private static String _enCrypt(SymmetricAlgorithm Algorithm, String ValueToEnCrypt)
{
// 将字符串保存到字节数组中
Byte [] InputByteArray = Encoding.UTF8.GetBytes(ValueToEnCrypt);
// 获得需要的密钥
String EncryptionKey = EncryptionHelper.EncryptionKey;
// 创建一个key.
Byte [] Key = ASCIIEncoding.ASCII.GetBytes(EncryptionKey);
Algorithm.Key = (Byte [])ArrayFunctions.ReDim(Key, Algorithm.Key.Length);
Algorithm.IV = (Byte [])ArrayFunctions.ReDim(Key, Algorithm.IV.Length);
MemoryStream MemStream = new MemoryStream();
CryptoStream CrypStream = new CryptoStream(MemStream, Algorithm.CreateEncryptor(), CryptoStreamMode.Write);
// Write the byte array into the crypto stream( It will end up in the memory stream).
CrypStream.Write(InputByteArray, 0, InputByteArray.Length);
CrypStream.FlushFinalBlock();
// Get the data back from the memory stream, and into a string.
StringBuilder StringBuilder = new StringBuilder();
for (Int32 i = 0; i < MemStream.ToArray().Length; i++)
{
Byte ActualByte = MemStream.ToArray()[i];
// Format the actual byte as HEX.
StringBuilder.AppendFormat("{0:X2}", ActualByte);
}
return(StringBuilder.ToString());
}
private static String _deCrypt(SymmetricAlgorithm Algorithm, String ValueToDeCrypt)
{
// Put the input string into the byte array.
Byte [] InputByteArray = new Byte[ValueToDeCrypt.Length / 2];
for (Int32 i = 0; i < ValueToDeCrypt.Length / 2; i++)
{
Int32 Value = (Convert.ToInt32(ValueToDeCrypt.Substring(i * 2, 2), 16));
InputByteArray[i] = (Byte)Value;
}
// Create the crypto objects.
String EncryptionKey = EncryptionHelper.EncryptionKey;
// Create the key.
Byte [] Key = ASCIIEncoding.ASCII.GetBytes(EncryptionKey);
Algorithm.Key = (Byte [])ArrayFunctions.ReDim(Key, Algorithm.Key.Length);
Algorithm.IV = (Byte [])ArrayFunctions.ReDim(Key, Algorithm.IV.Length);
MemoryStream MemStream = new MemoryStream();
CryptoStream CrypStream = new CryptoStream(MemStream, Algorithm.CreateDecryptor(), CryptoStreamMode.Write);
// Flush the data through the crypto stream into the memory stream.
CrypStream.Write(InputByteArray, 0, InputByteArray.Length);
CrypStream.FlushFinalBlock();
// Get the decrypted data back from the memory stream.
StringBuilder StringBuilder = new StringBuilder();
for (Int32 i = 0; i < MemStream.ToArray().Length; i++)
{
StringBuilder.Append((Char)MemStream.ToArray()[i]);
}
return(StringBuilder.ToString());
}