CMSEnvelopedDataParser

Class Overview

Parsing class for an CMS Enveloped Data object from an input stream.

Note: that because we are in a streaming mode only one recipient can be tried and it is important that the methods on the parser are called in the appropriate order.

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

      CMSEnvelopedDataParser     ep = new CMSEnvelopedDataParser(inputStream);

      RecipientInformationStore  recipients = ep.getRecipientInfos();

      Collection  c = recipients.getRecipients();
      Iterator    it = c.iterator();
      
      if (it.hasNext())
      {
          RecipientInformation   recipient = (RecipientInformation)it.next();

          CMSTypedStream recData = recipient.getContentStream(new JceKeyTransEnvelopedRecipient(privateKey).setProvider("BC"));
          
          processDataStream(recData.getContentStream());
      }
  

Note: this class does not introduce buffering - if you are processing large files you should create the parser with:

          CMSEnvelopedDataParser     ep = new CMSEnvelopedDataParser(new BufferedInputStream(inputStream, bufSize));
  

where bufSize is a suitably large buffer size.

Summary

[Expand] Inherited Fields
From class org.bouncycastle.cms.CMSContentInfoParser protected ContentInfoParser _contentInfo protected InputStream _data

Public Constructors
	CMSEnvelopedDataParser(byte[] envelopedData)
	CMSEnvelopedDataParser(InputStream envelopedData)

Public Methods
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.
AlgorithmParameters	getEncryptionAlgorithmParameters(String provider) Return an AlgorithmParameters object giving the encryption parameters used to encrypt the message content.
AlgorithmParameters	getEncryptionAlgorithmParameters(Provider provider) Return an AlgorithmParameters object giving the encryption parameters used to encrypt the message content.
RecipientInformationStore	getRecipientInfos() return a store of the intended recipients for this message
AttributeTable	getUnprotectedAttributes() return a table of the unprotected attributes indexed by the OID of the attribute.

[Expand] Inherited Methods
From class org.bouncycastle.cms.CMSContentInfoParser void close() Close the underlying data stream.
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait() final void wait(long arg0, int arg1) final void wait(long arg0)