java - Can not get key from KeyStore

Question

I try to get Key from KeyStore. I created a keystore by Keytool:

keytool -genkeypair -dname "cn=Mark Jones, ou=JavaSoft, o=Sun, c=US" -alias business2 -keypass abcdtest -keystore C:workspaceXMLSamplekeystoremykeystore.jks -storepass 123456

And the following is GenerateXML.java

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.cert.X509Certificate;
import javax.xml.crypto.dsig.XMLSignContext;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;

public class GenerateXML {

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

        try {
            char[] passwd = "123456".toCharArray();

            //Load the KeyStore and get the signing key and certificate
            KeyStore ks = KeyStore.getInstance("JKS");
            ks.load(new FileInputStream("C:\workspace\XMLSample\keystore\mykeystore.jks"), passwd);
            KeyStore.PrivateKeyEntry keyEnt = (KeyStore.PrivateKeyEntry)ks.getEntry("business2", new KeyStore.PasswordProtection(passwd));   // -> ERROR IN THIS ROW

            X509Certificate cert = (X509Certificate)keyEnt.getCertificate();

            //Create a DOMSignContext
            XMLSignContext context = new DOMSignContext(keyEnt.getPrivateKey(), doc.getDocumentElement()) ;

            //Create a DOM XMLSignatureFactory
            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");

        } catch(Exception e) {
            e.printStackTrace();
            throw new Exception(e.toString());
        }
    }
}

I run on Java 1.6

But have error:

java.security.UnrecoverableKeyException: Cannot recover key
at sun.security.provider.KeyProtector.recover(KeyProtector.java:311)
at sun.security.provider.JavaKeyStore.engineGetKey(JavaKeyStore.java:121)
at sun.security.provider.JavaKeyStore$JKS.engineGetKey(JavaKeyStore.java:38)
at java.security.KeyStoreSpi.engineGetEntry(KeyStoreSpi.java:456)
at java.security.KeyStore.getEntry(KeyStore.java:1261)
at xml.generate.GenerateXML.main(GenerateXML.java:31)

Answer 1

I've run accross the similar issue. The root of the problem was that I used a different password for the key than for the whole keystore. The code is similar to the one in the JSSE article. It looks like this:

serverKeyStore.load(new FileInputStream("resource/server.jks"), passphrase.toCharArray());
TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
tmf.init(serverKeyStore);
KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
kmf.init(serverKeyStore, keyphrase.toCharArray());

I use the keystore pass in the first line and the key pass in the last.