public DerExternal(
Asn1EncodableVector vector)
{
int offset = 0;
Asn1Object enc = GetObjFromVector(vector, offset);
if (enc is DerObjectIdentifier)
{
directReference = (DerObjectIdentifier)enc;
offset++;
enc = GetObjFromVector(vector, offset);
}
if (enc is DerInteger)
{
indirectReference = (DerInteger)enc;
offset++;
enc = GetObjFromVector(vector, offset);
}
if (!(enc is DerTaggedObject))
{
dataValueDescriptor = (Asn1Object)enc;
offset++;
enc = GetObjFromVector(vector, offset);
}
if (!(enc is DerTaggedObject))
{
throw new InvalidOperationException(
"No tagged object found in vector. Structure doesn't seem to be of type External");
}
if (vector.Count != offset + 1)
{
throw new ArgumentException("input vector too large", "vector");
}
if (!(enc is DerTaggedObject))
{
throw new ArgumentException("No tagged object found in vector. Structure doesn't seem to be of type External", "vector");
}
DerTaggedObject obj = (DerTaggedObject)enc;
// Use property accessor to include check on value
Encoding = obj.TagNo;
if (encoding < 0 || encoding > 2)
{
throw new InvalidOperationException("invalid encoding value");
}
externalContent = obj.GetObject();
}
/**
* Creates a new instance of DerExternal
* See X.690 for more informations about the meaning of these parameters
* @param directReference The direct reference or <code>null</code> if not set.
* @param indirectReference The indirect reference or <code>null</code> if not set.
* @param dataValueDescriptor The data value descriptor or <code>null</code> if not set.
* @param externalData The external data in its encoded form.
*/
public DerExternal(DerObjectIdentifier directReference, DerInteger indirectReference, Asn1Object dataValueDescriptor, DerTaggedObject externalData)
: this(directReference, indirectReference, dataValueDescriptor, externalData.TagNo, externalData.ToAsn1Object())
{
}