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annotate libtomcrypt/src/mac/blake2/blake2smac_memory.c @ 1590:68d5d8e84a92

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notes on the fuzzer
author Matt Johnston <matt@ucc.asn.au>
date Mon, 05 Mar 2018 14:07:11 +0800
parents 6dba84798cd5
children
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1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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_BLAKE2SMAC
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13
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14 /**
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15 BLAKE2S MAC a block of memory to produce the authentication tag
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16 @param key The secret key
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17 @param keylen The length of the secret key (octets)
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18 @param in The data to BLAKE2S MAC
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19 @param inlen The length of the data to BLAKE2S MAC (octets)
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20 @param mac [out] Destination of the authentication tag
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21 @param maclen [in/out] Max size and resulting size of authentication tag
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22 @return CRYPT_OK if successful
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23 */
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24 int blake2smac_memory(const unsigned char *key, unsigned long keylen, const unsigned char *in, unsigned long inlen, unsigned char *mac, unsigned long *maclen)
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25 {
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26 blake2smac_state st;
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27 int err;
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28
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29 LTC_ARGCHK(key != NULL);
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30 LTC_ARGCHK(in != NULL);
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31 LTC_ARGCHK(mac != NULL);
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32 LTC_ARGCHK(maclen != NULL);
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33
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34 if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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35 if ((err = blake2smac_process(&st, in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
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36 err = blake2smac_done(&st, mac, maclen);
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37 LBL_ERR:
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38 #ifdef LTC_CLEAN_STACK
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39 zeromem(&st, sizeof(blake2smac_state));
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40 #endif
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41 return err;
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42 }
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43
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44 #endif
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45
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46 /* ref: $Format:%D$ */
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47 /* git commit: $Format:%H$ */
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48 /* commit time: $Format:%ai$ */