检测到系统 zlib 实现为 zlib-ng 时跳过 Forge/NeoForge 安装时的哈希检测

HMCL/src/main/java/org/jackhuang/hmcl/Launcher.java

@@ -42,10 +42,7 @@
 import org.jackhuang.hmcl.theme.Themes;
 import org.jackhuang.hmcl.upgrade.UpdateChecker;
 import org.jackhuang.hmcl.upgrade.UpdateHandler;
-import org.jackhuang.hmcl.util.CrashReporter;
-import org.jackhuang.hmcl.util.FileSaver;
-import org.jackhuang.hmcl.util.Lang;
-import org.jackhuang.hmcl.util.StringUtils;
+import org.jackhuang.hmcl.util.*;
 import org.jackhuang.hmcl.util.io.JarUtils;
 import org.jackhuang.hmcl.util.platform.*;
 
@@ -347,6 +344,8 @@ public static void main(String[] args) {
                 LOG.info("XDG Current Desktop: " + System.getenv("XDG_CURRENT_DESKTOP"));
             }
 
+            LOG.info("Zlib Compatible: " + ZlibUtils.IS_ZLIB_COMPATIBLE);
+
             Lang.thread(SystemInfo::initialize, "Detection System Information", true);
 
             launch(Launcher.class, args);

HMCLCore/src/main/java/org/jackhuang/hmcl/download/forge/ForgeNewInstallTask.java

@@ -33,6 +33,7 @@
 import org.jackhuang.hmcl.task.Task;
 import org.jackhuang.hmcl.util.DigestUtils;
 import org.jackhuang.hmcl.util.StringUtils;
+import org.jackhuang.hmcl.util.ZlibUtils;
 import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 import org.jackhuang.hmcl.util.gson.JsonUtils;
 import org.jackhuang.hmcl.util.io.ChecksumMismatchException;
@@ -168,6 +169,22 @@ public void execute() throws Exception {
                 }
 
                 if (!Objects.equals(code, entry.getValue())) {
+                    if (!ZlibUtils.IS_ZLIB_COMPATIBLE && FileUtils.getExtension(artifact).equals("jar")) {
+                        // Forge/NeoForge generates JARs dynamically during installation.
+                        // When native compression libraries such as zlib-ng are in use,
+                        // the resulting JAR may be compressed differently, causing its
+                        // SHA-1 hash to differ from the expected value recorded in the
+                        // install profile. In this case, fall back to verifying that the
+                        // file is at least a structurally valid ZIP/JAR archive.
+                        try {
+                            FileDownloadTask.ZIP_INTEGRITY_CHECK_HANDLER.checkIntegrity(artifact, artifact);
+                            LOG.info("Ignoring SHA-1 mismatch for " + artifact + " due to non-standard zlib compression output");
+                            continue;
+                        } catch (Exception ignored) {
+                        }
+                    }
+
+
                     Files.delete(artifact);
                     throw new ChecksumMismatchException("SHA-1", entry.getValue(), code);
                 }

HMCLCore/src/main/java/org/jackhuang/hmcl/util/ZlibUtils.java

@@ -0,0 +1,77 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2026 huangyuhui <huanghongxun2008@126.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.jackhuang.hmcl.util;
+
+import org.jetbrains.annotations.NotNullByDefault;
+
+import java.util.Arrays;
+import java.util.zip.Deflater;
+
+/// Utilities for detecting the compatibility of the system's zlib implementation.
+///
+/// Some systems replace the JVM's default zlib with an alternative such as zlib-ng,
+/// which may produce compressed output that differs byte-for-byte from the output of
+/// the standard zlib. This can cause hash mismatches when verifying artifacts whose
+/// expected checksums were computed with a specific zlib implementation.
+///
+/// @author Glavo
+@NotNullByDefault
+public final class ZlibUtils {
+
+    /// Whether the JVM's [Deflater] produces output that is byte-for-byte identical
+    /// to the expected output of the standard reference zlib for a known test vector.
+    ///
+    /// This flag is `true` when the system's zlib behaves like the standard reference
+    /// implementation, and `false` when an alternative library such as zlib-ng is in
+    /// use and may produce different compressed bytes.
+    ///
+    /// When this flag is `false`, hash verification for dynamically generated JAR
+    /// files (e.g., those produced by the Forge/NeoForge installer processors) may
+    /// be relaxed to a structural integrity check rather than an exact hash match,
+    /// because the alternative zlib may legitimately produce files with different
+    /// checksums.
+    public static boolean IS_ZLIB_COMPATIBLE;
+
+    static {
+        var expectedCompressed = new byte[]{120, -100, 99, 96, 0, 2, 0, 0, 5, 0, 1};
+        byte[] compressed = new byte[64];
+        int compressedLength = 0;
+
+        var deflater = new Deflater();
+        try {
+            deflater.setInput(new byte[5]);
+            deflater.finish();
+
+            while (!deflater.finished()) {
+                compressedLength += deflater.deflate(compressed, compressedLength, compressed.length - compressedLength);
+            }
+        } finally {
+            deflater.end();
+        }
+
+        IS_ZLIB_COMPATIBLE = Arrays.equals(
+                expectedCompressed,
+                0, expectedCompressed.length,
+                compressed,
+                0, compressedLength
+        );
+    }
+
+    private ZlibUtils() {
+    }
+}