org.bouncycastle.jcajce
Class ExternalPublicKey

java.lang.Object
  org.bouncycastle.jcajce.ExternalPublicKey

All Implemented Interfaces:

java.security.Key, java.security.PublicKey, java.io.Serializable

public class ExternalPublicKey

extends java.lang.Object

implements java.security.PublicKey

Wrapper class which returns an "ExternalValue" for the public key encoding. In this case the key encoding is a hash and the actual key needs to be looked up somewhere else. Useful for where the public keys are really large but it's required to keep certificates small.

See Also:

Serialized Form

Field Summary

Fields inherited from interface java.security.PublicKey

serialVersionUID

Constructor Summary

ExternalPublicKey(ExternalValue extKey)
Base constructor with ASN.1 structure.

ExternalPublicKey(GeneralName location, AlgorithmIdentifier digestAlg, byte[] digest)
Base constructor with fundamental contents.

ExternalPublicKey(java.security.PublicKey key, GeneralName location, java.security.MessageDigest digest)
Helper constructor with JCA contents.

Method Summary

java.lang.String	getAlgorithm() Return "ExternalKey"
byte[]	getEncoded() Return a SubjectPublicKeyInfo structure containing an ExternalValue encoding for the key.
java.lang.String	getFormat() Return "X.509" (DER encoded SubjectPublicKeyInfo)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExternalPublicKey

public ExternalPublicKey(GeneralName location,
                         AlgorithmIdentifier digestAlg,
                         byte[] digest)

Base constructor with fundamental contents.

Parameters:

location - location URI for the actual public key.

digestAlg - hashing algorithm used to hash the actual public key encoding.

digest - digest of the actual public key.

ExternalPublicKey

public ExternalPublicKey(java.security.PublicKey key,
                         GeneralName location,
                         java.security.MessageDigest digest)

Helper constructor with JCA contents.

Parameters:

key - the public key we are externalising.

location - location URI for the actual public key.

digest - digest to use for hashing the key.

ExternalPublicKey

public ExternalPublicKey(ExternalValue extKey)

Base constructor with ASN.1 structure.

Parameters:

extKey - structure with location, hashing algorithm and hash for the public key.

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Return "ExternalKey"

Specified by:

getAlgorithm in interface java.security.Key

Returns:

"ExternalKey"

getFormat

public java.lang.String getFormat()

Return "X.509" (DER encoded SubjectPublicKeyInfo)

Specified by:

getFormat in interface java.security.Key

Returns:

"X.509"

getEncoded

public byte[] getEncoded()

Return a SubjectPublicKeyInfo structure containing an ExternalValue encoding for the key.

Specified by:

getEncoded in interface java.security.Key

Returns:

a DER encoding of SubjectPublicKeyInfo containing an ExternalValue structure.