import requests
import xml.etree.ElementTree as ET
import os
+import ssl
+from shlex import quote
from sys import stderr
-from binascii import a2b_base64
+from binascii import a2b_base64, b2a_base64
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import WebKit2
class SAMLLoginView:
- def __init__(self, uri, html=None, verbose=False, cookies=None):
+ def __init__(self, uri, html=None, verbose=False, cookies=None, verify=True):
window = Gtk.Window()
# API reference: https://lazka.github.io/pgi-docs/#WebKit2-4.0
self.success = False
+ self.saml_result = {}
+ self.verbose = verbose
self.ctx = WebKit2.WebContext.get_default()
+ if not args.verify:
+ self.ctx.set_tls_errors_policy(WebKit2.TLSErrorsPolicy.IGNORE)
self.cookies = self.ctx.get_cookie_manager()
if args.cookies:
self.cookies.set_accept_policy(WebKit2.CookieAcceptPolicy.ALWAYS)
window.set_title("SAML Login")
window.connect('delete-event', Gtk.main_quit)
self.wview.connect('load-changed', self.get_saml_headers)
+ self.wview.connect('resource-load-started', self.log_resources)
if html:
self.wview.load_html(html, uri)
else:
self.wview.load_uri(uri)
+ def log_resources(self, webview, resource, request):
+ if self.verbose > 1:
+ print('%s for resource %s' % (request.get_http_method() or 'Request', resource.get_uri()), file=stderr)
+
def get_saml_headers(self, webview, event):
if event != WebKit2.LoadEvent.FINISHED:
return
mr = webview.get_main_resource()
- print("Finished loading %s..." % mr.get_uri(), file=stderr)
+ if self.verbose:
+ print("Finished loading %s" % mr.get_uri(), file=stderr)
rs = mr.get_response()
h = rs.get_http_headers()
if h:
if (name.startswith('saml-') or name in ('prelogin-cookie', 'portal-userauthcookie')):
t.append((name, value))
h.foreach(listify)
- self.saml_result = d = dict(l)
- if d:
- print("Got SAML relevant headers, done: %r" % d, file=stderr)
+ d = dict(l)
+ if d and self.verbose:
+ print("Got SAML result headers: %r" % d, file=stderr)
+ d = self.saml_result
+ d.update(dict(l))
+ if 'saml-username' in d and ('prelogin-cookie' in d or 'portal-userauthcookie' in d):
+ print("Got all required SAML headers, done.", file=stderr)
self.success = True
Gtk.main_quit()
def parse_args(args = None):
p = argparse.ArgumentParser()
- p.add_argument('-v','--verbose', default=0, action='count')
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')
p.add_argument('-C', '--no-cookies', dest='cookies', action='store_const', const=None,
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')
+ 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')
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)
s.cert = args.cert
# query prelogin.esp and parse SAML bits
- endpoint = 'https://{}/{}/prelogin.esp'.format(args.server, ('global-protect' if args.portal else 'ssl-vpn'))
- res = s.post(endpoint, verify=args.verify, data=args.extra)
- xml = ET.fromstring(res.content)
- 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)")
- elif sam.text == 'POST':
- print("Got SAML POST content, opening browser...", file=stderr)
- html, uri = a2b_base64(sr.text).decode(), None
- elif sam.text == 'REDIRECT':
- print("Got SAML REDIRECT to %s, opening browser..." % sr.text, file=stderr)
- uri, html = sr.text, None
+ if args.uri:
+ sam, uri, html = 'URI', args.server, None
else:
- p.error("Unknown SAML method (%s)" % sam.text)
+ endpoint = 'https://{}/{}/prelogin.esp'.format(args.server, ('global-protect' if args.portal else 'ssl-vpn'))
+ print("Looking for SAML auth tags in response to %s..." % endpoint, file=stderr)
+ try:
+ res = s.post(endpoint, verify=args.verify, data=args.extra)
+ except Exception as ex:
+ rootex = ex
+ while True:
+ if isinstance(rootex, ssl.SSLError):
+ break
+ elif not rootex.__cause__ and not rootex.__context__:
+ break
+ rootex = rootex.__cause__ or rootex.__context__
+ if isinstance(rootex, ssl.CertificateError):
+ p.error("SSL certificate error (try --no-verify to ignore): %s" % rootex)
+ elif isinstance(rootex, ssl.SSLError):
+ p.error("SSL error: %s" % rootex)
+ else:
+ raise
+ xml = ET.fromstring(res.content)
+ 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)")
+ sam = sam.text
+ sr = a2b_base64(sr.text).decode()
+ if sam == 'POST':
+ html, uri = sr, None
+ elif sam == 'REDIRECT':
+ uri, html = sr, None
+ else:
+ p.error("Unknown SAML method (%s)" % sam)
+
+ # launch external browser for debugging
+ if args.external:
+ print("Got SAML %s, opening external browser for debugging..." % sam, file=stderr)
+ import webbrowser
+ if html:
+ uri = 'data:text/html;base64,' + b2a_base64(html.encode()).decode()
+ webbrowser.open(uri)
+ raise SystemExit
# spawn WebKit view to do SAML interactive login
- slv = SAMLLoginView(uri, html, verbose=args.verbose, cookies=args.cookies)
+ if args.verbose:
+ print("Got SAML %s, opening browser..." % sam, file=stderr)
+ slv = SAMLLoginView(uri, html, verbose=args.verbose, cookies=args.cookies, verify=args.verify)
Gtk.main()
if not slv.success:
p.error('''Login window closed without producing SAML cookie''')
else:
cn = None
+ fullpath = ('/global-protect/getconfig.esp' if args.portal else '/ssl-vpn/login.esp')
+ shortpath = ('portal' if args.portal else 'gateway')
if args.verbose:
print('''\n\nSAML response converted to OpenConnect command line invocation:\n''', file=stderr)
- print(''' echo {!r} |\n openconnect --protocol=gp --user={!r} --usergroup={}:{} --passwd-on-stdin {}\n'''.format(
- cv, un, ('portal' if args.portal else 'gateway'), cn, args.server), file=stderr)
-
- print("HOST={!r}\nUSER={!r}\nCOOKIE={!r}".format('https://%s/%s:%s' % (args.server, ('portal' if args.portal else 'gateway'), cn), un, cv))
+ print(''' echo {} |\n openconnect --protocol=gp --user={} --usergroup={}:{} --passwd-on-stdin {}\n'''.format(
+ quote(cv), quote(un), quote(shortpath), quote(cn), quote(args.server)), file=stderr)
+
+ varvals = {
+ 'HOST': quote('https://%s/%s:%s' % (args.server, shortpath, cn)),
+ 'USER': quote(un), 'COOKIE': quote(cv),
+ }
+ print('\n'.join('%s=%s' % pair for pair in varvals.items()))
projects / nu-vpn-proxy.git / blobdiff