如何使用JSch库在ec2连接中将.pem文件内容用作字符串

问题描述

这是使用.pem文件连接到亚马逊实例的代码.

Here is the code to get the connection to amazon instance using .pem file.

import com.jcraft.jsch.*;

public class JConnectEC2shell{
  public static void main(String[] arg){

    try{
      JSch jsch=new JSch();

      String user = "ec2-user";
      String host = "Enter Ip address of your instance";
      int port = 22;
      String privateKey = "D:\\privateKeyFile.pem";

      jsch.addIdentity(privateKey);
      System.out.println("identity added ");

      Session session = jsch.getSession(user, host, port);
      System.out.println("session created.");

      // disabling StrictHostKeyChecking may help to make connection but makes it insecure
      // see http://stackoverflow.com/questions/30178936/jsch-sftp-security-with-session-setconfigstricthostkeychecking-no
      // 
         java.util.Properties config = new java.util.Properties();
         config.put("StrictHostKeyChecking", "no");
         session.setConfig(config);

      session.connect();

      Channel channel=session.openChannel("shell");

      // Enable agent-forwarding.
      //((ChannelShell)channel).setAgentForwarding(true);

      channel.setInputStream(System.in);
      /*
      // a hack for MS-DOS prompt on Windows.
      channel.setInputStream(new FilterInputStream(System.in){
          public int read(byte[] b, int off, int len)throws IOException{
            return in.read(b, off, (len>1024?1024:len));
          }
        });
       */

      channel.setOutputStream(System.out);

      /*
      // Choose the pty-type "vt102".
      ((ChannelShell)channel).setPtyType("vt102");
      */

      /*
      // Set environment variable "LANG" as "ja_JP.eucJP".
      ((ChannelShell)channel).setEnv("LANG", "ja_JP.eucJP");
      */

      //channel.connect();
      channel.connect(3*1000);
    }
    catch(Exception e){
      System.out.println(e);
    }
  }
}

我想将.pem文件(jsch.addIdentity(privateKey);)中的私钥设置为来自数据库的字符串.现在它是一个文件名.这是否可能，任何帮助都将是可贵的.我已经从链接点击此处

I want to set the private key in .pem file (jsch.addIdentity(privateKey);) as a string coming from the data base. Now it is a file name. Is this possible, any help would be appreciable. I have got this code from the link click here

推荐答案

调用JSCH

String pemFormat = addMarkers(connectionParams.getIdentity());
jsch.addIdentity("TunnelPrivateKey.pem", pemFormat.getBytes(), null, null);

删除空间并添加标记

private static String addMarkers(String identity) {
        identity = identity.replaceAll("\\s+", "");
        String lineBreak = "\r\n";
        StringBuilder key = new StringBuilder();
        key.append("-----BEGIN RSA PRIVATE KEY-----");
        key.append(lineBreak);
        for (int i = 0; i< identity.length(); i+=76) {
            int len = Math.min(i+76 , identity.length());
            key.append(identity.substring(i, len));
            key.append(lineBreak);
        }
        key.append("-----END RSA PRIVATE KEY-----");
        return key.toString();
}

这篇关于如何使用JSch库在ec2连接中将.pem文件内容用作字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！