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63 lines
1.9 KiB
63 lines
1.9 KiB
/* 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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#include <stdarg.h>
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#ifdef LTC_BLAKE2SMAC
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/**
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BLAKE2S MAC multiple blocks 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 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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@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 ... tuples of (data,len) pairs to BLAKE2S MAC, terminated with a (NULL,x) (x=don't care)
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@return CRYPT_OK if successful
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*/
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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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{
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blake2smac_state st;
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int err;
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va_list args;
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const unsigned char *curptr;
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unsigned long curlen;
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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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va_start(args, inlen);
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curptr = in;
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curlen = inlen;
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if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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for (;;) {
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if ((err = blake2smac_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; }
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curptr = va_arg(args, const unsigned char*);
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if (curptr == NULL) break;
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curlen = va_arg(args, unsigned long);
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}
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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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va_end(args);
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return err;
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}
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#endif
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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