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✏️ blowfish.h

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/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef HEADER_BLOWFISH_H
# define HEADER_BLOWFISH_H

# include <openssl/opensslconf.h>

# ifndef OPENSSL_NO_BF
# include <openssl/e_os2.h>
# ifdef  __cplusplus
extern "C" {
# endif

# define BF_ENCRYPT      1
# define BF_DECRYPT      0

/*-
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 * ! BF_LONG has to be at least 32 bits wide.                     !
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 */
# define BF_LONG unsigned int

# define BF_ROUNDS       16
# define BF_BLOCK        8

typedef struct bf_key_st {
    BF_LONG P[BF_ROUNDS + 2];
    BF_LONG S[4 * 256];
} BF_KEY;

void BF_set_key(BF_KEY *key, int len, const unsigned char *data);

void BF_encrypt(BF_LONG *data, const BF_KEY *key);
void BF_decrypt(BF_LONG *data, const BF_KEY *key);

void BF_ecb_encrypt(const unsigned char *in, unsigned char *out,
                    const BF_KEY *key, int enc);
void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
                    const BF_KEY *schedule, unsigned char *ivec, int enc);
void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out,
                      long length, const BF_KEY *schedule,
                      unsigned char *ivec, int *num, int enc);
void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out,
                      long length, const BF_KEY *schedule,
                      unsigned char *ivec, int *num);
const char *BF_options(void);

# ifdef  __cplusplus
}
# endif
# endif

#endif

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✏️ blowfish.h