// SPDX-License-Identifier: GPL-2.0-or-later/* * Cryptographic API. * * DES & Triple DES EDE Cipher Algorithms. * * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no> */ #include <asm/byteorder.h>#include <crypto/algapi.h>#include <linux/bitops.h>#include <linux/init.h>#include <linux/module.h>#include <linux/errno.h> #include <crypto/internal/des.h> static int des_setkey(struct crypto_tfm *tfm, const u8 *key,		      unsigned int keylen){	struct des_ctx *dctx = crypto_tfm_ctx(tfm);	int err; 	err = des_expand_key(dctx, key, keylen);	if (err == -ENOKEY) {		if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)			err = -EINVAL;		else			err = 0;	}	if (err)		memset(dctx, 0, sizeof(*dctx));	return err;} static void crypto_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){	const struct des_ctx *dctx = crypto_tfm_ctx(tfm); 	des_encrypt(dctx, dst, src);} static void crypto_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){	const struct des_ctx *dctx = crypto_tfm_ctx(tfm); 	des_decrypt(dctx, dst, src);} static int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key,			   unsigned int keylen){	struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);	int err; 	err = des3_ede_expand_key(dctx, key, keylen);	if (err == -ENOKEY) {		if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)			err = -EINVAL;		else			err = 0;	}	if (err)		memset(dctx, 0, sizeof(*dctx));	return err;} static void crypto_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst,				    const u8 *src){	const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm); 	des3_ede_encrypt(dctx, dst, src);} static void crypto_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst,				    const u8 *src){	const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm); 	des3_ede_decrypt(dctx, dst, src);} static struct crypto_alg des_algs[2] = { {	.cra_name		=	"des",	.cra_driver_name	=	"des-generic",	.cra_priority		=	100,	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,	.cra_blocksize		=	DES_BLOCK_SIZE,	.cra_ctxsize		=	sizeof(struct des_ctx),	.cra_module		=	THIS_MODULE,	.cra_u			=	{ .cipher = {	.cia_min_keysize	=	DES_KEY_SIZE,	.cia_max_keysize	=	DES_KEY_SIZE,	.cia_setkey		=	des_setkey,	.cia_encrypt		=	crypto_des_encrypt,	.cia_decrypt		=	crypto_des_decrypt } }}, {	.cra_name		=	"des3_ede",	.cra_driver_name	=	"des3_ede-generic",	.cra_priority		=	100,	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,	.cra_blocksize		=	DES3_EDE_BLOCK_SIZE,	.cra_ctxsize		=	sizeof(struct des3_ede_ctx),	.cra_module		=	THIS_MODULE,	.cra_u			=	{ .cipher = {	.cia_min_keysize	=	DES3_EDE_KEY_SIZE,	.cia_max_keysize	=	DES3_EDE_KEY_SIZE,	.cia_setkey		=	des3_ede_setkey,	.cia_encrypt		=	crypto_des3_ede_encrypt,	.cia_decrypt		=	crypto_des3_ede_decrypt } }} }; static int __init des_generic_mod_init(void){	return crypto_register_algs(des_algs, ARRAY_SIZE(des_algs));} static void __exit des_generic_mod_fini(void){	crypto_unregister_algs(des_algs, ARRAY_SIZE(des_algs));} module_init(des_generic_mod_init);module_exit(des_generic_mod_fini); MODULE_LICENSE("GPL");MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");MODULE_AUTHOR("Dag Arne Osvik <da@osvik.no>");MODULE_ALIAS_CRYPTO("des");MODULE_ALIAS_CRYPTO("des-generic");MODULE_ALIAS_CRYPTO("des3_ede");MODULE_ALIAS_CRYPTO("des3_ede-generic");