在c＃中使用AES-256对称算法（AES / ECB / PKCS7Padding）的加密方法

Question

I want to encrypt a string using AES 256-bit encryption algorithm with ECB and PKCS7Padding. I had gone through many sites but none of them were suitable. Please suggest a solution

Answer 1

public static string Encrypt(string PlainText, string Password,
               string Salt = "Kosher", string HashAlgorithm = "SHA1",
               int PasswordIterations = 2, string InitialVector = "OFRna73m*aze01xY",
               int KeySize = 256)
           {
               if (string.IsNullOrEmpty(PlainText))
                   return "";
               byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
               byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
               byte[] PlainTextBytes = Encoding.UTF8.GetBytes(PlainText);
               PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
               byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
               RijndaelManaged SymmetricKey = new RijndaelManaged();
               SymmetricKey.Mode = CipherMode.CBC;
               byte[] CipherTextBytes = null;
               using (ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(KeyBytes, InitialVectorBytes))
               {
                   using (MemoryStream MemStream = new MemoryStream())
                   {
                       using (CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write))
                       {
                           CryptoStream.Write(PlainTextBytes, 0, PlainTextBytes.Length);
                           CryptoStream.FlushFinalBlock();
                           CipherTextBytes = MemStream.ToArray();
                           MemStream.Close();
                           CryptoStream.Close();
                       }
                   }
               }
               SymmetricKey.Clear();
               return Convert.ToBase64String(CipherTextBytes);
           }

source

Note: you can change the mode by changing SymmetricKey.Mode = CipherMode.CBC;

and you can add SymmetricKey.Padding = PaddingMode.PKCS7; for padding

Answer 2

with bounty castle you should be able to do this :

cipher = CipherUtilities.GetCipher("AES/ECB/PKCS7"); 
cipher.Init(false, new KeyParameter(key));