IT. Expert System.

All Implemented Interfaces:

ASN1Constants

Direct Known Subclasses:

ASN1Any, ASN1Choice, ASN1Constructed, ASN1Implicit, ASN1Primitive, ASN1StringType

public abstract class ASN1Type
extends Object
implements ASN1Constants

See Also:

ASN.1

• Field Summary

  Fields

  Modifier and Type	Field and Description
  int	constrId Integer representation of constructed identifier.
  int	id Integer representation of primitive identifier.

  • Fields inherited from interface org.apache.harmony.security.asn1.ASN1Constants

    CLASS_APPLICATION, CLASS_CONTEXTSPECIFIC, CLASS_PRIVATE, CLASS_UNIVERSAL, PC_CONSTRUCTED, PC_PRIMITIVE, TAG_ANY, TAG_BITSTRING, TAG_BMPSTRING, TAG_BOOLEAN, TAG_C_BITSTRING, TAG_C_GENERALIZEDTIME, TAG_C_OCTETSTRING, TAG_C_SEQUENCE, TAG_C_SEQUENCEOF, TAG_C_SET, TAG_C_SETOF, TAG_C_UTCTIME, TAG_C_UTF8STRING, TAG_CHOICE, TAG_EMBEDDEDPDV, TAG_ENUM, TAG_EXTERNAL, TAG_GENERALIZEDTIME, TAG_GENERALSTRING, TAG_GRAPHICSTRING, TAG_IA5STRING, TAG_INSTANCEOF, TAG_INTEGER, TAG_ISO646STRING, TAG_NULL, TAG_NUMERICSTRING, TAG_OBJDESCRIPTOR, TAG_OCTETSTRING, TAG_OID, TAG_PRINTABLESTRING, TAG_REAL, TAG_RELATIVEOID, TAG_SEQUENCE, TAG_SEQUENCEOF, TAG_SET, TAG_SETOF, TAG_T61STRING, TAG_TELETEXSTRING, TAG_UNIVERSALSTRING, TAG_UTCTIME, TAG_UTF8STRING, TAG_VIDEOTEXSTRING, TAG_VISIBLESTRING

• Constructor Summary

  Constructors

  Constructor and Description
  ASN1Type(int tagNumber) Constructs a primitive, universal ASN.1 type.
  ASN1Type(int tagClass, int tagNumber) Constructs an ASN.1 type.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  abstract boolean	checkTag(int identifier) Tests provided identifier.
  abstract Object	decode(BerInputStream in) Decodes ASN.1 type.
  Object	decode(byte[] encoded)
  Object	decode(byte[] encoded, int offset, int encodingLen)
  Object	decode(InputStream in)
  byte[]	encode(Object object)
  abstract void	encodeASN(BerOutputStream out) Encodes ASN.1 type.
  abstract void	encodeContent(BerOutputStream out)
  protected Object	getDecodedObject(BerInputStream in) Creates decoded object.
  int	getEncodedLength(BerOutputStream out)
  abstract void	setEncodingContent(BerOutputStream out)
  String	toString() Returns a string containing a concise, human-readable description of this object.
  void	verify(byte[] encoded)
  void	verify(InputStream in)

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

• Field Detail

  • id

    public final int id

    Integer representation of primitive identifier.

  • constrId

    public final int constrId

    Integer representation of constructed identifier.

• Constructor Detail

  • ASN1Type

    public ASN1Type(int tagNumber)

    Constructs a primitive, universal ASN.1 type.

    Parameters:

    tagNumber - - ASN.1 tag number

    Throws:

    IllegalArgumentException - - if tagNumber is invalid

  • ASN1Type

    public ASN1Type(int tagClass,
            int tagNumber)

    Constructs an ASN.1 type.

    Parameters:

    tagClass - - tag class. MUST be CLASS_UNIVERSAL, CLASS_APPLICATION, CLASS_CONTEXTSPECIFIC, CLASS_PRIVATE

    tagNumber - - ASN.1 tag number.

    Throws:

    IllegalArgumentException - - if tagClass or tagNumber is invalid

• Method Detail

  • decode

    public final Object decode(byte[] encoded)
                        throws IOException

    Throws:

    IOException

  • decode

    public final Object decode(byte[] encoded,
                int offset,
                int encodingLen)
                        throws IOException

    Throws:

    IOException

  • decode

    public final Object decode(InputStream in)
                        throws IOException

    Throws:

    IOException

  • verify

    public final void verify(byte[] encoded)
                      throws IOException

    Throws:

    IOException

  • verify

    public final void verify(InputStream in)
                      throws IOException

    Throws:

    IOException

  • encode

    public final byte[] encode(Object object)

  • decode

    public abstract Object decode(BerInputStream in)
                           throws IOException

    Decodes ASN.1 type.

    Throws:

    IOException - if an I/O error occurs or the end of the stream is reached

  • checkTag

    public abstract boolean checkTag(int identifier)

    Tests provided identifier.

    Parameters:

    identifier - identifier to be verified

    Returns:

    true if identifier is associated with this ASN.1 type

  • getDecodedObject

    protected Object getDecodedObject(BerInputStream in)
                               throws IOException

    Creates decoded object. Derived classes should override this method to provide creation for a selected class of objects during decoding. The default implementation returns an object created by decoding stream.

    Throws:

    IOException

  • encodeASN

    public abstract void encodeASN(BerOutputStream out)

    Encodes ASN.1 type.

  • encodeContent

    public abstract void encodeContent(BerOutputStream out)

  • setEncodingContent

    public abstract void setEncodingContent(BerOutputStream out)

  • getEncodedLength

    public int getEncodedLength(BerOutputStream out)

  • toString

    public String toString()

    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

       getClass().getName() + '@' + Integer.toHexString(hashCode())

    See Writing a useful toString method if you intend implementing your own toString method.

    Overrides:

    toString in class Object

    Returns:

    a printable representation of this object.