public static string EncryptRJ256(string prm_text_to_encrypt)
{
RijndaelManaged rijndaelManaged = new RijndaelManaged();
rijndaelManaged.Padding = PaddingMode.Zeros;
rijndaelManaged.Mode = CipherMode.CBC;
rijndaelManaged.KeySize = 256;
rijndaelManaged.BlockSize = 256;
byte[] array = new byte[0];
byte[] rgbIV = new byte[0];
string s = Cryptographer.GenerateKeyString();
string s2 = Cryptographer.RJ256Key;
array = Encoding.UTF8.GetBytes(s);
rgbIV = Encoding.UTF8.GetBytes(s2);
ICryptoTransform transform = rijndaelManaged.CreateEncryptor(array, rgbIV);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);
byte[] bytes = Encoding.UTF8.GetBytes(prm_text_to_encrypt);
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.FlushFinalBlock();
byte[] array2 = memoryStream.ToArray();
byte[] array3 = new byte[array2.Length + array.Length];
Array.Copy(array2, 0, array3, 0, array2.Length);
Array.Copy(array, 0, array3, array2.Length, array.Length);
return(Convert.ToBase64String(array3));
}
/// <summary>
/// 32桁のIV文字列を生成します。
/// </summary>
public static string GenerateIVString()
{
string text = string.Empty;
for (int i = 0; i < 32; i++)
{
text += string.Format("{0}", Cryptographer.random());
}
return(text);
}