40 lines
924 B
C
40 lines
924 B
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
|
|
/* SPDX-License-Identifier: Unlicense */
|
|
|
|
/**
|
|
@file eax_encrypt.c
|
|
EAX implementation, encrypt block by Tom St Denis
|
|
*/
|
|
#include "tomcrypt_private.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
|
|
|