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/***************************************************************************\
* *
* BitlBee - An IRC to IM gateway *
* Simple OAuth client (consumer) implementation. *
* *
* Copyright 2010-2011 Wilmer van der Gaast <wilmer@gaast.net> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
* *
\***************************************************************************/
#include <glib.h>
#include "http_client.h"
#include "oauth2.h"
#include "oauth.h"
#include "url.h"
char *oauth2_url( const struct oauth2_service *sp )
{
return g_strconcat( sp->auth_url,
"?scope=", sp->scope,
"&response_type=code"
"&redirect_uri=", sp->redirect_url,
"&client_id=", sp->consumer_key,
NULL );
}
struct oauth2_access_token_data
{
oauth2_token_callback func;
gpointer data;
};
static char *oauth2_json_dumb_get( const char *json, const char *key );
static void oauth2_access_token_done( struct http_request *req );
int oauth2_access_token( const struct oauth2_service *sp,
const char *auth_type, const char *auth,
oauth2_token_callback func, gpointer data )
{
GSList *args = NULL;
char *args_s, *s;
url_t url_p;
struct http_request *req;
struct oauth2_access_token_data *cb_data;
if( !url_set( &url_p, sp->token_url ) )
return 0;
oauth_params_add( &args, "client_id", sp->consumer_key );
oauth_params_add( &args, "client_secret", sp->consumer_secret );
oauth_params_add( &args, "grant_type", auth_type );
if( strcmp( auth_type, OAUTH2_AUTH_CODE ) == 0 )
{
oauth_params_add( &args, "redirect_uri", sp->redirect_url );
oauth_params_add( &args, "code", auth );
}
else
{
oauth_params_add( &args, "refresh_token", auth );
}
args_s = oauth_params_string( args );
oauth_params_free( &args );
s = g_strdup_printf( "POST %s HTTP/1.0\r\n"
"Host: %s\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n"
"Content-Length: %zd\r\n"
"Connection: close\r\n"
"\r\n"
"%s", url_p.file, url_p.host, strlen( args_s ), args_s );
g_free( args_s );
cb_data = g_new0( struct oauth2_access_token_data, 1 );
cb_data->func = func;
cb_data->data = data;
req = http_dorequest( url_p.host, url_p.port, url_p.proto == PROTO_HTTPS,
s, oauth2_access_token_done, cb_data );
g_free( s );
if( req == NULL )
g_free( cb_data );
return req != NULL;
}
static void oauth2_access_token_done( struct http_request *req )
{
struct oauth2_access_token_data *cb_data = req->data;
char *atoken = NULL, *rtoken = NULL;
const char *content_type;
if( getenv( "BITLBEE_DEBUG" ) && req->reply_body )
printf( "%s\n", req->reply_body );
content_type = get_rfc822_header( req->reply_headers, "Content-Type", 0 );
if( req->status_code != 200 )
{
}
else if( content_type && strstr( content_type, "application/json" ) )
{
atoken = oauth2_json_dumb_get( req->reply_body, "access_token" );
rtoken = oauth2_json_dumb_get( req->reply_body, "refresh_token" );
if( getenv( "BITLBEE_DEBUG" ) )
printf( "Extracted atoken=%s rtoken=%s\n", atoken, rtoken );
}
else
{
/* Facebook use their own odd format here, seems to be URL-encoded. */
GSList *p_in = NULL;
oauth_params_parse( &p_in, req->reply_body );
atoken = g_strdup( oauth_params_get( &p_in, "access_token" ) );
rtoken = g_strdup( oauth_params_get( &p_in, "refresh_token" ) );
oauth_params_free( &p_in );
}
cb_data->func( cb_data->data, atoken, rtoken );
g_free( atoken );
g_free( rtoken );
g_free( cb_data );
}
/* Super dumb. I absolutely refuse to use/add a complete json parser library
(adding a new dependency to BitlBee for the first time in.. 6 years?) just
to parse 100 bytes of data. So I have to do my own parsing because OAuth2
dropped support for XML. (GRRR!) This is very dumb and for example won't
work for integer values, nor will it strip/handle backslashes. */
static char *oauth2_json_dumb_get( const char *json, const char *key )
{
int is_key; /* 1 == reading key, 0 == reading value */
int found_key = 0;
while( json && *json )
{
/* Grab strings and see if they're what we're looking for. */
if( *json == '"' || *json == '\'' )
{
char q = *json;
const char *str_start;
json ++;
str_start = json;
while( *json )
{
/* \' and \" are not string terminators. */
if( *json == '\\' && json[1] == q )
json ++;
/* But without a \ it is. */
else if( *json == q )
break;
json ++;
}
if( *json == '\0' )
return NULL;
if( is_key && strncmp( str_start, key, strlen( key ) ) == 0 )
{
found_key = 1;
}
else if( !is_key && found_key )
{
char *ret = g_memdup( str_start, json - str_start + 1 );
ret[json-str_start] = '\0';
return ret;
}
}
else if( *json == '{' || *json == ',' )
{
found_key = 0;
is_key = 1;
}
else if( *json == ':' )
is_key = 0;
json ++;
}
return NULL;
}
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