#include "tomcrypt.h"
#ifdef LTC_ECB_MODE
int ecb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_ECB *ecb)
{
int err;
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
LTC_ARGCHK(ecb != NULL);
if ((err = cipher_is_valid(ecb->cipher)) != CRYPT_OK) {
return err;
}
if (len % cipher_descriptor[ecb->cipher].block_length) {
return CRYPT_INVALID_ARG;
}
if (cipher_descriptor[ecb->cipher].accel_ecb_decrypt != NULL) {
return cipher_descriptor[ecb->cipher].accel_ecb_decrypt(ct, pt, len / cipher_descriptor[ecb->cipher].block_length, &ecb->key);
} else {
while (len) {
if ((err = cipher_descriptor[ecb->cipher].ecb_decrypt(ct, pt, &ecb->key)) != CRYPT_OK) {
return err;
}
pt += cipher_descriptor[ecb->cipher].block_length;
ct += cipher_descriptor[ecb->cipher].block_length;
len -= cipher_descriptor[ecb->cipher].block_length;
}
}
return CRYPT_OK;
}
#endif