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using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using Gestor.Common.Helpers;
namespace Gestor.Common.Security;
public class Token
{
private readonly byte[] _key = new byte[32]
{
45, 103, 73, 146, 210, 184, 220, 224, 94, 3,
114, 60, 211, 119, 21, 100, 18, 201, 230, 195,
119, 252, 73, 208, 209, 39, 222, 48, 47, 142,
94, 24
};
private readonly byte[] _initializationVector = new byte[16]
{
95, 17, 151, 243, 209, 243, 119, 80, 63, 252,
13, 180, 162, 13, 23, 218
};
private static readonly byte[] Salt = new byte[16]
{
38, 220, 255, 0, 173, 237, 122, 238, 197, 254,
7, 175, 77, 8, 34, 60
};
public bool VerifyToken(string authHeader)
{
try
{
if (!authHeader.Contains("Token"))
{
return false;
}
string ecryptedText = authHeader.Replace("Token ", "");
return DefaultDecryption(ecryptedText);
}
catch (Exception)
{
return false;
}
}
public string DefaultEncryption(long clientId, long providerId)
{
string plainText = $"{providerId}:{Functions.GetNetworkTime().ToUniversalTime().Ticks}";
return Encrypt(plainText);
}
public bool DefaultDecryption(string ecryptedText)
{
string[] textDecrypted = Decrypt(ecryptedText).Split(new char[1] { ':' });
return DefaultVerification(textDecrypted);
}
public bool DefaultVerification(string[] textDecrypted)
{
if (textDecrypted.Length < 2)
{
return false;
}
return new DateTime(long.Parse(textDecrypted[1]), DateTimeKind.Utc).Date.AddHours(5.0) >= Functions.GetNetworkTime().ToUniversalTime().Date;
}
public string Encrypt(string plainText)
{
byte[] inArray;
using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
{
ICryptoTransform transform = aesCryptoServiceProvider.CreateEncryptor(_key, _initializationVector);
using MemoryStream memoryStream = new MemoryStream();
using CryptoStream stream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);
using (StreamWriter streamWriter = new StreamWriter(stream))
{
streamWriter.Write(plainText);
}
inArray = memoryStream.ToArray();
}
return Convert.ToBase64String(inArray);
}
public string Decrypt(string plainText)
{
try
{
byte[] buffer = Convert.FromBase64String(plainText);
string result;
using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
{
ICryptoTransform transform = aesCryptoServiceProvider.CreateDecryptor(_key, _initializationVector);
using MemoryStream stream = new MemoryStream(buffer);
using CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Read);
using StreamReader streamReader = new StreamReader(stream2);
result = streamReader.ReadToEnd();
}
return result;
}
catch (Exception)
{
return null;
}
}
public string AggerEncrypt(string plain)
{
string password = "aGG3r" + Convert.ToString(1012) + "#w3BDz$";
byte[] bytes = Encoding.UTF8.GetBytes(plain);
Rijndael rijndael = Rijndael.Create();
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, Salt);
rijndael.Key = rfc2898DeriveBytes.GetBytes(32);
rijndael.IV = rfc2898DeriveBytes.GetBytes(16);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.Close();
return Convert.ToBase64String(memoryStream.ToArray());
}
public string AggerDecrypt(string cipher)
{
string password = "aGG3r" + Convert.ToString(1012) + "#w3BDz$";
byte[] array = Convert.FromBase64String(cipher);
Rijndael rijndael = Rijndael.Create();
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, Salt);
rijndael.Key = rfc2898DeriveBytes.GetBytes(32);
rijndael.IV = rfc2898DeriveBytes.GetBytes(16);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write);
cryptoStream.Write(array, 0, array.Length);
cryptoStream.Close();
byte[] bytes = memoryStream.ToArray();
return Encoding.UTF8.GetString(bytes);
}
}
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