Newer
Older
from synapse.storage._base import SQLBaseStore
from synapse.storage.signatures import SignatureStore
from synapse.storage.event_federation import EventFederationStore
from syutil.base64util import encode_base64, decode_base64
from synapse.crypto.event_signing import compute_event_signature
from synapse.events.builder import EventBuilder
from synapse.events.utils import prune_event
from synapse.crypto.event_signing import check_event_content_hash
from syutil.crypto.jsonsign import (
verify_signed_json, SignatureVerifyException,
from syutil.crypto.signing_key import decode_verify_key_bytes
from syutil.jsonutil import encode_canonical_json
import dns.resolver
import hashlib
import json
import sqlite3
delta_sql = """
CREATE TABLE IF NOT EXISTS event_json(
event_id TEXT NOT NULL,
room_id TEXT NOT NULL,
json BLOB NOT NULL,
CONSTRAINT ev_j_uniq UNIQUE (event_id)
);
CREATE INDEX IF NOT EXISTS event_json_id ON event_json(event_id);
CREATE INDEX IF NOT EXISTS event_json_room_id ON event_json(room_id);
"""
class Store(object):
_get_event_signatures_txn = SignatureStore.__dict__["_get_event_signatures_txn"]
_get_event_content_hashes_txn = SignatureStore.__dict__["_get_event_content_hashes_txn"]
_get_event_reference_hashes_txn = SignatureStore.__dict__["_get_event_reference_hashes_txn"]
_get_prev_event_hashes_txn = SignatureStore.__dict__["_get_prev_event_hashes_txn"]
_get_prev_events_and_state = EventFederationStore.__dict__["_get_prev_events_and_state"]
_get_auth_events = EventFederationStore.__dict__["_get_auth_events"]
cursor_to_dict = SQLBaseStore.__dict__["cursor_to_dict"]
_simple_select_onecol_txn = SQLBaseStore.__dict__["_simple_select_onecol_txn"]
_simple_select_list_txn = SQLBaseStore.__dict__["_simple_select_list_txn"]
_simple_insert_txn = SQLBaseStore.__dict__["_simple_insert_txn"]
def _generate_event_json(self, txn, rows):
events = []
for row in rows:
d = dict(row)
d.pop("stream_ordering", None)
d.pop("topological_ordering", None)
d.pop("processed", None)
if "origin_server_ts" not in d:
d["origin_server_ts"] = d.pop("ts", 0)
else:
d.pop("ts", 0)
d.pop("prev_state", None)
d.update(json.loads(d.pop("unrecognized_keys")))
d["sender"] = d.pop("user_id")
d["content"] = json.loads(d["content"])
if "age_ts" not in d:
# For compatibility
d["age_ts"] = d.get("origin_server_ts", 0)
d.setdefault("unsigned", {})["age_ts"] = d.pop("age_ts")
# d.pop("membership", None)
d.pop("state_hash", None)
d.pop("replaces_state", None)
b = EventBuilder(d)
b.internal_metadata.outlier = outlier
events.append(b)
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
for i, ev in enumerate(events):
signatures = self._get_event_signatures_txn(
txn, ev.event_id,
)
ev.signatures = {
n: {
k: encode_base64(v) for k, v in s.items()
}
for n, s in signatures.items()
}
hashes = self._get_event_content_hashes_txn(
txn, ev.event_id,
)
ev.hashes = {
k: encode_base64(v) for k, v in hashes.items()
}
prevs = self._get_prev_events_and_state(txn, ev.event_id)
ev.prev_events = [
(e_id, h)
for e_id, h, is_state in prevs
if is_state == 0
]
# ev.auth_events = self._get_auth_events(txn, ev.event_id)
hashes = dict(ev.auth_events)
for e_id, hash in ev.prev_events:
if e_id in hashes and not hash:
hash.update(hashes[e_id])
#
# if hasattr(ev, "state_key"):
# ev.prev_state = [
# (e_id, h)
# for e_id, h, is_state in prevs
# if is_state == 1
# ]
return [e.build() for e in events]
store = Store()
def get_key(server_name):
print "Getting keys for: %s" % (server_name,)
targets = []
if ":" in server_name:
target, port = server_name.split(":")
targets.append((target, int(port)))
return
try:
answers = dns.resolver.query("_matrix._tcp." + server_name, "SRV")
for srv in answers:
targets.append((srv.target, srv.port))
except dns.resolver.NXDOMAIN:
targets.append((server_name, 8448))
except:
print "Failed to lookup keys for %s" % (server_name,)
return {}
for target, port in targets:
url = "https://%s:%i/_matrix/key/v1" % (target, port)
try:
keys = json.load(urllib2.urlopen(url, timeout=2))
verify_keys = {}
for key_id, key_base64 in keys["verify_keys"].items():
verify_key = decode_verify_key_bytes(
key_id, decode_base64(key_base64)
)
verify_signed_json(keys, server_name, verify_key)
verify_keys[key_id] = verify_key
print "Got keys for: %s" % (server_name,)
return verify_keys
except urllib2.URLError:
pass
print "Failed to get keys for %s" % (server_name,)
return {}
def reinsert_events(cursor, server_name, signing_key):
cursor.executescript(delta_sql)
)
rows = store.cursor_to_dict(cursor)
events = store._generate_event_json(cursor, rows)
print "Got events from DB."
algorithms = {
"sha256": hashlib.sha256,
}
key_id = "%s:%s" % (signing_key.alg, signing_key.version)
verify_key = signing_key.verify_key
verify_key.alg = signing_key.alg
verify_key.version = signing_key.version
server_keys = {
server_name: {
key_id: verify_key
}
}
for event in events:
for alg_name in event.hashes:
if check_event_content_hash(event, algorithms[alg_name]):
pass
else:
pass
print "FAIL content hash %s %s" % (alg_name, event.event_id, )
for host, sigs in event.signatures.items():
pruned = prune_event(event)
for key_id in sigs:
if host not in server_keys:
server_keys[host] = get_key(host)
if key_id in server_keys[host]:
try:
verify_signed_json(
pruned.get_pdu_json(),
host,
server_keys[host][key_id]
)
if host == server_name:
have_own_correctly_signed = True
except SignatureVerifyException:
print "FAIL signature check %s %s" % (
key_id, event.event_id
)
# TODO: Re sign with our own server key
if not have_own_correctly_signed:
sigs = compute_event_signature(event, server_name, signing_key)
event.signatures.update(sigs)
pruned = prune_event(event)
for key_id in event.signatures[server_name]:
verify_signed_json(
pruned.get_pdu_json(),
server_name,
server_keys[server_name][key_id]
)
event_json = encode_canonical_json(
event.get_dict()
).decode("UTF-8")
metadata_json = encode_canonical_json(
event.internal_metadata.get_dict()
).decode("UTF-8")
store._simple_insert_txn(
cursor,
table="event_json",
values={
"event_id": event.event_id,
"room_id": event.room_id,
"json": event_json,
},
or_replace=True,
)
def main(database, server_name, signing_key):
conn = sqlite3.connect(database)
reinsert_events(cursor, server_name, signing_key)
conn.commit()
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("database")
parser.add_argument("server_name")
parser.add_argument(
"signing_key", type=argparse.FileType('r'),
)
args = parser.parse_args()
signing_key = syutil.crypto.signing_key.read_signing_keys(
args.signing_key
)
main(args.database, args.server_name, signing_key[0])