org.bouncycastle.cms.jcajce.JceKeyAgreeEnvelopedRecipient Maven / Gradle / Ivy
package org.bouncycastle.cms.jcajce;
import java.io.InputStream;
import java.security.Key;
import java.security.PrivateKey;
import javax.crypto.Cipher;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.RecipientOperator;
import org.bouncycastle.jcajce.io.CipherInputStream;
import org.bouncycastle.operator.InputDecryptor;
public class JceKeyAgreeEnvelopedRecipient
extends JceKeyAgreeRecipient
{
public JceKeyAgreeEnvelopedRecipient(PrivateKey recipientKey)
{
super(recipientKey);
}
public RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentEncryptionAlgorithm, SubjectPublicKeyInfo senderPublicKey, ASN1OctetString userKeyingMaterial, byte[] encryptedContentKey)
throws CMSException
{
Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentEncryptionAlgorithm, senderPublicKey, userKeyingMaterial, encryptedContentKey);
final Cipher dataCipher = contentHelper.createContentCipher(secretKey, contentEncryptionAlgorithm);
return new RecipientOperator(new InputDecryptor()
{
public AlgorithmIdentifier getAlgorithmIdentifier()
{
return contentEncryptionAlgorithm;
}
public InputStream getInputStream(InputStream dataOut)
{
return new CipherInputStream(dataOut, dataCipher);
}
});
}
}