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/IssueScreen.java | 168 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 src/main/ui/tui/IssueScreen.java

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

diff --git a/src/main/ui/tui/IssueScreen.java b/src/main/ui/tui/IssueScreen.java
new file mode 100644
index 0000000..26ceb02
--- /dev/null
+++ b/src/main/ui/tui/IssueScreen.java
@@ -0,0 +1,168 @@
+package ui.tui;
+
+import model.asn1.exceptions.ParseException;
+import model.ca.Template;
+import model.csr.CertificationRequest;
+import model.pki.cert.Certificate;
+import model.x501.Name;
+import ui.Utils;
+
+/**
+ * The screen that accepts a CSR and template and allows user to change its properties and issue.
+ */
+public class IssueScreen implements UIHandler {
+    private final JCA session;
+
+    private Template template;
+    private CertificationRequest incomingCSR;
+
+    /**
+     * EFFECTS: Init with the session.
+     */
+    public IssueScreen(JCA session) {
+        this.session = session;
+    }
+
+    /**
+     * EFFECTS: Set current template and CSR in use by args.
+     * REQUIRES: args.length = 2, args[0] instanceof CertificateRequest, args[1] instanceof Template
+     * MODIFIES: args[1]
+     */
+    @Override
+    public void enter(Object... args) {
+        this.incomingCSR = (CertificationRequest) args[0];
+        this.template = (Template) args[1];
+    }
+
+    /**
+     * EFFECTS: Print help.
+     */
+    @Override
+    public void help() {
+        System.out.print("show\tView the current certificate\n"
+                + "set\tSet properties or template\n"
+                + "commit\tIssue the certificate\n"
+                + "exit\tDiscard and go to main menu\n"
+                + "help\tPrint this message\n");
+    }
+
+    /**
+     * EFFECTS: Print pending cert info.
+     */
+    @Override
+    public void show() {
+        System.out.println("Requested Subject:\t" + incomingCSR.getCertificationRequestInfo().getSubject());
+        System.out.println("Subject:\t" + (template.getSubject() == null
+                ? incomingCSR.getCertificationRequestInfo().getSubject()
+                : template.getSubject()));
+        System.out.println("Template:\t" + template.getName());
+        System.out.println("Validity:\t" + template.getValidity() + " days");
+    }
+
+    /**
+     * EFFECTS: Issue the cert and log it.
+     * MODIFIES: session
+     */
+    @Override
+    public void commit() {
+        try {
+            Certificate certificate = session.getCa().signCert(incomingCSR.getCertificationRequestInfo(), template);
+            session.save();
+            System.out.println(Utils.toPEM(certificate.encodeDER(), "CERTIFICATE"));
+            session.setScreen(Screen.MAIN);
+        } catch (Throwable e) {
+            System.out.println(e.getMessage());
+        }
+    }
+
+    /**
+     * EFFECTS: Set or unset the subject.
+     * MODIFIES: this
+     */
+    private void handleIssueSetSubject(String val) {
+        try {
+            if (val == null) {
+                template = new Template(template.getName(), template.isEnabled(), (Name) null, template.getValidity());
+            } else {
+                template = new Template(template.getName(), template.isEnabled(), val, template.getValidity());
+            }
+        } catch (ParseException e) {
+            System.out.println(e.getMessage());
+        }
+    }
+
+    /**
+     * EFFECTS: Set or unset the validity.
+     * MODIFIES: this
+     */
+    private void handleIssueSetValidity(String val) {
+        if (val == null) {
+            System.out.println("Cannot unset validity");
+            return;
+        }
+        try {
+            long i = Long.parseLong(val);
+            if (i <= 0) {
+                System.out.println("Invalid validity days");
+                return;
+            }
+            template = new Template(template.getName(), template.isEnabled(), template.getSubject(), i);
+        } catch (NumberFormatException ignored) {
+            System.out.println("Invalid validity days");
+        }
+    }
+
+    /**
+     * EFFECTS: Handle the set command.
+     * MODIFIES: this
+     */
+    private void handleIssueSet(String... args) {
+        if (args.length != 2 && args.length != 3) {
+            System.out.println("Usage: set <key> <value>");
+            System.out.println("Supported keys: subject validity");
+            return;
+        }
+        String val = args.length == 3 ? args[2] : null;
+        switch (args[1]) {
+            case "subject":
+                handleIssueSetSubject(val);
+                break;
+            case "validity":
+                handleIssueSetValidity(val);
+                break;
+            default:
+                System.out.println("Unknown key");
+                break;
+        }
+    }
+
+    @Override
+    public void command(String... args) {
+        if (args[0].equals("set")) {
+            handleIssueSet(args);
+        } else {
+            help();
+        }
+    }
+
+    /**
+     * EFFECTS: Clear the certificates and return main.
+     * MODIFIES: this
+     */
+    @Override
+    public Screen exit() {
+        incomingCSR = null;
+        template = null;
+        return Screen.MAIN;
+    }
+
+    /**
+     * EFFECTS: Return "/subj/ %"
+     */
+    @Override
+    public String getPS1() {
+        return String.format("/%s/ %%", template.getSubject() == null
+                ? incomingCSR.getCertificationRequestInfo().getSubject()
+                : template.getSubject());
+    }
+}
-- 
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