I'm running into two problems related to the use of the mpz_urandomb
function:
1. I always get the same number.
2. The number is 32 bits instead of 256 bits.
Sample code:
mpz_init(modulus);
mpz_init_set_str(modulus,
"830BD41A71825C6AEAF89AC06FEA5B51E65601E6E1273AC30BE6644F3F80F766B94BC3C2888452C0192B2562E1EC386A7C9B22F92BF597A6694CFB65146A6180BF567357707CBB4F222057266A1891AF416AF4814AEC2F495A4A16D7173857C64BE0FD530D80D98730D7CB5574ACB2FCFA41215A93C1675D17E11EA7743E913B",
16);
mpz_init(exponent_256);
gmp_randinit_default(exponent_seed);
gmp_randseed(exponent_seed, modulus);
mpz_urandomb(exponent_256, exponent_seed, 256);
for(n=0; n<1000; n++)
{
for(k=255; k>=0; k--)
{
...
}
mpz_urandomb(exponent_256, exponent_seed, 256);
}
Any help as to how to fix this would be greatly appreciated.
Adam
--
Dr. Adam J. Elbirt
Director - Information Security Laboratory
Associate Director - Center for Network and Information Security
Assistant Professor
Department of Computer Science
One University Avenue
215 Olsen Hall
Lowell, MA 01854
[EMAIL PROTECTED]
[EMAIL PROTECTED]
978-934-3328 Office
978-934-3551 FAX
http://faculty.uml.edu/aelbirt
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