From bd74ed7da467de11128c57c4c424febe4a7e2f39 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Fri, 1 Aug 2014 19:01:10 +0200 Subject: Replaced sha1 implementation --- libs/sha1/sha1.cpp | 455 +++++++++++++++++++++++++++++++---------------------- libs/sha1/sha1.h | 106 +++++++------ 2 files changed, 327 insertions(+), 234 deletions(-) (limited to 'libs/sha1') diff --git a/libs/sha1/sha1.cpp b/libs/sha1/sha1.cpp index fb7bfed6..dc86b2ce 100644 --- a/libs/sha1/sha1.cpp +++ b/libs/sha1/sha1.cpp @@ -1,185 +1,270 @@ -/* - 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 +/* + sha1.cpp - source code of + + ============ + SHA-1 in C++ + ============ + + 100% Public Domain. + + Original C Code + -- Steve Reid + Small changes to fit into bglibs + -- Bruce Guenter + Translation to simpler C++ Code + -- Volker Grabsch +*/ + +#include "sha1.h" +#include +#include +#include + +/* Help macros */ +#define SHA1_ROL(value, bits) (((value) << (bits)) | (((value) & 0xffffffff) >> (32 - (bits)))) +#define SHA1_BLK(i) (block[i&15] = SHA1_ROL(block[(i+13)&15] ^ block[(i+8)&15] ^ block[(i+2)&15] ^ block[i&15],1)) + +/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */ +#define SHA1_R0(v,w,x,y,z,i) z += ((w&(x^y))^y) + block[i] + 0x5a827999 + SHA1_ROL(v,5); w=SHA1_ROL(w,30); +#define SHA1_R1(v,w,x,y,z,i) z += ((w&(x^y))^y) + SHA1_BLK(i) + 0x5a827999 + SHA1_ROL(v,5); w=SHA1_ROL(w,30); +#define SHA1_R2(v,w,x,y,z,i) z += (w^x^y) + SHA1_BLK(i) + 0x6ed9eba1 + SHA1_ROL(v,5); w=SHA1_ROL(w,30); +#define SHA1_R3(v,w,x,y,z,i) z += (((w|x)&y)|(w&x)) + SHA1_BLK(i) + 0x8f1bbcdc + SHA1_ROL(v,5); w=SHA1_ROL(w,30); +#define SHA1_R4(v,w,x,y,z,i) z += (w^x^y) + SHA1_BLK(i) + 0xca62c1d6 + SHA1_ROL(v,5); w=SHA1_ROL(w,30); + +SHA1::SHA1() +{ + reset(); +} + + +void SHA1::update(const std::string &s) +{ + std::istringstream is(s); + update(is); +} + + +void SHA1::update(std::istream &is) +{ + std::string rest_of_buffer; + read(is, rest_of_buffer, BLOCK_BYTES - buffer.size()); + buffer += rest_of_buffer; + + while (is) + { + uint32 block[BLOCK_INTS]; + buffer_to_block(buffer, block); + transform(block); + read(is, buffer, BLOCK_BYTES); + } +} + + +/* + * Add padding and return the message digest. + */ + +std::string SHA1::final() +{ + /* Total number of hashed bits */ + uint64 total_bits = (transforms*BLOCK_BYTES + buffer.size()) * 8; + + /* Padding */ + buffer += 0x80; + unsigned int orig_size = buffer.size(); + while (buffer.size() < BLOCK_BYTES) + { + buffer += (char)0x00; + } + + uint32 block[BLOCK_INTS]; + buffer_to_block(buffer, block); + + if (orig_size > BLOCK_BYTES - 8) + { + transform(block); + for (unsigned int i = 0; i < BLOCK_INTS - 2; i++) + { + block[i] = 0; + } + } + + /* Append total_bits, split this uint64 into two uint32 */ + block[BLOCK_INTS - 1] = total_bits; + block[BLOCK_INTS - 2] = (total_bits >> 32); + transform(block); + + /* Hex std::string */ + std::ostringstream result; + for (unsigned int i = 0; i < DIGEST_INTS; i++) + { + result << std::hex << std::setfill('0') << std::setw(8); + result << (digest[i] & 0xffffffff); + } + + /* Reset for next run */ + reset(); + + return result.str(); +} + + +std::string SHA1::from_file(const std::string &filename) +{ + std::ifstream stream(filename.c_str(), std::ios::binary); + SHA1 checksum; + checksum.update(stream); + return checksum.final(); +} + + +void SHA1::reset() +{ + /* SHA1 initialization constants */ + digest[0] = 0x67452301; + digest[1] = 0xefcdab89; + digest[2] = 0x98badcfe; + digest[3] = 0x10325476; + digest[4] = 0xc3d2e1f0; + + /* Reset counters */ + transforms = 0; + buffer = ""; +} + + +/* + * Hash a single 512-bit block. This is the core of the algorithm. + */ + +void SHA1::transform(uint32 block[BLOCK_BYTES]) +{ + /* Copy digest[] to working vars */ + uint32 a = digest[0]; + uint32 b = digest[1]; + uint32 c = digest[2]; + uint32 d = digest[3]; + uint32 e = digest[4]; + + + /* 4 rounds of 20 operations each. Loop unrolled. */ + SHA1_R0(a,b,c,d,e, 0); + SHA1_R0(e,a,b,c,d, 1); + SHA1_R0(d,e,a,b,c, 2); + SHA1_R0(c,d,e,a,b, 3); + SHA1_R0(b,c,d,e,a, 4); + SHA1_R0(a,b,c,d,e, 5); + SHA1_R0(e,a,b,c,d, 6); + SHA1_R0(d,e,a,b,c, 7); + SHA1_R0(c,d,e,a,b, 8); + SHA1_R0(b,c,d,e,a, 9); + SHA1_R0(a,b,c,d,e,10); + SHA1_R0(e,a,b,c,d,11); + SHA1_R0(d,e,a,b,c,12); + SHA1_R0(c,d,e,a,b,13); + SHA1_R0(b,c,d,e,a,14); + SHA1_R0(a,b,c,d,e,15); + SHA1_R1(e,a,b,c,d,16); + SHA1_R1(d,e,a,b,c,17); + SHA1_R1(c,d,e,a,b,18); + SHA1_R1(b,c,d,e,a,19); + SHA1_R2(a,b,c,d,e,20); + SHA1_R2(e,a,b,c,d,21); + SHA1_R2(d,e,a,b,c,22); + SHA1_R2(c,d,e,a,b,23); + SHA1_R2(b,c,d,e,a,24); + SHA1_R2(a,b,c,d,e,25); + SHA1_R2(e,a,b,c,d,26); + SHA1_R2(d,e,a,b,c,27); + SHA1_R2(c,d,e,a,b,28); + SHA1_R2(b,c,d,e,a,29); + SHA1_R2(a,b,c,d,e,30); + SHA1_R2(e,a,b,c,d,31); + SHA1_R2(d,e,a,b,c,32); + SHA1_R2(c,d,e,a,b,33); + SHA1_R2(b,c,d,e,a,34); + SHA1_R2(a,b,c,d,e,35); + SHA1_R2(e,a,b,c,d,36); + SHA1_R2(d,e,a,b,c,37); + SHA1_R2(c,d,e,a,b,38); + SHA1_R2(b,c,d,e,a,39); + SHA1_R3(a,b,c,d,e,40); + SHA1_R3(e,a,b,c,d,41); + SHA1_R3(d,e,a,b,c,42); + SHA1_R3(c,d,e,a,b,43); + SHA1_R3(b,c,d,e,a,44); + SHA1_R3(a,b,c,d,e,45); + SHA1_R3(e,a,b,c,d,46); + SHA1_R3(d,e,a,b,c,47); + SHA1_R3(c,d,e,a,b,48); + SHA1_R3(b,c,d,e,a,49); + SHA1_R3(a,b,c,d,e,50); + SHA1_R3(e,a,b,c,d,51); + SHA1_R3(d,e,a,b,c,52); + SHA1_R3(c,d,e,a,b,53); + SHA1_R3(b,c,d,e,a,54); + SHA1_R3(a,b,c,d,e,55); + SHA1_R3(e,a,b,c,d,56); + SHA1_R3(d,e,a,b,c,57); + SHA1_R3(c,d,e,a,b,58); + SHA1_R3(b,c,d,e,a,59); + SHA1_R4(a,b,c,d,e,60); + SHA1_R4(e,a,b,c,d,61); + SHA1_R4(d,e,a,b,c,62); + SHA1_R4(c,d,e,a,b,63); + SHA1_R4(b,c,d,e,a,64); + SHA1_R4(a,b,c,d,e,65); + SHA1_R4(e,a,b,c,d,66); + SHA1_R4(d,e,a,b,c,67); + SHA1_R4(c,d,e,a,b,68); + SHA1_R4(b,c,d,e,a,69); + SHA1_R4(a,b,c,d,e,70); + SHA1_R4(e,a,b,c,d,71); + SHA1_R4(d,e,a,b,c,72); + SHA1_R4(c,d,e,a,b,73); + SHA1_R4(b,c,d,e,a,74); + SHA1_R4(a,b,c,d,e,75); + SHA1_R4(e,a,b,c,d,76); + SHA1_R4(d,e,a,b,c,77); + SHA1_R4(c,d,e,a,b,78); + SHA1_R4(b,c,d,e,a,79); + + /* Add the working vars back into digest[] */ + digest[0] += a; + digest[1] += b; + digest[2] += c; + digest[3] += d; + digest[4] += e; + + /* Count the number of transformations */ + transforms++; +} + + +void SHA1::buffer_to_block(const std::string &buffer, uint32 block[BLOCK_BYTES]) +{ + /* Convert the std::string (byte buffer) to a uint32 array (MSB) */ + for (unsigned int i = 0; i < BLOCK_INTS; i++) + { + block[i] = (buffer[4*i+3] & 0xff) + | (buffer[4*i+2] & 0xff)<<8 + | (buffer[4*i+1] & 0xff)<<16 + | (buffer[4*i+0] & 0xff)<<24; + } +} + + +void SHA1::read(std::istream &is, std::string &s, int max) +{ + char sbuf[max]; + is.read(sbuf, max); + s.assign(sbuf, is.gcount()); +} + + +std::string sha1(const std::string &string) +{ + SHA1 checksum; + checksum.update(string); + return checksum.final(); +} diff --git a/libs/sha1/sha1.h b/libs/sha1/sha1.h index 540c156d..15edee12 100644 --- a/libs/sha1/sha1.h +++ b/libs/sha1/sha1.h @@ -1,49 +1,57 @@ -/* - 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. - */ - -#ifndef SHA1_DEFINED -#define SHA1_DEFINED - -namespace sha1 -{ - - /** - @param src points to any kind of data to be hashed. - @param bytelength the number of bytes to hash from the src pointer. - @param hash should point to a buffer of at least 20 bytes of size for storing the sha1 result in. - */ - void calc(const void* src, const int bytelength, unsigned char* hash); - - /** - @param hash is 20 bytes of sha1 hash. This is the same data that is the result from the calc function. - @param hexstring should point to a buffer of at least 41 bytes of size for storing the hexadecimal representation of the hash. A zero will be written at position 40, so the buffer will be a valid zero ended string. - */ - void toHexString(const unsigned char* hash, char* hexstring); - -} // namespace sha1 - -#endif // SHA1_DEFINED +/* + sha1.h - header of + + ============ + SHA-1 in C++ + ============ + + 100% Public Domain. + + Original C Code + -- Steve Reid + Small changes to fit into bglibs + -- Bruce Guenter + Translation to simpler C++ Code + -- Volker Grabsch +*/ + +#ifndef SHA1_HPP +#define SHA1_HPP + + +#include +#include + +class SHA1 +{ +public: + SHA1(); + void update(const std::string &s); + void update(std::istream &is); + std::string final(); + static std::string from_file(const std::string &filename); + +private: + typedef unsigned long int uint32; /* just needs to be at least 32bit */ + typedef unsigned long long uint64; /* just needs to be at least 64bit */ + + static const unsigned int DIGEST_INTS = 5; /* number of 32bit integers per SHA1 digest */ + static const unsigned int BLOCK_INTS = 16; /* number of 32bit integers per SHA1 block */ + static const unsigned int BLOCK_BYTES = BLOCK_INTS * 4; + + uint32 digest[DIGEST_INTS]; + std::string buffer; + uint64 transforms; + + void reset(); + void transform(uint32 block[BLOCK_BYTES]); + + static void buffer_to_block(const std::string &buffer, uint32 block[BLOCK_BYTES]); + static void read(std::istream &is, std::string &s, int max); +}; + +std::string sha1(const std::string &string); + + + +#endif /* SHA1_HPP */ -- cgit v1.2.3