Example #1
0
        public unsafe void Hkdf(string input)
        {
            var      lines    = input.Split('\n').Select(l => l.Trim().Split('=')).ToDictionary(val => val[0], val => val[1]);
            HashType hashType = (HashType)Enum.Parse(typeof(HashType), lines["Hash"], true);
            var      ikm      = StringToByteArray(lines["IKM"]);
            var      salt     = string.IsNullOrEmpty(lines["salt"]) ? new byte[0] : StringToByteArray(lines["salt"]);
            var      info     = string.IsNullOrEmpty(lines["info"]) ? new byte[0] : StringToByteArray(lines["info"]);
            var      prk      = StringToByteArray(lines["PRK"]);
            var      okm      = StringToByteArray(lines["OKM"]);

            var provider  = new HashProvider();
            var prkResult = new byte[provider.HashSize(hashType)];
            var okmResult = new byte[okm.Length];

            fixed(byte *iPtr = ikm)
            fixed(byte *sPtr  = salt)
            fixed(byte *prPtr = prkResult)
            {
                HkdfFunctions.HkdfExtract(provider, hashType, sPtr, salt.Length, iPtr, ikm.Length, prPtr, prkResult.Length);
                HkdfFunctions.HkdfExpand(provider, hashType, prPtr, prkResult.Length, new Span <byte>(info), new Span <byte>(okmResult));
            }
            Assert.Equal <byte>(prkResult, prk);
            for (int i = 0; i < okmResult.Length; i++)
            {
                Assert.Equal(okmResult[i], okm[i]);
            }
        }