brgin of encryption

2021-09-23 13:33:03 +02:00
parent 3cf0197672
commit a8a07f44c3
3 changed files with 95 additions and 42 deletions
--- a/PolyChat/Models/FileManager.cs
+++ b/PolyChat/Models/FileManager.cs
@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+using System.Security.Cryptography;
+
+
+namespace PolyChat.Models
+{
+    class FileManager
+    {
+        public static String encrypt(String toEncrypt)
+        {
+            try {
+                string textToEncrypt = toEncrypt;
+                string ToReturn = "";
+                string publickey = "santhosh";
+                string secretkey = "engineer";
+                byte[] secretkeyByte = { };
+                secretkeyByte = System.Text.Encoding.UTF8.GetBytes(secretkey);
+                byte[] publickeybyte = { };
+                publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
+                MemoryStream ms = null;
+                CryptoStream cs = null;
+                byte[] inputbyteArray = System.Text.Encoding.UTF8.GetBytes(textToEncrypt);
+                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
+                {
+                    ms = new MemoryStream();
+                    cs = new CryptoStream(ms, des.CreateEncryptor(publickeybyte, secretkeyByte), CryptoStreamMode.Write);
+                    cs.Write(inputbyteArray, 0, inputbyteArray.Length);
+                    cs.FlushFinalBlock();
+                    ToReturn = Convert.ToBase64String(ms.ToArray());
+                }
+                return ToReturn;
+            } catch (Exception ex)
+            {
+                throw new Exception(ex.Message, ex.InnerException);
+            }
+
+        }
+
+
+        public static String decrypt(String toDecrypt)
+        {
+            try
+            {
+                string textToDecrypt = toDecrypt;
+                string ToReturn = "";
+                string publickey = "santhosh";
+                string privatekey = "engineer";
+                byte[] privatekeyByte = { };
+                privatekeyByte = System.Text.Encoding.UTF8.GetBytes(privatekey);
+                byte[] publickeybyte = { };
+                publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
+                MemoryStream ms = null;
+                CryptoStream cs = null;
+                byte[] inputbyteArray = new byte[textToDecrypt.Replace(" ", "+").Length];
+                inputbyteArray = Convert.FromBase64String(textToDecrypt.Replace(" ", "+"));
+                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
+                {
+                    ms = new MemoryStream();
+                    cs = new CryptoStream(ms, des.CreateDecryptor(publickeybyte, privatekeyByte), CryptoStreamMode.Write);
+                    cs.Write(inputbyteArray, 0, inputbyteArray.Length);
+                    cs.FlushFinalBlock();
+                    Encoding encoding = Encoding.UTF8;
+                    ToReturn = encoding.GetString(ms.ToArray());
+                }
+                return ToReturn;
+            }
+            catch (Exception ae)
+            {
+                throw new Exception(ae.Message, ae.InnerException);
+            }
+        }
+    }
+
+
+
+
+
+
+}