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comparison libtomcrypt/src/math/radix_to_bin.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
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1470:8bba51a55704 1471:6dba84798cd5
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 */
9 #include "tomcrypt.h"
10
11 /**
12 @file radix_to_bin.c
13 Convert data from a specific radix to binary.
14 Steffen Jaeckel
15 */
16
17 /**
18 Convert data from a specific radix to binary
19
20 The default MPI descriptors #ltm_desc, #tfm_desc and #gmp_desc
21 have the following restrictions on parameters:
22
23 \p in - NUL-terminated char buffer
24
25 \p radix - 2..64
26
27 @param in The input
28 @param radix The radix of the input
29 @param out The output buffer
30 @param len [in/out] The length of the output buffer
31
32 @return CRYPT_OK on success.
33 */
34 int radix_to_bin(const void *in, int radix, void *out, unsigned long *len)
35 {
36 unsigned long l;
37 void* mpi;
38 int err;
39
40 LTC_ARGCHK(in != NULL);
41 LTC_ARGCHK(len != NULL);
42
43 if ((err = mp_init(&mpi)) != CRYPT_OK) return err;
44 if ((err = mp_read_radix(mpi, in, radix)) != CRYPT_OK) goto LBL_ERR;
45
46 if ((l = mp_unsigned_bin_size(mpi)) > *len) {
47 *len = l;
48 err = CRYPT_BUFFER_OVERFLOW;
49 goto LBL_ERR;
50 }
51 *len = l;
52
53 if ((err = mp_to_unsigned_bin(mpi, out)) != CRYPT_OK) goto LBL_ERR;
54
55 LBL_ERR:
56 mp_clear(mpi);
57 return err;
58 }
59
60 /* ref: $Format:%D$ */
61 /* git commit: $Format:%H$ */
62 /* commit time: $Format:%ai$ */