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1/* SPDX-License-Identifier: GPL-2.0 */2/* 3 * DES & Triple DES EDE Cipher Algorithms.4 */5 6#ifndef __CRYPTO_DES_H7#define __CRYPTO_DES_H8 9#include <linux/types.h>10 11#define DES_KEY_SIZE 812#define DES_EXPKEY_WORDS 3213#define DES_BLOCK_SIZE 814 15#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE)16#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS)17#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE18 19struct des_ctx {20 u32 expkey[DES_EXPKEY_WORDS];21};22 23struct des3_ede_ctx {24 u32 expkey[DES3_EDE_EXPKEY_WORDS];25};26 27void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);28void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);29 30void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);31void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);32 33/**34 * des_expand_key - Expand a DES input key into a key schedule35 * @ctx: the key schedule36 * @key: buffer containing the input key37 * @len: size of the buffer contents38 *39 * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if40 * the key is accepted but has been found to be weak.41 */42int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen);43 44/**45 * des3_ede_expand_key - Expand a triple DES input key into a key schedule46 * @ctx: the key schedule47 * @key: buffer containing the input key48 * @len: size of the buffer contents49 *50 * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if51 * the key is accepted but has been found to be weak. Note that weak keys will52 * be rejected (and -EINVAL will be returned) when running in FIPS mode.53 */54int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key,55 unsigned int keylen);56 57#endif /* __CRYPTO_DES_H */58