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nettle
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shadata.c
46 строк
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Niels Möller
Zeropad values in sha256 table.
04 янв 2014, 00:26
04 янв 2014, 00:26
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#include <math.h> #include <stdio.h> static const unsigned primes[64] = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311 }; int main(int argc, char **argv) { int i; static const double third = 1.0/3; printf("SHA-256 constants: \n"); for (i = 0; i < 64; ) { double root = pow(primes[i++], third); double fraction = root - floor(root); double value = floor(ldexp(fraction, 32)); printf("0x%08lxUL, ", (unsigned long) value); if (!(i % 4)) printf("\n"); } printf("\nSHA-256 initial values: \n"); for (i = 0; i < 8; ) { double root = pow(primes[i++], 0.5); double fraction = root - (floor(root)); double value = floor(ldexp(fraction, 32)); printf("0x%08lxUL, ", (unsigned long) value); if (!(i % 4)) printf("\n"); } return 0; }