62 lines
1.8 KiB
C
62 lines
1.8 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_BLAKE2BMAC
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/**
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Initialize an BLAKE2B MAC context.
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@param st The BLAKE2B MAC state
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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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@return CRYPT_OK if successful
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*/
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int blake2bmac_init(blake2bmac_state *st, unsigned long outlen, const unsigned char *key, unsigned long keylen)
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{
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LTC_ARGCHK(st != NULL);
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LTC_ARGCHK(key != NULL);
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return blake2b_init(st, outlen, key, keylen);
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}
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/**
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Process data through BLAKE2B MAC
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@param st The BLAKE2B MAC state
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@param in The data to send through HMAC
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@param inlen The length of the data to HMAC (octets)
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@return CRYPT_OK if successful
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*/
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int blake2bmac_process(blake2bmac_state *st, const unsigned char *in, unsigned long inlen)
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{
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if (inlen == 0) return CRYPT_OK; /* nothing to do */
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LTC_ARGCHK(st != NULL);
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LTC_ARGCHK(in != NULL);
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return blake2b_process(st, in, inlen);
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}
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/**
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Terminate a BLAKE2B MAC session
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@param st The BLAKE2B MAC state
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@param mac [out] The destination of the BLAKE2B MAC authentication tag
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@param maclen [in/out] The max size and resulting size of the BLAKE2B MAC authentication tag
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@return CRYPT_OK if successful
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*/
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int blake2bmac_done(blake2bmac_state *st, unsigned char *mac, unsigned long *maclen)
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{
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LTC_ARGCHK(st != NULL);
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LTC_ARGCHK(mac != NULL);
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LTC_ARGCHK(maclen != NULL);
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LTC_ARGCHK(*maclen >= st->blake2b.outlen);
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*maclen = st->blake2b.outlen;
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return blake2b_done(st, mac);
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}
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#endif
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