oracle.security.crypto.cms
Class CMSEnvelopedDataOutputStream

java.lang.Object
java.io.OutputStream
java.io.FilterOutputStream
oracle.security.crypto.cms.CMSOutputStream
oracle.security.crypto.cms.CMSEnvelopedDataOutputStream

public class CMSEnvelopedDataOutputStream

extends CMSOutputStream

A CMSEnvelopedDataOutputStream writes its output in the form of a CMS enveloped-data structure, enveloping the data in the process.

Specifically, the effect of using this class is as if the following process took place:

• All of the data written to this stream is accumulated into a EncryptedContentInfo structure of the specified content-type.
• The resulting EncryptedContentInfo structure is then provided as the input to a ContentInfo structure of type enveloped-data.
• A BER encoding of the resulting ContentInfo structure is written to the underlying output stream;

except that the actual process is done in one pass, eliminating the necessity to accumulate all of the input data before writing any output.

In the case where a <ocde>CMSConnector is provided instead of a CMSOutputStream, only the exposed content i.e. the Content field of the ContentInfo structure minus the explicit [0] tag is written to the underlying output stream.

IMPORTANT: This class generates large CMS enveloped-data Objects more efficiently (Java VM memory usage) than the CMSEnvelopedDataContentInfo class.

See Also:

CMSOutputStream, CMSEnvelopedDataContentInfo, CMSEnvelopedDataOutputConnector

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

CMSEnvelopedDataOutputStream(CMSOutputConnector conn, ASN1ObjectID enclosedContentType, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients, boolean writeContent)
Creates a CMSEnvelopedDataOutputStream.

CMSEnvelopedDataOutputStream(CMSOutputConnector conn, ASN1ObjectID enclosedContentType, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients, boolean writeContent, OriginatorInfo origInfo, oracle.security.crypto.cert.AttributeSet unprotectedAttribs)
Creates a CMSEnvelopedDataOutputStream.

CMSEnvelopedDataOutputStream(java.io.OutputStream out, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients)
Creates a CMSEnvelopedDataOutputStream.

CMSEnvelopedDataOutputStream(java.io.OutputStream out, ASN1ObjectID enclosedContentType, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients)
Creates a CMSEnvelopedDataOutputStream.

CMSEnvelopedDataOutputStream(java.io.OutputStream out, ASN1ObjectID enclosedContentType, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients, boolean writeContent)
Creates a CMSEnvelopedDataOutputStream.

CMSEnvelopedDataOutputStream(java.io.OutputStream out, ASN1ObjectID enclosedContentType, AlgorithmIdentifier contentEncryptionAlgID, java.util.Vector recipients, boolean writeContent, OriginatorInfo origInfo, oracle.security.crypto.cert.AttributeSet unprotectedAttribs)
Creates a CMSEnvelopedDataOutputStream.

Method Summary

void	close()
ASN1ObjectID	getExposedContentType() Returns the content type of the data output to the underlying output stream.
void	terminate() Finish writing the enveloped-data structure.
void	write(byte[] b, int offset, int len)
void	write(int ch)

Methods inherited from class java.io.FilterOutputStream

flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(java.io.OutputStream out,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

The enclosed content type will be set to Data.

Parameters:

out - The output stream.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipients (each element must be an instance of CMSRecipientInfoSpec).

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(java.io.OutputStream out,
                                    ASN1ObjectID enclosedContentType,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

Parameters:

out - The output stream.

enclosedContentType - The content type of content being encrypted.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipients (each element must be an instance of CMSRecipientInfoSpec).

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(java.io.OutputStream out,
                                    ASN1ObjectID enclosedContentType,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients,
                                    boolean writeContent)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

Parameters:

out - The output stream.

enclosedContentType - The content type of content being encrypted.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipients (each element must be an instance of CMSRecipientInfoSpec).

writeContent - Indicates if enclosed content is to be written to the output stream.

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(java.io.OutputStream out,
                                    ASN1ObjectID enclosedContentType,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients,
                                    boolean writeContent,
                                    OriginatorInfo origInfo,
                                    oracle.security.crypto.cert.AttributeSet unprotectedAttribs)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

Parameters:

out - The output stream.

enclosedContentType - The content type of content being encrypted.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipients (each element must be an instance of CMSRecipientInfoSpec).

writeContent - Indicates if enclosed content is to be written to the output stream.

origInfo - The OriginatorInfo.

unprotectedAttribs - The unprotected attributes.

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(CMSOutputConnector conn,
                                    ASN1ObjectID enclosedContentType,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients,
                                    boolean writeContent)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

Parameters:

conn - The output connector.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipient certificates (each element must be an instance of CMSRecipientInfoSpec).

writeContent - Indicates if enclosed content is to be written to the output stream.

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

CMSEnvelopedDataOutputStream

public CMSEnvelopedDataOutputStream(CMSOutputConnector conn,
                                    ASN1ObjectID enclosedContentType,
                                    AlgorithmIdentifier contentEncryptionAlgID,
                                    java.util.Vector recipients,
                                    boolean writeContent,
                                    OriginatorInfo origInfo,
                                    oracle.security.crypto.cert.AttributeSet unprotectedAttribs)
                             throws AlgorithmIdentifierException

Creates a CMSEnvelopedDataOutputStream.

Parameters:

conn - The output connector.

enclosedContentType - The content type of content being encrypted.

contentEncryptionAlgID - The content encryption algorithm.

recipients - The recipients (each element must be an instance of CMSRecipientInfoSpec).

writeContent - Indicates if enclosed content is to be written to the output stream.

origInfo - The OriginatorInfo.

unprotectedAttribs - The set of unprotected attributes.

Throws:

AlgorithmIdentifierException - Unrecognized encryption algorithm.

Method Detail

terminate

public void terminate()
               throws java.io.IOException

Finish writing the enveloped-data structure.

This must be called only after all the enclosed data has been written to the output stream.

Specified by:

terminate in class CMSOutputStream

Throws:

java.io.IOException - An I/O error occurs.

write

public void write(int ch)
           throws java.io.IOException

Throws:

java.io.IOException

write

public void write(byte[] b,
                  int offset,
                  int len)
           throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

getExposedContentType

public ASN1ObjectID getExposedContentType()

Returns the content type of the data output to the underlying output stream.

Specified by:

getExposedContentType in class CMSOutputStream

Returns:

The content type identifier.