Aug2021-Cpp2IL-Dump/Assembly-CSharp/BestHTTP/SecureProtocol/Org/BouncyCastle/Crypto/Tls/Chacha20Poly1305.cs

using System;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Macs;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
using Cpp2IlInjected;
using Hjg.Pngcs;

namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Tls
{
	// Token: 0x02001B0A RID: 6922
	[Token(Token = "0x2001B0A")]
	public class Chacha20Poly1305 : TlsCipher
	{
		// Token: 0x0600AC2B RID: 44075 RVA: 0x002577E4 File Offset: 0x002559E4
		[Token(Token = "0x600AC2B")]
		[Address(RVA = "0x18AB980", Offset = "0x18AA780", VA = "0x1818AB980")]
		public Chacha20Poly1305(TlsContext context)
		{
			do
			{
				base..ctor();
			}
			while (!TlsUtilities.IsTlsV12(context));
			this.context = context;
			byte[] array = TlsUtilities.CalculateKeyBlock(context, 88);
			int num;
			KeyParameter keyParameter = new KeyParameter(array, num, 32);
			num = 0;
			KeyParameter keyParameter2 = new KeyParameter(array, 32, 32);
			byte[] array2 = Arrays.CopyOfRange(array, 64, 76);
			byte[] array3 = Arrays.CopyOfRange(array, 76, 88);
			ChaCha7539Engine chaCha7539Engine = new ChaCha7539Engine();
			this.encryptCipher = chaCha7539Engine;
			ChaCha7539Engine chaCha7539Engine2 = new ChaCha7539Engine();
			this.decryptCipher = chaCha7539Engine2;
			if (chaCha7539Engine2 == 0)
			{
			}
			this.encryptIV = array3;
			this.decryptIV = array2;
			ChaCha7539Engine chaCha7539Engine3 = this.encryptCipher;
			byte[] array4 = this.encryptIV;
			ParametersWithIV parametersWithIV = new ParametersWithIV(keyParameter2, array4);
			chaCha7539Engine3.Reset();
			ChaCha7539Engine chaCha7539Engine4 = this.decryptCipher;
			byte[] array5 = this.decryptIV;
			ParametersWithIV parametersWithIV2 = new ParametersWithIV(keyParameter, array5);
			string algorithmName = ((IStreamCipher)chaCha7539Engine4).AlgorithmName;
		}

		// Token: 0x0600AC2C RID: 44076 RVA: 0x0000220F File Offset: 0x0000040F
		[Token(Token = "0x600AC2C")]
		[Address(RVA = "0x18AB670", Offset = "0x18AA470", VA = "0x1818AB670", Slot = "7")]
		public virtual int GetPlaintextLimit(int ciphertextLimit)
		{
			throw new AnalysisFailedException("CPP2IL failed to recover any usable IL for this method.");
		}

		// Token: 0x0600AC2D RID: 44077 RVA: 0x002578BC File Offset: 0x00255ABC
		[Token(Token = "0x600AC2D")]
		[Address(RVA = "0x18AB2A0", Offset = "0x18AA0A0", VA = "0x1818AB2A0", Slot = "8")]
		public virtual byte[] EncodePlaintext(long seqNo, byte type, byte[] plaintext, int offset, int len)
		{
			byte[] array = this.encryptIV;
			byte[] array2 = new byte[this.encryptCipher];
			this.encryptCipher.AdvanceCounter();
			return array2;
		}

		// Token: 0x0600AC2E RID: 44078 RVA: 0x002578F0 File Offset: 0x00255AF0
		[Token(Token = "0x600AC2E")]
		[Address(RVA = "0x18AB090", Offset = "0x18A9E90", VA = "0x1818AB090", Slot = "9")]
		public virtual byte[] DecodeCiphertext(long seqNo, byte type, byte[] ciphertext, int offset, int len)
		{
			bool flag;
			do
			{
				byte[] array = this.decryptIV;
			}
			while (!flag);
			byte[] array3;
			byte[] array2 = new byte[array3];
			this.decryptCipher.AdvanceCounter();
			return array2;
		}

		// Token: 0x0600AC2F RID: 44079 RVA: 0x00257920 File Offset: 0x00255B20
		[Token(Token = "0x600AC2F")]
		[Address(RVA = "0x18AB680", Offset = "0x18AA480", VA = "0x1818AB680", Slot = "10")]
		protected virtual KeyParameter InitRecord(IStreamCipher cipher, bool forEncryption, long seqNo, byte[] iv)
		{
			int num = 0;
			KeyParameter keyParameter;
			if (num < keyParameter)
			{
				num += num;
				num++;
			}
			throw new NullReferenceException();
		}

		// Token: 0x0600AC30 RID: 44080 RVA: 0x00257940 File Offset: 0x00255B40
		[Token(Token = "0x600AC30")]
		[Address(RVA = "0x18AAE60", Offset = "0x18A9C60", VA = "0x1818AAE60", Slot = "11")]
		protected virtual byte[] CalculateNonce(long seqNo, byte[] iv)
		{
			byte[] array = new byte[12];
			TlsUtilities.WriteUint64(seqNo, array, 4);
			int num = 0;
			num++;
			return array;
		}

		// Token: 0x0600AC31 RID: 44081 RVA: 0x0025796C File Offset: 0x00255B6C
		[Token(Token = "0x600AC31")]
		[Address(RVA = "0x18AB410", Offset = "0x18AA210", VA = "0x1818AB410", Slot = "12")]
		protected virtual KeyParameter GenerateRecordMacKey(IStreamCipher cipher)
		{
			byte[] array = new byte[64];
			int num = 0;
			num += num;
			num++;
			int num2;
			uint num3;
			KeyParameter keyParameter = new KeyParameter(array, num2, (int)num3);
			num2 = 0;
			int num4 = 0;
			Arrays.Fill(array, (byte)num4);
			return keyParameter;
		}

		// Token: 0x0600AC32 RID: 44082 RVA: 0x002579B4 File Offset: 0x00255BB4
		[Token(Token = "0x600AC32")]
		[Address(RVA = "0x18AAF40", Offset = "0x18A9D40", VA = "0x1818AAF40", Slot = "13")]
		protected virtual byte[] CalculateRecordMac(KeyParameter macKey, byte[] additionalData, byte[] buf, int off, int len)
		{
			Poly1305 poly = new Poly1305();
			int length = additionalData.Length;
			return MacUtilities.DoFinal(poly);
		}

		// Token: 0x0600AC33 RID: 44083 RVA: 0x002579DC File Offset: 0x00255BDC
		[Token(Token = "0x600AC33")]
		[Address(RVA = "0x18AB7C0", Offset = "0x18AA5C0", VA = "0x1818AB7C0", Slot = "14")]
		protected virtual void UpdateRecordMacLength(IMac mac, int len)
		{
			int length = Pack.UInt64_To_LE((ulong)len).Length;
		}

		// Token: 0x0600AC34 RID: 44084 RVA: 0x002579FC File Offset: 0x00255BFC
		[Token(Token = "0x600AC34")]
		[Address(RVA = "0x18AB840", Offset = "0x18AA640", VA = "0x1818AB840", Slot = "15")]
		protected virtual void UpdateRecordMacText(IMac mac, byte[] buf, int off, int len)
		{
			if (mac < 0)
			{
			}
		}

		// Token: 0x0600AC35 RID: 44085 RVA: 0x00257A14 File Offset: 0x00255C14
		[Token(Token = "0x600AC35")]
		[Address(RVA = "0x18AB570", Offset = "0x18AA370", VA = "0x1818AB570", Slot = "16")]
		protected virtual byte[] GetAdditionalData(long seqNo, byte type, int len)
		{
			byte[] array = new byte[13];
			int num = 0;
			TlsUtilities.WriteUint64(seqNo, array, num);
			TlsUtilities.WriteUint8(type, array, 8);
			TlsContext tlsContext = this.context;
			PngHelperInternal.WriteInt2tobytes(len, array, 11);
			return array;
		}

		// Token: 0x04006D17 RID: 27927
		[Token(Token = "0x4006D17")]
		private static readonly byte[] Zeroes = new byte[15];

		// Token: 0x04006D18 RID: 27928
		[FieldOffset(Offset = "0x10")]
		[Token(Token = "0x4006D18")]
		protected readonly TlsContext context;

		// Token: 0x04006D19 RID: 27929
		[FieldOffset(Offset = "0x18")]
		[Token(Token = "0x4006D19")]
		protected readonly ChaCha7539Engine encryptCipher;

		// Token: 0x04006D1A RID: 27930
		[FieldOffset(Offset = "0x20")]
		[Token(Token = "0x4006D1A")]
		protected readonly ChaCha7539Engine decryptCipher;

		// Token: 0x04006D1B RID: 27931
		[FieldOffset(Offset = "0x28")]
		[Token(Token = "0x4006D1B")]
		protected readonly byte[] encryptIV;

		// Token: 0x04006D1C RID: 27932
		[FieldOffset(Offset = "0x30")]
		[Token(Token = "0x4006D1C")]
		protected readonly byte[] decryptIV;
	}
}