dak/import_keyring.py

   1 #!/usr/bin/env python
   2
   3 """ Imports a keyring into the database """
   4 # Copyright (C) 2007  Anthony Towns <aj@erisian.com.au>
   5 # Copyright (C) 2009  Mark Hymers <mhy@debian.org>
   6
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21 ################################################################################
  22
  23 import sys, os, re
  24 import apt_pkg, ldap
  25
  26 from daklib.config import Config
  27 from daklib.dbconn import *
  28
  29 # Globals
  30 Options = None
  31
  32 ################################################################################
  33
  34 def get_uid_info(session):
  35     byname = {}
  36     byid = {}
  37     q = session.execute("SELECT id, uid, name FROM uid")
  38     for (keyid, uid, name) in q.fetchall():
  39         byname[uid] = (keyid, name)
  40         byid[keyid] = (uid, name)
  41
  42     return (byname, byid)
  43
  44 def get_fingerprint_info(session):
  45     fins = {}
  46     q = session.execute("SELECT f.fingerprint, f.id, f.uid, f.keyring FROM fingerprint f")
  47     for (fingerprint, fingerprint_id, uid, keyring) in q.fetchall():
  48         fins[fingerprint] = (uid, fingerprint_id, keyring)
  49     return fins
  50
  51 ################################################################################
  52
  53 def usage (exit_code=0):
  54     print """Usage: dak import-keyring [OPTION]... [KEYRING]
  55   -h, --help                  show this help and exit.
  56   -L, --import-ldap-users     generate uid entries for keyring from LDAP
  57   -U, --generate-users FMT    generate uid entries from keyring as FMT"""
  58     sys.exit(exit_code)
  59
  60
  61 ################################################################################
  62
  63 def main():
  64     global Options
  65
  66     cnf = Config()
  67     Arguments = [('h',"help","Import-Keyring::Options::Help"),
  68                  ('L',"import-ldap-users","Import-Keyring::Options::Import-Ldap-Users"),
  69                  ('U',"generate-users","Import-Keyring::Options::Generate-Users", "HasArg"),
  70                 ]
  71
  72     for i in [ "help", "report-changes", "generate-users", "import-ldap-users" ]:
  73         if not cnf.has_key("Import-Keyring::Options::%s" % (i)):
  74             cnf["Import-Keyring::Options::%s" % (i)] = ""
  75
  76     keyring_names = apt_pkg.ParseCommandLine(cnf.Cnf, Arguments, sys.argv)
  77
  78     ### Parse options
  79
  80     Options = cnf.SubTree("Import-Keyring::Options")
  81
  82     if Options["Help"]:
  83         usage()
  84
  85     if len(keyring_names) != 1:
  86         usage(1)
  87
  88     ### Keep track of changes made
  89     changes = []   # (uid, changes strings)
  90
  91     ### Initialise
  92     session = DBConn().session()
  93
  94     ### Cache all the existing fingerprint entries
  95     db_fin_info = get_fingerprint_info(session)
  96
  97     ### Parse the keyring
  98
  99     keyringname = keyring_names[0]
 100     keyring = get_keyring(keyringname, session)
 101     if not keyring:
 102         print "E: Can't load keyring %s from database" % keyringname
 103         sys.exit(1)
 104
 105     keyring.load_keys(keyringname)
 106
 107     ### Generate new uid entries if they're needed (from LDAP or the keyring)
 108     if Options["Generate-Users"]:
 109         format = Options["Generate-Users"]
 110         (desuid_byname, desuid_byid) = keyring.generate_users_from_keyring(Options["Generate-Users"], session)
 111     elif Options["Import-Ldap-Users"]:
 112         (desuid_byname, desuid_byid) = keyring.import_users_from_ldap(session)
 113     else:
 114         (desuid_byname, desuid_byid) = ({}, {})
 115
 116     ### Cache all the existing uid entries
 117     (db_uid_byname, db_uid_byid) = get_uid_info(session)
 118
 119     ### Update full names of applicable users
 120     for keyid in desuid_byid.keys():
 121         uid = (keyid, desuid_byid[keyid][0])
 122         name = desuid_byid[keyid][1]
 123         oname = db_uid_byid[keyid][1]
 124         if name and oname != name:
 125             changes.append((uid[1], "Full name: %s" % (name)))
 126             session.execute("UPDATE uid SET name = :name WHERE id = :keyid",
 127                             {'name': name, 'keyid': keyid})
 128
 129     # The fingerprint table (fpr) points to a uid and a keyring.
 130     #   If the uid is being decided here (ldap/generate) we set it to it.
 131     #   Otherwise, if the fingerprint table already has a uid (which we've
 132     #     cached earlier), we preserve it.
 133     #   Otherwise we leave it as None
 134
 135     fpr = {}
 136     for z in keyring.keys.keys():
 137         keyid = db_uid_byname.get(keyring.keys[z].get("uid", None), [None])[0]
 138         if keyid == None:
 139             keyid = db_fin_info.get(keyring.keys[z]["fingerprints"][0], [None])[0]
 140         for y in keyring.keys[z]["fingerprints"]:
 141             fpr[y] = (keyid, keyring.keyring_id)
 142
 143     # For any keys that used to be in this keyring, disassociate them.
 144     # We don't change the uid, leaving that for historical info; if
 145     # the id should change, it'll be set when importing another keyring.
 146
 147     for f,(u,fid,kr) in db_fin_info.iteritems():
 148         if kr != keyring.keyring_id:
 149             continue
 150
 151         if f in fpr:
 152             continue
 153
 154         changes.append((db_uid_byid.get(u, [None])[0], "Removed key: %s" % (f)))
 155         session.execute("""UPDATE fingerprint
 156                               SET keyring = NULL,
 157                                   source_acl_id = NULL,
 158                                   binary_acl_id = NULL,
 159                                   binary_reject = TRUE
 160                             WHERE id = :fprid""", {'fprid': fid})
 161
 162         session.execute("""DELETE FROM binary_acl_map WHERE fingerprint_id = :fprid""", {'fprid': fid})
 163
 164     # For the keys in this keyring, add/update any fingerprints that've
 165     # changed.
 166
 167     for f in fpr:
 168         newuid = fpr[f][0]
 169         newuiduid = db_uid_byid.get(newuid, [None])[0]
 170
 171         (olduid, oldfid, oldkid) = db_fin_info.get(f, [-1,-1,-1])
 172
 173         if olduid == None:
 174             olduid = -1
 175
 176         if oldkid == None:
 177             oldkid = -1
 178
 179         if oldfid == -1:
 180             changes.append((newuiduid, "Added key: %s" % (f)))
 181             fp = Fingerprint()
 182             fp.fingerprint = f
 183             fp.keyring_id = keyring.keyring_id
 184             if newuid:
 185                 fp.uid_id = newuid
 186
 187             fp.binary_acl_id = keyring.default_binary_acl_id
 188             fp.source_acl_id = keyring.default_source_acl_id
 189             fp.default_binary_reject = keyring.default_binary_reject
 190             session.add(fp)
 191             session.flush()
 192
 193             for k in keyring.keyring_acl_map:
 194                 ba = BinaryACLMap()
 195                 ba.fingerprint_id = fp.fingerprint_id
 196                 ba.architecture_id = k.architecture_id
 197                 session.add(ba)
 198                 session.flush()
 199
 200         else:
 201             if newuid and olduid != newuid and olduid == -1:
 202                 changes.append((newuiduid, "Linked key: %s" % f))
 203                 changes.append((newuiduid, "  (formerly unowned)"))
 204                 session.execute("UPDATE fingerprint SET uid = :uid WHERE id = :fpr",
 205                                 {'uid': newuid, 'fpr': oldfid})
 206
 207             # Don't move a key from a keyring with a higher priority to a lower one
 208             if oldkid != keyring.keyring_id:
 209                 movekey = False
 210                 if oldkid == -1:
 211                     movekey = True
 212                 else:
 213                     try:
 214                         oldkeyring = session.query(Keyring).filter_by(keyring_id=oldkid).one()
 215                     except NotFoundError:
 216                         print "ERROR: Cannot find old keyring with id %s" % oldkid
 217                         sys.exit(1)
 218
 219                     if oldkeyring.priority < keyring.priority:
 220                         movekey = True
 221
 222                 # Only change the keyring if it won't result in a loss of permissions
 223                 if movekey:
 224                     session.execute("""DELETE FROM binary_acl_map WHERE fingerprint_id = :fprid""", {'fprid': oldfid})
 225
 226                     session.execute("""UPDATE fingerprint
 227                                           SET keyring = :keyring,
 228                                               source_acl_id = :source_acl_id,
 229                                               binary_acl_id = :binary_acl_id,
 230                                               binary_reject = :binary_reject
 231                                         WHERE id = :fpr""",
 232                                     {'keyring': keyring.keyring_id,
 233                                      'source_acl_id': keyring.default_source_acl_id,
 234                                      'binary_acl_id': keyring.default_binary_acl_id,
 235                                      'binary_reject': keyring.default_binary_reject,
 236                                      'fpr': oldfid})
 237
 238                     session.flush()
 239
 240                     for k in keyring.keyring_acl_map:
 241                         ba = BinaryACLMap()
 242                         ba.fingerprint_id = oldfid
 243                         ba.architecture_id = k.architecture_id
 244                         session.add(ba)
 245                         session.flush()
 246
 247                 else:
 248                     print "Key %s exists in both %s and %s keyrings. Not demoting." % (f,
 249                                                                                        oldkeyring.keyring_name,
 250                                                                                        keyring.keyring_name)
 251
 252     # All done!
 253     session.commit()
 254
 255     # Print a summary
 256     changesd = {}
 257     for (k, v) in changes:
 258         if k not in changesd:
 259             changesd[k] = ""
 260         changesd[k] += "    %s\n" % (v)
 261
 262     keys = changesd.keys()
 263     keys.sort()
 264     for k in keys:
 265         print "%s\n%s\n" % (k, changesd[k])
 266
 267 ################################################################################
 268
 269 if __name__ == '__main__':
 270     main()