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comparison libtommath/bn_mp_to_unsigned_bin.c @ 1436:60fc6476e044

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Update to libtommath v1.0
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 22:37:14 +0800
parents 5ff8218bcee9
children 8bba51a55704
comparison
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1435:f849a5ca2efc 1436:60fc6476e044
1 #include <tommath.h> 1 #include <tommath_private.h>
2 #ifdef BN_MP_TO_UNSIGNED_BIN_C 2 #ifdef BN_MP_TO_UNSIGNED_BIN_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
4 * 4 *
5 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
10 * additional optimizations in place. 10 * additional optimizations in place.
11 * 11 *
12 * The library is free for all purposes without any express 12 * The library is free for all purposes without any express
13 * guarantee it works. 13 * guarantee it works.
14 * 14 *
15 * Tom St Denis, [email protected], http://math.libtomcrypt.com 15 * Tom St Denis, [email protected], http://libtom.org
16 */ 16 */
17 17
18 /* store in unsigned [big endian] format */ 18 /* store in unsigned [big endian] format */
19 int mp_to_unsigned_bin (mp_int * a, unsigned char *b) 19 int mp_to_unsigned_bin (mp_int * a, unsigned char *b)
20 { 20 {
24 if ((res = mp_init_copy (&t, a)) != MP_OKAY) { 24 if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
25 return res; 25 return res;
26 } 26 }
27 27
28 x = 0; 28 x = 0;
29 while (mp_iszero (&t) == 0) { 29 while (mp_iszero (&t) == MP_NO) {
30 #ifndef MP_8BIT 30 #ifndef MP_8BIT
31 b[x++] = (unsigned char) (t.dp[0] & 255); 31 b[x++] = (unsigned char) (t.dp[0] & 255);
32 #else 32 #else
33 b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7)); 33 b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7));
34 #endif 34 #endif
41 mp_clear (&t); 41 mp_clear (&t);
42 return MP_OKAY; 42 return MP_OKAY;
43 } 43 }
44 #endif 44 #endif
45 45
46 /* $Source: /cvs/libtom/libtommath/bn_mp_to_unsigned_bin.c,v $ */ 46 /* $Source$ */
47 /* $Revision: 1.3 $ */ 47 /* $Revision$ */
48 /* $Date: 2006/03/31 14:18:44 $ */ 48 /* $Date$ */