TripleDES

public static string Encrypt(string input, string key)
{
  byte[] inputArray = UTF8Encoding.UTF8.GetBytes(input);
	TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
	tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
	tripleDES.Mode = CipherMode.ECB;
	tripleDES.Padding = PaddingMode.PKCS7;
	ICryptoTransform cTransform = tripleDES.CreateEncryptor();
	byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
	tripleDES.Clear();
	return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}

public static string Decrypt(string input, string key)
{
	byte[] inputArray = Convert.FromBase64String(input);
	TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
	tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
	tripleDES.Mode = CipherMode.ECB;
	tripleDES.Padding = PaddingMode.PKCS7;
	ICryptoTransform cTransform = tripleDES.CreateDecryptor();
	byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
	tripleDES.Clear();
	return UTF8Encoding.UTF8.GetString(resultArray);
}

I tried doing this, but I'm always getting a "OpenSSL::Cipher::CipherError: key length too short" error.

def encrypt(input, enc_key)
  cipher = OpenSSL::Cipher::Cipher.new("des-ede3")
  cipher.encrypt
  cipher.key = enc_key
  result = cipher.update(input) + cipher.final
  Base64.encode64(result)
end