Howto make a encrypter with the decrypter function? Help

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Hello everyone, I have this function that decrypts and I want to do the opposite I want to use the same one to encrypt strings. How can I do this?

C#

public string Decrypt(string cipherText, int Iv, string[] pass)
   {
     string password = "sdHBDHC^BGGijvn";
     byte[] buffer = Convert.FromBase64String(cipherText);
     using (Aes aes = Aes.Create())
     {
       Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, new byte[13]
       {
         (byte) 73,
         (byte) 118,
         (byte) 97,
         (byte) 110,
         (byte) 32,
         (byte) 77,
         (byte) 101,
         (byte) 100,
         (byte) 118,
         (byte) 101,
         (byte) 100,
         (byte) 101,
         (byte) 118
       });
       aes.Key = rfc2898DeriveBytes.GetBytes(32);
       aes.IV = rfc2898DeriveBytes.GetBytes(16);
       using (MemoryStream memoryStream = new MemoryStream())
       {
         using (CryptoStream cryptoStream = new CryptoStream((Stream) memoryStream, aes.CreateDecryptor(), CryptoStreamMode.Write))
         {
           cryptoStream.Write(buffer, 0, buffer.Length);
           cryptoStream.Close();
         }
         cipherText = Encoding.Unicode.GetString(memoryStream.ToArray());
       }
     }
     return cipherText;
   }

What I have tried:

I can decrypt with this function strings that were encrypted with it but I want to do the opposite I want to encrypt strings using this function. I know that some things need to be changed to create the encript. but how would that look? Thank you.

Posted 3-Apr-18 3:34am

ShakalX

Updated 3-Apr-18 16:27pm

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Comments

[no name] 3-Apr-18 9:44am

Here is an example, I hope it fits: Rfc2898DeriveBytes Class (System.Security.Cryptography)[^]

ShakalX 3-Apr-18 10:49am

Hi. Thank you, but I'm an apprentice. I do not quite understand these things. I thought I could use the base script to do the encript. For it must have few modifications to make.

2 solutions

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RickZeeland · Accepted Answer · 2018-04-03T07:00:00

Solution 1

See CodeProject article here: Simple encrypting and decrypting data in C#[^]
And: encryption - Encrypting & Decrypting a String in C# - Stack Overflow[^]

Posted 3-Apr-18 7:00am

RickZeeland

Comments

ShakalX 3-Apr-18 22:28pm

Thanks for help. it work. =)

ShakalX · Accepted Answer · 2018-04-03T16:29:00

Solution thanks for all

public static string Encrypt1(string clearText, int Iv, string[] pass)
           {
           string EncryptionKey = "sdHBDHC^BGGijvn";
           byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
           using (Aes encryptor = Aes.Create())
               {
               Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[13] { 73, 118, 97, 110, 32, 77, 101, 100, 118, 101, 100, 101, 118 });
               encryptor.Key = pdb.GetBytes(32);
               encryptor.IV = pdb.GetBytes(16);
               using (MemoryStream ms = new MemoryStream())
                   {
                   using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
                       {
                       cs.Write(clearBytes, 0, clearBytes.Length);
                       cs.Close();
                       }
                   clearText = Convert.ToBase64String(ms.ToArray());
                   }
               }
           return clearText;
           }