Added encrytion method

seranet/Secrets/Encrypt.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Text;
+using System.IO;
+using System.Security.Cryptography;
+using Microsoft.Extensions.Options;
+
+namespace Workplace.Eureka.Services.Secrets
+{
+    public class Encrypt
+    {
+        readonly string PasswordHash ="SampleHash";
+        readonly string SaltKey = "SampleSalt";
+        readonly string VIKey = "SampleVI";
+
+
+
+        public string Decrypts(string encryptedText)
+        {
+            try
+            {
+               byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
+
+            byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
+            var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };  
+                using (SymmetricAlgorithm symmetricKey = CreateAlgorithm())
+                {
+                     var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
+
+                    using (MemoryStream memoryStream = new MemoryStream(cipherTextBytes))
+                    {
+                        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
+                        {
+                             cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
+                             cryptoStream.FlushFinalBlock();
+                             cipherTextBytes = memoryStream.ToArray();
+                             cryptoStream.Close();
+                        }
+                     memoryStream.Close();
+                    }
+                    string encrypted_text = Convert.ToBase64String(cipherTextBytes);
+                    return encrypted_text;
+                }
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+        }
+
+        static SymmetricAlgorithm CreateAlgorithm()
+        {
+            SymmetricAlgorithm algo = Aes.Create();
+            algo.Mode = CipherMode.CBC;
+            algo.Padding = PaddingMode.None;
+
+            return algo;
+        }
+    }
+}