Package org.bouncycastle.jcajce

Class ExternalPublicKey

java.lang.Object

org.bouncycastle.jcajce.ExternalPublicKey

All Implemented Interfaces:

Serializable, Key, PublicKey

public class ExternalPublicKey
extends Object
implements 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

Constructors

Constructor	Description
ExternalPublicKey(PublicKey key, GeneralName location, MessageDigest digest)	Helper constructor with JCA contents.
ExternalPublicKey(ExternalValue extKey)	Base constructor with ASN.1 structure.
ExternalPublicKey(GeneralName location, AlgorithmIdentifier digestAlg, byte[] digest)	Base constructor with fundamental contents.

Method Summary

Modifier and Type	Method	Description
String	getAlgorithm()	Return "ExternalKey"
byte[]	getEncoded()	Return a SubjectPublicKeyInfo structure containing an ExternalValue encoding for the key.
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 Details

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(PublicKey key,
 GeneralName location,
 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 Details

getAlgorithm

public String getAlgorithm()

Return "ExternalKey"

Specified by:

getAlgorithm in interface Key

Returns:

"ExternalKey"

getFormat

public String getFormat()

Return "X.509" (DER encoded SubjectPublicKeyInfo)

Specified by:

getFormat in interface Key

Returns:

"X.509"

getEncoded

public byte[] getEncoded()

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

Specified by:

getEncoded in interface Key

Returns:

a DER encoding of SubjectPublicKeyInfo containing an ExternalValue structure.