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 
addBytes(const Vector<uint8_t> & input)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
67