certificate based gateway authentication

prototype PSK user authentication with auth-dialog

src/charon/plugins/nm/nm_creds.c

@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#define _GNU_SOURCE
+#include <pthread.h>
+
+#include "nm_creds.h"
+
+#include <daemon.h>
+
+typedef struct private_nm_creds_t private_nm_creds_t;
+
+/**
+ * private data of nm_creds
+ */
+struct private_nm_creds_t {
+
+	/**
+	 * public functions
+	 */
+	nm_creds_t public;
+	
+	/**
+	 * gateway certificate
+	 */
+	certificate_t *cert;
+	
+	/**
+	 * User password
+	 */
+	char *pass;
+	
+	/**
+	 * read/write lock
+	 */
+	pthread_rwlock_t lock;
+};
+
+/**
+ * Implements credential_set_t.create_cert_enumerator
+ */
+static enumerator_t* create_cert_enumerator(private_nm_creds_t *this,
+							certificate_type_t cert, key_type_t key,
+							identification_t *id, bool trusted)
+{
+	if (!this->cert ||
+		(cert != CERT_ANY && cert != this->cert->get_type(this->cert)))
+	{
+		return NULL;
+	}
+	return enumerator_create_cleaner(enumerator_create_single(this->cert, NULL),
+									 (void*)pthread_rwlock_unlock, &this->lock);
+}
+
+/**
+ * Implements credential_set_t.create_cert_enumerator
+ */
+static enumerator_t* create_shared_enumerator(private_nm_creds_t *this, 
+							shared_key_type_t type,	identification_t *me,
+							identification_t *other)
+{
+	shared_key_t *key;
+
+	if (!this->pass || (type != SHARED_EAP && type != SHARED_IKE))
+	{
+		return NULL;
+	}
+	key = shared_key_create(type, chunk_clone(
+								chunk_create(this->pass, strlen(this->pass))));
+	return enumerator_create_cleaner(
+						enumerator_create_single(key, (void*)key->destroy),
+						(void*)pthread_rwlock_unlock, &this->lock);
+}
+
+/**
+ * Implementation of nm_creds_t.set_certificate
+ */
+static void set_certificate(private_nm_creds_t *this, certificate_t *cert)
+{
+	pthread_rwlock_wrlock(&this->lock);
+	DESTROY_IF(this->cert);
+	this->cert = cert;
+	pthread_rwlock_unlock(&this->lock);
+}
+
+/**
+ * Implementation of nm_creds_t.set_password
+ */
+static void set_password(private_nm_creds_t *this, char *password)
+{
+	pthread_rwlock_wrlock(&this->lock);
+	free(this->pass);
+	this->pass = strdup(password);
+	pthread_rwlock_unlock(&this->lock);
+}
+
+/**
+ * Implementation of nm_creds_t.destroy
+ */
+static void destroy(private_nm_creds_t *this)
+{
+	DESTROY_IF(this->cert);
+	free(this->pass);
+	pthread_rwlock_destroy(&this->lock);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+nm_creds_t *nm_creds_create()
+{
+	private_nm_creds_t *this = malloc_thing(private_nm_creds_t);
+	
+	this->public.set.create_private_enumerator = (void*)return_null;
+	this->public.set.create_cert_enumerator = (void*)create_cert_enumerator;
+	this->public.set.create_shared_enumerator = (void*)create_shared_enumerator;
+	this->public.set.create_cdp_enumerator = (void*)return_null;
+	this->public.set.cache_cert = (void*)nop;
+	this->public.set_certificate = (void(*)(nm_creds_t*, certificate_t *cert))set_certificate;
+	this->public.set_password = (void(*)(nm_creds_t*, char *password))set_password;
+	this->public.destroy = (void(*)(nm_creds_t*))destroy;
+	
+	pthread_rwlock_init(&this->lock, NULL);
+	
+	this->cert = NULL;
+	this->pass = NULL;
+	
+	return &this->public;
+}
+