sea: handle NUL bytes in asset keys

Construct the asset lookup string_view with the explicit Utf8Value
length so embedded NUL bytes do not truncate keys.

Signed-off-by: Archkon <180910180+Archkon@users.noreply.github.com>

Author: Archkon

src/node_sea.cc

@@ -829,7 +829,7 @@ void GetAsset(const FunctionCallbackInfo<Value>& args) {
   if (sea_resource.assets.empty()) {
     return;
   }
-  auto it = sea_resource.assets.find(*key);
+  auto it = sea_resource.assets.find(std::string_view(*key, key.length()));
   if (it == sea_resource.assets.end()) {
     return;
   }

test/fixtures/sea/assets/sea-config.json

@@ -2,6 +2,8 @@
   "main": "sea.js",
   "output": "sea-prep.blob",
   "assets": {
+    "a": "utf8_test_text.txt",
+    "a\u0000b": "person.jpg",
     "utf8_test_text.txt": "utf8_test_text.txt",
     "person.jpg": "person.jpg"
   }

test/fixtures/sea/assets/sea.js

@@ -54,6 +54,12 @@ assert(isSea());
 const textAssetOnDisk = readFileSync(process.env.__TEST_UTF8_TEXT_PATH, 'utf8');
 const binaryAssetOnDisk = readFileSync(process.env.__TEST_PERSON_JPG);
 
+// Check asset keys containing NUL.
+{
+  assert.strictEqual(getAsset('a', 'utf8'), textAssetOnDisk);
+  assert.deepStrictEqual(Buffer.from(getAsset('a\0b')), binaryAssetOnDisk);
+}
+
 // Check getAsset() buffer copies.
 {
   // Check that the asset embedded is the same as the original.