我正在运行JDK 1.7＆amp; Windows 7使用netbeans 7.2 我已经生成了一个SSH私有＆amp;使用putty-keygen的公钥对（SSH2-2048位）。私钥没有任何密码。 我现在正尝试使用SFTP连接到其中一台主机。但是当我传递私钥（ppk）来设置Identity时，代码返回无效的私钥错误。我在WinSCP中使用相同的私钥连接到同一主机＆amp;它工作正常。请帮我解决错误。 这是我的代码：
JSch jsch = new JSch();
Session session = null;
try {
jsch.addIdentity("D:\\TEMP\\key.ppk");
session = jsch.getSession("tiabscp", "ssiw.support.qvalent.com", 22);
session.setConfig("StrictHostKeyChecking", "no");
//session.setPassword("");
session.connect();
Channel channel = session.openChannel("sftp");
System.out.println("Getting connected");
channel.connect();
System.out.println("connected successfully");
ChannelSftp sftpChannel = (ChannelSftp) channel;
sftpChannel.get("remotefile.txt", "localfile.txt");
sftpChannel.exit();
session.disconnect();
}catch (JSchException e) {
e.printStackTrace();
}catch (SftpException e) {
e.printStackTrace();
}
答案 0 :(得分：30)
我猜你的密钥不是OpenSSH密钥文件格式。 JSch期望私钥是OpenSSH格式。
您可以按照here所述的步骤使用PuTTYgen转换您的私钥以使用OpenSSH：
答案 1 :(得分：4)
也许不是你的解决方案，但是当我搜索我的问题时，我发现了这个问题。
当JSCH期望私钥文件时，我不小心给出了公钥文件的路径。
答案 2 :(得分：2)
以下示例代码可以为您提供帮助。
package ssh.control;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import android.util.Log;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
public class SSHConnections {
static String user="";
static String pass="";
static String ip="";
static Session session;
public static ChannelExec getChannelExec() throws Exception{
//System.out.println("connected");
//This class serves as a central configuration point, and as a factory for Session objects configured with these settings.
JSch jsch = new JSch();
//A Session represents a connection to a SSH server.
session = jsch.getSession(user, ip, 22);
//getSession() :- the session to which this channel belongs.
session.setPassword(pass);
// Avoid asking for key confirmation
//http://docs.oracle.com/javase/1.4.2/docs/api/java/util/Properties.html
Properties prop = new Properties();
prop.put("StrictHostKeyChecking", "no");
//Sets multiple default configuration options at once.
session.setConfig(prop);
session.connect();
if(session.isConnected()) {
System.out.println("connected");
}
// SSH Channel
//Opens a new channel of some type over this connection.
ChannelExec channelssh = (ChannelExec) session.openChannel("exec");
return channelssh;
}
public static String[] executeRemoteCommand(String command) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ChannelExec channelssh = SSHConnections.getChannelExec();
channelssh.setOutputStream(baos);
// Execute command
channelssh.setCommand(command);//gedit tt
InputStreamReader isr = new InputStreamReader(channelssh.getInputStream());
BufferedReader bufred = new BufferedReader(isr);
channelssh.connect();
String s = bufred.readLine();
List<String> lines = new ArrayList<String>();
int count = 0;
while( s!=null ) {
//System.out.println(s);
lines.add(count,s);
// filesandfolders[count]=s;
// System.out.println(filesandfolders[count]);
s = bufred.readLine();
count++;
}
String filesandfolders[] = new String[count];
for(int i = 0; i<count;i++) {
filesandfolders[i] = lines.get(i);
Log.d("filesandfolders[i]", filesandfolders[i]);
}
//for(int j=0;j<filesandfolders.length;j++) {
//System.out.println(filesandfolders[j]);
//}
//System.out.println("lines is "+lines.get(0));
//int a;
//while((a = isr.read()) != -1)
//System.out.print((char)a);
//channelssh.disconnect();
//return baos.toString();
return filesandfolders;
}
public static List<String> executeRemoteCommand1(String command) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ChannelExec channelssh=SSHConnections.getChannelExec();
channelssh.setOutputStream(baos);
// Execute command
channelssh.setCommand(command);//gedit tt
InputStreamReader isr = new InputStreamReader(channelssh.getInputStream());
BufferedReader bufred = new BufferedReader(isr);
channelssh.connect();
String s = bufred.readLine();
List<String> lines = new ArrayList<String>();
int count=0;
while(s != null) {
//System.out.println(s);
lines.add(count, s);
// filesandfolders[count] = s;
// System.out.println(filesandfolders[count]);
s = bufred.readLine();
count++;
}
String filesandfolders[] = new String[count];
for(int i=0; i<count;i++) {
filesandfolders[i]=lines.get(i);
}
//for(int j=0;j<filesandfolders.length;j++) {
//System.out.println(filesandfolders[j]);
//}
//System.out.println("lines is "+lines.get(0));
//int a;
//while((a = isr.read()) != -1)
//System.out.print((char)a);
//channelssh.disconnect();
//return baos.toString();
return lines;
}
}
制作目录：
SSHConnections.user = "username";
SSHConnections.ip = "192.168.1.102";
SSHConnections.pass = "mypassword";
ChannelExec channelssh = SSHConnections.getChannelExec();
String dirname = "sampledirectory";
try {
String[] str = SSHConnections.executeRemoteCommand("mkdir "+dirname);
} catch (Exception e) {
e.printStackTrace();
}
答案 3 :(得分：0)
您可以使用PEMWriter将您的私钥转换为JSch将接受的PEM格式
以下示例转换从Java KeyStore（JKS）返回的密钥
Key privateKey = KeyStore.getKey(privateKeyAlias, keyStorePassword);//get key from JKS
StringWriter stringWriter = new StringWriter();
PEMWriter pemWriter = new PEMWriter(stringWriter);
pemWriter.writeObject(privateKey);
pemWriter.close();
byte[] privateKeyPEM = stringWriter.toString().getBytes();
答案 4 :(得分：0)
在使用JSch使用ppk进行ssh时遇到了同样的问题。这可能对某人有用。
使用来自Putty的ppk文件时，它可以正常工作。但是，与JSch一起使用时，它曾经引发此异常。
我尝试了几种解决方案。最后，我只是将ppk文件加载到PuTTYgen并保存了Private Key，这在文本编辑器中生成了外观类似的文件，但是它起作用了。