Java:InvalidAlgorithmParameterException Prime 大小必须是 64 的倍数 [英] Java: InvalidAlgorithmParameterException Prime size must be multiple of 64
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问题描述
我实现了一个 Java 程序，该程序将使用 JSCH 在远程服务器中连接并执行命令.问题是，每当我尝试连接到服务器时，都会出现以下异常:
I implemented a Java program that will connect and execute a command in a remote server using JSCH. The problem is that whenever I tried to connect to the server, I got the following exception:
com.jcraft.jsch.JSchException: Session.connect: java.security.InvalidAlgorithmParameterException: Prime size must be multiple of 64, and can only range from 256 to 2048 (inclusive)
我尝试了在 jre/lib 和 security.provider 中添加 Bouncy Castle 提供程序的解决方案，并且它有效.但是我需要让它依赖于项目，所以我尝试在我的构建路径中添加 Bouncy Castle，并在我的程序中手动添加 Bouncy Castle 提供程序.但是导出到jar后，还是收到异常.
I tried the solution of adding the Bouncy Castle provider in jre/lib and security.provider and it works. But I need to make it project dependent, so I tried to add Bouncy Castle in my build path and add manually the Bouncy Castle provider in my program. But after exporting it to jar, I am still receiving the exception.
package services;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.Security;
import java.util.Iterator;
import java.util.Properties;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
public class MainService {
public MainService() {
Security.addProvider(new BouncyCastleProvider()); //Adding BouncyCastlePRovider in security
// TODO Auto-generated constructor stub
String report = "";
StringBuilder sb = new StringBuilder();
System.out.println("Running the monitoring...");
System.out.println("Starting printer monitoring...");
PrinterService ps = new PrinterService(); //A service that connects to the server and executes the commands
System.out.println("Building report for printer");
sb.append(ps.buildReport());
System.out.println("Done building report for printer");
System.out.println("Finish printer Monitoring...");
report = sb.toString();
writeToFile(report,"fai");
}
public static void main(String[] args) {
// TODO Auto-generated method stub
MainService msrv = new MainService();
}
public void writeToFile(String contents,String report_name){
try {
System.out.println("Writing to file...");
PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(report_name+".html",false)));
pw.println(contents);
pw.close();
System.out.println("Done writing...");
} catch (IOException e) {
e.printStackTrace();
}
}
}
这是我处理服务器连接的服务器实用程序:
Here is my Server utilities that handles server connection:
package utilities;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Properties;
import javax.swing.JOptionPane;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import entity.Server;
public class ServerUtil {
public ServerUtil() {
// TODO Auto-generated constructor stub
}
public static Session createSession(Server srv){
JSch js = new JSch();
try {
Session s = js.getSession(srv.getUser().getUsername(), srv.getAddress(), 22);
s.setPassword(srv.getUser().getPassword());
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
config.put("PreferredAuthentications", "password");
s.setConfig(config);
s.connect();
return s;
} catch (JSchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
public static ArrayList<String> executeCommands(Session s, String commands){
ArrayList<String> result = new ArrayList<String>();
try {
System.out.println("Creating channel...");
ChannelExec channel = (ChannelExec) s.openChannel("exec");
System.out.println("Channel created.");
System.out.println("Setting commands...");
channel.setCommand(commands);
System.out.println("Commands set.");
System.out.println("Connecting to channel...");
channel.connect();
System.out.println("Channel connected.");
System.out.println("Retrieving output...");
BufferedReader reader = new BufferedReader(new InputStreamReader(channel.getInputStream()));
String line;
while((line = reader.readLine()) != null){
result.add(line);
}
System.out.println("Output retrieved.");
channel.disconnect();
System.out.println("Returning result...");
return result;
} catch (JSchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return result;
}catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return result;
}
}
}
调试时发现是打印机服务尝试连接服务器时出错.
While debugging, I find out that the error occurs when the printer service tries to connect to the server.
package services;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.StringTokenizer;
import com.jcraft.jsch.Session;
import entity.Server;
import utilities.DatabaseUtil;
import utilities.ServerUtil;
public class PrinterService {
private ArrayList<String> server_names;
private ArrayList<ArrayList<String>> result_server;
public PrinterService() {
// TODO Auto-generated constructor stub
executePrinterMonitoring();
}
//Connect to the printer server and process printer monitoring
public void executePrinterMonitoring(){
Iterator<Server> it_s = DatabaseUtil.getServers("PRINTER").iterator();
server_names = new ArrayList<String>();
result_server = new ArrayList<ArrayList<String>>();
while(it_s.hasNext()){
Server svr = it_s.next();
System.out.println("***********START PRINTER SERVER***********");
String commands = "lpstat -t | sed '/READY/d'; lpstat -W | sed '/READY/d'";
Session connect = ServerUtil.createSession(svr);
StringTokenizer tokenize = new StringTokenizer(commands, ";");
ArrayList<String> res;
ArrayList<ArrayList<String>> res2 = new ArrayList<ArrayList<String>>();
System.out.println("Executing commands...");
while(tokenize.hasMoreTokens()){
String comm = tokenize.nextToken().trim();
res = ServerUtil.executeCommands(connect, comm);
res2.add(res);
}
System.out.println("Done executing commands...");
System.out.println("Processing results...");
processPMonitoring(res2,svr.getName());
connect.disconnect();
System.out.println("***********END PRINTER SERVER***********");
}
}
//Get the current date, date - 1, and date - 2
public String getDate(Calendar cal){
String mon;
String dy;
String dy2;
String dy3;
String yr;
int month = cal.get(Calendar.MONTH)+1;
int day = cal.get(Calendar.DATE);
int year = cal.get(Calendar.YEAR);
if(month < 10)
mon = "0"+month;
else
mon = ""+month;
if(day < 10){
dy = "0"+day;
}
else{
dy = ""+day;
}
yr = (year+"").substring(2, 4);
String date = mon+ "/"+dy+"/"+yr;
return date;
}
//Split and process the result from the server.
public void processPMonitoring(ArrayList<ArrayList<String>> s,String servername){
Iterator<String> res1 = s.get(0).iterator();
Iterator<String> res2 = s.get(1).iterator();
ArrayList<String> as = new ArrayList<String>();
ArrayList<String> fres = new ArrayList<String>();
Calendar cal = Calendar.getInstance();
String date1 = getDate(cal);
cal.add(Calendar.DATE, -1);
String date2 = getDate(cal);
cal.add(Calendar.DATE, -1);
String date3 = getDate(cal);
int header = 1;
System.out.println("Checking server:"+servername);
System.out.println("Getting queued results...");
while(res1.hasNext()){
if(header <= 3){
//as.add(res1.next());
header++;
}
else{
String curr = res1.next();
if(curr.contains("@")){
if(curr.contains("STDIN")){
String f4 = "";
String f5 = "";
if(res1.hasNext())
f4 = res1.next();
if(res1.hasNext())
f5 = res1.next();
if(f4.contains(date1)){
as.add(curr);
}
else if(f4.contains(date2)){
as.add(curr);
}
else if(f4.contains(date3)){
as.add(curr);
}
}
}
else{
String f1 = curr;
String f2 = "";
String f3 = "";
if(res1.hasNext())
f2 = res1.next();
if(res1.hasNext())
f3 = res1.next();
if(f2.contains(date1)){
as.add(f1);
}
else if(f2.contains(date2)){
as.add(f1);
}
else if(f2.contains(date3)){
as.add(f1 + " - 3 DAYS OLD!");
}
}
}
}
System.out.println("Done queued results...");
Iterator<String> g = as.iterator();
boolean flag = true;
String cl = "";
String std = "";
header = 1;
System.out.println("Processing queued results...");
while(res2.hasNext() && g.hasNext()){
if(header <=2){
fres.add(res2.next());
header++;
}
else{
String curr = res2.next();
if(curr.contains("@")){
fres.add(curr);
continue;
}
if(flag){
cl = g.next();
if(cl.contains("@") && cl.contains("STDIN")){
continue;
}
int first_st = cl.indexOf("STDIN");
int last_ind = 0;
for(last_ind = first_st+1;;last_ind++){
//System.out.println("Value of CL:"+cl);
//System.out.println("Checking for spaces");
//System.out.println("STD CURRENT CHAR:"+cl.charAt(last_ind));
if(cl.charAt(last_ind) == ' '){
break;
}
}
std = cl.substring(first_st, last_ind);
flag = false;
if(fres.get(fres.size()-1).contains(std)){
flag = true;
continue;
}
}
if(curr.contains(std)){
fres.add(curr);
flag = true;
}
}
}
System.out.println("Done processing queued results...");
System.out.println("Post-process queued results...");
int size = fres.size();
boolean down = false;
for(int i=0;i<size;i++){
if(fres.get(i).contains("@") && fres.get(i).contains("DOWN")){
down = true;
fres.remove(i);
i--;
size--;
continue;
}
if(down){
if(fres.get(i).contains("@") && !fres.get(i).contains("DOWN")){
down = false;
continue;
}
fres.remove(i);
i--;
size--;
}
}
System.out.println("Done post-processing queued results...");
//Post-process
server_names.add(servername);
result_server.add(fres);
//fres.add(0,servername);
//writeToFile(fres,3);
}
public String buildReport(){
String report = "";
StringBuilder sb = new StringBuilder();
Timestamp ts = new Timestamp(new Date().getTime());
sb.append("<table style="border:1px solid black; text-align:center;" rules="all">");
sb.append("<h1 style="margin:0px 0px 0px 50px">Printer Monitoring as of "+ts.toString()+"</h1>");
sb.append("<tr style="background-color: seagreen">"
+ "<th style="padding: 6px">SERVER</th>"
+ "<th style="padding: 6px">QUEUE</th>"
+ "<th style="padding: 6px">DEV</th>"
+ "<th style="padding: 6px">STATUS</th>"
+ "<th style="padding: 6px">JOB FILES</th>"
+ "<th style="padding: 6px">USER</th>"
+ "<th style="padding: 6px">PP</th>"
+ "<th style="padding: 6px">%</th>"
+ "<th style="padding: 6px">BLKS</th>"
+ "<th style="padding: 6px">CP</th>"
+ "<th style="padding: 6px">RNK</th>"
+ "</tr>");
int counter = 0;
Iterator<String> it_s = server_names.iterator();
while(it_s.hasNext()){
sb.append("<tr style="background-color: green"><td style="padding: 6px"><b>"+it_s.next().toUpperCase()+"</b></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>");
Iterator<String> it_res = result_server.get(counter).iterator();
if(result_server.get(counter).isEmpty()){
sb.append("<tr><td></td><td style="padding: 6px"><h5>CLEAN</h5></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>");
}
else if(result_server.get(counter).size() == 2){
sb.append("<tr><td></td><td style="padding: 6px"><h5>CLEAN</h5></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>");
}
else{
while(it_res.hasNext()){
String res = it_res.next();
if(!res.contains("Dev") && !res.contains("----")){
StringTokenizer tok = new StringTokenizer(res," ");
sb.append("<tr>");
if(tok.countTokens() == 11){
sb.append("<td style="padding: 6px"></td>");
for(int x=0;x<10;x++){
if(x == 3){
sb.append("<td style="padding: 6px">"+tok.nextToken()+" "+tok.nextToken()+"</td>");
}
else{
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
}
}
}
else{
sb.append("<td style="padding: 6px"></td>");
sb.append("<td style="padding: 6px"></td>");
sb.append("<td style="padding: 6px"></td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+" "+tok.nextToken()+"</td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
sb.append("<td style="padding: 6px"></td>");
sb.append("<td style="padding: 6px"></td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
sb.append("<td style="padding: 6px">"+tok.nextToken()+"</td>");
}
sb.append("</tr>");
}
}
}
counter++;
}
sb.append("</table>");
sb.append("</br></br>");
report = sb.toString();
return report;
}
}
我还想知道是否有办法让 Bouncy Castle 变轻，因为我需要我的罐子
2MB，因为我需要将其传输到服务器，而且我没有传输大于 2MB 的文件的权限.
I would also like to know if there is a way to make Bouncy Castle a light weight, since I need my jar to be < 2MB since I need to transfer it to a server, and I don't have a permission to transfer a file > 2MB.
谢谢你的帮助.这是我在 stackoverflow 上的第一篇文章，我真的很喜欢这个社区.谢谢.
Thank you for the help. This is my first post in stackoverflow, and I really love this community. Thanks.
推荐答案
我尝试使用在服务器中生成的 2048 位密钥，但仍然收到这些错误.我找到的解决方案是使用不同的 SSH 库，而有效的是 Ganymed SSH-2，而不是 JSch.谢谢大家的建议和意见.
I tried using a 2048 bit key that I generate in a server, still I am receiving those error. The solution that I found is to use a different SSH library and the one that works is Ganymed SSH-2, instead of JSch. Thank you for all the suggestions and comments.
此外，这个库也是轻量级的~1MB.
Edited: In addition, this library is also light weight ~1MB.
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