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annotate libtomcrypt/src/pk/dh/dh_export_key.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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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
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10 #include "tomcrypt.h"
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11
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12 #ifdef LTC_MDH
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13
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14 /**
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15 Binary export a DH key to a buffer
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16 @param out [out] The destination for the key
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17 @param outlen [in/out] The max size and resulting size of the DH key
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18 @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
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19 @param key The key you wish to export
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20 @return CRYPT_OK if successful
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21 */
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22 int dh_export_key(void *out, unsigned long *outlen, int type, dh_key *key)
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23 {
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24 unsigned long len;
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25 void *k;
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26
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27 LTC_ARGCHK(out != NULL);
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28 LTC_ARGCHK(outlen != NULL);
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29 LTC_ARGCHK(key != NULL);
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30
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31 k = (type == PK_PRIVATE) ? key->x : key->y;
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32 len = mp_unsigned_bin_size(k);
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33
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34 if (*outlen < len) {
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35 *outlen = len;
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36 return CRYPT_BUFFER_OVERFLOW;
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37 }
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38 *outlen = len;
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39
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40 return mp_to_unsigned_bin(k, out);
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41 }
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42
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43 #endif /* LTC_MDH */
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44
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45 /* ref: $Format:%D$ */
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46 /* git commit: $Format:%H$ */
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47 /* commit time: $Format:%ai$ */