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Viewing changes to src/org/bouncycastle/cms/jcajce/JceKEKEnvelopedRecipient.java

  • Committer: Brian Thomason
  • Date: 2011-12-20 17:20:32 UTC
  • Revision ID: brian.thomason@canonical.com-20111220172032-rdtm13jgdxtksacr
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src/org/bouncycastle/cms/jcajce/JceKEKEnvelopedRecipient.java
 
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package org.bouncycastle.cms.jcajce;
 
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import java.io.InputStream;
 
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import java.security.Key;
 
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import javax.crypto.Cipher;
 
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import javax.crypto.CipherInputStream;
 
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import javax.crypto.SecretKey;
 
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import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
 
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import org.bouncycastle.cms.CMSException;
 
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import org.bouncycastle.cms.RecipientOperator;
 
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import org.bouncycastle.operator.InputDecryptor;
 
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public class JceKEKEnvelopedRecipient
 
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    extends JceKEKRecipient
 
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{
 
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    public JceKEKEnvelopedRecipient(SecretKey recipientKey)
 
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    {
 
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        super(recipientKey);
 
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    }
 
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    public RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentEncryptionAlgorithm, byte[] encryptedContentEncryptionKey)
 
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        throws CMSException
 
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    {
 
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        Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentEncryptionAlgorithm, encryptedContentEncryptionKey);
 
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        final Cipher dataCipher = contentHelper.createContentCipher(secretKey, contentEncryptionAlgorithm);
 
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        return new RecipientOperator(new InputDecryptor()
 
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        {
 
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            public AlgorithmIdentifier getAlgorithmIdentifier()
 
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            {
 
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                return contentEncryptionAlgorithm;
 
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            }
 
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            public InputStream getInputStream(InputStream dataOut)
 
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            {
 
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                return new CipherInputStream(dataOut, dataCipher);
 
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            }
 
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        });
 
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    }
 
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}