scripts

2026-06-04 11:42:34 +02:00
parent f39ba70a9f
commit e720b98cd1
7488 changed files with 2493818 additions and 0 deletions
@@ -0,0 +1,53 @@
+using System;
+using ICSharpCode.SharpZipLib.Checksums;
+
+namespace ICSharpCode.SharpZipLib.Encryption
+{
+	// Token: 0x02000021 RID: 33
+	internal class PkzipClassicCryptoBase
+	{
+		// Token: 0x060000E2 RID: 226 RVA: 0x00007BE0 File Offset: 0x00006BE0
+		protected byte TransformByte()
+		{
+			uint num = (this.keys[2] & 65535U) | 2U;
+			return (byte)(num * (num ^ 1U) >> 8);
+		}
+
+		// Token: 0x060000E3 RID: 227 RVA: 0x00007C08 File Offset: 0x00006C08
+		protected void SetKeys(byte[] keyData)
+		{
+			if (keyData == null)
+			{
+				throw new ArgumentNullException("keyData");
+			}
+			if (keyData.Length != 12)
+			{
+				throw new InvalidOperationException("Key length is not valid");
+			}
+			this.keys = new uint[3];
+			this.keys[0] = (uint)(((int)keyData[3] << 24) | ((int)keyData[2] << 16) | ((int)keyData[1] << 8) | (int)keyData[0]);
+			this.keys[1] = (uint)(((int)keyData[7] << 24) | ((int)keyData[6] << 16) | ((int)keyData[5] << 8) | (int)keyData[4]);
+			this.keys[2] = (uint)(((int)keyData[11] << 24) | ((int)keyData[10] << 16) | ((int)keyData[9] << 8) | (int)keyData[8]);
+		}
+
+		// Token: 0x060000E4 RID: 228 RVA: 0x00007CA4 File Offset: 0x00006CA4
+		protected void UpdateKeys(byte ch)
+		{
+			this.keys[0] = Crc32.ComputeCrc32(this.keys[0], ch);
+			this.keys[1] = this.keys[1] + (uint)((byte)this.keys[0]);
+			this.keys[1] = this.keys[1] * 134775813U + 1U;
+			this.keys[2] = Crc32.ComputeCrc32(this.keys[2], (byte)(this.keys[1] >> 24));
+		}
+
+		// Token: 0x060000E5 RID: 229 RVA: 0x00007D1A File Offset: 0x00006D1A
+		protected void Reset()
+		{
+			this.keys[0] = 0U;
+			this.keys[1] = 0U;
+			this.keys[2] = 0U;
+		}
+
+		// Token: 0x04000089 RID: 137
+		private uint[] keys;
+	}
+}