proxmark3/common/polarssl/libpcrypto.c

//-----------------------------------------------------------------------------
// Copyright (C) 2018 Merlok
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// crypto commands
//-----------------------------------------------------------------------------

#include "polarssl/libpcrypto.h"
#include <polarssl/aes.h>

int aes_encode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
	uint8_t iiv[16] = {0};
	if (iv)
		memcpy(iiv, iv, 16);
	
	aes_context aes;
	aes_init(&aes);
	if (aes_setkey_enc(&aes, key, 128))
		return 1;
	if (aes_crypt_cbc(&aes, AES_ENCRYPT, length, iiv, input, output))
		return 2;
	aes_free(&aes);

	return 0;
}

int aes_decode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
	uint8_t iiv[16] = {0};
	if (iv)
		memcpy(iiv, iv, 16);
	
	aes_context aes;
	aes_init(&aes);
	if (aes_setkey_dec(&aes, key, 128))
		return 1;
	if (aes_crypt_cbc(&aes, AES_DECRYPT, length, iiv, input, output))
		return 2;
	aes_free(&aes);

	return 0;
}