mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-30 11:18:12 +00:00
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#include "tommath_private.h"
|
|
#ifdef BN_MP_PRIME_RABIN_MILLER_TRIALS_C
|
|
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
|
|
/* SPDX-License-Identifier: Unlicense */
|
|
|
|
static const struct {
|
|
int k, t;
|
|
} sizes[] = {
|
|
{ 80, -1 }, /* Use deterministic algorithm for size <= 80 bits */
|
|
{ 81, 37 }, /* max. error = 2^(-96)*/
|
|
{ 96, 32 }, /* max. error = 2^(-96)*/
|
|
{ 128, 40 }, /* max. error = 2^(-112)*/
|
|
{ 160, 35 }, /* max. error = 2^(-112)*/
|
|
{ 256, 27 }, /* max. error = 2^(-128)*/
|
|
{ 384, 16 }, /* max. error = 2^(-128)*/
|
|
{ 512, 18 }, /* max. error = 2^(-160)*/
|
|
{ 768, 11 }, /* max. error = 2^(-160)*/
|
|
{ 896, 10 }, /* max. error = 2^(-160)*/
|
|
{ 1024, 12 }, /* max. error = 2^(-192)*/
|
|
{ 1536, 8 }, /* max. error = 2^(-192)*/
|
|
{ 2048, 6 }, /* max. error = 2^(-192)*/
|
|
{ 3072, 4 }, /* max. error = 2^(-192)*/
|
|
{ 4096, 5 }, /* max. error = 2^(-256)*/
|
|
{ 5120, 4 }, /* max. error = 2^(-256)*/
|
|
{ 6144, 4 }, /* max. error = 2^(-256)*/
|
|
{ 8192, 3 }, /* max. error = 2^(-256)*/
|
|
{ 9216, 3 }, /* max. error = 2^(-256)*/
|
|
{ 10240, 2 } /* For bigger keysizes use always at least 2 Rounds */
|
|
};
|
|
|
|
/* returns # of RM trials required for a given bit size */
|
|
int mp_prime_rabin_miller_trials(int size)
|
|
{
|
|
int x;
|
|
|
|
for (x = 0; x < (int)(sizeof(sizes)/(sizeof(sizes[0]))); x++) {
|
|
if (sizes[x].k == size) {
|
|
return sizes[x].t;
|
|
} else if (sizes[x].k > size) {
|
|
return (x == 0) ? sizes[0].t : sizes[x - 1].t;
|
|
}
|
|
}
|
|
return sizes[x-1].t;
|
|
}
|
|
|
|
|
|
#endif
|