27Aug2021-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: 0x02001BEA RID: 7146
	[Token(Token = "0x2001BEA")]
	public class Chacha20Poly1305 : TlsCipher
	{
		// Token: 0x0600AFF9 RID: 45049 RVA: 0x00260888 File Offset: 0x0025EA88
		[Token(Token = "0x600AFF9")]
		[Address(RVA = "0x2332570", Offset = "0x2331570", VA = "0x182332570")]
		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: 0x0600AFFA RID: 45050 RVA: 0x0000220F File Offset: 0x0000040F
		[Token(Token = "0x600AFFA")]
		[Address(RVA = "0x23322C0", Offset = "0x23312C0", VA = "0x1823322C0", Slot = "7")]
		public virtual int GetPlaintextLimit(int ciphertextLimit)
		{
			throw new AnalysisFailedException("CPP2IL failed to recover any usable IL for this method.");
		}

		// Token: 0x0600AFFB RID: 45051 RVA: 0x00260960 File Offset: 0x0025EB60
		[Token(Token = "0x600AFFB")]
		[Address(RVA = "0x2331EF0", Offset = "0x2330EF0", VA = "0x182331EF0", 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: 0x0600AFFC RID: 45052 RVA: 0x00260994 File Offset: 0x0025EB94
		[Token(Token = "0x600AFFC")]
		[Address(RVA = "0x2331CE0", Offset = "0x2330CE0", VA = "0x182331CE0", 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: 0x0600AFFD RID: 45053 RVA: 0x002609C4 File Offset: 0x0025EBC4
		[Token(Token = "0x600AFFD")]
		[Address(RVA = "0x23322D0", Offset = "0x23312D0", VA = "0x1823322D0", Slot = "10")]
		protected virtual KeyParameter InitRecord(IStreamCipher cipher, bool forEncryption, long seqNo, byte[] iv)
		{
			throw new NullReferenceException();
		}

		// Token: 0x0600AFFE RID: 45054 RVA: 0x002609D8 File Offset: 0x0025EBD8
		[Token(Token = "0x600AFFE")]
		[Address(RVA = "0x2331AB0", Offset = "0x2330AB0", VA = "0x182331AB0", 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: 0x0600AFFF RID: 45055 RVA: 0x00260A04 File Offset: 0x0025EC04
		[Token(Token = "0x600AFFF")]
		[Address(RVA = "0x2332060", Offset = "0x2331060", VA = "0x182332060", 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: 0x0600B000 RID: 45056 RVA: 0x00260A4C File Offset: 0x0025EC4C
		[Token(Token = "0x600B000")]
		[Address(RVA = "0x2331B90", Offset = "0x2330B90", VA = "0x182331B90", 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: 0x0600B001 RID: 45057 RVA: 0x00260A74 File Offset: 0x0025EC74
		[Token(Token = "0x600B001")]
		[Address(RVA = "0x23323B0", Offset = "0x23313B0", VA = "0x1823323B0", Slot = "14")]
		protected virtual void UpdateRecordMacLength(IMac mac, int len)
		{
			int length = Pack.UInt64_To_LE((ulong)len).Length;
		}

		// Token: 0x0600B002 RID: 45058 RVA: 0x00260A94 File Offset: 0x0025EC94
		[Token(Token = "0x600B002")]
		[Address(RVA = "0x2332430", Offset = "0x2331430", VA = "0x182332430", Slot = "15")]
		protected virtual void UpdateRecordMacText(IMac mac, byte[] buf, int off, int len)
		{
			if (mac < 0)
			{
			}
		}

		// Token: 0x0600B003 RID: 45059 RVA: 0x00260AAC File Offset: 0x0025ECAC
		[Token(Token = "0x600B003")]
		[Address(RVA = "0x23321C0", Offset = "0x23311C0", VA = "0x1823321C0", 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: 0x04006ED0 RID: 28368
		[Token(Token = "0x4006ED0")]
		private static readonly byte[] Zeroes = new byte[15];

		// Token: 0x04006ED1 RID: 28369
		[FieldOffset(Offset = "0x10")]
		[Token(Token = "0x4006ED1")]
		protected readonly TlsContext context;

		// Token: 0x04006ED2 RID: 28370
		[FieldOffset(Offset = "0x18")]
		[Token(Token = "0x4006ED2")]
		protected readonly ChaCha7539Engine encryptCipher;

		// Token: 0x04006ED3 RID: 28371
		[FieldOffset(Offset = "0x20")]
		[Token(Token = "0x4006ED3")]
		protected readonly ChaCha7539Engine decryptCipher;

		// Token: 0x04006ED4 RID: 28372
		[FieldOffset(Offset = "0x28")]
		[Token(Token = "0x4006ED4")]
		protected readonly byte[] encryptIV;

		// Token: 0x04006ED5 RID: 28373
		[FieldOffset(Offset = "0x30")]
		[Token(Token = "0x4006ED5")]
		protected readonly byte[] decryptIV;
	}
}