1 files changed, 43 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyTransEnvelopedRecipient.java b/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyTransEnvelopedRecipient.java
new file mode 100644
index 00000000..8ccc6bf7
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/cms/jcajce/JceKeyTransEnvelopedRecipient.java
@@ -0,0 +1,43 @@
+package org.spongycastle.cms.jcajce;
+
+import java.io.InputStream;
+import java.security.Key;
+import java.security.PrivateKey;
+
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.cms.CMSException;
+import org.spongycastle.cms.RecipientOperator;
+import org.spongycastle.operator.InputDecryptor;
+
+public class JceKeyTransEnvelopedRecipient
+    extends JceKeyTransRecipient
+{
+    public JceKeyTransEnvelopedRecipient(PrivateKey recipientKey)
+    {
+        super(recipientKey);
+    }
+
+    public RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, final AlgorithmIdentifier contentEncryptionAlgorithm, byte[] encryptedContentEncryptionKey)
+        throws CMSException
+    {
+        Key secretKey = extractSecretKey(keyEncryptionAlgorithm, contentEncryptionAlgorithm, encryptedContentEncryptionKey);
+
+        final Cipher dataCipher = contentHelper.createContentCipher(secretKey, contentEncryptionAlgorithm);
+
+        return new RecipientOperator(new InputDecryptor()
+        {
+            public AlgorithmIdentifier getAlgorithmIdentifier()
+            {
+                return contentEncryptionAlgorithm;
+            }
+
+            public InputStream getInputStream(InputStream dataIn)
+            {
+                return new CipherInputStream(dataIn, dataCipher);
+            }
+        });
+    }
+}