/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // LibSha512 // // Implementation of SHA512 hash function. // Original author: Tom St Denis, tomstdenis@gmail.com, http://libtom.org // Modified by WaterJuice retaining Public Domain license. // Modified by William Feely for the DXGL installer. // // This is free and unencumbered software released into the public domain - June 2013 waterjuice.org /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // IMPORTS /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #include "LibSha512.h" //#include // Quick and dirty memcpy void *__memcpy(unsigned char *dest, unsigned char *src, size_t size) { size_t i; for (i = 0; i < size; i++) dest[i] = src[i]; return dest; } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // MACROS /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #define ROR64( value, bits ) (((value) >> (bits)) | ((value) << (64 - (bits)))) #define MIN( x, y ) ( ((x)<(y))?(x):(y) ) #define LOAD64H( x, y ) \ { x = (((uint64_t)((y)[0] & 255))<<56)|(((uint64_t)((y)[1] & 255))<<48) | \ (((uint64_t)((y)[2] & 255))<<40)|(((uint64_t)((y)[3] & 255))<<32) | \ (((uint64_t)((y)[4] & 255))<<24)|(((uint64_t)((y)[5] & 255))<<16) | \ (((uint64_t)((y)[6] & 255))<<8)|(((uint64_t)((y)[7] & 255))); } #define STORE64H( x, y ) \ { (y)[0] = (uint8_t)(((x)>>56)&255); (y)[1] = (uint8_t)(((x)>>48)&255); \ (y)[2] = (uint8_t)(((x)>>40)&255); (y)[3] = (uint8_t)(((x)>>32)&255); \ (y)[4] = (uint8_t)(((x)>>24)&255); (y)[5] = (uint8_t)(((x)>>16)&255); \ (y)[6] = (uint8_t)(((x)>>8)&255); (y)[7] = (uint8_t)((x)&255); } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // CONSTANTS /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // The K array static const uint64_t K[80] = { 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL }; #define BLOCK_SIZE 128 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // INTERNAL FUNCTIONS /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Various logical functions #define Ch( x, y, z ) (z ^ (x & (y ^ z))) #define Maj(x, y, z ) (((x | y) & z) | (x & y)) #define S( x, n ) ROR64( x, n ) #define R( x, n ) (((x)&0xFFFFFFFFFFFFFFFFULL)>>((uint64_t)n)) #define Sigma0( x ) (S(x, 28) ^ S(x, 34) ^ S(x, 39)) #define Sigma1( x ) (S(x, 14) ^ S(x, 18) ^ S(x, 41)) #define Gamma0( x ) (S(x, 1) ^ S(x, 8) ^ R(x, 7)) #define Gamma1( x ) (S(x, 19) ^ S(x, 61) ^ R(x, 6)) #define Sha512Round( a, b, c, d, e, f, g, h, i ) \ t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \ t1 = Sigma0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // TransformFunction // // Compress 1024-bits /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// static void TransformFunction ( Sha512Context* Context, uint8_t* Buffer ) { uint64_t S[8]; uint64_t W[80]; uint64_t t0; uint64_t t1; int i; // Copy state into S for( i=0; i<8; i++ ) { S[i] = Context->state[i]; } // Copy the state into 1024-bits into W[0..15] for( i=0; i<16; i++ ) { LOAD64H(W[i], Buffer + (8*i)); } // Fill W[16..79] for( i=16; i<80; i++ ) { W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16]; } // Compress for( i=0; i<80; i+=8 ) { Sha512Round(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0); Sha512Round(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1); Sha512Round(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2); Sha512Round(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3); Sha512Round(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4); Sha512Round(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5); Sha512Round(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6); Sha512Round(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7); } // Feedback for( i=0; i<8; i++ ) { Context->state[i] = Context->state[i] + S[i]; } } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // PUBLIC FUNCTIONS /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Sha512Initialise // // Initialises a SHA512 Context. Use this to initialise/reset a context. /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// void Sha512Initialise ( Sha512Context* Context ) { Context->curlen = 0; Context->length = 0; Context->state[0] = 0x6a09e667f3bcc908ULL; Context->state[1] = 0xbb67ae8584caa73bULL; Context->state[2] = 0x3c6ef372fe94f82bULL; Context->state[3] = 0xa54ff53a5f1d36f1ULL; Context->state[4] = 0x510e527fade682d1ULL; Context->state[5] = 0x9b05688c2b3e6c1fULL; Context->state[6] = 0x1f83d9abfb41bd6bULL; Context->state[7] = 0x5be0cd19137e2179ULL; } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Sha512Update // // Adds data to the SHA512 context. This will process the data and update the internal state of the context. Keep on // calling this function until all the data has been added. Then call Sha512Finalise to calculate the hash. /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// void Sha512Update ( Sha512Context* Context, void* Buffer, uint32_t BufferSize ) { uint32_t n; if( Context->curlen > sizeof(Context->buf) ) { return; } while( BufferSize > 0 ) { if( Context->curlen == 0 && BufferSize >= BLOCK_SIZE ) { TransformFunction( Context, (uint8_t *)Buffer ); Context->length += BLOCK_SIZE * 8; Buffer = (uint8_t*)Buffer + BLOCK_SIZE; BufferSize -= BLOCK_SIZE; } else { n = MIN( BufferSize, (BLOCK_SIZE - Context->curlen) ); __memcpy( Context->buf + Context->curlen, Buffer, (size_t)n ); Context->curlen += n; Buffer = (uint8_t*)Buffer + n; BufferSize -= n; if( Context->curlen == BLOCK_SIZE ) { TransformFunction( Context, Context->buf ); Context->length += 8*BLOCK_SIZE; Context->curlen = 0; } } } } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Sha512Finalise // // Performs the final calculation of the hash and returns the digest (64 byte buffer containing 512bit hash). After // calling this, Sha512Initialised must be used to reuse the context. /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// void Sha512Finalise ( Sha512Context* Context, SHA512_HASH* Digest ) { int i; if( Context->curlen >= sizeof(Context->buf) ) { return; } // Increase the length of the message Context->length += Context->curlen * 8ULL; // Append the '1' bit Context->buf[Context->curlen++] = (uint8_t)0x80; // If the length is currently above 112 bytes we append zeros // then compress. Then we can fall back to padding zeros and length // encoding like normal. if( Context->curlen > 112 ) { while( Context->curlen < 128 ) { Context->buf[Context->curlen++] = (uint8_t)0; } TransformFunction( Context, Context->buf ); Context->curlen = 0; } // Pad up to 120 bytes of zeroes // note: that from 112 to 120 is the 64 MSB of the length. We assume that you won't hash // > 2^64 bits of data... :-) while( Context->curlen < 120 ) { Context->buf[Context->curlen++] = (uint8_t)0; } // Store length STORE64H( Context->length, Context->buf+120 ); TransformFunction( Context, Context->buf ); // Copy output for( i=0; i<8; i++ ) { STORE64H( Context->state[i], Digest->bytes+(8*i) ); } }