Java如何基于command调用openssl生成私钥证书_Java教程

Java如何基于command调用openssl生成私钥证书

2020-08-05 12:20护花使者 Java教程

这篇文章主要介绍了Java如何基于command调用openssl生成私钥证书,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

在windows环境下进行的测试，前提条件，windows上需要先安装openssl。

配置环境变量，查看版本：

Java如何基于command调用openssl生成私钥证书

									import java.io.*;

									import java.util.Properties;

									public class OpensslCommand {

									  private static void runCMD(String[] CMD) {

									    java.lang.Process process = null;

									    try {

									      process = Runtime.getRuntime().exec(CMD);

									      ByteArrayOutputStream resultOutStream = new ByteArrayOutputStream();

									      InputStream errorInStream = new BufferedInputStream(process.getErrorStream());

									      InputStream processInStream = new BufferedInputStream(process.getInputStream());

									      int num = 0;

									      byte[] bs = new byte[1024];

									      while ((num = errorInStream.read(bs)) != -1) {

									        resultOutStream.write(bs, 0, num);

									      }

									      while ((num = processInStream.read(bs)) != -1) {

									        resultOutStream.write(bs, 0, num);

									      }

									      String result = new String(resultOutStream.toByteArray(), "gbk");

									      System.out.println(result);

									      errorInStream.close();

									      processInStream.close();

									      resultOutStream.close();

									    } catch (IOException e) {

									      e.printStackTrace();

									    } finally {

									      if (process != null) process.destroy();

									    }

									  }

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

									    //需要指定openssl.exe路径

									    //java生成私钥

									    String[] cmdPrivateKey = {"cmd", "/C", "C:\\soft\\OpenSSL-Win64\\bin\\openssl.exe genrsa -out ca.key 2048"};

									    //java生成证书请求

									    String[] cmdCertificationReq = {"cmd", "/C", "C:\\soft\\OpenSSL-Win64\\bin\\openssl.exe req -new -key ca.key -out ca.csr -subj /C=CN"};

									    //java生成证书

									    String[] cmdCertification = {"cmd", "/C", "C:\\soft\\OpenSSL-Win64\\bin\\openssl.exe x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt"};

									    runCMD(cmdPrivateKey);

									    runCMD(cmdCertificationReq);

									    runCMD(cmdCertification);

									    Properties props=System.getProperties(); //系统属性

									    System.out.println("用户的当前工作目录："+props.getProperty("user.dir"));

									  }

									}