protected bool GeneralDecode(Stream xdata)
{
bool flag = false;
long num = xdata.Length - xdata.Position;
this.tag = (byte)xdata.ReadByte();
long position = xdata.Position;
this.dataLength = Asn1Util.DerLengthDecode(xdata, ref this.isIndefiniteLength);
if (this.dataLength < 0L)
{
return(flag);
}
this.lengthFieldBytes = xdata.Position - position;
if (num < this.dataLength + 1L + this.lengthFieldBytes || (this.ParentNode == null || ((int)this.ParentNode.tag & 32) == 0) && (((int)this.tag & 31) <= 0 || ((int)this.tag & 31) > 30))
{
return(flag);
}
if (this.tag == (byte)3)
{
if (this.dataLength < 1L)
{
return(flag);
}
this.unusedBits = (byte)xdata.ReadByte();
this.data = new byte[this.dataLength - 1L];
xdata.Read(this.data, 0, (int)(this.dataLength - 1L));
}
else
{
this.data = new byte[this.dataLength];
xdata.Read(this.data, 0, (int)this.dataLength);
}
return(true);
}
protected bool ListDecode(Stream xdata)
{
bool flag = false;
long position1 = xdata.Position;
try
{
long num = xdata.Length - xdata.Position;
this.tag = (byte)xdata.ReadByte();
long position2 = xdata.Position;
this.dataLength = Asn1Util.DerLengthDecode(xdata, ref this.isIndefiniteLength);
if (this.dataLength < 0L || num < this.dataLength)
{
return(flag);
}
this.lengthFieldBytes = xdata.Position - position2;
long dataOffset = this.dataOffset + 1L + this.lengthFieldBytes;
if (this.tag == (byte)3)
{
this.unusedBits = (byte)xdata.ReadByte();
--this.dataLength;
++dataOffset;
}
if (this.dataLength <= 0L)
{
return(flag);
}
Stream xdata1 = (Stream) new MemoryStream((int)this.dataLength);
byte[] buffer = new byte[this.dataLength];
xdata.Read(buffer, 0, (int)this.dataLength);
if (this.tag == (byte)3)
{
++this.dataLength;
}
xdata1.Write(buffer, 0, buffer.Length);
xdata1.Position = 0L;
while (xdata1.Position < xdata1.Length)
{
Asn1Node xdata2 = new Asn1Node(this, dataOffset);
xdata2.parseEncapsulatedData = this.parseEncapsulatedData;
long position3 = xdata1.Position;
if (!xdata2.InternalLoadData(xdata1))
{
return(flag);
}
this.AddChild(xdata2);
long position4 = xdata1.Position;
dataOffset += position4 - position3;
}
flag = true;
return(flag);
}
finally
{
if (!flag)
{
xdata.Position = position1;
this.ClearAll();
}
}
}
