Fix loading contents keys of encrypted resource packs (#3925)

core/src/main/java/org/geysermc/geyser/registry/loader/ResourcePackLoader.java

@@ -146,7 +146,7 @@ public class ResourcePackLoader implements RegistryLoader<Path, Map<String, Reso
             // Check if a file exists with the same name as the resource pack suffixed by .key,
             // and set this as content key. (e.g. test.zip, key file would be test.zip.key)
             Path keyFile = path.resolveSibling(path.getFileName().toString() + ".key");
-            String contentKey = Files.exists(keyFile) ? Files.readString(path, StandardCharsets.UTF_8) : "";
+            String contentKey = Files.exists(keyFile) ? Files.readString(keyFile, StandardCharsets.UTF_8) : "";
 
             return new GeyserResourcePack(new GeyserPathPackCodec(path), manifest, contentKey);
         } catch (Exception e) {

core/src/test/java/org/geysermc/geyser/registry/loader/ResourcePackLoaderTest.java

@@ -25,11 +25,16 @@
 
 package org.geysermc.geyser.registry.loader;
 
+import org.geysermc.geyser.api.pack.ResourcePack;
 import org.junit.jupiter.api.Test;
 
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.nio.file.Path;
 import java.nio.file.PathMatcher;
+import java.util.Objects;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -54,4 +59,26 @@ public class ResourcePackLoaderTest {
         assertFalse(matcher.matches(Path.of("pack.7zip")));
         assertFalse(matcher.matches(Path.of("packs")));
     }
+
+    @Test
+    public void testPack() throws Exception {
+        // this mcpack only contains a folder, which the manifest is in
+        Path path = getResource("empty_pack.mcpack");
+        ResourcePack pack = ResourcePackLoader.readPack(path);
+        assertEquals("", pack.contentKey());
+        // should probably add some more tests here related to the manifest
+    }
+
+    @Test
+    public void testEncryptedPack() throws Exception {
+        // this zip only contains a contents.json and manifest.json at the root
+        Path path = getResource("encrypted_pack.zip");
+        ResourcePack pack = ResourcePackLoader.readPack(path);
+        assertEquals("JAGcSXcXwcODc1YS70GzeWAUKEO172UA", pack.contentKey());
+    }
+
+    private Path getResource(String name) throws URISyntaxException {
+        URL url = Objects.requireNonNull(getClass().getClassLoader().getResource(name), "No resource for name: " + name);
+        return Path.of(url.toURI());
+    }
 }

core/src/test/resources/encrypted_pack.zip.key

@@ -0,0 +1 @@
+JAGcSXcXwcODc1YS70GzeWAUKEO172UA