1 files changed, 117 insertions, 0 deletions
diff --git a/src/mailman_pgp/workflows/key_change.py b/src/mailman_pgp/workflows/key_change.py
new file mode 100644
index 0000000..0098b19
--- /dev/null
+++ b/src/mailman_pgp/workflows/key_change.py
@@ -0,0 +1,117 @@
+# Copyright (C) 2017 Jan Jancar
+#
+# This file is a part of the Mailman PGP plugin.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+""""""
+from mailman.email.message import UserNotification
+from mailman.interfaces.pending import IPendable, IPendings
+from mailman.interfaces.workflows import IWorkflow
+from mailman.workflows.base import Workflow
+from pgpy import PGPKey
+from public import public
+from zope.component import getUtility
+from zope.interface import implementer
+
+from mailman_pgp.model.address import PGPAddress
+from mailman_pgp.pgp.utils import copy_headers
+from mailman_pgp.pgp.wrapper import PGPWrapper
+
+CHANGE_CONFIRM_REQUEST = """\
+----------
+TODO: this is a pgp enabled list.
+You requested to change your key.
+Reply to this message with this whole text
+signed with your supplied key, either inline or PGP/MIME.
+
+Fingerprint: {}
+Token: {}
+----------
+"""
+
+
+@public
+@implementer(IWorkflow)
+class KeyChangeWorkflow(Workflow):
+    name = 'pgp-key-change-workflow'
+    description = ''
+    initial_state = 'send_key_confirm_request'
+    save_attributes = (
+        'address_key',
+        'pubkey_key'
+    )
+
+    def __init__(self, mlist, pgp_address=None, pubkey=None):
+        super().__init__()
+        self.mlist = mlist
+        self.pgp_address = pgp_address
+        self.pubkey = pubkey
+
+    @property
+    def address_key(self):
+        return self.pgp_address.email
+
+    @address_key.setter
+    def address_key(self, value):
+        self.pgp_address = PGPAddress.for_email(value)
+
+    @property
+    def pubkey_key(self):
+        if self.pubkey is None:
+            return None
+        return str(self.pubkey)
+
+    @pubkey_key.setter
+    def pubkey_key(self, value):
+        if value is not None:
+            self.pubkey, _ = PGPKey.from_blob(value)
+        else:
+            self.pubkey = None
+
+    def _step_send_key_confirm_request(self):
+        pendings = getUtility(IPendings)
+        pendable = KeyChangeWorkflow.pendable_class()(
+                email=self.pgp_address.email,
+                pubkey=str(self.pubkey)
+        )
+        self.token = pendings.add(pendable)
+
+        self.push('receive_key_confirmation')
+        self.save()
+        request_address = self.mlist.request_address
+        email_address = self.pgp_address.email
+        msg = UserNotification(email_address, request_address,
+                               'key confirm {}'.format(self.token),
+                               CHANGE_CONFIRM_REQUEST.format(
+                                   self.pubkey.fingerprint,
+                                   self.token))
+        wrapped = PGPWrapper(msg)
+        encrypted = wrapped.encrypt(self.pubkey)
+
+        msg.set_payload(encrypted.get_payload())
+        copy_headers(encrypted, msg, True)
+        msg.send(self.mlist)
+        raise StopIteration
+
+    def _step_receive_confirmation(self):
+        pass
+
+    @classmethod
+    def pendable_class(cls):
+        @implementer(IPendable)
+        class Pendable(dict):
+            PEND_TYPE = KeyChangeWorkflow.name
+
+        return Pendable