27Aug2021-Cpp2IL-Dump/Assembly-CSharp/BestHTTP/SecureProtocol/Org/BouncyCastle/Crypto/Engines/RC4Engine.cs

using System;
using Cpp2IlInjected;

namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines
{
	// Token: 0x02001D7D RID: 7549
	[Token(Token = "0x2001D7D")]
	public class RC4Engine : IStreamCipher
	{
		// Token: 0x0600BBEF RID: 48111 RVA: 0x00297794 File Offset: 0x00295994
		[Token(Token = "0x600BBEF")]
		[Address(RVA = "0x272E1F0", Offset = "0x272D1F0", VA = "0x18272E1F0", Slot = "9")]
		public virtual void Init(bool forEncryption, ICipherParameters parameters)
		{
			/*
An exception occurred when decompiling this method (0600BBEF)

ICSharpCode.Decompiler.DecompilerException: Error decompiling System.Void BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines.RC4Engine::Init(System.Boolean,BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.ICipherParameters)

 ---> System.Exception: Basic block has to end with unconditional control flow. 
{
	IL_25:
	stloc:ArgumentException(var_5_36, newobj:ArgumentException(ArgumentException::.ctor, call:string(string::Concat, ldstr:string("invalid parameter passed to RC4 init - "), ldloc:string(var_4))))
}

   at ICSharpCode.Decompiler.ILAst.ILAstOptimizer.FlattenBasicBlocks(ILNode node) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\ILAst\ILAstOptimizer.cs:line 1852
   at ICSharpCode.Decompiler.ILAst.ILAstOptimizer.Optimize(DecompilerContext context, ILBlock method, AutoPropertyProvider autoPropertyProvider, StateMachineKind& stateMachineKind, MethodDef& inlinedMethod, AsyncMethodDebugInfo& asyncInfo, ILAstOptimizationStep abortBeforeStep) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\ILAst\ILAstOptimizer.cs:line 355
   at ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(IEnumerable`1 parameters, MethodDebugInfoBuilder& builder) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\Ast\AstMethodBodyBuilder.cs:line 123
   at ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(MethodDef methodDef, DecompilerContext context, AutoPropertyProvider autoPropertyProvider, IEnumerable`1 parameters, Boolean valueParameterIsKeyword, StringBuilder sb, MethodDebugInfoBuilder& stmtsBuilder) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\Ast\AstMethodBodyBuilder.cs:line 88
   --- End of inner exception stack trace ---
   at ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(MethodDef methodDef, DecompilerContext context, AutoPropertyProvider autoPropertyProvider, IEnumerable`1 parameters, Boolean valueParameterIsKeyword, StringBuilder sb, MethodDebugInfoBuilder& stmtsBuilder) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\Ast\AstMethodBodyBuilder.cs:line 92
   at ICSharpCode.Decompiler.Ast.AstBuilder.AddMethodBody(EntityDeclaration methodNode, EntityDeclaration& updatedNode, MethodDef method, IEnumerable`1 parameters, Boolean valueParameterIsKeyword, MethodKind methodKind) in D:\a\dnSpy\dnSpy\Extensions\ILSpy.Decompiler\ICSharpCode.Decompiler\ICSharpCode.Decompiler\Ast\AstBuilder.cs:line 1663
*/;
		}

		// Token: 0x17001D7B RID: 7547
		// (get) Token: 0x0600BBF0 RID: 48112 RVA: 0x002977D8 File Offset: 0x002959D8
		[Token(Token = "0x17001D7B")]
		public virtual string AlgorithmName
		{
			[Token(Token = "0x600BBF0")]
			[Address(RVA = "0x272E9D0", Offset = "0x272D9D0", VA = "0x18272E9D0", Slot = "10")]
			get
			{
				return "RC4";
			}
		}

		// Token: 0x0600BBF1 RID: 48113 RVA: 0x002977EC File Offset: 0x002959EC
		[Token(Token = "0x600BBF1")]
		[Address(RVA = "0x272E600", Offset = "0x272D600", VA = "0x18272E600", Slot = "11")]
		public virtual byte ReturnByte(byte input)
		{
			int num = this.x;
			byte[] array = this.engineState;
			num++;
			this.x = num;
			byte b;
			this.y = (int)b;
			int length = array.Length;
			byte[] array2 = this.engineState;
			int num2 = this.y;
			byte[] array3 = this.engineState;
			int num3 = this.x;
			int length2 = array3.Length;
			int num4 = this.y;
			byte b2;
			byte b3;
			b2 += b3;
			b3 = b2;
			byte b4;
			return b4;
		}

		// Token: 0x0600BBF2 RID: 48114 RVA: 0x00297864 File Offset: 0x00295A64
		[Token(Token = "0x600BBF2")]
		[Address(RVA = "0x272E380", Offset = "0x272D380", VA = "0x18272E380", Slot = "12")]
		public virtual void ProcessBytes(byte[] input, int inOff, int length, byte[] output, int outOff)
		{
			Check.DataLength(input, inOff, inOff, "input buffer too short");
			if (length > 0)
			{
				int num = this.x;
				byte[] array = this.engineState;
				num++;
				this.x = num;
				byte b;
				this.y = (int)b;
				int length2 = array.Length;
				byte[] array2 = this.engineState;
				int num2 = this.y;
				byte[] array3 = this.engineState;
				int num3 = this.x;
				int length3 = array3.Length;
				int num4 = this.y;
				byte b2;
				byte b3;
				b2 += b3;
			}
		}

		// Token: 0x0600BBF3 RID: 48115 RVA: 0x002978EC File Offset: 0x00295AEC
		[Token(Token = "0x600BBF3")]
		[Address(RVA = "0x272E5F0", Offset = "0x272D5F0", VA = "0x18272E5F0", Slot = "13")]
		public virtual void Reset()
		{
			byte[] array = this.workingKey;
			this.SetKey(array);
		}

		// Token: 0x0600BBF4 RID: 48116 RVA: 0x00297908 File Offset: 0x00295B08
		[Token(Token = "0x600BBF4")]
		[Address(RVA = "0x272E770", Offset = "0x272D770", VA = "0x18272E770")]
		private void SetKey(byte[] keyBytes)
		{
			int num = 0;
			this.workingKey = keyBytes;
			this.x = num;
			if (this.engineState == num)
			{
				byte[] array = new byte[RC4Engine.STATE_LENGTH];
				this.engineState = array;
			}
			byte[] array2 = this.engineState;
			if (num < "{il2cpp array field local5->}")
			{
				int length = this.engineState.Length;
				byte b = (byte)((int)b + num);
				byte b2;
				b += b2;
				byte[] array3 = this.engineState;
				num++;
			}
		}

		// Token: 0x0600BBF5 RID: 48117 RVA: 0x0029797C File Offset: 0x00295B7C
		[Token(Token = "0x600BBF5")]
		[Address(RVA = "0x412370", Offset = "0x411370", VA = "0x180412370")]
		public RC4Engine()
		{
		}

		// Token: 0x0400767E RID: 30334
		[Token(Token = "0x400767E")]
		private static readonly int STATE_LENGTH;

		// Token: 0x0400767F RID: 30335
		[FieldOffset(Offset = "0x10")]
		[Token(Token = "0x400767F")]
		private byte[] engineState;

		// Token: 0x04007680 RID: 30336
		[FieldOffset(Offset = "0x18")]
		[Token(Token = "0x4007680")]
		private int x;

		// Token: 0x04007681 RID: 30337
		[FieldOffset(Offset = "0x1C")]
		[Token(Token = "0x4007681")]
		private int y;

		// Token: 0x04007682 RID: 30338
		[FieldOffset(Offset = "0x20")]
		[Token(Token = "0x4007682")]
		private byte[] workingKey;
	}
}