晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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/*
 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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 OPENSSL_BLOWFISH_H
#define OPENSSL_BLOWFISH_H
#pragma once

#include <openssl/macros.h>
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define HEADER_BLOWFISH_H
#endif

#include <openssl/opensslconf.h>

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

#define BF_BLOCK 8

#ifndef OPENSSL_NO_DEPRECATED_3_0

#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

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

#endif /* OPENSSL_NO_DEPRECATED_3_0 */
#ifndef OPENSSL_NO_DEPRECATED_3_0
OSSL_DEPRECATEDIN_3_0 void BF_set_key(BF_KEY *key, int len,
    const unsigned char *data);
OSSL_DEPRECATEDIN_3_0 void BF_encrypt(BF_LONG *data, const BF_KEY *key);
OSSL_DEPRECATEDIN_3_0 void BF_decrypt(BF_LONG *data, const BF_KEY *key);
OSSL_DEPRECATEDIN_3_0 void BF_ecb_encrypt(const unsigned char *in,
    unsigned char *out, const BF_KEY *key,
    int enc);
OSSL_DEPRECATEDIN_3_0 void BF_cbc_encrypt(const unsigned char *in,
    unsigned char *out, long length,
    const BF_KEY *schedule,
    unsigned char *ivec, int enc);
OSSL_DEPRECATEDIN_3_0 void BF_cfb64_encrypt(const unsigned char *in,
    unsigned char *out,
    long length, const BF_KEY *schedule,
    unsigned char *ivec, int *num,
    int enc);
OSSL_DEPRECATEDIN_3_0 void BF_ofb64_encrypt(const unsigned char *in,
    unsigned char *out,
    long length, const BF_KEY *schedule,
    unsigned char *ivec, int *num);
OSSL_DEPRECATEDIN_3_0 const char *BF_options(void);
#endif

#ifdef __cplusplus
}
#endif
#endif

#endif