reuse existing crypto context for subsequent volumes

diff --git a/deltatar/tarfile.py b/deltatar/tarfile.py
index bdb40b1..b63b593 100644 (file)
--- a/deltatar/tarfile.py
+++ b/deltatar/tarfile.py
@@ -2654,7 +2654,7 @@ class TarFile(object):
                             comptype=self.fileobj.comptype,
                             fileobj=None,
                             bufsize=self.fileobj.bufsize,
-                            encryption=encryption,
+                            encryption=encryption or self.fileobj.encryption,
                             concat=self.fileobj.arcmode & ARCMODE_CONCAT)
             else:
                 # here, we lose information about compression/encryption!