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Revision 0baca070068c58b95e342881d9da4840d5cf3bd1 authored by Linus Torvalds on 22 September 2020, 21:36:50 UTC, committed by Linus Torvalds on 22 September 2020, 21:36:50 UTC 
Merge tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-block
 
Pull io_uring fixes from Jens Axboe:
 "A few fixes - most of them regression fixes from this cycle, but also
  a few stable heading fixes, and a build fix for the included demo tool
  since some systems now actually have gettid() available"

* tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-block:
  io_uring: fix openat/openat2 unified prep handling
  io_uring: mark statx/files_update/epoll_ctl as non-SQPOLL
  tools/io_uring: fix compile breakage
  io_uring: don't use retry based buffered reads for non-async bdev
  io_uring: don't re-setup vecs/iter in io_resumit_prep() is already there
  io_uring: don't run task work on an exiting task
  io_uring: drop 'ctx' ref on task work cancelation
  io_uring: grab any needed state during defer prep
2 parent s c37b718 + 4eb8dde
Raw File
arc4.c 
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Cryptographic API
 *
 * ARC4 Cipher Algorithm
 *
 * Jon Oberheide <jon@oberheide.org>
 */

#include <crypto/algapi.h>
#include <crypto/arc4.h>
#include <crypto/internal/skcipher.h>
#include <linux/init.h>
#include <linux/module.h>

static int crypto_arc4_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
			      unsigned int key_len)
{
	struct arc4_ctx *ctx = crypto_skcipher_ctx(tfm);

	return arc4_setkey(ctx, in_key, key_len);
}

static int crypto_arc4_crypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct arc4_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while (walk.nbytes > 0) {
		arc4_crypt(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			   walk.nbytes);
		err = skcipher_walk_done(&walk, 0);
	}

	return err;
}

static struct skcipher_alg arc4_alg = {
	/*
	 * For legacy reasons, this is named "ecb(arc4)", not "arc4".
	 * Nevertheless it's actually a stream cipher, not a block cipher.
	 */
	.base.cra_name		=	"ecb(arc4)",
	.base.cra_driver_name	=	"ecb(arc4)-generic",
	.base.cra_priority	=	100,
	.base.cra_blocksize	=	ARC4_BLOCK_SIZE,
	.base.cra_ctxsize	=	sizeof(struct arc4_ctx),
	.base.cra_module	=	THIS_MODULE,
	.min_keysize		=	ARC4_MIN_KEY_SIZE,
	.max_keysize		=	ARC4_MAX_KEY_SIZE,
	.setkey			=	crypto_arc4_setkey,
	.encrypt		=	crypto_arc4_crypt,
	.decrypt		=	crypto_arc4_crypt,
};

static int __init arc4_init(void)
{
	return crypto_register_skcipher(&arc4_alg);
}

static void __exit arc4_exit(void)
{
	crypto_unregister_skcipher(&arc4_alg);
}

subsys_initcall(arc4_init);
module_exit(arc4_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ARC4 Cipher Algorithm");
MODULE_AUTHOR("Jon Oberheide <jon@oberheide.org>");
MODULE_ALIAS_CRYPTO("ecb(arc4)");
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