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package ui.tui;
import model.asn1.exceptions.InvalidCAException;
import model.asn1.exceptions.ParseException;
import model.asn1.parsing.BytesReader;
import model.csr.CertificationRequest;
import model.pki.cert.Certificate;
import model.pki.cert.TbsCertificate;
import ui.Utils;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
/**
* Manage the private key and CA certificate. It can print the public key, generate CSR, and install CA cert.
*/
public class MgmtScreen implements UIHandler {
private final JCA session;
/**
* EFFECTS: Init with the parent session.
*/
public MgmtScreen(JCA session) {
this.session = session;
}
/**
* EFFECTS: Print help
*/
@Override
public void help() {
System.out.print("show\tView the public key and CA certificate\n"
+ "genkey\tGenerate a RSA private key\n"
+ "csr\tGenerate a CSR for a upper-level CA to sign\n"
+ "install\tInstall a CA certificate\n"
+ "exit\tGo to main menu\n"
+ "help\tPrint this message\n");
}
/**
* EFFECTS: Format the public key and CA
*/
@Override
public void show() {
if (session.getCa().getPublicKey() == null) {
System.out.println("No private key installed");
} else {
System.out.println("Public Key (RSA2048):");
System.out.printf("\tModules:\t\t%s\n", session.getCa().getPublicKey().getModulus().toString(10));
System.out.printf("\tPublic Exponent:\t%s\n",
session.getCa().getPublicKey().getPublicExponent().toString(16));
}
if (!session.checkCA(true)) {
return;
}
final TbsCertificate info = session.getCa().getCertificate().getCertificate();
System.out.printf("Subject:\t%s\n", info.getSubject().toString());
System.out.printf("Issuer:\t%s\n", info.getIssuer().toString());
System.out.printf("Not Before:\t%s\n", info.getValidity().getNotBefore().getTimestamp());
System.out.printf("Not After:\t%s\n", info.getValidity().getNotAfter().getTimestamp());
System.out.printf("Signature:\t%s\n",
Base64.getEncoder().encodeToString(Utils.byteToByte(info.getSubjectPublicKeyInfo()
.getSubjectPublicKey().getConvertedVal())));
}
/**
* EFFECT: Generate a CSR
* MODIFIES: session
*/
private void handleCSR() {
if (!session.checkCA(false)) {
return;
}
try {
CertificationRequest req = session.getCa().signCSR();
System.out.println(Utils.toPEM(req.encodeDER(), "CERTIFICATE REQUEST"));
session.setUnsaved(true);
} catch (Throwable e) {
System.out.println(e.getMessage());
}
}
/**
* EFFECTS: Handle the 'install' command. Read incoming certificate and validate it.
* MODIFIES: session
*/
private void handleInstall() {
if (!session.checkCA(false)) {
return;
}
try {
final Byte[] in = session.handleInputPEM("CERTIFICATE");
final Certificate cert = new Certificate(new BytesReader(in), false);
session.getCa().installCertificate(cert);
session.setUnsaved(true);
} catch (InvalidCAException | ParseException e) {
System.out.println(e.getMessage());
}
}
/**
* EFFECTS: Handle the 'genkey' command. Generate a RSA2048 private key.
* MODIFIES: session
*/
private void handleGenKey() {
if (session.getCa().getPublicKey() != null) {
System.out.println("A private key is already installed.");
}
try {
session.getCa().generateKey();
session.setUnsaved(true);
} catch (NoSuchAlgorithmException e) {
System.out.println(e.getMessage());
}
}
/**
* EFFECTS: Handle commands.
*/
@Override
public void command(String... args) {
switch (args[0]) {
case "genkey":
handleGenKey();
break;
case "csr":
handleCSR();
break;
case "install":
handleInstall();
break;
default:
help();
break;
}
}
/**
* EFFECTS: Go to main menu
*/
@Override
public Screen exit() {
return Screen.MAIN;
}
/**
* EFFECTS: return "/ca/ #"
*/
@Override
public String getPS1() {
return "/ca/ #";
}
}
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