BouncyCastle 密钥转换

转自: https://blog.csdn.net/a351945755/article/details/63707040

1. PKCS#8 转 PKCS#1

You will need BouncyCastle:

import org.bouncycastle.asn1.ASN1Encodable;

import org.bouncycastle.asn1.ASN1Primitive;

import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;

import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;

import org.bouncycastle.util.io.pem.PemObject;

import org.bouncycastle.util.io.pem.PemWriter;

The code snippets below have been checked and found working with Bouncy Castle 1.52.

Private key

Convert private key from PKCS8 to PKCS1:

PrivateKey priv = pair.getPrivate();

byte[] privBytes = priv.getEncoded();

PrivateKeyInfo pkInfo = PrivateKeyInfo.getInstance(privBytes);

ASN1Encodable encodable = pkInfo.parsePrivateKey();

ASN1Primitive primitive = encodable.toASN1Primitive();

byte[] privateKeyPKCS1 = primitive.getEncoded();

====>

//pkcs8Bytes contains PKCS#8 DER-encoded key as a byte[]

PrivateKeyInfo pki = PrivateKeyInfo.getInstance(encodeByte);

RSAPrivateKeyStructure pkcs1Key = RSAPrivateKeyStructure.getInstance(pki.getPrivateKey());

byte[] pkcs1Bytes = pkcs1Key.getEncoded();//etc.

Convert private key in PKCS1 to PEM:

PemObject pemObject = new PemObject("RSA PRIVATE KEY", privateKeyPKCS1);

StringWriter stringWriter = new StringWriter();

PemWriter pemWriter = new PemWriter(stringWriter);

pemWriter.writeObject(pemObject);

pemWriter.close();

String pemString = stringWriter.toString();

Check with command line OpenSSL that the key format is as expected:

openssl rsa -in rsa_private_key.pem -noout -text

2. PKCS#1 转 PKCS#8

//format PKCS#1 to PKCS#8

public static String formatPkcs1ToPkcs8(String rawKey) throws Exception {

    String result = null;

    //extract valid key content

    String validKey = RsaPemUtil.extractFromPem(rawKey);

    if(!Strings.isNullOrEmpty(validKey)) {

        //将BASE64编码的私钥字符串进行解码

        byte[] encodeByte = Base64.decodeBase64(validKey);

        AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PKCSObjectIdentifiers.pkcs8ShroudedKeyBag);    //PKCSObjectIdentifiers.pkcs8ShroudedKeyBag

        ASN1Object asn1Object = ASN1Object.fromByteArray(encodeByte);

        PrivateKeyInfo privKeyInfo = new PrivateKeyInfo(algorithmIdentifier, asn1Object);

        byte[] pkcs8Bytes = privKeyInfo.getEncoded();

        String type = "PRIVATE KEY";

        result = format2PemString(type, pkcs8Bytes);

    }

    return result;

}

Notice:

生成出来的代码与openssl转换的还是有点不一样，主要是第一行。可能是有些属性字段不同，但经测试上述代码转换产生的key也可以解码。

3. 完整代码

import java.io.IOException;

import java.io.StringReader;

import java.io.StringWriter;

import java.security.KeyFactory;

import java.security.PrivateKey;

import java.security.Security;

import java.security.interfaces.RSAPrivateCrtKey;

import java.security.spec.EncodedKeySpec;

import java.security.spec.InvalidKeySpecException;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.RSAPrivateKeySpec;

import java.util.List;

import org.bouncycastle.asn1.ASN1Encodable;

import org.bouncycastle.asn1.ASN1Object;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;

import org.bouncycastle.asn1.ASN1Primitive;

import org.bouncycastle.asn1.ASN1Sequence;

import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;

import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;

import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;

import org.bouncycastle.util.io.pem.PemObject;

import org.bouncycastle.util.io.pem.PemReader;

import org.bouncycastle.util.io.pem.PemWriter;

import org.bouncycastle.openssl.MiscPEMGenerator;

import org.bouncycastle.openssl.PKCS8Generator;

import com.ctrip.lzyan.test.cipher.cscm.RsaPemUtil;

import com.google.common.base.Joiner;

import com.google.common.base.Splitter;

import com.google.common.base.Strings;

import com.google.common.collect.Lists;

import org.apache.commons.codec.binary.Base64;

/**

 * Transform PKCS format

 *     PKCS#1    -> PKCS#8

 *     PKCS#8    -> PKCS#1

 *

 */

public class RsaPkcsTransformer {

    private static final String COMMENT_BEGIN_FLAG = "-----";

    private static final String RETURN_FLAG_R = "\r";

    private static final String RETURN_FLAG_N = "\n";

    //format PKCS#8 to PKCS#1

    public static String formatPkcs8ToPkcs1(String rawKey) throws Exception {

        String result = null;

        //extract valid key content

        String validKey = RsaPemUtil.extractFromPem(rawKey);

        if(!Strings.isNullOrEmpty(validKey)) {

            //将BASE64编码的私钥字符串进行解码

            byte[] encodeByte = Base64.decodeBase64(validKey);

            //==========

            //pkcs8Bytes contains PKCS#8 DER-encoded key as a byte[]

            PrivateKeyInfo pki = PrivateKeyInfo.getInstance(encodeByte);

            RSAPrivateKeyStructure pkcs1Key = RSAPrivateKeyStructure.getInstance(pki.getPrivateKey());

            byte[] pkcs1Bytes = pkcs1Key.getEncoded();//etc.

            //==========

            String type = "RSA PRIVATE KEY";

            result = format2PemString(type, pkcs1Bytes);

        }

        return result;

    }

    //format PKCS#1 to PKCS#8

    public static String formatPkcs1ToPkcs8(String rawKey) throws Exception {

        String result = null;

        //extract valid key content

        String validKey = RsaPemUtil.extractFromPem(rawKey);

        if(!Strings.isNullOrEmpty(validKey)) {

            //将BASE64编码的私钥字符串进行解码

            byte[] encodeByte = Base64.decodeBase64(validKey);

            AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PKCSObjectIdentifiers.pkcs8ShroudedKeyBag);    //PKCSObjectIdentifiers.pkcs8ShroudedKeyBag

            ASN1Object asn1Object = ASN1Object.fromByteArray(encodeByte);

            PrivateKeyInfo privKeyInfo = new PrivateKeyInfo(algorithmIdentifier, asn1Object);

            byte[] pkcs8Bytes = privKeyInfo.getEncoded();

            String type = "PRIVATE KEY";

            result = format2PemString(type, pkcs8Bytes);

        }

        return result;

    }

    // Write to pem file

    private static String format2PemString(String type, byte[] privateKeyPKCS1) throws Exception {

        PemObject pemObject = new PemObject(type, privateKeyPKCS1);

        StringWriter stringWriter = new StringWriter();

        PemWriter pemWriter = new PemWriter(stringWriter);

        pemWriter.writeObject(pemObject);

        pemWriter.close();

        String pemString = stringWriter.toString();

        return pemString;

    }

    //=== Testing ===

    public static void main(String[] args) throws Exception {

        String rawKey_pkcs1 = "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";

        String rawKey_pkcs8 = "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";

        //rawKey_pkcs1 = "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";

        String formatKey = formatPkcs1ToPkcs8(rawKey_pkcs1);

        //String formatKey = formatPkcs8ToPkcs1(rawKey_pkcs8);

        System.out.println(formatKey);    //expect: abcdef

    }

}

RsaPkcsTransformer

package com.ctrip.lzyan.test.element.rsa.sample4;

import java.security.Key;

import java.security.KeyFactory;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.PrivateKey;

import java.security.interfaces.RSAPrivateKey;

import java.security.interfaces.RSAPublicKey;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.RSAPrivateKeySpec;

import java.security.spec.X509EncodedKeySpec;

import java.util.HashMap;

import java.util.Map;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;

import org.bouncycastle.asn1.ASN1Sequence;

import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;

/**

 *

 * RSA+Base64加密解密工具类 RSA 一般用在数据传输过程中的加密和解密 先用RSA加密后是字节数组 再用BASE64加密 成字符串进行传输 测试

 * RSA1024产生的公钥字节长度在160-170之间 私钥长度在630-640之间 经过base64加密后长度 公钥字节产度在210-220之间

 * 私钥长度在840-850之间 所以数据库设计时如果存公钥长度设计varchar(256) 私钥长度varchar(1024)

 *

 */

public abstract class LzyanRSAUtilTest2 {

    public static final String KEY_ALGORITHM = "RSA";

    private static final String PUBLIC_KEY = "rsa_public_key";

    private static final String PRIVATE_KEY = "rsa_private_key";

    private static final String ENCODING = "UTF-8";

    /**

     *

     * 加密

     * 用公钥加密

     * @param content

     * @param base64PublicKeyStr

     * @return

     * @throws Exception

     */

    public static String encryptByPublicKey(String content, String base64PublicKeyStr) throws Exception {

        byte[] inputBytes = content.getBytes(ENCODING);

        byte[] outputBytes = encryptByPublicKey(inputBytes, base64PublicKeyStr);

        return Base64.encodeBase64String(outputBytes);

    }

    /**

     *

     * 加密

     *

     * 用私钥加密

     * @param content

     * @param base64PrivateKeyStr

     * @return

     * @throws Exception

     */

    public static String encryptByPrivateKey(String content, String base64PrivateKeyStr) throws Exception {

        byte[] inputBytes = content.getBytes(ENCODING);

        byte[] outputBytes = encryptByPrivateKey(inputBytes, base64PrivateKeyStr);

        return Base64.encodeBase64String(outputBytes);

    }

    /**

     *

     * 解密

     * 用公钥解密

     * @param content

     * @param base64PublicKeyStr

     * @return

     * @throws Exception

     */

    public static String decryptByPublicKey(String content, String base64PublicKeyStr) throws Exception {

        byte[] inputBytes = Base64.decodeBase64(content);

        byte[] outputBytes = decryptByPublicKey(inputBytes, base64PublicKeyStr);

        return new String(outputBytes, ENCODING);

    }

    /**

     *

     * 解密

     * 用私钥解密

     * @param content

     * @param privateKeyStr

     * @return

     * @throws Exception

     */

    public static String decryptByPrivateKey(String content, String base64PrivateKeyStr) throws Exception {

        byte[] inputBytes = Base64.decodeBase64(content);

        byte[] outputBytes = decryptByPrivateKey(inputBytes, base64PrivateKeyStr);

        return new String(outputBytes, ENCODING);

    }

    /**

     *

     * 加密

     * 用公钥加密

     * @param content

     * @param base64PublicKeyStr

     * @return

     * @throws Exception

     */

    public static byte[] encryptByPublicKey(byte[] content, String base64PublicKeyStr) throws Exception {

        // 对公钥解密

        byte[] publicKeyBytes = Base64.decodeBase64(base64PublicKeyStr);

        // 取得公钥

        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(publicKeyBytes);

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

        Key publicKey = keyFactory.generatePublic(x509KeySpec);

        // 对数据加密

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

        cipher.init(Cipher.ENCRYPT_MODE, publicKey);

        return cipher.doFinal(content);

    }

    /**

     *

     * 加密

     * 用私钥加密

     * @param content

     * @param base64PrivateKeyStr

     * @return

     * @throws Exception

     */

    public static byte[] encryptByPrivateKey(byte[] content, String base64PrivateKeyStr) throws Exception {

        // 对密钥解密

        byte[] privateKeyBytes = Base64.decodeBase64(base64PrivateKeyStr);

        // 取得私钥

        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);

        // 对数据加密

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

        cipher.init(Cipher.ENCRYPT_MODE, privateKey);

        return cipher.doFinal(content);

    }

    /**

     *

     * 解密

     * 用公钥解密

     * @param content

     * @param base64PublicKeyStr

     * @return

     * @throws Exception

     */

    public static byte[] decryptByPublicKey(byte[] content, String base64PublicKeyStr) throws Exception {

        // 对密钥解密

        byte[] publicKeyBytes = Base64.decodeBase64(base64PublicKeyStr);

        // 取得公钥

        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(publicKeyBytes);

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

        Key publicKey = keyFactory.generatePublic(x509KeySpec);

        // 对数据解密

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

        cipher.init(Cipher.DECRYPT_MODE, publicKey);

        return cipher.doFinal(content);

    }

    /**

     * 解密

     * 用私钥解密

     * @param content

     * @param privateKeyStr

     * @return

     * @throws Exception

     */

    public static byte[] decryptByPrivateKey(byte[] content, String base64PrivateKeyStr) throws Exception {

        // 对密钥解密

        byte[] privateKeyBytes = Base64.decodeBase64(base64PrivateKeyStr);   

        // 取得私钥  for PKCS#1

//        RSAPrivateKeyStructure asn1PrivKey = new RSAPrivateKeyStructure((ASN1Sequence) ASN1Sequence.fromByteArray(privateKeyBytes));

//        RSAPrivateKeySpec rsaPrivKeySpec = new RSAPrivateKeySpec(asn1PrivKey.getModulus(), asn1PrivKey.getPrivateExponent());

//        KeyFactory keyFactory= KeyFactory.getInstance("RSA");

//        PrivateKey priKey= keyFactory.generatePrivate(rsaPrivKeySpec);    

        // 取得私钥  for PKCS#8

        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

        Key priKey = keyFactory.generatePrivate(pkcs8KeySpec);

        // 对数据解密

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

        cipher.init(Cipher.DECRYPT_MODE, priKey);

        return cipher.doFinal(content);

    }

    /**

     *

     * 取得私钥

     * @param keyMap

     * @return

     * @throws Exception

     */

    public static String getBase64PrivateKeyStr(Map keyMap) throws Exception {

        Key key = (Key) keyMap.get(PRIVATE_KEY);

        return Base64.encodeBase64String(key.getEncoded());

    }

    /**

     *

     * 取得公钥

     *

     * @param keyMap

     * @return

     * @throws Exception

     */

    public static String getBase64PublicKeyStr(Map keyMap) throws Exception {

        Key key = (Key) keyMap.get(PUBLIC_KEY);

        return Base64.encodeBase64String(key.getEncoded());

    }

    /**

     *

     * 初始化密钥

     * @return

     * @throws Exception

     */

    public static Map initKey() throws Exception {

        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);

        keyPairGen.initialize(1024); // 初始化RSA1024安全些

        KeyPair keyPair = keyPairGen.generateKeyPair();

        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic(); // 公钥

        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate(); // 私钥

        Map keyMap = new HashMap(2);

        keyMap.put(PUBLIC_KEY, publicKey);

        keyMap.put(PRIVATE_KEY, privateKey);

        return keyMap;

    }

    private static void test() throws Exception {

        String pubKey =

                "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgDxka1U8SWI1vBY7pA1UiCVnr" +

                "dtSgE+PpyTqe2YSEWCgkYQ2YsohZwsaUao7nya7QnBgRiPKEHgS/Eey+L9iwo32S" +

                "n5fUwb0nJ1+JeXRA6JsDEKpONJojIbF2nfgHLWsNn4bzn5Webc6WZLx0GyLTQuZG" +

                "adFVuVq2dQqEsrq7HwIDAQAB";  

        String str = "123456";

        String content = encryptByPublicKey(str, pubKey);

        System.out.println(content);

        String priKey_pkcs1 = "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";

        String priKey_pkcs8_openssl = "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";

        String priKey_pkcs8_new = "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";

        String priKey = priKey_pkcs8_new;

        String output = decryptByPrivateKey(content, priKey);

        System.out.println(output);

     }

    // === Testing ===

    public static void main(String[] args) throws Exception {

        test();

    }

}

LzyanRSAUtilTest2

4. Java中使用PKCS#1秘钥

要引入一个bouncycastle包(bcprov-jdk16)，代码多几行。

<dependency>

       <groupId>org.bouncycastle</groupId>

       <artifactId>bcprov-jdk16</artifactId>

       <version>1.46</version>

</dependency>

// 取得私钥  for PKCS#1

RSAPrivateKeyStructure asn1PrivKey = new RSAPrivateKeyStructure((ASN1Sequence) ASN1Sequence.fromByteArray(privateKeyBytes));

RSAPrivateKeySpec rsaPrivKeySpec = new RSAPrivateKeySpec(asn1PrivKey.getModulus(), asn1PrivKey.getPrivateExponent());

KeyFactory keyFactory= KeyFactory.getInstance("RSA");

PrivateKey priKey= keyFactory.generatePrivate(rsaPrivKeySpec);    

// 取得私钥  for PKCS#8

PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

Key priKey = keyFactory.generatePrivate(pkcs8KeySpec);

BouncyCastle 密钥转换 - Java的更多相关文章

(转)C#与Java的证书密钥转换
前言最近由于项目需求,服务端由c#编写,客户端由java编写.通信数据使用RSA非对称加密.但是java和c#生成的密钥格式是不一样的,所以需要转换格式才可以正常使用.网上搜到使用java进行格式转 ...
Rsa加解密Java、C#、php通用代码密钥转换工具
之前发了一篇"TripleDes的加解密Java.C#.php通用代码",后面又有项目用到了Rsa加解密,还是在不同系统之间进行交互,Rsa在不同语言的密钥格式不一样,所以过程中主 ...
RSA的密钥把JAVA格式转换成C#的格式
RSA算法在C#与JAVA之前的交互在JAVA生成一对RSA私钥和公钥的时候,是以下的形式给到C#去调用: string publickey = @"MIGfMA0GCSqGSIb4DQE ...
RSA的密钥把JAVA格式转换成C#的格式(2)
把C#格式转换成Java:RSA的密钥把JAVA格式转换成C#的格式(1) 我已经在第一篇介绍过如何把C#格式转换成Java,现在来看看如何把Java格式转换成C#. /// <summary& ...
Atitit 跨平台异常处理(2)--------异常转换 -----java c# js异常对象结构比较and转换
Atitit 跨平台异常处理(2)--------异常转换 -----java c# js异常对象结构比较and转换 { "@type":"java.lang.Runti ...
paip.c++ 转换 java 解决方案
paip.c++ 转换 java 解决方案作者Attilax 艾龙, EMAIL:1466519819@qq.com 来源:attilax的专栏地址:http://blog.csdn.net/a ...
转换java keytools的keystore证书到OPENSSL的PEM格式文件
背景:原先业务使用的前端为haproxy,直接端口转发至tomcat,后端进行ssl连接,所以当时生成的步骤如下 ? 1 2 •生成密钥对:keytool -genkey -alias tomcat- ...
安卓、IOS端AEC密钥加密 Java端密钥解密通用实现（16进制表现形式）
由于业务需求,需要实现在客户端对重要信息进行加密,在服务端进行解密.客户端包括IOS和安卓的服务端位Java. 注意密钥需要保持一致,可以自己定义 . 安卓端加密代码: ============= ...
ffmpeg视频格式转换(Java)
命令: 高品质: ffmpeg -i E:\input\a.wmv -ab 128 -acodec libmp3lame -ac 1 -ar 22050 -r 29.97 -qscale 4 -y E ...

随机推荐

国内AR行业现状研究之百度的AR
AR(Augmented Reality),中文翻译增强现实.按我原来的知识体系,VR/AR的技术构成是相同的,只是追求的方向不同.VR是虚拟笼罩现实.让虚拟就是现实:AR则让虚拟进入现实.二者最终看 ...
[转]理解下DMA/NorFlash/DDR下的Burst是个什么概念
DMA传送不经过CPU的控制,假如硬盘的数据不能经过DMA控制器读到内存,那么每完成一次将硬盘的数据读出来,再存放到内存的操作,都要通过CPU运行几条读写指令来完成,这时CPU就做不了别的事了,如果有 ...
CEO退休
早上刚来公司就收到群发邮件,说CEO退休了,在公司服务了22年.以后还是会part time做vice chairman.其实在公司也没打过几次照面...就知道是个和善的老人,祝他退休生活幸福! 我的 ...
MongoDB随笔3：使用索引
创建索引的语句很简单. 1.单键索引的创建:db.test.ensureIndex({name:1},{name:'index_name'}) 2.复合索引的创建:db.test.ensureInde ...
Java知多少（104）网络编程之统一资源定位符URL
统一资源定位符URL(Uniform Resource Locator)是www客户机访问Internet时用来标识资源的名字和地址.超文本链路由统一资源定位符URL维持.URL的格式是: <M ...
MYSQL + MHA +keepalive + VIP安装配置(一)--MYSQL安装配置
一.总概: 本文介绍了MySQL高可用性的实现方案MHA,MHA由Node和Manager组成,Node运行在每一台MySQL服务器上,不管是MySQL主服务器,还是MySQL从服务器,都要安装Nod ...
RDP 数据库简介
在扩增子数据分析中,有时会发现多个OTU 注释到了同一个species , 为什么会出现这种情况呢? 首先既然在OTU水平能分开,说明序列的相似度小于97%, 同一个物种的同一个基因的片段相似度会 ...
jstat 简介
1. jstat -gc pid 可以显示gc的信息,查看gc的次数,及时间. 其中最后五项,分别是young gc的次数,young gc的时间,full gc的次数,full gc的时间,gc ...
配置nginx实现windows/iis应用负载均衡
nginx是俄罗斯人开发的一款跨平台的高性能HTTP和反向代理服务器,可以利用它实现web应用服务器的负载均衡. 反向代理是指将用户请求通过代理服务器转发给后端内部网络的应用服务器,典型的应用比如配置 ...
ElasticSearch5.X的冷热数据架构
转载:https://my.oschina.net/xiaomaijiang/blog/826701 当使用ElasticSearch做大规模的时序数据分析的时候,我们建议使用基于时序的索引并且采用3 ...

BouncyCastle 密钥转换 - Java

Private key

BouncyCastle 密钥转换 - Java的更多相关文章

随机推荐

热门专题