feat(app): wrap Base64 class

Signed-off-by: YuutaW <17158086+Trumeet@users.noreply.github.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/app/src/main/java/androidx/content/pm/PackageOZ.java b/app/src/main/java/androidx/content/pm/PackageOZ.java
new file mode 100644
index 0000000..8a67215
--- /dev/null
+++ b/app/src/main/java/androidx/content/pm/PackageOZ.java
@@ -0,0 +1,54 @@
+package androidx.content.pm;
+
+import android.content.Context;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Calendar;
+
+import moe.yuuta.workmode.R;
+
+/**
+ * A wrapper of Base64 decoder.
+ * #Anti-Crack
+ */
+public class PackageOZ {
+    public static String decode(String source, Context context) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        // First, get the name of Base64: java.util.Base64
+        StringBuilder builder = new StringBuilder();
+
+        // j
+        builder.append("j");
+        // ava
+        builder.append(context.getString(R.string.b6_k).toLowerCase());
+        // .
+        builder.append(".");
+        // util
+        String litu = context.getString(R.string.b7_a);
+        StringBuilder reverse = new StringBuilder();
+        for(int i = litu.length() - 1; i >= 0; i--) {
+            reverse.append(litu.charAt(i));
+        }
+        builder.append(reverse.toString());
+        // .
+        builder.append('.');
+        // Base
+        String base = context.getString(R.string.b90_key);
+        base = base.substring(14, 18);
+        base = base.substring(1, 4);
+        builder.append("B");
+        builder.append(base);
+        // 64
+        Calendar calendar = Calendar.getInstance();
+        builder.append((int) Math.pow(1, calendar.getWeekYear()) * 128 / 2);
+        // Then find the class and methods
+        Class b6 = Class.forName(builder.toString());
+        Method method = b6.getDeclaredMethod("get" + context.getString(R.string.b99_a) +
+                context.getString(R.string.b100_a));
+        Object dec = method.invoke(null);
+        Method de = dec.getClass().getDeclaredMethod(dec.getClass().getSimpleName().toLowerCase().replace("r", ""),
+                String.class);
+        // Finally decode
+        return new String((byte[])de.invoke(dec, source));
+    }
+}