From 1073af21305360bd33903c533cdac57e9f936294 Mon Sep 17 00:00:00 2001
From: Yuuta Liang <yuutaw@student.cs.ubc.ca>
Date: Tue, 28 Nov 2023 18:19:39 -0800
Subject: Move TUI and GUI into separate packages

Signed-off-by: Yuuta Liang <yuutaw@student.cs.ubc.ca>
---
 src/main/ui/tui/MgmtScreen.java | 153 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 src/main/ui/tui/MgmtScreen.java

(limited to 'src/main/ui/tui/MgmtScreen.java')

diff --git a/src/main/ui/tui/MgmtScreen.java b/src/main/ui/tui/MgmtScreen.java
new file mode 100644
index 0000000..007bd0e
--- /dev/null
+++ b/src/main/ui/tui/MgmtScreen.java
@@ -0,0 +1,153 @@
+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/ #";
+    }
+}
\ No newline at end of file
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