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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/
#include "tomcrypt.h"
#ifdef LTC_BLAKE2SMAC
/**
Initialize an BLAKE2S MAC context.
@param st The BLAKE2S MAC state
@param outlen The size of the MAC output (octets)
@param key The secret key
@param keylen The length of the secret key (octets)
@return CRYPT_OK if successful
*/
int blake2smac_init(blake2smac_state *st, unsigned long outlen, const unsigned char *key, unsigned long keylen)
{
LTC_ARGCHK(st != NULL);
LTC_ARGCHK(key != NULL);
return blake2s_init(st, outlen, key, keylen);
}
/**
Process data through BLAKE2S MAC
@param st The BLAKE2S MAC state
@param in The data to send through HMAC
@param inlen The length of the data to HMAC (octets)
@return CRYPT_OK if successful
*/
int blake2smac_process(blake2smac_state *st, const unsigned char *in, unsigned long inlen)
{
if (inlen == 0) return CRYPT_OK; /* nothing to do */
LTC_ARGCHK(st != NULL);
LTC_ARGCHK(in != NULL);
return blake2s_process(st, in, inlen);
}
/**
Terminate a BLAKE2S MAC session
@param st The BLAKE2S MAC state
@param mac [out] The destination of the BLAKE2S MAC authentication tag
@param maclen [in/out] The max size and resulting size of the BLAKE2S MAC authentication tag
@return CRYPT_OK if successful
*/
int blake2smac_done(blake2smac_state *st, unsigned char *mac, unsigned long *maclen)
{
LTC_ARGCHK(st != NULL);
LTC_ARGCHK(mac != NULL);
LTC_ARGCHK(maclen != NULL);
LTC_ARGCHK(*maclen >= st->blake2s.outlen);
*maclen = st->blake2s.outlen;
return blake2s_done(st, mac);
}
#endif
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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