org.jgroups.demos.KeyStoreGenerator Maven / Gradle / Ivy
package org.jgroups.demos;
import org.jgroups.util.Util;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.security.KeyStore;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
/**
* Generates a keystore file that has a SecretKey in it. It is not possible to
* use the keytool JDk tool to achieve this. This is a simple way to generate a
* JCEKS format keystore and SecretKey.
*
* Usage is --alg ALGNAME --size ALGSIZE --storeName FILENAME --storePass
* PASSWORD --alias KEYALIAS
*
* Any of args are optional and will default to
*
* - ALGNAME = Blowfish
*
- ALGSIZE = 56
*
- FILENAME = defaultStore.keystore
*
- PASSWORD = changeit
*
- ALIAS = mykey
*
*
* @author S Woodcock
*
*/
public class KeyStoreGenerator {
static String symAlg="AES";
static int keySize=128;
static String keyStoreName="defaultStore.keystore";
static String storePass="changeit";
static String alias="myKey";
public static void main(String[] args) {
int i=0;
String arg=null;
while(i < args.length && args[i].startsWith("-")) {
arg=args[i++];
System.out.println("Found arg of " + arg);
if(arg.equalsIgnoreCase("--alg")) {
if(i < args.length) {
symAlg=args[i++];
}
else {
System.out.println("No Algorithm supplied using default of " + symAlg);
}
}
else if(arg.equalsIgnoreCase("--size")) {
if(i < args.length) {
keySize=Integer.parseInt(args[i++]);
}
else {
System.out.println("No Size supplied using default of " + keySize);
}
}
else if(arg.equalsIgnoreCase("--storeName")) {
if(i < args.length) {
keyStoreName=args[i++];
}
else {
System.out.println("No keystore supplied using default of " + keyStoreName);
}
}
else if(arg.equalsIgnoreCase("--storePass")) {
if(i < args.length) {
storePass=args[i++];
}
else {
System.out.println("No password supplied using default of " + storePass);
}
}
else if(arg.equalsIgnoreCase("--alias")) {
if(i < args.length) {
alias=args[i++];
}
else {
System.out.println("No alias supplied using default of " + alias);
}
}
}
System.out.println("Creating file '" + keyStoreName
+ "' using Algorithm '"
+ symAlg
+ "' size '"
+ keySize
+ "'");
OutputStream stream=null;
try {
stream=new FileOutputStream(keyStoreName);
SecretKey key=initSymKey();
KeyStore store=KeyStore.getInstance("JCEKS");
store.load(null, null);
store.setKeyEntry(alias, key, storePass.toCharArray(), null);
store.store(stream, storePass.toCharArray());
}
catch(Exception e) {
e.printStackTrace();
}
finally {
try {
Util.close(stream);
}
catch(Exception e) {
}
}
System.out.println("Finished keystore creation");
}
public static SecretKey initSymKey() throws Exception {
KeyGenerator keyGen=KeyGenerator.getInstance(getAlgorithm(symAlg));
keyGen.init(keySize);
return keyGen.generateKey();
}
private static String getAlgorithm(String s) {
int index=s.indexOf("/");
if(index == -1)
return s;
return s.substring(0, index);
}
}