コード例 #1
0
        /// <summary>
        /// Calculates a MAC using the X9.19 algorithm.
        /// </summary>
        /// <param name="data">Hex data to MAC.</param>
        /// <param name="key">MACing key.</param>
        /// <param name="iv">Initial vector.</param>
        /// <param name="blockType">Message block to MAC.</param>
        /// <returns>MAC result.</returns>
        public static string MacHexData(string data, HexKey key, string iv, IsoX919BlockType blockType)
        {
            if (data.Length % 16 != 0)
            {
                data = Iso9797Pad.PadHexString(data, Iso9797PaddingMethodType.PaddingMethod1);
            }

            for (var i = 0; i <= (data.Length / 16) - 1; i++)
            {
                iv = iv.XorHex(data.Substring(i * 16, 16));
                iv = TripleDes.DesEncrypt(key.PartA, iv);
            }

            var result = iv;

            if (blockType == IsoX919BlockType.FinalBlock || blockType == IsoX919BlockType.OnlyBlock)
            {
                result = TripleDes.DesDecrypt(key.PartB, iv);
                result = TripleDes.DesEncrypt(key.PartA, result);
            }

            return(result);
        }
コード例 #2
0
 public void TestByteDes(byte[] key, byte[] data, byte[] expected)
 {
     Assert.AreEqual(expected, TripleDes.DesEncrypt(key, data));
     Assert.AreEqual(data, TripleDes.DesDecrypt(key, expected));
 }