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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright © 2018-2024 by The Linux Foundation and contributors
__author__ = 'Konstantin Ryabitsev <konstantin@linuxfoundation.org>'
import os
import sqlite3
import wotmate
def keyring_load_pub_uid(c, use_weak):
logger.info('Loading all valid pubkeys')
uid_hash_rowid_map = {}
pub_keyid_rowid_map = {}
current_pubkey = None
current_pubrowid = None
is_primary = 1
ignored_keys = 0
ignored_uids = 0
for line in wotmate.gpg_get_lines(['--list-public-keys'], [b'pub:', b'uid']):
fields = wotmate.gpg_get_fields(line)
if fields[0] == 'pub':
# is this key expired/revoked or is otherwise invalid?
if fields[1] in ('e', 'r', 'i'):
ignored_keys += 1
continue
# is this key too weak to bother considering it?
if not use_weak and (fields[3] in ('1', '17') and int(fields[2]) < 2048):
# logger.info('Ignoring weak key: %s' % fields[4])
ignored_keys += 1
continue
data = (
fields[4],
fields[1],
fields[2],
fields[3],
fields[5],
fields[6],
fields[8],
)
c.execute('INSERT INTO pub VALUES (?,?,?,?,?,?,?)', data)
current_pubkey = fields[4]
current_pubrowid = c.lastrowid
is_primary = 1
elif fields[0] == 'uid':
if fields[1] in ('e', 'r', 'i'):
ignored_uids += 1
continue
if current_pubrowid is not None:
data = (
current_pubrowid,
fields[1],
fields[5],
fields[6],
fields[9],
is_primary,
)
c.execute('INSERT INTO uid VALUES (?,?,?,?,?,?)', data)
uid_hash_rowid_map[(current_pubkey, fields[7])] = c.lastrowid
if is_primary:
pub_keyid_rowid_map[current_pubkey] = (current_pubrowid, c.lastrowid)
is_primary = 0
else:
ignored_uids += 1
else:
pass
logger.info('Loaded %s pubkeys (%s ignored)' % (len(pub_keyid_rowid_map), ignored_keys))
logger.info('Loaded %s uids (%s ignored)' % (len(uid_hash_rowid_map), ignored_uids))
return pub_keyid_rowid_map, uid_hash_rowid_map
def keyring_load_sig_data(c, pub_keyid_rowid_map, uid_hash_rowid_map):
logger.info('Loading signature data')
sigquery = 'INSERT INTO sig VALUES (?,?,?,?,?)'
# used to track the current pubkey/uid
pubkeyid = None
uidrowid = None
uidsigs = {}
revsigs = []
is_revuid = False
sigcount = 0
ignored_sigs = 0
for line in wotmate.gpg_get_lines(['--list-sigs', '--fast-list-mode'],
[b'pub:', b'uid', b'sig:', b'rev:']):
fields = wotmate.gpg_get_fields(line)
if uidsigs and fields[0] in ('pub', 'uid'):
c.executemany(sigquery, uidsigs.values())
sigcount += len(uidsigs)
uidsigs = {}
revsigs = []
if fields[0] == 'pub':
uidrowid = None
pubkeyid = None
is_revuid = False
if fields[4] in pub_keyid_rowid_map.keys():
pubkeyid = fields[4]
elif fields[0] == 'uid':
if not pubkeyid:
continue
# is this uid expired/revoked or is otherwise invalid?
if fields[1] in ('e', 'r', 'i'):
is_revuid = True
continue
try:
uidrowid = uid_hash_rowid_map[(pubkeyid, fields[7])]
except IndexError:
# unknown uid somehow, ignore it
continue
elif fields[0] in ('sig', 'rev'):
if not pubkeyid or is_revuid:
ignored_sigs += 1
continue
# some gpg versions, when using --fast-list-mode, don't show UID
# entries, so for those cases use the primary UID of the pubkey
if uidrowid is None:
uidrowid = pub_keyid_rowid_map[pubkeyid][1]
sigkeyid = fields[4]
# ignore self-sigs
if sigkeyid == pubkeyid:
ignored_sigs += 1
continue
# We use this map to eject revoked sigs before we store them
# We only want sig types 0x10-13
if len(fields[10]) >= 2:
sigtype = int(fields[10][:2], base=16)
if sigtype == 0x30:
# this is a revsig!
if sigkeyid in uidsigs.keys():
# remove this signature from our sigs to store
del(uidsigs[sigkeyid])
ignored_sigs += 1
# add to revsigs, so we ignore this sig if we see it
revsigs.append(sigkeyid)
continue
elif sigtype < 0x10 or sigtype > 0x13:
ignored_sigs += 1
continue
else:
# don't want this sig, as it's not anything we recognize
# for our purposes
continue
# has this sig been revoked?
if sigkeyid in revsigs:
ignored_sigs += 1
continue
# do we have the key that signed it?
if sigkeyid in pub_keyid_rowid_map.keys():
uidsigs[sigkeyid] = (
uidrowid,
pub_keyid_rowid_map[sigkeyid][0],
fields[5],
fields[6],
sigtype
)
if uidsigs:
# store all sigs seen for previous key+uid
c.executemany(sigquery, uidsigs.values())
sigcount += len(uidsigs)
logger.info('Loaded %s valid sigs (%s ignored)' % (sigcount, ignored_sigs))
if __name__ == '__main__':
import argparse
ap = argparse.ArgumentParser(
description='Create a sqlite database of key and signature data',
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
ap.add_argument('--quiet', action='store_true',
default=False,
help='Be quiet and only output errors')
ap.add_argument('--dbfile', dest='dbfile',
default='siginfo.db',
help='Create database in this file')
ap.add_argument('--use-weak-keys', dest='use_weak',
action='store_true', default=False,
help='Do not discard keys considered too weak')
ap.add_argument('--gpgbin',
default='/usr/bin/gpg',
help='Location of the gpg binary to use')
ap.add_argument('--gnupghome',
help='Set this as gnupghome instead of using the default')
cmdargs = ap.parse_args()
logger = wotmate.get_logger(cmdargs.quiet)
if cmdargs.gnupghome:
wotmate.GNUPGHOME = cmdargs.gnupghome
if cmdargs.gpgbin:
wotmate.GPGBIN = cmdargs.gpgbin
try:
os.unlink(cmdargs.dbfile)
logger.debug('Removed old %s', cmdargs.dbfile)
except OSError as ex:
pass
dbconn = sqlite3.connect(cmdargs.dbfile)
cursor = dbconn.cursor()
wotmate.init_sqlite_db(cursor)
(pub_map, uid_map) = keyring_load_pub_uid(cursor, cmdargs.use_weak)
keyring_load_sig_data(cursor, pub_map, uid_map)
dbconn.commit()
dbconn.close()
logger.info('Wrote %s' % cmdargs.dbfile)
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