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annotate libtomcrypt/src/math/radix_to_bin.c @ 1659:d32bcb5c557d

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Add Ed25519 support (#91) * Add support for Ed25519 as a public key type Ed25519 is a elliptic curve signature scheme that offers better security than ECDSA and DSA and good performance. It may be used for both user and host keys. OpenSSH key import and fuzzer are not supported yet. Initially inspired by Peter Szabo. * Add curve25519 and ed25519 fuzzers * Add import and export of Ed25519 keys
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Wed, 11 Mar 2020 21:09:45 +0500
parents 6dba84798cd5
children
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rev   line source
1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9 #include "tomcrypt.h"
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10
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11 /**
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12 @file radix_to_bin.c
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13 Convert data from a specific radix to binary.
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14 Steffen Jaeckel
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15 */
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16
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17 /**
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18 Convert data from a specific radix to binary
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19
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20 The default MPI descriptors #ltm_desc, #tfm_desc and #gmp_desc
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21 have the following restrictions on parameters:
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22
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23 \p in - NUL-terminated char buffer
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24
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25 \p radix - 2..64
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26
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27 @param in The input
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28 @param radix The radix of the input
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29 @param out The output buffer
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30 @param len [in/out] The length of the output buffer
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31
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32 @return CRYPT_OK on success.
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33 */
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34 int radix_to_bin(const void *in, int radix, void *out, unsigned long *len)
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35 {
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36 unsigned long l;
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37 void* mpi;
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38 int err;
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39
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40 LTC_ARGCHK(in != NULL);
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41 LTC_ARGCHK(len != NULL);
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42
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43 if ((err = mp_init(&mpi)) != CRYPT_OK) return err;
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44 if ((err = mp_read_radix(mpi, in, radix)) != CRYPT_OK) goto LBL_ERR;
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45
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46 if ((l = mp_unsigned_bin_size(mpi)) > *len) {
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47 *len = l;
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48 err = CRYPT_BUFFER_OVERFLOW;
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49 goto LBL_ERR;
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50 }
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51 *len = l;
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52
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53 if ((err = mp_to_unsigned_bin(mpi, out)) != CRYPT_OK) goto LBL_ERR;
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54
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55 LBL_ERR:
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56 mp_clear(mpi);
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57 return err;
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58 }
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59
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60 /* ref: $Format:%D$ */
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61 /* git commit: $Format:%H$ */
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62 /* commit time: $Format:%ai$ */