1 files changed, 12 insertions, 4 deletions

diff --git a/src/mailman_pgp/pgp/mime.py b/src/mailman_pgp/pgp/mime.py
index bdb7943..33ec93e 100644
--- a/src/mailman_pgp/pgp/mime.py
+++ b/src/mailman_pgp/pgp/mime.py
@@ -24,7 +24,7 @@ from email.mime.application import MIMEApplication
 from email.utils import collapse_rfc2231_value
 
 from mailman.email.message import Message, MultipartDigestMessage
-from pgpy import PGPKey, PGPMessage, PGPSignature
+from pgpy import PGPDetachedSignature, PGPKey, PGPMessage
 from pgpy.constants import HashAlgorithm, SymmetricKeyAlgorithm
 from public import public
 
@@ -98,13 +98,14 @@ class MIMEWrapper:
         """
 
         :return:
-        :rtype: typing.Generator[pgpy.PGPSignature]
+        :rtype: typing.Generator[pgpy.PGPDetachedSignature]
         """
         try:
-            msg = PGPSignature.from_blob(self.msg.get_payload(1).get_payload())
+            sig = PGPDetachedSignature.from_blob(
+                    self.msg.get_payload(1).get_payload())
         except:
             return
-        yield msg
+        yield sig
 
     def is_encrypted(self):
         """
@@ -229,6 +230,13 @@ class MIMEWrapper:
         return 'pgp-' + algs[hash_algo]
 
     def _wrap_signed(self, msg, signature):
+        """
+        As per RFC1847 and RFC3156.
+
+        :param msg:
+        :param signature:
+        :return:
+        """
         micalg = self._micalg(signature.hash_algorithm)
         out = MultipartDigestMessage('signed', micalg=micalg,
                                      protocol=MIMEWrapper._signed_type)