mdw@git.distorted.org.uk Git - catacomb-python/blob - pwsafe

   1 #! /usr/bin/python
   2 ### -*-python-*-
   3 ###
   4 ### Tool for maintaining a secure-ish password database
   5 ###
   6 ### (c) 2005 Straylight/Edgeware
   7 ###
   8
   9 ###----- Licensing notice ---------------------------------------------------
  10 ###
  11 ### This file is part of the Python interface to Catacomb.
  12 ###
  13 ### Catacomb/Python is free software; you can redistribute it and/or modify
  14 ### it under the terms of the GNU General Public License as published by
  15 ### the Free Software Foundation; either version 2 of the License, or
  16 ### (at your option) any later version.
  17 ###
  18 ### Catacomb/Python is distributed in the hope that it will be useful,
  19 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ### GNU General Public License for more details.
  22 ###
  23 ### You should have received a copy of the GNU General Public License
  24 ### along with Catacomb/Python; if not, write to the Free Software Foundation,
  25 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26
  27 ###---------------------------------------------------------------------------
  28 ### Imported modules.
  29
  30 from __future__ import with_statement
  31
  32 from os import environ
  33 from sys import argv, exit, stdin, stdout, stderr
  34 from getopt import getopt, GetoptError
  35 from fnmatch import fnmatch
  36 import re
  37
  38 import catacomb as C
  39 from catacomb.pwsafe import *
  40
  41 ###--------------------------------------------------------------------------
  42 ### Utilities.
  43
  44 ## The program name.
  45 prog = re.sub(r'^.*[/\\]', '', argv[0])
  46
  47 def moan(msg):
  48   """Issue a warning message MSG."""
  49   print >>stderr, '%s: %s' % (prog, msg)
  50
  51 def die(msg):
  52   """Report MSG as a fatal error, and exit."""
  53   moan(msg)
  54   exit(1)
  55
  56 ###--------------------------------------------------------------------------
  57 ### Subcommand implementations.
  58
  59 def cmd_create(av):
  60
  61   ## Default crypto-primitive selections.
  62   cipher = 'blowfish-cbc'
  63   hash = 'rmd160'
  64   mac = None
  65
  66   ## Parse the options.
  67   try:
  68     opts, args = getopt(av, 'c:d:h:m:',
  69                         ['cipher=', 'database=', 'mac=', 'hash='])
  70   except GetoptError:
  71     return 1
  72   dbty = 'gdbm'
  73   for o, a in opts:
  74     if o in ('-c', '--cipher'): cipher = a
  75     elif o in ('-m', '--mac'): mac = a
  76     elif o in ('-h', '--hash'): hash = a
  77     elif o in ('-d', '--database'): dbty = a
  78     else: raise 'Barf!'
  79   if len(args) > 2: return 1
  80   if len(args) >= 1: tag = args[0]
  81   else: tag = 'pwsafe'
  82
  83   ## Set up the database.
  84   if mac is None: mac = hash + '-hmac'
  85   try: dbcls = StorageBackend.byname(dbty)
  86   except KeyError: die("Unknown database backend `%s'" % dbty)
  87   PW.create(dbcls, file, tag,
  88             C.gcciphers[cipher], C.gchashes[hash], C.gcmacs[mac])
  89
  90 def cmd_changepp(av):
  91   if len(av) != 0: return 1
  92   with PW(file, writep = True) as pw: pw.changepp()
  93
  94 def cmd_find(av):
  95   if len(av) != 1: return 1
  96   with PW(file) as pw:
  97     try: print pw[av[0]]
  98     except KeyError, exc: die("Password `%s' not found" % exc.args[0])
  99
 100 def cmd_store(av):
 101   if len(av) < 1 or len(av) > 2: return 1
 102   tag = av[0]
 103   with PW(file, writep = True) as pw:
 104     if len(av) < 2:
 105       pp = C.getpass("Enter passphrase `%s': " % tag)
 106       vpp = C.getpass("Confirm passphrase `%s': " % tag)
 107       if pp != vpp: die("passphrases don't match")
 108     elif av[1] == '-':
 109       pp = stdin.readline().rstrip('\n')
 110     else:
 111       pp = av[1]
 112     pw[av[0]] = pp
 113
 114 def cmd_copy(av):
 115   if len(av) < 1 or len(av) > 2: return 1
 116   with PW(file) as pw_in:
 117     with PW(av[0], writep = True) as pw_out:
 118       if len(av) >= 3: pat = av[1]
 119       else: pat = None
 120       for k in pw_in:
 121         if pat is None or fnmatch(k, pat): pw_out[k] = pw_in[k]
 122
 123 def cmd_list(av):
 124   if len(av) > 1: return 1
 125   with PW(file) as pw:
 126     if len(av) >= 1: pat = av[0]
 127     else: pat = None
 128     for k in pw:
 129       if pat is None or fnmatch(k, pat): print k
 130
 131 def cmd_topixie(av):
 132   if len(av) > 2: return 1
 133   with PW(file) as pw:
 134     pix = C.Pixie()
 135     if len(av) == 0:
 136       for tag in pw: pix.set(tag, pw[tag])
 137     else:
 138       tag = av[0]
 139       if len(av) >= 2: pptag = av[1]
 140       else: pptag = av[0]
 141       pix.set(pptag, pw[tag])
 142
 143 def cmd_del(av):
 144   if len(av) != 1: return 1
 145   with PW(file, writep = True) as pw:
 146     tag = av[0]
 147     try: del pw[tag]
 148     except KeyError, exc: die("Password `%s' not found" % exc.args[0])
 149
 150 commands = { 'create': [cmd_create,
 151                         '[-c CIPHER] [-d DBTYPE] [-h HASH] [-m MAC] [PP-TAG]'],
 152              'find' : [cmd_find, 'LABEL'],
 153              'store' : [cmd_store, 'LABEL [VALUE]'],
 154              'list' : [cmd_list, '[GLOB-PATTERN]'],
 155              'changepp' : [cmd_changepp, ''],
 156              'copy' : [cmd_copy, 'DEST-FILE [GLOB-PATTERN]'],
 157              'to-pixie' : [cmd_topixie, '[TAG [PIXIE-TAG]]'],
 158              'delete' : [cmd_del, 'TAG']}
 159
 160 ###--------------------------------------------------------------------------
 161 ### Command-line handling and dispatch.
 162
 163 def version():
 164   print '%s 1.0.0' % prog
 165   print 'Backend types: %s' % \
 166       ' '.join([c.NAME for c in StorageBackend.classes()])
 167
 168 def usage(fp):
 169   print >>fp, 'Usage: %s COMMAND [ARGS...]' % prog
 170
 171 def help():
 172   version()
 173   print
 174   usage(stdout)
 175   print '''
 176 Maintains passwords or other short secrets securely.
 177
 178 Options:
 179
 180 -h, --help              Show this help text.
 181 -v, --version           Show program version number.
 182 -u, --usage             Show short usage message.
 183
 184 -f, --file=FILE         Where to find the password-safe file.
 185
 186 Commands provided:
 187 '''
 188   for c in sorted(commands):
 189     print '%s %s' % (c, commands[c][1])
 190
 191 ## Choose a default database file.
 192 if 'PWSAFE' in environ:
 193   file = environ['PWSAFE']
 194 else:
 195   file = '%s/.pwsafe' % environ['HOME']
 196
 197 ## Parse the command-line options.
 198 try:
 199   opts, argv = getopt(argv[1:], 'hvuf:',
 200                       ['help', 'version', 'usage', 'file='])
 201 except GetoptError:
 202   usage(stderr)
 203   exit(1)
 204 for o, a in opts:
 205   if o in ('-h', '--help'):
 206     help()
 207     exit(0)
 208   elif o in ('-v', '--version'):
 209     version()
 210     exit(0)
 211   elif o in ('-u', '--usage'):
 212     usage(stdout)
 213     exit(0)
 214   elif o in ('-f', '--file'):
 215     file = a
 216   else:
 217     raise 'Barf!'
 218 if len(argv) < 1:
 219   usage(stderr)
 220   exit(1)
 221
 222 ## Dispatch to a command handler.
 223 if argv[0] in commands:
 224   c = argv[0]
 225   argv = argv[1:]
 226 else:
 227   c = 'find'
 228 try:
 229   if commands[c][0](argv):
 230     print >>stderr, 'Usage: %s %s %s' % (prog, c, commands[c][1])
 231     exit(1)
 232 except DecryptError:
 233   die("decryption failure")
 234
 235 ###----- That's all, folks --------------------------------------------------