/* SPDX-License-Identifier: GPL-2.0 *//*  * DES & Triple DES EDE Cipher Algorithms. */ #ifndef __CRYPTO_DES_H#define __CRYPTO_DES_H #include <crypto/skcipher.h>#include <linux/compiler.h>#include <linux/fips.h>#include <linux/string.h> #define DES_KEY_SIZE		8#define DES_EXPKEY_WORDS	32#define DES_BLOCK_SIZE		8 #define DES3_EDE_KEY_SIZE	(3 * DES_KEY_SIZE)#define DES3_EDE_EXPKEY_WORDS	(3 * DES_EXPKEY_WORDS)#define DES3_EDE_BLOCK_SIZE	DES_BLOCK_SIZE static inline int __des3_verify_key(u32 *flags, const u8 *key){	int err = -EINVAL;	u32 K[6]; 	memcpy(K, key, DES3_EDE_KEY_SIZE); 	if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||		     !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&		     (fips_enabled ||		      (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)))		goto bad; 	if (unlikely(!((K[0] ^ K[4]) | (K[1] ^ K[5]))) && fips_enabled)		goto bad; 	err = 0; out:	memzero_explicit(K, DES3_EDE_KEY_SIZE); 	return err; bad:	*flags |= CRYPTO_TFM_RES_WEAK_KEY;	goto out;} static inline int des3_verify_key(struct crypto_skcipher *tfm, const u8 *key){	u32 flags;	int err; 	flags = crypto_skcipher_get_flags(tfm);	err = __des3_verify_key(&flags, key);	crypto_skcipher_set_flags(tfm, flags);	return err;} extern unsigned long des_ekey(u32 *pe, const u8 *k); extern int __des3_ede_setkey(u32 *expkey, u32 *flags, const u8 *key,			     unsigned int keylen); #endif /* __CRYPTO_DES_H */