57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt_private.h"
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#ifdef LTC_BLAKE2SMAC
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/**
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Initialize an BLAKE2S MAC context.
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@param st The BLAKE2S MAC state
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@param outlen The size of the MAC output (octets)
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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 blake2smac_init(blake2smac_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 blake2s_init(st, outlen, key, keylen);
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}
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/**
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Process data through BLAKE2S MAC
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@param st The BLAKE2S 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 blake2smac_process(blake2smac_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 blake2s_process(st, in, inlen);
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}
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/**
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Terminate a BLAKE2S MAC session
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@param st The BLAKE2S MAC state
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@param mac [out] The destination of the BLAKE2S MAC authentication tag
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@param maclen [in/out] The max size and resulting size of the BLAKE2S MAC authentication tag
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@return CRYPT_OK if successful
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*/
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int blake2smac_done(blake2smac_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->blake2s.outlen);
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*maclen = st->blake2s.outlen;
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return blake2s_done(st, mac);
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}
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#endif
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