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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://libtom.org
*/
/**
@file eax_encrypt.c
EAX implementation, encrypt block by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef LTC_EAX_MODE
/**
Encrypt with EAX a block of data.
@param eax The EAX state
@param pt The plaintext to encrypt
@param ct [out] The ciphertext as encrypted
@param length The length of the plaintext (octets)
@return CRYPT_OK if successful
*/
int eax_encrypt(eax_state *eax, const unsigned char *pt, unsigned char *ct,
unsigned long length)
{
int err;
LTC_ARGCHK(eax != NULL);
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
/* encrypt */
if ((err = ctr_encrypt(pt, ct, length, &eax->ctr)) != CRYPT_OK) {
return err;
}
/* omac ciphertext */
return omac_process(&eax->ctomac, ct, length);
}
#endif
/* $Source$ */
/* $Revision$ */
/* $Date$ */
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