summary refs log tree commit diff
path: root/scripts/upgrade_db_to_v0.5.5.py
blob: aa0d7667acce5b1dbbf76eb6af11eb57b8d7c588 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
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 argparse
import dns.resolver
import hashlib
import json
import sqlite3
import syutil
import urllib2


delta_sql = """
CREATE TABLE IF NOT EXISTS event_json(
    event_id TEXT NOT NULL,
    room_id TEXT NOT NULL,
    internal_metadata 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")

            outlier = d.pop("outlier", False)

            # 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)

        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)

    cursor.execute(
        "SELECT * FROM events ORDER BY rowid ASC"
    )

    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, )

        have_own_correctly_signed = False
        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,
                "internal_metadata": metadata_json,
                "json": event_json,
            },
            or_replace=True,
        )


def main(database, server_name, signing_key):
    conn = sqlite3.connect(database)
    cursor = conn.cursor()
    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])