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/*
 * Copyright 2006-2016 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_CAMELLIA_H
# define HEADER_CAMELLIA_H

# include <openssl/opensslconf.h>

# ifndef OPENSSL_NO_CAMELLIA
# include <stddef.h>
#ifdef  __cplusplus
extern "C" {
#endif

# define CAMELLIA_ENCRYPT        1
# define CAMELLIA_DECRYPT        0

/*
 * Because array size can't be a const in C, the following two are macros.
 * Both sizes are in bytes.
 */

/* This should be a hidden type, but EVP requires that the size be known */

# define CAMELLIA_BLOCK_SIZE 16
# define CAMELLIA_TABLE_BYTE_LEN 272
# define CAMELLIA_TABLE_WORD_LEN (CAMELLIA_TABLE_BYTE_LEN / 4)

typedef unsigned int KEY_TABLE_TYPE[CAMELLIA_TABLE_WORD_LEN]; /* to match
                                                               * with WORD */

struct camellia_key_st {
    union {
        double d;               /* ensures 64-bit align */
        KEY_TABLE_TYPE rd_key;
    } u;
    int grand_rounds;
};
typedef struct camellia_key_st CAMELLIA_KEY;

int Camellia_set_key(const unsigned char *userKey, const int bits,
                     CAMELLIA_KEY *key);

void Camellia_encrypt(const unsigned char *in, unsigned char *out,
                      const CAMELLIA_KEY *key);
void Camellia_decrypt(const unsigned char *in, unsigned char *out,
                      const CAMELLIA_KEY *key);

void Camellia_ecb_encrypt(const unsigned char *in, unsigned char *out,
                          const CAMELLIA_KEY *key, const int enc);
void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out,
                          size_t length, const CAMELLIA_KEY *key,
                          unsigned char *ivec, const int enc);
void Camellia_cfb128_encrypt(const unsigned char *in, unsigned char *out,
                             size_t length, const CAMELLIA_KEY *key,
                             unsigned char *ivec, int *num, const int enc);
void Camellia_cfb1_encrypt(const unsigned char *in, unsigned char *out,
                           size_t length, const CAMELLIA_KEY *key,
                           unsigned char *ivec, int *num, const int enc);
void Camellia_cfb8_encrypt(const unsigned char *in, unsigned char *out,
                           size_t length, const CAMELLIA_KEY *key,
                           unsigned char *ivec, int *num, const int enc);
void Camellia_ofb128_encrypt(const unsigned char *in, unsigned char *out,
                             size_t length, const CAMELLIA_KEY *key,
                             unsigned char *ivec, int *num);
void Camellia_ctr128_encrypt(const unsigned char *in, unsigned char *out,
                             size_t length, const CAMELLIA_KEY *key,
                             unsigned char ivec[CAMELLIA_BLOCK_SIZE],
                             unsigned char ecount_buf[CAMELLIA_BLOCK_SIZE],
                             unsigned int *num);

# ifdef  __cplusplus
}
# endif
# endif

#endif

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✏️ camellia.h