63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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/* 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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/**
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@file pmac_memory.c
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PMAC implementation, process a block of memory, by Tom St Denis
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*/
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#ifdef LTC_PMAC
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/**
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PMAC a block of memory
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@param cipher The index of the cipher desired
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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 you wish to send through PMAC
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@param inlen The length of data you wish to send through PMAC (octets)
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@param out [out] Destination for the authentication tag
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@param outlen [in/out] The max size and resulting size of the authentication tag
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@return CRYPT_OK if successful
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*/
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int pmac_memory(int cipher,
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const unsigned char *key, unsigned long keylen,
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const unsigned char *in, unsigned long inlen,
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unsigned char *out, unsigned long *outlen)
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{
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int err;
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pmac_state *pmac;
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LTC_ARGCHK(key != NULL);
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(out != NULL);
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LTC_ARGCHK(outlen != NULL);
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/* allocate ram for pmac state */
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pmac = XMALLOC(sizeof(pmac_state));
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if (pmac == NULL) {
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return CRYPT_MEM;
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}
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if ((err = pmac_init(pmac, cipher, key, keylen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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if ((err = pmac_process(pmac, in, inlen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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if ((err = pmac_done(pmac, out, outlen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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err = CRYPT_OK;
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LBL_ERR:
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#ifdef LTC_CLEAN_STACK
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zeromem(pmac, sizeof(pmac_state));
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#endif
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XFREE(pmac);
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return err;
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}
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#endif
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