Identifies user authentication ID using SASL PLAIN mechanism

Identifies user authentication ID when user authenticates using SASL
PLAIN mechanism. It simply base64 decodes the first SASL message sent
by client.

diff --git a/jabber.c b/jabber.c
index 1c3f520..81dc849 100644 (file)
--- a/jabber.c
+++ b/jabber.c
@@ -80,9 +80,27 @@ void jabber_connect_server (net_hook_t* hook, char* server, iks* node)
   g_string_free (buffer, TRUE);
 }
 
+void
+jabber_sasl_plain_filter (iks *node)
+{
+  if (g_str_equal (iks_name (node), "auth") &&
+      g_str_equal (iks_find_attrib (node, "xmlns"),
+                                   "urn:ietf:params:xml:ns:xmpp-sasl"))
+    {
+      char *b64;
+      char *uname;
+      gsize uname_len;
+      b64 = iks_cdata (iks_child (node));
+      uname = g_base64_decode (b64, &uname_len);
+      g_message ("User trying authentication as %s", uname);
+      g_free (uname);
+    }
+}
+
 void jabber_send (net_hook_t* hook, iks* node)
 {
   GString* buffer;
+  jabber_sasl_plain_filter (node);
   buffer = g_string_new (iks_string (iks_stack (node), node));
   gnet_conn_write (hook->peer->conn, buffer->str, buffer->len);
   g_string_free (buffer, TRUE);