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annotate libtomcrypt/src/mac/poly1305/poly1305_memory.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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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 /* The implementation is based on:
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11 * Public Domain poly1305 from Andrew Moon
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12 * https://github.com/floodyberry/poly1305-donna
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13 */
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14
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15 #include "tomcrypt.h"
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16
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17 #ifdef LTC_POLY1305
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18
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19 /**
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20 POLY1305 a block of memory to produce the authentication tag
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21 @param key The secret key
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22 @param keylen The length of the secret key (octets)
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23 @param in The data to POLY1305
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24 @param inlen The length of the data to POLY1305 (octets)
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25 @param mac [out] Destination of the authentication tag
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26 @param maclen [in/out] Max size and resulting size of authentication tag
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27 @return CRYPT_OK if successful
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28 */
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29 int poly1305_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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30 {
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31 poly1305_state st;
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32 int err;
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33
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34 LTC_ARGCHK(key != NULL);
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35 LTC_ARGCHK(in != NULL);
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36 LTC_ARGCHK(mac != NULL);
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37 LTC_ARGCHK(maclen != NULL);
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38
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39 if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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40 if ((err = poly1305_process(&st, in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
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41 err = poly1305_done(&st, mac, maclen);
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42 LBL_ERR:
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43 #ifdef LTC_CLEAN_STACK
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44 zeromem(&st, sizeof(poly1305_state));
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45 #endif
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46 return err;
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47 }
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48
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49 #endif
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50
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51 /* ref: $Format:%D$ */
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52 /* git commit: $Format:%H$ */
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53 /* commit time: $Format:%ai$ */