tls: fix convertALPNProtocols accepting ArrayBufferViews

LiviaMedeiros · LiviaMedeiros · commit 15930c1e5927 · 2022-05-27T00:04:54.000+08:00
diff --git a/lib/tls.js b/lib/tls.js
@@ -54,7 +54,10 @@ const {
 } = require('internal/errors').codes;
 const internalUtil = require('internal/util');
 internalUtil.assertCrypto();
-const { isArrayBufferView } = require('internal/util/types');
+const {
+  isArrayBufferView,
+  isUint8Array,
+} = require('internal/util/types');
 
 const net = require('net');
 const { getOptionValue } = require('internal/options');
@@ -143,9 +146,13 @@ 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 (isArrayBufferView(protocols)) {
+    out.ALPNProtocols = Buffer.from(protocols.buffer.slice(),
+                                    protocols.byteOffset,
+                                    protocols.byteLength);
   }
 };
 
diff --git a/test/parallel/test-tls-basic-validations.js b/test/parallel/test-tls-basic-validations.js
@@ -103,8 +103,16 @@ assert.throws(
   const inputBuffer = Buffer.from(arrayBufferViewStr.repeat(8), 'utf8');
   for (const expectView of common.getArrayBufferViews(inputBuffer)) {
     const out = {};
+    let expected;
+    if (expectView.constructor === Uint8Array) {
+      expected = Buffer.from(expectView);
+    } else {
+      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));
   }
 }
 
