249 lines
10 KiB
Python
Executable File
249 lines
10 KiB
Python
Executable File
#!/usr/bin/env python3
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import gi
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import argparse
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import pprint
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import urllib
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import requests
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import xml.etree.ElementTree as ET
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import ssl
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from operator import setitem
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from os import path
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from shlex import quote
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from sys import stderr
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from binascii import a2b_base64, b2a_base64
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gi.require_version('Gtk', '3.0')
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gi.require_version('WebKit2', '4.0')
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from gi.repository import Gtk, WebKit2, GLib
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class SAMLLoginView:
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def __init__(self, uri, html=None, verbose=False, cookies=None, verify=True):
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window = Gtk.Window()
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# API reference: https://lazka.github.io/pgi-docs/#WebKit2-4.0
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self.closed = False
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self.success = False
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self.saml_result = {}
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self.verbose = verbose
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self.ctx = WebKit2.WebContext.get_default()
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if not args.verify:
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self.ctx.set_tls_errors_policy(WebKit2.TLSErrorsPolicy.IGNORE)
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self.cookies = self.ctx.get_cookie_manager()
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if args.cookies:
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self.cookies.set_accept_policy(WebKit2.CookieAcceptPolicy.ALWAYS)
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self.cookies.set_persistent_storage(args.cookies, WebKit2.CookiePersistentStorage.TEXT)
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self.wview = WebKit2.WebView()
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window.resize(500, 500)
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window.add(self.wview)
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window.show_all()
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window.set_title("SAML Login")
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window.connect('delete-event', self.close)
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self.wview.connect('load-changed', self.get_saml_headers)
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self.wview.connect('resource-load-started', self.log_resources)
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if html:
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self.wview.load_html(html, uri)
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else:
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self.wview.load_uri(uri)
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def close(self, window, event):
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self.closed = True
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Gtk.main_quit()
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def log_resources(self, webview, resource, request):
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if self.verbose > 1:
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print('[REQUEST] %s for resource %s' % (request.get_http_method() or 'Request', resource.get_uri()), file=stderr)
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if self.verbose > 2:
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resource.connect('finished', self.log_resource_details, request)
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def log_resource_details(self, resource, request):
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m = request.get_http_method() or 'Request'
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uri = resource.get_uri()
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rs = resource.get_response()
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h = rs.get_http_headers() if rs else None
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if h:
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ct, cl = h.get_content_type(), h.get_content_length()
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content_type, charset = ct[0], ct.params.get('charset')
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content_details = '%d bytes of %s%s for ' % (cl, content_type, ('; charset='+charset) if charset else '')
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print('[RECEIVE] %sresource %s %s' % (content_details if h else '', m, uri), file=stderr)
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def log_resource_text(self, resource, result, content_type, charset=None, show_headers=None):
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data = resource.get_data_finish(result)
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content_details = '%d bytes of %s%s for ' % (len(data), content_type, ('; charset='+charset) if charset else '')
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print('[DATA ] %sresource %s' % (content_details, resource.get_uri()), file=stderr)
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if show_headers:
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for h,v in show_headers.items():
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print('%s: %s' % (h, v), file=stderr)
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print(file=stderr)
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if charset or content_type.startswith('text/'):
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print(data.decode(charset or 'utf-8'), file=stderr)
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def get_saml_headers(self, webview, event):
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if event != WebKit2.LoadEvent.FINISHED:
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return
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mr = webview.get_main_resource()
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rs = mr.get_response()
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h = rs.get_http_headers()
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if self.verbose:
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print('[PAGE ] Finished loading page %s' % mr.get_uri(), file=stderr)
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if not h:
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return
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# convert to normal dict
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d = {}
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h.foreach(lambda k, v: setitem(d, k, v))
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# filter to interesting headers
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fd = {name:v for name, v in d.items() if name.startswith('saml-') or name in ('location', 'prelogin-cookie', 'portal-userauthcookie')}
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if fd and self.verbose:
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print("[SAML ] Got SAML result headers: %r" % fd, file=stderr)
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if self.verbose > 1:
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# display everything we found
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ct = h.get_content_type()
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mr.get_data(None, self.log_resource_text, ct[0], ct.params.get('charset'), d)
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# check if we're done
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self.saml_result.update(fd)
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GLib.timeout_add(1000, self.check_done)
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def check_done(self):
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d = self.saml_result
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if 'saml-username' in d and ('prelogin-cookie' in d or 'portal-userauthcookie' in d):
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if args.verbose:
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print("[SAML ] Got all required SAML headers, done.", file=stderr)
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self.success = True
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Gtk.main_quit()
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def parse_args(args = None):
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p = argparse.ArgumentParser()
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p.add_argument('server', help='GlobalProtect server (portal or gateway)')
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p.add_argument('--no-verify', dest='verify', action='store_false', default=True, help='Ignore invalid server certificate')
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x = p.add_mutually_exclusive_group()
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x.add_argument('-C', '--cookies', default='~/.gp-saml-gui-cookies',
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help='Use and store cookies in this file (instead of default %(default)s)')
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x.add_argument('-K', '--no-cookies', dest='cookies', action='store_const', const=None,
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help="Don't use or store cookies at all")
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x = p.add_mutually_exclusive_group()
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x.add_argument('-p','--portal', dest='portal', action='store_true', help='SAML auth to portal')
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x.add_argument('-g','--gateway', dest='portal', action='store_false', help='SAML auth to gateway (default)')
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g = p.add_argument_group('Client certificate')
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g.add_argument('-c','--cert', help='PEM file containing client certificate (and optionally private key)')
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g.add_argument('--key', help='PEM file containing client private key (if not included in same file as certificate)')
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g = p.add_argument_group('Debugging and advanced options')
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g.add_argument('-v','--verbose', default=0, action='count')
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g.add_argument('-x','--external', action='store_true', help='Launch external browser (for debugging)')
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g.add_argument('-u','--uri', action='store_true', help='Treat server as the complete URI of the SAML entry point, rather than GlobalProtect server')
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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")')
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args = p.parse_args(args = None)
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args.extra = dict(x.split('=', 1) for x in args.extra)
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if args.cookies:
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args.cookies = path.expanduser(args.cookies)
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if args.cert and args.key:
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args.cert, args.key = (args.cert, args.key), None
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elif args.cert:
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args.cert = (args.cert, None)
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elif args.key:
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p.error('--key specified without --cert')
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else:
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args.cert = None
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return p, args
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if __name__ == "__main__":
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p, args = parse_args()
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s = requests.Session()
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s.headers['User-Agent'] = 'PAN GlobalProtect'
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s.cert = args.cert
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# query prelogin.esp and parse SAML bits
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if args.uri:
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sam, uri, html = 'URI', args.server, None
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else:
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endpoint = 'https://{}/{}/prelogin.esp'.format(args.server, ('global-protect' if args.portal else 'ssl-vpn'))
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if args.verbose:
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print("Looking for SAML auth tags in response to %s..." % endpoint, file=stderr)
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try:
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res = s.post(endpoint, verify=args.verify, data=args.extra)
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except Exception as ex:
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rootex = ex
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while True:
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if isinstance(rootex, ssl.SSLError):
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break
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elif not rootex.__cause__ and not rootex.__context__:
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break
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rootex = rootex.__cause__ or rootex.__context__
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if isinstance(rootex, ssl.CertificateError):
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p.error("SSL certificate error (try --no-verify to ignore): %s" % rootex)
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elif isinstance(rootex, ssl.SSLError):
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p.error("SSL error: %s" % rootex)
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else:
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raise
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xml = ET.fromstring(res.content)
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sam = xml.find('saml-auth-method')
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sr = xml.find('saml-request')
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if sam is None or sr is None:
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p.error("This does not appear to be a SAML prelogin response (<saml-auth-method> or <saml-request> tags missing)")
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sam = sam.text
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sr = a2b_base64(sr.text).decode()
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if sam == 'POST':
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html, uri = sr, None
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elif sam == 'REDIRECT':
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uri, html = sr, None
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else:
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p.error("Unknown SAML method (%s)" % sam)
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# launch external browser for debugging
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if args.external:
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print("Got SAML %s, opening external browser for debugging..." % sam, file=stderr)
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import webbrowser
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if html:
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uri = 'data:text/html;base64,' + b2a_base64(html.encode()).decode()
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webbrowser.open(uri)
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raise SystemExit
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# spawn WebKit view to do SAML interactive login
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if args.verbose:
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print("Got SAML %s, opening browser..." % sam, file=stderr)
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slv = SAMLLoginView(uri, html, verbose=args.verbose, cookies=args.cookies, verify=args.verify)
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Gtk.main()
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if slv.closed:
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print("Login window closed by user.", file=stderr)
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p.exit(1)
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if not slv.success:
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p.error('''Login window closed without producing SAML cookies.''')
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# extract response and convert to OpenConnect command-line
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un = slv.saml_result.get('saml-username')
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for cn in ('prelogin-cookie', 'portal-userauthcookie'):
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cv = slv.saml_result.get(cn)
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if cv:
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break
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else:
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cn = None
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fullpath = ('/global-protect/getconfig.esp' if args.portal else '/ssl-vpn/login.esp')
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shortpath = ('portal' if args.portal else 'gateway')
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if args.verbose:
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print('''\nSAML response converted to OpenConnect command line invocation:\n''', file=stderr)
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print(''' echo {} |\n openconnect --protocol=gp --user={} --usergroup={}:{} --passwd-on-stdin {}'''.format(
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quote(cv), quote(un), quote(shortpath), quote(cn), quote(args.server)), file=stderr)
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print('''\nSAML response converted to test-globalprotect-login.py invocation:\n''', file=stderr)
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print(''' test-globalprotect-login.py --user={} -p '' \\\n https://{}{} {}={}\n'''.format(
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quote(un), quote(args.server), quote(fullpath), quote(cn), quote(cv)), file=stderr)
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varvals = {
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'HOST': quote('https://%s/%s:%s' % (args.server, shortpath, cn)),
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'USER': quote(un), 'COOKIE': quote(cv),
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}
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print('\n'.join('%s=%s' % pair for pair in varvals.items()))
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