tls: fix convertALPNProtocols accepting ArrayBufferViews

PR-URL: nodejs#43211
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

lib/tls.js

@@ -54,7 +54,11 @@ const {
 } = require('internal/errors').codes;
 const internalUtil = require('internal/util');
 internalUtil.assertCrypto();
-const { isArrayBufferView } = require('internal/util/types');
+const {
+  isArrayBufferView,
+  isDataView,
+  isUint8Array,
+} = require('internal/util/types');
 
 const net = require('net');
 const { getOptionValue } = require('internal/options');
@@ -143,9 +147,16 @@ exports.convertALPNProtocols = function convertALPNProtocols(protocols, out) {
   // If protocols is Array - translate it into buffer
   if (ArrayIsArray(protocols)) {
     out.ALPNProtocols = convertProtocols(protocols);
-  } else if (isArrayBufferView(protocols)) {
+  } else if (Buffer.isBuffer(protocols) || isUint8Array(protocols)) {
     // Copy new buffer not to be modified by user.
     out.ALPNProtocols = Buffer.from(protocols);
+  } else if (isDataView(protocols)) {
+    out.ALPNProtocols = Buffer.from(protocols.buffer.slice(
+      protocols.byteOffset,
+      protocols.byteOffset + protocols.byteLength
+    ));
+  } else if (isArrayBufferView(protocols)) {
+    out.ALPNProtocols = Buffer.from(protocols.slice().buffer);
   }
 };
 

test/parallel/test-tls-basic-validations.js

@@ -103,8 +103,11 @@ assert.throws(
   const inputBuffer = Buffer.from(arrayBufferViewStr.repeat(8), 'utf8');
   for (const expectView of common.getArrayBufferViews(inputBuffer)) {
     const out = {};
+    const expected = Buffer.from(expectView.buffer.slice(),
+                                 expectView.byteOffset,
+                                 expectView.byteLength);
     tls.convertALPNProtocols(expectView, out);
-    assert(out.ALPNProtocols.equals(Buffer.from(expectView)));
+    assert(out.ALPNProtocols.equals(expected));
   }
 }