wtf/SHA1.h

   1 /*
   2  * Copyright (C) 2011 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef WTF_SHA1_h
  32 #define WTF_SHA1_h
  33
  34 #include <wtf/Vector.h>
  35
  36 namespace WTF {
  37
  38 class SHA1 {
  39 public:
  40     SHA1();
  41
  42     void addBytes(const Vector<uint8_t>& input)
  43     {
  44         addBytes(input.data(), input.size());
  45     }
  46     void addBytes(const uint8_t* input, size_t length);
  47
  48     // computeHash has a side effect of resetting the state of the object.
  49     void computeHash(Vector<uint8_t, 20>&);
  50
  51 private:
  52     void finalize();
  53     void processBlock();
  54     void reset();
  55
  56     uint8_t m_buffer[64];
  57     size_t m_cursor; // Number of bytes filled in m_buffer (0-64).
  58     uint64_t m_totalBytes; // Number of bytes added so far.
  59     uint32_t m_hash[5];
  60 };
  61
  62 } // namespace WTF
  63
  64 using WTF::SHA1;
  65
  66 #endif // WTF_SHA1_h