1#include <tommath.h>
2#ifdef BN_MP_TO_UNSIGNED_BIN_C
3/* LibTomMath, multiple-precision integer library -- Tom St Denis
4 *
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
7 *
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
11 *
12 * The library is free for all purposes without any express
13 * guarantee it works.
14 *
15 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
16 */
17
18/* store in unsigned [big endian] format */
19int mp_to_unsigned_bin (mp_int * a, unsigned char *b)
20{
21  int     x, res;
22  mp_int  t;
23
24  if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
25    return res;
26  }
27
28  x = 0;
29  while (mp_iszero (&t) == 0) {
30#ifndef MP_8BIT
31      b[x++] = (unsigned char) (t.dp[0] & 255);
32#else
33      b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7));
34#endif
35    if ((res = mp_div_2d (&t, 8, &t, NULL)) != MP_OKAY) {
36      mp_clear (&t);
37      return res;
38    }
39  }
40  bn_reverse (b, x);
41  mp_clear (&t);
42  return MP_OKAY;
43}
44#endif
45
46/* $Source$ */
47/* $Revision$ */
48/* $Date$ */
49