I have hardly used C# at all, so this is not great code. I did it just now as a learning experience, cobbling it together from the MSDN examples.
I piped the out of the C# program below to the input of this Perl program:
use MIME::Base64;
use Crypt::Rijndael;
use bytes;
use strict;
use warnings;
$_ = <>;
my $in = decode_base64($_);
my $key = pack("H*", "01020304050607080910111213141516");
my $cipher = new Crypt::Rijndael $key, Crypt::Rijndael::MODE_CBC
or die "Error: $!";
$cipher->set_iv(substr($in, 0, 16));
print "out = '",
unpack("N/A", $cipher->decrypt(substr($in, 16))),
"'\n";
And here is the C# program:
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Net;
public class main
{
public static void Main(string[] args)
{
byte[] key = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16};
byte[] IV;
string original = "This is a test.";
ASCIIEncoding textConverter = new ASCIIEncoding();
RijndaelManaged myRijndael = new RijndaelManaged();
byte[] encrypted;
byte[] toEncrypt;
byte[] encLen;
myRijndael.Mode = CipherMode.CBC;
//Create a new initialization vector.
myRijndael.GenerateIV();
IV = myRijndael.IV;
//Get an encryptor.
ICryptoTransform encryptor = myRijndael.CreateEncryptor(key, IV);
//Encrypt the data.
MemoryStream msEncrypt = new MemoryStream();
// I'm using base64 encoding
CryptoStream b64 = new CryptoStream(msEncrypt,
new ToBase64Transform(), CryptoStreamMode.Write);
b64.Write(IV, 0, IV.Length); // Write IV before encryption
CryptoStream csEncrypt = new CryptoStream(b64,
encryptor, CryptoStreamMode.Write);
//Convert the data to a byte array.
toEncrypt = textConverter.GetBytes(original);
// Get the string length and convert to bytes in network order
encLen = BitConverter.GetBytes(
IPAddress.HostToNetworkOrder(toEncrypt.Length));
csEncrypt.Write(encLen, 0, encLen.Length);
//Write all data to the crypto stream and flush it.
csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
csEncrypt.FlushFinalBlock();
//Get encrypted array of bytes.
encrypted = msEncrypt.ToArray();
// Here we write to console, but of course you
// may want to include it in an XML response
Console.WriteLine(textConverter.GetString(encrypted));
}
}
