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tcrypt.c
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tcrypt.c
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/*
* Quick & dirty crypto testing module.
*
* This will only exist until we have a better testing mechanism
* (e.g. a char device).
*
* Copyright (c) 2002 James Morris <[email protected]>
* Copyright (c) 2002 Jean-Francois Dive <[email protected]>
* Copyright (c) 2007 Nokia Siemens Networks
*
* Updated RFC4106 AES-GCM testing.
* Authors: Aidan O'Mahony ([email protected])
* Adrian Hoban <[email protected]>
* Gabriele Paoloni <[email protected]>
* Tadeusz Struk ([email protected])
* Copyright (c) 2010, Intel Corporation.
*
* 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 (at your option)
* any later version.
*
*/
#include <crypto/hash.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/scatterlist.h>
#include <linux/string.h>
#include <linux/moduleparam.h>
#include <linux/jiffies.h>
#include <linux/timex.h>
#include <linux/interrupt.h>
#include "tcrypt.h"
#include "internal.h"
/*
* Need slab memory for testing (size in number of pages).
*/
#define TVMEMSIZE 4
/*
* Used by test_cipher_speed()
*/
#define ENCRYPT 1
#define DECRYPT 0
/*
* Used by test_cipher_speed()
*/
static unsigned int sec;
static char *alg = NULL;
static u32 type;
static u32 mask;
static int mode;
static char *tvmem[TVMEMSIZE];
static char *check[] = {
"des", "md5", "des3_ede", "rot13", "sha1", "sha224", "sha256",
"blowfish", "twofish", "serpent", "sha384", "sha512", "md4", "aes",
"cast6", "arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta", "fcrypt",
"camellia", "seed", "salsa20", "rmd128", "rmd160", "rmd256", "rmd320",
"lzo", "cts", "zlib", NULL
};
static int test_cipher_jiffies(struct blkcipher_desc *desc, int enc,
struct scatterlist *sg, int blen, int sec)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
if (enc)
ret = crypto_blkcipher_encrypt(desc, sg, sg, blen);
else
ret = crypto_blkcipher_decrypt(desc, sg, sg, blen);
if (ret)
return ret;
}
printk("%d operations in %d seconds (%ld bytes)\n",
bcount, sec, (long)bcount * blen);
return 0;
}
static int test_cipher_cycles(struct blkcipher_desc *desc, int enc,
struct scatterlist *sg, int blen)
{
unsigned long cycles = 0;
int ret = 0;
int i;
local_irq_disable();
/* Warm-up run. */
for (i = 0; i < 4; i++) {
if (enc)
ret = crypto_blkcipher_encrypt(desc, sg, sg, blen);
else
ret = crypto_blkcipher_decrypt(desc, sg, sg, blen);
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
if (enc)
ret = crypto_blkcipher_encrypt(desc, sg, sg, blen);
else
ret = crypto_blkcipher_decrypt(desc, sg, sg, blen);
end = get_cycles();
if (ret)
goto out;
cycles += end - start;
}
out:
local_irq_enable();
if (ret == 0)
printk("1 operation in %lu cycles (%d bytes)\n",
(cycles + 4) / 8, blen);
return ret;
}
static u32 block_sizes[] = { 16, 64, 256, 1024, 8192, 0 };
static void test_cipher_speed(const char *algo, int enc, unsigned int sec,
struct cipher_speed_template *template,
unsigned int tcount, u8 *keysize)
{
unsigned int ret, i, j, iv_len;
const char *key;
char iv[128];
struct crypto_blkcipher *tfm;
struct blkcipher_desc desc;
const char *e;
u32 *b_size;
if (enc == ENCRYPT)
e = "encryption";
else
e = "decryption";
printk("\ntesting speed of %s %s\n", algo, e);
tfm = crypto_alloc_blkcipher(algo, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
printk("failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
return;
}
desc.tfm = tfm;
desc.flags = 0;
i = 0;
do {
b_size = block_sizes;
do {
struct scatterlist sg[TVMEMSIZE];
if ((*keysize + *b_size) > TVMEMSIZE * PAGE_SIZE) {
printk("template (%u) too big for "
"tvmem (%lu)\n", *keysize + *b_size,
TVMEMSIZE * PAGE_SIZE);
goto out;
}
printk("test %u (%d bit key, %d byte blocks): ", i,
*keysize * 8, *b_size);
memset(tvmem[0], 0xff, PAGE_SIZE);
/* set key, plain text and IV */
key = tvmem[0];
for (j = 0; j < tcount; j++) {
if (template[j].klen == *keysize) {
key = template[j].key;
break;
}
}
ret = crypto_blkcipher_setkey(tfm, key, *keysize);
if (ret) {
printk("setkey() failed flags=%x\n",
crypto_blkcipher_get_flags(tfm));
goto out;
}
sg_init_table(sg, TVMEMSIZE);
sg_set_buf(sg, tvmem[0] + *keysize,
PAGE_SIZE - *keysize);
for (j = 1; j < TVMEMSIZE; j++) {
sg_set_buf(sg + j, tvmem[j], PAGE_SIZE);
memset (tvmem[j], 0xff, PAGE_SIZE);
}
iv_len = crypto_blkcipher_ivsize(tfm);
if (iv_len) {
memset(&iv, 0xff, iv_len);
crypto_blkcipher_set_iv(tfm, iv, iv_len);
}
if (sec)
ret = test_cipher_jiffies(&desc, enc, sg,
*b_size, sec);
else
ret = test_cipher_cycles(&desc, enc, sg,
*b_size);
if (ret) {
printk("%s() failed flags=%x\n", e, desc.flags);
break;
}
b_size++;
i++;
} while (*b_size);
keysize++;
} while (*keysize);
out:
crypto_free_blkcipher(tfm);
}
static int test_hash_jiffies_digest(struct hash_desc *desc,
struct scatterlist *sg, int blen,
char *out, int sec)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
ret = crypto_hash_digest(desc, sg, blen, out);
if (ret)
return ret;
}
printk("%6u opers/sec, %9lu bytes/sec\n",
bcount / sec, ((long)bcount * blen) / sec);
return 0;
}
static int test_hash_jiffies(struct hash_desc *desc, struct scatterlist *sg,
int blen, int plen, char *out, int sec)
{
unsigned long start, end;
int bcount, pcount;
int ret;
if (plen == blen)
return test_hash_jiffies_digest(desc, sg, blen, out, sec);
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
ret = crypto_hash_init(desc);
if (ret)
return ret;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = crypto_hash_update(desc, sg, plen);
if (ret)
return ret;
}
/* we assume there is enough space in 'out' for the result */
ret = crypto_hash_final(desc, out);
if (ret)
return ret;
}
printk("%6u opers/sec, %9lu bytes/sec\n",
bcount / sec, ((long)bcount * blen) / sec);
return 0;
}
static int test_hash_cycles_digest(struct hash_desc *desc,
struct scatterlist *sg, int blen, char *out)
{
unsigned long cycles = 0;
int i;
int ret;
local_irq_disable();
/* Warm-up run. */
for (i = 0; i < 4; i++) {
ret = crypto_hash_digest(desc, sg, blen, out);
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
ret = crypto_hash_digest(desc, sg, blen, out);
if (ret)
goto out;
end = get_cycles();
cycles += end - start;
}
out:
local_irq_enable();
if (ret)
return ret;
printk("%6lu cycles/operation, %4lu cycles/byte\n",
cycles / 8, cycles / (8 * blen));
return 0;
}
static int test_hash_cycles(struct hash_desc *desc, struct scatterlist *sg,
int blen, int plen, char *out)
{
unsigned long cycles = 0;
int i, pcount;
int ret;
if (plen == blen)
return test_hash_cycles_digest(desc, sg, blen, out);
local_irq_disable();
/* Warm-up run. */
for (i = 0; i < 4; i++) {
ret = crypto_hash_init(desc);
if (ret)
goto out;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = crypto_hash_update(desc, sg, plen);
if (ret)
goto out;
}
ret = crypto_hash_final(desc, out);
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
ret = crypto_hash_init(desc);
if (ret)
goto out;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = crypto_hash_update(desc, sg, plen);
if (ret)
goto out;
}
ret = crypto_hash_final(desc, out);
if (ret)
goto out;
end = get_cycles();
cycles += end - start;
}
out:
local_irq_enable();
if (ret)
return ret;
printk("%6lu cycles/operation, %4lu cycles/byte\n",
cycles / 8, cycles / (8 * blen));
return 0;
}
static void test_hash_sg_init(struct scatterlist *sg)
{
int i;
sg_init_table(sg, TVMEMSIZE);
for (i = 0; i < TVMEMSIZE; i++) {
sg_set_buf(sg + i, tvmem[i], PAGE_SIZE);
memset(tvmem[i], 0xff, PAGE_SIZE);
}
}
static void test_hash_speed(const char *algo, unsigned int sec,
struct hash_speed *speed)
{
struct scatterlist sg[TVMEMSIZE];
struct crypto_hash *tfm;
struct hash_desc desc;
static char output[1024];
int i;
int ret;
printk(KERN_INFO "\ntesting speed of %s\n", algo);
tfm = crypto_alloc_hash(algo, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
printk(KERN_ERR "failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
return;
}
desc.tfm = tfm;
desc.flags = 0;
if (crypto_hash_digestsize(tfm) > sizeof(output)) {
printk(KERN_ERR "digestsize(%u) > outputbuffer(%zu)\n",
crypto_hash_digestsize(tfm), sizeof(output));
goto out;
}
test_hash_sg_init(sg);
for (i = 0; speed[i].blen != 0; i++) {
if (speed[i].blen > TVMEMSIZE * PAGE_SIZE) {
printk(KERN_ERR
"template (%u) too big for tvmem (%lu)\n",
speed[i].blen, TVMEMSIZE * PAGE_SIZE);
goto out;
}
if (speed[i].klen)
crypto_hash_setkey(tfm, tvmem[0], speed[i].klen);
printk(KERN_INFO "test%3u "
"(%5u byte blocks,%5u bytes per update,%4u updates): ",
i, speed[i].blen, speed[i].plen, speed[i].blen / speed[i].plen);
if (sec)
ret = test_hash_jiffies(&desc, sg, speed[i].blen,
speed[i].plen, output, sec);
else
ret = test_hash_cycles(&desc, sg, speed[i].blen,
speed[i].plen, output);
if (ret) {
printk(KERN_ERR "hashing failed ret=%d\n", ret);
break;
}
}
out:
crypto_free_hash(tfm);
}
struct tcrypt_result {
struct completion completion;
int err;
};
static void tcrypt_complete(struct crypto_async_request *req, int err)
{
struct tcrypt_result *res = req->data;
if (err == -EINPROGRESS)
return;
res->err = err;
complete(&res->completion);
}
static inline int do_one_ahash_op(struct ahash_request *req, int ret)
{
if (ret == -EINPROGRESS || ret == -EBUSY) {
struct tcrypt_result *tr = req->base.data;
ret = wait_for_completion_interruptible(&tr->completion);
if (!ret)
ret = tr->err;
INIT_COMPLETION(tr->completion);
}
return ret;
}
static int test_ahash_jiffies_digest(struct ahash_request *req, int blen,
char *out, int sec)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
ret = do_one_ahash_op(req, crypto_ahash_digest(req));
if (ret)
return ret;
}
printk("%6u opers/sec, %9lu bytes/sec\n",
bcount / sec, ((long)bcount * blen) / sec);
return 0;
}
static int test_ahash_jiffies(struct ahash_request *req, int blen,
int plen, char *out, int sec)
{
unsigned long start, end;
int bcount, pcount;
int ret;
if (plen == blen)
return test_ahash_jiffies_digest(req, blen, out, sec);
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
ret = crypto_ahash_init(req);
if (ret)
return ret;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = do_one_ahash_op(req, crypto_ahash_update(req));
if (ret)
return ret;
}
/* we assume there is enough space in 'out' for the result */
ret = do_one_ahash_op(req, crypto_ahash_final(req));
if (ret)
return ret;
}
pr_cont("%6u opers/sec, %9lu bytes/sec\n",
bcount / sec, ((long)bcount * blen) / sec);
return 0;
}
static int test_ahash_cycles_digest(struct ahash_request *req, int blen,
char *out)
{
unsigned long cycles = 0;
int ret, i;
/* Warm-up run. */
for (i = 0; i < 4; i++) {
ret = do_one_ahash_op(req, crypto_ahash_digest(req));
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
ret = do_one_ahash_op(req, crypto_ahash_digest(req));
if (ret)
goto out;
end = get_cycles();
cycles += end - start;
}
out:
if (ret)
return ret;
pr_cont("%6lu cycles/operation, %4lu cycles/byte\n",
cycles / 8, cycles / (8 * blen));
return 0;
}
static int test_ahash_cycles(struct ahash_request *req, int blen,
int plen, char *out)
{
unsigned long cycles = 0;
int i, pcount, ret;
if (plen == blen)
return test_ahash_cycles_digest(req, blen, out);
/* Warm-up run. */
for (i = 0; i < 4; i++) {
ret = crypto_ahash_init(req);
if (ret)
goto out;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = do_one_ahash_op(req, crypto_ahash_update(req));
if (ret)
goto out;
}
ret = do_one_ahash_op(req, crypto_ahash_final(req));
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
ret = crypto_ahash_init(req);
if (ret)
goto out;
for (pcount = 0; pcount < blen; pcount += plen) {
ret = do_one_ahash_op(req, crypto_ahash_update(req));
if (ret)
goto out;
}
ret = do_one_ahash_op(req, crypto_ahash_final(req));
if (ret)
goto out;
end = get_cycles();
cycles += end - start;
}
out:
if (ret)
return ret;
pr_cont("%6lu cycles/operation, %4lu cycles/byte\n",
cycles / 8, cycles / (8 * blen));
return 0;
}
static void test_ahash_speed(const char *algo, unsigned int sec,
struct hash_speed *speed)
{
struct scatterlist sg[TVMEMSIZE];
struct tcrypt_result tresult;
struct ahash_request *req;
struct crypto_ahash *tfm;
static char output[1024];
int i, ret;
printk(KERN_INFO "\ntesting speed of async %s\n", algo);
tfm = crypto_alloc_ahash(algo, 0, 0);
if (IS_ERR(tfm)) {
pr_err("failed to load transform for %s: %ld\n",
algo, PTR_ERR(tfm));
return;
}
if (crypto_ahash_digestsize(tfm) > sizeof(output)) {
pr_err("digestsize(%u) > outputbuffer(%zu)\n",
crypto_ahash_digestsize(tfm), sizeof(output));
goto out;
}
test_hash_sg_init(sg);
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req) {
pr_err("ahash request allocation failure\n");
goto out;
}
init_completion(&tresult.completion);
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &tresult);
for (i = 0; speed[i].blen != 0; i++) {
if (speed[i].blen > TVMEMSIZE * PAGE_SIZE) {
pr_err("template (%u) too big for tvmem (%lu)\n",
speed[i].blen, TVMEMSIZE * PAGE_SIZE);
break;
}
pr_info("test%3u "
"(%5u byte blocks,%5u bytes per update,%4u updates): ",
i, speed[i].blen, speed[i].plen, speed[i].blen / speed[i].plen);
ahash_request_set_crypt(req, sg, output, speed[i].plen);
if (sec)
ret = test_ahash_jiffies(req, speed[i].blen,
speed[i].plen, output, sec);
else
ret = test_ahash_cycles(req, speed[i].blen,
speed[i].plen, output);
if (ret) {
pr_err("hashing failed ret=%d\n", ret);
break;
}
}
ahash_request_free(req);
out:
crypto_free_ahash(tfm);
}
static inline int do_one_acipher_op(struct ablkcipher_request *req, int ret)
{
if (ret == -EINPROGRESS || ret == -EBUSY) {
struct tcrypt_result *tr = req->base.data;
ret = wait_for_completion_interruptible(&tr->completion);
if (!ret)
ret = tr->err;
INIT_COMPLETION(tr->completion);
}
return ret;
}
static int test_acipher_jiffies(struct ablkcipher_request *req, int enc,
int blen, int sec)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
if (enc)
ret = do_one_acipher_op(req,
crypto_ablkcipher_encrypt(req));
else
ret = do_one_acipher_op(req,
crypto_ablkcipher_decrypt(req));
if (ret)
return ret;
}
pr_cont("%d operations in %d seconds (%ld bytes)\n",
bcount, sec, (long)bcount * blen);
return 0;
}
static int test_acipher_cycles(struct ablkcipher_request *req, int enc,
int blen)
{
unsigned long cycles = 0;
int ret = 0;
int i;
/* Warm-up run. */
for (i = 0; i < 4; i++) {
if (enc)
ret = do_one_acipher_op(req,
crypto_ablkcipher_encrypt(req));
else
ret = do_one_acipher_op(req,
crypto_ablkcipher_decrypt(req));
if (ret)
goto out;
}
/* The real thing. */
for (i = 0; i < 8; i++) {
cycles_t start, end;
start = get_cycles();
if (enc)
ret = do_one_acipher_op(req,
crypto_ablkcipher_encrypt(req));
else
ret = do_one_acipher_op(req,
crypto_ablkcipher_decrypt(req));
end = get_cycles();
if (ret)
goto out;
cycles += end - start;
}
out:
if (ret == 0)
pr_cont("1 operation in %lu cycles (%d bytes)\n",
(cycles + 4) / 8, blen);
return ret;
}
static void test_acipher_speed(const char *algo, int enc, unsigned int sec,
struct cipher_speed_template *template,
unsigned int tcount, u8 *keysize)
{
unsigned int ret, i, j, k, iv_len;
struct tcrypt_result tresult;
const char *key;
char iv[128];
struct ablkcipher_request *req;
struct crypto_ablkcipher *tfm;
const char *e;
u32 *b_size;
if (enc == ENCRYPT)
e = "encryption";
else
e = "decryption";
pr_info("\ntesting speed of async %s %s\n", algo, e);
init_completion(&tresult.completion);
tfm = crypto_alloc_ablkcipher(algo, 0, 0);
if (IS_ERR(tfm)) {
pr_err("failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
return;
}
req = ablkcipher_request_alloc(tfm, GFP_KERNEL);
if (!req) {
pr_err("tcrypt: skcipher: Failed to allocate request for %s\n",
algo);
goto out;
}
ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &tresult);
i = 0;
do {
b_size = block_sizes;
do {
struct scatterlist sg[TVMEMSIZE];
if ((*keysize + *b_size) > TVMEMSIZE * PAGE_SIZE) {
pr_err("template (%u) too big for "
"tvmem (%lu)\n", *keysize + *b_size,
TVMEMSIZE * PAGE_SIZE);
goto out_free_req;
}
pr_info("test %u (%d bit key, %d byte blocks): ", i,
*keysize * 8, *b_size);
memset(tvmem[0], 0xff, PAGE_SIZE);
/* set key, plain text and IV */
key = tvmem[0];
for (j = 0; j < tcount; j++) {
if (template[j].klen == *keysize) {
key = template[j].key;
break;
}
}
crypto_ablkcipher_clear_flags(tfm, ~0);
ret = crypto_ablkcipher_setkey(tfm, key, *keysize);
if (ret) {
pr_err("setkey() failed flags=%x\n",
crypto_ablkcipher_get_flags(tfm));
goto out_free_req;
}
sg_init_table(sg, TVMEMSIZE);
k = *keysize + *b_size;
if (k > PAGE_SIZE) {
sg_set_buf(sg, tvmem[0] + *keysize,
PAGE_SIZE - *keysize);
k -= PAGE_SIZE;
j = 1;
while (k > PAGE_SIZE) {
sg_set_buf(sg + j, tvmem[j], PAGE_SIZE);
memset(tvmem[j], 0xff, PAGE_SIZE);
j++;
k -= PAGE_SIZE;
}
sg_set_buf(sg + j, tvmem[j], k);
memset(tvmem[j], 0xff, k);
} else {
sg_set_buf(sg, tvmem[0] + *keysize, *b_size);
}
iv_len = crypto_ablkcipher_ivsize(tfm);
if (iv_len)
memset(&iv, 0xff, iv_len);
ablkcipher_request_set_crypt(req, sg, sg, *b_size, iv);
if (sec)
ret = test_acipher_jiffies(req, enc,
*b_size, sec);
else
ret = test_acipher_cycles(req, enc,
*b_size);
if (ret) {
pr_err("%s() failed flags=%x\n", e,
crypto_ablkcipher_get_flags(tfm));
break;
}
b_size++;
i++;
} while (*b_size);
keysize++;
} while (*keysize);
out_free_req:
ablkcipher_request_free(req);
out:
crypto_free_ablkcipher(tfm);
}
static void test_available(void)
{
char **name = check;
while (*name) {
printk("alg %s ", *name);
printk(crypto_has_alg(*name, 0, 0) ?
"found\n" : "not found\n");
name++;
}
}
static inline int tcrypt_test(const char *alg)
{
int ret;
ret = alg_test(alg, alg, 0, 0);
/* non-fips algs return -EINVAL in fips mode */
if (fips_enabled && ret == -EINVAL)
ret = 0;
return ret;
}
static int do_test(int m)
{
int i;
int ret = 0;
switch (m) {
case 0:
for (i = 1; i < 200; i++)
ret += do_test(i);
break;
case 1:
ret += tcrypt_test("md5");
break;
case 2:
ret += tcrypt_test("sha1");
break;
case 3:
ret += tcrypt_test("ecb(des)");
ret += tcrypt_test("cbc(des)");
break;
case 4:
ret += tcrypt_test("ecb(des3_ede)");
ret += tcrypt_test("cbc(des3_ede)");
break;
case 5:
ret += tcrypt_test("md4");
break;
case 6:
ret += tcrypt_test("sha256");
break;
case 7:
ret += tcrypt_test("ecb(blowfish)");
ret += tcrypt_test("cbc(blowfish)");
ret += tcrypt_test("ctr(blowfish)");
break;
case 8:
ret += tcrypt_test("ecb(twofish)");
ret += tcrypt_test("cbc(twofish)");
ret += tcrypt_test("ctr(twofish)");
ret += tcrypt_test("lrw(twofish)");
ret += tcrypt_test("xts(twofish)");