1 files changed, 19 insertions, 3 deletions
diff --git a/src/mailman_pgp/model/fs_key.py b/src/mailman_pgp/model/fs_key.py
index c4a2ac4..118f971 100644
--- a/src/mailman_pgp/model/fs_key.py
+++ b/src/mailman_pgp/model/fs_key.py
@@ -16,14 +16,15 @@
 # this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """Filesystem stored PGP key."""
-from os import remove
-from os.path import getmtime, join
+from os import remove, urandom
+from os.path import getmtime, getsize, join
 
 from public import public
 
 from mailman_pgp.utils.file import locked_obj
 from mailman_pgp.utils.pgp import key_from_file
 
+
 @public
 class FSKey:
     """Filesystem stored PGP key."""
@@ -94,4 +95,19 @@ class FSKey:
 
     @locked_obj('lock_path')
     def delete(self):
-        remove(self.key_path)
+        try:
+            remove(self.key_path)
+        except FileNotFoundError:
+            pass
+
+    @locked_obj('lock_path')
+    def shred(self):
+        try:
+            size = getsize(self.key_path)
+            for _ in range(10):
+                with open(self.key_path, 'wb') as f:
+                    data = urandom(size)
+                    f.write(data)
+            remove(self.key_path)
+        except FileNotFoundError:
+            pass