testmgr.c

/*
 * Algorithm testing framework and tests.
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 * Copyright (c) 2002 Jean-Francois Dive <jef@linuxbe.org>
 * Copyright (c) 2007 Nokia Siemens Networks
 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * 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.
 *
 */

#include <crypto/hash.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <crypto/rng.h>

#include "internal.h"

#ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS

/* a perfect nop */
int alg_test(const char *driver, const char *alg, u32 type, u32 mask)
{
	return 0;
}

#else

#include "testmgr.h"

/*
 * Need slab memory for testing (size in number of pages).
 */
#define XBUFSIZE	8

/*
 * 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;
};

struct aead_test_suite {
	struct {
		struct aead_testvec *vecs;
		unsigned int count;
	} enc, dec;
};

struct cipher_test_suite {
	struct {
		struct cipher_testvec *vecs;
		unsigned int count;
	} enc, dec;
};

struct comp_test_suite {
	struct {
		struct comp_testvec *vecs;
		unsigned int count;
	} comp, decomp;
};

struct pcomp_test_suite {
	struct {
		struct pcomp_testvec *vecs;
		unsigned int count;
	} comp, decomp;
};

struct hash_test_suite {
	struct hash_testvec *vecs;
	unsigned int count;
};

struct cprng_test_suite {
	struct cprng_testvec *vecs;
	unsigned int count;
};

struct alg_test_desc {
	const char *alg;
	int (*test)(const struct alg_test_desc *desc, const char *driver,
		    u32 type, u32 mask);
	int fips_allowed;	/* set if alg is allowed in fips mode */

	union {
		struct aead_test_suite aead;
		struct cipher_test_suite cipher;
		struct comp_test_suite comp;
		struct pcomp_test_suite pcomp;
		struct hash_test_suite hash;
		struct cprng_test_suite cprng;
	} suite;
};

static unsigned int IDX[8] = { IDX1, IDX2, IDX3, IDX4, IDX5, IDX6, IDX7, IDX8 };

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 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 int do_one_async_hash_op(struct ahash_request *req,
				struct tcrypt_result *tr,
				int ret)
{
	if (ret == -EINPROGRESS || ret == -EBUSY) {
		ret = wait_for_completion_interruptible(&tr->completion);
		if (!ret)
			ret = tr->err;
		INIT_COMPLETION(tr->completion);
	}
	return ret;
}

static int test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
		     unsigned int tcount, bool use_digest)
{
	const char *algo = crypto_tfm_alg_driver_name(crypto_ahash_tfm(tfm));
	unsigned int i, j, k, temp;
	struct scatterlist sg[8];
	char result[64];
	struct ahash_request *req;
	struct tcrypt_result tresult;
	void *hash_buff;
	char *xbuf[XBUFSIZE];
	int ret = -ENOMEM;

	if (testmgr_alloc_buf(xbuf))