1/*  Part of SWISH
    2
    3    Author:        Jan Wielemaker
    4    E-mail:        J.Wielemaker@cs.vu.nl
    5    WWW:           http://www.swi-prolog.org
    6    Copyright (C): 2017, VU University Amsterdam
    7			 CWI Amsterdam
    8    All rights reserved.
    9
   10    Redistribution and use in source and binary forms, with or without
   11    modification, are permitted provided that the following conditions
   12    are met:
   13
   14    1. Redistributions of source code must retain the above copyright
   15       notice, this list of conditions and the following disclaimer.
   16
   17    2. Redistributions in binary form must reproduce the above copyright
   18       notice, this list of conditions and the following disclaimer in
   19       the documentation and/or other materials provided with the
   20       distribution.
   21
   22    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   23    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   24    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   25    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   26    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   27    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   28    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   29    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   30    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   32    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   33    POSSIBILITY OF SUCH DAMAGE.
   34*/
   35
   36:- module(config_auth_google, []).   37:- use_module(swish(lib/oauth2)).   38:- use_module(swish(lib/plugin/login)).   39:- use_module(library(http/http_dispatch)).   40:- use_module(library(http/http_session)).   41:- use_module(library(http/http_json)).   42:- use_module(library(http/http_path)).   43:- use_module(library(debug)).

   67:- multifile
   68    oauth2:login/3,
   69    oauth2:server_attribute/3,
   70    swish_config:login_item/2,          % -Server, -HTML_DOM
   71    swish_config:login/2,               % +Server, +Request
   72    swish_config:user_info/2.           % +Request, ?Server, -Info
   73
   74:- http_set_session_options([create(noauto)]).   75
   76:- http_handler(swish(logout), google_logout, []).   77
   78swish_config:login_item(google, 10-Item) :-
   79    http_absolute_location(icons('social_google_box.png'), Img, []),
   80    Item = img([ src(Img),
   81                 class('login-with'),
   82                 'data-server'(google),
   83                 'data-frame'(popup),
   84                 title('Login with Google')
   85               ]).
   86
   87swish_config:login(google, Request) :-
   88    oauth2_login(Request, [server(google)]).
   89
   90oauth2:login(_Request, google, TokenInfo) :-
   91    token_info_to_user_info(TokenInfo, UserInfo),
   92    debug(oauth, 'UserInfo: ~p', [UserInfo]),
   93    http_open_session(_SessionID, []),
   94    http_session_assert(oauth2(google, TokenInfo)),
   95    reply_logged_in([ identity_provider('Google'),
   96                      % name(UserInfo.name), Google's 'email' scope does not include name
   97                      name(UserInfo.email),
   98                      user_info(UserInfo)
   99                    ]).

 google_logout(+Request)

Logout by removing the session data

  105google_logout(_Request) :-
  106    catch(http_session_retractall(oauth2(_,_)), _, true),
  107    reply_logged_out([]).

 swish_config:user_info(+Request, ?Server, -Info:dict) is semidet

True if Info represents describes the currently logged in user.

  113swish_config:user_info(_Request, google, UserInfo) :-
  114    http_in_session(_SessionID),
  115    http_session_data(oauth2(google, TokenInfo)),
  116    token_info_to_user_info(TokenInfo, UserInfo).
  117
  118token_info_to_user_info(TokenInfo, UserInfo) :-
  119    oauth2_claim(TokenInfo, Claim),
  120    map_user_info(Claim, Claim1),
  121    http_link_to_id(google_logout, [], LogoutURL),
  122    UserInfo = Claim1.put(_{ auth_method:oauth2,
  123                             logout_url:LogoutURL,
  124                             identity_provider:google
  125                           }).

 map_user_info(+OAuthInfo, -UserInfo) is det

u{user:User, group:Group, name:Name, email:Email}

  131map_user_info(Dict, Dict) :-
  132    debug(oauth, 'Got: ~p', [Dict]).

 oauth2:server_attribute(?ServerID, ?Attribute, ?Value)

Declare properties of an oauth2 identity provider. The values below are for a Unity server.

See also

- swish(lib/oauth2) for a description of the attributes.

  141% from https://accounts.google.com/.well-known/openid-configuration
  142
  143oauth2:server_attribute(google, url,
  144                        'https://accounts.google.com').
  145oauth2:server_attribute(google, redirect_uri,
  146                        'http://demo.logicalcontracts.com/oauth2/google/reply').
  147oauth2:server_attribute(google, client_id,
  148                        '243112776181-v3j5l45j9qqvatemj7bm4a7g9178km1b.apps.googleusercontent.com').
  149oauth2:server_attribute(google, client_secret,
  150                        'u3XAKeyvxG-qQSGgS5W6Fv1n').
  151oauth2:server_attribute(google, scope,
  152%                         profile).
  153                        email). % so we get the user email