45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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#ifdef LTC_BLAKE2SMAC
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/**
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BLAKE2S MAC a block of memory to produce the authentication tag
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@param key The secret key
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@param keylen The length of the secret key (octets)
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@param in The data to BLAKE2S MAC
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@param inlen The length of the data to BLAKE2S MAC (octets)
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@param mac [out] Destination of the authentication tag
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@param maclen [in/out] Max size and resulting size of authentication tag
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@return CRYPT_OK if successful
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*/
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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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{
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blake2smac_state st;
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int err;
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LTC_ARGCHK(key != NULL);
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(mac != NULL);
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LTC_ARGCHK(maclen != NULL);
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if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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if ((err = blake2smac_process(&st, in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
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err = blake2smac_done(&st, mac, maclen);
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LBL_ERR:
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#ifdef LTC_CLEAN_STACK
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zeromem(&st, sizeof(blake2smac_state));
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#endif
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return err;
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}
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#endif
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