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-rw-r--r--protocols/jabber/sasl.c236
1 files changed, 217 insertions, 19 deletions
diff --git a/protocols/jabber/sasl.c b/protocols/jabber/sasl.c
index 53248ef3..d08890a6 100644
--- a/protocols/jabber/sasl.c
+++ b/protocols/jabber/sasl.c
@@ -25,6 +25,36 @@
#include "jabber.h"
#include "base64.h"
+#include "oauth2.h"
+#include "oauth.h"
+
+const struct oauth2_service oauth2_service_google =
+{
+ "https://accounts.google.com/o/oauth2/auth",
+ "https://accounts.google.com/o/oauth2/token",
+ "urn:ietf:wg:oauth:2.0:oob",
+ "https://www.googleapis.com/auth/googletalk",
+ "783993391592.apps.googleusercontent.com",
+ "6C-Zgf7Tr7gEQTPlBhMUgo7R",
+};
+const struct oauth2_service oauth2_service_facebook =
+{
+ "https://www.facebook.com/dialog/oauth",
+ "https://graph.facebook.com/oauth/access_token",
+ "http://www.bitlbee.org/main.php/Facebook/oauth2.html",
+ "offline_access,xmpp_login",
+ "126828914005625",
+ "4b100f0f244d620bf3f15f8b217d4c32",
+};
+const struct oauth2_service oauth2_service_mslive =
+{
+ "https://oauth.live.com/authorize",
+ "https://oauth.live.com/token",
+ "http://www.bitlbee.org/main.php/Messenger/oauth2.html",
+ "wl.offline_access%20wl.messenger",
+ "000000004C06FCD1",
+ "IRKlBPzJJAWcY-TbZjiTEJu9tn7XCFaV",
+};
xt_status sasl_pkt_mechanisms( struct xt_node *node, gpointer data )
{
@@ -32,7 +62,9 @@ xt_status sasl_pkt_mechanisms( struct xt_node *node, gpointer data )
struct jabber_data *jd = ic->proto_data;
struct xt_node *c, *reply;
char *s;
- int sup_plain = 0, sup_digest = 0;
+ int sup_plain = 0, sup_digest = 0, sup_gtalk = 0, sup_fb = 0, sup_ms = 0;
+ int want_oauth = FALSE;
+ GString *mechs;
if( !sasl_supported( ic ) )
{
@@ -51,28 +83,82 @@ xt_status sasl_pkt_mechanisms( struct xt_node *node, gpointer data )
return XT_ABORT;
}
+ mechs = g_string_new( "" );
c = node->children;
while( ( c = xt_find_node( c, "mechanism" ) ) )
{
if( c->text && g_strcasecmp( c->text, "PLAIN" ) == 0 )
sup_plain = 1;
- if( c->text && g_strcasecmp( c->text, "DIGEST-MD5" ) == 0 )
+ else if( c->text && g_strcasecmp( c->text, "DIGEST-MD5" ) == 0 )
sup_digest = 1;
+ else if( c->text && g_strcasecmp( c->text, "X-OAUTH2" ) == 0 )
+ sup_gtalk = 1;
+ else if( c->text && g_strcasecmp( c->text, "X-FACEBOOK-PLATFORM" ) == 0 )
+ sup_fb = 1;
+ else if( c->text && g_strcasecmp( c->text, "X-MESSENGER-OAUTH2" ) == 0 )
+ sup_ms = 1;
+
+ if( c->text )
+ g_string_append_printf( mechs, " %s", c->text );
c = c->next;
}
if( !sup_plain && !sup_digest )
{
- imcb_error( ic, "No known SASL authentication schemes supported" );
+ if( !sup_gtalk && !sup_fb && !sup_ms )
+ imcb_error( ic, "This server requires OAuth "
+ "(supported schemes:%s)", mechs->str );
+ else
+ imcb_error( ic, "BitlBee does not support any of the offered SASL "
+ "authentication schemes:%s", mechs->str );
imc_logout( ic, FALSE );
+ g_string_free( mechs, TRUE );
return XT_ABORT;
}
+ g_string_free( mechs, TRUE );
reply = xt_new_node( "auth", NULL, NULL );
xt_add_attr( reply, "xmlns", XMLNS_SASL );
+ want_oauth = set_getbool( &ic->acc->set, "oauth" );
- if( sup_digest )
+ if( sup_gtalk && want_oauth )
+ {
+ int len;
+
+ /* X-OAUTH2 is, not *the* standard OAuth2 SASL/XMPP implementation.
+ It's currently used by GTalk and vaguely documented on
+ http://code.google.com/apis/cloudprint/docs/rawxmpp.html . */
+ xt_add_attr( reply, "mechanism", "X-OAUTH2" );
+
+ len = strlen( jd->username ) + strlen( jd->oauth2_access_token ) + 2;
+ s = g_malloc( len + 1 );
+ s[0] = 0;
+ strcpy( s + 1, jd->username );
+ strcpy( s + 2 + strlen( jd->username ), jd->oauth2_access_token );
+ reply->text = base64_encode( (unsigned char *)s, len );
+ reply->text_len = strlen( reply->text );
+ g_free( s );
+ }
+ else if( sup_ms && want_oauth )
+ {
+ xt_add_attr( reply, "mechanism", "X-MESSENGER-OAUTH2" );
+ reply->text = g_strdup( jd->oauth2_access_token );
+ reply->text_len = strlen( jd->oauth2_access_token );
+ }
+ else if( sup_fb && want_oauth )
+ {
+ xt_add_attr( reply, "mechanism", "X-FACEBOOK-PLATFORM" );
+ jd->flags |= JFLAG_SASL_FB;
+ }
+ else if( want_oauth )
+ {
+ imcb_error( ic, "OAuth requested, but not supported by server" );
+ imc_logout( ic, FALSE );
+ xt_free_node( reply );
+ return XT_ABORT;
+ }
+ else if( sup_digest )
{
xt_add_attr( reply, "mechanism", "DIGEST-MD5" );
@@ -95,7 +181,7 @@ xt_status sasl_pkt_mechanisms( struct xt_node *node, gpointer data )
g_free( s );
}
- if( !jabber_write_packet( ic, reply ) )
+ if( reply && !jabber_write_packet( ic, reply ) )
{
xt_free_node( reply );
return XT_ABORT;
@@ -196,12 +282,12 @@ xt_status sasl_pkt_challenge( struct xt_node *node, gpointer data )
{
struct im_connection *ic = data;
struct jabber_data *jd = ic->proto_data;
- struct xt_node *reply = NULL;
+ struct xt_node *reply_pkt = NULL;
char *nonce = NULL, *realm = NULL, *cnonce = NULL;
unsigned char cnonce_bin[30];
char *digest_uri = NULL;
char *dec = NULL;
- char *s = NULL;
+ char *s = NULL, *reply = NULL;
xt_status ret = XT_ABORT;
if( node->text_len == 0 )
@@ -209,7 +295,29 @@ xt_status sasl_pkt_challenge( struct xt_node *node, gpointer data )
dec = frombase64( node->text );
- if( !( s = sasl_get_part( dec, "rspauth" ) ) )
+ if( jd->flags & JFLAG_SASL_FB )
+ {
+ /* New-style Facebook OAauth2 support. Instead of sending a refresh
+ token, they just send an access token that should never expire. */
+ GSList *p_in = NULL, *p_out = NULL;
+ char time[33];
+
+ oauth_params_parse( &p_in, dec );
+ oauth_params_add( &p_out, "nonce", oauth_params_get( &p_in, "nonce" ) );
+ oauth_params_add( &p_out, "method", oauth_params_get( &p_in, "method" ) );
+ oauth_params_free( &p_in );
+
+ g_snprintf( time, sizeof( time ), "%lld", (long long) ( gettime() * 1000 ) );
+ oauth_params_add( &p_out, "call_id", time );
+ oauth_params_add( &p_out, "api_key", oauth2_service_facebook.consumer_key );
+ oauth_params_add( &p_out, "v", "1.0" );
+ oauth_params_add( &p_out, "format", "XML" );
+ oauth_params_add( &p_out, "access_token", jd->oauth2_access_token );
+
+ reply = oauth_params_string( p_out );
+ oauth_params_free( &p_out );
+ }
+ else if( !( s = sasl_get_part( dec, "rspauth" ) ) )
{
/* See RFC 2831 for for information. */
md5_state_t A1, A2, H;
@@ -270,23 +378,20 @@ xt_status sasl_pkt_challenge( struct xt_node *node, gpointer data )
sprintf( Hh + i * 2, "%02x", Hr[i] );
/* Now build the SASL response string: */
- g_free( dec );
- dec = g_strdup_printf( "username=\"%s\",realm=\"%s\",nonce=\"%s\",cnonce=\"%s\","
- "nc=%08x,qop=auth,digest-uri=\"%s\",response=%s,charset=%s",
- jd->username, realm, nonce, cnonce, 1, digest_uri, Hh, "utf-8" );
- s = tobase64( dec );
+ reply = g_strdup_printf( "username=\"%s\",realm=\"%s\",nonce=\"%s\",cnonce=\"%s\","
+ "nc=%08x,qop=auth,digest-uri=\"%s\",response=%s,charset=%s",
+ jd->username, realm, nonce, cnonce, 1, digest_uri, Hh, "utf-8" );
}
else
{
/* We found rspauth, but don't really care... */
- g_free( s );
- s = NULL;
}
- reply = xt_new_node( "response", s, NULL );
- xt_add_attr( reply, "xmlns", XMLNS_SASL );
+ s = reply ? tobase64( reply ) : NULL;
+ reply_pkt = xt_new_node( "response", s, NULL );
+ xt_add_attr( reply_pkt, "xmlns", XMLNS_SASL );
- if( !jabber_write_packet( ic, reply ) )
+ if( !jabber_write_packet( ic, reply_pkt ) )
goto silent_error;
ret = XT_HANDLED;
@@ -300,10 +405,11 @@ silent_error:
g_free( digest_uri );
g_free( cnonce );
g_free( nonce );
+ g_free( reply );
g_free( realm );
g_free( dec );
g_free( s );
- xt_free_node( reply );
+ xt_free_node( reply_pkt );
return ret;
}
@@ -346,3 +452,95 @@ gboolean sasl_supported( struct im_connection *ic )
return ( jd->xt && jd->xt->root && xt_find_attr( jd->xt->root, "version" ) ) != 0;
}
+
+void sasl_oauth2_init( struct im_connection *ic )
+{
+ struct jabber_data *jd = ic->proto_data;
+ char *msg, *url;
+
+ imcb_log( ic, "Starting OAuth authentication" );
+
+ /* Temporary contact, just used to receive the OAuth response. */
+ imcb_add_buddy( ic, JABBER_OAUTH_HANDLE, NULL );
+ url = oauth2_url( jd->oauth2_service );
+ msg = g_strdup_printf( "Open this URL in your browser to authenticate: %s", url );
+ imcb_buddy_msg( ic, JABBER_OAUTH_HANDLE, msg, 0, 0 );
+ imcb_buddy_msg( ic, JABBER_OAUTH_HANDLE, "Respond to this message with the returned "
+ "authorization token.", 0, 0 );
+
+ g_free( msg );
+ g_free( url );
+}
+
+static gboolean sasl_oauth2_remove_contact( gpointer data, gint fd, b_input_condition cond )
+{
+ struct im_connection *ic = data;
+ if( g_slist_find( jabber_connections, ic ) )
+ imcb_remove_buddy( ic, JABBER_OAUTH_HANDLE, NULL );
+ return FALSE;
+}
+
+static void sasl_oauth2_got_token( gpointer data, const char *access_token, const char *refresh_token );
+
+int sasl_oauth2_get_refresh_token( struct im_connection *ic, const char *msg )
+{
+ struct jabber_data *jd = ic->proto_data;
+ char *code;
+ int ret;
+
+ imcb_log( ic, "Requesting OAuth access token" );
+
+ /* Don't do it here because the caller may get confused if the contact
+ we're currently sending a message to is deleted. */
+ b_timeout_add( 1, sasl_oauth2_remove_contact, ic );
+
+ code = g_strdup( msg );
+ g_strstrip( code );
+ ret = oauth2_access_token( jd->oauth2_service, OAUTH2_AUTH_CODE,
+ code, sasl_oauth2_got_token, ic );
+
+ g_free( code );
+ return ret;
+}
+
+int sasl_oauth2_refresh( struct im_connection *ic, const char *refresh_token )
+{
+ struct jabber_data *jd = ic->proto_data;
+
+ return oauth2_access_token( jd->oauth2_service, OAUTH2_AUTH_REFRESH,
+ refresh_token, sasl_oauth2_got_token, ic );
+}
+
+static void sasl_oauth2_got_token( gpointer data, const char *access_token, const char *refresh_token )
+{
+ struct im_connection *ic = data;
+ struct jabber_data *jd;
+ GSList *auth = NULL;
+
+ if( g_slist_find( jabber_connections, ic ) == NULL )
+ return;
+
+ jd = ic->proto_data;
+
+ if( access_token == NULL )
+ {
+ imcb_error( ic, "OAuth failure (missing access token)" );
+ imc_logout( ic, TRUE );
+ return;
+ }
+
+ oauth_params_parse( &auth, ic->acc->pass );
+ if( refresh_token )
+ oauth_params_set( &auth, "refresh_token", refresh_token );
+ if( access_token )
+ oauth_params_set( &auth, "access_token", access_token );
+
+ g_free( ic->acc->pass );
+ ic->acc->pass = oauth_params_string( auth );
+ oauth_params_free( &auth );
+
+ g_free( jd->oauth2_access_token );
+ jd->oauth2_access_token = g_strdup( access_token );
+
+ jabber_connect( ic );
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 12:46:14 +0000