Package org.bouncycastle.asn1

Class ASN1TaggedObject

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.ASN1Primitive

org.bouncycastle.asn1.ASN1TaggedObject

All Implemented Interfaces:

ASN1Encodable, ASN1TaggedObjectParser, InMemoryRepresentable, Encodable

Direct Known Subclasses:

BERTaggedObject, DERTaggedObject, DLTaggedObject

public abstract class ASN1TaggedObject
extends ASN1Primitive
implements ASN1TaggedObjectParser

ASN.1 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).

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ASN1TaggedObject(boolean explicit, int tagClass, int tagNo, ASN1Encodable obj)
protected	ASN1TaggedObject(boolean explicit, int tagNo, ASN1Encodable obj)	Create a tagged object with the style given by the value of explicit.

Method Summary

Modifier and Type	Method	Description
ASN1Object	getBaseObject()	Needed for open types, until we have better type-guided parsing support.
ASN1Primitive	getBaseUniversal(boolean declaredExplicit, int tagNo)	Note: tagged objects are generally context dependent.
ASN1Object	getExplicitBaseObject()	Needed for open types, until we have better type-guided parsing support.
ASN1TaggedObject	getExplicitBaseTagged()
ASN1TaggedObject	getImplicitBaseTagged(int baseTagClass, int baseTagNo)
static ASN1TaggedObject	getInstance(java.lang.Object obj)
static ASN1TaggedObject	getInstance(java.lang.Object obj, int tagClass)
static ASN1TaggedObject	getInstance(java.lang.Object obj, int tagClass, int tagNo)
static ASN1TaggedObject	getInstance(ASN1TaggedObject taggedObject, boolean declaredExplicit)
ASN1Primitive	getLoadedObject()	Get the in-memory representation of the ASN.1 object.
int	getTagClass()	Return the tag class associated with this object.
int	getTagNo()	Return the tag number associated with this object.
boolean	hasContextTag()
boolean	hasContextTag(int tagNo)
int	hashCode()
boolean	hasTag(int tagClass, int tagNo)
boolean	hasTagClass(int tagClass)
boolean	isExplicit()	return whether or not the object may be explicitly tagged.
ASN1Encodable	parseBaseUniversal(boolean declaredExplicit, int baseTagNo)
ASN1Encodable	parseExplicitBaseObject()	Needed for open types, until we have better type-guided parsing support.
ASN1TaggedObjectParser	parseExplicitBaseTagged()
ASN1TaggedObjectParser	parseImplicitBaseTagged(int baseTagClass, int baseTagNo)
java.lang.String	toString()

Methods inherited from class org.bouncycastle.asn1.ASN1Primitive

encodeTo, encodeTo, equals, equals, equals, fromByteArray, toASN1Primitive

Methods inherited from class org.bouncycastle.asn1.ASN1Object

getEncoded, getEncoded, hasEncodedTagValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.bouncycastle.asn1.ASN1Encodable

toASN1Primitive

Constructor Detail

ASN1TaggedObject

protected ASN1TaggedObject(boolean explicit,
                           int tagNo,
                           ASN1Encodable obj)

Create a tagged object with the style given by the value of explicit.

If the object implements ASN1Choice the tag style will always be changed to explicit in accordance with the ASN.1 encoding rules.

Parameters:

explicit - true if the object is explicitly tagged.

tagNo - the tag number for this object.

obj - the tagged object.

ASN1TaggedObject

protected ASN1TaggedObject(boolean explicit,
                           int tagClass,
                           int tagNo,
                           ASN1Encodable obj)

Method Detail

getInstance

public static ASN1TaggedObject getInstance(java.lang.Object obj)

getInstance

public static ASN1TaggedObject getInstance(java.lang.Object obj,
                                           int tagClass)

getInstance

public static ASN1TaggedObject getInstance(java.lang.Object obj,
                                           int tagClass,
                                           int tagNo)

getInstance

public static ASN1TaggedObject getInstance(ASN1TaggedObject taggedObject,
                                           boolean declaredExplicit)

hashCode

public int hashCode()

Specified by:

hashCode in class ASN1Primitive

getTagClass

public int getTagClass()

Description copied from interface: ASN1TaggedObjectParser

Return the tag class associated with this object.

Specified by:

getTagClass in interface ASN1TaggedObjectParser

Returns:

the tag class.

getTagNo

public int getTagNo()

Return the tag number associated with this object.

Specified by:

getTagNo in interface ASN1TaggedObjectParser

Returns:

the tag number.

hasContextTag

public boolean hasContextTag()

Specified by:

hasContextTag in interface ASN1TaggedObjectParser

hasContextTag

public boolean hasContextTag(int tagNo)

Specified by:

hasContextTag in interface ASN1TaggedObjectParser

hasTag

public boolean hasTag(int tagClass,
                      int tagNo)

Specified by:

hasTag in interface ASN1TaggedObjectParser

hasTagClass

public boolean hasTagClass(int tagClass)

Specified by:

hasTagClass in interface ASN1TaggedObjectParser

isExplicit

public boolean isExplicit()

return whether or not the object may be explicitly tagged.

Note: if the object has been read from an input stream, the only time you can be sure if isExplicit is returning the true state of affairs is if it returns false. An implicitly tagged object may appear to be explicitly tagged, so you need to understand the context under which the reading was done as well, see getObject below.

getBaseObject

public ASN1Object getBaseObject()

Needed for open types, until we have better type-guided parsing support. Use sparingly for other purposes, and prefer getExplicitBaseTagged(), getImplicitBaseTagged(int, int) or getBaseUniversal(boolean, int) where possible. Before using, check for matching tag class and number.

getExplicitBaseObject

public ASN1Object getExplicitBaseObject()

Needed for open types, until we have better type-guided parsing support. Use sparingly for other purposes, and prefer getExplicitBaseTagged() or getBaseUniversal(boolean, int) where possible. Before using, check for matching tag class and number.

getExplicitBaseTagged

public ASN1TaggedObject getExplicitBaseTagged()

getImplicitBaseTagged

public ASN1TaggedObject getImplicitBaseTagged(int baseTagClass,
                                              int baseTagNo)

getBaseUniversal

public ASN1Primitive getBaseUniversal(boolean declaredExplicit,
                                      int tagNo)

Note: tagged objects are generally context dependent. Before trying to extract a tagged object this way, make sure you have checked that both the tag class and tag number match what you are looking for.

Parameters:

declaredExplicit - Whether the tagged type for this object was declared EXPLICIT.

tagNo - The universal tag number of the expected base object.

parseBaseUniversal

public ASN1Encodable parseBaseUniversal(boolean declaredExplicit,
                                        int baseTagNo)
                                 throws java.io.IOException

Specified by:

parseBaseUniversal in interface ASN1TaggedObjectParser

Throws:

java.io.IOException

parseExplicitBaseObject

public ASN1Encodable parseExplicitBaseObject()
                                      throws java.io.IOException

Description copied from interface: ASN1TaggedObjectParser

Needed for open types, until we have better type-guided parsing support. Use sparingly for other purposes, and prefer ASN1TaggedObjectParser.parseExplicitBaseTagged() or ASN1TaggedObjectParser.parseBaseUniversal(boolean, int) where possible. Before using, check for matching tag class and number.

Specified by:

parseExplicitBaseObject in interface ASN1TaggedObjectParser

Throws:

java.io.IOException

parseExplicitBaseTagged

public ASN1TaggedObjectParser parseExplicitBaseTagged()
                                               throws java.io.IOException

Specified by:

parseExplicitBaseTagged in interface ASN1TaggedObjectParser

Throws:

java.io.IOException

parseImplicitBaseTagged

public ASN1TaggedObjectParser parseImplicitBaseTagged(int baseTagClass,
                                                      int baseTagNo)
                                               throws java.io.IOException

Specified by:

parseImplicitBaseTagged in interface ASN1TaggedObjectParser

Throws:

java.io.IOException

getLoadedObject

public final ASN1Primitive getLoadedObject()

Description copied from interface: InMemoryRepresentable

Get the in-memory representation of the ASN.1 object.

Specified by:

getLoadedObject in interface InMemoryRepresentable

Returns:

an ASN1Primitive representing the loaded object.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object