package gr.cript;

import java.applet.Applet;
import gr.cript.jni.*;
import gr.cript.jdirect.*;
import netscape.javascript.*;

public class JCript implements JCriptHighLevelInterface {
	public static final int IEXPLORER = 24;
	public static final int STANDARD = 34;
	public static final int NETSCAPE = 98;
	private JCriptLowLevelInterface cr;
public JCript() {
	cr = new JniCriptStandard();
}
public JCript(Applet ap) {
	switch (getBrowserCode(ap)) {
		case IEXPLORER: { 
			cr = new JDirectCript();
			return;
		}
		case STANDARD: {
			cr = new JniCriptStandard();
			return; 
		}
		case NETSCAPE: {
			cr = new JniCriptNetscape(); 
			return;
		}
		default: {
			cr = new JniCriptStandard();
			return;
		}
	}
}
public void changePassword(String oldPwd, String newPwd) throws CriptException {
	int res=cr.changePassword(oldPwd,newPwd);
	if (res!=0)
		throw new CriptException(CriptException.solve(res));
}
public DecryptResult decrypt(String pwd, JBuffer in) throws CriptException {
	DecryptResult ds = new DecryptResult();
	int res = cr.decrypt(pwd,in,ds);
	if (res!=0) {
		throw new CriptException(CriptException.solve(res));
	}
	return ds;
}
public JBuffer encrypt(Algorithm alg, JDn dn, JBuffer inBuf) throws CriptException {
	JBuffer outBuf=new JBuffer();
	int res = cr.encrypt(alg.intValue(),dn,inBuf,outBuf);
	if (res!=0) {
		throw new CriptException(CriptException.solve(res));
	}
	return outBuf;
}
private static int getBrowserCode(Applet param) {
	try {
		JSObject w=(JSObject)JSObject.getWindow(param);
		JSObject nav=(JSObject)w.getMember("navigator");
		String appName=(String)nav.getMember("appName");
		if (appName.equals("Netscape")) return JCript.NETSCAPE;
		if (appName.equals("Microsoft Internet Explorer")) return JCript.IEXPLORER;
		return JCript.STANDARD;
	} catch (Throwable js) {
		js.printStackTrace();
		return JCript.STANDARD;
	}
}
public JDn login(String pwd) throws CriptException {
	JDn dn=new JDn();
	int res=cr.login(pwd,dn);
	if (res!=0) {
		throw new CriptException(CriptException.solve(res));
	}
	return dn;
	
}
public JBuffer sign(Algorithm alg, String pwd, JBuffer inBuf) throws CriptException {
	JBuffer outBuf=new JBuffer();
	int res = cr.sign(alg.intValue(),pwd,inBuf,outBuf);
	if (res!=0) {
		throw new CriptException(CriptException.solve(res));
	}
	return outBuf;
}
public VerifyResult verify(JBuffer inBuf) throws CriptException {
	VerifyResult vs = new VerifyResult();
	int res = cr.verify(inBuf,vs);
	if (res!=0) {
		throw new CriptException(CriptException.solve(res));
	}
	return vs;
}
}