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sha512.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "rotate.h"
#include "sha512.h"
char* sha512 ( char* input ) {
// Initializes hash values
unsigned long long int h[8] = {
0x6a09e667f3bcc908,
0xbb67ae8584caa73b,
0x3c6ef372fe94f82b,
0xa54ff53a5f1d36f1,
0x510e527fade682d1,
0x9b05688c2b3e6c1f,
0x1f83d9abfb41bd6b,
0x5be0cd19137e2179
};
// Initializes constants
unsigned long long int k[128] = {
0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, 0x3956c25bf348b538,
0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, 0x12835b0145706fbe,
0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235,
0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65,
0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, 0x983e5152ee66dfab,
0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725,
0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed,
0x53380d139d95b3df, 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b,
0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218,
0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8, 0x1e376c085141ab53,
0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373,
0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec,
0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b, 0xca273eceea26619c,
0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, 0x0a637dc5a2c898a6,
0x113f9804bef90dae, 0x1b710b35131c471b, 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc,
0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817
};
// Padds the input (pre-processing)
unsigned char padding[( (int) ceil ( ( (float) strlen ( input ) + 17.0 ) / 128.0 ) * 128 )];
for ( unsigned int x = 0; x < sizeof ( padding ); x++ ) {
if ( x < strlen ( input ) ) {
padding[x] = input[x];
} else if ( x == strlen ( input ) ) {
padding[x] = 0x80;
} else {
padding[x] = 0x00;
}
}
// Append a 64-bit big endian int which represents the length of the input in bits
unsigned long long int length = strlen ( input ) * 8;
padding[sizeof ( padding ) - 8] = ( length >> 56 ) & 0xFF;
padding[sizeof ( padding ) - 7] = ( length >> 48 ) & 0xFF;
padding[sizeof ( padding ) - 6] = ( length >> 40 ) & 0xFF;
padding[sizeof ( padding ) - 5] = ( length >> 32 ) & 0xFF;
padding[sizeof ( padding ) - 4] = ( length >> 24 ) & 0xFF;
padding[sizeof ( padding ) - 3] = ( length >> 16 ) & 0xFF;
padding[sizeof ( padding ) - 2] = ( length >> 8 ) & 0xFF;
padding[sizeof ( padding ) - 1] = ( length >> 0 ) & 0xFF;
for ( unsigned int x = 0; x < sizeof ( padding ); x += 128 ) {
// Splits the padding into 64 byte chunks
char chunk[128] = {
padding[x], padding[ x + 1], padding[ x + 2], padding[ x + 3], padding[ x + 4], padding[ x + 5 ],
padding[ x + 6], padding[ x + 7], padding[ x + 8], padding[ x + 9], padding[ x + 10], padding[ x + 11],
padding[ x + 12], padding[ x + 13], padding[ x + 14], padding[ x + 15], padding[ x + 16], padding[ x + 17],
padding[ x + 18], padding[ x + 19], padding[ x + 20], padding[ x + 21], padding[ x + 22], padding[ x + 23],
padding[ x + 24], padding[ x + 25], padding[ x + 26], padding[ x + 27], padding[ x + 28], padding[ x + 29],
padding[ x + 30], padding[ x + 31], padding[ x + 32], padding[ x + 33], padding[ x + 34], padding[ x + 35],
padding[ x + 36], padding[ x + 37], padding[ x + 38], padding[ x + 39], padding[ x + 40], padding[ x + 41],
padding[ x + 42], padding[ x + 43], padding[ x + 44], padding[ x + 45], padding[ x + 46], padding[ x + 47],
padding[ x + 48], padding[ x + 49], padding[ x + 50], padding[ x + 51], padding[ x + 52], padding[ x + 53],
padding[ x + 54], padding[ x + 55], padding[ x + 56], padding[ x + 57], padding[ x + 58], padding[ x + 59],
padding[ x + 60], padding[ x + 61], padding[ x + 62], padding[ x + 63], padding[ x + 64], padding[ x + 65],
padding[ x + 66], padding[ x + 67], padding[ x + 68], padding[ x + 69], padding[ x + 70], padding[ x + 71],
padding[ x + 72], padding[ x + 73], padding[ x + 74], padding[ x + 75], padding[ x + 76], padding[ x + 77],
padding[ x + 78], padding[ x + 79], padding[ x + 80], padding[ x + 81], padding[ x + 82], padding[ x + 83],
padding[ x + 84], padding[ x + 85], padding[ x + 86], padding[ x + 87], padding[ x + 88], padding[ x + 89],
padding[ x + 90], padding[ x + 91], padding[ x + 92], padding[ x + 93], padding[ x + 94], padding[ x + 95],
padding[ x + 96], padding[ x + 97], padding[ x + 98], padding[ x + 99], padding[ x + 100], padding[ x + 101],
padding[ x + 102], padding[ x + 103], padding[ x + 104], padding[ x + 105], padding[ x + 106], padding[ x + 107],
padding[ x + 108], padding[ x + 109], padding[ x + 110], padding[ x + 111], padding[ x + 112], padding[ x + 113],
padding[ x + 114], padding[ x + 115], padding[ x + 116], padding[ x + 117], padding[ x + 118], padding[ x + 119],
padding[ x + 120], padding[ x + 121], padding[ x + 122], padding[ x + 123], padding[ x + 124], padding[ x + 125],
padding[ x + 126], padding[ x + 127]
};
// Copies chunk into first 16 words of the message schedule
unsigned long long int w[80] = {0};
for ( unsigned int y = 0; y < sizeof ( chunk ); y += 8 ) {
unsigned char word[8] = { chunk[y + 7], chunk[y + 6], chunk[y + 5], chunk[y + 4], chunk[y + 3], chunk[y + 2], chunk[y + 1], chunk[y] };
w[y / 8] = ( ( ( ( ( ( ( w[y / 8] << 8 | word[7] ) << 8 | word[6] ) << 8 | word[5] ) << 8 | word[4] ) << 8 | word[3] ) << 8 | word[2] ) << 8 | word[1] ) << 8 | word[0];
}
// Main schedule extension loop
for ( int y = 16; y < 80; y++ ) {
unsigned long long int s0 = ( long_right_rotate ( w[y - 15], 1 ) ^
long_right_rotate ( w[y - 15], 8) ^
( w[y - 15] >> 7 ) );
unsigned long long int s1 = ( long_right_rotate ( w[y - 2], 19 ) ^
long_right_rotate ( w[y - 2], 61 ) ^
( w[y - 2] >> 6 ) );
w[y] = ( w[y - 16] + s0 + w[y - 7] + s1 ) % 18446744073709551615ULL;
}
unsigned long long int a = h[0];
unsigned long long int b = h[1];
unsigned long long int c = h[2];
unsigned long long int d = h[3];
unsigned long long int e = h[4];
unsigned long long int f = h[5];
unsigned long long int g = h[6];
unsigned long long int _h = h[7];
// Main compression loop
for ( int y = 0; y < 80; y++ ) {
unsigned long long int S1 = long_right_rotate ( e, 14 ) ^
long_right_rotate ( e, 18 ) ^
long_right_rotate ( e, 41 );
unsigned long long int ch = ( e & f ) ^ ( ( ~e ) & g );
unsigned long long int temp1 = ( _h + S1 + ch + k[y] + w[y] ) % 18446744073709551615ULL;
unsigned long long int S0 = long_right_rotate ( a, 28 ) ^
long_right_rotate ( a, 34 ) ^
long_right_rotate ( a, 39 );
unsigned long long int maj = ( a & b ) ^ ( a & c ) ^ ( b & c );
unsigned long long int temp2 = ( S0 + maj ) % 18446744073709551615ULL;
_h = g;
g = f;
f = e;
e = ( d + temp1 ) % 18446744073709551615ULL;
d = c;
c = b;
b = a;
a = ( temp1 + temp2 ) % 18446744073709551615ULL;
}
// Add the compressed chunk to the current hash value
h[0] += a;
h[1] += b;
h[2] += c;
h[3] += d;
h[4] += e;
h[5] += f;
h[6] += g;
h[7] += _h;
}
char* output = malloc ( sizeof ( unsigned long long int ) * 64 );
sprintf ( output, "%016llX%016llX%016llX%016llX%016llX%016llX%016llX%016llX", h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7] );
return output;
}