1 files changed, 25 insertions, 1 deletions

diff --git a/src/mailman_pgp/commands/eml_key.py b/src/mailman_pgp/commands/eml_key.py
index a2fb4d5..9df6065 100644
--- a/src/mailman_pgp/commands/eml_key.py
+++ b/src/mailman_pgp/commands/eml_key.py
@@ -30,6 +30,7 @@ from mailman_pgp.model.address import PGPAddress
 from mailman_pgp.model.list import PGPMailingList
 from mailman_pgp.pgp.wrapper import PGPWrapper
 from mailman_pgp.workflows.base import CONFIRM_REQUEST
+from mailman_pgp.workflows.key_change import KeyChangeWorkflow
 
 
 def _get_email(msg):
@@ -130,7 +131,30 @@ def _cmd_confirm(pgp_list, mlist, msg, msgdata, arguments, results):
 def _cmd_change(pgp_list, mlist, msg, msgdata, arguments, results):
     # New public key in attachment, requires to be signed with current
     # key
-    pass
+    wrapped = PGPWrapper(msg)
+    if not wrapped.has_keys():
+        print('No keys attached? Send a key.', file=results)
+        return ContinueProcessing.no
+
+    keys = list(wrapped.keys())
+    if len(keys) != 1:
+        print('More than one key! Send only one key.', file=results)
+        return ContinueProcessing.no
+
+    email = _get_email(msg)
+    if not email:
+        print('No email to change key of.', file=results)
+        return ContinueProcessing.no
+
+    pgp_address = PGPAddress.for_email(email)
+    if pgp_address is None:
+        print('A pgp enabled address not found.', file=results)
+        return ContinueProcessing.no
+
+    workflow = KeyChangeWorkflow(mlist, pgp_address, keys.pop())
+    list(workflow)
+    print('Key change request received.', file=results)
+    return ContinueProcessing.no
 
 
 def _cmd_revoke(pgp_list, mlist, msg, msgdata, arguments, results):