Package org.bouncycastle.asn1

Class ASN1BitString

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.ASN1Primitive

org.bouncycastle.asn1.ASN1BitString

All Implemented Interfaces:

ASN1BitStringParser, ASN1Encodable, ASN1String, InMemoryRepresentable, Encodable

Direct Known Subclasses:

BERBitString, DERBitString, DLBitString

public abstract class ASN1BitString
extends ASN1Primitive
implements ASN1String, ASN1BitStringParser

Base class for BIT STRING objects

Method Summary

Modifier and Type	Method	Description
java.io.InputStream	getBitStream()	Return an InputStream representing the contents of the BIT STRING.
byte[]	getBytes()
protected static byte[]	getBytes(int bitString)
static ASN1BitString	getInstance(java.lang.Object obj)
static ASN1BitString	getInstance(ASN1TaggedObject taggedObject, boolean explicit)
ASN1Primitive	getLoadedObject()	Get the in-memory representation of the ASN.1 object.
byte[]	getOctets()	Return the octets contained in this BIT STRING, checking that this BIT STRING really does represent an octet aligned string.
java.io.InputStream	getOctetStream()	Return an InputStream representing the contents of the BIT STRING, where the content is expected to be octet-aligned (this will be automatically checked during parsing).
int	getPadBits()	Return the number of pad bits, if any, in the final byte, if any, read from ASN1BitStringParser.getBitStream().
protected static int	getPadBits(int bitString)
java.lang.String	getString()	Return a String representation of this BIT STRING
int	hashCode()
int	intValue()
ASN1BitStringParser	parser()
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

Method Detail

getInstance

public static ASN1BitString getInstance(java.lang.Object obj)

getInstance

public static ASN1BitString getInstance(ASN1TaggedObject taggedObject,
                                        boolean explicit)

getPadBits

protected static int getPadBits(int bitString)

Parameters:

bitString - an int containing the BIT STRING

Returns:

the correct number of pad bits for a bit string defined in a 32 bit constant

getBytes

protected static byte[] getBytes(int bitString)

Parameters:

bitString - an int containing the BIT STRING

Returns:

the correct number of bytes for a bit string defined in a 32 bit constant

getBitStream

public java.io.InputStream getBitStream()
                                 throws java.io.IOException

Description copied from interface: ASN1BitStringParser

Return an InputStream representing the contents of the BIT STRING. The final byte, if any, may include pad bits. See ASN1BitStringParser.getPadBits().

Specified by:

getBitStream in interface ASN1BitStringParser

Returns:

an InputStream with its source as the BIT STRING content.

Throws:

java.io.IOException

getOctetStream

public java.io.InputStream getOctetStream()
                                   throws java.io.IOException

Description copied from interface: ASN1BitStringParser

Return an InputStream representing the contents of the BIT STRING, where the content is expected to be octet-aligned (this will be automatically checked during parsing).

Specified by:

getOctetStream in interface ASN1BitStringParser

Returns:

an InputStream with its source as the BIT STRING content.

Throws:

java.io.IOException

parser

public ASN1BitStringParser parser()

getString

public java.lang.String getString()

Return a String representation of this BIT STRING

Specified by:

getString in interface ASN1String

Returns:

a String representation.

intValue

public int intValue()

Returns:

the value of the bit string as an int (truncating if necessary)

getOctets

public byte[] getOctets()

Return the octets contained in this BIT STRING, checking that this BIT STRING really does represent an octet aligned string. Only use this method when the standard you are following dictates that the BIT STRING will be octet aligned.

Returns:

a copy of the octet aligned data.

getBytes

public byte[] getBytes()

getPadBits

public int getPadBits()

Description copied from interface: ASN1BitStringParser

Return the number of pad bits, if any, in the final byte, if any, read from ASN1BitStringParser.getBitStream(). This number is in the range zero to seven. That number of the least significant bits of the final byte, if any, are not part of the contents and should be ignored. NOTE: Must be called AFTER the stream has been fully processed. (Does not need to be called if ASN1BitStringParser.getOctetStream() was used instead of ASN1BitStringParser.getBitStream()).

Specified by:

getPadBits in interface ASN1BitStringParser

Returns:

the number of pad bits. In the range zero to seven.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in class ASN1Primitive

getLoadedObject

public 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.