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[test] Add speed tests for cipher algorithms

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-09-26 15:27:33 +01:00
parent 681a219caa
commit c1adf7dabe
3 changed files with 94 additions and 4 deletions

View File

@ -169,9 +169,21 @@ AES_CBC_TEST ( test_256,
*
*/
static void aes_cbc_test_exec ( void ) {
struct cipher_algorithm *cipher = &aes_cbc_algorithm;
/* Correctness tests */
aes_cbc_ok ( &test_128 );
aes_cbc_ok ( &test_256 );
/* Speed tests */
DBG ( "AES128 encryption required %ld cycles per byte\n",
cbc_cost_encrypt ( cipher, test_128.key_len ) );
DBG ( "AES128 decryption required %ld cycles per byte\n",
cbc_cost_decrypt ( cipher, test_128.key_len ) );
DBG ( "AES256 encryption required %ld cycles per byte\n",
cbc_cost_encrypt ( cipher, test_256.key_len ) );
DBG ( "AES256 decryption required %ld cycles per byte\n",
cbc_cost_decrypt ( cipher, test_256.key_len ) );
}
/** AES-in-CBC-mode self-test */

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@ -29,9 +29,11 @@ FILE_LICENCE ( GPL2_OR_LATER );
#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"
/**
@ -49,8 +51,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
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 ];
uint8_t ctx[cipher->ctxsize];
uint8_t ciphertext[len];
int rc;
/* Initialise cipher */
@ -80,8 +82,8 @@ int cbc_test_encrypt ( struct cipher_algorithm *cipher, const void *key,
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 ];
uint8_t ctx[cipher->ctxsize];
uint8_t plaintext[len];
int rc;
/* Initialise cipher */
@ -95,3 +97,75 @@ int cbc_test_decrypt ( struct cipher_algorithm *cipher, const void *key,
/* 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];
union profiler profiler;
unsigned long long elapsed;
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 );
/* Time operation */
profile ( &profiler );
op ( cipher, ctx, random, random, sizeof ( random ) );
elapsed = profile ( &profiler );
/* Round to nearest whole number of cycles per byte */
cost = ( ( elapsed + ( 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 );
}

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@ -15,6 +15,10 @@ extern 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 );
extern unsigned long cbc_cost_encrypt ( struct cipher_algorithm *cipher,
size_t key_len );
extern unsigned long cbc_cost_decrypt ( struct cipher_algorithm *cipher,
size_t key_len );
/**
* Report CBC encryption test result