chiark / gitweb /
test-example: all-privkeys: Define, and indirect through, a variable
[secnet.git] / make-secnet-sites
index 1caf53dc3dfd919f5bd65cb59ebb787e6b99f968..9e4538b01e4f719ea3ece7ad6d1396dd53edd106 100755 (executable)
@@ -239,6 +239,57 @@ class ArgActionLambda(argparse.Action):
        def __call__(self,ap,ns,values,option_string):
                self.fn(values,ns,ap,option_string)
 
+class PkmBase():
+       def site_start(self,pubkeys_path):
+               self._pa=pubkeys_path
+               self._fs = FilterState()
+       def site_serial(self,serial): pass
+       def write_key(self,k): pass
+       def site_finish(self,confw): pass
+
+class PkmSingle(PkmBase):
+       opt = 'single'
+       help = 'write one public key per site to sites.conf'
+       def site_start(self,pubkeys_path):
+               PkmBase.site_start(self,pubkeys_path)
+               self._outk = []
+       def write_key(self,k):
+               if k.okforonlykey(output_version,self._fs):
+                       self._outk.append(k)
+       def site_finish(self,confw):
+               if len(self._outk) == 0:
+                       complain("site with no public key");
+               elif len(self._outk) != 1:
+                       debugrepr('outk ', self._outk)
+                       complain(
+ "site with multiple public keys, without --pubkeys-install (maybe --output-version=1 would help"
+                       )
+               else:
+                       confw.write("key %s;\n"%str(self._outk[0]))
+
+class PkmInstall(PkmBase):
+       opt = 'install'
+       help = 'install public keys in public key directory'
+       def site_start(self,pubkeys_path):
+               PkmBase.site_start(self,pubkeys_path)
+               self._pw=open(self._pa+'~tmp','w')
+       def site_serial(self,serial):
+               self._pw.write('serial %s\n' % serial)
+       def write_key(self,k):
+               wout=k.forpub(output_version,self._fs)
+               self._pw.write(' '.join(wout))
+               self._pw.write('\n')
+       def site_finish(self,confw):
+               self._pw.close()
+               os.rename(self._pa+'~tmp',self._pa+'~update')
+               PkmElide.site_finish(self,confw)
+
+class PkmElide(PkmBase):
+       opt = 'elide'
+       help = 'no public keys in sites.conf output nor in directory'
+       def site_finish(self,confw):
+               confw.write("peer-keys \"%s\";\n"%self._pa);
+
 def parse_args():
        global service
        global inputfile
@@ -254,6 +305,7 @@ def parse_args():
        global debug_level
        global output_version
        global pubkeys_dir
+       global pubkeys_mode
 
        ap = argparse.ArgumentParser(description='process secnet sites files')
        ap.add_argument('--userv', '-u', action='store_true',
@@ -261,6 +313,14 @@ def parse_args():
        ap.add_argument('--conf-key-prefix', action=ActionNoYes,
                        default=True,
                 help='prefix conf file key names derived from sites data')
+       def add_pkm(how):
+               ap.add_argument('--pubkeys-'+how().opt, action=ArgActionLambda,
+                       nargs=0,
+                       fn=(lambda v,ns,*x: setattr(ns,'pkm',how)),
+                       help=how().help)
+       add_pkm(PkmInstall)
+       add_pkm(PkmSingle)
+       add_pkm(PkmElide)
        ap.add_argument('--pubkeys-dir',  nargs=1,
                        help='public key directory',
                        default=['/var/lib/secnet/pubkeys'])
@@ -279,6 +339,7 @@ def parse_args():
        key_prefix = av.conf_key_prefix
        output_version = av.output_version[0]
        pubkeys_dir = av.pubkeys_dir[0]
+       pubkeys_mode = getattr(av,'pkm',PkmSingle)
        if service:
                if len(av.arg)!=4:
                        print("Wrong number of arguments")
@@ -418,19 +479,25 @@ class address (basetype):
        def __str__(self):
                return '"%s"; port %d'%(self.adr,self.port)
 
-class pubkey (basetype):
+class inpub (basetype):
+       def forsites(self,version,xcopy,fs):
+               return self.forpub(version,fs)
+
+class pubkey (inpub):
        "Some kind of publie key"
        def __init__(self,w):
                self.a=w[1].name('algname')
                self.d=w[2].base91();
        def __str__(self):
                return 'make-public("%s","%s")'%(self.a,self.d)
-       def forsites(self,version,xcopy,fs):
+       def forpub(self,version,fs):
                if version < 2: return []
                return ['pub', self.a, self.d]
+       def okforonlykey(self,version,fs):
+               return len(self.forpub(version,fs)) != 0
 
 class rsakey (pubkey):
-       "An RSA public key"
+       "An old-style RSA public key"
        def __init__(self,w):
                self.l=w[1].number(0,max['rsa_bits'],'rsa len')
                self.e=w[2].bignum_10('rsa','rsa e')
@@ -447,10 +514,11 @@ class rsakey (pubkey):
                return 'rsa-public("%s","%s")'%(self.e,self.n)
                # this specialisation means we can generate files
                # compatible with old secnet executables
-       def forsites(self,version,xcopy,fs):
+       def forpub(self,version,fs):
                if version < 2:
+                       if fs.pkg != '00000000': return []
                        return ['pubkey', str(self.l), self.e, self.n]
-               return pubkey.forsites(self,version,xcopy,fs)
+               return pubkey.forpub(self,version,fs)
 
 class rsakey_newfmt(rsakey):
        "An old-style RSA public key in new-style sites format"
@@ -469,13 +537,33 @@ class rsakey_newfmt(rsakey):
                        complain('rsa1 key in new format has bad base91')
                #print(repr(w_inner), file=sys.stderr)
                rsakey.__init__(self,w_inner)
+
+class pubkey_group(inpub):
+       "Public key group introducer"
+       # appears in the site's list of keys mixed in with the keys
+       def __init__(self,w,fallback):
+               self.i=w[1].hexid(4,'pkg-id')
+               self.fallback=fallback
+       def forpub(self,version,fs):
+               fs.pkg=self.i
+               if version < 2: return []
+               return ['pkgf' if self.fallback else 'pkg', self.i]
+       def okforonlykey(self,version,fs):
+               self.forpub(version,fs)
+               return False
+       
 def somepubkey(w):
+       #print(repr(w), file=sys.stderr)
        if w[0]=='pubkey':
                return rsakey(w)
        elif w[0]=='pub' and w[1]=='rsa1':
                return rsakey_newfmt(w)
        elif w[0]=='pub':
                return pubkey(w)
+       elif w[0]=='pkg':
+               return pubkey_group(w,False)
+       elif w[0]=='pkgf':
+               return pubkey_group(w,True)
        else:
                assert(False)
 
@@ -491,8 +579,11 @@ keywords={
  'renegotiate-time':(num,"Time after key setup to begin renegotiation (ms)"),
  'restrict-nets':(networks,"Allowable networks"),
  'networks':(networks,"Claimed networks"),
+ 'serial':(serial,"public key set serial"),
+ 'pkg':(listof(somepubkey),"start of public key group",'pub'),
+ 'pkgf':(listof(somepubkey),"start of fallback public key group",'pub'),
  'pub':(listof(somepubkey),"new style public site key"),
- 'pubkey':(listof(somepubkey),"RSA public site key",'pub'),
+ 'pubkey':(listof(somepubkey),"Old-style RSA public site key",'pub'),
  'peer':(single_ipaddr,"Tunnel peer IP address"),
  'address':(address,"External contact address and port"),
  'mobile':(boolean,"Site is mobile"),
@@ -612,6 +703,9 @@ class sitelevel(level):
         'address':sp,
         'networks':None,
         'peer':None,
+         'serial':None,
+        'pkg':None,
+        'pkgf':None,
         'pub':None,
         'pubkey':None,
         'mobile':sp,
@@ -622,7 +716,6 @@ class sitelevel(level):
         'networks':"Networks claimed by the site",
         'hash':"hash function",
         'peer':"Gateway address of the site",
-        'pub':"public key of the site",
        }
        def mangle_name(self):
                return self.name.replace('/',',')
@@ -638,7 +731,19 @@ class sitelevel(level):
                self.indent(w,ind+2)
                w.write("name \"%s\";\n"%(np,))
                self.indent(w,ind+2)
-               w.write("key %s;\n"%str(self.properties["pub"].list[0]))
+
+               pkm = pubkeys_mode()
+               debugrepr('pkm ',pkm)
+               pkm.site_start(self.pubkeys_path())
+               if 'serial' in self.properties:
+                       pkm.site_serial(self.properties['serial'])
+
+               for k in self.properties["pub"].list:
+                       debugrepr('pubkeys ', k)
+                       pkm.write_key(k)
+
+               pkm.site_finish(w)
+
                self.output_props(w,ind+2)
                self.indent(w,ind+2)
                w.write("link netlink {\n");
@@ -693,7 +798,7 @@ class FilterState:
        def reset(self):
                # called when we enter a new node,
                # in particular, at the start of each site
-               pass
+               self.pkg = '00000000'
 
 def pline(il,filterstate,allow_include=False):
        "Process a configuration file line"