#define TRACE
using System;
using System.Diagnostics;
using System.Numerics;
using System.Security.Cryptography;
using System.Text;
using ArchestrAServices.Common;

namespace ArchestrAServices.ASBContract;

public class SysAuthParameters
{
	public string ASBSolutionName;

	public bool ASBSolutionValid;

	public int DH_KeySize;

	public int DH_SecretSize;

	public BigInteger DH_p;

	public BigInteger DH_g;

	private string m_SysAuthPassphrase;

	private byte[] m_SysAuthCertificate;

	public uint ConnectionLifetime;

	public string SaltValue;

	public string hashAlgorithm;

	public int PasswordIterations;

	public string InitialVector;

	public int KeySize;

	private static string RegKeyRelativePath = string.Empty;

	public static int DH_KeySize_Dft = 1024;

	public static int DH_SecretSize_Dft = 160;

	public static string DH_passphrase_Dft = Environment.MachineName;

	public static uint ConnectionLifetime_Dft = 60000u;

	public static string SaltValue_Dft = "s@1tValue";

	public static string hashAlgorithm_Dft = CngAlgorithm.MD5.ToString();

	public static int PasswordIterations_Dft = 1;

	public static string InitialVector_Dft = "ba172e9941be138b";

	public static int KeySize_Dft = 256;

	private static string s_DECIMAL768 = "1552518092300708935130918131258481755631334049434514313202351194902966239949102107258669453876591642442910007680288864229150803718918046342632727613031282983744380820890196288509170691316593175367469551763119843371637221007210577919";

	private static byte[] s_OAKLEY768 = new byte[96]
	{
		255, 255, 255, 255, 255, 255, 255, 255, 201, 15,
		218, 162, 33, 104, 194, 52, 196, 198, 98, 139,
		128, 220, 28, 209, 41, 2, 78, 8, 138, 103,
		204, 116, 2, 11, 190, 166, 59, 19, 155, 34,
		81, 74, 8, 121, 142, 52, 4, 221, 239, 149,
		25, 179, 205, 58, 67, 27, 48, 43, 10, 109,
		242, 95, 20, 55, 79, 225, 53, 109, 109, 81,
		194, 69, 228, 133, 181, 118, 98, 94, 126, 198,
		244, 76, 66, 233, 166, 58, 54, 32, 255, 255,
		255, 255, 255, 255, 255, 255
	};

	private static string s_DECIMAL1024 = "179769313486231590770839156793787453197860296048756011706444423684197180216158519368947833795864925541502180565485980503646440548199239100050792877003355816639229553136239076508735759914822574862575007425302077447712589550957937778424442426617334727629299387668709205606050270810842907692932019128194";

	private static byte[] s_OAKLEY1024 = new byte[128]
	{
		255, 255, 255, 255, 255, 255, 255, 255, 201, 15,
		218, 162, 33, 104, 194, 52, 196, 198, 98, 139,
		128, 220, 28, 209, 41, 2, 78, 8, 138, 103,
		204, 116, 2, 11, 190, 166, 59, 19, 155, 34,
		81, 74, 8, 121, 142, 52, 4, 221, 239, 149,
		25, 179, 205, 58, 67, 27, 48, 43, 10, 109,
		242, 95, 20, 55, 79, 225, 53, 109, 109, 81,
		194, 69, 228, 133, 181, 118, 98, 94, 126, 198,
		244, 76, 66, 233, 166, 55, 237, 107, 11, 255,
		92, 182, 244, 6, 183, 237, 238, 56, 107, 251,
		90, 137, 159, 165, 174, 159, 36, 17, 124, 75,
		31, 230, 73, 40, 102, 81, 236, 230, 83, 129,
		255, 255, 255, 255, 255, 255, 255, 255
	};

	private static string s_DECIMAL1536 = "2410312426921032588552076022197566074856950548502459942654116941958108831682612228890093858261341614673227141477904012196503648957050582631942730706805009223062734745341073406696246014589361659774041027169249453200378729434170325843778659198143763193776859869524088940195577346119843545301547043747207749969763750084308926339295559968882457872412993810129130294592999947926365264059284647209730384947211681434464714438488520940127459844288859336526896320919633919";

	private static byte[] s_OAKLEY1536 = new byte[192]
	{
		255, 255, 255, 255, 255, 255, 255, 255, 201, 15,
		218, 162, 33, 104, 194, 52, 196, 198, 98, 139,
		128, 220, 28, 209, 41, 2, 78, 8, 138, 103,
		204, 116, 2, 11, 190, 166, 59, 19, 155, 34,
		81, 74, 8, 121, 142, 52, 4, 221, 239, 149,
		25, 179, 205, 58, 67, 27, 48, 43, 10, 109,
		242, 95, 20, 55, 79, 225, 53, 109, 109, 81,
		194, 69, 228, 133, 181, 118, 98, 94, 126, 198,
		244, 76, 66, 233, 166, 55, 237, 107, 11, 255,
		92, 182, 244, 6, 183, 237, 238, 56, 107, 251,
		90, 137, 159, 165, 174, 159, 36, 17, 124, 75,
		31, 230, 73, 40, 102, 81, 236, 228, 91, 61,
		194, 0, 124, 184, 161, 99, 191, 5, 152, 218,
		72, 54, 28, 85, 211, 154, 105, 22, 63, 168,
		253, 36, 207, 95, 131, 101, 93, 35, 220, 163,
		173, 150, 28, 98, 243, 86, 32, 133, 82, 187,
		158, 213, 41, 7, 112, 150, 150, 109, 103, 12,
		53, 78, 74, 188, 152, 4, 241, 116, 108, 8,
		202, 35, 115, 39, 255, 255, 255, 255, 255, 255,
		255, 255
	};

	public string DH_passphrase
	{
		get
		{
			return m_SysAuthPassphrase;
		}
		set
		{
			ResetToDefaults();
			m_SysAuthPassphrase = value;
			ASBSolutionValid = true;
		}
	}

	public byte[] DH_certificate => m_SysAuthCertificate;

	public SysAuthParameters(string asbSolutionName = null)
	{
		SvcTrace.DiagDiagnostics.TraceEvent(TraceEventType.Information, 0, "SysAuthParameters constructor with asbSolutionName = {0}", string.IsNullOrEmpty(asbSolutionName) ? "<null>" : asbSolutionName);
		ASBSolutionName = asbSolutionName;
		ASBSolutionValid = false;
		ResetToDefaults();
		LoadASBSolution();
	}

	public void ResetToDefaults()
	{
		ASBSolutionValid = false;
		DH_KeySize = DH_KeySize_Dft;
		DH_SecretSize = DH_SecretSize_Dft;
		m_SysAuthPassphrase = DH_passphrase_Dft;
		m_SysAuthCertificate = null;
		ConnectionLifetime = ConnectionLifetime_Dft;
		SaltValue = SaltValue_Dft;
		hashAlgorithm = hashAlgorithm_Dft;
		PasswordIterations = PasswordIterations_Dft;
		InitialVector = InitialVector_Dft;
		KeySize = KeySize_Dft;
		GenerateKey();
	}

	private void LoadASBSolution()
	{
		SvcTrace.DiagDiagnostics.TraceEvent(TraceEventType.Information, 0, "LoadASBSolution entry");
		try
		{
			if (string.IsNullOrEmpty(ASBSolutionName))
			{
				ASBSolutionName = SvcUtilities.ReadKeyValue(string.Empty, "DefaultASBSolution");
				if (string.IsNullOrEmpty(ASBSolutionName))
				{
					SvcTrace.DiagException.TraceEvent(TraceEventType.Error, 0, "LoadASBSolution: Unable to get default ASB solution name");
					ASBSolutionValid = false;
				}
				SvcTrace.DiagDiagnostics.TraceEvent(TraceEventType.Information, 0, "LoadASBSolution created with empty solution name, resetting to default '{0}'", string.IsNullOrEmpty(ASBSolutionName) ? "<null>" : ASBSolutionName);
			}
			ASBSolutionValid = false;
			if (!string.IsNullOrEmpty(ASBSolutionName))
			{
				SvcTrace.DiagDiagnostics.TraceEvent(TraceEventType.Information, 0, "LoadASBSolution: Using solution {0}", ASBSolutionName);
				if (string.IsNullOrEmpty(RegistryHandler.GetSolutionPassphrase(ASBSolutionName, out var passphrase)) && !string.IsNullOrEmpty(passphrase))
				{
					DH_passphrase = passphrase;
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "Certificate")) != null)
				{
					m_SysAuthCertificate = Encoding.UTF8.GetBytes(passphrase);
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "saltValue")) != null)
				{
					SaltValue = passphrase;
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "HashAlgorthim")) != null)
				{
					hashAlgorithm = passphrase;
				}
				SvcTrace.DiagDiagnostics.TraceEvent(TraceEventType.Information, 0, "LoadASBSolution: Using hashAlgorithm {0}", hashAlgorithm);
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "passowordIterations")) != null)
				{
					PasswordIterations = int.Parse(passphrase);
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "initailizationVector")) != null)
				{
					InitialVector = passphrase;
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "keySize")) != null)
				{
					int.TryParse(passphrase, out KeySize);
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "Prime")) != null)
				{
					BigInteger.TryParse(passphrase, out DH_p);
				}
				if ((passphrase = SvcUtilities.ReadKeyValue(RegKeyRelativePath + ASBSolutionName, "Generator")) != null)
				{
					BigInteger.TryParse(passphrase, out DH_g);
				}
				ASBSolutionValid = true;
			}
		}
		catch (Exception ex)
		{
			SvcTrace.DiagException.TraceEvent(TraceEventType.Error, 0, "LoadASBSolution: Exception caught: {0}", ex.Message);
			ASBSolutionValid = false;
		}
	}

	private void GenerateKey()
	{
		if (DH_KeySize == 768)
		{
			BigInteger.TryParse(s_DECIMAL768, out DH_p);
		}
		else if (DH_KeySize == 1024)
		{
			BigInteger.TryParse(s_DECIMAL1024, out DH_p);
		}
		else
		{
			if (DH_KeySize != 1536)
			{
				throw new ArgumentException("Invalid bit size.");
			}
			BigInteger.TryParse(s_DECIMAL1536, out DH_p);
		}
		DH_g = new BigInteger(22);
	}
}