X-Git-Url: https://code.communitydata.science/nu-vpn-proxy.git/blobdiff_plain/f429acaa10d15792bf74a4c6cafcf890cd0676ad..2cf05074ccc024726b28798ed58447a1321ec0f3:/gp-saml-gui.py?ds=sidebyside diff --git a/gp-saml-gui.py b/gp-saml-gui.py index e34d123..a49a751 100755 --- a/gp-saml-gui.py +++ b/gp-saml-gui.py @@ -6,27 +6,33 @@ import pprint import urllib import requests import xml.etree.ElementTree as ET -import os +import ssl -from sys import stderr -from binascii import a2b_base64 +from operator import setitem +from os import path +from shlex import quote +from sys import stderr, platform +from binascii import a2b_base64, b2a_base64 +from urllib.parse import urlparse, urlencode gi.require_version('Gtk', '3.0') -from gi.repository import Gtk - gi.require_version('WebKit2', '4.0') -from gi.repository import WebKit2 +from gi.repository import Gtk, WebKit2, GLib 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.closed = False 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) @@ -37,7 +43,7 @@ class SAMLLoginView: window.add(self.wview) window.show_all() window.set_title("SAML Login") - window.connect('delete-event', Gtk.main_quit) + window.connect('delete-event', self.close) self.wview.connect('load-changed', self.get_saml_headers) self.wview.connect('resource-load-started', self.log_resources) @@ -46,52 +52,107 @@ class SAMLLoginView: else: self.wview.load_uri(uri) + def close(self, window, event): + self.closed = True + Gtk.main_quit() + 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) + print('[REQUEST] %s for resource %s' % (request.get_http_method() or 'Request', resource.get_uri()), file=stderr) + if self.verbose > 2: + resource.connect('finished', self.log_resource_details, request) + + def log_resource_details(self, resource, request): + m = request.get_http_method() or 'Request' + uri = resource.get_uri() + rs = resource.get_response() + h = rs.get_http_headers() if rs else None + if h: + ct, cl = h.get_content_type(), h.get_content_length() + content_type, charset = ct[0], ct.params.get('charset') + content_details = '%d bytes of %s%s for ' % (cl, content_type, ('; charset='+charset) if charset else '') + print('[RECEIVE] %sresource %s %s' % (content_details if h else '', m, uri), file=stderr) + + def log_resource_text(self, resource, result, content_type, charset=None, show_headers=None): + data = resource.get_data_finish(result) + content_details = '%d bytes of %s%s for ' % (len(data), content_type, ('; charset='+charset) if charset else '') + print('[DATA ] %sresource %s' % (content_details, resource.get_uri()), file=stderr) + if show_headers: + for h,v in show_headers.items(): + print('%s: %s' % (h, v), file=stderr) + print(file=stderr) + if charset or content_type.startswith('text/'): + print(data.decode(charset or 'utf-8'), file=stderr) def get_saml_headers(self, webview, event): if event != WebKit2.LoadEvent.FINISHED: return mr = webview.get_main_resource() - if self.verbose: - print("Finished loading %s" % mr.get_uri(), file=stderr) + uri = mr.get_uri() rs = mr.get_response() h = rs.get_http_headers() - if h: - l = [] - def listify(name, value, t=l): - 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: - if self.verbose: - print("Got SAML relevant headers, done: %r" % d, file=stderr) - self.success = True - Gtk.main_quit() + if self.verbose: + print('[PAGE ] Finished loading page %s' % uri, file=stderr) + if not h: + return + + # convert to normal dict + 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 ('prelogin-cookie', 'portal-userauthcookie')} + if fd and self.verbose: + print("[SAML ] Got SAML result headers: %r" % fd, file=stderr) + if self.verbose > 1: + # display everything we found + ct = h.get_content_type() + 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, server=urlparse(uri).netloc) + GLib.timeout_add(1000, self.check_done) + + def check_done(self): + d = self.saml_result + if 'saml-username' in d and ('prelogin-cookie' in d or 'portal-userauthcookie' in d): + if args.verbose: + print("[SAML ] Got all required SAML headers, done.", file=stderr) + self.success = True + Gtk.main_quit() def parse_args(args = None): + clientos_map = dict(linux='Linux', darwin='Mac', win32='Windows', cygwin='Windows') + default_clientos = clientos_map.get(platform, 'Windows') + 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, - default='~/.gp-saml-gui-cookies', help="Don't use cookies (stored in %(default)s)") 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('-C', '--cookies', default='~/.gp-saml-gui-cookies', + help='Use and store cookies in this file (instead of default %(default)s)') + 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='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') + 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(clientos_map.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.extra = dict(x.split('=', 1) for x in args.extra) if args.cookies: - args.cookies = os.path.expanduser(args.cookies) + args.cookies = path.expanduser(args.cookies) if args.cert and args.key: args.cert, args.key = (args.cert, args.key), None @@ -111,41 +172,105 @@ 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 - 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 ( or tags missing)") - elif sam.text == 'POST': - html, uri = a2b_base64(sr.text).decode(), None - elif sam.text == 'REDIRECT': - 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://{}/{}'.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=data) + 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) + 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("{} prelogin response does not contain SAML tags ( or 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': + 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 if args.verbose: - print("Got SAML POST, opening browser...", file=stderr) - slv = SAMLLoginView(uri, html, verbose=args.verbose, cookies=args.cookies) + 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 slv.closed: + print("Login window closed by user.", file=stderr) + p.exit(1) if not slv.success: - p.error('''Login window closed without producing SAML cookie''') + p.error('''Login window closed without producing SAML cookies.''') # 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.") 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) + # Warn about ambiguities + if server != args.server and not args.uri: + print('''IMPORTANT: During the SAML auth, you were redirected from {} to {}. This probably''' + '''means you should specify {} 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 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(ifh), 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(server), quote(if2auth[ifh]), quote(cn), quote(cv)), 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)) + varvals = { + 'HOST': quote('https://%s/%s:%s' % (server, if2auth[ifh], cn)), + 'USER': quote(un), 'COOKIE': quote(cv), + } + print('\n'.join('%s=%s' % pair for pair in varvals.items()))