org.spongycastle.cms

Class RecipientInformation

java.lang.Object

org.spongycastle.cms.RecipientInformation

Direct Known Subclasses:

KEKRecipientInformation, KeyAgreeRecipientInformation, KeyTransRecipientInformation, PasswordRecipientInformation

public abstract class RecipientInformation
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected org.spongycastle.asn1.x509.AlgorithmIdentifier	keyEncAlg
protected org.spongycastle.asn1.x509.AlgorithmIdentifier	messageAlgorithm
protected RecipientId	rid
protected org.spongycastle.cms.CMSSecureReadable	secureReadable

Method Summary

Modifier and Type	Method and Description
byte[]	getContent(Recipient recipient) Return the decrypted/encapsulated content in the EnvelopedData after recovering the content encryption/MAC key using the passed in Recipient.
byte[]	getContentDigest() Return the content digest calculated during the read of the content if one has been generated.
CMSTypedStream	getContentStream(Recipient recipient) Return a CMSTypedStream representing the content in the EnvelopedData after recovering the content encryption/MAC key using the passed in Recipient.
java.lang.String	getKeyEncryptionAlgOID() return the object identifier for the key encryption algorithm.
org.spongycastle.asn1.x509.AlgorithmIdentifier	getKeyEncryptionAlgorithm() Return the key encryption algorithm details for the key in this recipient.
byte[]	getKeyEncryptionAlgParams() return the ASN.1 encoded key encryption algorithm parameters, or null if there aren't any.
byte[]	getMac() Return the MAC calculated for the recipient.
protected abstract RecipientOperator	getRecipientOperator(Recipient recipient)
RecipientId	getRID()

Methods inherited from class java.lang.Object

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

Field Detail

rid

protected RecipientId rid

keyEncAlg

protected org.spongycastle.asn1.x509.AlgorithmIdentifier keyEncAlg

messageAlgorithm

protected org.spongycastle.asn1.x509.AlgorithmIdentifier messageAlgorithm

secureReadable

protected org.spongycastle.cms.CMSSecureReadable secureReadable

Method Detail

getRID

public RecipientId getRID()

getKeyEncryptionAlgorithm

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

Return the key encryption algorithm details for the key in this recipient.

Returns:

AlgorithmIdentifier representing the key encryption algorithm.

getKeyEncryptionAlgOID

public java.lang.String getKeyEncryptionAlgOID()

return the object identifier for the key encryption algorithm.

Returns:

OID for key encryption algorithm.

getKeyEncryptionAlgParams

public byte[] getKeyEncryptionAlgParams()

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

Returns:

ASN.1 encoding of key encryption algorithm parameters.

getContentDigest

public byte[] getContentDigest()

Return the content digest calculated during the read of the content if one has been generated. This will only happen if we are dealing with authenticated data and authenticated attributes are present.

Returns:

byte array containing the digest.

getMac

public byte[] getMac()

Return the MAC calculated for the recipient. Note: this call is only meaningful once all the content has been read.

Returns:

byte array containing the mac.

getContent

public byte[] getContent(Recipient recipient)
                  throws CMSException

Return the decrypted/encapsulated content in the EnvelopedData after recovering the content encryption/MAC key using the passed in Recipient.

Parameters:

recipient - recipient object to use to recover content encryption key

Returns:

the content inside the EnvelopedData this RecipientInformation is associated with.

Throws:

CMSException - if the content-encryption/MAC key cannot be recovered.

getContentStream

public CMSTypedStream getContentStream(Recipient recipient)
                                throws CMSException,
                                       java.io.IOException

Return a CMSTypedStream representing the content in the EnvelopedData after recovering the content encryption/MAC key using the passed in Recipient.

Parameters:

recipient - recipient object to use to recover content encryption key

Returns:

the content inside the EnvelopedData this RecipientInformation is associated with.

Throws:

CMSException - if the content-encryption/MAC key cannot be recovered.

java.io.IOException

getRecipientOperator

protected abstract RecipientOperator getRecipientOperator(Recipient recipient)
                                                   throws CMSException,
                                                          java.io.IOException

Throws:

CMSException

java.io.IOException