mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-30 19:28:10 +00:00
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#include <tommath.h>
|
|
#ifdef BN_MP_SET_INT_C
|
|
/* LibTomMath, multiple-precision integer library -- Tom St Denis
|
|
*
|
|
* LibTomMath is a library that provides multiple-precision
|
|
* integer arithmetic as well as number theoretic functionality.
|
|
*
|
|
* The library was designed directly after the MPI library by
|
|
* Michael Fromberger but has been written from scratch with
|
|
* additional optimizations in place.
|
|
*
|
|
* The library is free for all purposes without any express
|
|
* guarantee it works.
|
|
*
|
|
* Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
|
|
*/
|
|
|
|
/* set a 32-bit const */
|
|
int mp_set_int (mp_int * a, unsigned long b)
|
|
{
|
|
int x, res;
|
|
|
|
mp_zero (a);
|
|
|
|
/* set four bits at a time */
|
|
for (x = 0; x < 8; x++) {
|
|
/* shift the number up four bits */
|
|
if ((res = mp_mul_2d (a, 4, a)) != MP_OKAY) {
|
|
return res;
|
|
}
|
|
|
|
/* OR in the top four bits of the source */
|
|
a->dp[0] |= (b >> 28) & 15;
|
|
|
|
/* shift the source up to the next four bits */
|
|
b <<= 4;
|
|
|
|
/* ensure that digits are not clamped off */
|
|
a->used += 1;
|
|
}
|
|
mp_clamp (a);
|
|
return MP_OKAY;
|
|
}
|
|
#endif
|
|
|
|
/* $Source: /cvs/libtom/libtommath/bn_mp_set_int.c,v $ */
|
|
/* $Revision: 1.3 $ */
|
|
/* $Date: 2006/03/31 14:18:44 $ */
|