• L
    Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 4d2fa8b4
    Linus Torvalds 提交于
    Pull crypto updates from Herbert Xu:
     "Here is the crypto update for 5.3:
    
      API:
       - Test shash interface directly in testmgr
       - cra_driver_name is now mandatory
    
      Algorithms:
       - Replace arc4 crypto_cipher with library helper
       - Implement 5 way interleave for ECB, CBC and CTR on arm64
       - Add xxhash
       - Add continuous self-test on noise source to drbg
       - Update jitter RNG
    
      Drivers:
       - Add support for SHA204A random number generator
       - Add support for 7211 in iproc-rng200
       - Fix fuzz test failures in inside-secure
       - Fix fuzz test failures in talitos
       - Fix fuzz test failures in qat"
    
    * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (143 commits)
      crypto: stm32/hash - remove interruptible condition for dma
      crypto: stm32/hash - Fix hmac issue more than 256 bytes
      crypto: stm32/crc32 - rename driver file
      crypto: amcc - remove memset after dma_alloc_coherent
      crypto: ccp - Switch to SPDX license identifiers
      crypto: ccp - Validate the the error value used to index error messages
      crypto: doc - Fix formatting of new crypto engine content
      crypto: doc - Add parameter documentation
      crypto: arm64/aes-ce - implement 5 way interleave for ECB, CBC and CTR
      crypto: arm64/aes-ce - add 5 way interleave routines
      crypto: talitos - drop icv_ool
      crypto: talitos - fix hash on SEC1.
      crypto: talitos - move struct talitos_edesc into talitos.h
      lib/scatterlist: Fix mapping iterator when sg->offset is greater than PAGE_SIZE
      crypto/NX: Set receive window credits to max number of CRBs in RxFIFO
      crypto: asymmetric_keys - select CRYPTO_HASH where needed
      crypto: serpent - mark __serpent_setkey_sbox noinline
      crypto: testmgr - dynamically allocate crypto_shash
      crypto: testmgr - dynamically allocate testvec_config
      crypto: talitos - eliminate unneeded 'done' functions at build time
      ...
    4d2fa8b4
arc4.c 1.8 KB
// 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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