68 lines
3.2 KiB
C#
68 lines
3.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading.Tasks;
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namespace PrevuAPIUtils
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{
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public class EncryptionUtility
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{
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static readonly string PasswordHash = "6ACFFE9475614D989873CB421FDD6F55";
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static readonly string SaltKey = "79B34E198448417F98F665518598635F";
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static readonly string VIKey = "EEDB0E14F82C44DB";
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public static string CreateToken(string clientName,DateTime ContractEndDate, string Environment)
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{
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string data = clientName + ContractEndDate.ToString("MM/dd/yyyy") + Environment;
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return Encrypt(data);
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}
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public static string Encrypt(string data)
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{
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byte[] dataBytes = Encoding.UTF8.GetBytes(data);
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byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
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AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
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var encryptor = aes.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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// var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7};
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//var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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byte[] cipherTextBytes;
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using (var memoryStream = new MemoryStream())
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{
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using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
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{
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cryptoStream.Write(dataBytes, 0, dataBytes.Length);
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cryptoStream.FlushFinalBlock();
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cipherTextBytes = memoryStream.ToArray();
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cryptoStream.Close();
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}
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memoryStream.Close();
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}
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return Convert.ToBase64String(cipherTextBytes).Replace('+','-').Replace('/','_');
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}
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public static string parseToken(string token)
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{
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return Decrypt(token);
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}
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public static string Decrypt(string token)
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{
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byte[] cipherTextBytes = Convert.FromBase64String(token.Replace('-', '+').Replace('_', '/'));
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byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
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AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
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var decryptor = aes.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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//var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7 };
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//var decryptor = symmetricKey.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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var memoryStream = new MemoryStream(cipherTextBytes);
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var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
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byte[] plainTextBytes = new byte[cipherTextBytes.Length];
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int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
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memoryStream.Close();
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cryptoStream.Close();
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return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount).TrimEnd("\0".ToCharArray());
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}
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}
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}
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