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import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
public class MainClass {
public static void main(String[] args) {
if (args.length != 2) {
String err = "Usage: KeyGeneratorApp algorithmName keySize";
System.out.println(err);
System.exit(0);
}
int keySize = (new Integer(args[1])).intValue();
SecretKey skey = null;
KeyPair keys = null;
String algorithm = args[0];
try {
KeyPairGenerator kpg = KeyPairGenerator.getInstance(algorithm);
kpg.initialize(keySize);
keys = kpg.genKeyPair();
} catch (NoSuchAlgorithmException ex1) {
try {
KeyGenerator kg = KeyGenerator.getInstance(algorithm);
kg.init(keySize);
skey = kg.generateKey();
} catch (NoSuchAlgorithmException ex2) {
System.out.println("Algorithm not supported: " + algorithm);
System.exit(0);
}
}
}
}
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