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64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
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* Copyright 2014-2021 The GmSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* FIPS PUB 46-3 "Data Encryption Standard (DES)" */
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#ifndef GMSSL_DES_H
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#define GMSSL_DES_H
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#include <stdint.h>
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#include <stdlib.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DES_KEY_BITS 56
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#define DES_BLOCK_BITS 64
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#define DES_KEY_SIZE (DES_KEY_BITS/8)
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#define DES_BLOCK_SIZE (DES_BLOCK_BITS/8)
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#define DES_RK_BITS 48
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#define DES_RK_SIZE (DES_RK_BITS/8)
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#define DES_ROUNDS 16
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typedef struct {
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uint64_t rk[DES_ROUNDS];
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} DES_KEY;
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void des_set_encrypt_key(DES_KEY *key, const unsigned char user_key[8]);
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void des_set_decrypt_key(DES_KEY *key, const unsigned char user_key[8]);
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void des_encrypt(DES_KEY *key, const unsigned char in[8], unsigned char out[8]);
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typedef struct {
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DES_KEY K[3];
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} DES_EDE_KEY;
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void des_ede_set_encrypt_key(DES_EDE_KEY *key, const unsigned char user_key[24]);
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void des_ede_set_decrypt_key(DES_EDE_KEY *key, const unsigned char user_key[24]);
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void des_ede_encrypt(DES_EDE_KEY *key, const unsigned char in[8], unsigned char out[8]);
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#ifdef __cplusplus
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}
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#endif
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#endif
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