Line data    Source code

       1             : #include "tommath_private.h"
       2             : #ifdef BN_MP_TO_SBIN_C
       3             : /* LibTomMath, multiple-precision integer library -- Tom St Denis */
       4             : /* SPDX-License-Identifier: Unlicense */
       5             : 
       6             : /* store in signed [big endian] format */
       7           0 : mp_err mp_to_sbin(const mp_int *a, unsigned char *buf, size_t maxlen, size_t *written)
       8             : {
       9             :    mp_err err;
      10           0 :    if (maxlen == 0u) {
      11           0 :       return MP_BUF;
      12             :    }
      13           0 :    if ((err = mp_to_ubin(a, buf + 1, maxlen - 1u, written)) != MP_OKAY) {
      14           0 :       return err;
      15             :    }
      16           0 :    if (written != NULL) {
      17           0 :       (*written)++;
      18             :    }
      19           0 :    buf[0] = (a->sign == MP_ZPOS) ? (unsigned char)0 : (unsigned char)1;
      20           0 :    return MP_OKAY;
      21             : }
      22             : #endif