获取异常“加密的数据长度无效”。
private static readonly byte[] salt = Encoding.ASCII.GetBytes("S@sh@kt@ VMS");
public static string Encrypt(string textToEncrypt, string encryptionPassword)
{
byte[] encryptedBytes = null;
try
{
var algorithm = GetAlgorithm(encryptionPassword);
algorithm.Padding = PaddingMode.None;
using (ICryptoTransform encryptor = algorithm.CreateEncryptor(algorithm.Key, algorithm.IV))
{
byte[] bytesToEncrypt = Encoding.UTF8.GetBytes(textToEncrypt);
encryptedBytes = InMemoryCrypt(bytesToEncrypt, encryptor);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return Convert.ToBase64String(encryptedBytes);
}
// Performs an in-memory encrypt/decrypt transformation on a byte array.
private static byte[] InMemoryCrypt(byte[] data, ICryptoTransform transform)
{
MemoryStream memory = new MemoryStream();
using (Stream stream = new CryptoStream(memory, transform, CryptoStreamMode.Write))
{
stream.Flush();
stream.Write(data, 0, data.Length);
//stream.FlushFinalBlock();
}
return memory.ToArray();
}
private static RijndaelManaged GetAlgorithm(string encryptionPassword)
{
// Create an encryption key from the encryptionPassword and salt.
var key = new Rfc2898DeriveBytes(encryptionPassword, salt);
// Declare that we are going to use the Rijndael algorithm with the key that we've just got.
var algorithm = new RijndaelManaged();
int bytesForKey = algorithm.KeySize/8;
int bytesForIV = algorithm.BlockSize/8;
algorithm.Key = key.GetBytes(bytesForKey);
algorithm.IV = key.GetBytes(bytesForIV);
return algorithm;
}
解密程序是：
public static string Decrypt(string encryptedText, string encryptionPassword)
{
var algorithm = GetAlgorithm(encryptionPassword);
algorithm.Padding = PaddingMode.PKCS7;
byte[] descryptedBytes;
using (ICryptoTransform decryptor = algorithm.CreateDecryptor(algorithm.Key, algorithm.IV))
{
byte[] encryptedBytes = Convert.FromBase64String(encryptedText);
descryptedBytes = InMemoryCrypt(encryptedBytes, decryptor);
}
return Encoding.UTF8.GetString(descryptedBytes);
}