/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* DES & Triple DES EDE Cipher Algorithms.
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*/
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#ifndef __CRYPTO_DES_H
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#define __CRYPTO_DES_H
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#include <linux/types.h>
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#define DES_KEY_SIZE 8
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#define DES_EXPKEY_WORDS 32
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#define DES_BLOCK_SIZE 8
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#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE)
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#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS)
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#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE
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struct des_ctx {
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u32 expkey[DES_EXPKEY_WORDS];
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};
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struct des3_ede_ctx {
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u32 expkey[DES3_EDE_EXPKEY_WORDS];
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};
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void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
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void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
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void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);
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void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src);
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/**
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* des_expand_key - Expand a DES input key into a key schedule
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* @ctx: the key schedule
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* @key: buffer containing the input key
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* @len: size of the buffer contents
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*
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* Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if
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* the key is accepted but has been found to be weak.
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*/
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int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen);
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/**
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* des3_ede_expand_key - Expand a triple DES input key into a key schedule
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* @ctx: the key schedule
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* @key: buffer containing the input key
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* @len: size of the buffer contents
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*
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* Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if
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* the key is accepted but has been found to be weak. Note that weak keys will
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* be rejected (and -EINVAL will be returned) when running in FIPS mode.
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*/
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int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key,
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unsigned int keylen);
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#endif /* __CRYPTO_DES_H */
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