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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
*
* 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 <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <linux/moduleparam.h>
#include <linux/jiffies.h>
#include <linux/timex.h>
#include <linux/interrupt.h>
#include "tcrypt.h"
/*
* Need to kmalloc() memory for testing.
*/
#define TVMEMSIZE 16384
#define XBUFSIZE 32768
/*
* Indexes into the xbuf to simulate cross-page access.
*/
#define IDX1 32
#define IDX2 32400
#define IDX3 1
#define IDX4 8193
#define IDX5 22222
#define IDX6 17101
#define IDX7 27333
#define IDX8 3000
/*
* Used by test_cipher()
*/
#define ENCRYPT 1
#define DECRYPT 0
struct tcrypt_result {
struct completion completion;
int err;
};
static unsigned int IDX[8] = { IDX1, IDX2, IDX3, IDX4, IDX5, IDX6, IDX7, IDX8 };
/*
* Used by test_cipher_speed()
*/
static unsigned int sec;
static int mode;
static char *xbuf;
static char *axbuf;
static char *tvmem;
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", NULL
};
static void hexdump(unsigned char *buf, unsigned int len)
{
print_hex_dump(KERN_CONT, "", DUMP_PREFIX_OFFSET,
16, 1,
buf, len, false);
}
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 void test_hash(char *algo, struct hash_testvec *template,
unsigned int tcount)
{
unsigned int i, j, k, temp;
struct scatterlist sg[8];
char result[64];
struct crypto_ahash *tfm;
struct ahash_request *req;
struct tcrypt_result tresult;
int ret;
void *hash_buff;
printk("\ntesting %s\n", algo);
init_completion(&tresult.completion);
tfm = crypto_alloc_ahash(algo, 0, 0);
if (IS_ERR(tfm)) {
printk("failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
return;
}
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req) {
printk(KERN_ERR "failed to allocate request for %s\n", algo);
goto out_noreq;
}
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &tresult);
for (i = 0; i < tcount; i++) {
printk("test %u:\n", i + 1);
memset(result, 0, 64);
hash_buff = kzalloc(template[i].psize, GFP_KERNEL);
if (!hash_buff)
continue;
memcpy(hash_buff, template[i].plaintext, template[i].psize);
sg_init_one(&sg[0], hash_buff, template[i].psize);
if (template[i].ksize) {
crypto_ahash_clear_flags(tfm, ~0);
ret = crypto_ahash_setkey(tfm, template[i].key,
template[i].ksize);
if (ret) {
printk("setkey() failed ret=%d\n", ret);
kfree(hash_buff);
goto out;
}
}
ahash_request_set_crypt(req, sg, result, template[i].psize);
ret = crypto_ahash_digest(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&tresult.completion);
if (!ret && !(ret = tresult.err)) {
INIT_COMPLETION(tresult.completion);
break;
}
/* fall through */
default:
printk("digest () failed ret=%d\n", ret);
kfree(hash_buff);
goto out;
}
hexdump(result, crypto_ahash_digestsize(tfm));
printk("%s\n",
memcmp(result, template[i].digest,
crypto_ahash_digestsize(tfm)) ?
"fail" : "pass");
kfree(hash_buff);
}
printk("testing %s across pages\n", algo);
/* setup the dummy buffer first */
memset(xbuf, 0, XBUFSIZE);
j = 0;
for (i = 0; i < tcount; i++) {
if (template[i].np) {
j++;
printk("test %u:\n", j);
memset(result, 0, 64);
temp = 0;
sg_init_table(sg, template[i].np);
for (k = 0; k < template[i].np; k++) {
memcpy(&xbuf[IDX[k]],
template[i].plaintext + temp,
template[i].tap[k]);
temp += template[i].tap[k];
sg_set_buf(&sg[k], &xbuf[IDX[k]],
template[i].tap[k]);
}
if (template[i].ksize) {
crypto_ahash_clear_flags(tfm, ~0);
ret = crypto_ahash_setkey(tfm, template[i].key,
template[i].ksize);
if (ret) {
printk("setkey() failed ret=%d\n", ret);
goto out;
}
}
ahash_request_set_crypt(req, sg, result,
template[i].psize);
ret = crypto_ahash_digest(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&tresult.completion);
if (!ret && !(ret = tresult.err)) {
INIT_COMPLETION(tresult.completion);
break;
}
/* fall through */
default:
printk("digest () failed ret=%d\n", ret);
goto out;
}
hexdump(result, crypto_ahash_digestsize(tfm));
printk("%s\n",
memcmp(result, template[i].digest,
crypto_ahash_digestsize(tfm)) ?
"fail" : "pass");
}
}
out:
ahash_request_free(req);
out_noreq:
crypto_free_ahash(tfm);
}
static void test_aead(char *algo, int enc, struct aead_testvec *template,
unsigned int tcount)
{
unsigned int ret, i, j, k, n, temp;
char *q;
struct crypto_aead *tfm;
char *key;
struct aead_request *req;
struct scatterlist sg[8];
struct scatterlist asg[8];
const char *e;
struct tcrypt_result result;
unsigned int authsize;
void *input;
void *assoc;
char iv[MAX_IVLEN];
if (enc == ENCRYPT)
e = "encryption";
else
e = "decryption";
printk(KERN_INFO "\ntesting %s %s\n", algo, e);
init_completion(&result.completion);
tfm = crypto_alloc_aead(algo, 0, 0);
if (IS_ERR(tfm)) {
printk(KERN_INFO "failed to load transform for %s: %ld\n",
algo, PTR_ERR(tfm));
return;
}
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
printk(KERN_INFO "failed to allocate request for %s\n", algo);
goto out;
}
aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &result);
for (i = 0, j = 0; i < tcount; i++) {
if (!template[i].np) {
printk(KERN_INFO "test %u (%d bit key):\n",
++j, template[i].klen * 8);
/* some tepmplates have no input data but they will
* touch input
*/
input = kzalloc(template[i].ilen + template[i].rlen, GFP_KERNEL);
if (!input)
continue;
assoc = kzalloc(template[i].alen, GFP_KERNEL);
if (!assoc) {
kfree(input);
continue;
}
memcpy(input, template[i].input, template[i].ilen);
memcpy(assoc, template[i].assoc, template[i].alen);
if (template[i].iv)
memcpy(iv, template[i].iv, MAX_IVLEN);
else
memset(iv, 0, MAX_IVLEN);
crypto_aead_clear_flags(tfm, ~0);
if (template[i].wk)
crypto_aead_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
if (template[i].key)
key = template[i].key;
else
key = kzalloc(template[i].klen, GFP_KERNEL);
ret = crypto_aead_setkey(tfm, key,
template[i].klen);
if (ret) {
printk(KERN_INFO "setkey() failed flags=%x\n",
crypto_aead_get_flags(tfm));
if (!template[i].fail)
goto next_one;
}
authsize = abs(template[i].rlen - template[i].ilen);
ret = crypto_aead_setauthsize(tfm, authsize);
if (ret) {
printk(KERN_INFO
"failed to set authsize = %u\n",
authsize);
goto next_one;
}
sg_init_one(&sg[0], input,
template[i].ilen + (enc ? authsize : 0));
sg_init_one(&asg[0], assoc, template[i].alen);
aead_request_set_crypt(req, sg, sg,
template[i].ilen, iv);
aead_request_set_assoc(req, asg, template[i].alen);
ret = enc ?
crypto_aead_encrypt(req) :
crypto_aead_decrypt(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&result.completion);
if (!ret && !(ret = result.err)) {
INIT_COMPLETION(result.completion);
break;
}
/* fall through */
default:
printk(KERN_INFO "%s () failed err=%d\n",
e, -ret);
goto next_one;
}
q = input;
hexdump(q, template[i].rlen);
printk(KERN_INFO "enc/dec: %s\n",
memcmp(q, template[i].result,
template[i].rlen) ? "fail" : "pass");
next_one:
if (!template[i].key)
kfree(key);
kfree(assoc);
kfree(input);
}
}
printk(KERN_INFO "\ntesting %s %s across pages (chunking)\n", algo, e);
memset(axbuf, 0, XBUFSIZE);
for (i = 0, j = 0; i < tcount; i++) {
if (template[i].np) {
printk(KERN_INFO "test %u (%d bit key):\n",
++j, template[i].klen * 8);
if (template[i].iv)
memcpy(iv, template[i].iv, MAX_IVLEN);
else
memset(iv, 0, MAX_IVLEN);
crypto_aead_clear_flags(tfm, ~0);
if (template[i].wk)
crypto_aead_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
key = template[i].key;
ret = crypto_aead_setkey(tfm, key, template[i].klen);
if (ret) {
printk(KERN_INFO "setkey() failed flags=%x\n",
crypto_aead_get_flags(tfm));
if (!template[i].fail)
goto out;
}
memset(xbuf, 0, XBUFSIZE);
sg_init_table(sg, template[i].np);
for (k = 0, temp = 0; k < template[i].np; k++) {
memcpy(&xbuf[IDX[k]],
template[i].input + temp,
template[i].tap[k]);
temp += template[i].tap[k];
sg_set_buf(&sg[k], &xbuf[IDX[k]],
template[i].tap[k]);
}
authsize = abs(template[i].rlen - template[i].ilen);
ret = crypto_aead_setauthsize(tfm, authsize);
if (ret) {
printk(KERN_INFO
"failed to set authsize = %u\n",
authsize);
goto out;
}
if (enc)
sg[k - 1].length += authsize;
sg_init_table(asg, template[i].anp);
for (k = 0, temp = 0; k < template[i].anp; k++) {
memcpy(&axbuf[IDX[k]],
template[i].assoc + temp,
template[i].atap[k]);
temp += template[i].atap[k];
sg_set_buf(&asg[k], &axbuf[IDX[k]],
template[i].atap[k]);
}
aead_request_set_crypt(req, sg, sg,
template[i].ilen,
iv);
aead_request_set_assoc(req, asg, template[i].alen);
ret = enc ?
crypto_aead_encrypt(req) :
crypto_aead_decrypt(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&result.completion);
if (!ret && !(ret = result.err)) {
INIT_COMPLETION(result.completion);
break;
}
/* fall through */
default:
printk(KERN_INFO "%s () failed err=%d\n",
e, -ret);
goto out;
}
for (k = 0, temp = 0; k < template[i].np; k++) {
printk(KERN_INFO "page %u\n", k);
q = &axbuf[IDX[k]];
hexdump(q, template[i].tap[k]);
printk(KERN_INFO "%s\n",
memcmp(q, template[i].result + temp,
template[i].tap[k] -
(k < template[i].np - 1 || enc ?
0 : authsize)) ?
"fail" : "pass");
for (n = 0; q[template[i].tap[k] + n]; n++)
;
if (n) {
printk("Result buffer corruption %u "
"bytes:\n", n);
hexdump(&q[template[i].tap[k]], n);
}
temp += template[i].tap[k];
}
}
}
out:
crypto_free_aead(tfm);
aead_request_free(req);
}
static void test_cipher(char *algo, int enc,
struct cipher_testvec *template, unsigned int tcount)
{
unsigned int ret, i, j, k, n, temp;
char *q;
struct crypto_ablkcipher *tfm;
struct ablkcipher_request *req;
struct scatterlist sg[8];
const char *e;
struct tcrypt_result result;
void *data;
char iv[MAX_IVLEN];
if (enc == ENCRYPT)
e = "encryption";
else
e = "decryption";
printk("\ntesting %s %s\n", algo, e);
init_completion(&result.completion);
tfm = crypto_alloc_ablkcipher(algo, 0, 0);
if (IS_ERR(tfm)) {
printk("failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
return;
}
req = ablkcipher_request_alloc(tfm, GFP_KERNEL);
if (!req) {
printk("failed to allocate request for %s\n", algo);
goto out;
}
ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &result);
j = 0;
for (i = 0; i < tcount; i++) {
data = kzalloc(template[i].ilen, GFP_KERNEL);
if (!data)
continue;
memcpy(data, template[i].input, template[i].ilen);
if (template[i].iv)
memcpy(iv, template[i].iv, MAX_IVLEN);
else
memset(iv, 0, MAX_IVLEN);
if (!(template[i].np)) {
j++;
printk("test %u (%d bit key):\n",
j, template[i].klen * 8);
crypto_ablkcipher_clear_flags(tfm, ~0);
if (template[i].wk)
crypto_ablkcipher_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
ret = crypto_ablkcipher_setkey(tfm, template[i].key,
template[i].klen);
if (ret) {
printk("setkey() failed flags=%x\n",
crypto_ablkcipher_get_flags(tfm));
if (!template[i].fail) {
kfree(data);
goto out;
}
}
sg_init_one(&sg[0], data, template[i].ilen);
ablkcipher_request_set_crypt(req, sg, sg,
template[i].ilen, iv);
ret = enc ?
crypto_ablkcipher_encrypt(req) :
crypto_ablkcipher_decrypt(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&result.completion);
if (!ret && !((ret = result.err))) {
INIT_COMPLETION(result.completion);
break;
}
/* fall through */
default:
printk("%s () failed err=%d\n", e, -ret);
kfree(data);
goto out;
}
q = data;
hexdump(q, template[i].rlen);
printk("%s\n",
memcmp(q, template[i].result,
template[i].rlen) ? "fail" : "pass");
}
kfree(data);
}
printk("\ntesting %s %s across pages (chunking)\n", algo, e);
j = 0;
for (i = 0; i < tcount; i++) {
if (template[i].iv)
memcpy(iv, template[i].iv, MAX_IVLEN);
else
memset(iv, 0, MAX_IVLEN);
if (template[i].np) {
j++;
printk("test %u (%d bit key):\n",
j, template[i].klen * 8);
memset(xbuf, 0, XBUFSIZE);
crypto_ablkcipher_clear_flags(tfm, ~0);
if (template[i].wk)
crypto_ablkcipher_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
ret = crypto_ablkcipher_setkey(tfm, template[i].key,
template[i].klen);
if (ret) {
printk("setkey() failed flags=%x\n",
crypto_ablkcipher_get_flags(tfm));
if (!template[i].fail)
goto out;
}
temp = 0;
sg_init_table(sg, template[i].np);
for (k = 0; k < template[i].np; k++) {
memcpy(&xbuf[IDX[k]],
template[i].input + temp,
template[i].tap[k]);
temp += template[i].tap[k];
sg_set_buf(&sg[k], &xbuf[IDX[k]],
template[i].tap[k]);
}
ablkcipher_request_set_crypt(req, sg, sg,
template[i].ilen, iv);
ret = enc ?
crypto_ablkcipher_encrypt(req) :
crypto_ablkcipher_decrypt(req);
switch (ret) {
case 0:
break;
case -EINPROGRESS:
case -EBUSY:
ret = wait_for_completion_interruptible(
&result.completion);
if (!ret && !((ret = result.err))) {
INIT_COMPLETION(result.completion);
break;
}
/* fall through */
default:
printk("%s () failed err=%d\n", e, -ret);
goto out;
}
temp = 0;
for (k = 0; k < template[i].np; k++) {
printk("page %u\n", k);
q = &xbuf[IDX[k]];
hexdump(q, template[i].tap[k]);
printk("%s\n",
memcmp(q, template[i].result + temp,
template[i].tap[k]) ? "fail" :
"pass");
for (n = 0; q[template[i].tap[k] + n]; n++)
;
if (n) {
printk("Result buffer corruption %u "
"bytes:\n", n);
hexdump(&q[template[i].tap[k]], n);
}
temp += template[i].tap[k];
}
}
}
out:
crypto_free_ablkcipher(tfm);
ablkcipher_request_free(req);
}
static int test_cipher_jiffies(struct blkcipher_desc *desc, int enc, char *p,
int blen, int sec)
{
struct scatterlist sg[1];
unsigned long start, end;
int bcount;
int ret;
sg_init_one(sg, p, blen);
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, char *p,
int blen)
{
struct scatterlist sg[1];
unsigned long cycles = 0;
int ret = 0;
int i;
sg_init_one(sg, p, blen);
local_bh_disable();
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();
local_bh_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(char *algo, int enc, unsigned int sec,
struct cipher_testvec *template,
unsigned int tcount, u8 *keysize)
{
unsigned int ret, i, j, iv_len;
unsigned char *key, *p, 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 {
if ((*keysize + *b_size) > TVMEMSIZE) {
printk("template (%u) too big for tvmem (%u)\n",
*keysize + *b_size, TVMEMSIZE);
goto out;
}
printk("test %u (%d bit key, %d byte blocks): ", i,
*keysize * 8, *b_size);
memset(tvmem, 0xff, *keysize + *b_size);
/* set key, plain text and IV */
key = (unsigned char *)tvmem;
for (j = 0; j < tcount; j++) {
if (template[j].klen == *keysize) {
key = template[j].key;
break;
}
}
p = (unsigned char *)tvmem + *keysize;
ret = crypto_blkcipher_setkey(tfm, key, *keysize);
if (ret) {
printk("setkey() failed flags=%x\n",
crypto_blkcipher_get_flags(tfm));
goto out;
}
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, p, *b_size, sec);
else
ret = test_cipher_cycles(&desc, enc, p, *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, char *p, int blen,
char *out, int sec)
{
struct scatterlist sg[1];
unsigned long start, end;
int bcount;
int ret;
sg_init_table(sg, 1);
for (start = jiffies, end = start + sec * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
sg_set_buf(sg, p, blen);
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, char *p, int blen,
int plen, char *out, int sec)
{
struct scatterlist sg[1];
unsigned long start, end;
int bcount, pcount;
int ret;
if (plen == blen)
return test_hash_jiffies_digest(desc, p, blen, out, sec);
sg_init_table(sg, 1);
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) {
sg_set_buf(sg, p + 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, char *p, int blen,
char *out)
{
struct scatterlist sg[1];
unsigned long cycles = 0;
int i;
int ret;
sg_init_table(sg, 1);
local_bh_disable();
local_irq_disable();
/* Warm-up run. */
for (i = 0; i < 4; i++) {
sg_set_buf(sg, p, blen);
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();
sg_set_buf(sg, p, blen);
ret = crypto_hash_digest(desc, sg, blen, out);
if (ret)
goto out;
end = get_cycles();
cycles += end - start;
}
out:
local_irq_enable();
local_bh_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, char *p, int blen,
int plen, char *out)
{
struct scatterlist sg[1];
unsigned long cycles = 0;
int i, pcount;
int ret;
if (plen == blen)
return test_hash_cycles_digest(desc, p, blen, out);
sg_init_table(sg, 1);