2 *Copyright (C) 2011 Google Inc. All rights reserved.
4 *Redistribution and use in source and binary forms, with or without
5 *modification, are permitted provided that the following conditions are
8 ** Redistributions of source code must retain the above copyright
9 *notice, this list of conditions and the following disclaimer.
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11 *copyright notice, this list of conditions and the following disclaimer
12 *in the documentation and/or other materials provided with the
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.
18 *THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31 // A straightforward SHA-1 implementation based on RFC 3174.
32 // http://www.ietf.org/rfc/rfc3174.txt
33 // The names of functions and variables (such as "a", "b", and "f")
34 // follow notations in RFC 3174.
52 uint64_t m_totalBytes;
54 static inline uint32_t f(int t, uint32_t b, uint32_t c, uint32_t d) {
55 if (t < 20) return (b & c) | ((~b) & d);
56 if (t < 40) return b ^ c ^ d;
57 if (t < 60) return (b & c) | (b & d) | (c & d);
60 static inline uint32_t k(int t) {
61 if (t < 20) return 0x5a827999;
62 if (t < 40) return 0x6ed9eba1;
63 if (t < 60) return 0x8f1bbcdc;
66 static inline uint32_t rotateLeft(int n, uint32_t x) {
67 return (x << n) | (x >> (32-n));
71 void addBytes(const uint8_t* input, size_t length);
72 void computeHash(uint8_t *digest);