97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
|
/*
|
||
|
* 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 );
|
||
|
}
|