iaik.smime.ess.utils
Class EnvelopedESSLayer

java.lang.Object
  iaik.smime.ess.utils.ESSLayer
      iaik.smime.ess.utils.EnvelopedESSLayer

public class EnvelopedESSLayer
extends ESSLayer

An ESS layer holding an encrypted S/MIME entity.

Field Summary

Fields inherited from class iaik.smime.ess.utils.ESSLayer

content_, dataHandler_, ENVELOPED_DATA, SIGNED_DATA, type_

Constructor Summary

EnvelopedESSLayer(EncryptedContent content)
Creates an ESSLayer for the given encrypted content.

Method Summary

EncryptedContent	expand(OriginatorInfo originator, RecipientInfo[] recipients, AlgorithmID contentEA, int cekLength) Expands this ESSLayer to create a new EncryptedContent for the recipients of the MLA owning this ESS layer.
boolean	isDecrypted() Asks whether the EncryptedContent of this layer already has been decrypted.

Methods inherited from class iaik.smime.ess.utils.ESSLayer

getContent, getDataHandler, getException, getType, setDataHandler

Methods inherited from class java.lang.Object

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

Constructor Detail

EnvelopedESSLayer

public EnvelopedESSLayer(EncryptedContent content)

Creates an ESSLayer for the given encrypted content.

Parameters:

content - the EncryptedContent for this ESSLayer

Method Detail

expand

public EncryptedContent expand(OriginatorInfo originator,
                               RecipientInfo[] recipients,
                               AlgorithmID contentEA,
                               int cekLength)
                        throws javax.mail.MessagingException,
                               java.security.NoSuchAlgorithmException

Expands this ESSLayer to create a new EncryptedContent for the recipients of the MLA owning this ESS layer.

Parameters:

originator - certificates and/or certificate revocation list information of the originator if required by the key management algorithm used

recipients - the RecipientInfos for the recipients of the mailing list

Returns:

the new, expanded EncryptedContent

Throws:

javax.mail.MessagingException - if there occurs a problem when accessing the content of the layer to be expanded

java.security.NoSuchAlgorithmException - if there requested content encryption algorithm is not supported

isDecrypted

public boolean isDecrypted()

Asks whether the EncryptedContent of this layer already has been decrypted. If the EncryptedContent of this yet has not been decrypted, an application has to take care to decrypt the symmetric key before accessing the content.

Returns:

true if the content is decrypted, false if not