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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, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 # USA from __future__ import print_function import apt_pkg import json import os import re import shutil import subprocess import tempfile from gettext import gettext as _ from threading import Thread from softwareproperties.shortcuts import ShortcutException try: import urllib.request from urllib.error import HTTPError, URLError import urllib.parse from http.client import HTTPException NEED_PYCURL = False except ImportError: NEED_PYCURL = True import pycurl HTTPError = pycurl.error SKS_KEYSERVER = 'https://keyserver.ubuntu.com/pks/lookup?op=get&options=mr&exact=on&search=0x%s' # maintained until 2015 LAUNCHPAD_PPA_API = 'https://launchpad.net/api/1.0/%s/+archive/%s' LAUNCHPAD_USER_API = 'https://launchpad.net/api/1.0/%s' LAUNCHPAD_USER_PPAS_API = 'https://launchpad.net/api/1.0/%s/ppas' LAUNCHPAD_DISTRIBUTION_API = 'https://launchpad.net/api/1.0/%s' LAUNCHPAD_DISTRIBUTION_SERIES_API = 'https://launchpad.net/api/1.0/%s/%s' # Specify to use the system default SSL store; change to a different path # to test with custom certificates. LAUNCHPAD_PPA_CERT = "/etc/ssl/certs/ca-certificates.crt" class CurlCallback: def __init__(self): self.contents = '' def body_callback(self, buf): self.contents = self.contents + buf class PPAException(Exception): def __init__(self, value, original_error=None): self.value = value self.original_error = original_error def __str__(self): return repr(self.value) def encode(s): return re.sub("[^a-zA-Z0-9_-]", "_", s) def get_info_from_https(url, accept_json): if NEED_PYCURL: # python2 has no cert verification so we need pycurl data = _get_https_content_pycurl(url, accept_json) else: # python3 has cert verification so we can use the buildin urllib data = _get_https_content_py3(url, accept_json) if accept_json: return json.loads(data) else: return data def get_info_from_lp(lp_url): return get_info_from_https(lp_url, True) def get_ppa_info_from_lp(owner_name, ppa): if owner_name[0] != '~': owner_name = '~' + owner_name lp_url = LAUNCHPAD_PPA_API % (owner_name, ppa) return get_info_from_lp(lp_url) def series_valid_for_distro(distribution, series): lp_url = LAUNCHPAD_DISTRIBUTION_SERIES_API % (distribution, series) try: get_info_from_lp(lp_url) return True except PPAException: return False def get_current_series_from_lp(distribution): lp_url = LAUNCHPAD_DISTRIBUTION_API % distribution return os.path.basename(get_info_from_lp(lp_url)["current_series_link"]) def _get_https_content_py3(lp_url, accept_json): try: headers = {"Accept":" application/json"} if accept_json else {} request = urllib.request.Request(str(lp_url), headers=headers) lp_page = urllib.request.urlopen(request, cafile=LAUNCHPAD_PPA_CERT) data = lp_page.read().decode("utf-8", "strict") except (URLError, HTTPException) as e: # HTTPException doesn't have a reason but might have a string # representation reason = hasattr(e, "reason") and e.reason or e raise PPAException("Error reading %s: %s" % (lp_url, reason), e) return data def _get_https_content_pycurl(lp_url, accept_json): # this is the fallback code for python2 try: callback = CurlCallback() curl = pycurl.Curl() curl.setopt(pycurl.SSL_VERIFYPEER, 1) curl.setopt(pycurl.SSL_VERIFYHOST, 2) curl.setopt(pycurl.WRITEFUNCTION, callback.body_callback) if LAUNCHPAD_PPA_CERT: curl.setopt(pycurl.CAINFO, LAUNCHPAD_PPA_CERT) curl.setopt(pycurl.URL, str(lp_url)) if accept_json: curl.setopt(pycurl.HTTPHEADER, ["Accept: application/json"]) curl.perform() response = curl.getinfo(curl.RESPONSE_CODE) curl.close() data = callback.contents except pycurl.error as e: raise PPAException("Error reading %s: %s" % (lp_url, e), e) if response != 200: raise PPAException("Error reading %s: response code %i" % (lp_url, response)) return data def mangle_ppa_shortcut(shortcut): ppa_shortcut = shortcut.split(":")[1] if ppa_shortcut.startswith("/"): ppa_shortcut = ppa_shortcut.lstrip("/") user = ppa_shortcut.split("/")[0] if (user[0] == "~"): user = user[1:] ppa_path_objs = ppa_shortcut.split("/")[1:] ppa_path = [] if (len(ppa_path_objs) < 1): ppa_path = ['ubuntu', 'ppa'] elif (len(ppa_path_objs) == 1): ppa_path.insert(0, "ubuntu") ppa_path.extend(ppa_path_objs) else: ppa_path = ppa_path_objs ppa = "~%s/%s" % (user, "/".join(ppa_path)) return ppa def verify_keyid_is_v4(signing_key_fingerprint): """Verify that the keyid is a v4 fingerprint with at least 160bit""" return len(signing_key_fingerprint) >= 160/8 class AddPPASigningKey(object): " thread class for adding the signing key in the background " def __init__(self, ppa_path, keyserver=None): self.ppa_path = ppa_path self._homedir = tempfile.mkdtemp() def __del__(self): shutil.rmtree(self._homedir) def gpg_cmd(self, args): cmd = "gpg -q --homedir %s --no-default-keyring --no-options --import --import-options %s" % (self._homedir, args) return subprocess.Popen(cmd.split(), stdin=subprocess.PIPE, stdout=subprocess.PIPE) def _recv_key(self, signing_key_fingerprint): try: # double check that the signing key is a v4 fingerprint (160bit) if not verify_keyid_is_v4(signing_key_fingerprint): print("Error: signing key fingerprint '%s' too short" % signing_key_fingerprint) return False except TypeError: print("Error: signing key fingerprint does not exist") return False return get_info_from_https(SKS_KEYSERVER % signing_key_fingerprint, accept_json=False) def _minimize_key(self, key): p = self.gpg_cmd("import-minimal,import-export") (minimal_key, _) = p.communicate(key.encode()) if p.returncode != 0: return False return minimal_key def _get_fingerprints(self, key): fingerprints = [] p = self.gpg_cmd("show-only --fingerprint --batch --with-colons") (output, _) = p.communicate(key) if p.returncode == 0: for line in output.decode('utf-8').splitlines(): if line.startswith("fpr:"): fingerprints.append(line.split(":")[9]) return fingerprints def _verify_fingerprint(self, key, expected_fingerprint): got_fingerprints = self._get_fingerprints(key) if len(got_fingerprints) != 1: print("Got '%s' fingerprints, expected only one" % len(got_fingerprints)) return False got_fingerprint = got_fingerprints[0] if got_fingerprint != expected_fingerprint: print("Fingerprints do not match, not importing: '%s' != '%s'" % ( expected_fingerprint, got_fingerprint)) return False return True def add_ppa_signing_key(self, ppa_path=None): """Query and add the corresponding PPA signing key. The signing key fingerprint is obtained from the Launchpad PPA page, via a secure channel, so it can be trusted. """ if ppa_path is None: ppa_path = self.ppa_path try: ppa_info = get_ppa_info(ppa_path) except PPAException as e: print(e.value) return False try: signing_key_fingerprint = ppa_info["signing_key_fingerprint"] except IndexError as e: print("Error: can't find signing_key_fingerprint at %s" % ppa_path) return False # download the armored_key armored_key = self._recv_key(signing_key_fingerprint) if not armored_key: return False trustedgpgd = apt_pkg.config.find_dir("Dir::Etc::trustedparts") apt_keyring = os.path.join(trustedgpgd, encode(ppa_info["reference"][1:])) minimal_key = self._minimize_key(armored_key) if not minimal_key: return False if not self._verify_fingerprint(minimal_key, signing_key_fingerprint): return False with open('%s.gpg' % apt_keyring, 'wb') as f: f.write(minimal_key) return True class AddPPASigningKeyThread(Thread, AddPPASigningKey): # This class is legacy. There are no users inside the software-properties # codebase other than a test case. It was left in case there were outside # users. Internally, we've changed from having a class implement the # tread to explicitly launching a thread and invoking a method in it # see check_and_add_key_for_whitelisted_shortcut for how. def __init__(self, ppa_path, keyserver=None): Thread.__init__(self) AddPPASigningKey.__init__(self, ppa_path=ppa_path, keyserver=keyserver) def run(self): self.add_ppa_signing_key(self.ppa_path) def _get_suggested_ppa_message(user, ppa_name): try: msg = [] try: try: lp_user = get_info_from_lp(LAUNCHPAD_USER_API % user) except PPAException: return _("ERROR: '{user}' user or team does not exist.").format(user=user) lp_ppas = get_info_from_lp(LAUNCHPAD_USER_PPAS_API % user) entity_name = _("team") if lp_user["is_team"] else _("user") if lp_ppas["total_size"] > 0: # Translators: %(entity)s is either "team" or "user" msg.append(_("The %(entity)s named '%(user)s' has no PPA named '%(ppa)s'") % { 'entity' : entity_name, 'user' : user, 'ppa' : ppa_name}) msg.append(_("Please choose from the following available PPAs:")) for ppa in lp_ppas["entries"]: msg.append(_(" * '%(name)s': %(displayname)s") % { 'name' : ppa["name"], 'displayname' : ppa["displayname"]}) else: # Translators: %(entity)s is either "team" or "user" msg.append(_("The %(entity)s named '%(user)s' does not have any PPA") % { 'entity' : entity_name, 'user' : user}) return '\n'.join(msg) except KeyError: return '' except ImportError: return _("Please check that the PPA name or format is correct.") def get_ppa_info(shortcut): user = shortcut.split("/")[0] ppa = "/".join(shortcut.split("/")[1:]) try: ret = get_ppa_info_from_lp(user, ppa) ret["distribution"] = ret["distribution_link"].split('/')[-1] ret["owner"] = ret["owner_link"].split('/')[-1] return ret except (HTTPError, Exception): msg = [] msg.append(_("Cannot add PPA: 'ppa:%s/%s'.") % ( user, ppa)) # If the PPA does not exist, then try to find if the user/team # exists. If it exists, list down the PPAs raise ShortcutException('\n'.join(msg) + "\n" + _get_suggested_ppa_message(user, ppa)) except (ValueError, PPAException): raise ShortcutException( _("Cannot access PPA (%s) to get PPA information, " "please check your internet connection.") % \ (LAUNCHPAD_PPA_API % (user, ppa))) class PPAShortcutHandler(object): def __init__(self, shortcut): super(PPAShortcutHandler, self).__init__() try: self.shortcut = mangle_ppa_shortcut(shortcut) except: raise ShortcutException(_("ERROR: '{shortcut}' is not a valid ppa format") .format(shortcut=shortcut)) info = get_ppa_info(self.shortcut) if "private" in info and info["private"]: raise ShortcutException( _("Adding private PPAs is not supported currently")) self._info = info def info(self): return self._info def expand(self, codename, distro=None): if (distro is not None and distro != self._info["distribution"] and not series_valid_for_distro(self._info["distribution"], codename)): # The requested PPA is for a foreign distribution. Guess that # the user wants that distribution's current series. # This only applies if the local distribution is not the same # distribution the remote PPA is associated with AND the local # codename is not equal to the PPA's series. # e.g. local:Foobar/xenial and ppa:Ubuntu/xenial will use 'xenial' # local:Foobar/fluffy and ppa:Ubuntu/xenial will use '$latest' codename = get_current_series_from_lp(self._info["distribution"]) debline = "deb http://ppa.launchpad.net/%s/%s/%s %s main" % ( self._info["owner"][1:], self._info["name"], self._info["distribution"], codename) sourceslistd = apt_pkg.config.find_dir("Dir::Etc::sourceparts") filename = os.path.join(sourceslistd, "%s-%s-%s-%s.list" % ( encode(self._info["owner"][1:]), encode(self._info["distribution"]), encode(self._info["name"]), codename)) return (debline, filename) def should_confirm(self): return True def add_key(self, keyserver=None): apsk = AddPPASigningKey(self._info["reference"], keyserver=keyserver) return apsk.add_ppa_signing_key() def shortcut_handler(shortcut): if not shortcut.startswith("ppa:"): return None return PPAShortcutHandler(shortcut) if __name__ == "__main__": import sys ppa = sys.argv[1].split(":")[1] print(get_ppa_info(ppa))