X-Git-Url: https://code.communitydata.science/nu-vpn-proxy.git/blobdiff_plain/ef2bfa6b56ccbf425ec9a2041ace3d5525ae1e9a..7e13b54cde944b15e2c48759b9e18e82d172b40f:/gp-saml-gui.py

diff --git a/gp-saml-gui.py b/gp-saml-gui.py
index eaa9680..d6f8f15 100755
--- a/gp-saml-gui.py
+++ b/gp-saml-gui.py
@@ -1,6 +1,15 @@
 #!/usr/bin/env python3
 
-import gi
+try:
+    import gi
+except ImportError:
+    try:
+        import pgi as gi
+    except ImportError:
+        gi = None
+if gi is None:
+    raise ImportError("Either gi (PyGObject) or pgi module is required.")
+
 import argparse
 import pprint
 import urllib
@@ -11,8 +20,9 @@ import ssl
 from operator import setitem
 from os import path
 from shlex import quote
-from sys import stderr
+from sys import stderr, platform
 from binascii import a2b_base64, b2a_base64
+from urllib.parse import urlparse, urlencode
 
 gi.require_version('Gtk', '3.0')
 gi.require_version('WebKit2', '4.0')
@@ -88,10 +98,11 @@ class SAMLLoginView:
             return
 
         mr = webview.get_main_resource()
+        uri = mr.get_uri()
         rs = mr.get_response()
         h = rs.get_http_headers()
         if self.verbose:
-            print('[PAGE   ] Finished loading page %s' % mr.get_uri(), file=stderr)
+            print('[PAGE   ] Finished loading page %s' % uri, file=stderr)
         if not h:
             return
 
@@ -99,7 +110,7 @@ class SAMLLoginView:
         d = {}
         h.foreach(lambda k, v: setitem(d, k, v))
         # filter to interesting headers
-        fd = {name:v for name, v in d.items() if name.startswith('saml-') or name in ('location', 'prelogin-cookie', 'portal-userauthcookie')}
+        fd = {name:v for name, v in d.items() if name.startswith('saml-') or name in ('prelogin-cookie', 'portal-userauthcookie')}
         if fd and self.verbose:
             print("[SAML   ] Got SAML result headers: %r" % fd, file=stderr)
             if self.verbose > 1:
@@ -108,7 +119,7 @@ class SAMLLoginView:
                 mr.get_data(None, self.log_resource_text, ct[0], ct.params.get('charset'), d)
 
         # check if we're done
-        self.saml_result.update(fd)
+        self.saml_result.update(fd, server=urlparse(uri).netloc)
         GLib.timeout_add(1000, self.check_done)
 
     def check_done(self):
@@ -120,6 +131,10 @@ class SAMLLoginView:
             Gtk.main_quit()
 
 def parse_args(args = None):
+    pf2clientos = dict(linux='Linux', darwin='Mac', win32='Windows', cygwin='Windows')
+    clientos2ocos = dict(Linux='linux-64', Mac='mac-intel', Windows='win')
+    default_clientos = pf2clientos.get(platform, 'Windows')
+
     p = argparse.ArgumentParser()
     p.add_argument('server', help='GlobalProtect server (portal or gateway)')
     p.add_argument('--no-verify', dest='verify', action='store_false', default=True, help='Ignore invalid server certificate')
@@ -129,18 +144,24 @@ def parse_args(args = None):
     x.add_argument('-K', '--no-cookies', dest='cookies', action='store_const', const=None,
                    help="Don't use or store cookies at all")
     x = p.add_mutually_exclusive_group()
-    x.add_argument('-p','--portal', dest='portal', action='store_true', help='SAML auth to portal')
-    x.add_argument('-g','--gateway', dest='portal', action='store_false', help='SAML auth to gateway (default)')
+    x.add_argument('-p','--portal', dest='interface', action='store_const', const='portal', default='gateway',
+                   help='SAML auth to portal')
+    x.add_argument('-g','--gateway', dest='interface', action='store_const', const='gateway',
+                   help='SAML auth to gateway (default)')
     g = p.add_argument_group('Client certificate')
     g.add_argument('-c','--cert', help='PEM file containing client certificate (and optionally private key)')
     g.add_argument('--key', help='PEM file containing client private key (if not included in same file as certificate)')
     g = p.add_argument_group('Debugging and advanced options')
-    g.add_argument('-v','--verbose', default=0, action='count')
+    x = p.add_mutually_exclusive_group()
+    x.add_argument('-v','--verbose', default=1, action='count', help='Increase verbosity of explanatory output to stderr')
+    x.add_argument('-q','--quiet', dest='verbose', action='store_const', const=0, help='Reduce verbosity to a minimum')
     g.add_argument('-x','--external', action='store_true', help='Launch external browser (for debugging)')
     g.add_argument('-u','--uri', action='store_true', help='Treat server as the complete URI of the SAML entry point, rather than GlobalProtect server')
+    g.add_argument('--clientos', choices=set(pf2clientos.values()), default=default_clientos, help="clientos value to send (default is %(default)s)")
     p.add_argument('extra', nargs='*', help='Extra form field(s) to pass to include in the login query string (e.g. "magic-cookie-value=deadbeef01234567")')
     args = p.parse_args(args = None)
 
+    args.ocos = clientos2ocos[args.clientos]
     args.extra = dict(x.split('=', 1) for x in args.extra)
 
     if args.cookies:
@@ -164,15 +185,19 @@ if __name__ == "__main__":
     s.headers['User-Agent'] = 'PAN GlobalProtect'
     s.cert = args.cert
 
+    if2prelogin = {'portal':'global-protect/prelogin.esp','gateway':'ssl-vpn/prelogin.esp'}
+    if2auth = {'portal':'global-protect/getconfig.esp','gateway':'ssl-vpn/login.esp'}
+
     # query prelogin.esp and parse SAML bits
     if args.uri:
         sam, uri, html = 'URI', args.server, None
     else:
-        endpoint = 'https://{}/{}/prelogin.esp'.format(args.server, ('global-protect' if args.portal else 'ssl-vpn'))
+        endpoint = 'https://{}/{}'.format(args.server, if2prelogin[args.interface])
+        data = {'tmp':'tmp', 'kerberos-support':'yes', 'ipv6-support':'yes', 'clientVer':4100, 'clientos':args.clientos, **args.extra}
         if args.verbose:
             print("Looking for SAML auth tags in response to %s..." % endpoint, file=stderr)
         try:
-            res = s.post(endpoint, verify=args.verify, data=args.extra)
+            res = s.post(endpoint, verify=args.verify, data=data)
         except Exception as ex:
             rootex = ex
             while True:
@@ -188,10 +213,15 @@ if __name__ == "__main__":
             else:
                 raise
         xml = ET.fromstring(res.content)
+        if xml.tag != 'prelogin-response':
+            p.error("This does not appear to be a GlobalProtect prelogin response\nCheck in browser: {}?{}".format(endpoint, urlencode(data)))
         sam = xml.find('saml-auth-method')
         sr = xml.find('saml-request')
         if sam is None or sr is None:
-            p.error("This does not appear to be a SAML prelogin response (<saml-auth-method> or <saml-request> tags missing)")
+            p.error("{} prelogin response does not contain SAML tags (<saml-auth-method> or <saml-request> missing)\n\n"
+                    "Things to try:\n"
+                    "1) Spoof an officially supported OS (e.g. --clientos=Windows or --clientos=Mac)\n"
+                    "2) Check in browser: {}?{}".format(args.interface.title(), endpoint, urlencode(data)))
         sam = sam.text
         sr = a2b_base64(sr.text).decode()
         if sam == 'POST':
@@ -223,26 +253,35 @@ if __name__ == "__main__":
 
     # extract response and convert to OpenConnect command-line
     un = slv.saml_result.get('saml-username')
-    for cn in ('prelogin-cookie', 'portal-userauthcookie'):
+    server = slv.saml_result.get('server', args.server)
+
+    for cn, ifh in (('prelogin-cookie','gateway'), ('portal-userauthcookie','portal')):
         cv = slv.saml_result.get(cn)
         if cv:
             break
     else:
-        cn = None
+        cn = ifh = None
+        p.error("Didn't get an expected cookie. Something went wrong.")
 
-    fullpath = ('/global-protect/getconfig.esp' if args.portal else '/ssl-vpn/login.esp')
-    shortpath = ('portal' if args.portal else 'gateway')
     if args.verbose:
+        # Warn about ambiguities
+        if server != args.server and not args.uri:
+            print('''IMPORTANT: During the SAML auth, you were redirected from {0} to {1}. This probably '''
+                  '''means you should specify {1} as the server for final connection, but we're not 100% '''
+                  '''sure about this. You should probably try both.\n'''.format(args.server, server), file=stderr)
+        if ifh != args.interface and not args.uri:
+            print('''IMPORTANT: We started with SAML auth to the {} interface, but received a cookie '''
+                  '''that's often associated with the {} interface. You should probably try both.\n'''.format(args.interface, ifh),
+                  file=stderr)
         print('''\nSAML response converted to OpenConnect command line invocation:\n''', file=stderr)
-        print('''    echo {} |\n        openconnect --protocol=gp --user={} --usergroup={}:{} --passwd-on-stdin {}'''.format(
-            quote(cv), quote(un), quote(shortpath), quote(cn), quote(args.server)), file=stderr)
+        print('''    echo {} |\n        openconnect --protocol=gp --user={} --os={} --usergroup={}:{} --passwd-on-stdin {}'''.format(
+            quote(cv), quote(un), quote(args.ocos), quote(args.interface), quote(cn), quote(server)), file=stderr)
 
         print('''\nSAML response converted to test-globalprotect-login.py invocation:\n''', file=stderr)
-        print('''    test-globalprotect-login.py --user={} -p '' \\\n         https://{}{} {}={}\n'''.format(
-            quote(un), quote(args.server), quote(fullpath), quote(cn), quote(cv)), file=stderr)
-
+        print('''    test-globalprotect-login.py --user={} --clientos={} -p '' \\\n         https://{}/{} {}={}\n'''.format(
+            quote(un), quote(args.clientos), quote(server), quote(if2auth[args.interface]), quote(cn), quote(cv)), file=stderr)
     varvals = {
-        'HOST': quote('https://%s/%s:%s' % (args.server, shortpath, cn)),
-        'USER': quote(un), 'COOKIE': quote(cv),
+        'HOST': quote('https://%s/%s:%s' % (server, if2auth[args.interface], cn)),
+        'USER': quote(un), 'COOKIE': quote(cv), 'OS': quote(args.ocos),
     }
     print('\n'.join('%s=%s' % pair for pair in varvals.items()))