1 | /***************************************************************************\ |
---|
2 | * * |
---|
3 | * BitlBee - An IRC to IM gateway * |
---|
4 | * Simple OAuth client (consumer) implementation. * |
---|
5 | * * |
---|
6 | * Copyright 2010-2011 Wilmer van der Gaast <wilmer@gaast.net> * |
---|
7 | * * |
---|
8 | * This program is free software; you can redistribute it and/or modify * |
---|
9 | * it under the terms of the GNU General Public License as published by * |
---|
10 | * the Free Software Foundation; either version 2 of the License, or * |
---|
11 | * (at your option) any later version. * |
---|
12 | * * |
---|
13 | * This program is distributed in the hope that it will be useful, * |
---|
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
---|
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
---|
16 | * GNU General Public License for more details. * |
---|
17 | * * |
---|
18 | * You should have received a copy of the GNU General Public License along * |
---|
19 | * with this program; if not, write to the Free Software Foundation, Inc., * |
---|
20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
---|
21 | * * |
---|
22 | \***************************************************************************/ |
---|
23 | |
---|
24 | #include <glib.h> |
---|
25 | #include "http_client.h" |
---|
26 | #include "oauth2.h" |
---|
27 | #include "oauth.h" |
---|
28 | #include "url.h" |
---|
29 | |
---|
30 | char *oauth2_url( const struct oauth2_service *sp ) |
---|
31 | { |
---|
32 | return g_strconcat( sp->auth_url, |
---|
33 | "?scope=", sp->scope, |
---|
34 | "&response_type=code" |
---|
35 | "&redirect_uri=", sp->redirect_url, |
---|
36 | "&client_id=", sp->consumer_key, |
---|
37 | NULL ); |
---|
38 | } |
---|
39 | |
---|
40 | struct oauth2_access_token_data |
---|
41 | { |
---|
42 | oauth2_token_callback func; |
---|
43 | gpointer data; |
---|
44 | }; |
---|
45 | |
---|
46 | static char *oauth2_json_dumb_get( const char *json, const char *key ); |
---|
47 | static void oauth2_access_token_done( struct http_request *req ); |
---|
48 | |
---|
49 | int oauth2_access_token( const struct oauth2_service *sp, |
---|
50 | const char *auth_type, const char *auth, |
---|
51 | oauth2_token_callback func, gpointer data ) |
---|
52 | { |
---|
53 | GSList *args = NULL; |
---|
54 | char *args_s, *s; |
---|
55 | url_t url_p; |
---|
56 | struct http_request *req; |
---|
57 | struct oauth2_access_token_data *cb_data; |
---|
58 | |
---|
59 | if( !url_set( &url_p, sp->token_url ) ) |
---|
60 | return 0; |
---|
61 | |
---|
62 | oauth_params_add( &args, "client_id", sp->consumer_key ); |
---|
63 | oauth_params_add( &args, "client_secret", sp->consumer_secret ); |
---|
64 | oauth_params_add( &args, "grant_type", auth_type ); |
---|
65 | if( strcmp( auth_type, OAUTH2_AUTH_CODE ) == 0 ) |
---|
66 | { |
---|
67 | oauth_params_add( &args, "redirect_uri", sp->redirect_url ); |
---|
68 | oauth_params_add( &args, "code", auth ); |
---|
69 | } |
---|
70 | else |
---|
71 | { |
---|
72 | oauth_params_add( &args, "refresh_token", auth ); |
---|
73 | } |
---|
74 | args_s = oauth_params_string( args ); |
---|
75 | oauth_params_free( &args ); |
---|
76 | |
---|
77 | s = g_strdup_printf( "POST %s HTTP/1.0\r\n" |
---|
78 | "Host: %s\r\n" |
---|
79 | "Content-Type: application/x-www-form-urlencoded\r\n" |
---|
80 | "Content-Length: %zd\r\n" |
---|
81 | "Connection: close\r\n" |
---|
82 | "\r\n" |
---|
83 | "%s", url_p.file, url_p.host, strlen( args_s ), args_s ); |
---|
84 | g_free( args_s ); |
---|
85 | |
---|
86 | cb_data = g_new0( struct oauth2_access_token_data, 1 ); |
---|
87 | cb_data->func = func; |
---|
88 | cb_data->data = data; |
---|
89 | |
---|
90 | req = http_dorequest( url_p.host, url_p.port, url_p.proto == PROTO_HTTPS, |
---|
91 | s, oauth2_access_token_done, cb_data ); |
---|
92 | |
---|
93 | g_free( s ); |
---|
94 | |
---|
95 | if( req == NULL ) |
---|
96 | g_free( cb_data ); |
---|
97 | |
---|
98 | return req != NULL; |
---|
99 | } |
---|
100 | |
---|
101 | static void oauth2_access_token_done( struct http_request *req ) |
---|
102 | { |
---|
103 | struct oauth2_access_token_data *cb_data = req->data; |
---|
104 | char *atoken = NULL, *rtoken = NULL; |
---|
105 | const char *content_type; |
---|
106 | |
---|
107 | if( getenv( "BITLBEE_DEBUG" ) && req->reply_body ) |
---|
108 | printf( "%s\n", req->reply_body ); |
---|
109 | |
---|
110 | content_type = get_rfc822_header( req->reply_headers, "Content-Type", 0 ); |
---|
111 | |
---|
112 | if( req->status_code != 200 ) |
---|
113 | { |
---|
114 | } |
---|
115 | else if( content_type && strstr( content_type, "application/json" ) ) |
---|
116 | { |
---|
117 | atoken = oauth2_json_dumb_get( req->reply_body, "access_token" ); |
---|
118 | rtoken = oauth2_json_dumb_get( req->reply_body, "refresh_token" ); |
---|
119 | } |
---|
120 | else |
---|
121 | { |
---|
122 | /* Facebook use their own odd format here, seems to be URL-encoded. */ |
---|
123 | GSList *p_in = NULL; |
---|
124 | |
---|
125 | oauth_params_parse( &p_in, req->reply_body ); |
---|
126 | atoken = g_strdup( oauth_params_get( &p_in, "access_token" ) ); |
---|
127 | rtoken = g_strdup( oauth_params_get( &p_in, "refresh_token" ) ); |
---|
128 | oauth_params_free( &p_in ); |
---|
129 | } |
---|
130 | if( getenv( "BITLBEE_DEBUG" ) ) |
---|
131 | printf( "Extracted atoken=%s rtoken=%s\n", atoken, rtoken ); |
---|
132 | |
---|
133 | cb_data->func( cb_data->data, atoken, rtoken ); |
---|
134 | g_free( atoken ); |
---|
135 | g_free( rtoken ); |
---|
136 | g_free( cb_data ); |
---|
137 | } |
---|
138 | |
---|
139 | /* Super dumb. I absolutely refuse to use/add a complete json parser library |
---|
140 | (adding a new dependency to BitlBee for the first time in.. 6 years?) just |
---|
141 | to parse 100 bytes of data. So I have to do my own parsing because OAuth2 |
---|
142 | dropped support for XML. (GRRR!) This is very dumb and for example won't |
---|
143 | work for integer values, nor will it strip/handle backslashes. */ |
---|
144 | static char *oauth2_json_dumb_get( const char *json, const char *key ) |
---|
145 | { |
---|
146 | int is_key = 0; /* 1 == reading key, 0 == reading value */ |
---|
147 | int found_key = 0; |
---|
148 | |
---|
149 | while( json && *json ) |
---|
150 | { |
---|
151 | /* Grab strings and see if they're what we're looking for. */ |
---|
152 | if( *json == '"' || *json == '\'' ) |
---|
153 | { |
---|
154 | char q = *json; |
---|
155 | const char *str_start; |
---|
156 | json ++; |
---|
157 | str_start = json; |
---|
158 | |
---|
159 | while( *json ) |
---|
160 | { |
---|
161 | /* \' and \" are not string terminators. */ |
---|
162 | if( *json == '\\' && json[1] == q ) |
---|
163 | json ++; |
---|
164 | /* But without a \ it is. */ |
---|
165 | else if( *json == q ) |
---|
166 | break; |
---|
167 | json ++; |
---|
168 | } |
---|
169 | if( *json == '\0' ) |
---|
170 | return NULL; |
---|
171 | |
---|
172 | if( is_key && strncmp( str_start, key, strlen( key ) ) == 0 ) |
---|
173 | { |
---|
174 | found_key = 1; |
---|
175 | } |
---|
176 | else if( !is_key && found_key ) |
---|
177 | { |
---|
178 | char *ret = g_memdup( str_start, json - str_start + 1 ); |
---|
179 | ret[json-str_start] = '\0'; |
---|
180 | return ret; |
---|
181 | } |
---|
182 | |
---|
183 | } |
---|
184 | else if( *json == '{' || *json == ',' ) |
---|
185 | { |
---|
186 | found_key = 0; |
---|
187 | is_key = 1; |
---|
188 | } |
---|
189 | else if( *json == ':' ) |
---|
190 | is_key = 0; |
---|
191 | |
---|
192 | json ++; |
---|
193 | } |
---|
194 | |
---|
195 | return NULL; |
---|
196 | } |
---|