/*
* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* CBC self-tests
*
*/
/* Forcibly enable assertions */
#undef NDEBUG
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <ipxe/crypto.h>
#include "cbc_test.h"
/**
* Test CBC encryption
*
* @v cipher Cipher algorithm
* @v key Key
* @v key_len Length of key
* @v iv Initialisation vector
* @v plaintext Plaintext data
* @v expected_ciphertext Expected ciphertext data
* @v len Length of data
* @ret ok Ciphertext is as expected
*/
int cbc_test_encrypt ( struct cipher_algorithm *cipher, const void *key,
size_t key_len, const void *iv, const void *plaintext,
const void *expected_ciphertext, size_t len ) {
uint8_t ctx[ cipher->ctxsize ];
uint8_t ciphertext[ len ];
int rc;
/* Initialise cipher */
rc = cipher_setkey ( cipher, ctx, key, key_len );
assert ( rc == 0 );
cipher_setiv ( cipher, ctx, iv );
/* Perform encryption */
cipher_encrypt ( cipher, ctx, plaintext, ciphertext, len );
/* Verify result */
return ( memcmp ( ciphertext, expected_ciphertext, len ) == 0 );
}
/**
* Test CBC decryption
*
* @v cipher Cipher algorithm
* @v key Key
* @v key_len Length of key
* @v iv Initialisation vector
* @v ciphertext Ciphertext data
* @v expected_plaintext Expected plaintext data
* @v len Length of data
* @ret ok Plaintext is as expected
*/
int cbc_test_decrypt ( struct cipher_algorithm *cipher, const void *key,
size_t key_len, const void *iv, const void *ciphertext,
const void *expected_plaintext, size_t len ) {
uint8_t ctx[ cipher->ctxsize ];
uint8_t plaintext[ len ];
int rc;
/* Initialise cipher */
rc = cipher_setkey ( cipher, ctx, key, key_len );
assert ( rc == 0 );
cipher_setiv ( cipher, ctx, iv );
/* Perform encryption */
cipher_decrypt ( cipher, ctx, ciphertext, plaintext, len );
/* Verify result */
return ( memcmp ( plaintext, expected_plaintext, len ) == 0 );
}
