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/*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* Cipher self-tests
*
*/
/* Forcibly enable assertions */
#undef NDEBUG
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ipxe/crypto.h>
#include <ipxe/profile.h>
#include <ipxe/test.h>
#include "cipher_test.h"
/** Number of sample iterations for profiling */
#define PROFILE_COUNT 16
/**
* Report a cipher encryption test result
*
* @v test Cipher test
* @v file Test code file
* @v line Test code line
*/
void cipher_encrypt_okx ( struct cipher_test *test, const char *file,
unsigned int line ) {
struct cipher_algorithm *cipher = test->cipher;
size_t len = test->len;
uint8_t ctx[cipher->ctxsize];
uint8_t ciphertext[len];
/* Initialise cipher */
okx ( cipher_setkey ( cipher, ctx, test->key, test->key_len ) == 0,
file, line );
cipher_setiv ( cipher, ctx, test->iv );
/* Perform encryption */
cipher_encrypt ( cipher, ctx, test->plaintext, ciphertext, len );
/* Compare against expected ciphertext */
okx ( memcmp ( ciphertext, test->ciphertext, len ) == 0, file, line );
}
/**
* Report a cipher decryption test result
*
* @v test Cipher test
* @v file Test code file
* @v line Test code line
*/
void cipher_decrypt_okx ( struct cipher_test *test, const char *file,
unsigned int line ) {
struct cipher_algorithm *cipher = test->cipher;
size_t len = test->len;
uint8_t ctx[cipher->ctxsize];
uint8_t plaintext[len];
/* Initialise cipher */
okx ( cipher_setkey ( cipher, ctx, test->key, test->key_len ) == 0,
file, line );
cipher_setiv ( cipher, ctx, test->iv );
/* Perform encryption */
cipher_decrypt ( cipher, ctx, test->ciphertext, plaintext, len );
/* Compare against expected plaintext */
okx ( memcmp ( plaintext, test->plaintext, len ) == 0, file, line );
}
/**
* Report a cipher encryption and decryption test result
*
* @v test Cipher test
* @v file Test code file
* @v line Test code line
*/
void cipher_okx ( struct cipher_test *test, const char *file,
unsigned int line ) {
cipher_encrypt_okx ( test, file, line );
cipher_decrypt_okx ( test, file, line );
}
/**
* Calculate cipher encryption or decryption cost
*
* @v cipher Cipher algorithm
* @v key_len Length of key
* @v op Encryption or decryption operation
* @ret cost Cost (in cycles per byte)
*/
static unsigned long
cipher_cost ( struct cipher_algorithm *cipher, size_t key_len,
void ( * op ) ( struct cipher_algorithm *cipher, void *ctx,
const void *src, void *dst, size_t len ) ) {
static uint8_t random[8192]; /* Too large for stack */
uint8_t key[key_len];
uint8_t iv[cipher->blocksize];
uint8_t ctx[cipher->ctxsize];
struct profiler profiler;
unsigned long cost;
unsigned int i;
int rc;
/* Fill buffer with pseudo-random data */
srand ( 0x1234568 );
for ( i = 0 ; i < sizeof ( random ) ; i++ )
random[i] = rand();
for ( i = 0 ; i < sizeof ( key ) ; i++ )
key[i] = rand();
for ( i = 0 ; i < sizeof ( iv ) ; i++ )
iv[i] = rand();
/* Initialise cipher */
rc = cipher_setkey ( cipher, ctx, key, key_len );
assert ( rc == 0 );
cipher_setiv ( cipher, ctx, iv );
/* Profile cipher operation */
memset ( &profiler, 0, sizeof ( profiler ) );
for ( i = 0 ; i < PROFILE_COUNT ; i++ ) {
profile_start ( &profiler );
op ( cipher, ctx, random, random, sizeof ( random ) );
profile_stop ( &profiler );
}
/* Round to nearest whole number of cycles per byte */
cost = ( ( profile_mean ( &profiler ) + ( sizeof ( random ) / 2 ) ) /
sizeof ( random ) );
return cost;
}
/**
* Calculate cipher encryption cost
*
* @v cipher Cipher algorithm
* @v key_len Length of key
* @ret cost Cost (in cycles per byte)
*/
unsigned long cipher_cost_encrypt ( struct cipher_algorithm *cipher,
size_t key_len ) {
return cipher_cost ( cipher, key_len, cipher_encrypt );
}
/**
* Calculate cipher decryption cost
*
* @v cipher Cipher algorithm
* @v key_len Length of key
* @ret cost Cost (in cycles per byte)
*/
unsigned long cipher_cost_decrypt ( struct cipher_algorithm *cipher,
size_t key_len ) {
return cipher_cost ( cipher, key_len, cipher_decrypt );
}
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