+++ /dev/null
-/*
- * 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.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-/** @file
- *
- * CBC 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 "cbc_test.h"
-
-/** Number of sample iterations for profiling */
-#define PROFILE_COUNT 16
-
-/**
- * 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 );
-}
-
-/**
- * Calculate CBC 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 cbc_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 CBC encryption cost
- *
- * @v cipher Cipher algorithm
- * @v key_len Length of key
- * @ret cost Cost (in cycles per byte)
- */
-unsigned long cbc_cost_encrypt ( struct cipher_algorithm *cipher,
- size_t key_len ) {
- return cbc_cost ( cipher, key_len, cipher_encrypt );
-}
-
-/**
- * Calculate CBC decryption cost
- *
- * @v cipher Cipher algorithm
- * @v key_len Length of key
- * @ret cost Cost (in cycles per byte)
- */
-unsigned long cbc_cost_decrypt ( struct cipher_algorithm *cipher,
- size_t key_len ) {
- return cbc_cost ( cipher, key_len, cipher_decrypt );
-}
Code Review / kvmfornfv.git / blobdiff