org.bouncycastle.cert.dane
Class TruncatingDigestCalculator

java.lang.Object
  org.bouncycastle.cert.dane.TruncatingDigestCalculator

All Implemented Interfaces:

DigestCalculator

public class TruncatingDigestCalculator

extends java.lang.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.

Field Summary

Fields inherited from interface org.bouncycastle.operator.DigestCalculator

SHA_256, SHA_512

Constructor Summary

TruncatingDigestCalculator(DigestCalculator baseCalculator)
Default constructor - truncate to 28.

TruncatingDigestCalculator(DigestCalculator baseCalculator, int length)
Constructor specifying a length.

Method Summary

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.
java.io.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 Detail

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 Detail

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 java.io.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.