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/* SPDX-License-Identifier: GPL-2.0 */
/*
* DES & Triple DES EDE Cipher Algorithms.
*/
#ifndef __CRYPTO_DES_H
#define __CRYPTO_DES_H
#include <linux/types.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
struct des_ctx {
u32 expkey[DES_EXPKEY_WORDS];
};
struct des3_ede_ctx {
u32 expkey[DES3_EDE_EXPKEY_WORDS];
};
void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);
void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);
/**
* des_expand_key - Expand a DES input key into a key schedule
* @ctx: the key schedule
* @key: buffer containing the input key
* @len: size of the buffer contents
*
* Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if
* the key is accepted but has been found to be weak.
*/
int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen);
/**
* des3_ede_expand_key - Expand a triple DES input key into a key schedule
* @ctx: the key schedule
* @key: buffer containing the input key
* @len: size of the buffer contents
*
* Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if
* the key is accepted but has been found to be weak. Note that weak keys will
* be rejected (and -EINVAL will be returned) when running in FIPS mode.
*/
int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key,
unsigned int keylen);
#endif /* __CRYPTO_DES_H */