/* 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 $ */