feat(TLSA): prettify TLSA

lib/index.js

@@ -247,6 +247,9 @@ function prettify(msg) {
         case 'DS':
           rr.data.digest = rr.data.digest.toString('hex');
           break;
+        case 'TLSA':
+          rr.data.certificate = rr.data.certificate.toString('hex');
+          break;
         case 'NSEC3':
           rr.data.salt = rr.data.salt.toString('hex');
           rr.data.nextDomain = base32Encode(rr.data.nextDomain, 'RFC4648-HEX').replace('=', '')

lib/index.spec.js

@@ -1,4 +1,4 @@
-const {makeQuery, DohResolver, sendDohMsg, MethodNotAllowedError, isMethodAllowed, dnsPacket} = require('.');
+const {makeQuery, DohResolver, sendDohMsg, MethodNotAllowedError, isMethodAllowed, dnsPacket, prettify} = require('.');
 
 test('DNS query message should be created', () => {
   expect(makeQuery('example.com')).toBeTruthy();
@@ -65,6 +65,21 @@ test('DohResolver.query() for example.com TXT contains answers', async () => {
   }
 });
 
+test('prettify can handle TLSA', async () => {
+  // From '_443._tcp.good.dane.huque.com', 'TLSA'
+  const data = Buffer.from('000081800001000100000000045f343433045f74637004676f6f640464616e6505687571756503636f6d0000340001c00c0034000100001c2000230301016e8d1119ab26b6ef204b33a4036f2835cab86b0833f36ee96642e5703b74486c', 'hex')
+  const msg = dnsPacket.decode(data);
+
+  try {
+    let response = prettify(msg);
+    expect(response.answers).toHaveLength(1);
+    expect(response.answers[0].data).toHaveProperty('certificate');
+    expect(typeof response.answers[0].data.certificate).toBe('string')
+  } catch(err) {
+      throw err;
+  }
+});
+
 test('timeout works properly (and cloudflare doesn\'t respond within 1 millisecond)', async () => {
   let msg = makeQuery('example.org');
   try {

package.json

@@ -7,7 +7,7 @@
     "argparse": "^1.0.10",
     "base32-encode": "^1.1.1",
     "browserify": "^16.5.0",
-    "dns-packet": "^5.2.1",
+    "dns-packet": "^5.6.1",
     "glob-parent": "^5.1.2",
     "ws": "^7.4.6"
   },