Codebase list libcryptx-perl / 8323af68-2536-4ad9-bc15-e0eea4d995f7/main src / ltm / bn_mp_jacobi.c
8323af68-2536-4ad9-bc15-e0eea4d995f7/main

Tree @8323af68-2536-4ad9-bc15-e0eea4d995f7/main (Download .tar.gz)

bn_mp_jacobi.c @8323af68-2536-4ad9-bc15-e0eea4d995f7/main — raw · history · blame 

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#include "tommath_private.h"
#ifdef BN_MP_JACOBI_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.
 *
 * SPDX-License-Identifier: Unlicense
 */

/* computes the jacobi c = (a | n) (or Legendre if n is prime)
 * Kept for legacy reasons, please use mp_kronecker() instead
 */
int mp_jacobi(const mp_int *a, const mp_int *n, int *c)
{
   /* if a < 0 return MP_VAL */
   if (mp_isneg(a) == MP_YES) {
      return MP_VAL;
   }

   /* if n <= 0 return MP_VAL */
   if (mp_cmp_d(n, 0uL) != MP_GT) {
      return MP_VAL;
   }

   return mp_kronecker(a, n, c);
}
#endif

/* ref:         $Format:%D$ */
/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */