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+# -*- coding: utf-8 -*-
+# migrator.py
+# Copyright (C) 2015 LEAP
+#
+# 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/>.
+
+"""
+Document migrator
+"""
+# XXX: versioning has being added 12/2015 when keymanager was not
+# much in use in the wild. We can probably drop support for
+# keys without version at some point.
+
+
+from collections import namedtuple
+from twisted.internet.defer import gatherResults, succeed
+
+from leap.keymanager.keys import (
+ TAGS_PRIVATE_INDEX,
+ KEYMANAGER_KEY_TAG,
+ KEYMANAGER_ACTIVE_TAG,
+
+ KEYMANAGER_DOC_VERSION,
+ KEY_VERSION_KEY,
+ KEY_ID_KEY,
+ KEY_VALIDATION_KEY,
+ KEY_LAST_AUDITED_AT_KEY,
+ KEY_ENCR_USED_KEY,
+ KEY_SIGN_USED_KEY,
+)
+from leap.keymanager.validation import ValidationLevels
+
+
+KeyDocs = namedtuple("KeyDocs", ['key', 'active'])
+
+
+class KeyDocumentsMigrator(object):
+ """
+ Migrate old KeyManager Soledad Documents to the newest schema
+ """
+
+ def __init__(self, soledad):
+ self._soledad = soledad
+
+ def migrate(self):
+ deferred_public = self._get_docs(private=False)
+ deferred_public.addCallback(self._migrate_docs)
+
+ deferred_private = self._get_docs(private=True)
+ deferred_private.addCallback(self._migrate_docs)
+
+ return gatherResults([deferred_public, deferred_private])
+
+ def _get_docs(self, private=False):
+ private_value = '1' if private else '0'
+
+ deferred_keys = self._soledad.get_from_index(
+ TAGS_PRIVATE_INDEX,
+ KEYMANAGER_KEY_TAG,
+ private_value)
+ deferred_active = self._soledad.get_from_index(
+ TAGS_PRIVATE_INDEX,
+ KEYMANAGER_ACTIVE_TAG,
+ private_value)
+ return gatherResults([deferred_keys, deferred_active])
+
+ def _migrate_docs(self, (key_docs, active_docs)):
+ def update_keys(keys):
+ deferreds = []
+ for key_id in keys:
+ key = keys[key_id].key
+ actives = keys[key_id].active
+
+ d = self._migrate_actives(key, actives)
+ deferreds.append(d)
+
+ d = self._migrate_key(key)
+ deferreds.append(d)
+ return gatherResults(deferreds)
+
+ d = self._buildKeyDict(key_docs, active_docs)
+ d.addCallback(lambda keydict: self._filter_outdated(keydict))
+ d.addCallback(update_keys)
+
+ def _buildKeyDict(self, keys, actives):
+ keydict = {
+ fp2id(key.content[KEY_FINGERPRINT_KEY]): KeyDocs(key, [])
+ for key in keys}
+
+ deferreds = []
+ for active in actives:
+ if KEY_ID_KEY in active.content:
+ key_id = active.content[KEY_ID_KEY]
+ if key_id not in keydict:
+ d = self._soledad.delete_doc(active)
+ deferreds.append(d)
+ continue
+ keydict[key_id].active.append(active)
+
+ d = gatherResults(deferreds)
+ d.addCallback(lambda _: keydict)
+ return d
+
+ def _filter_outdated(self, keydict):
+ outdated = {}
+ for key_id, docs in keydict.items():
+ if ((docs.key and KEY_VERSION_KEY not in docs.key.content) or
+ docs.active):
+ outdated[key_id] = docs
+ return outdated
+
+ def _migrate_actives(self, key, actives):
+ if not key:
+ deferreds = []
+ for active in actives:
+ d = self._soledad.delete_doc(active)
+ deferreds.append(d)
+ return gatherResults(deferreds)
+
+ validation = str(ValidationLevels.Weak_Chain)
+ last_audited = 0
+ encr_used = False
+ sign_used = False
+ if len(actives) == 1 and KEY_VERSION_KEY not in key.content:
+ # we can preserve the validation of the key if there is only one
+ # active address for the key
+ validation = key.content[KEY_VALIDATION_KEY]
+ last_audited = key.content[KEY_LAST_AUDITED_AT_KEY]
+ encr_used = key.content[KEY_ENCR_USED_KEY]
+ sign_used = key.content[KEY_SIGN_USED_KEY]
+
+ deferreds = []
+ for active in actives:
+ if KEY_VERSION_KEY in active.content:
+ continue
+
+ active.content[KEY_VERSION_KEY] = KEYMANAGER_DOC_VERSION
+ active.content[KEY_VALIDATION_KEY] = validation
+ active.content[KEY_LAST_AUDITED_AT_KEY] = last_audited
+ active.content[KEY_ENCR_USED_KEY] = encr_used
+ active.content[KEY_SIGN_USED_KEY] = sign_used
+ d = self._soledad.put_doc(active)
+ deferreds.append(d)
+ return gatherResults(deferreds)
+
+ def _migrate_key(self, key):
+ if not key or KEY_VERSION_KEY in key.content:
+ return succeed(None)
+
+ key.content[KEY_VERSION_KEY] = KEYMANAGER_DOC_VERSION
+ del key.content[KEY_VALIDATION_KEY]
+ del key.content[KEY_LAST_AUDITED_AT_KEY]
+ del key.content[KEY_ENCR_USED_KEY]
+ del key.content[KEY_SIGN_USED_KEY]
+ return self._soledad.put_doc(key)
+
+
+def fp2id(fingerprint):
+ KEY_ID_LENGTH = 16
+ return fingerprint[-KEY_ID_LENGTH:]