make-secnet-sites

   1 #! /usr/bin/env python3
   2 #
   3 # This file is part of secnet.
   4 # See README for full list of copyright holders.
   5 #
   6 # secnet is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # secnet is distributed in the hope that it will be useful, but
  12 # WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # version 3 along with secnet; if not, see
  18 # https://www.gnu.org/licenses/gpl.html.
  19
  20 """VPN sites file manipulation.
  21
  22 This program enables VPN site descriptions to be submitted for
  23 inclusion in a central database, and allows the resulting database to
  24 be turned into a secnet configuration file.
  25
  26 A database file can be turned into a secnet configuration file simply:
  27 make-secnet-sites.py [infile [outfile]]
  28
  29 It would be wise to run secnet with the "--just-check-config" option
  30 before installing the output on a live system.
  31
  32 The program expects to be invoked via userv to manage the database; it
  33 relies on the USERV_USER and USERV_GROUP environment variables. The
  34 command line arguments for this invocation are:
  35
  36 make-secnet-sites.py -u header-filename groupfiles-directory output-file \
  37   group
  38
  39 All but the last argument are expected to be set by userv; the 'group'
  40 argument is provided by the user. A suitable userv configuration file
  41 fragment is:
  42
  43 reset
  44 no-disconnect-hup
  45 no-suppress-args
  46 cd ~/secnet/sites-test/
  47 execute ~/secnet/make-secnet-sites.py -u vpnheader groupfiles sites
  48
  49 This program is part of secnet.
  50
  51 """
  52
  53 from __future__ import print_function
  54 from __future__ import unicode_literals
  55 from builtins import int
  56
  57 import string
  58 import time
  59 import sys
  60 import os
  61 import getopt
  62 import re
  63 import argparse
  64 import math
  65
  66 import ipaddress
  67
  68 # entry 0 is "near the executable", or maybe from PYTHONPATH=.,
  69 # which we don't want to preempt
  70 sys.path.insert(1,"/usr/local/share/secnet")
  71 sys.path.insert(1,"/usr/share/secnet")
  72 import ipaddrset
  73 import base91
  74
  75 from argparseactionnoyes import ActionNoYes
  76
  77 VERSION="0.1.18"
  78
  79 max_version = 1
  80
  81 from sys import version_info
  82 if version_info.major == 2:  # for python2
  83     import codecs
  84     sys.stdin = codecs.getreader('utf-8')(sys.stdin)
  85     sys.stdout = codecs.getwriter('utf-8')(sys.stdout)
  86     import io
  87     open=lambda f,m='r': io.open(f,m,encoding='utf-8')
  88
  89 max={'rsa_bits':8200,'name':33,'dh_bits':8200}
  90
  91 def debugrepr(*args):
  92         if debug_level > 0:
  93                 print(repr(args), file=sys.stderr)
  94
  95 def base91s_encode(bindata):
  96         return base91.encode(bindata).replace('"',"-")
  97
  98 def base91s_decode(string):
  99         return base91.decode(string.replace("-",'"'))
 100
 101 class Tainted:
 102         def __init__(self,s,tline=None,tfile=None):
 103                 self._s=s
 104                 self._ok=None
 105                 self._line=line if tline is None else tline
 106                 self._file=file if tfile is None else tfile
 107         def __eq__(self,e):
 108                 return self._s==e
 109         def __ne__(self,e):
 110                 # for Python2
 111                 return not self.__eq__(e)
 112         def __str__(self):
 113                 raise RuntimeError('direct use of Tainted value')
 114         def __repr__(self):
 115                 return 'Tainted(%s)' % repr(self._s)
 116
 117         def _bad(self,what,why):
 118                 assert(self._ok is not True)
 119                 self._ok=False
 120                 complain('bad parameter: %s: %s' % (what, why))
 121                 return False
 122
 123         def _max_ok(self,what,maxlen):
 124                 if len(self._s) > maxlen:
 125                         return self._bad(what,'too long (max %d)' % maxlen)
 126                 return True
 127
 128         def _re_ok(self,bad,what,maxlen=None):
 129                 if maxlen is None: maxlen=max[what]
 130                 self._max_ok(what,maxlen)
 131                 if self._ok is False: return False
 132                 if bad.search(self._s):
 133                         #print(repr(self), file=sys.stderr)
 134                         return self._bad(what,'bad syntax')
 135                 return True
 136
 137         def _rtnval(self, is_ok, ifgood, ifbad=''):
 138                 if is_ok:
 139                         assert(self._ok is not False)
 140                         self._ok=True
 141                         return ifgood
 142                 else:
 143                         assert(self._ok is not True)
 144                         self._ok=False
 145                         return ifbad
 146
 147         def _rtn(self, is_ok, ifbad=''):
 148                 return self._rtnval(is_ok, self._s, ifbad)
 149
 150         def raw(self):
 151                 return self._s
 152         def raw_mark_ok(self):
 153                 # caller promises to throw if syntax was dangeorus
 154                 return self._rtn(True)
 155
 156         def output(self):
 157                 if self._ok is False: return ''
 158                 if self._ok is True: return self._s
 159                 print('%s:%d: unchecked/unknown additional data "%s"' %
 160                       (self._file,self._line,self._s),
 161                       file=sys.stderr)
 162                 sys.exit(1)
 163
 164         bad_name=re.compile(r'^[^a-zA-Z]|[^-_0-9a-zA-Z]')
 165         # secnet accepts _ at start of names, but we reserve that
 166         bad_name_counter=0
 167         def name(self,what='name'):
 168                 ok=self._re_ok(Tainted.bad_name,what)
 169                 return self._rtn(ok,
 170                                  '_line%d_%s' % (self._line, id(self)))
 171
 172         def keyword(self):
 173                 ok=self._s in keywords or self._s in levels
 174                 if not ok:
 175                         complain('unknown keyword %s' % self._s)
 176                 return self._rtn(ok)
 177
 178         bad_hex=re.compile(r'[^0-9a-fA-F]')
 179         def bignum_16(self,kind,what):
 180                 maxlen=(max[kind+'_bits']+3)/4
 181                 ok=self._re_ok(Tainted.bad_hex,what,maxlen)
 182                 return self._rtn(ok)
 183
 184         bad_num=re.compile(r'[^0-9]')
 185         def bignum_10(self,kind,what):
 186                 maxlen=math.ceil(max[kind+'_bits'] / math.log10(2))
 187                 ok=self._re_ok(Tainted.bad_num,what,maxlen)
 188                 return self._rtn(ok)
 189
 190         def number(self,minn,maxx,what='number'):
 191                 # not for bignums
 192                 ok=self._re_ok(Tainted.bad_num,what,10)
 193                 if ok:
 194                         v=int(self._s)
 195                         if v<minn or v>maxx:
 196                                 ok=self._bad(what,'out of range %d..%d'
 197                                              % (minn,maxx))
 198                 return self._rtnval(ok,v,minn)
 199
 200         def hexid(self,byteslen,what):
 201                 ok=self._re_ok(Tainted.bad_hex,what,byteslen*2)
 202                 if ok:
 203                         if len(self._s) < byteslen*2:
 204                                 ok=self._bad(what,'too short')
 205                 return self._rtn(ok,ifbad='00'*byteslen)
 206
 207         bad_host=re.compile(r'[^-\][_.:0-9a-zA-Z]')
 208         # We permit _ so we can refer to special non-host domains
 209         # which have A and AAAA RRs.  This is a crude check and we may
 210         # still produce config files with syntactically invalid
 211         # domains or addresses, but that is OK.
 212         def host(self):
 213                 ok=self._re_ok(Tainted.bad_host,'host/address',255)
 214                 return self._rtn(ok)
 215
 216         bad_email=re.compile(r'[^-._0-9a-z@!$%^&*=+~/]')
 217         # ^ This does not accept all valid email addresses.  That's
 218         # not really possible with this input syntax.  It accepts
 219         # all ones that don't require quoting anywhere in email
 220         # protocols (and also accepts some invalid ones).
 221         def email(self):
 222                 ok=self._re_ok(Tainted.bad_email,'email address',1023)
 223                 return self._rtn(ok)
 224
 225         bad_groupname=re.compile(r'^[^_A-Za-z]|[^-+_0-9A-Za-z]')
 226         def groupname(self):
 227                 ok=self._re_ok(Tainted.bad_groupname,'group name',64)
 228                 return self._rtn(ok)
 229
 230         bad_base91=re.compile(r'[^!-~]|[\'\"\\]')
 231         def base91(self,what='base91'):
 232                 ok=self._re_ok(Tainted.bad_base91,what,4096)
 233                 return self._rtn(ok)
 234
 235 class ArgActionLambda(argparse.Action):
 236         def __init__(self, fn, **kwargs):
 237                 self.fn=fn
 238                 argparse.Action.__init__(self,**kwargs)
 239         def __call__(self,ap,ns,values,option_string):
 240                 self.fn(values,ns,ap,option_string)
 241
 242 def parse_args():
 243         global service
 244         global inputfile
 245         global header
 246         global groupfiledir
 247         global sitesfile
 248         global outputfile
 249         global group
 250         global user
 251         global of
 252         global prefix
 253         global key_prefix
 254         global debug_level
 255         global output_version
 256
 257         ap = argparse.ArgumentParser(description='process secnet sites files')
 258         ap.add_argument('--userv', '-u', action='store_true',
 259                         help='userv service fragment update mode')
 260         ap.add_argument('--conf-key-prefix', action=ActionNoYes,
 261                         default=True,
 262                  help='prefix conf file key names derived from sites data')
 263         ap.add_argument('--output-version', nargs=1, type=int,
 264                         help='sites file output version',
 265                         default=[max_version])
 266         ap.add_argument('--prefix', '-P', nargs=1,
 267                         help='set prefix')
 268         ap.add_argument('--debug', '-D', action='count', default=0)
 269         ap.add_argument('arg',nargs=argparse.REMAINDER)
 270         av = ap.parse_args()
 271         debug_level = av.debug
 272         debugrepr('av',av)
 273         service = 1 if av.userv else 0
 274         prefix = '' if av.prefix is None else av.prefix[0]
 275         key_prefix = av.conf_key_prefix
 276         output_version = av.output_version[0]
 277         if service:
 278                 if len(av.arg)!=4:
 279                         print("Wrong number of arguments")
 280                         sys.exit(1)
 281                 (header, groupfiledir, sitesfile, group) = av.arg
 282                 group = Tainted(group,0,'command line')
 283                 # untrusted argument from caller
 284                 if "USERV_USER" not in os.environ:
 285                         print("Environment variable USERV_USER not found")
 286                         sys.exit(1)
 287                 user=os.environ["USERV_USER"]
 288                 # Check that group is in USERV_GROUP
 289                 if "USERV_GROUP" not in os.environ:
 290                         print("Environment variable USERV_GROUP not found")
 291                         sys.exit(1)
 292                 ugs=os.environ["USERV_GROUP"]
 293                 ok=0
 294                 for i in ugs.split():
 295                         if group==i: ok=1
 296                 if not ok:
 297                         print("caller not in group %s"%group)
 298                         sys.exit(1)
 299         else:
 300                 if len(av.arg)>3:
 301                         print("Too many arguments")
 302                         sys.exit(1)
 303                 (inputfile, outputfile) = (av.arg + [None]*2)[0:2]
 304
 305 parse_args()
 306
 307 # Classes describing possible datatypes in the configuration file
 308
 309 class basetype:
 310         "Common protocol for configuration types."
 311         def add(self,obj,w):
 312                 complain("%s %s already has property %s defined"%
 313                         (obj.type,obj.name,w[0].raw()))
 314         def forsites(self,version,copy,fs):
 315                 return copy
 316
 317 class conflist:
 318         "A list of some kind of configuration type."
 319         def __init__(self,subtype,w):
 320                 self.subtype=subtype
 321                 self.list=[subtype(w)]
 322         def add(self,obj,w):
 323                 self.list.append(self.subtype(w))
 324         def __str__(self):
 325                 return ', '.join(map(str, self.list))
 326         def forsites(self,version,copy,fs):
 327                 most_recent=self.list[len(self.list)-1]
 328                 return most_recent.forsites(version,copy,fs)
 329 def listof(subtype):
 330         return lambda w: conflist(subtype, w)
 331
 332 class single_ipaddr (basetype):
 333         "An IP address"
 334         def __init__(self,w):
 335                 self.addr=ipaddress.ip_address(w[1].raw_mark_ok())
 336         def __str__(self):
 337                 return '"%s"'%self.addr
 338
 339 class networks (basetype):
 340         "A set of IP addresses specified as a list of networks"
 341         def __init__(self,w):
 342                 self.set=ipaddrset.IPAddressSet()
 343                 for i in w[1:]:
 344                         x=ipaddress.ip_network(i.raw_mark_ok(),strict=True)
 345                         self.set.append([x])
 346         def __str__(self):
 347                 return ",".join(map((lambda n: '"%s"'%n), self.set.networks()))
 348
 349 class dhgroup (basetype):
 350         "A Diffie-Hellman group"
 351         def __init__(self,w):
 352                 self.mod=w[1].bignum_16('dh','dh mod')
 353                 self.gen=w[2].bignum_16('dh','dh gen')
 354         def __str__(self):
 355                 return 'diffie-hellman("%s","%s")'%(self.mod,self.gen)
 356
 357 class hash (basetype):
 358         "A choice of hash function"
 359         def __init__(self,w):
 360                 hname=w[1]
 361                 self.ht=hname.raw()
 362                 if (self.ht!='md5' and self.ht!='sha1'):
 363                         complain("unknown hash type %s"%(self.ht))
 364                         self.ht=None
 365                 else:
 366                         hname.raw_mark_ok()
 367         def __str__(self):
 368                 return '%s'%(self.ht)
 369
 370 class email (basetype):
 371         "An email address"
 372         def __init__(self,w):
 373                 self.addr=w[1].email()
 374         def __str__(self):
 375                 return '<%s>'%(self.addr)
 376
 377 class boolean (basetype):
 378         "A boolean"
 379         def __init__(self,w):
 380                 v=w[1]
 381                 if re.match('[TtYy1]',v.raw()):
 382                         self.b=True
 383                         v.raw_mark_ok()
 384                 elif re.match('[FfNn0]',v.raw()):
 385                         self.b=False
 386                         v.raw_mark_ok()
 387                 else:
 388                         complain("invalid boolean value");
 389         def __str__(self):
 390                 return ['False','True'][self.b]
 391
 392 class num (basetype):
 393         "A decimal number"
 394         def __init__(self,w):
 395                 self.n=w[1].number(0,0x7fffffff)
 396         def __str__(self):
 397                 return '%d'%(self.n)
 398
 399 class serial (basetype):
 400         def __init__(self,w):
 401                 self.i=w[1].hexid(4,'serial')
 402         def __str__(self):
 403                 return self.i
 404         def forsites(self,version,copy,fs):
 405                 if version < 2: return []
 406                 return copy
 407
 408 class address (basetype):
 409         "A DNS name and UDP port number"
 410         def __init__(self,w):
 411                 self.adr=w[1].host()
 412                 self.port=w[2].number(1,65536,'port')
 413         def __str__(self):
 414                 return '"%s"; port %d'%(self.adr,self.port)
 415
 416 class pubkey (basetype):
 417         "Some kind of publie key"
 418
 419 class rsakey (pubkey):
 420         "An RSA public key"
 421         def __init__(self,w):
 422                 self.l=w[1].number(0,max['rsa_bits'],'rsa len')
 423                 self.e=w[2].bignum_10('rsa','rsa e')
 424                 self.n=w[3].bignum_10('rsa','rsa n')
 425                 if len(w) >= 5: w[4].email()
 426         def __str__(self):
 427                 return 'rsa-public("%s","%s")'%(self.e,self.n)
 428
 429 def somepubkey(w):
 430         if w[0]=='pubkey':
 431                 return rsakey(w)
 432         else:
 433                 assert(False)
 434
 435 # Possible properties of configuration nodes
 436 keywords={
 437  'contact':(email,"Contact address"),
 438  'dh':(dhgroup,"Diffie-Hellman group"),
 439  'hash':(hash,"Hash function"),
 440  'key-lifetime':(num,"Maximum key lifetime (ms)"),
 441  'setup-timeout':(num,"Key setup timeout (ms)"),
 442  'setup-retries':(num,"Maximum key setup packet retries"),
 443  'wait-time':(num,"Time to wait after unsuccessful key setup (ms)"),
 444  'renegotiate-time':(num,"Time after key setup to begin renegotiation (ms)"),
 445  'restrict-nets':(networks,"Allowable networks"),
 446  'networks':(networks,"Claimed networks"),
 447  'pubkey':(listof(somepubkey),"RSA public site key"),
 448  'peer':(single_ipaddr,"Tunnel peer IP address"),
 449  'address':(address,"External contact address and port"),
 450  'mobile':(boolean,"Site is mobile"),
 451 }
 452
 453 def sp(name,value):
 454         "Simply output a property - the default case"
 455         return "%s %s;\n"%(name,value)
 456
 457 # All levels support these properties
 458 global_properties={
 459         'contact':(lambda name,value:"# Contact email address: %s\n"%(value)),
 460         'dh':sp,
 461         'hash':sp,
 462         'key-lifetime':sp,
 463         'setup-timeout':sp,
 464         'setup-retries':sp,
 465         'wait-time':sp,
 466         'renegotiate-time':sp,
 467         'restrict-nets':(lambda name,value:"# restrict-nets %s\n"%value),
 468 }
 469
 470 class level:
 471         "A level in the configuration hierarchy"
 472         depth=0
 473         leaf=0
 474         allow_properties={}
 475         require_properties={}
 476         def __init__(self,w):
 477                 self.type=w[0].keyword()
 478                 self.name=w[1].name()
 479                 self.properties={}
 480                 self.children={}
 481         def indent(self,w,t):
 482                 w.write("                 "[:t])
 483         def prop_out(self,n):
 484                 return self.allow_properties[n](n,str(self.properties[n]))
 485         def output_props(self,w,ind):
 486                 for i in sorted(self.properties.keys()):
 487                         if self.allow_properties[i]:
 488                                 self.indent(w,ind)
 489                                 w.write("%s"%self.prop_out(i))
 490         def kname(self):
 491                 return ((self.type[0].upper() if key_prefix else '')
 492                         + self.name)
 493         def output_data(self,w,path):
 494                 ind = 2*len(path)
 495                 self.indent(w,ind)
 496                 w.write("%s {\n"%(self.kname()))
 497                 self.output_props(w,ind+2)
 498                 if self.depth==1: w.write("\n");
 499                 for k in sorted(self.children.keys()):
 500                         c=self.children[k]
 501                         c.output_data(w,path+(c,))
 502                 self.indent(w,ind)
 503                 w.write("};\n")
 504
 505 class vpnlevel(level):
 506         "VPN level in the configuration hierarchy"
 507         depth=1
 508         leaf=0
 509         type="vpn"
 510         allow_properties=global_properties.copy()
 511         require_properties={
 512          'contact':"VPN admin contact address"
 513         }
 514         def __init__(self,w):
 515                 level.__init__(self,w)
 516         def output_vpnflat(self,w,path):
 517                 "Output flattened list of site names for this VPN"
 518                 ind=2*(len(path)+1)
 519                 self.indent(w,ind)
 520                 w.write("%s {\n"%(self.kname()))
 521                 for i in self.children.keys():
 522                         self.children[i].output_vpnflat(w,path+(self,))
 523                 w.write("\n")
 524                 self.indent(w,ind+2)
 525                 w.write("all-sites %s;\n"%
 526                         ','.join(map(lambda i: i.kname(),
 527                                      self.children.values())))
 528                 self.indent(w,ind)
 529                 w.write("};\n")
 530
 531 class locationlevel(level):
 532         "Location level in the configuration hierarchy"
 533         depth=2
 534         leaf=0
 535         type="location"
 536         allow_properties=global_properties.copy()
 537         require_properties={
 538          'contact':"Location admin contact address",
 539         }
 540         def __init__(self,w):
 541                 level.__init__(self,w)
 542                 self.group=w[2].groupname()
 543         def output_vpnflat(self,w,path):
 544                 ind=2*(len(path)+1)
 545                 self.indent(w,ind)
 546                 # The "path=path,self=self" abomination below exists because
 547                 # Python didn't support nested_scopes until version 2.1
 548                 #
 549                 #"/"+self.name+"/"+i
 550                 w.write("%s %s;\n"%(self.kname(),','.join(
 551                         map(lambda x,path=path,self=self:
 552                             '/'.join([prefix+"vpn-data"] + list(map(
 553                                     lambda i: i.kname(),
 554                                     path+(self,x)))),
 555                             self.children.values()))))
 556
 557 class sitelevel(level):
 558         "Site level (i.e. a leafnode) in the configuration hierarchy"
 559         depth=3
 560         leaf=1
 561         type="site"
 562         allow_properties=global_properties.copy()
 563         allow_properties.update({
 564          'address':sp,
 565          'networks':None,
 566          'peer':None,
 567          'pubkey':None,
 568          'mobile':sp,
 569         })
 570         require_properties={
 571          'dh':"Diffie-Hellman group",
 572          'contact':"Site admin contact address",
 573          'networks':"Networks claimed by the site",
 574          'hash':"hash function",
 575          'peer':"Gateway address of the site",
 576          'pubkey':"RSA public key of the site",
 577         }
 578         def __init__(self,w):
 579                 level.__init__(self,w)
 580         def output_data(self,w,path):
 581                 ind=2*len(path)
 582                 np='/'.join(map(lambda i: i.name, path))
 583                 self.indent(w,ind)
 584                 w.write("%s {\n"%(self.kname()))
 585                 self.indent(w,ind+2)
 586                 w.write("name \"%s\";\n"%(np,))
 587                 self.indent(w,ind+2)
 588                 w.write("key %s;\n"%str(self.properties["pubkey"].list[0]))
 589                 self.output_props(w,ind+2)
 590                 self.indent(w,ind+2)
 591                 w.write("link netlink {\n");
 592                 self.indent(w,ind+4)
 593                 w.write("routes %s;\n"%str(self.properties["networks"]))
 594                 self.indent(w,ind+4)
 595                 w.write("ptp-address %s;\n"%str(self.properties["peer"]))
 596                 self.indent(w,ind+2)
 597                 w.write("};\n")
 598                 self.indent(w,ind)
 599                 w.write("};\n")
 600
 601 # Levels in the configuration file
 602 # (depth,properties)
 603 levels={'vpn':vpnlevel, 'location':locationlevel, 'site':sitelevel}
 604
 605 def complain(msg):
 606         "Complain about a particular input line"
 607         moan(("%s line %d: "%(file,line))+msg)
 608 def moan(msg):
 609         "Complain about something in general"
 610         global complaints
 611         print(msg);
 612         if complaints is None: sys.exit(1)
 613         complaints=complaints+1
 614
 615 class UntaintedRoot():
 616         def __init__(self,s): self._s=s
 617         def name(self): return self._s
 618         def keyword(self): return self._s
 619
 620 root=level([UntaintedRoot(x) for x in ['root','root']])
 621 # All vpns are children of this node
 622 obstack=[root]
 623 allow_defs=0   # Level above which new definitions are permitted
 624
 625 def set_property(obj,w):
 626         "Set a property on a configuration node"
 627         prop=w[0]
 628         propname=prop.raw_mark_ok()
 629         kw=keywords[propname]
 630         if len(kw) >= 3: propname=kw[2] # for aliases
 631         if propname in obj.properties:
 632                 obj.properties[propname].add(obj,w)
 633         else:
 634                 obj.properties[propname]=kw[0](w)
 635         return obj.properties[propname]
 636
 637 class FilterState:
 638         def __init__(self):
 639                 self.reset()
 640         def reset(self):
 641                 # called when we enter a new node,
 642                 # in particular, at the start of each site
 643                 pass
 644
 645 def pline(il,filterstate,allow_include=False):
 646         "Process a configuration file line"
 647         global allow_defs, obstack, root
 648         w=il.rstrip('\n').split()
 649         if len(w)==0: return ['']
 650         w=list([Tainted(x) for x in w])
 651         keyword=w[0]
 652         current=obstack[len(obstack)-1]
 653         copyout_core=lambda: ' '.join([ww.output() for ww in w])
 654         indent='    '*len(obstack)
 655         copyout=lambda: [indent + copyout_core() + '\n']
 656         if keyword=='end-definitions':
 657                 keyword.raw_mark_ok()
 658                 allow_defs=sitelevel.depth
 659                 obstack=[root]
 660                 return copyout()
 661         if keyword=='include':
 662                 if not allow_include:
 663                         complain("include not permitted here")
 664                         return []
 665                 if len(w) != 2:
 666                         complain("include requires one argument")
 667                         return []
 668                 newfile=os.path.join(os.path.dirname(file),w[1].raw_mark_ok())
 669                 # ^ user of "include" is trusted so raw_mark_ok is good
 670                 return pfilepath(newfile,allow_include=allow_include)
 671         if keyword.raw() in levels:
 672                 # We may go up any number of levels, but only down by one
 673                 newdepth=levels[keyword.raw_mark_ok()].depth
 674                 currentdepth=len(obstack) # actually +1...
 675                 if newdepth<=currentdepth:
 676                         obstack=obstack[:newdepth]
 677                 if newdepth>currentdepth:
 678                         complain("May not go from level %d to level %d"%
 679                                 (currentdepth-1,newdepth))
 680                 # See if it's a new one (and whether that's permitted)
 681                 # or an existing one
 682                 current=obstack[len(obstack)-1]
 683                 tname=w[1].name()
 684                 if tname in current.children:
 685                         # Not new
 686                         current=current.children[tname]
 687                         if service and group and current.depth==2:
 688                                 if group!=current.group:
 689                                         complain("Incorrect group!")
 690                                 w[2].groupname()
 691                 else:
 692                         # New
 693                         # Ignore depth check for now
 694                         nl=levels[keyword.raw()](w)
 695                         if nl.depth<allow_defs:
 696                                 complain("New definitions not allowed at "
 697                                         "level %d"%nl.depth)
 698                                 # we risk crashing if we continue
 699                                 sys.exit(1)
 700                         current.children[tname]=nl
 701                         current=nl
 702                 filterstate.reset()
 703                 obstack.append(current)
 704                 return copyout()
 705         if keyword.raw() not in current.allow_properties:
 706                 complain("Property %s not allowed at %s level"%
 707                         (keyword.raw(),current.type))
 708                 return []
 709         elif current.depth == vpnlevel.depth < allow_defs:
 710                 complain("Not allowed to set VPN properties here")
 711                 return []
 712         else:
 713                 prop=set_property(current,w)
 714                 out=[copyout_core()]
 715                 out=prop.forsites(output_version,out,filterstate)
 716                 if len(out)==0: return [indent + '#', copyout_core(), '\n']
 717                 return [indent + ' '.join(out) + '\n']
 718
 719         complain("unknown keyword '%s'"%(keyword.raw()))
 720
 721 def pfilepath(pathname,allow_include=False):
 722         f=open(pathname)
 723         outlines=pfile(pathname,f.readlines(),allow_include=allow_include)
 724         f.close()
 725         return outlines
 726
 727 def pfile(name,lines,allow_include=False):
 728         "Process a file"
 729         global file,line
 730         file=name
 731         line=0
 732         outlines=[]
 733         filterstate = FilterState()
 734         for i in lines:
 735                 line=line+1
 736                 if (i[0]=='#'): continue
 737                 outlines += pline(i,filterstate,allow_include=allow_include)
 738         return outlines
 739
 740 def outputsites(w):
 741         "Output include file for secnet configuration"
 742         w.write("# secnet sites file autogenerated by make-secnet-sites "
 743                 +"version %s\n"%VERSION)
 744         w.write("# %s\n"%time.asctime(time.localtime(time.time())))
 745         w.write("# Command line: %s\n\n"%' '.join(sys.argv))
 746
 747         # Raw VPN data section of file
 748         w.write(prefix+"vpn-data {\n")
 749         for i in root.children.values():
 750                 i.output_data(w,(i,))
 751         w.write("};\n")
 752
 753         # Per-VPN flattened lists
 754         w.write(prefix+"vpn {\n")
 755         for i in root.children.values():
 756                 i.output_vpnflat(w,())
 757         w.write("};\n")
 758
 759         # Flattened list of sites
 760         w.write(prefix+"all-sites %s;\n"%",".join(
 761                 map(lambda x:"%svpn/%s/all-sites"%(prefix,x.kname()),
 762                         root.children.values())))
 763
 764 line=0
 765 file=None
 766 complaints=0
 767
 768 # Sanity check section
 769 # Delete nodes where leaf=0 that have no children
 770
 771 def live(n):
 772         "Number of leafnodes below node n"
 773         if n.leaf: return 1
 774         for i in n.children.keys():
 775                 if live(n.children[i]): return 1
 776         return 0
 777 def delempty(n):
 778         "Delete nodes that have no leafnode children"
 779         for i in list(n.children.keys()):
 780                 delempty(n.children[i])
 781                 if not live(n.children[i]):
 782                         del n.children[i]
 783
 784 # Check that all constraints are met (as far as I can tell
 785 # restrict-nets/networks/peer are the only special cases)
 786
 787 def checkconstraints(n,p,ra):
 788         new_p=p.copy()
 789         new_p.update(n.properties)
 790         for i in n.require_properties.keys():
 791                 if i not in new_p:
 792                         moan("%s %s is missing property %s"%
 793                                 (n.type,n.name,i))
 794         for i in new_p.keys():
 795                 if i not in n.allow_properties:
 796                         moan("%s %s has forbidden property %s"%
 797                                 (n.type,n.name,i))
 798         # Check address range restrictions
 799         if "restrict-nets" in n.properties:
 800                 new_ra=ra.intersection(n.properties["restrict-nets"].set)
 801         else:
 802                 new_ra=ra
 803         if "networks" in n.properties:
 804                 if not n.properties["networks"].set <= new_ra:
 805                         moan("%s %s networks out of bounds"%(n.type,n.name))
 806                 if "peer" in n.properties:
 807                         if not n.properties["networks"].set.contains(
 808                                 n.properties["peer"].addr):
 809                                 moan("%s %s peer not in networks"%(n.type,n.name))
 810         for i in n.children.keys():
 811                 checkconstraints(n.children[i],new_p,new_ra)
 812
 813 if service:
 814         headerinput=pfilepath(header,allow_include=True)
 815         userinput=sys.stdin.readlines()
 816         pfile("user input",userinput)
 817 else:
 818         if inputfile is None:
 819                 pfile("stdin",sys.stdin.readlines())
 820         else:
 821                 pfilepath(inputfile)
 822
 823 delempty(root)
 824 checkconstraints(root,{},ipaddrset.complete_set())
 825
 826 if complaints>0:
 827         if complaints==1: print("There was 1 problem.")
 828         else: print("There were %d problems."%(complaints))
 829         sys.exit(1)
 830 complaints=None # arranges to crash if we complain later
 831
 832 if service:
 833         # Put the user's input into their group file, and rebuild the main
 834         # sites file
 835         f=open(groupfiledir+"/T"+group.groupname(),'w')
 836         f.write("# Section submitted by user %s, %s\n"%
 837                 (user,time.asctime(time.localtime(time.time()))))
 838         f.write("# Checked by make-secnet-sites version %s\n\n"%VERSION)
 839         for i in userinput: f.write(i)
 840         f.write("\n")
 841         f.close()
 842         os.rename(groupfiledir+"/T"+group.groupname(),
 843                   groupfiledir+"/R"+group.groupname())
 844         f=open(sitesfile+"-tmp",'w')
 845         f.write("# sites file autogenerated by make-secnet-sites\n")
 846         f.write("# generated %s, invoked by %s\n"%
 847                 (time.asctime(time.localtime(time.time())),user))
 848         f.write("# use make-secnet-sites to turn this file into a\n")
 849         f.write("# valid /etc/secnet/sites.conf file\n\n")
 850         for i in headerinput: f.write(i)
 851         files=os.listdir(groupfiledir)
 852         for i in files:
 853                 if i[0]=='R':
 854                         j=open(groupfiledir+"/"+i)
 855                         f.write(j.read())
 856                         j.close()
 857         f.write("# end of sites file\n")
 858         f.close()
 859         os.rename(sitesfile+"-tmp",sitesfile)
 860 else:
 861         if outputfile is None:
 862                 of=sys.stdout
 863         else:
 864                 tmp_outputfile=outputfile+'~tmp~'
 865                 of=open(tmp_outputfile,'w')
 866         outputsites(of)
 867         if outputfile is not None:
 868                 os.rename(tmp_outputfile,outputfile)