#include <tommath.h>#ifdef BN_MP_TO_UNSIGNED_BIN_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@iahu.ca, http://math.libtomcrypt.org *//* store in unsigned [big endian] format */intmp_to_unsigned_bin (mp_int * a, unsigned char *b){  int     x, res;  mp_int  t;  if ((res = mp_init_copy (&t, a)) != MP_OKAY) {    return res;  }  x = 0;  while (mp_iszero (&t) == 0) {#ifndef MP_8BIT      b[x++] = (unsigned char) (t.dp[0] & 255);#else      b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7));#endif    if ((res = mp_div_2d (&t, 8, &t, NULL)) != MP_OKAY) {      mp_clear (&t);      return res;    }  }  bn_reverse (b, x);  mp_clear (&t);  return MP_OKAY;}#endif