src: handle null backing store in ArrayBufferViewContents::Read

Fixes: https://github.com/nodejs/node/issues/62342

src: handle null backing store in ArrayBufferViewContents::Read
PR-URL: https://github.com/nodejs/node/pull/62343
Fixes: https://github.com/nodejs/node/issues/62342
Reviewed-By: René <contact.9a5d6388@renegade334.me.uk>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

src/util-inl.h

@@ -591,7 +591,9 @@ void ArrayBufferViewContents<T, S>::Read(v8::Local<v8::ArrayBufferView> abv) {
   static_assert(sizeof(T) == 1, "Only supports one-byte data at the moment");
   length_ = abv->ByteLength();
   if (length_ > sizeof(stack_storage_) || abv->HasBuffer()) {
-    data_ = static_cast<T*>(abv->Buffer()->Data()) + abv->ByteOffset();
+    auto buf_data = abv->Buffer()->Data();
+    data_ = buf_data != nullptr ? static_cast<T*>(buf_data) + abv->ByteOffset()
+                                : stack_storage_;
   } else {
     abv->CopyContents(stack_storage_, sizeof(stack_storage_));
     data_ = stack_storage_;

test/parallel/test-crypto-authenticated.js

@@ -772,3 +772,26 @@ for (const test of TEST_CASES) {
     decipher.final();
   }, /Unsupported state or unable to authenticate data/);
 }
+
+// Refs: https://github.com/nodejs/node/issues/62342
+{
+  const key = crypto.randomBytes(16);
+  const nonce = crypto.randomBytes(13);
+
+  const cipher = crypto.createCipheriv('aes-128-ccm', key, nonce, {
+    authTagLength: 16,
+  });
+  cipher.setAAD(Buffer.alloc(0), { plaintextLength: 0 });
+  cipher.update(new DataView(new ArrayBuffer(0)));
+  cipher.final();
+  const tag = cipher.getAuthTag();
+  assert.strictEqual(tag.length, 16);
+
+  const decipher = crypto.createDecipheriv('aes-128-ccm', key, nonce, {
+    authTagLength: 16,
+  });
+  decipher.setAuthTag(tag);
+  decipher.setAAD(Buffer.alloc(0), { plaintextLength: 0 });
+  decipher.update(new DataView(new ArrayBuffer(0)));
+  decipher.final();
+}