Mercurial > dropbear
annotate libtomcrypt/src/mac/blake2/blake2smac_memory_multi.c @ 1487:b0c3b46372dc
simplify error handling, check mp_copy return value
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 10 Feb 2018 19:25:00 +0800 |
parents | 6dba84798cd5 |
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rev | line source |
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1471
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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 #include <stdarg.h> |
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12 |
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13 #ifdef LTC_BLAKE2SMAC |
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14 |
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15 /** |
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16 BLAKE2S MAC multiple blocks of memory to produce the authentication tag |
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17 @param key The secret key |
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18 @param keylen The length of the secret key (octets) |
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19 @param mac [out] Destination of the authentication tag |
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20 @param maclen [in/out] Max size and resulting size of authentication tag |
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21 @param in The data to BLAKE2S MAC |
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22 @param inlen The length of the data to BLAKE2S MAC (octets) |
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23 @param ... tuples of (data,len) pairs to BLAKE2S MAC, terminated with a (NULL,x) (x=don't care) |
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24 @return CRYPT_OK if successful |
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25 */ |
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26 int blake2smac_memory_multi(const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen, const unsigned char *in, unsigned long inlen, ...) |
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27 { |
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28 blake2smac_state st; |
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29 int err; |
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30 va_list args; |
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31 const unsigned char *curptr; |
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32 unsigned long curlen; |
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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 va_start(args, inlen); |
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40 curptr = in; |
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41 curlen = inlen; |
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42 if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } |
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43 for (;;) { |
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44 if ((err = blake2smac_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; } |
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45 curptr = va_arg(args, const unsigned char*); |
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46 if (curptr == NULL) break; |
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47 curlen = va_arg(args, unsigned long); |
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48 } |
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49 err = blake2smac_done(&st, mac, maclen); |
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50 LBL_ERR: |
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51 #ifdef LTC_CLEAN_STACK |
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52 zeromem(&st, sizeof(blake2smac_state)); |
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53 #endif |
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54 va_end(args); |
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55 return err; |
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56 } |
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57 |
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58 #endif |
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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: $Format:%ai$ */ |