org.bouncycastle.cms.KeyTransRecipientInformation Maven / Gradle / Ivy
package org.bouncycastle.cms;
import java.io.IOException;
import java.security.Key;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.Provider;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.cms.IssuerAndSerialNumber;
import org.bouncycastle.asn1.cms.KeyTransRecipientInfo;
import org.bouncycastle.asn1.cms.RecipientIdentifier;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.cms.jcajce.JceKeyTransAuthenticatedRecipient;
import org.bouncycastle.cms.jcajce.JceKeyTransEnvelopedRecipient;
import org.bouncycastle.cms.jcajce.JceKeyTransRecipient;
/**
* the KeyTransRecipientInformation class for a recipient who has been sent a secret
* key encrypted using their public key that needs to be used to
* extract the message.
*/
public class KeyTransRecipientInformation
extends RecipientInformation
{
private KeyTransRecipientInfo info;
KeyTransRecipientInformation(
KeyTransRecipientInfo info,
AlgorithmIdentifier messageAlgorithm,
CMSSecureReadable secureReadable,
AuthAttributesProvider additionalData)
{
super(info.getKeyEncryptionAlgorithm(), messageAlgorithm, secureReadable, additionalData);
this.info = info;
RecipientIdentifier r = info.getRecipientIdentifier();
if (r.isTagged())
{
ASN1OctetString octs = ASN1OctetString.getInstance(r.getId());
rid = new KeyTransRecipientId(octs.getOctets());
}
else
{
IssuerAndSerialNumber iAnds = IssuerAndSerialNumber.getInstance(r.getId());
rid = new KeyTransRecipientId(iAnds.getName(), iAnds.getSerialNumber().getValue());
}
}
/**
* decrypt the content and return it
* @deprecated use getContentStream(Recipient) method
*/
public CMSTypedStream getContentStream(
Key key,
String prov)
throws CMSException, NoSuchProviderException
{
return getContentStream(key, CMSUtils.getProvider(prov));
}
/**
* decrypt the content and return it
* @deprecated use getContentStream(Recipient) method
*/
public CMSTypedStream getContentStream(
Key key,
Provider prov)
throws CMSException
{
try
{
JceKeyTransRecipient recipient;
if (secureReadable instanceof CMSEnvelopedHelper.CMSEnvelopedSecureReadable)
{
recipient = new JceKeyTransEnvelopedRecipient((PrivateKey)key);
}
else
{
recipient = new JceKeyTransAuthenticatedRecipient((PrivateKey)key);
}
if (prov != null)
{
recipient.setProvider(prov);
if (prov.getName().equalsIgnoreCase("SunJCE"))
{
recipient.setContentProvider((String)null); // need to fall back to generic search
}
}
return getContentStream(recipient);
}
catch (IOException e)
{
throw new CMSException("encoding error: " + e.getMessage(), e);
}
}
protected RecipientOperator getRecipientOperator(Recipient recipient)
throws CMSException
{
return ((KeyTransRecipient)recipient).getRecipientOperator(keyEncAlg, messageAlgorithm, info.getEncryptedKey().getOctets());
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy