--- /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