Get rid of WTF::SHA1.

Source/wtf/SHA1.cpp

-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-// A straightforward SHA-1 implementation based on RFC 3174.
-// http://www.ietf.org/rfc/rfc3174.txt
-// The names of functions and variables (such as "a", "b", and "f") follow notations in RFC 3174.
-
-#include "config.h"
-#include "wtf/SHA1.h"
-
-#include "wtf/Assertions.h"
-
-namespace WTF {
-
-static inline uint32_t f(int t, uint32_t b, uint32_t c, uint32_t d)
-{
-    ASSERT(t >= 0 && t < 80);
-    if (t < 20)
-        return (b & c) | ((~b) & d);
-    if (t < 40)
-        return b ^ c ^ d;
-    if (t < 60)
-        return (b & c) | (b & d) | (c & d);
-    return b ^ c ^ d;
-}
-
-static inline uint32_t k(int t)
-{
-    ASSERT(t >= 0 && t < 80);
-    if (t < 20)
-        return 0x5a827999;
-    if (t < 40)
-        return 0x6ed9eba1;
-    if (t < 60)
-        return 0x8f1bbcdc;
-    return 0xca62c1d6;
-}
-
-static inline uint32_t rotateLeft(int n, uint32_t x)
-{
-    ASSERT(n >= 0 && n < 32);
-    return (x << n) | (x >> (32 - n));
-}
-
-SHA1::SHA1()
-{
-    reset();
-}
-
-void SHA1::addBytes(const uint8_t* input, size_t length)
-{
-    while (length--) {
-        ASSERT(m_cursor < 64);
-        m_buffer[m_cursor++] = *input++;
-        ++m_totalBytes;
-        if (m_cursor == 64)
-            processBlock();
-    }
-}
-
-void SHA1::computeHash(Vector<uint8_t, 20>& digest)
-{
-    finalize();
-
-    digest.clear();
-    digest.resize(20);
-    for (size_t i = 0; i < 5; ++i) {
-        // Treat hashValue as a big-endian value.
-        uint32_t hashValue = m_hash[i];
-        for (int j = 0; j < 4; ++j) {
-            digest[4 * i + (3 - j)] = hashValue & 0xFF;
-            hashValue >>= 8;
-        }
-    }
-
-    reset();
-}
-
-void SHA1::finalize()
-{
-    ASSERT(m_cursor < 64);
-    m_buffer[m_cursor++] = 0x80;
-    if (m_cursor > 56) {
-        // Pad out to next block.
-        while (m_cursor < 64)
-            m_buffer[m_cursor++] = 0x00;
-        processBlock();
-    }
-
-    for (size_t i = m_cursor; i < 56; ++i)
-        m_buffer[i] = 0x00;
-
-    // Write the length as a big-endian 64-bit value.
-    uint64_t bits = m_totalBytes * 8;
-    for (int i = 0; i < 8; ++i) {
-        m_buffer[56 + (7 - i)] = bits & 0xFF;
-        bits >>= 8;
-    }
-    m_cursor = 64;
-    processBlock();
-}
-
-void SHA1::processBlock()
-{
-    ASSERT(m_cursor == 64);
-
-    uint32_t w[80] = { 0 };
-    for (int t = 0; t < 16; ++t)
-        w[t] = (m_buffer[t * 4] << 24) | (m_buffer[t * 4 + 1] << 16) | (m_buffer[t * 4 + 2] << 8) | m_buffer[t * 4 + 3];
-    for (int t = 16; t < 80; ++t)
-        w[t] = rotateLeft(1, w[t - 3] ^ w[t - 8] ^ w[t - 14] ^ w[t - 16]);
-
-    uint32_t a = m_hash[0];
-    uint32_t b = m_hash[1];
-    uint32_t c = m_hash[2];
-    uint32_t d = m_hash[3];
-    uint32_t e = m_hash[4];
-
-    for (int t = 0; t < 80; ++t) {
-        uint32_t temp = rotateLeft(5, a) + f(t, b, c, d) + e + w[t] + k(t);
-        e = d;
-        d = c;
-        c = rotateLeft(30, b);
-        b = a;
-        a = temp;
-    }
-
-    m_hash[0] += a;
-    m_hash[1] += b;
-    m_hash[2] += c;
-    m_hash[3] += d;
-    m_hash[4] += e;
-
-    m_cursor = 0;
-}
-
-void SHA1::reset()
-{
-    m_cursor = 0;
-    m_totalBytes = 0;
-    m_hash[0] = 0x67452301;
-    m_hash[1] = 0xefcdab89;
-    m_hash[2] = 0x98badcfe;
-    m_hash[3] = 0x10325476;
-    m_hash[4] = 0xc3d2e1f0;
-
-    // Clear the buffer after use in case it's sensitive.
-    memset(m_buffer, 0, sizeof(m_buffer));
-}
-
-} // namespace WTF