   explicit CryptoData(const blink::WebVector<unsigned char>& bytes);
  36
  37   const unsigned char* bytes() const { return bytes_; }
  38   unsigned int byte_length() const { return byte_length_; }
  39
  40  private:
  41   const unsigned char* const bytes_;
  42   const unsigned int byte_length_;
  43 };
  44
  45 }  // namespace webcrypto
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_CHILD_WEBCRYPTO_CRYPTO_DATA_H_