using System;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Digests;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Math;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Math.EC;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Math.Field;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
using Cpp2IlInjected;

namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Agreement
{
	// Token: 0x02001D0D RID: 7437
	[Token(Token = "0x2001D0D")]
	public class SM2KeyExchange
	{
		// Token: 0x0600BC50 RID: 48208 RVA: 0x002ACD20 File Offset: 0x002AAF20
		[Token(Token = "0x600BC50")]
		[Address(RVA = "0x1B479A0", Offset = "0x1B467A0", VA = "0x181B479A0")]
		public SM2KeyExchange()
		{
			SM3Digest sm3Digest = new SM3Digest();
			base..ctor();
			this.mDigest = sm3Digest;
		}

		// Token: 0x0600BC51 RID: 48209 RVA: 0x002ACD40 File Offset: 0x002AAF40
		[Token(Token = "0x600BC51")]
		[Address(RVA = "0x3FFB80", Offset = "0x3FE980", VA = "0x1803FFB80")]
		public SM2KeyExchange(IDigest digest)
		{
			this.mDigest = digest;
		}

		// Token: 0x0600BC52 RID: 48210 RVA: 0x002ACD5C File Offset: 0x002AAF5C
		[Token(Token = "0x600BC52")]
		[Address(RVA = "0x1B46FD0", Offset = "0x1B45DD0", VA = "0x181B46FD0", Slot = "4")]
		public virtual void Init(ICipherParameters privParam)
		{
			while (privParam != 0)
			{
				if ((privParam != 0 || privParam != 0) && privParam != 0 && privParam != 0)
				{
					if (privParam == 0)
					{
					}
					if (privParam != 0 && privParam != 0 && privParam != 0)
					{
						break;
					}
				}
			}
			int num = 0;
			byte[] array = new byte[0];
			this.mUserID = array;
			string text = num.ToString();
			this.mInitiator = text != null;
			int num2;
			this.mStaticKey = num2;
			TypeCode typeCode = num.GetTypeCode();
			this.mEphemeralKey = typeCode;
			ECDomainParameters parameters = this.mStaticKey.parameters;
			this.mECParams = parameters;
			string text2;
			this.mStaticPubPoint = text2;
			ECDomainParameters ecdomainParameters = this.mECParams;
			bool flag;
			this.mEphemeralPubPoint = flag;
			string text3 = ecdomainParameters.curve.ToString();
			this.mW = text3;
		}

		// Token: 0x0600BC53 RID: 48211 RVA: 0x002ACE24 File Offset: 0x002AB024
		[Token(Token = "0x600BC53")]
		[Address(RVA = "0x1B46810", Offset = "0x1B45610", VA = "0x181B46810", Slot = "5")]
		public virtual byte[] CalculateKey(int kLen, ICipherParameters pubParam)
		{
			while (pubParam != 0)
			{
				if ((pubParam != 0 || pubParam != 0) && pubParam != 0 && pubParam != 0)
				{
					if (pubParam == 0)
					{
					}
					if (pubParam != 0 && pubParam != 0 && pubParam != 0)
					{
						break;
					}
				}
			}
			int num = 0;
			byte[] array = new byte[0];
			ECPoint ecpoint = this.mStaticPubPoint;
			byte[] array2 = this.mUserID;
			IDigest digest = this.mDigest;
			byte[] z = this.GetZ(digest, array2, ecpoint);
			IDigest digest2 = this.mDigest;
			string text = num.ToString();
			byte[] z2 = this.GetZ(digest2, array, ecpoint);
			if (!this.mInitiator)
			{
			}
			throw new NullReferenceException();
		}

		// Token: 0x0600BC54 RID: 48212 RVA: 0x002ACEC4 File Offset: 0x002AB0C4
		[Token(Token = "0x600BC54")]
		[Address(RVA = "0x1B46150", Offset = "0x1B44F50", VA = "0x181B46150", Slot = "6")]
		public virtual byte[][] CalculateKeyWithConfirmation(int kLen, byte[] confirmationTag, ICipherParameters pubParam)
		{
			/*
An exception occurred when decompiling this method (0600BC54)

ICSharpCode.Decompiler.DecompilerException: Error decompiling System.Byte[][] BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Agreement.SM2KeyExchange::CalculateKeyWithConfirmation(System.Int32,System.Byte[],BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.ICipherParameters)

 ---> System.Exception: Basic block has to end with unconditional control flow. 
{
	IL_139:
	stloc:ArgumentException(var_32_143, newobj:ArgumentException(ArgumentException::.ctor, ldstr:string("if initiating, confirmationTag must be set")))
}

   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 1660
*/;
		}

		// Token: 0x0600BC55 RID: 48213 RVA: 0x002AD018 File Offset: 0x002AB218
		[Token(Token = "0x600BC55")]
		[Address(RVA = "0x1B46B10", Offset = "0x1B45910", VA = "0x181B46B10", Slot = "7")]
		protected virtual ECPoint CalculateU(SM2KeyExchangePublicParameters otherPub)
		{
			ECDomainParameters parameters = this.mStaticKey.parameters;
			ECCurve curve = parameters.curve;
			string text = otherPub.ToString();
			ECCurve curve2 = parameters.curve;
			ECPoint q = otherPub.StaticPublicKey.q;
			ECPoint ecpoint = ECAlgorithms.CleanPoint(curve2, q);
			string text2 = this.mEphemeralPubPoint.CurveCoordinateSystem.ToString();
			string text3 = ecpoint.CurveCoordinateSystem.ToString();
			ECPrivateKeyParameters ecprivateKeyParameters = this.mStaticKey;
			ECPrivateKeyParameters ecprivateKeyParameters2 = this.mEphemeralKey;
			BigInteger d = ecprivateKeyParameters.d;
			BigInteger d2 = ecprivateKeyParameters2.d;
			BigInteger bigInteger2;
			BigInteger bigInteger = bigInteger2.Multiply(d2);
			BigInteger bigInteger3 = d.Add(bigInteger);
			BigInteger bigInteger4 = this.mECParams.h.Multiply(bigInteger3);
			BigInteger n = this.mECParams.n;
			BigInteger bigInteger5 = bigInteger4.Mod(n);
			BigInteger bigInteger7;
			BigInteger bigInteger6 = bigInteger5.Multiply(bigInteger7);
			BigInteger n2 = this.mECParams.n;
			BigInteger bigInteger8 = bigInteger6.Mod(n2);
			ECPoint ecpoint2;
			bool flag = ECAlgorithms.SumOfTwoMultiplies(ecpoint2, bigInteger5, ecpoint, bigInteger8).SatisfiesCurveEquation();
			throw new NullReferenceException();
		}

		// Token: 0x0600BC56 RID: 48214 RVA: 0x002AD120 File Offset: 0x002AB320
		[Token(Token = "0x600BC56")]
		[Address(RVA = "0x1B472E0", Offset = "0x1B460E0", VA = "0x181B472E0", Slot = "8")]
		protected virtual byte[] Kdf(ECPoint u, byte[] za, byte[] zb, int klen)
		{
			IDigest digest = this.mDigest;
			int num;
			byte[] array = new byte[num];
			byte[] array2 = new byte[num];
			int num2 = 0;
			if (array2 != 0)
			{
				int curveCoordinateSystem = u.CurveCoordinateSystem;
				IDigest digest2 = this.mDigest;
				ECFieldElement affineXCoord = u.AffineXCoord;
				this.AddFieldElement(digest2, affineXCoord);
				IDigest digest3 = this.mDigest;
				int length = za.Length;
				IDigest digest4 = this.mDigest;
				int length2 = zb.Length;
			}
			if (num2 < array2.Length)
			{
				if (array2 == 0)
				{
					int curveCoordinateSystem2 = u.CurveCoordinateSystem;
					IDigest digest5 = this.mDigest;
					ECFieldElement affineXCoord2 = u.AffineXCoord;
					this.AddFieldElement(digest5, affineXCoord2);
					IDigest digest6 = this.mDigest;
					int length3 = za.Length;
					IDigest digest7 = this.mDigest;
					int length4 = zb.Length;
				}
				num2++;
				int num3 = 0;
				Pack.UInt32_To_BE((uint)num2, array, num3);
				IDigest digest8 = this.mDigest;
				IDigest digest9 = this.mDigest;
				int num4 = array2.Length;
				num4 -= num2;
				int num5 = 0;
				int num6;
				Array.Copy(array, num5, array2, num2, num6);
				num2 += num6;
			}
			return array2;
		}

		// Token: 0x0600BC57 RID: 48215 RVA: 0x002AD234 File Offset: 0x002AB434
		[Token(Token = "0x600BC57")]
		[Address(RVA = "0x1B476D0", Offset = "0x1B464D0", VA = "0x181B476D0")]
		private BigInteger Reduce(BigInteger x)
		{
			BigInteger one = BigInteger.One;
			int num = this.mW;
			BigInteger bigInteger = one.ShiftLeft(num);
			BigInteger one2 = BigInteger.One;
			BigInteger bigInteger2 = bigInteger.Subtract(one2);
			BigInteger bigInteger3 = x.And(bigInteger2);
			int num2 = this.mW;
			return bigInteger3.SetBit(num2);
		}

		// Token: 0x0600BC58 RID: 48216 RVA: 0x002AD288 File Offset: 0x002AB488
		[Token(Token = "0x600BC58")]
		[Address(RVA = "0x1B477A0", Offset = "0x1B465A0", VA = "0x181B477A0")]
		private byte[] S1(IDigest digest, ECPoint u, byte[] inner)
		{
			ECFieldElement affineXCoord = u.AffineXCoord;
			this.AddFieldElement(digest, affineXCoord);
			int length = inner.Length;
			return DigestUtilities.DoFinal(digest);
		}

		// Token: 0x0600BC59 RID: 48217 RVA: 0x002AD2B8 File Offset: 0x002AB4B8
		[Token(Token = "0x600BC59")]
		[Address(RVA = "0x1B45F90", Offset = "0x1B44D90", VA = "0x181B45F90")]
		private byte[] CalculateInnerHash(IDigest digest, ECPoint u, byte[] za, byte[] zb, ECPoint p1, ECPoint p2)
		{
			int curveCoordinateSystem = u.CurveCoordinateSystem;
			int length = za.Length;
			return DigestUtilities.DoFinal(digest);
		}

		// Token: 0x0600BC5A RID: 48218 RVA: 0x002AD2E4 File Offset: 0x002AB4E4
		[Token(Token = "0x600BC5A")]
		[Address(RVA = "0x1B478A0", Offset = "0x1B466A0", VA = "0x181B478A0")]
		private byte[] S2(IDigest digest, ECPoint u, byte[] inner)
		{
			ECFieldElement affineXCoord = u.AffineXCoord;
			this.AddFieldElement(digest, affineXCoord);
			int length = inner.Length;
			return DigestUtilities.DoFinal(digest);
		}

		// Token: 0x0600BC5B RID: 48219 RVA: 0x002AD314 File Offset: 0x002AB514
		[Token(Token = "0x600BC5B")]
		[Address(RVA = "0x1B46D70", Offset = "0x1B45B70", VA = "0x181B46D70")]
		private byte[] GetZ(IDigest digest, byte[] userID, ECPoint pubPoint)
		{
			int length = userID.Length;
			IFiniteField field = this.mECParams.curve.Field;
			ECFieldElement a = this.mECParams.curve.A;
			this.AddFieldElement(digest, a);
			int curveCoordinateSystem = this.mECParams.g.CurveCoordinateSystem;
			ECFieldElement affineXCoord = this.mECParams.g.AffineXCoord;
			this.AddFieldElement(digest, affineXCoord);
			int curveCoordinateSystem2 = pubPoint.CurveCoordinateSystem;
			ECFieldElement affineXCoord2 = pubPoint.AffineXCoord;
			this.AddFieldElement(digest, affineXCoord2);
			return DigestUtilities.DoFinal(digest);
		}

		// Token: 0x0600BC5C RID: 48220 RVA: 0x002AD3A4 File Offset: 0x002AB5A4
		[Token(Token = "0x600BC5C")]
		[Address(RVA = "0x1B45EE0", Offset = "0x1B44CE0", VA = "0x181B45EE0")]
		private void AddUserID(IDigest digest, byte[] userID)
		{
			int length = userID.Length;
		}

		// Token: 0x0600BC5D RID: 48221 RVA: 0x002AD3C0 File Offset: 0x002AB5C0
		[Token(Token = "0x600BC5D")]
		[Address(RVA = "0x1B45E50", Offset = "0x1B44C50", VA = "0x181B45E50")]
		private void AddFieldElement(IDigest digest, ECFieldElement v)
		{
		}

		// Token: 0x040077CB RID: 30667
		[FieldOffset(Offset = "0x10")]
		[Token(Token = "0x40077CB")]
		private readonly IDigest mDigest;

		// Token: 0x040077CC RID: 30668
		[FieldOffset(Offset = "0x18")]
		[Token(Token = "0x40077CC")]
		private byte[] mUserID;

		// Token: 0x040077CD RID: 30669
		[FieldOffset(Offset = "0x20")]
		[Token(Token = "0x40077CD")]
		private ECPrivateKeyParameters mStaticKey;

		// Token: 0x040077CE RID: 30670
		[FieldOffset(Offset = "0x28")]
		[Token(Token = "0x40077CE")]
		private ECPoint mStaticPubPoint;

		// Token: 0x040077CF RID: 30671
		[FieldOffset(Offset = "0x30")]
		[Token(Token = "0x40077CF")]
		private ECPoint mEphemeralPubPoint;

		// Token: 0x040077D0 RID: 30672
		[FieldOffset(Offset = "0x38")]
		[Token(Token = "0x40077D0")]
		private ECDomainParameters mECParams;

		// Token: 0x040077D1 RID: 30673
		[FieldOffset(Offset = "0x40")]
		[Token(Token = "0x40077D1")]
		private int mW;

		// Token: 0x040077D2 RID: 30674
		[FieldOffset(Offset = "0x48")]
		[Token(Token = "0x40077D2")]
		private ECPrivateKeyParameters mEphemeralKey;

		// Token: 0x040077D3 RID: 30675
		[FieldOffset(Offset = "0x50")]
		[Token(Token = "0x40077D3")]
		private bool mInitiator;
	}
}