kc3-lang/libtommath/bn_mp_submod.c

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• Hash : ff561404
  Author :
  Date : 2019-04-07T15:29:11
  

  shorter headers

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• bn_mp_submod.c

• #include "tommath_private.h"
  #ifdef BN_MP_SUBMOD_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* d = a - b (mod c) */
  int mp_submod(const mp_int *a, const mp_int *b, const mp_int *c, mp_int *d)
  {
     int     res;
     mp_int  t;
  
  
     if ((res = mp_init(&t)) != MP_OKAY) {
        return res;
     }
  
     if ((res = mp_sub(a, b, &t)) != MP_OKAY) {
        mp_clear(&t);
        return res;
     }
     res = mp_mod(&t, c, d);
     mp_clear(&t);
     return res;
  }
  #endif
  

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