Matching .NET Framework AES Encryption Results

AES string encryption in Ruby and the equivalent C# code using the .NET Framework.

Downloads for Windows/Linux and Install Instructions

require 'rubygems'
require 'chilkat'


#  First, here's the C# code we're trying to match:

#  RijndaelManaged rman = new RijndaelManaged();
#  rman.Mode = CipherMode.CBC;
#  rman.Padding = PaddingMode.PKCS7;
#  rman.KeySize = 256;

#  Use a 32-byte key (for 256-bit encryption)
#  byte [] keyBytes = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
#  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 };

#  The IV for AES is 16 bytes, because the AES block size is 16.
#  byte [] ivBytes = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

#  ICryptoTransform encryptor = rman.CreateEncryptor(keyBytes, ivBytes);

#  byte [] plainText = System.Text.Encoding.UTF8.GetBytes("This is a test");

#  byte [] encrypted = encryptor.TransformFinalBlock(plainText, 0, plainText.Length);

#  Output is 31k+86baFy9GJKQ9Y1ebCw==
#  textBox1.Text = Convert.ToBase64String(encrypted);

#  The following Chilkat code produces the same output:
crypt = Chilkat::CkCrypt2.new()

success = crypt.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print "Crypt component unlock failed" + "\n"
    exit
end

crypt.put_CryptAlgorithm("aes")
crypt.put_CipherMode("cbc")
crypt.put_KeyLength(256)
crypt.put_PaddingScheme(0)
crypt.put_EncodingMode("base64")

ivHex = "000102030405060708090A0B0C0D0E0F"
keyHex = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"
crypt.SetEncodedIV(ivHex,"hex")
crypt.SetEncodedKey(keyHex,"hex")

print crypt.encryptStringENC("This is a test") + "\n"