public override int Encode()
{
int length = 0;
length += extnID.Encode();
if (critical != null)
{
length += critical.Encode();
}
length += extnValue.Encode();
byte[] lengthBytes = EncodeLength(length);
derValue = new byte[1 + lengthBytes.Length + length];
derValue[0] = 0x30; // sequence
int d = 1;
Array.Copy(lengthBytes, 0, derValue, d, lengthBytes.Length);
d += lengthBytes.Length;
Array.Copy(extnID.derValue, 0, derValue, d, extnID.derValue.Length);
d += extnID.derValue.Length;
if (critical != null)
{
Array.Copy(critical.derValue, 0, derValue, d, critical.derValue.Length);
d += critical.derValue.Length;
}
Array.Copy(extnValue.derValue, 0, derValue, d, extnValue.derValue.Length);
d += extnValue.derValue.Length;
PrependContextTag();
return(derValue.Length);
}
// TODO: note 4.1.2.9 of RFC5280 - there are some additional requirements on CAs
// especially regarding the optional path length stuff
public void ExtensionBasicConstraints(bool ca)
{
if (extensions == null)
{
extensions = new AsnExtensions();
}
AsnBoolean caFlag = new AsnBoolean(ca);
int length = caFlag.Encode();
byte[] bytes = new byte[length + 2];
bytes[0] = 0x30; // it's a sequence
bytes[1] = (byte)length;
Array.Copy(caFlag.derValue, 0, bytes, 2, caFlag.derValue.Length);
AsnExtension extension = new AsnExtension(new AsnOid("2.5.29.19"), true, bytes);
extensions.extensions.Add(extension);
}