Package org.bouncycastle.cert.dane

Class TruncatingDigestCalculator

java.lang.Object

org.bouncycastle.cert.dane.TruncatingDigestCalculator

All Implemented Interfaces:

DigestCalculator

public class TruncatingDigestCalculator
extends Object
implements DigestCalculator

A calculator which produces a truncated digest from a regular one, with the truncation achieved by dropping off the right most octets.

Constructor Summary

Constructors

Constructor	Description
TruncatingDigestCalculator(DigestCalculator baseCalculator)	Default constructor - truncate to 28.
TruncatingDigestCalculator(DigestCalculator baseCalculator, int length)	Constructor specifying a length.

Method Summary

Modifier and Type	Method	Description
org.bouncycastle.asn1.x509.AlgorithmIdentifier	getAlgorithmIdentifier()	Return the algorithm identifier representing the digest implemented by this calculator.
byte[]	getDigest()	Return the digest calculated on what has been written to the calculator's output stream.
OutputStream	getOutputStream()	Returns a stream that will accept data for the purpose of calculating a digest.

Methods inherited from class java.lang.Object

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

Constructor Details

TruncatingDigestCalculator

public TruncatingDigestCalculator(DigestCalculator baseCalculator)

Default constructor - truncate to 28.

Parameters:

baseCalculator - actual calculator for working out the digest.

TruncatingDigestCalculator

public TruncatingDigestCalculator(DigestCalculator baseCalculator,
 int length)

Constructor specifying a length.

Parameters:

baseCalculator - actual calculator for working out the digest.

length - length in bytes of the final result.

Method Details

getAlgorithmIdentifier

public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier()

Description copied from interface: DigestCalculator

Return the algorithm identifier representing the digest implemented by this calculator.

Specified by:

getAlgorithmIdentifier in interface DigestCalculator

Returns:

algorithm id and parameters.

getOutputStream

public OutputStream getOutputStream()

Description copied from interface: DigestCalculator

Returns a stream that will accept data for the purpose of calculating a digest. Use org.bouncycastle.util.io.TeeOutputStream if you want to accumulate the data on the fly as well.

Specified by:

getOutputStream in interface DigestCalculator

Returns:

an OutputStream

getDigest

public byte[] getDigest()

Description copied from interface: DigestCalculator

Return the digest calculated on what has been written to the calculator's output stream.

Specified by:

getDigest in interface DigestCalculator

Returns:

a digest.