Exemplo n.º 1
0
        public override void EncodeBitString(byte[] value, int numbits, bool explicitTagging, Asn1Tag tag)
        {
            if ((((numbits + 7) / 8) + 1) <= 0x3e8)
            {
                base.EncodeBitString(value, numbits, explicitTagging, tag);
            }
            else
            {
                if (explicitTagging)
                {
                    EncodeTagAndIndefLen(Asn1BitString.Tag.Class, 0x20, Asn1BitString.Tag.IdCode);
                }
                else
                {
                    OutputStream.WriteByte(0x80);
                }

                var num  = (numbits + 7) / 8;
                var num2 = numbits % 8;

                if (num2 != 0)
                {
                    num2           = 8 - num2;
                    value[num - 1] = (byte)(value[num - 1] & ((byte)~((1 << num2) - 1)));
                }

                for (var i = 0; i < num; i += 0x3e8)
                {
                    var len = num - i;

                    if (len > 0x3e8)
                    {
                        len = 0x3e8;
                        EncodeTagAndLength(Asn1BitString.Tag, len);
                    }
                    else
                    {
                        EncodeTagAndLength(Asn1BitString.Tag, len + 1);
                        OutputStream.WriteByte((byte)num2);
                    }

                    if (len > 0)
                    {
                        OutputStream.Write(value, i, len);
                    }
                }

                EncodeEoc();
            }
        }