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annotate libtomcrypt/src/mac/blake2/blake2bmac.c @ 1505:55120acb9994

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Add Spectre v2 mitigations for GCC (#54)
author Loganaden Velvindron <logan@hackers.mu>
date Fri, 16 Feb 2018 19:35:32 +0400
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
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10 #include "tomcrypt.h"
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11
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12 #ifdef LTC_BLAKE2BMAC
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13
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14 /**
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15 Initialize an BLAKE2B MAC context.
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16 @param st The BLAKE2B MAC state
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17 @param outlen The size of the MAC output (octets)
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18 @param key The secret key
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19 @param keylen The length of the secret key (octets)
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20 @return CRYPT_OK if successful
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21 */
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22 int blake2bmac_init(blake2bmac_state *st, unsigned long outlen, const unsigned char *key, unsigned long keylen)
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23 {
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24 LTC_ARGCHK(st != NULL);
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25 LTC_ARGCHK(key != NULL);
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26 return blake2b_init(st, outlen, key, keylen);
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27 }
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28
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29 /**
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30 Process data through BLAKE2B MAC
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31 @param st The BLAKE2B MAC state
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32 @param in The data to send through HMAC
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33 @param inlen The length of the data to HMAC (octets)
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34 @return CRYPT_OK if successful
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35 */
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36 int blake2bmac_process(blake2bmac_state *st, const unsigned char *in, unsigned long inlen)
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37 {
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38 if (inlen == 0) return CRYPT_OK; /* nothing to do */
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39 LTC_ARGCHK(st != NULL);
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40 LTC_ARGCHK(in != NULL);
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41 return blake2b_process(st, in, inlen);
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42 }
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43
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44 /**
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45 Terminate a BLAKE2B MAC session
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46 @param st The BLAKE2B MAC state
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47 @param mac [out] The destination of the BLAKE2B MAC authentication tag
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48 @param maclen [in/out] The max size and resulting size of the BLAKE2B MAC authentication tag
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49 @return CRYPT_OK if successful
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50 */
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51 int blake2bmac_done(blake2bmac_state *st, unsigned char *mac, unsigned long *maclen)
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52 {
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53 LTC_ARGCHK(st != NULL);
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54 LTC_ARGCHK(mac != NULL);
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55 LTC_ARGCHK(maclen != NULL);
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56 LTC_ARGCHK(*maclen >= st->blake2b.outlen);
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57
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58 *maclen = st->blake2b.outlen;
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59 return blake2b_done(st, mac);
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60 }
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61
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62 #endif
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63
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64 /* ref: $Format:%D$ */
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65 /* git commit: $Format:%H$ */
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66 /* commit time: $Format:%ai$ */