add sofia-sip 1.12.4 (plus some patches through 12/21/2006) to in tree libs

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3774 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/libsofia-sip-ua/iptsec/auth_plugin.c

@@ -0,0 +1,157 @@
+/*
+ * This file is part of the Sofia-SIP package
+ *
+ * Copyright (C) 2005 Nokia Corporation.
+ *
+ * Contact: Pekka Pessi <pekka.pessi@nokia.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+/**
+ * @file auth_plugin.c
+ * @brief Plugin interface for authentication verification modules.
+ * 
+ * @author Pekka Pessi <Pekka.Pessi@nokia.com>
+ * 
+ * @date Created: Tue Apr 27 15:23:31 2004 ppessi
+ */
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+
+#include <sofia-sip/auth_digest.h>
+
+#if HAVE_FUNC
+#elif HAVE_FUNCTION
+#define __func__ __FUNCTION__
+#else
+static char const __func__[] = "auth_plugin";
+#endif
+
+#include <sofia-sip/su_debug.h>
+
+#include <sofia-sip/su_wait.h>
+#include <sofia-sip/su_alloc.h>
+#include <sofia-sip/su_tagarg.h>
+
+#include "sofia-sip/auth_module.h"
+#include "sofia-sip/auth_plugin.h"
+
+extern auth_scheme_t auth_scheme_basic[];
+extern auth_scheme_t auth_scheme_digest[];
+extern auth_scheme_t auth_scheme_delayed[];
+
+enum { N = 32 };
+
+static auth_scheme_t *schemes[N] = {
+  auth_scheme_basic,
+  auth_scheme_digest,
+  auth_scheme_delayed
+};
+
+/** Register an authentication plugin. 
+ *
+ * @retval 0 when successful
+ * @retval -1 upon an error
+ */
+int auth_mod_register_plugin(auth_scheme_t *asch)
+{
+  int i;
+
+  for (i = 0; schemes[i]; i++) {
+    if (i == N)
+      return -1;
+  }
+  
+  schemes[i] = asch;
+
+  return 0;
+}
+
+/**Create an authentication plugin module. 
+ *
+ * The function auth_mod_create() creates a module used to authenticate the
+ * requests.
+ * 
+ * @param root pointer to a su_root_t object
+ * @param tag,value,... tagged argument list
+ *
+ * @TAGS
+ * AUTHTAG_METHOD(), AUTHTAG_REALM(), AUTHTAG_DB(), AUTHTAG_ALLOW(),
+ * AUTHTAG_QOP(), AUTHTAG_ALGORITHM(), AUTHTAG_EXPIRES(),
+ * AUTHTAG_BLACKLIST(), AUTHTAG_FORBIDDEN(), AUTHTAG_ANONYMOUS(),
+ * AUTHTAG_REMOTE().
+ */
+auth_mod_t *auth_mod_create(su_root_t *root,
+			    tag_type_t tag, tag_value_t value, ...)
+{
+  auth_mod_t *am = NULL;
+
+  ta_list ta;
+
+  char const *method = NULL;
+
+  ta_start(ta, tag, value);
+
+  tl_gets(ta_args(ta),
+	  AUTHTAG_METHOD_REF(method),
+	  TAG_NULL());
+
+  if (method) {
+    auth_scheme_t *bscheme = NULL;
+    char const *base;
+    size_t len;
+
+    base = strrchr(method, '+');
+    if (base) 
+      len = base++ - method;
+    else
+      len = strlen(method);
+
+    if (base == NULL)
+      ;
+    else if (strcasecmp(base, "Basic") == 0)
+      bscheme = auth_scheme_basic;
+    else if (strcasecmp(base, "Digest") == 0) 
+      bscheme = auth_scheme_digest;
+
+    if (base == NULL || bscheme) {
+      int i;
+
+      for (i = 0; schemes[i] && i < N; i++) {
+	if (strncasecmp(schemes[i]->asch_method, method, len) == 0 &&
+	    schemes[i]->asch_method[len] == 0) {
+	  am = auth_mod_alloc(schemes[i], ta_tags(ta));
+	  if (schemes[i]->asch_init(am, bscheme, root, ta_tags(ta)) == -1) {
+	    auth_mod_destroy(am), am = NULL;
+	  }
+	  break;
+	}
+      }
+    }
+  }
+
+  ta_end(ta);
+  
+  return am;
+}