From 675b4aa878f16291ce33fced48a2bc7425f635ae Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Sun, 24 Nov 2013 14:19:41 +0000 Subject: Moved source to src --- src/md5/md5.cpp | 369 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 369 insertions(+) create mode 100644 src/md5/md5.cpp (limited to 'src/md5/md5.cpp') diff --git a/src/md5/md5.cpp b/src/md5/md5.cpp new file mode 100644 index 000000000..eae0fc3f2 --- /dev/null +++ b/src/md5/md5.cpp @@ -0,0 +1,369 @@ +/* MD5 + converted to C++ class by Frank Thilo (thilo@unix-ag.org) + for bzflag (http://www.bzflag.org) + + based on: + + md5.h and md5.c + reference implemantion of RFC 1321 + + Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All +rights reserved. + +License to copy and use this software is granted provided that it +is identified as the "RSA Data Security, Inc. MD5 Message-Digest +Algorithm" in all material mentioning or referencing this software +or this function. + +License is also granted to make and use derivative works provided +that such works are identified as "derived from the RSA Data +Security, Inc. MD5 Message-Digest Algorithm" in all material +mentioning or referencing the derived work. + +RSA Data Security, Inc. makes no representations concerning either +the merchantability of this software or the suitability of this +software for any particular purpose. It is provided "as is" +without express or implied warranty of any kind. + +These notices must be retained in any copies of any part of this +documentation and/or software. + +*/ + +/* interface header */ +#include "md5.h" + +/* system implementation headers */ +#include + +#ifndef _WIN32 + #include +#endif + + + + + +// Constants for MD5Transform routine. +#define S11 7 +#define S12 12 +#define S13 17 +#define S14 22 +#define S21 5 +#define S22 9 +#define S23 14 +#define S24 20 +#define S31 4 +#define S32 11 +#define S33 16 +#define S34 23 +#define S41 6 +#define S42 10 +#define S43 15 +#define S44 21 + +/////////////////////////////////////////////// + +// F, G, H and I are basic MD5 functions. +inline MD5::uint4 MD5::F(uint4 x, uint4 y, uint4 z) { + return x&y | ~x&z; +} + +inline MD5::uint4 MD5::G(uint4 x, uint4 y, uint4 z) { + return x&z | y&~z; +} + +inline MD5::uint4 MD5::H(uint4 x, uint4 y, uint4 z) { + return x^y^z; +} + +inline MD5::uint4 MD5::I(uint4 x, uint4 y, uint4 z) { + return y ^ (x | ~z); +} + +// rotate_left rotates x left n bits. +inline MD5::uint4 MD5::rotate_left(uint4 x, int n) { + return (x << n) | (x >> (32-n)); +} + +// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. +// Rotation is separate from addition to prevent recomputation. +inline void MD5::FF(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) { + a = rotate_left(a+ F(b,c,d) + x + ac, s) + b; +} + +inline void MD5::GG(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) { + a = rotate_left(a + G(b,c,d) + x + ac, s) + b; +} + +inline void MD5::HH(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) { + a = rotate_left(a + H(b,c,d) + x + ac, s) + b; +} + +inline void MD5::II(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) { + a = rotate_left(a + I(b,c,d) + x + ac, s) + b; +} + +////////////////////////////////////////////// + +// default ctor, just initailize +MD5::MD5() +{ + init(); +} + +////////////////////////////////////////////// + +// nifty shortcut ctor, compute MD5 for string and finalize it right away +MD5::MD5(const std::string &text) +{ + init(); + update(text.c_str(), text.length()); + finalize(); +} + +////////////////////////////// + +void MD5::init() +{ + finalized=false; + + count[0] = 0; + count[1] = 0; + + // load magic initialization constants. + state[0] = 0x67452301; + state[1] = 0xefcdab89; + state[2] = 0x98badcfe; + state[3] = 0x10325476; +} + +////////////////////////////// + +// decodes input (unsigned char) into output (uint4). Assumes len is a multiple of 4. +void MD5::decode(uint4 output[], const uint1 input[], size_type len) +{ + for (unsigned int i = 0, j = 0; j < len; i++, j += 4) + output[i] = ((uint4)input[j]) | (((uint4)input[j+1]) << 8) | + (((uint4)input[j+2]) << 16) | (((uint4)input[j+3]) << 24); +} + +////////////////////////////// + +// encodes input (uint4) into output (unsigned char). Assumes len is +// a multiple of 4. +void MD5::encode(uint1 output[], const uint4 input[], size_type len) +{ + for (size_type i = 0, j = 0; j < len; i++, j += 4) { + output[j] = input[i] & 0xff; + output[j+1] = (input[i] >> 8) & 0xff; + output[j+2] = (input[i] >> 16) & 0xff; + output[j+3] = (input[i] >> 24) & 0xff; + } +} + +////////////////////////////// + +// apply MD5 algo on a block +void MD5::transform(const uint1 block[blocksize]) +{ + uint4 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; + decode (x, block, blocksize); + + /* Round 1 */ + FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ + FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ + FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ + FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ + FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ + FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ + FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ + FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ + FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ + FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ + FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ + FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ + FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ + FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ + FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ + FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ + + /* Round 2 */ + GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ + GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ + GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ + GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ + GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ + GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ + GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ + GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ + GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ + GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ + GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ + GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ + GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ + GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ + GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ + GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ + + /* Round 3 */ + HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ + HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ + HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ + HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ + HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ + HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ + HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ + HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ + HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ + HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ + HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ + HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ + HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ + HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ + HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ + HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ + + /* Round 4 */ + II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ + II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ + II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ + II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ + II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ + II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ + II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ + II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ + II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ + II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ + II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ + II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ + II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ + II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ + II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ + II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ + + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + + // Zeroize sensitive information. + memset(x, 0, sizeof x); +} + +////////////////////////////// + +// MD5 block update operation. Continues an MD5 message-digest +// operation, processing another message block +void MD5::update(const unsigned char input[], size_type length) +{ + // compute number of bytes mod 64 + size_type index = count[0] / 8 % blocksize; + + // Update number of bits + if ((count[0] += (length << 3)) < (length << 3)) + count[1]++; + count[1] += (length >> 29); + + // number of bytes we need to fill in buffer + size_type firstpart = 64 - index; + + size_type i; + + // transform as many times as possible. + if (length >= firstpart) + { + // fill buffer first, transform + memcpy(&buffer[index], input, firstpart); + transform(buffer); + + // transform chunks of blocksize (64 bytes) + for (i = firstpart; i + blocksize <= length; i += blocksize) + transform(&input[i]); + + index = 0; + } + else + i = 0; + + // buffer remaining input + memcpy(&buffer[index], &input[i], length-i); +} + +////////////////////////////// + +// for convenience provide a verson with signed char +void MD5::update(const char input[], size_type length) +{ + update((const unsigned char*)input, length); +} + +////////////////////////////// + +// MD5 finalization. Ends an MD5 message-digest operation, writing the +// the message digest and zeroizing the context. +MD5& MD5::finalize() +{ + static unsigned char padding[64] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + }; + + if (!finalized) { + // Save number of bits + unsigned char bits[8]; + encode(bits, count, 8); + + // pad out to 56 mod 64. + size_type index = count[0] / 8 % 64; + size_type padLen = (index < 56) ? (56 - index) : (120 - index); + update(padding, padLen); + + // Append length (before padding) + update(bits, 8); + + // Store state in digest + encode(digest, state, 16); + + // Zeroize sensitive information. + memset(buffer, 0, sizeof buffer); + memset(count, 0, sizeof count); + + finalized=true; + } + + return *this; +} + +////////////////////////////// + +// return hex representation of digest as string +std::string MD5::hexdigest() const +{ + if (!finalized) + return ""; + + char buf[33]; + for (int i=0; i<16; i++) + sprintf(buf+i*2, "%02x", digest[i]); + buf[32]=0; + + return std::string(buf); +} + +////////////////////////////// + +std::ostream& operator<<(std::ostream& out, MD5 md5) +{ + return out << md5.hexdigest(); +} + +////////////////////////////// + +std::string md5(const std::string & str) +{ + MD5 md5 = MD5(str); + + return md5.hexdigest(); +} -- cgit v1.2.3