Encrypt string with encryption Key - CSharp System.Security.Cryptography

CSharp examples for System.Security.Cryptography:Encrypt Decrypt

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Description

Encrypt string with encryption Key

Demo Code


using System.Text;
using System.Security.Cryptography;
using System.Linq;
using System.IO;/* w  ww .  j  ava2s.  c o m*/
using System.Collections.Generic;
using System;

public class Main{
        public static string Encrypt(string text, string encryptionKey)
        {
            // Check for valid length encryption key 
            if (encryptionKey.Length < 8)
            {
                throw new Exception("Encryption Key must be a minimum of 8 characters long");
            }

            Key = System.Text.Encoding.UTF8.GetBytes(encryptionKey.Substring(0, 8));
            var des = new DESCryptoServiceProvider();

            // Convert our input string to a byte array
            var inputByteArray = Encoding.UTF8.GetBytes(text);

            // Now encrypt the bytearray
            var ms = new MemoryStream();
            var cs = new CryptoStream(ms, des.CreateEncryptor(Key, IV), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            // Now return the byte array as a "safe for XMLDOM" Base64 String
            return Convert.ToBase64String(ms.ToArray());
        }
}

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