1 files changed, 22 insertions, 0 deletions
diff --git a/pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/OperatorHelper.java b/pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/OperatorHelper.java
index 23f065bf..3a5e90c2 100644
--- a/pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/OperatorHelper.java
+++ b/pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/OperatorHelper.java
@@ -13,6 +13,7 @@ import javax.crypto.spec.IvParameterSpec;
 import javax.crypto.spec.SecretKeySpec;
 
 import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
+import org.bouncycastle.bcpg.SymmetricKeyAlgorithmTags;
 import org.bouncycastle.jcajce.JcaJceHelper;
 import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPPublicKey;
@@ -131,6 +132,27 @@ class OperatorHelper
         }
     }
 
+    Cipher createKeyWrapper(int encAlgorithm)
+        throws PGPException
+    {
+        try
+        {
+            switch (encAlgorithm)
+            {
+            case SymmetricKeyAlgorithmTags.AES_128:
+            case SymmetricKeyAlgorithmTags.AES_192:
+            case SymmetricKeyAlgorithmTags.AES_256:
+                return helper.createCipher("AESWrap");
+            default:
+                throw new PGPException("unknown wrap algorithm: " + encAlgorithm);
+            }
+        }
+        catch (GeneralSecurityException e)
+        {
+            throw new PGPException("cannot create cipher: " + e.getMessage(), e);
+        }
+    }
+
     private Signature createSignature(String cipherName)
         throws PGPException
     {