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Common/DTS.Common.Security/Encryption.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DTS.Common.Security
+{
+    public static class Encryption
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="plainText"></param>
+        /// <param name="key"></param>
+        /// <param name="iv"></param>
+        /// <returns></returns>
+        public static byte[] EncryptStringToBytes(string plainText, byte[] key, byte[] iv)
+        {
+
+            // Check arguments. 
+            if (plainText == null || plainText.Length <= 0) throw new ArgumentNullException(nameof(plainText));
+            if (key == null || key.Length <= 0) throw new ArgumentNullException(nameof(key));
+            if (iv == null || iv.Length <= 0) throw new ArgumentNullException(nameof(key));
+            byte[] encrypted;
+            // Create an RijndaelManaged object 
+            // with the specified key and IV. 
+
+            using (var rijAlg = new AesCryptoServiceProvider())
+            {
+                rijAlg.Key = key;
+                rijAlg.IV = iv;
+
+                // Create a decrytor to perform the stream transform.
+                var encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
+
+                // Create the streams used for encryption. 
+                using (var msEncrypt = new MemoryStream())
+                {
+                    using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
+                    {
+                        using (var swEncrypt = new StreamWriter(csEncrypt))
+                        {
+
+                            //Write all data to the stream.
+                            swEncrypt.Write(plainText);
+                        }
+                        encrypted = msEncrypt.ToArray();
+                    }
+                }
+            }
+
+
+            // Return the encrypted bytes from the memory stream. 
+            return encrypted;
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="cipherText"></param>
+        /// <param name="key"></param>
+        /// <param name="iv"></param>
+        /// <returns></returns>
+        public static string DecryptStringFromBytes(byte[] cipherText, byte[] key, byte[] iv)
+        {
+            // Check arguments. 
+            if (cipherText == null || cipherText.Length <= 0) throw new ArgumentNullException(nameof(cipherText));
+            if (key == null || key.Length <= 0) throw new ArgumentNullException(nameof(key));
+            if (iv == null || iv.Length <= 0) throw new ArgumentNullException(nameof(key));
+
+            // Declare the string used to hold 
+            // the decrypted text. 
+            string plaintext = null;
+
+            // Create an RijndaelManaged object 
+            // with the specified key and IV. 
+            using (var rijAlg = new AesCryptoServiceProvider())
+            {
+                rijAlg.Key = key;
+                rijAlg.IV = iv;
+
+                // Create a decrytor to perform the stream transform.
+                var decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);
+
+                // Create the streams used for decryption. 
+                using (var msDecrypt = new MemoryStream(cipherText))
+                {
+                    using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
+                    {
+                        using (var srDecrypt = new StreamReader(csDecrypt))
+                        {
+
+                            // Read the decrypted bytes from the decrypting stream 
+                            // and place them in a string.
+                            plaintext = srDecrypt.ReadToEnd();
+                        }
+                    }
+                }
+            }
+
+            return plaintext;
+        }
+
+    }
+}