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|
#
#-*- coding:utf-8 -*-
"""
Gentoo-keys - seedhandler.py
Seed handling interface module
@copyright: 2012-2015 by Brian Dolbec <dol-sen@gentoo.org>
@copyright: 2014-2015 by Pavlos Ratis <dastergon@gentoo.org>
@license: GNU GPL2, see COPYING for details.
"""
import os
import re
from snakeoil.demandload import demandload
from gkeys.gkey import GKEY
from gkeys.lock import LockDir
from gkeys.seed import Seeds, decoder
demandload(
"json:load",
"gkeys.exception:UpdateDbError",
"gkeys.fileops:ensure_dirs",
"gkeys.fileops:updateseeds",
"gkeys.fetch:Fetch",
"sslfetch.connections:get_timestamp",
)
class SeedHandler(object):
def __init__(self, logger, config):
self.config = config
self.logger = logger
self.fingerprint_re = re.compile('[0-9A-Fa-f]{40}')
self.finerprint_re2 = re.compile('[0-9A-Fa-f]{4}( [0-9A-Fa-f]{4}){9}')
self.seeds = None
self.seedsdir_lock = None
self.update_lock = None
def new(self, args, checkgkey=False):
newgkey = self.build_gkeydict(args)
if checkgkey:
newgkey, is_good = self.check_gkey(newgkey)
if is_good:
newgkey = GKEY(**newgkey)
self.logger.debug("SeedHandler: new; new gkey: %s" % str(newgkey))
else:
return None
else:
newgkey = GKEY(**newgkey)
self.logger.debug("SeedHandler: new; NON-checked new gkey: %s" % str(newgkey))
return newgkey
@staticmethod
def build_gkeydict(args):
keyinfo = {}
for attr in GKEY._fields:
try:
value = getattr(args, attr)
if attr == 'name' and isinstance(value, list):
value = " ".join(value)
if attr in ['fingerprint', 'keys'] and value:
value = [x.replace(" ", "") for x in value]
keyinfo[attr] = value
if value is not None and attr in ['keydir', 'name', 'nick']:
keyinfo[attr] = decoder(value)
else:
keyinfo[attr] = value
except AttributeError:
if attr in GKEY._fields:
keyinfo[attr] = None
return keyinfo
def compare_seeds(self, seeds1, seeds2) :
'''Compares two seed lists and returns the differences
@param seeds1: set of seeds to be compared
@param seeds2: set of seeds to be compared
@return added_gkeys: list of keys that are included in seed2 but not seed1
@return changed_gkeys: list of keys that are included in seed1 and seed2 but have been altered
@return removed_gkeys: list of keys that are included in seed1 but not in seed2
'''
old_gkeys = seeds1[1]
new_gkeys = seeds2[1]
changed_gkeys = []
old_changed_gkeys = []
removed_gkeys = []
added_gkeys = []
if old_gkeys:
for new_gkey in new_gkeys:
for old_gkey in old_gkeys:
if new_gkey.nick == old_gkey.nick and new_gkey != old_gkey:
changed_gkeys.append(new_gkey)
old_changed_gkeys.append(old_gkey)
if new_gkey not in old_gkeys and new_gkey not in changed_gkeys:
added_gkeys.append(new_gkey)
for old_gkey in old_gkeys:
if old_gkey not in new_gkeys and old_gkey not in old_changed_gkeys:
removed_gkeys.append(old_gkey)
else:
added_gkeys = new_gkeys
return(added_gkeys, changed_gkeys, removed_gkeys)
def compare_seeds(self, seeds1, seeds2) :
'''Compares two seed lists and returns the differences
@param seeds1: set of seeds to be compared
@param seeds2: set of seeds to be compared
@return added_gkeys: list of keys that are included in seed2 but not seed1
@return changed_gkeys: list of keys that are included in seed1 and seed2 but have been altered
@return removed_gkeys: list of keys that are included in seed1 but not in seed2
'''
old_gkeys = seeds1[1]
new_gkeys = seeds2[1]
changed_gkeys = []
old_changed_gkeys = []
removed_gkeys = []
added_gkeys = []
if old_gkeys:
for new_gkey in new_gkeys:
for old_gkey in old_gkeys:
if new_gkey.nick == old_gkey.nick and new_gkey != old_gkey:
changed_gkeys.append(new_gkey)
old_changed_gkeys.append(old_gkey)
if new_gkey not in old_gkeys and new_gkey not in changed_gkeys:
added_gkeys.append(new_gkey)
for old_gkey in old_gkeys:
if old_gkey not in new_gkeys and old_gkey not in old_changed_gkeys:
removed_gkeys.append(old_gkey)
else:
added_gkeys = new_gkeys
return(added_gkeys, changed_gkeys, removed_gkeys)
def load_seeds(self, seedfile=None, filepath=None, refresh=False):
'''Load seed file
@param seeds: string of the short name seed file
@param seedfile: string filepath of the file to load
@return Seeds class instance of the file loaded
'''
if not seedfile and not filepath:
self.logger.error("SeedHandler: load_seeds; no filename to load: "
"setting = %s. Please use the -S or -F option to indicate: which seed "
"file to use." % seedfile)
return False
if seedfile:
filepath = self.config.get_key('seeds', seedfile)
elif not filepath:
self.logger.error("SeedHandler: load_seeds; No filepath to load")
self.logger.debug("SeedHandler: load_seeds; seeds filepath to load: "
"%s" % filepath)
seeds = Seeds(config=self.config, _logger=self.logger)
seeds.load(filepath, refresh=refresh)
self.seeds = seeds
return seeds
def load_category(self, category, nicks=None, refresh=False):
'''Loads the designated key directories
@param category: string
@param nicks: list of string nick ids to load
@return Seeds class object
'''
seeds = Seeds(config=self.config, _logger=self.logger)
if category == 'sign':
catdir = self.config.get_key('sign-keydir')
else:
#keyrings = self.config.get_key('keyring')
#catdir = os.path.join(keyrings, category)
catdir = self.config.get_key('keyrings', category)
self.logger.debug("SeedHandler: load_category; catdir = %s", catdir)
try:
if not nicks:
nicks = os.listdir(catdir)
for nick in nicks:
seed_path = os.path.join(catdir, nick)
if not os.path.isdir(seed_path):
continue
gkey_path = os.path.join(seed_path, 'gkey.seeds')
seed = None
try:
with open(gkey_path, 'r') as fileseed:
seed = load(fileseed)
self.logger.debug("SeedHandler: load_category; loaded seed file %s.",
gkey_path)
except IOError as error:
self.logger.debug("SeedHandler: load_category; IOError loading seed file %s.",
gkey_path)
self.logger.debug("Error was: %s" % str(error))
if seed:
self.logger.debug("SeedHandler: load_category; processing seeds: %s", seed)
for nick in sorted(seed):
key = seed[nick]
# GKEY class change auto-update
if not 'uid' in list(key):
if not refresh:
raise UpdateDbError(category)
key['uid'] = []
if not 'keys' in list(key):
if not refresh:
raise UpdateDbError(category)
key['keys'] = key['fingerprint'][:]
seeds.add(nick, GKEY(**key))
except OSError as error:
self.logger.debug("SeedHandler: load_category; OSError for %s" % catdir)
self.logger.exception("Error was: %s" % str(error))
self.seeds = seeds
self.logger.debug("SeedHandler: load_category; seeds loaded: %s", seeds)
return seeds
def fetch_seeds(self, seeds, args, verified_dl=None):
'''Fetch new seed files
@param seeds: list of seed nicks to download
@param args: argparse namespace instance
@param verified_dl: Function pointer to the Actions.verify()
instance needed to do the download and verification
'''
http_check = re.compile(r'^(http|https)://')
urls = []
messages = []
try:
for seed in [seeds]:
seedurl = self.config.get_key('seedurls', seed)
seedpath = self.config.get_key('seeds', seed)
self.logger.debug("Seed URL/seed path...: %s, %s" % (seedurl, seedpath))
if seedurl and seedpath and http_check.match(seedurl):
urls.extend([(seed, seedurl, seedpath)])
else:
self.logger.info("Wrong seed file URLs/seed path... Skipping: %s" % seed)
except KeyError:
pass
succeeded = []
seedsdir = os.path.dirname(self.config.get_key('seeds', seeds))
updatedir = os.path.join(seedsdir, "__updates__")
mode = int(self.config.get_key('permissions', 'directories'),0)
ensure_dirs(updatedir, mode=mode)
self.update_lock = LockDir(updatedir)
self.update_lock.write_lock()
for (seed, url, filepath) in urls:
tmppath = os.path.join(updatedir, os.path.split(filepath)[-1])
# use the real timestamp file for the dl timestamp
tpath = filepath + ".timestamp"
verify_info = self.config.get_key('verify-seeds', seed).split()
args.category = verify_info[0]
args.nick = verify_info[1]
args.filename = url
args.signature = tmppath + ".sig"
args.timestamp = tpath
args.destination = tmppath
args.fetchonly = False
verified, messages_ = verified_dl(args)
messages.append(messages_)
if verified and not args.fetchonly:
self.seedsdir_lock = LockDir(seedsdir)
if (updateseeds(self.config, self.logger, tmppath, filepath) and
updateseeds(self.config, self.logger, args.signature, tpath)
):
self.logger.info("Updated seed file...: %s ... OK" % (filepath))
succeeded.append(verified)
else:
self.logger.info("Updating seed file...: %s ... Failed" % (filepath))
succeeded.append(False)
self.seedsdir_lock.unlock()
else:
# sha512sum the 2 files
pass
self.update_lock.unlock()
return (succeeded, messages)
def check_gkey(self, args):
# assume it's good until an error is found
is_good = True
try:
args['keydir'] = args.get('keydir', args['nick'])
fprs = []
keys = []
if args['keys'] or args['fingerprint']:
for fpr in args['keys']:
is_good, fingerprint = self._check_fingerprint_integrity(fpr)
if is_good:
keys.append(fingerprint)
else:
self.logger.error('Bad key from command line args: %s' % fpr)
if is_good:
args['keys'] = keys
for fpr in args['fingerprint']:
is_good, fingerprint = self._check_fingerprint_integrity(fpr)
if is_good:
fprs.append(fingerprint)
else:
self.logger.error('Bad fingerprint from command line args: %s' % fpr)
if is_good:
args['fingerprint'] = fprs
except KeyError:
self.logger.error('GPG fingerprint not found.')
is_good = False
if not is_good:
self.logger.error('An invalid key or fingerprint '
'was found for %s' % args['name'])
return args, is_good
def _check_fingerprint_integrity(self, fpr):
# assume it's good unti an error is found
is_good = True
fingerprint = fpr.replace(" ", "")
# check fingerprint integrity
if len(fingerprint) != 40:
self.logger.error(' GPGKey incorrect fingerprint ' +
'length (%s) for fingerprint: %s' % (len(fingerprint), fingerprint))
is_good = False
if not self.fingerprint_re.match(fingerprint):
self.logger.error(' GPGKey: Non hexadecimal digits in ' + 'fingerprint for fingerprint: ' + fingerprint)
is_good = False
return is_good, fingerprint
def key_search(self, args, search_args):
'''Performs a search for all listed args in the seeds'''
search_args.sort()
self.logger.debug("SeedHandler.key_search() search_args: %s" % str(search_args))
self.logger.debug("SeedHandler.key_search() search_args values: %s" % str(args))
results = []
found = {}
if isinstance(args, dict):
exact = args.get('exact', False)
_all = args.get('all', False)
else:
exact = getattr(args, 'exact', False)
_all = getattr(args, 'all', False)
for arg in search_args:
if isinstance(args, dict):
value = args.get(arg, '')
else:
value = getattr(args, arg)
seeds = self.seeds.field_search(arg, value, exact)
for seed in seeds:
if seed.nick in found:
found[seed.nick]['args'].append(arg)
else:
found[seed.nick] = {'args': [arg], 'seed': seed}
if _all:
for possible in sorted(found):
if search_args == found[possible]['args']:
results.append(found[possible]['seed'])
else:
for nick in sorted(found):
results.append(found[nick]['seed'])
return results
|