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/*
* Copyright (C) 2015 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup sys_crypto_modes
* @{
*
* @file
* @brief Crypto mode - electronic code book
*
* @author Nico von Geyso <nico.geyso@fu-berlin.de>
*
* @}
*/
#include <stddef.h>
#include <stdint.h>
#include "crypto/modes/ecb.h"
int cipher_encrypt_ecb(cipher_t* cipher, uint8_t* input,
size_t length, uint8_t* output)
{
size_t offset;
uint8_t block_size;
block_size = cipher_get_block_size(cipher);
if (length % block_size != 0) {
return CIPHER_ERR_INVALID_LENGTH;
}
offset = 0;
do {
if (cipher_encrypt(cipher, input + offset, output + offset) != 1) {
return CIPHER_ERR_ENC_FAILED;
}
offset += block_size;
} while (offset < length);
return offset;
}
int cipher_decrypt_ecb(cipher_t* cipher, uint8_t* input,
size_t length, uint8_t* output)
{
size_t offset = 0;
uint8_t block_size;
block_size = cipher_get_block_size(cipher);
if (length % block_size != 0) {
return CIPHER_ERR_INVALID_LENGTH;
}
do {
if (cipher_decrypt(cipher, input + offset, output + offset) != 1) {
return CIPHER_ERR_DEC_FAILED;
}
offset += block_size;
} while (offset < length);
return offset;
}
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