From 6c189eb8f2e10cf743d2304ce9b1cb72eaea9788 Mon Sep 17 00:00:00 2001
From: Brandon Rozek <brozek@brandonrozek.com>
Date: Mon, 30 Dec 2024 19:27:51 -0500
Subject: [PATCH] Added verification to contact form

---
 layouts/shortcodes/pgpform.html   | 44 ++++++++++++++++++-------------
 layouts/shortcodes/pgpverify.html | 39 +++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 18 deletions(-)
 create mode 100644 layouts/shortcodes/pgpverify.html

diff --git a/layouts/shortcodes/pgpform.html b/layouts/shortcodes/pgpform.html
index 0b12d37..213ba04 100644
--- a/layouts/shortcodes/pgpform.html
+++ b/layouts/shortcodes/pgpform.html
@@ -6,26 +6,34 @@
 Encrypted Result:
 <pre id="pgpresult" class="pgpform"></pre>
 <script>
-function encrypt() {
-    let textarea = document.querySelector("#pgpcleartext");
+async function encrypt() {
     let resultarea = document.querySelector('#pgpresult');
-    let pubKeyURL = "{{ .Get 0 }}";
     resultarea.textContent = "";
-    fetch(pubKeyURL).then(function(response) {
-        return response.text().then(function(text) {
-            const pubKey = openpgp.readKey({ armoredKey: text });
-            const message = openpgp.createMessage({ text: textarea.value })
-            return Promise.all([message, pubKey]).then(function(mp) {
-                const encryptionParameters = {
-                    message: mp[0],
-                    encryptionKeys: mp[1]
-                };
-                return openpgp.encrypt(encryptionParameters).then(function(encryptedMessage) {
-                    resultarea.textContent = encryptedMessage;
-                });
-            });
-        });    
-    });
+
+    let textarea = document.querySelector("#pgpcleartext");
+    if (textarea.value.length == 0) {
+        return;
+    }
+
+    let pubKeyURL = "{{ .Get 0 }}";
+    let pubKey;
+
+    try {
+        const response = await fetch(pubKeyURL);
+        const text = await response.text();
+        pubKey = await openpgp.readKey({ armoredKey: text });
+    } catch {
+        resultarea.textContent = "Error: Unable to obtain key";
+    }
+
+    try {
+        const message = await openpgp.createMessage({ text: textarea.value });
+        const encryptedMessage = await openpgp.encrypt({message: message, encryptionKeys: pubKey});
+        resultarea.textContent = encryptedMessage;
+    } catch {
+        resultarea.textContent = "Error: Unable to encrypt message"
+    }
+
 }
 
 function genEmail() {
diff --git a/layouts/shortcodes/pgpverify.html b/layouts/shortcodes/pgpverify.html
new file mode 100644
index 0000000..d0cff19
--- /dev/null
+++ b/layouts/shortcodes/pgpverify.html
@@ -0,0 +1,39 @@
+{{- $openPGP := resources.Get "js/openpgp.min.js" -}}
+<script src="{{ $openPGP.Permalink }}"></script>
+<textarea id="pgpsignedtext" class="pgpform" style="width: 100%; min-height: 10rem;"></textarea>
+<button class="pgpverifybutton" onclick="verify()">Verify</button>
+<br/>
+Verification Result:
+<pre id="pgpverifyresult" class="pgpform"></pre>
+<script>
+async function verify() {
+    let resultarea = document.querySelector('#pgpverifyresult');
+    resultarea.textContent = "";
+
+    let textarea = document.querySelector("#pgpsignedtext");
+    if (textarea.value.length == 0) {
+        return;
+    }
+
+    let pubKeyURL = "{{ .Get 0 }}";
+    let pubKey;
+
+    try {
+        const response = await fetch(pubKeyURL);
+        const text = await response.text();
+        pubKey = await openpgp.readKey({ armoredKey: text });
+    } catch {
+        resultarea.textContent = "Error: Unable to obtain key";
+    }
+
+    try {
+        const message = await openpgp.readCleartextMessage({ cleartextMessage: textarea.value });
+        const verifyResult = await openpgp.verify({message: message, verificationKeys: pubKey});
+        const validResult = await verifyResult.signatures[0].verified;
+        resultarea.textContent = (validResult)? "Valid": "Invalid";
+    } catch {
+        resultarea.textContent = "Invalid";
+    }
+
+}
+</script>