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The C and C++ Include Header Files

cat -n /usr/include/openssl/rc5.h

     1	/*
     2	 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
     3	 *
     4	 * Licensed under the Apache License 2.0 (the "License").  You may not use
     5	 * this file except in compliance with the License.  You can obtain a copy
     6	 * in the file LICENSE in the source distribution or at
     7	 * https://www.openssl.org/source/license.html
     8	 */
     9	
    10	#ifndef OPENSSL_RC5_H
    11	#define OPENSSL_RC5_H
    12	#pragma once
    13	
    14	#include <openssl/macros.h>
    15	#ifndef OPENSSL_NO_DEPRECATED_3_0
    16	#define HEADER_RC5_H
    17	#endif
    18	
    19	#include <openssl/opensslconf.h>
    20	
    21	#ifndef OPENSSL_NO_RC5
    22	#ifdef __cplusplus
    23	extern "C" {
    24	#endif
    25	
    26	#define RC5_32_BLOCK 8
    27	#define RC5_32_KEY_LENGTH 16 /* This is a default, max is 255 */
    28	
    29	#ifndef OPENSSL_NO_DEPRECATED_3_0
    30	#define RC5_ENCRYPT 1
    31	#define RC5_DECRYPT 0
    32	
    33	#define RC5_32_INT unsigned int
    34	
    35	/*
    36	 * This are the only values supported.  Tweak the code if you want more The
    37	 * most supported modes will be RC5-32/12/16 RC5-32/16/8
    38	 */
    39	#define RC5_8_ROUNDS 8
    40	#define RC5_12_ROUNDS 12
    41	#define RC5_16_ROUNDS 16
    42	
    43	typedef struct rc5_key_st {
    44	    /* Number of rounds */
    45	    int rounds;
    46	    RC5_32_INT data[2 * (RC5_16_ROUNDS + 1)];
    47	} RC5_32_KEY;
    48	#endif
    49	#ifndef OPENSSL_NO_DEPRECATED_3_0
    50	OSSL_DEPRECATEDIN_3_0 int RC5_32_set_key(RC5_32_KEY *key, int len,
    51	    const unsigned char *data,
    52	    int rounds);
    53	OSSL_DEPRECATEDIN_3_0 void RC5_32_ecb_encrypt(const unsigned char *in,
    54	    unsigned char *out,
    55	    RC5_32_KEY *key,
    56	    int enc);
    57	OSSL_DEPRECATEDIN_3_0 void RC5_32_encrypt(unsigned long *data, RC5_32_KEY *key);
    58	OSSL_DEPRECATEDIN_3_0 void RC5_32_decrypt(unsigned long *data, RC5_32_KEY *key);
    59	OSSL_DEPRECATEDIN_3_0 void RC5_32_cbc_encrypt(const unsigned char *in,
    60	    unsigned char *out, long length,
    61	    RC5_32_KEY *ks, unsigned char *iv,
    62	    int enc);
    63	OSSL_DEPRECATEDIN_3_0 void RC5_32_cfb64_encrypt(const unsigned char *in,
    64	    unsigned char *out, long length,
    65	    RC5_32_KEY *schedule,
    66	    unsigned char *ivec, int *num,
    67	    int enc);
    68	OSSL_DEPRECATEDIN_3_0 void RC5_32_ofb64_encrypt(const unsigned char *in,
    69	    unsigned char *out, long length,
    70	    RC5_32_KEY *schedule,
    71	    unsigned char *ivec, int *num);
    72	#endif
    73	
    74	#ifdef __cplusplus
    75	}
    76	#endif
    77	#endif
    78	
    79	#endif