v0.80.30

2023-01-06 22:33:59 +04:00
parent a3cf868dfb
commit 2b31232b30
178 changed files with 5213 additions and 23780 deletions
--- a/AssetStudio/Crypto/XORShift128.cs
+++ b/AssetStudio/Crypto/XORShift128.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Buffers.Binary;
+
+namespace AssetStudio
+{
+    public static class XORShift128
+    {
+        public static bool Init = false;
+        public static uint x = 0, y = 0, z = 0, w = 0, initseed = 0;
+
+        const long SEED = 0x61C8864E7A143579;
+        const uint MT19937 = 0x6C078965;
+
+        public static void InitSeed(uint seed)
+        {
+            initseed = seed;
+            x = seed;
+            y = MT19937 * x + 1;
+            z = MT19937 * y + 1;
+            w = MT19937 * z + 1;
+            Init = true;
+        }
+
+        public static uint XORShift()
+        {
+            uint t = x ^ (x << 11);
+            x = y; y = z; z = w;
+            return w = w ^ (w >> 19) ^ t ^ (t >> 8);
+        }
+
+        public static uint NextUInt32()
+        {
+            return XORShift();
+        }
+
+        public static int NextDecryptInt() => BinaryPrimitives.ReadInt32LittleEndian(NextDecrypt(4));
+        public static uint NextDecryptUInt() => BinaryPrimitives.ReadUInt32LittleEndian(NextDecrypt(4));
+
+        public static long NextDecryptLong() => BinaryPrimitives.ReadInt64LittleEndian(NextDecrypt(8));
+
+        public static byte[] NextDecrypt(int size)
+        {
+            var valueBytes = new byte[size];
+            var key = size * initseed - SEED;
+            var keyBytes = BitConverter.GetBytes(key);
+            for (int i = 0; i < size; i++)
+            {
+                var val = NextUInt32();
+                valueBytes[i] = keyBytes[val % 8];
+            }
+            return valueBytes;
+        }
+    }
+}