created class init_config_t encapsulating configuration issues of

IKE_SA_INIT phase

3 files changed, 379 insertions, 0 deletions

diff --git a/Source/charon/config/Makefile.config b/Source/charon/config/Makefile.config
index 977a272b0..1333a24eb 100644
--- a/Source/charon/config/Makefile.config
+++ b/Source/charon/config/Makefile.config
@@ -18,3 +18,7 @@ CONFIG_DIR= $(MAIN_DIR)config/
 OBJS+= $(BUILD_DIR)configuration_manager.o
 $(BUILD_DIR)configuration_manager.o :		$(CONFIG_DIR)configuration_manager.c $(CONFIG_DIR)configuration_manager.h
 											$(CC) $(CFLAGS) -c -o $@ $<
+										
+OBJS+= $(BUILD_DIR)init_config.o
+$(BUILD_DIR)init_config.o :					$(CONFIG_DIR)init_config.c $(CONFIG_DIR)init_config.h
+											$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/Source/charon/config/init_config.c b/Source/charon/config/init_config.c
index e69de29bb..495feb7ab 100644
--- a/Source/charon/config/init_config.c
+++ b/Source/charon/config/init_config.c
@@ -0,0 +1,210 @@
+/**
+ * @file init_config.c
+ * 
+ * @brief Implementation of init_config_t.
+ *  
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, 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.
+ */
+
+#include "init_config.h"
+
+#include <utils/allocator.h>
+#include <utils/linked_list.h>
+
+typedef struct private_init_config_t private_init_config_t;
+
+/**
+ * Private data of an init_config_t object
+ */
+struct private_init_config_t {
+
+	/**
+	 * Public part
+	 */
+	init_config_t public;
+
+	/**
+	 * Host information of my host.
+	 */
+	host_t *my_host;
+
+	/**
+	 * Host information of other host.
+	 */	
+	host_t *other_host;
+	
+	/**
+	 * Supported proposals
+	 */
+	linked_list_t *proposals;
+};
+
+/**
+ * Implementation of init_config_t.get_my_host.
+ */
+static host_t * get_my_host (private_init_config_t *this)
+{
+	return this->my_host->clone(this->my_host);
+}
+
+/**
+ * Implementation of init_config_t.get_other_host.
+ */
+static host_t * get_other_host (private_init_config_t *this)
+{
+	return this->other_host->clone(this->other_host);
+}
+
+/**
+ * Implementation of init_config_t.get_dh_group_number.
+ */
+static diffie_hellman_group_t get_dh_group_number (private_init_config_t *this,size_t priority)
+{
+	ike_proposal_t *ike_proposal;
+	
+	if ((this->proposals->get_count(this->proposals) == 0) || (this->proposals->get_count(this->proposals) < priority))
+	{
+		return MODP_UNDEFINED;
+	}
+	
+	this->proposals->get_at_position(this->proposals,(priority -1),(void **) &ike_proposal);
+	
+	return (ike_proposal->diffie_hellman_group);
+}
+
+/**
+ * Implementation of init_config_t.get_proposals.
+ */
+static size_t get_proposals (private_init_config_t *this,ike_proposal_t **proposals)
+{
+	iterator_t *iterator;
+	ike_proposal_t *current_proposal;
+	int i = 0;
+	ike_proposal_t *proposal_array;
+	
+	proposal_array = allocator_alloc(this->proposals->get_count(this->proposals) * sizeof(ike_proposal_t));
+		
+	iterator = this->proposals->create_iterator(this->proposals,TRUE);
+	
+	while (iterator->has_next(iterator))
+	{
+		iterator->current(iterator,(void **) &current_proposal);
+		proposal_array[i] = (*current_proposal);
+		i++;
+	}
+	iterator->destroy(iterator);
+	
+	*proposals = proposal_array;
+	return this->proposals->get_count(this->proposals);
+}
+	
+/**
+ * Implementation of init_config_t.select_proposal.
+ */
+static status_t select_proposal (private_init_config_t *this, ike_proposal_t *proposals, size_t proposal_count, ike_proposal_t *selected_proposal)
+{
+	iterator_t * my_iterator;
+	int i;
+	ike_proposal_t *my_current_proposal;
+
+	my_iterator = this->proposals->create_iterator(this->proposals,TRUE);
+
+	
+	for (i = 0; i < proposal_count; i++)
+	{
+		my_iterator->reset(my_iterator);
+		while (my_iterator->has_next(my_iterator))
+		{
+			my_iterator->current(my_iterator,(void **) &my_current_proposal);
+		
+			if (memcmp(my_current_proposal,&proposals[i],sizeof(ike_proposal_t)) == 0)
+			{
+				/* found a matching proposal */
+				*selected_proposal = *my_current_proposal;
+				my_iterator->destroy(my_iterator);
+				return SUCCESS;
+			}
+		}				
+	}
+	
+	my_iterator->destroy(my_iterator);
+	return NOT_FOUND;
+}
+
+/**
+ * Implementation of init_config_t.destroy.
+ */
+static void add_proposal (private_init_config_t *this,size_t priority, ike_proposal_t proposal)
+{
+	ike_proposal_t * new_proposal = allocator_alloc(sizeof(ike_proposal_t));
+	
+	*new_proposal = proposal;
+	 
+	
+	if (priority > this->proposals->get_count(this->proposals))
+	{
+		this->proposals->insert_last(this->proposals,new_proposal);
+		return;
+	}
+	
+	this->proposals->insert_at_position(this->proposals,(priority - 1),new_proposal);
+}
+
+/**
+ * Implementation of init_config_t.destroy.
+ */
+static void destroy (private_init_config_t *this)
+{
+	ike_proposal_t *proposal;
+	
+	while (this->proposals->get_count(this->proposals) > 0)
+	{
+		this->proposals->remove_first(this->proposals,(void **) &proposal);
+		allocator_free(proposal);
+	}
+	this->proposals->destroy(this->proposals);
+	
+	this->my_host->destroy(this->my_host);
+	this->other_host->destroy(this->other_host);
+	
+	allocator_free(this);
+}
+
+/**
+ * Described in header.
+ */
+init_config_t * init_config_create(char * my_ip, char *other_ip, u_int16_t my_port, u_int16_t other_port)
+{
+	private_init_config_t *this = allocator_alloc_thing(private_init_config_t);
+
+	/* public functions */
+	this->public.get_my_host = (host_t*(*)(init_config_t*))get_my_host;
+	this->public.get_other_host = (host_t*(*)(init_config_t*))get_other_host;
+	this->public.get_dh_group_number = (diffie_hellman_group_t (*)(init_config_t*,size_t))get_dh_group_number;
+	this->public.get_proposals = (size_t(*)(init_config_t*,ike_proposal_t**))get_proposals;
+	this->public.select_proposal = (status_t(*)(init_config_t*,ike_proposal_t*,size_t,ike_proposal_t*))select_proposal;
+	this->public.add_proposal = (void(*)(init_config_t*, size_t, ike_proposal_t)) add_proposal;
+	this->public.destroy = (void(*)(init_config_t*))destroy;
+	
+	/* private variables */
+	this->my_host = host_create(AF_INET,my_ip, my_port);
+	this->other_host = host_create(AF_INET,other_ip, other_port);
+	
+	this->proposals = linked_list_create();
+
+	return (&this->public);
+}
diff --git a/Source/charon/config/init_config.h b/Source/charon/config/init_config.h
index 4cf98609c..876ead887 100644
--- a/Source/charon/config/init_config.h
+++ b/Source/charon/config/init_config.h
@@ -1,4 +1,169 @@
+/**
+ * @file init_config.h
+ * 
+ * @brief Interface of init_config_t.
+ *  
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, 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.
+ */
+ 
 #ifndef _INIT_CONFIG_H_
 #define _INIT_CONFIG_H_
 
+#include <types.h>
+#include <network/host.h>
+#include <encoding/payloads/sa_payload.h>
+#include <utils/iterator.h>
+
+typedef struct ike_proposal_t ike_proposal_t;
+
+/**
+ * Represents a Proposal used in IKE_SA_INIT phase.
+ */
+struct ike_proposal_t {
+	/**
+	 * Encryption algorithm.
+	 * */
+	encryption_algorithm_t encryption_algorithm;
+	
+	/**
+	 * Key length of encryption algorithm in bytes.
+	 */
+	u_int16_t encryption_algorithm_key_length;
+	
+	/**
+	 * Integrity algorithm.
+	 */
+	integrity_algorithm_t integrity_algorithm;
+	
+	/**
+	 * Key length of integrity algorithm
+	 */
+	u_int16_t integrity_algorithm_key_length;
+	
+	/**
+	 * Pseudo random function (prf).
+	 */
+	pseudo_random_function_t pseudo_random_function;
+	
+	/**
+	 * Key length of prf.
+	 */
+	u_int16_t pseudo_random_function_key_length;
+	
+	/**
+	 * Diffie hellman group
+	 */
+	diffie_hellman_group_t diffie_hellman_group;
+};
+
+typedef struct init_config_t init_config_t;
+
+/**
+ * Represents a configuration class holding all needed informations for IKE_SA_INIT phase.
+ * 
+ * @ingroup config
+ * 
+ */
+struct init_config_t { 
+
+	/**
+	 * Get my host information as host_t object.
+	 * 
+	 * @warning Object is getting cloned and has to get destroyed by caller.
+	 * 
+	 * @param this	calling object
+	 * @return		host information as host_t object
+	 */
+	host_t * (*get_my_host) (init_config_t *this);
+
+	/**
+	 * Get other host information as host_t object.
+	 * 
+	 * @warning Object is getting cloned and has to get destroyed by caller.
+	 * 
+	 * @param this	calling object
+	 * @return		host information as host_t object
+	 */
+	host_t * (*get_other_host) (init_config_t *this);
+	
+	/**
+	 * Get the diffie hellman group to use as initiator with given priority.
+	 * 
+	 * 
+	 * @param this		calling object
+	 * @param priority 	priority of dh group number (starting at 1)
+	 * @return			diffie hellman group number for given priority or 
+	 * 					MODP_UNDEFINED for not supported priorities
+	 */
+	diffie_hellman_group_t (*get_dh_group_number) (init_config_t *this,size_t priority);
+	
+	/**
+	 * Returns a list of all supported ike_proposals of type ike_proposal_t *.
+	 * 
+	 * @warning array of ike_proposal_t has to get destroyed by the caller
+	 * 
+	 * @param this				calling object
+	 * @param proposals			first proposal in a array
+	 * @return 					number of proposals in array
+	 */
+	size_t (*get_proposals) (init_config_t *this,ike_proposal_t **proposals);
+	
+	/**
+	 * Adds a proposal with given priority to the current stored proposals
+	 * 
+	 * If allready a proposal with given priority is stored the other one is 
+	 * moved one priority back. If priority is higher then all other stored 
+	 * proposals, it is inserted as last one.
+	 * 
+	 * @param this				calling object
+	 * @param priority			priority of adding proposal
+	 * @param proposal			proposal to add
+	 */
+	void (*add_proposal) (init_config_t *this,size_t priority, ike_proposal_t proposal);
+	
+	/**
+	 * Select a proposed from suggested proposals.
+	 * 
+	 * 
+	 * @param this					calling object
+	 * @param suggested_proposals	first proposal in a array
+	 * @param proposal_count		number of suggested proposals in array
+	 * @param selected_proposal		the ike_proposal_t pointing to is set
+	 * @return						
+	 * 								- SUCCESS if a proposal was selected
+	 * 								- NOT_FOUND if none of suggested proposals is supported
+	 */
+	status_t (*select_proposal) (init_config_t *this, ike_proposal_t *proposals, size_t proposal_count, ike_proposal_t *selected_proposal);
+	
+	/**
+	 * Destroys a init_config_t object.
+	 * 
+	 * @param this	calling object
+	 */
+	void (*destroy) (init_config_t *this);
+};
+
+/**
+ * Creates a init_config_t object.
+ * 
+ * @return  pointer to created init_config_t object.
+ * 
+ * @ingroup config
+ */
+init_config_t * init_config_create(char * my_ip, char *other_ip, u_int16_t my_port, u_int16_t other_port);
+
 #endif //_INIT_CONFIG_H_