using System;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Encoders;
using Cpp2IlInjected;

namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Prng.Drbg
{
	// Token: 0x02001CB3 RID: 7347
	[Token(Token = "0x2001CB3")]
	public class CtrSP800Drbg : ISP80090Drbg
	{
		// Token: 0x0600B5DE RID: 46558 RVA: 0x002758C4 File Offset: 0x00273AC4
		[Token(Token = "0x600B5DE")]
		[Address(RVA = "0x2354090", Offset = "0x2353090", VA = "0x182354090")]
		public CtrSP800Drbg(IBlockCipher engine, int keySizeInBits, int securityStrength, IEntropySource entropySource, byte[] personalizationString, byte[] nonce)
		{
			if (!this.IsTdea(engine) || keySizeInBits == 168)
			{
			}
			this.mEntropySource = 0;
			this.mEngine = engine;
			this.mKeySizeInBits = keySizeInBits;
			this.mSecurityStrength = securityStrength;
			this.mSeedLength = (int)((uint)2);
			bool flag = this.IsTdea(engine);
			this.mIsTdea = flag;
			byte[] entropy = this.GetEntropy();
		}

		// Token: 0x0600B5DF RID: 46559 RVA: 0x00275930 File Offset: 0x00273B30
		[Token(Token = "0x600B5DF")]
		[Address(RVA = "0x2352E00", Offset = "0x2351E00", VA = "0x182352E00")]
		private void CTR_DRBG_Instantiate_algorithm(byte[] entropy, byte[] nonce, byte[] personalisationString)
		{
			byte[][] array = new byte[3][];
			if (entropy != 0)
			{
			}
			array[0] = entropy;
			if (nonce != 0)
			{
			}
			array[1] = nonce;
			if (personalisationString != 0)
			{
			}
			array[2] = personalisationString;
			byte[] array2 = Arrays.ConcatenateAll(array);
			int num = this.mSeedLength;
			byte[] array3 = this.Block_Cipher_df(array2, num);
			IBlockCipher blockCipher = this.mEngine;
			int num2 = this.mKeySizeInBits;
			num2 += 7;
			byte[] array4 = new byte[0];
			this.mKey = array4;
			byte[] array5 = new byte[array3];
			byte[] array6 = this.mKey;
			this.mV = array5;
			this.CTR_DRBG_Update(array3, array6, array5);
			this.mReseedCounter = (long)((ulong)1L);
		}

		// Token: 0x0600B5E0 RID: 46560 RVA: 0x002759DC File Offset: 0x00273BDC
		[Token(Token = "0x600B5E0")]
		[Address(RVA = "0x23530D0", Offset = "0x23520D0", VA = "0x1823530D0")]
		private void CTR_DRBG_Update(byte[] seed, byte[] key, byte[] v)
		{
			byte[] array = new byte[seed.Length];
			IBlockCipher blockCipher = this.mEngine;
			byte[] array2 = new byte[array];
			IBlockCipher blockCipher2 = this.mEngine;
			IBlockCipher blockCipher3 = this.mEngine;
			KeyParameter keyParameter = new KeyParameter(this.ExpandKey(key));
			int num = 0;
			int num6;
			if (num < seed.Length)
			{
				int num2 = v.Length;
				uint num3;
				num2 -= (int)num3;
				byte b;
				num3 += (uint)b;
				IBlockCipher blockCipher4 = this.mEngine;
				if (num < num2)
				{
					num += num;
					num++;
				}
				int num4 = array.Length;
				num4 -= num;
				int num5 = 0;
				num += array2;
				num6 = 0;
				num5 += num5;
				num += 4;
				num += 19;
			}
			int length = array.Length;
			if (num6 < length)
			{
				num6++;
			}
			int num7 = 0;
			int length2 = v.Length;
			int num8 = 0;
			Array.Copy(array, num7, v, num8, length2);
		}

		// Token: 0x0600B5E1 RID: 46561 RVA: 0x00275AC4 File Offset: 0x00273CC4
		[Token(Token = "0x600B5E1")]
		[Address(RVA = "0x2353020", Offset = "0x2352020", VA = "0x182353020")]
		private void CTR_DRBG_Reseed_algorithm(byte[] additionalInput)
		{
			byte[] array = Arrays.Concatenate(this.GetEntropy(), additionalInput);
			int num = this.mSeedLength;
			byte[] array2 = this.Block_Cipher_df(array, num);
			byte[] array3 = this.mV;
			byte[] array4 = this.mKey;
			this.CTR_DRBG_Update(array2, array4, array3);
			this.mReseedCounter = (long)((ulong)1L);
		}

		// Token: 0x0600B5E2 RID: 46562 RVA: 0x00275B10 File Offset: 0x00273D10
		[Token(Token = "0x600B5E2")]
		[Address(RVA = "0x2353F30", Offset = "0x2352F30", VA = "0x182353F30")]
		private void XOR(byte[] output, byte[] a, byte[] b, int bOff)
		{
			int num = 0;
			int length = output.Length;
			if (num < length)
			{
				num++;
			}
		}

		// Token: 0x0600B5E3 RID: 46563 RVA: 0x00275B34 File Offset: 0x00273D34
		[Token(Token = "0x600B5E3")]
		[Address(RVA = "0x23525D0", Offset = "0x23515D0", VA = "0x1823525D0")]
		private void AddOneTo(byte[] longer)
		{
			int num = longer.Length;
			uint num2;
			num -= (int)num2;
			byte b;
			num2 += (uint)b;
		}

		// Token: 0x0600B5E4 RID: 46564 RVA: 0x00275B58 File Offset: 0x00273D58
		[Token(Token = "0x600B5E4")]
		[Address(RVA = "0x2353950", Offset = "0x2352950", VA = "0x182353950")]
		private byte[] GetEntropy()
		{
			IEntropySource entropySource = this.mEntropySource;
			int num = this.mSecurityStrength;
			num += 7;
			num += typeof(IEntropySource).TypeHandle;
			throw new NullReferenceException();
		}

		// Token: 0x0600B5E5 RID: 46565 RVA: 0x00275B84 File Offset: 0x00273D84
		[Token(Token = "0x600B5E5")]
		[Address(RVA = "0x2352920", Offset = "0x2351920", VA = "0x182352920")]
		private byte[] Block_Cipher_df(byte[] inputString, int bitLength)
		{
			IBlockCipher blockCipher = this.mEngine;
			int length = inputString.Length;
			byte[] array = new byte[0];
			int num = 0;
			int num2 = 0;
			this.copyIntToByteArray(array, length, num2);
			this.copyIntToByteArray(array, length, 4);
			int num3 = 0;
			Array.Copy(inputString, num3, array, 8, length);
			int num4 = this.mKeySizeInBits;
			num3 += num4;
			byte[] array2 = new byte[num3];
			byte[] array3 = new byte[num3];
			byte[] array4 = new byte[num3];
			int num5 = this.mKeySizeInBits;
			num3 += num5;
			byte[] array5 = new byte[num3];
			int num6 = 0;
			int length2 = array5.Length;
			int num7 = 0;
			byte[] k_BITS = CtrSP800Drbg.K_BITS;
			Array.Copy(k_BITS, num7, array5, num6, length2);
			int num9;
			if (k_BITS > 0)
			{
				array4[0] = (byte)num;
				array4[0] = (byte)num;
				array4[0] = (byte)num;
				array4[0] = (byte)num;
				this.BCC(array3, array5, array4, array);
				int num8 = array2.Length;
				num8 -= num;
				num9 = 0;
				Array.Copy(array3, num9, array2, num, num8);
				int num10 = this.mKeySizeInBits;
				num += num9;
				num10 += num9;
				num++;
			}
			byte[] array6 = new byte[num9];
			int length3 = array5.Length;
			int num11 = 0;
			int num12 = 0;
			Array.Copy(array2, num12, array5, num11, length3);
			int length4 = array6.Length;
			int num13 = 0;
			int length5 = array5.Length;
			Array.Copy(array2, length5, array6, num13, length4);
			byte[] array7 = new byte[0];
			IBlockCipher blockCipher2 = this.mEngine;
			KeyParameter keyParameter = new KeyParameter(this.ExpandKey(array5));
			int num14 = 0;
			if (num14 < array7.Length)
			{
				IBlockCipher blockCipher3 = this.mEngine;
				if (num14 < blockCipher2)
				{
					num14 += num14;
					num14++;
				}
				int num15 = array7.Length;
				num15 -= num14;
				int num16 = 0;
				Array.Copy(array6, num16, array7, num14, num15);
				num16 += num16;
				num14 += 4;
				num14 += 19;
			}
			return array7;
		}

		// Token: 0x0600B5E6 RID: 46566 RVA: 0x00275D78 File Offset: 0x00273F78
		[Token(Token = "0x600B5E6")]
		[Address(RVA = "0x2352630", Offset = "0x2351630", VA = "0x182352630")]
		private void BCC(byte[] bccOut, byte[] k, byte[] iV, byte[] data)
		{
			IBlockCipher blockCipher = this.mEngine;
			byte[] array = new byte[0];
			byte[] array2 = new byte[0];
			IBlockCipher blockCipher2 = this.mEngine;
			KeyParameter keyParameter = new KeyParameter(this.ExpandKey(k));
			IBlockCipher blockCipher3 = this.mEngine;
			int num = 0;
			int length = array2.Length;
			if (num < length)
			{
				num++;
			}
			IBlockCipher blockCipher4 = this.mEngine;
			int num2 = 0;
			if (num2 < num)
			{
				num2 += num2;
				num2++;
			}
			num++;
		}

		// Token: 0x0600B5E7 RID: 46567 RVA: 0x00275E08 File Offset: 0x00274008
		[Token(Token = "0x600B5E7")]
		[Address(RVA = "0x23542C0", Offset = "0x23532C0", VA = "0x1823542C0")]
		private void copyIntToByteArray(byte[] buf, int value, int offSet)
		{
			int num = offSet + 1;
		}

		// Token: 0x17001C92 RID: 7314
		// (get) Token: 0x0600B5E8 RID: 46568 RVA: 0x00275E20 File Offset: 0x00274020
		[Token(Token = "0x17001C92")]
		public int BlockSize
		{
			[Token(Token = "0x600B5E8")]
			[Address(RVA = "0x2354360", Offset = "0x2353360", VA = "0x182354360", Slot = "4")]
			get
			{
				return this.mV.Length;
			}
		}

		// Token: 0x0600B5E9 RID: 46569 RVA: 0x00275E40 File Offset: 0x00274040
		[Token(Token = "0x600B5E9")]
		[Address(RVA = "0x23534B0", Offset = "0x23524B0", VA = "0x1823534B0", Slot = "5")]
		public int Generate(byte[] output, byte[] additionalInput, bool predictionResistant)
		{
			long num = this.mReseedCounter;
			if (!this.mIsTdea)
			{
				int num2 = CtrSP800Drbg.AES_MAX_BITS_REQUEST;
				if (output == 0)
				{
					goto IL_34;
				}
				num2 += typeof(DrbgUtilities).TypeHandle;
			}
			int num3 = CtrSP800Drbg.TDEA_MAX_BITS_REQUEST;
			if (output != 0)
			{
				num3 += typeof(DrbgUtilities).TypeHandle;
			}
			IL_34:
			int num4 = 0;
			if (predictionResistant)
			{
				this.CTR_DRBG_Reseed_algorithm(additionalInput);
			}
			int num5 = this.mSeedLength;
			if (num4 == 0)
			{
				byte[] array = new byte[num5];
			}
			byte[] array2 = this.mV;
			byte[] array3 = this.mKey;
			byte[] array4;
			this.CTR_DRBG_Update(array4, array3, array2);
			byte[] array5 = new byte[this.mV.Length];
			byte[] array6 = this.mKey;
			IBlockCipher blockCipher = this.mEngine;
			KeyParameter keyParameter = new KeyParameter(this.ExpandKey(array6));
			int num6 = output.Length;
			int num7 = array5.Length;
			int num8 = num7 * num4;
			num6 -= num8;
			int length = this.mV.Length;
			num7 = num6;
			int num9 = length * num4;
			num7 -= num9;
			if (num7 != 0)
			{
				byte[] array7 = this.mV;
				this.AddOneTo(array7);
				IBlockCipher blockCipher2 = this.mEngine;
				int num10 = array5.Length * num4;
				int num11 = 0;
				Array.Copy(array5, num11, output, num10, num7);
			}
			num4++;
			byte[] array8 = this.mV;
			byte[] array9 = this.mKey;
			this.CTR_DRBG_Update(array4, array9, array8);
			return output.Length;
		}

		// Token: 0x0600B5EA RID: 46570 RVA: 0x00275FA4 File Offset: 0x002741A4
		[Token(Token = "0x600B5EA")]
		[Address(RVA = "0x2353F20", Offset = "0x2352F20", VA = "0x182353F20", Slot = "6")]
		public void Reseed(byte[] additionalInput)
		{
			this.CTR_DRBG_Reseed_algorithm(additionalInput);
		}

		// Token: 0x0600B5EB RID: 46571 RVA: 0x00275FB8 File Offset: 0x002741B8
		[Token(Token = "0x600B5EB")]
		[Address(RVA = "0x2353AA0", Offset = "0x2352AA0", VA = "0x182353AA0")]
		private bool IsTdea(IBlockCipher cipher)
		{
			bool flag;
			bool flag2;
			return flag || flag2;
		}

		// Token: 0x0600B5EC RID: 46572 RVA: 0x00275FD4 File Offset: 0x002741D4
		[Token(Token = "0x600B5EC")]
		[Address(RVA = "0x23539F0", Offset = "0x23529F0", VA = "0x1823539F0")]
		private int GetMaxSecurityStrength(IBlockCipher cipher, int keySizeInBits)
		{
			if (!this.IsTdea(cipher) || keySizeInBits == 168)
			{
			}
			return -1;
		}

		// Token: 0x0600B5ED RID: 46573 RVA: 0x00275FFC File Offset: 0x002741FC
		[Token(Token = "0x600B5ED")]
		[Address(RVA = "0x23533E0", Offset = "0x23523E0", VA = "0x1823533E0")]
		private byte[] ExpandKey(byte[] key)
		{
			if (!this.mIsTdea)
			{
				return key;
			}
			byte[] array = new byte[24];
			int num = 0;
			int num2 = 0;
			this.PadKey(key, num2, array, num);
			ulong num3;
			this.PadKey(key, 7, array, (int)num3);
			ulong num4;
			this.PadKey(key, 14, array, (int)num4);
			return array;
		}

		// Token: 0x0600B5EE RID: 46574 RVA: 0x00276044 File Offset: 0x00274244
		[Token(Token = "0x600B5EE")]
		[Address(RVA = "0x2353B30", Offset = "0x2352B30", VA = "0x182353B30")]
		private void PadKey(byte[] keyMaster, int keyOff, byte[] tmp, int tmpOff)
		{
			int length = keyMaster.Length;
			int num = keyOff + 1;
			byte b;
			tmp[0] = b;
			int length2 = keyMaster.Length;
			byte b2;
			tmp[0] = b2;
			int length3 = keyMaster.Length;
			byte b3;
			tmp[0] = b3;
			int length4 = keyMaster.Length;
			byte b4;
			tmp[0] = b4;
			int length5 = keyMaster.Length;
			byte b5;
			tmp[0] = b5;
			int length6 = keyMaster.Length;
			byte b6;
			b6 += b6;
		}

		// Token: 0x0400732C RID: 29484
		[Token(Token = "0x400732C")]
		private static readonly long TDEA_RESEED_MAX = (long)((uint)int.MinValue);

		// Token: 0x0400732D RID: 29485
		[Token(Token = "0x400732D")]
		private static readonly long AES_RESEED_MAX = (long)((ulong)140737488355328L);

		// Token: 0x0400732E RID: 29486
		[Token(Token = "0x400732E")]
		private static readonly int TDEA_MAX_BITS_REQUEST;

		// Token: 0x0400732F RID: 29487
		[Token(Token = "0x400732F")]
		private static readonly int AES_MAX_BITS_REQUEST;

		// Token: 0x04007330 RID: 29488
		[FieldOffset(Offset = "0x10")]
		[Token(Token = "0x4007330")]
		private readonly IEntropySource mEntropySource;

		// Token: 0x04007331 RID: 29489
		[FieldOffset(Offset = "0x18")]
		[Token(Token = "0x4007331")]
		private readonly IBlockCipher mEngine;

		// Token: 0x04007332 RID: 29490
		[FieldOffset(Offset = "0x20")]
		[Token(Token = "0x4007332")]
		private readonly int mKeySizeInBits;

		// Token: 0x04007333 RID: 29491
		[FieldOffset(Offset = "0x24")]
		[Token(Token = "0x4007333")]
		private readonly int mSeedLength;

		// Token: 0x04007334 RID: 29492
		[FieldOffset(Offset = "0x28")]
		[Token(Token = "0x4007334")]
		private readonly int mSecurityStrength;

		// Token: 0x04007335 RID: 29493
		[FieldOffset(Offset = "0x30")]
		[Token(Token = "0x4007335")]
		private byte[] mKey;

		// Token: 0x04007336 RID: 29494
		[FieldOffset(Offset = "0x38")]
		[Token(Token = "0x4007336")]
		private byte[] mV;

		// Token: 0x04007337 RID: 29495
		[FieldOffset(Offset = "0x40")]
		[Token(Token = "0x4007337")]
		private long mReseedCounter;

		// Token: 0x04007338 RID: 29496
		[FieldOffset(Offset = "0x48")]
		[Token(Token = "0x4007338")]
		private bool mIsTdea;

		// Token: 0x04007339 RID: 29497
		[Token(Token = "0x4007339")]
		private static readonly byte[] K_BITS = Hex.Decode("000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F");
	}
}