Package org.bouncycastle.cms.bc

Class BcPasswordRecipient

java.lang.Object

org.bouncycastle.cms.AbstractRecipient

org.bouncycastle.cms.bc.BcPasswordRecipient

All Implemented Interfaces:

PasswordRecipient, Recipient

Direct Known Subclasses:

BcPasswordEnvelopedRecipient

public abstract class BcPasswordRecipient
extends AbstractRecipient
implements PasswordRecipient

the RecipientInfo class for a recipient who has been sent a message encrypted using a password.

Nested Class Summary

Nested classes/interfaces inherited from interface org.bouncycastle.cms.PasswordRecipient

PasswordRecipient.PRF

Field Summary

Fields inherited from interface org.bouncycastle.cms.PasswordRecipient

PKCS5_SCHEME2, PKCS5_SCHEME2_UTF8

Method Summary

Modifier and Type	Method	Description
byte[]	calculateDerivedKey(int schemeID, org.bouncycastle.asn1.x509.AlgorithmIdentifier derivationAlgorithm, int keySize)
protected org.bouncycastle.crypto.params.KeyParameter	extractSecretKey(org.bouncycastle.asn1.x509.AlgorithmIdentifier keyEncryptionAlgorithm, org.bouncycastle.asn1.x509.AlgorithmIdentifier contentEncryptionAlgorithm, byte[] derivedKey, byte[] encryptedContentEncryptionKey)
char[]	getPassword()
int	getPasswordConversionScheme()
BcPasswordRecipient	setAllowedContentAlgorithms(java.util.Set<org.bouncycastle.asn1.ASN1ObjectIdentifier> allowedContentAlgorithms)	Set the content-encryption algorithms this recipient is willing to unwrap a key for.
BcPasswordRecipient	setPasswordConversionScheme(int schemeID)

Methods inherited from class org.bouncycastle.cms.AbstractRecipient

checkTagSize, isContentAlgorithmAllowed, setAllowedContentAlgorithmSet, setMinimumTagSizeInBits

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bouncycastle.cms.PasswordRecipient

getRecipientOperator

Method Detail

setPasswordConversionScheme

public BcPasswordRecipient setPasswordConversionScheme(int schemeID)

setAllowedContentAlgorithms

public BcPasswordRecipient setAllowedContentAlgorithms(java.util.Set<org.bouncycastle.asn1.ASN1ObjectIdentifier> allowedContentAlgorithms)

Set the content-encryption algorithms this recipient is willing to unwrap a key for. When set, an attempt to recover content protected under any other algorithm is rejected, mitigating an attacker substituting a weaker content-encryption algorithm into the recipient info.

Parameters:

allowedContentAlgorithms - the set of permitted content-encryption algorithm OIDs.

Returns:

this recipient.

extractSecretKey

protected org.bouncycastle.crypto.params.KeyParameter extractSecretKey(org.bouncycastle.asn1.x509.AlgorithmIdentifier keyEncryptionAlgorithm,
                                                                       org.bouncycastle.asn1.x509.AlgorithmIdentifier contentEncryptionAlgorithm,
                                                                       byte[] derivedKey,
                                                                       byte[] encryptedContentEncryptionKey)
                                                                throws CMSException

Throws:

CMSException

calculateDerivedKey

public byte[] calculateDerivedKey(int schemeID,
                                  org.bouncycastle.asn1.x509.AlgorithmIdentifier derivationAlgorithm,
                                  int keySize)
                           throws CMSException

Specified by:

calculateDerivedKey in interface PasswordRecipient

Throws:

CMSException

getPasswordConversionScheme

public int getPasswordConversionScheme()

Specified by:

getPasswordConversionScheme in interface PasswordRecipient

getPassword

public char[] getPassword()

Specified by:

getPassword in interface PasswordRecipient