1 files changed, 45 insertions, 0 deletions
diff --git a/bcpkix/src/main/java/org/bouncycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java b/bcpkix/src/main/java/org/bouncycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java
new file mode 100644
index 0000000..fe647d7
--- /dev/null
+++ b/bcpkix/src/main/java/org/bouncycastle/cms/jcajce/JceKeyAgreeEnvelopedRecipient.java
@@ -0,0 +1,45 @@
+package org.bouncycastle.cms.jcajce;
+
+import java.io.InputStream;
+import java.security.Key;
+import java.security.PrivateKey;
+
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+
+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.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);
+            }
+        });
+    }
+}