| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| import java.util.Enumeration; |
| |
| /** |
| * BER TaggedObject - in ASN.1 notation this is any object preceded by |
| * a [n] where n is some number - these are assumed to follow the construction |
| * rules (as with sequences). |
| */ |
| public class BERTaggedObject |
| extends ASN1TaggedObject |
| { |
| /** |
| * @param tagNo the tag number for this object. |
| * @param obj the tagged object. |
| */ |
| public BERTaggedObject( |
| int tagNo, |
| ASN1Encodable obj) |
| { |
| super(true, tagNo, obj); |
| } |
| |
| /** |
| * @param explicit true if an explicitly tagged object. |
| * @param tagNo the tag number for this object. |
| * @param obj the tagged object. |
| */ |
| public BERTaggedObject( |
| boolean explicit, |
| int tagNo, |
| ASN1Encodable obj) |
| { |
| super(explicit, tagNo, obj); |
| } |
| |
| /** |
| * create an implicitly tagged object that contains a zero |
| * length sequence. |
| */ |
| public BERTaggedObject( |
| int tagNo) |
| { |
| super(false, tagNo, new BERSequence()); |
| } |
| |
| boolean isConstructed() |
| { |
| if (!empty) |
| { |
| if (explicit) |
| { |
| return true; |
| } |
| else |
| { |
| ASN1Primitive primitive = obj.toASN1Primitive().toDERObject(); |
| |
| return primitive.isConstructed(); |
| } |
| } |
| else |
| { |
| return true; |
| } |
| } |
| |
| int encodedLength() |
| throws IOException |
| { |
| if (!empty) |
| { |
| ASN1Primitive primitive = obj.toASN1Primitive(); |
| int length = primitive.encodedLength(); |
| |
| if (explicit) |
| { |
| return StreamUtil.calculateTagLength(tagNo) + StreamUtil.calculateBodyLength(length) + length; |
| } |
| else |
| { |
| // header length already in calculation |
| length = length - 1; |
| |
| return StreamUtil.calculateTagLength(tagNo) + length; |
| } |
| } |
| else |
| { |
| return StreamUtil.calculateTagLength(tagNo) + 1; |
| } |
| } |
| |
| void encode( |
| ASN1OutputStream out) |
| throws IOException |
| { |
| out.writeTag(BERTags.CONSTRUCTED | BERTags.TAGGED, tagNo); |
| out.write(0x80); |
| |
| if (!empty) |
| { |
| if (!explicit) |
| { |
| Enumeration e; |
| if (obj instanceof ASN1OctetString) |
| { |
| if (obj instanceof BEROctetString) |
| { |
| e = ((BEROctetString)obj).getObjects(); |
| } |
| else |
| { |
| ASN1OctetString octs = (ASN1OctetString)obj; |
| BEROctetString berO = new BEROctetString(octs.getOctets()); |
| e = berO.getObjects(); |
| } |
| } |
| else if (obj instanceof ASN1Sequence) |
| { |
| e = ((ASN1Sequence)obj).getObjects(); |
| } |
| else if (obj instanceof ASN1Set) |
| { |
| e = ((ASN1Set)obj).getObjects(); |
| } |
| else |
| { |
| throw new RuntimeException("not implemented: " + obj.getClass().getName()); |
| } |
| |
| while (e.hasMoreElements()) |
| { |
| out.writeObject((ASN1Encodable)e.nextElement()); |
| } |
| } |
| else |
| { |
| out.writeObject(obj); |
| } |
| } |
| |
| out.write(0x00); |
| out.write(0x00); |
| } |
| } |