From 418c25a7f08192438e7e72ceb6624b581f601bd4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Niels=20M=C3=B6ller?= Date: Sun, 7 Oct 2001 20:52:01 +0200 Subject: * shadata.c: New file, for generating SHA-256 constants. Rev: src/nettle/shadata.c:1.1 --- shadata.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 shadata.c (limited to 'shadata.c') diff --git a/shadata.c b/shadata.c new file mode 100644 index 00000000..6934b51a --- /dev/null +++ b/shadata.c @@ -0,0 +1,47 @@ + +#include +#include + +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%lxUL, ", (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%lxUL, ", (unsigned long) value); + if (!(i % 4)) + printf("\n"); + } + + return 0; +} -- cgit v1.2.1