org.spongycastle.cms

Class CMSEnvelopedData

java.lang.Object

org.spongycastle.cms.CMSEnvelopedData

All Implemented Interfaces:

org.spongycastle.util.Encodable

public class CMSEnvelopedData
extends java.lang.Object
implements org.spongycastle.util.Encodable

containing class for an CMS Enveloped Data object

Example of use - assuming the first recipient matches the private key we have.

      CMSEnvelopedData     ed = new CMSEnvelopedData(inputStream);

      RecipientInformationStore  recipients = ed.getRecipientInfos();

      Collection  c = recipients.getRecipients();
      Iterator    it = c.iterator();

      if (it.hasNext())
      {
          RecipientInformation   recipient = (RecipientInformation)it.next();

          byte[] recData = recipient.getContent(new JceKeyTransEnvelopedRecipient(privateKey).setProvider("SC"));

          processData(recData);
      }
  

Constructor Summary

Constructors

Constructor and Description
CMSEnvelopedData(byte[] envelopedData)
CMSEnvelopedData(org.spongycastle.asn1.cms.ContentInfo contentInfo) Construct a CMSEnvelopedData object from a content info object.
CMSEnvelopedData(java.io.InputStream envelopedData)

Method Summary

Modifier and Type	Method and Description
org.spongycastle.asn1.x509.AlgorithmIdentifier	getContentEncryptionAlgorithm() Return the content encryption algorithm details for the data in this object.
byte[]	getEncoded() return the ASN.1 encoded representation of this object.
java.lang.String	getEncryptionAlgOID() return the object identifier for the content encryption algorithm.
byte[]	getEncryptionAlgParams() return the ASN.1 encoded encryption algorithm parameters, or null if there aren't any.
OriginatorInformation	getOriginatorInfo() Return the originator information associated with this message if present.
RecipientInformationStore	getRecipientInfos() return a store of the intended recipients for this message
org.spongycastle.asn1.cms.AttributeTable	getUnprotectedAttributes() return a table of the unprotected attributes indexed by the OID of the attribute.
org.spongycastle.asn1.cms.ContentInfo	toASN1Structure() return the ContentInfo

Methods inherited from class java.lang.Object

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

Constructor Detail

CMSEnvelopedData

public CMSEnvelopedData(byte[] envelopedData)
                 throws CMSException

Throws:

CMSException

CMSEnvelopedData

public CMSEnvelopedData(java.io.InputStream envelopedData)
                 throws CMSException

Throws:

CMSException

CMSEnvelopedData

public CMSEnvelopedData(org.spongycastle.asn1.cms.ContentInfo contentInfo)
                 throws CMSException

Construct a CMSEnvelopedData object from a content info object.

Parameters:

contentInfo - the contentInfo containing the CMS EnvelopedData object.

Throws:

CMSException - in the case where malformed content is encountered.

Method Detail

getOriginatorInfo

public OriginatorInformation getOriginatorInfo()

Return the originator information associated with this message if present.

Returns:

OriginatorInformation, null if not present.

getContentEncryptionAlgorithm

public org.spongycastle.asn1.x509.AlgorithmIdentifier getContentEncryptionAlgorithm()

Return the content encryption algorithm details for the data in this object.

Returns:

AlgorithmIdentifier representing the content encryption algorithm.

getEncryptionAlgOID

public java.lang.String getEncryptionAlgOID()

return the object identifier for the content encryption algorithm.

getEncryptionAlgParams

public byte[] getEncryptionAlgParams()

return the ASN.1 encoded encryption algorithm parameters, or null if there aren't any.

getRecipientInfos

public RecipientInformationStore getRecipientInfos()

return a store of the intended recipients for this message

toASN1Structure

public org.spongycastle.asn1.cms.ContentInfo toASN1Structure()

return the ContentInfo

getUnprotectedAttributes

public org.spongycastle.asn1.cms.AttributeTable getUnprotectedAttributes()

return a table of the unprotected attributes indexed by the OID of the attribute.

getEncoded

public byte[] getEncoded()
                  throws java.io.IOException

return the ASN.1 encoded representation of this object.

Specified by:

getEncoded in interface org.spongycastle.util.Encodable

Throws:

java.io.IOException