Exemplo n.º 1
0
        public bool isChashValid(string encoded)
        {
            var encodedLen = encoded.Length;

            if (encodedLen != 32 && encodedLen != 48) // 160/5 = 32, 288/6 = 48
            {
                throw new Exception("wrong encoded length: " + encodedLen);
            }
            try
            {
                var chash = encodedLen == 32 ? Base32.Decode(encoded) : Convert.FromBase64String(encoded);

                var binChash  = buffer2bin(chash);
                var separated = SeparateIntoCleanDataAndChecksum(binChash);
                var cleanData = bin2buffer(separated.Item1);
                var checksum  = bin2buffer(separated.Item2);
                return(checksum.Equals(getChecksum(cleanData)));
            }
            catch
            {
                return(false);
            }
        }
Exemplo n.º 2
0
        private string GetChash(string data, int chashLength)
        {
            CheckLength(chashLength);
            var dataBytes = Encoding.UTF8.GetBytes(data);
            var hash      = createHash(chashLength == 160 ? "ripemd160" : "sha256", dataBytes);
            //console.log("hash", hash);
            var truncatedHash = chashLength == 160 ? hash.Slice(4) : hash; // drop first 4 bytes if 160
            //console.log("clean data", truncated_hash);
            var checksum = getChecksum(truncatedHash);
            //console.log("checksum", checksum);
            //console.log("checksum", buffer2bin(checksum));

            var binCleanData = buffer2bin(truncatedHash);
            var binChecksum  = buffer2bin(checksum);
            var binChash     = mixChecksumIntoCleanData(binCleanData, binChecksum);
            //console.log(binCleanData.length, binChecksum.length, binChash.length);
            var chash = bin2buffer(binChash);
            //console.log("chash     ", chash);
            var encoded = chashLength == 160 ? Base32.Encode(chash) : Convert.ToBase64String(chash);

            //console.log(encoded);

            return(encoded);
        }