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Diffstat (limited to 'qemu/roms/ipxe/src/tests/cbc_test.c')
| -rw-r--r-- | qemu/roms/ipxe/src/tests/cbc_test.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/tests/cbc_test.c b/qemu/roms/ipxe/src/tests/cbc_test.c new file mode 100644 index 000000000..cb0f7bdea --- /dev/null +++ b/qemu/roms/ipxe/src/tests/cbc_test.c @@ -0,0 +1,177 @@ +/* + * 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 ); +} |