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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/aead.h>
#include <crypto/hash.h>
#include <linux/err.h>
#include <linux/fips.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"
/*
* Need slab memory for testing (size in number of pages).
*/
#define TVMEMSIZE 4
/*
* Used by test_cipher_speed()
*/
#define ENCRYPT 1
#define DECRYPT 0
#define MAX_DIGEST_SIZE 64
/*
* return a string with the driver name
*/
#define get_driver_name(tfm_type, tfm) crypto_tfm_alg_driver_name(tfm_type ## _tfm(tfm))
/*
* 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
};
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 int test_cipher_jiffies(struct blkcipher_desc *desc, int enc,
struct scatterlist *sg, int blen, int secs)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + secs * 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, secs, (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 inline int do_one_aead_op(struct aead_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;
reinit_completion(&tr->completion);
}
return ret;
}
static int test_aead_jiffies(struct aead_request *req, int enc,
int blen, int secs)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + secs * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
if (enc)
ret = do_one_aead_op(req, crypto_aead_encrypt(req));
else
ret = do_one_aead_op(req, crypto_aead_decrypt(req));
if (ret)
return ret;
}
printk("%d operations in %d seconds (%ld bytes)\n",
bcount, secs, (long)bcount * blen);
return 0;
}
static int test_aead_cycles(struct aead_request *req, int enc, 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 = do_one_aead_op(req, crypto_aead_encrypt(req));
else
ret = do_one_aead_op(req, crypto_aead_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_aead_op(req, crypto_aead_encrypt(req));
else
ret = do_one_aead_op(req, crypto_aead_decrypt(req));
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 u32 aead_sizes[] = { 16, 64, 256, 512, 1024, 2048, 4096, 8192, 0 };
#define XBUFSIZE 8
#define MAX_IVLEN 32
static int testmgr_alloc_buf(char *buf[XBUFSIZE])
{
int i;
for (i = 0; i < XBUFSIZE; i++) {
buf[i] = (void *)__get_free_page(GFP_KERNEL);
if (!buf[i])
goto err_free_buf;
}
return 0;
err_free_buf:
while (i-- > 0)
free_page((unsigned long)buf[i]);
return -ENOMEM;
}
static void testmgr_free_buf(char *buf[XBUFSIZE])
{
int i;
for (i = 0; i < XBUFSIZE; i++)
free_page((unsigned long)buf[i]);
}
static void sg_init_aead(struct scatterlist *sg, char *xbuf[XBUFSIZE],
unsigned int buflen)
{
int np = (buflen + PAGE_SIZE - 1)/PAGE_SIZE;
int k, rem;
if (np > XBUFSIZE) {
rem = PAGE_SIZE;
np = XBUFSIZE;
} else {
rem = buflen % PAGE_SIZE;
}
sg_init_table(sg, np + 1);
np--;
for (k = 0; k < np; k++)
sg_set_buf(&sg[k + 1], xbuf[k], PAGE_SIZE);
sg_set_buf(&sg[k + 1], xbuf[k], rem);
}
static void test_aead_speed(const char *algo, int enc, unsigned int secs,
struct aead_speed_template *template,
unsigned int tcount, u8 authsize,
unsigned int aad_size, u8 *keysize)
{
unsigned int i, j;
struct crypto_aead *tfm;
int ret = -ENOMEM;
const char *key;
struct aead_request *req;
struct scatterlist *sg;
struct scatterlist *sgout;
const char *e;
void *assoc;
char *iv;
char *xbuf[XBUFSIZE];
char *xoutbuf[XBUFSIZE];
char *axbuf[XBUFSIZE];
unsigned int *b_size;
unsigned int iv_len;
struct tcrypt_result result;
iv = kzalloc(MAX_IVLEN, GFP_KERNEL);
if (!iv)
return;
if (aad_size >= PAGE_SIZE) {
pr_err("associate data length (%u) too big\n", aad_size);
goto out_noxbuf;
}
if (enc == ENCRYPT)
e = "encryption";
else
e = "decryption";
if (testmgr_alloc_buf(xbuf))
goto out_noxbuf;
if (testmgr_alloc_buf(axbuf))
goto out_noaxbuf;
if (testmgr_alloc_buf(xoutbuf))
goto out_nooutbuf;
sg = kmalloc(sizeof(*sg) * 9 * 2, GFP_KERNEL);
if (!sg)
goto out_nosg;
sgout = &sg[9];
tfm = crypto_alloc_aead(algo, 0, 0);
if (IS_ERR(tfm)) {
pr_err("alg: aead: Failed to load transform for %s: %ld\n", algo,
PTR_ERR(tfm));
goto out_notfm;
}
init_completion(&result.completion);
printk(KERN_INFO "\ntesting speed of %s (%s) %s\n", algo,
get_driver_name(crypto_aead, tfm), e);
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
pr_err("alg: aead: Failed to allocate request for %s\n",
algo);
goto out_noreq;
}
aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &result);
i = 0;
do {
b_size = aead_sizes;
do {
assoc = axbuf[0];
memset(assoc, 0xff, aad_size);
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;
}
key = tvmem[0];
for (j = 0; j < tcount; j++) {
if (template[j].klen == *keysize) {
key = template[j].key;
break;
}
}
ret = crypto_aead_setkey(tfm, key, *keysize);
ret = crypto_aead_setauthsize(tfm, authsize);
iv_len = crypto_aead_ivsize(tfm);
if (iv_len)
memset(iv, 0xff, iv_len);
crypto_aead_clear_flags(tfm, ~0);
printk(KERN_INFO "test %u (%d bit key, %d byte blocks): ",
i, *keysize * 8, *b_size);
memset(tvmem[0], 0xff, PAGE_SIZE);
if (ret) {
pr_err("setkey() failed flags=%x\n",
crypto_aead_get_flags(tfm));
goto out;
}
sg_init_aead(sg, xbuf,
*b_size + (enc ? authsize : 0));
sg_init_aead(sgout, xoutbuf,
*b_size + (enc ? authsize : 0));
sg_set_buf(&sg[0], assoc, aad_size);
sg_set_buf(&sgout[0], assoc, aad_size);
aead_request_set_crypt(req, sg, sgout, *b_size, iv);
aead_request_set_ad(req, aad_size);
if (secs)
ret = test_aead_jiffies(req, enc, *b_size,
secs);
else
ret = test_aead_cycles(req, enc, *b_size);
if (ret) {
pr_err("%s() failed return code=%d\n", e, ret);
break;
}
b_size++;
i++;
} while (*b_size);
keysize++;
} while (*keysize);
out:
aead_request_free(req);
out_noreq:
crypto_free_aead(tfm);
out_notfm:
kfree(sg);
out_nosg:
testmgr_free_buf(xoutbuf);
out_nooutbuf:
testmgr_free_buf(axbuf);
out_noaxbuf:
testmgr_free_buf(xbuf);
out_noxbuf:
kfree(iv);
return;
}
static void test_cipher_speed(const char *algo, int enc, unsigned int secs,
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";
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;
printk(KERN_INFO "\ntesting speed of %s (%s) %s\n", algo,
get_driver_name(crypto_blkcipher, tfm), e);
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 (secs)
ret = test_cipher_jiffies(&desc, enc, sg,
*b_size, secs);
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 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 inline int do_one_ahash_op(struct ahash_request *req, int ret)
{
if (ret == -EINPROGRESS || ret == -EBUSY) {
struct tcrypt_result *tr = req->base.data;
wait_for_completion(&tr->completion);
reinit_completion(&tr->completion);
ret = tr->err;
}
return ret;
}
static int test_ahash_jiffies_digest(struct ahash_request *req, int blen,
char *out, int secs)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + secs * 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 / secs, ((long)bcount * blen) / secs);
return 0;
}
static int test_ahash_jiffies(struct ahash_request *req, int blen,
int plen, char *out, int secs)
{
unsigned long start, end;
int bcount, pcount;
int ret;
if (plen == blen)
return test_ahash_jiffies_digest(req, blen, out, secs);
for (start = jiffies, end = start + secs * HZ, bcount = 0;
time_before(jiffies, end); bcount++) {
ret = do_one_ahash_op(req, 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 / secs, ((long)bcount * blen) / secs);
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 = do_one_ahash_op(req, 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 = do_one_ahash_op(req, 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_common(const char *algo, unsigned int secs,
struct hash_speed *speed, unsigned mask)
{
struct scatterlist sg[TVMEMSIZE];
struct tcrypt_result tresult;
struct ahash_request *req;
struct crypto_ahash *tfm;
char *output;
int i, ret;
tfm = crypto_alloc_ahash(algo, 0, mask);
if (IS_ERR(tfm)) {
pr_err("failed to load transform for %s: %ld\n",
algo, PTR_ERR(tfm));
return;
}
printk(KERN_INFO "\ntesting speed of async %s (%s)\n", algo,
get_driver_name(crypto_ahash, tfm));
if (crypto_ahash_digestsize(tfm) > MAX_DIGEST_SIZE) {
pr_err("digestsize(%u) > %d\n", crypto_ahash_digestsize(tfm),
MAX_DIGEST_SIZE);
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);
output = kmalloc(MAX_DIGEST_SIZE, GFP_KERNEL);
if (!output)
goto out_nomem;
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 (secs)
ret = test_ahash_jiffies(req, speed[i].blen,
speed[i].plen, output, secs);
else
ret = test_ahash_cycles(req, speed[i].blen,
speed[i].plen, output);
if (ret) {
pr_err("hashing failed ret=%d\n", ret);
break;
}
}
kfree(output);
out_nomem:
ahash_request_free(req);
out:
crypto_free_ahash(tfm);
}
static void test_ahash_speed(const char *algo, unsigned int secs,
struct hash_speed *speed)
{
return test_ahash_speed_common(algo, secs, speed, 0);
}
static void test_hash_speed(const char *algo, unsigned int secs,
struct hash_speed *speed)
{
return test_ahash_speed_common(algo, secs, speed, CRYPTO_ALG_ASYNC);
}
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;
wait_for_completion(&tr->completion);
reinit_completion(&tr->completion);
ret = tr->err;
}
return ret;
}
static int test_acipher_jiffies(struct ablkcipher_request *req, int enc,
int blen, int secs)
{
unsigned long start, end;
int bcount;
int ret;
for (start = jiffies, end = start + secs * 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, secs, (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 secs,
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";
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;
}
pr_info("\ntesting speed of async %s (%s) %s\n", algo,
get_driver_name(crypto_ablkcipher, tfm), e);
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;
}
k = *keysize + *b_size;
sg_init_table(sg, DIV_ROUND_UP(k, PAGE_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);