two-way-ssl需要12次握手（除去TCP的三次握手），如下圖：

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雙向認證過程：

1.客戶端發送ClientHello消息，告訴服務端要使用SSL。

2.客戶端發送ServerHello的響應，告訴客戶端使用SSL。

3.服務端發送證書給客戶端；

4.服務端發送發送數據，要求客戶端發送證書；

5.此時客戶端與服務端招呼已經結束；

6.客戶端發送自己的證書給服務端（客戶端認證服務端證書成功）；

7.客戶端發送session key（使用服務端公鑰加密）；

8.客戶端發送一個CertificateVerify消息讓服務器知道它擁有發送證書；

9.客戶端發送自己支持的通道加密套給服務端；

10.客戶端要服務端從中選著一個；

11.服務端選擇一個加密套，并且告訴客戶端，我選擇了這個；

12.服務端發送認證完成。

使用keytool生成證書：

keytool -genkeypair -alias client-app -keyalg RSA -keysize 2048 -storetype JKS -keystore client-app.jks -validity 3650 -ext SAN=dns:localhost,ip:127.0.0.1 keytool -genkeypair -alias server-app -keyalg RSA -keysize 2048 -storetype JKS -keystore server-app.jks -validity 3650 -ext SAN=dns:localhost,ip:127.0.0.1 keytool -export -alias client-app -file client-app.crt -keystore client-app.jks keytool -export -alias server-app -file server-app.crt -keystore server-app.jks keytool -import -alias server-app -file server-app.crt -keystore client-app.jks keytool -import -alias client-app -file client-app.crt -keystore server-app.jks

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下面使用Spring Boot進行SSL雙向認證

程序結構如下：

關鍵代碼：

服務端

application.properties

spring.application.name=server-appserver.port=9002 server.ssl.enabled=true server.ssl.client-auth=need server.ssl.key-store=classpath:server-app.jks server.ssl.key-store-password=server-app server.ssl.key-alias=server-app server.ssl.key-store-type=JKS server.ssl.key-store-provider=SUN server.ssl.trust-store=classpath:server-app.jks server.ssl.trust-store-password=server-app server.ssl.trust-store-type=JKS

Controller.java

package cn.server;import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;@RestController @RequestMapping("/server-app") public class Controller {@GetMapping("/data")public String getData(){System.out.println("Returning data from server-app data method");return "Hello from Server-App-data method";} }

客戶端

application.properties

spring.application.name=client-appserver.port=9001 server.ssl.enabled=true server.ssl.client-auth=need server.ssl.key-store=classpath:client-app.jks server.ssl.key-store-password=client-app server.ssl.key-alias=client-app server.ssl.key-store-type=JKS server.ssl.key-store-provider=SUN server.ssl.trust-store=classpath:client-app.jks server.ssl.trust-store-password=client-app server.ssl.trust-store-type=JKSendpoint.server-app=https://localhost:9002/server-app/data

ClientMain.java

package cn.client;import org.apache.http.client.HttpClient; import org.apache.http.conn.ssl.NoopHostnameVerifier; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.conn.ssl.TrustSelfSignedStrategy; import org.apache.http.impl.client.HttpClients; import org.apache.http.ssl.SSLContextBuilder; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.CommandLineRunner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; import org.springframework.core.io.ClassPathResource; import org.springframework.http.client.HttpComponentsClientHttpRequestFactory; import org.springframework.web.client.RestTemplate;import java.io.InputStream; import java.net.URI; import java.security.KeyStore;@SpringBootApplication public class ClientMain implements CommandLineRunner {@AutowiredRestTemplate restTemplate;@Value("${endpoint.server-app}")private String msEndpoint;@Beanpublic RestTemplate getRestTemplate(){RestTemplate restTemplate = new RestTemplate();KeyStore keyStore;HttpComponentsClientHttpRequestFactory requestFactory = null;try {keyStore = KeyStore.getInstance("jks");ClassPathResource classPathResource = new ClassPathResource("client-app.jks");InputStream inputStream = classPathResource.getInputStream();keyStore.load(inputStream, "client-app".toCharArray());SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(new SSLContextBuilder().loadTrustMaterial(null, new TrustSelfSignedStrategy()).loadKeyMaterial(keyStore, "client-app".toCharArray()).build(),NoopHostnameVerifier.INSTANCE);HttpClient httpClient = HttpClients.custom().setSSLSocketFactory(socketFactory).setMaxConnTotal(Integer.valueOf(5)).setMaxConnPerRoute(Integer.valueOf(5)).build();requestFactory = new HttpComponentsClientHttpRequestFactory(httpClient);requestFactory.setReadTimeout(Integer.valueOf(10000));requestFactory.setConnectTimeout(Integer.valueOf(10000));restTemplate.setRequestFactory(requestFactory);}catch (Exception exception) {System.out.println("Exception Occured while creating restTemplate "+exception);exception.printStackTrace();}return restTemplate;}public static void main(String[] args) {SpringApplication.run(ClientMain.class, args);}@Overridepublic void run(String... args) throws Exception {String forObject = restTemplate.getForObject(new URI(msEndpoint), String.class);System.out.println(forObject);} }

源碼打包下載地址：

https://github.com/fengfanchen/Java/tree/master/SpringBoot-two-way-ssl

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