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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.
*
* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
*/
#include "tomcrypt.h"
/**
@file xcbc_process.c
XCBC Support, XCBC-MAC a block of memory
*/
#ifdef LTC_XCBC
/** XCBC-MAC a block of memory
@param cipher Index of cipher to use
@param key [in] Secret key
@param keylen Length of key in octets
@param in [in] Message to MAC
@param inlen Length of input in octets
@param out [out] Destination for the MAC tag
@param outlen [in/out] Output size and final tag size
Return CRYPT_OK on success.
*/
int xcbc_memory(int cipher,
const unsigned char *key, unsigned long keylen,
const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen)
{
xcbc_state *xcbc;
int err;
/* is the cipher valid? */
if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
return err;
}
/* Use accelerator if found */
if (cipher_descriptor[cipher].xcbc_memory != NULL) {
return cipher_descriptor[cipher].xcbc_memory(key, keylen, in, inlen, out, outlen);
}
xcbc = XCALLOC(1, sizeof(*xcbc));
if (xcbc == NULL) {
return CRYPT_MEM;
}
if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) {
goto done;
}
if ((err = xcbc_process(xcbc, in, inlen)) != CRYPT_OK) {
goto done;
}
err = xcbc_done(xcbc, out, outlen);
done:
XFREE(xcbc);
return err;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory.c,v $ */
/* $Revision: 1.4 $ */
/* $Date: 2006/11/21 23:02:42 $ */
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