crypto/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 <jmorris@intercode.com.au>
 * Copyright (c) 2002 Jean-Francois Dive <jef@linuxbe.org>
 * Copyright (c) 2007 Nokia Siemens Networks
 *
 * Updated RFC4106 AES-GCM testing.
 *    Authors: Aidan O'Mahony (aidan.o.mahony@intel.com)
 *             Adrian Hoban <adrian.hoban@intel.com>
 *             Gabriele Paoloni <gabriele.paoloni@intel.com>
 *             Tadeusz Struk (tadeusz.struk@intel.com)
 *             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.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <crypto/aead.h>
#include <crypto/hash.h>
#include <crypto/skcipher.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 u32 num_mb = 8;
static char *tvmem[TVMEMSIZE];

static char *check[] = {
	"des", "md5", "des3_ede", "rot13", "sha1", "sha224", "sha256", "sm3",
	"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", "sha3-224", "sha3-256", "sha3-384", "sha3-512",
	"streebog256", "streebog512",
	NULL
};

static u32 block_sizes[] = { 16, 64, 256, 1024, 1472, 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, const void *assoc,
			 unsigned int aad_size)
{
	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);

	sg_set_buf(&sg[0], assoc, aad_size);

	if (rem)
		np--;
	for (k = 0; k < np; k++)
		sg_set_buf(&sg[k + 1], xbuf[k], PAGE_SIZE);

	if (rem)
		sg_set_buf(&sg[k + 1], xbuf[k], rem);
}

static inline int do_one_aead_op(struct aead_request *req, int ret)
{
	struct crypto_wait *wait = req->base.data;

	return crypto_wait_req(ret, wait);
}

struct test_mb_aead_data {
	struct scatterlist sg[XBUFSIZE];
	struct scatterlist sgout[XBUFSIZE];
	struct aead_request *req;
	struct crypto_wait wait;
	char *xbuf[XBUFSIZE];
	char *xoutbuf[XBUFSIZE];
	char *axbuf[XBUFSIZE];
};

static int do_mult_aead_op(struct test_mb_aead_data *data, int enc,
				u32 num_mb, int *rc)
{
	int i, err = 0;

	/* Fire up a bunch of concurrent requests */
	for (i = 0; i < num_mb; i++) {
		if (enc == ENCRYPT)
			rc[i] = crypto_aead_encrypt(data[i].req);
		else
			rc[i] = crypto_aead_decrypt(data[i].req);
	}

	/* Wait for all requests to finish */
	for (i = 0; i < num_mb; i++) {
		rc[i] = crypto_wait_req(rc[i], &data[i].wait);

		if (rc[i]) {
			pr_info("concurrent request %d error %d\n", i, rc[i]);
			err = rc[i];
		}
	}

	return err;
}

static int test_mb_aead_jiffies(struct test_mb_aead_data *data, int enc,
				int blen, int secs, u32 num_mb)
{
	unsigned long start, end;
	int bcount;
	int ret = 0;
	int *rc;

	rc = kcalloc(num_mb, sizeof(*rc), GFP_KERNEL);
	if (!rc)
		return -ENOMEM;

	for (start = jiffies, end = start + secs * HZ, bcount = 0;
	     time_before(jiffies, end); bcount++) {
		ret = do_mult_aead_op(data, enc, num_mb, rc);
		if (ret)
			goto out;
	}

	pr_cont("%d operations in %d seconds (%ld bytes)\n",
		bcount * num_mb, secs, (long)bcount * blen * num_mb);

out:
	kfree(rc);
	return ret;
}

static int test_mb_aead_cycles(struct test_mb_aead_data *data, int enc,
			       int blen, u32 num_mb)
{
	unsigned long cycles = 0;
	int ret = 0;
	int i;
	int *rc;

	rc = kcalloc(num_mb, sizeof(*rc), GFP_KERNEL);
	if (!rc)
		return -ENOMEM;

	/* Warm-up run. */
	for (i = 0; i < 4; i++) {
		ret = do_mult_aead_op(data, enc, num_mb, rc);
		if (ret)
			goto out;
	}

	/* The real thing. */
	for (i = 0; i < 8; i++) {
		cycles_t start, end;

		start = get_cycles();
		ret = do_mult_aead_op(data, enc, num_mb, rc);
		end = get_cycles();

		if (ret)
			goto out;

		cycles += end - start;
	}

	pr_cont("1 operation in %lu cycles (%d bytes)\n",
		(cycles + 4) / (8 * num_mb), blen);

out:
	kfree(rc);
	return ret;
}

static void test_mb_aead_speed(const char *algo, int enc, int secs,
			       struct aead_speed_template *template,
			       unsigned int tcount, u8 authsize,
			       unsigned int aad_size, u8 *keysize, u32 num_mb)
{
	struct test_mb_aead_data *data;
	struct crypto_aead *tfm;
	unsigned int i, j, iv_len;
	const char *key;
	const char *e;
	void *assoc;
	u32 *b_size;
	char *iv;
	int ret;


	if (aad_size >= PAGE_SIZE) {
		pr_err("associate data length (%u) too big\n", aad_size);
		return;
	}

	iv = kzalloc(MAX_IVLEN, GFP_KERNEL);
	if (!iv)
		return;

	if (enc == ENCRYPT)
		e = "encryption";
	else
		e = "decryption";

	data = kcalloc(num_mb, sizeof(*data), GFP_KERNEL);
	if (!data)
		goto out_free_iv;

	tfm = crypto_alloc_aead(algo, 0, 0);
	if (IS_ERR(tfm)) {
		pr_err("failed to load transform for %s: %ld\n",
			algo, PTR_ERR(tfm));
		goto out_free_data;
	}

	ret = crypto_aead_setauthsize(tfm, authsize);

	for (i = 0; i < num_mb; ++i)
		if (testmgr_alloc_buf(data[i].xbuf)) {
			while (i--)
				testmgr_free_buf(data[i].xbuf);
			goto out_free_tfm;
		}

	for (i = 0; i < num_mb; ++i)
		if (testmgr_alloc_buf(data[i].axbuf)) {
			while (i--)
				testmgr_free_buf(data[i].axbuf);
			goto out_free_xbuf;
		}

	for (i = 0; i < num_mb; ++i)
		if (testmgr_alloc_buf(data[i].xoutbuf)) {
			while (i--)
				testmgr_free_buf(data[i].xoutbuf);
			goto out_free_axbuf;
		}

	for (i = 0; i < num_mb; ++i) {
		data[i].req = aead_request_alloc(tfm, GFP_KERNEL);
		if (!data[i].req) {
			pr_err("alg: skcipher: Failed to allocate request for %s\n",
			       algo);
			while (i--)
				aead_request_free(data[i].req);
			goto out_free_xoutbuf;
		}
	}

	for (i = 0; i < num_mb; ++i) {
		crypto_init_wait(&data[i].wait);
		aead_request_set_callback(data[i].req,
					  CRYPTO_TFM_REQ_MAY_BACKLOG,
					  crypto_req_done, &data[i].wait);
	}

	pr_info("\ntesting speed of multibuffer %s (%s) %s\n", algo,
		get_driver_name(crypto_aead, tfm), e);

	i = 0;
	do {
		b_size = aead_sizes;
		do {
			if (*b_size + authsize > XBUFSIZE * PAGE_SIZE) {
				pr_err("template (%u) too big for buffer (%lu)\n",
				       authsize + *b_size,
				       XBUFSIZE * PAGE_SIZE);
				goto out;
			}

			pr_info("test %u (%d bit key, %d byte blocks): ", i,
				*keysize * 8, *b_size);

			/* Set up tfm global state, i.e. the key */

			memset(tvmem[0], 0xff, PAGE_SIZE);
			key = tvmem[0];
			for (j = 0; j < tcount; j++) {
				if (template[j].klen == *keysize) {
					key = template[j].key;
					break;
				}
			}

			crypto_aead_clear_flags(tfm, ~0);

			ret = crypto_aead_setkey(tfm, key, *keysize);
			if (ret) {
				pr_err("setkey() failed flags=%x\n",
				       crypto_aead_get_flags(tfm));
				goto out;
			}

			iv_len = crypto_aead_ivsize(tfm);
			if (iv_len)
				memset(iv, 0xff, iv_len);

			/* Now setup per request stuff, i.e. buffers */

			for (j = 0; j < num_mb; ++j) {
				struct test_mb_aead_data *cur = &data[j];

				assoc = cur->axbuf[0];
				memset(assoc, 0xff, aad_size);

				sg_init_aead(cur->sg, cur->xbuf,
					     *b_size + (enc ? 0 : authsize),
					     assoc, aad_size);

				sg_init_aead(cur->sgout, cur->xoutbuf,
					     *b_size + (enc ? authsize : 0),
					     assoc, aad_size);

				aead_request_set_ad(cur->req, aad_size);

				if (!enc) {

					aead_request_set_crypt(cur->req,
							       cur->sgout,
							       cur->sg,
							       *b_size, iv);
					ret = crypto_aead_encrypt(cur->req);
					ret = do_one_aead_op(cur->req, ret);

					if (ret) {
						pr_err("calculating auth failed failed (%d)\n",
						       ret);
						break;
					}
				}

				aead_request_set_crypt(cur->req, cur->sg,
						       cur->sgout, *b_size +
						       (enc ? 0 : authsize),
						       iv);

			}

			if (secs) {
				ret = test_mb_aead_jiffies(data, enc, *b_size,
							   secs, num_mb);
				cond_resched();
			} else {
				ret = test_mb_aead_cycles(data, enc, *b_size,
							  num_mb);
			}

			if (ret) {
				pr_err("%s() failed return code=%d\n", e, ret);
				break;
			}
			b_size++;
			i++;
		} while (*b_size);
		keysize++;
	} while (*keysize);

out:
	for (i = 0; i < num_mb; ++i)
		aead_request_free(data[i].req);
out_free_xoutbuf:
	for (i = 0; i < num_mb; ++i)
		testmgr_free_buf(data[i].xoutbuf);
out_free_axbuf:
	for (i = 0; i < num_mb; ++i)
		testmgr_free_buf(data[i].axbuf);
out_free_xbuf:
	for (i = 0; i < num_mb; ++i)
		testmgr_free_buf(data[i].xbuf);
out_free_tfm:
	crypto_free_aead(tfm);
out_free_data:
	kfree(data);
out_free_iv:
	kfree(iv);
}

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;

	/* 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:
	if (ret == 0)
		printk("1 operation in %lu cycles (%d bytes)\n",
		       (cycles + 4) / 8, blen);

	return ret;
}

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 crypto_wait wait;

	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;