diff options
Diffstat (limited to 'audio/softsynth/mt32/sha1/sha1.cpp')
| -rw-r--r-- | audio/softsynth/mt32/sha1/sha1.cpp | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/audio/softsynth/mt32/sha1/sha1.cpp b/audio/softsynth/mt32/sha1/sha1.cpp deleted file mode 100644 index a0c5e13a36..0000000000 --- a/audio/softsynth/mt32/sha1/sha1.cpp +++ /dev/null @@ -1,185 +0,0 @@ -/* - Copyright (c) 2011, Micael Hildenborg - 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 Micael Hildenborg 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 Micael Hildenborg ''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 Micael Hildenborg 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. - */ - -/* - Contributors: - Gustav - Several members in the gamedev.se forum. - Gregory Petrosyan - */ - -#include "sha1.h" - -namespace sha1 -{ - namespace // local - { - // Rotate an integer value to left. - inline unsigned int rol(const unsigned int value, - const unsigned int steps) - { - return ((value << steps) | (value >> (32 - steps))); - } - - // Sets the first 16 integers in the buffert to zero. - // Used for clearing the W buffert. - inline void clearWBuffert(unsigned int* buffert) - { - for (int pos = 16; --pos >= 0;) - { - buffert[pos] = 0; - } - } - - void innerHash(unsigned int* result, unsigned int* w) - { - unsigned int a = result[0]; - unsigned int b = result[1]; - unsigned int c = result[2]; - unsigned int d = result[3]; - unsigned int e = result[4]; - - int round = 0; - - #define sha1macro(func,val) \ - { \ - const unsigned int t = rol(a, 5) + (func) + e + val + w[round]; \ - e = d; \ - d = c; \ - c = rol(b, 30); \ - b = a; \ - a = t; \ - } - - while (round < 16) - { - sha1macro((b & c) | (~b & d), 0x5a827999) - ++round; - } - while (round < 20) - { - w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); - sha1macro((b & c) | (~b & d), 0x5a827999) - ++round; - } - while (round < 40) - { - w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); - sha1macro(b ^ c ^ d, 0x6ed9eba1) - ++round; - } - while (round < 60) - { - w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); - sha1macro((b & c) | (b & d) | (c & d), 0x8f1bbcdc) - ++round; - } - while (round < 80) - { - w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); - sha1macro(b ^ c ^ d, 0xca62c1d6) - ++round; - } - - #undef sha1macro - - result[0] += a; - result[1] += b; - result[2] += c; - result[3] += d; - result[4] += e; - } - } // namespace - - void calc(const void* src, const int bytelength, unsigned char* hash) - { - // Init the result array. - unsigned int result[5] = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 }; - - // Cast the void src pointer to be the byte array we can work with. - const unsigned char* sarray = (const unsigned char*) src; - - // The reusable round buffer - unsigned int w[80]; - - // Loop through all complete 64byte blocks. - const int endOfFullBlocks = bytelength - 64; - int endCurrentBlock; - int currentBlock = 0; - - while (currentBlock <= endOfFullBlocks) - { - endCurrentBlock = currentBlock + 64; - - // Init the round buffer with the 64 byte block data. - for (int roundPos = 0; currentBlock < endCurrentBlock; currentBlock += 4) - { - // This line will swap endian on big endian and keep endian on little endian. - w[roundPos++] = (unsigned int) sarray[currentBlock + 3] - | (((unsigned int) sarray[currentBlock + 2]) << 8) - | (((unsigned int) sarray[currentBlock + 1]) << 16) - | (((unsigned int) sarray[currentBlock]) << 24); - } - innerHash(result, w); - } - - // Handle the last and not full 64 byte block if existing. - endCurrentBlock = bytelength - currentBlock; - clearWBuffert(w); - int lastBlockBytes = 0; - for (;lastBlockBytes < endCurrentBlock; ++lastBlockBytes) - { - w[lastBlockBytes >> 2] |= (unsigned int) sarray[lastBlockBytes + currentBlock] << ((3 - (lastBlockBytes & 3)) << 3); - } - w[lastBlockBytes >> 2] |= 0x80 << ((3 - (lastBlockBytes & 3)) << 3); - if (endCurrentBlock >= 56) - { - innerHash(result, w); - clearWBuffert(w); - } - w[15] = bytelength << 3; - innerHash(result, w); - - // Store hash in result pointer, and make sure we get in in the correct order on both endian models. - for (int hashByte = 20; --hashByte >= 0;) - { - hash[hashByte] = (result[hashByte >> 2] >> (((3 - hashByte) & 0x3) << 3)) & 0xff; - } - } - - void toHexString(const unsigned char* hash, char* hexstring) - { - const char hexDigits[] = { "0123456789abcdef" }; - - for (int hashByte = 20; --hashByte >= 0;) - { - hexstring[hashByte << 1] = hexDigits[(hash[hashByte] >> 4) & 0xf]; - hexstring[(hashByte << 1) + 1] = hexDigits[hash[hashByte] & 0xf]; - } - hexstring[40] = 0; - } -} // namespace sha1 |