add footer, contact button

index.html

@@ -41,6 +41,9 @@
   <meta name="msapplication-TileImage" content="favicon.png?3">
   <meta name="theme-color" content="#67EA94">
 
+  <!-- Scripts -->
+  <script src="link-aes.js" defer></script>
+
   <title>CT Mesh</title>
   
   <style>
@@ -72,8 +75,8 @@
     .splash-box {
       background-color: #EBEBEB;
       border-radius: 30px;
-      padding: 3em;
-      margin: 1em;
+      padding: 3em 3em 2em 3em;
+      margin: 1em auto 0 auto;
       box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
       color: #000000;
       position: relative;
@@ -88,7 +91,7 @@
       justify-content: center;
       gap: 1em;
       width: 100%;
-      padding-bottom: 35px;
+      padding-bottom: 15px;
     }
     .logo {
       width: 200px;
@@ -149,6 +152,31 @@
       flex-direction: column;
       gap: 1em;
     }
+    .btn-small {
+      display: inline-block;
+      margin-top: 0.5em;
+      color: #fff;
+      background-color: #2C2D3C;
+      font-weight: bold;
+      text-decoration: none;
+      padding: 0.5em 1.25em;
+      border-radius: 15px;
+    }
+    .site-footer {
+      margin-top: 2em;
+      padding-top: 2em;
+      text-align: center;
+      font-size: 0.875rem;
+      color: #2C2D3C;
+      border-top: 1px solid #ccc;
+    }
+    .site-footer a {
+      color: #757684;
+      text-decoration: none;
+    }
+    .site-footer a:hover {
+      text-decoration: underline;
+    }
     
     /* Adjustments for devices with a viewport width of 800px or less */
     @media (max-width: 800px) {
@@ -212,7 +240,7 @@
       <div class="text-content">
         <h1>CT Mesh</h1>
         <p class="sub-header">Connecticut Meshtastic User Group</p>
-        <p>Join the local community!</p>
+        <a href="Ws9mCBVzpuQdAEBDZLxJxNbKOflt64pOog" rel="nofollow noindex" class="btn-small link-aes">Contact</a>
       </div>
     </div>
     <div class="btn-groups">
@@ -252,6 +280,10 @@
         </a>
       </div>
     </div>
+    <footer class="site-footer">
+      <p><a href="https://ctmesh.org/">CT Mesh</a> is a volunteer-run user group for <a href="https://meshtastic.org" target="_blank">Meshtastic</a> enthusiasts in Connecticut.</p>
+      <p><a href="https://creativecommons.org/licenses/by-sa/4.0/" target="_blank" rel="noopener">Content licensed CC BY-SA 4.0</a></p>
+    </footer>
   </div>
 </body>
 </html>

link-aes.js

@@ -0,0 +1,236 @@
+'use strict';
+
+document.addEventListener('DOMContentLoaded', function ()
+{
+	const keyText = '1CnBWwQtMAwRP8E0mZLkRxywSisGedf3XzyHmCIK1BM';
+
+    const onGetKey = function (key)
+	{
+		const coder = new AesLinkCoder(key);
+
+		document.querySelectorAll('.link-aes')
+			.forEach(coder.decode.bind(coder));
+	};
+
+	if ('subtle' in window.crypto) {
+		Aes.getKey(keyText).then(onGetKey);
+	} else {
+		console.log('AES encryption is only available in secure contexts (such as over https or localhost)');
+	}
+});
+
+
+// Aes
+
+const Aes = {
+	'KEY_BITS': 256, // 128 (SECRET) | 192 (TOP SECRET) | 256 (TOP SECRET)
+	'NONCE_BYTES': 3, // 3 bytes = 16,777,216 possible nonces
+	'BLOCK_BYTES': 16, // Required by AES
+	'BITS_PER_BYTE': 8 // Conversion factor
+};
+
+Aes.newKeyText = async function ()
+{
+	const options = {
+		'name': 'AES-CTR',
+		'length': Aes.KEY_BITS
+	};
+
+	const key = await window.crypto.subtle.generateKey(options, true, ['encrypt', 'decrypt']);
+	const keyBuffer = await window.crypto.subtle.exportKey('raw', key);
+	const keyBytes = new Uint8Array(keyBuffer);
+	const keyText = Base64.text(keyBytes);
+
+	return keyText;
+}
+
+Aes.getKey = async function (keyText)
+{
+	const options = {
+		'name': 'AES-CTR'
+	};
+
+	const keyBytes = Base64.bytes(keyText);
+	const key = window.crypto.subtle.importKey('raw', keyBytes, options, false, ['encrypt', 'decrypt']);
+
+	return key;
+}
+
+Aes.encrypt = async function (plainText, key)
+{
+	const nonceBytes = Aes.__newNonce();
+	const counterBytes = Aes.__newCounter(nonceBytes);
+	const options = Aes.__newOptions(counterBytes);
+	const encoder = new TextEncoder();
+	const plainBytes = encoder.encode(plainText);
+	const codeBuffer = await window.crypto.subtle.encrypt(options, key, plainBytes);
+	const codeBytes = new Uint8Array(codeBuffer);
+	const outputBytes = new Uint8Array(nonceBytes.length + codeBytes.length);
+	outputBytes.set(nonceBytes);
+	outputBytes.set(codeBytes, nonceBytes.length);
+	const outputText = Base64.text(outputBytes);
+
+	return outputText;
+}
+
+Aes.__newNonce = function ()
+{
+	const nonce = new Uint8Array(Aes.NONCE_BYTES);
+	window.crypto.getRandomValues(nonce);
+
+	return nonce;
+}
+
+Aes.__newCounter = function (nonce)
+{
+	const counter = new Uint8Array(Aes.BLOCK_BYTES);
+	counter.set(nonce);
+
+	return counter;
+}
+
+Aes.__newOptions = function (counter)
+{
+	return {
+		'name': 'AES-CTR',
+		'counter': counter,
+		'length': (Aes.BLOCK_BYTES - Aes.NONCE_BYTES) * Aes.BITS_PER_BYTE
+	};
+}
+
+Aes.decrypt = async function (inputText, key)
+{
+	const inputBytes = Base64.bytes(inputText);
+	const nonceBytes = inputBytes.slice(0, Aes.NONCE_BYTES);
+	const codeBytes = inputBytes.slice(Aes.NONCE_BYTES);
+	const counterBytes = Aes.__newCounter(nonceBytes);
+	const options = Aes.__newOptions(counterBytes);
+	const plainBytes = await window.crypto.subtle.decrypt(options, key, codeBytes);
+	const decoder = new TextDecoder();
+	const plainText = decoder.decode(plainBytes);
+
+	return plainText;
+}
+
+
+// Base64
+
+const Base64 = {};
+
+Base64.bytes = function (text)
+{
+	const values = Base64.__getValues(text);
+	const bytes = Base64.__getBytes(values);
+
+	return bytes;
+}
+
+Base64.__getValues = function (text)
+{
+	const values = new Uint8Array(text.length);
+
+	for (let i = 0; i < text.length; ++i) {
+		const code = text.charCodeAt(i);
+
+		values[i] = Base64.__getValue(code);
+	}
+
+	return values;
+}
+
+Base64.__getValue = function (code)
+{
+	if (code === 45) {
+		return 63;
+	}
+
+	if (code < 58) {
+		return code - 48;
+	}
+
+	if (code < 91) {
+		return code - 29;
+	}
+
+	if (code === 95) {
+		return 62;
+	}
+
+	return code - 87;
+}
+
+Base64.__getBytes = function (values)
+{
+	const length = Math.floor(3 * values.length / 4);
+	const bytes = new Uint8Array(length);
+
+	for (let i = 0, j = 0; i < values.length; ++i) {
+		const r = 2 * (i % 4);
+
+		if (r !== 0) {
+			bytes[j++] = ((values[i-1] << r) & 0xff) | (values[i] >> (6 - r));
+		}
+	}
+
+	return bytes;
+}
+
+Base64.text = function (bytes)
+{
+	let text = '';
+
+	for (let i = 0; i < bytes.length; ++i) {
+		const r = i % 3;
+
+		if (r === 0) {
+			text += Base64.__getSymbol(bytes[i] >> 2) + Base64.__getSymbol(((bytes[i] << 4) & 63) | (bytes[i+1] >> 4));
+		} else if (r === 1) {
+			text += Base64.__getSymbol(((bytes[i] << 2) & 63) | (bytes[i+1] >> 6));
+		} else {
+			text += Base64.__getSymbol(bytes[i] & 63);
+		}
+	}
+
+	return text;
+}
+
+Base64.__getSymbol = function (value)
+{
+	if (value < 10) {
+		return String.fromCharCode(48 + value);
+	}
+
+	if (value < 36) {
+		return String.fromCharCode(87 + value);
+	}
+
+	if (value < 62) {
+		return String.fromCharCode(29 + value);
+	}
+
+	if (value === 62) {
+		return '_';
+	}
+
+	return '-';
+}
+
+
+// AesLinkCoder
+
+function AesLinkCoder (key)
+{
+	this.key = key;
+}
+
+AesLinkCoder.prototype.decode = function (node)
+{
+	Aes.decrypt(node.getAttribute('href'), this.key)
+		.then(node.setAttribute.bind(node, 'href'));
+}
+
+AesLinkCoder.prototype.encode = function (node)
+{
+	Aes.encrypt(node.getAttribute('href'), this.key)
+		.then(node.setAttribute.bind(node, 'href'));
+}