Renci.SshNet.Common.DerData.ReadLength C# (CSharp) Метод

        private int ReadLength()
        {
            int length = ReadByte();

            if (length == 0x80)
            {
                throw new NotSupportedException("Indefinite-length encoding is not supported.");
            }

            if (length > 127)
            {
                var size = length & 0x7f;

                // Note: The invalid long form "0xff" (see X.690 8.1.3.5c) will be caught here
                if (size > 4)
                    throw new InvalidOperationException(string.Format("DER length is '{0}' and cannot be more than 4 bytes.", size));

                length = 0;
                for (var i = 0; i < size; i++)
                {
                    int next = ReadByte();

                    length = (length << 8) + next;
                }

                if (length < 0)
                    throw new InvalidOperationException("Corrupted data - negative length found");

                //if (length >= limit)   // after all we must have read at least 1 byte
                //    throw new IOException("Corrupted stream - out of bounds length found");
            }

            return length;
        }