using System;
using System.Runtime.InteropServices;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Math;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
using Cpp2IlInjected;

namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Signers
{
	// Token: 0x020015D2 RID: 5586
	[Token(Token = "0x20015D2")]
	[StructLayout(3)]
	public class Gost3410Signer : IDsaExt, IDsa
	{
		// Token: 0x170017E3 RID: 6115
		// (get) Token: 0x0600954A RID: 38218 RVA: 0x00210750 File Offset: 0x0020E950
		[Token(Token = "0x170017E3")]
		public virtual string AlgorithmName
		{
			[Token(Token = "0x600954A")]
			[Address(RVA = "0x1E40D70", Offset = "0x1E3F770", VA = "0x181E40D70", Slot = "9")]
			get
			{
				return "GOST3410";
			}
		}

		// Token: 0x0600954B RID: 38219 RVA: 0x00210764 File Offset: 0x0020E964
		[Token(Token = "0x600954B")]
		[Address(RVA = "0x1E40750", Offset = "0x1E3F150", VA = "0x181E40750", Slot = "10")]
		public virtual void Init(bool forSigning, ICipherParameters parameters)
		{
			/*
An exception occurred when decompiling this method (0600954B)

ICSharpCode.Decompiler.DecompilerException: Error decompiling System.Void BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Signers.Gost3410Signer::Init(System.Boolean,BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.ICipherParameters)

 ---> System.Exception: Basic block has to end with unconditional control flow. 
{
	IL_60:
	stloc:InvalidKeyException(var_8_6A, newobj:InvalidKeyException(InvalidKeyException::.ctor, ldstr:string("GOST3410 public key required for signing")))
}

   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: 0x170017E4 RID: 6116
		// (get) Token: 0x0600954C RID: 38220 RVA: 0x002107DC File Offset: 0x0020E9DC
		[Token(Token = "0x170017E4")]
		public virtual BigInteger Order
		{
			[Token(Token = "0x600954C")]
			[Address(RVA = "0x1C69900", Offset = "0x1C68300", VA = "0x181C69900", Slot = "11")]
			get
			{
				return this.key.parameters.q;
			}
		}

		// Token: 0x0600954D RID: 38221 RVA: 0x00210800 File Offset: 0x0020EA00
		[Token(Token = "0x600954D")]
		[Address(RVA = "0x1E403F0", Offset = "0x1E3EDF0", VA = "0x181E403F0", Slot = "12")]
		public virtual BigInteger[] GenerateSignature(byte[] message)
		{
			Gost3410Parameters parameters;
			BigInteger bigInteger2;
			BigInteger bigInteger4;
			BigInteger bigInteger5;
			Gost3410KeyParameters gost3410KeyParameters;
			do
			{
				byte[] array = new byte[message.Length];
				int num = 0;
				int num2 = array.Length;
				if (num != num2)
				{
					num2 -= num;
					num++;
				}
				BigInteger bigInteger = new BigInteger(1, array);
				parameters = this.key.parameters;
				int bitLength = parameters.q.BitLength;
				SecureRandom secureRandom = this.random;
				bigInteger2 = new BigInteger(bitLength, secureRandom);
				BigInteger q = parameters.q;
				int num3 = bigInteger2.CompareTo(q);
				BigInteger a = parameters.a;
				BigInteger p = parameters.p;
				BigInteger bigInteger3 = a.ModPow(bigInteger2, p);
				BigInteger q2 = parameters.q;
				bigInteger4 = bigInteger3.Mod(q2);
				bigInteger5 = bigInteger2.Multiply(bigInteger);
				gost3410KeyParameters = this.key;
			}
			while (gost3410KeyParameters == 0 || gost3410KeyParameters == 0);
			BigInteger bigInteger6 = bigInteger2.Multiply(bigInteger4);
			BigInteger bigInteger7 = bigInteger5.Add(bigInteger6);
			BigInteger q3 = parameters.q;
			BigInteger bigInteger8 = bigInteger7.Mod(q3);
			BigInteger[] array2 = new BigInteger[2];
			if (bigInteger4 != 0)
			{
			}
			array2[0] = bigInteger4;
			if (bigInteger8 != 0)
			{
			}
			array2[1] = bigInteger8;
			return array2;
		}

		// Token: 0x0600954E RID: 38222 RVA: 0x00210930 File Offset: 0x0020EB30
		[Token(Token = "0x600954E")]
		[Address(RVA = "0x1E409E0", Offset = "0x1E3F3E0", VA = "0x181E409E0", Slot = "13")]
		public virtual bool VerifySignature(byte[] message, BigInteger r, BigInteger s)
		{
			Gost3410Parameters parameters;
			BigInteger bigInteger8;
			Gost3410KeyParameters gost3410KeyParameters;
			do
			{
				byte[] array = new byte[message.Length];
				int num = 0;
				int num2 = array.Length;
				if (num != num2)
				{
					num2 -= num;
					num++;
				}
				BigInteger bigInteger = new BigInteger(1, array);
				parameters = this.key.parameters;
				if (parameters.q.CompareTo(r) <= 0 || parameters.q.CompareTo(s) <= 0)
				{
					goto IL_14F;
				}
				BigInteger q = parameters.q;
				BigInteger two = BigInteger.Two;
				BigInteger bigInteger2 = q.Subtract(two);
				BigInteger q2 = parameters.q;
				BigInteger bigInteger3 = bigInteger.ModPow(bigInteger2, q2);
				BigInteger bigInteger4 = s.Multiply(bigInteger3);
				BigInteger q3 = parameters.q;
				BigInteger bigInteger5 = bigInteger4.Mod(q3);
				BigInteger bigInteger6 = parameters.q.Subtract(r).Multiply(bigInteger3);
				BigInteger q4 = parameters.q;
				BigInteger bigInteger7 = bigInteger6.Mod(q4);
				BigInteger a = parameters.a;
				BigInteger p = parameters.p;
				bigInteger8 = a.ModPow(bigInteger5, p);
				gost3410KeyParameters = this.key;
			}
			while (gost3410KeyParameters == 0 || gost3410KeyParameters == 0);
			BigInteger p2 = parameters.p;
			BigInteger bigInteger10;
			BigInteger bigInteger9 = bigInteger8.Multiply(bigInteger10);
			BigInteger p3 = parameters.p;
			BigInteger bigInteger11 = bigInteger9.Mod(p3);
			BigInteger q5 = parameters.q;
			BigInteger bigInteger12 = bigInteger11.Mod(q5);
			IL_14F:
			throw new NullReferenceException();
		}

		// Token: 0x0600954F RID: 38223 RVA: 0x00210A94 File Offset: 0x0020EC94
		[Token(Token = "0x600954F")]
		[Address(RVA = "0x3C1670", Offset = "0x3C0070", VA = "0x1803C1670")]
		public Gost3410Signer()
		{
		}

		// Token: 0x04006280 RID: 25216
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x10")]
		[Token(Token = "0x4006280")]
		private Gost3410KeyParameters key;

		// Token: 0x04006281 RID: 25217
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x18")]
		[Token(Token = "0x4006281")]
		private SecureRandom random;
	}
}