current state

2005-11-21 16:41:24 +00:00
parent f0d14d2c56
commit 8323a9c120
17 changed files with 1605 additions and 1137 deletions
@@ -22,7 +22,16 @@
 
 #include "initiator_init.h"

+
+#include "state.h"
+#include "ike_sa_init_requested.h"
+#include "../globals.h"
 #include "../utils/allocator.h"
+#include "../transforms/diffie_hellman.h"
+#include "../payloads/sa_payload.h"
+#include "../payloads/ke_payload.h"
+#include "../payloads/nonce_payload.h"
+

 /**
 * Private data of a initiator_init_t object.
@@ -35,10 +44,363 @@ struct private_initiator_init_s {
 	 */
 	initiator_init_t public;
 	
+	/**
+	 * Assigned IKE_SA
+	 */
+	protected_ike_sa_t *ike_sa;
+	
+	/**
+	 * Diffie hellman object
+	 */
+	diffie_hellman_t *diffie_hellman;
+	
+	/**
+	 * DH group number
+	 */
+	u_int16_t dh_group_number;
+	
+	/**
+	 * DH group priority
+	 */
+	u_int16_t dh_group_priority;
+	
+	/**
+	 * Sent nonce
+	 */
+	chunk_t sent_nonce;
+	
+	/**
+	 * Proposals used to initiate connection
+	 */
+	linked_list_t *proposals;
+
+	/**
+	 * Logger used to log data 
+	 * 
+	 * Is logger of ike_sa!
+	 */
+	logger_t *logger;
+	
+	status_t (*build_sa_payload) (private_initiator_init_t *this, payload_t **payload);
+	status_t (*build_ke_payload) (private_initiator_init_t *this, payload_t **payload);
+	status_t (*build_nonce_payload) (private_initiator_init_t *this, payload_t **payload);	
+	
+	status_t (*destroy_after_state_change) (private_initiator_init_t *this);
 };

 static status_t initiate_connection (private_initiator_init_t *this, char *name, state_t **new_state)
 {
+	message_t *message;
+	payload_t *payload;
+	packet_t *packet;
+	status_t status;
+	linked_list_iterator_t *proposal_iterator;
+	ike_sa_init_requested_t *next_state;
+
+	
+	this->logger->log(this->logger, CONTROL, "Initializing connection %s",name);
+	
+	status = global_configuration_manager->get_local_host(global_configuration_manager, name, &(this->ike_sa->me.host));
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR | MORE, "Could not retrieve local host configuration information for %s",name);
+		return INVALID_ARG;
+	}
+	
+	status = global_configuration_manager->get_remote_host(global_configuration_manager, name, &(this->ike_sa->other.host));
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR | MORE, "Could not retrieve remote host configuration information for %s",name);
+		return INVALID_ARG;
+	}
+	
+	status = global_configuration_manager->get_dh_group_number(global_configuration_manager, name, &(this->dh_group_number), this->dh_group_priority);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR | MORE, "Could not retrieve DH group number for %s",name);
+		return INVALID_ARG;
+	}
+
+	status = this->proposals->create_iterator(this->proposals, &proposal_iterator, FALSE);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Fatal error: Could not create iterator on list for proposals");
+		return status;	
+	}
+	
+	status = global_configuration_manager->get_proposals_for_host(global_configuration_manager, this->ike_sa->other.host, proposal_iterator);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR | MORE, "Could not retrieve Proposals for %s",name);
+		return status;
+	}
+	/* not needed anymore */
+	proposal_iterator->destroy(proposal_iterator);
+	
+	this	->logger->log(this->logger, CONTROL|MOST, "create diffie hellman object");
+	this->diffie_hellman = diffie_hellman_create(this->dh_group_number);
+	
+	if (this->diffie_hellman == NULL)
+	{
+		this->logger->log(this->logger, ERROR, "Object of type diffie_hellman_t could not be created!");
+		return FAILED;			
+	}
+	
+	
+	if (this->ike_sa->randomizer->allocate_pseudo_random_bytes(this->ike_sa->randomizer, NONCE_SIZE, &(this->sent_nonce)) != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Could not create nonce!");
+		return OUT_OF_RES;
+	}
+		
+	
+	/* going to build message */
+	status = this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, TRUE, &message);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not build message");
+		return status;
+	}
+
+	/* build SA payload */		
+	status = this->build_sa_payload(this, &payload);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not build SA payload");
+		message->destroy(message);
+		return status;
+	}
+	
+	this	->logger->log(this->logger, CONTROL|MOST, "add SA payload to message");
+	status = message->add_payload(message, payload);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not add SA payload to message");
+		message->destroy(message);
+		return status;
+	}
+
+	
+	/* build KE payload */
+	status = this->build_ke_payload(this, &payload);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not build KE payload");
+		message->destroy(message);
+		return status;
+	}
+
+	this	->logger->log(this->logger, CONTROL|MOST, "add KE payload to message");
+	status = message->add_payload(message, payload);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not add KE payload to message");
+		message->destroy(message);
+		return status;
+	}
+	
+	/* build Nonce payload */
+	status = this->build_nonce_payload(this, &payload);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Could not build NONCE payload");
+		message->destroy(message);
+		return status;
+	}
+
+	this	->logger->log(this->logger, CONTROL|MOST, "add nonce payload to message");
+	status = message->add_payload(message, payload);
+	if (status != SUCCESS)
+	{	
+		this->logger->log(this->logger, ERROR, "Could not add nonce payload to message");
+		message->destroy(message);
+		return status;
+	}
+
+	/* generate packet */	
+	this	->logger->log(this->logger, CONTROL|MOST, "generate packet from message");
+	status = message->generate(message, &packet);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Fatal error: could not generate packet from message");
+		message->destroy(message);
+		return status;
+	}
+	
+	this	->logger->log(this->logger, CONTROL|MOST, "Add packet to global send queue");
+	status = global_send_queue->add(global_send_queue, packet);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Could not add packet to send queue");
+		message->destroy(message);
+		return status;
+	}
+
+	if (	this->ike_sa->last_requested_message != NULL)
+	{
+		/* destroy message */
+		this	->logger->log(this->logger, CONTROL|MOST, "Destroy stored last requested message");
+		this->ike_sa->last_requested_message->destroy(this->ike_sa->last_requested_message);
+	}
+
+	this->ike_sa->last_requested_message	 = message;
+
+	/* message counter can now be increased */
+	this->ike_sa->message_id_out++;
+	
+	
+	/* state can now be changed */
+	next_state = ike_sa_init_requested_create(this->ike_sa,this->diffie_hellman,this->sent_nonce);
+
+	if (next_state == NULL)
+	{
+		this	->logger->log(this->logger, ERROR, "Fatal error: could not create next state object of type ike_sa_init_requested_t");
+		return FAILED;
+	}
+
+	/* state has NOW changed :-) */
+	this	->logger->log(this->logger, CONTROL|MORE, "Change state of IKE_SA from %s to %s",mapping_find(ike_sa_state_m,INITIATOR_INIT),mapping_find(ike_sa_state_m,IKE_SA_INIT_REQUESTED) );
+
+	this->destroy_after_state_change(this);
+
+	*new_state = (state_t *) next_state;
+
+	return SUCCESS;
+}
+
+/**
+ * implements private_initiator_init_t.build_sa_payload
+ */
+static status_t build_sa_payload(private_initiator_init_t *this, payload_t **payload)
+{
+	sa_payload_t* sa_payload;
+	linked_list_iterator_t *proposal_iterator;
+	status_t status;
+	
+	
+	/* SA payload takes proposals from this->ike_sa_init_data.proposals and writes them to the created sa_payload */
+
+	this->logger->log(this->logger, CONTROL|MORE, "building sa payload");
+	
+	status = this->proposals->create_iterator(this->proposals, &proposal_iterator, FALSE);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Fatal error: Could not create iterator on list for proposals");
+		return status;	
+	}
+	
+	sa_payload = sa_payload_create();
+	if (sa_payload == NULL)
+	{
+		this->logger->log(this->logger, ERROR, "Fatal error: Could not create SA payload object");
+		return OUT_OF_RES;
+	}
+	
+	while (proposal_iterator->has_next(proposal_iterator))
+	{
+		proposal_substructure_t *current_proposal;
+		proposal_substructure_t *current_proposal_clone;
+		status = proposal_iterator->current(proposal_iterator,(void **) &current_proposal);
+		if (status != SUCCESS)
+		{
+			this->logger->log(this->logger, ERROR, "Could not get current proposal needed to copy");
+			sa_payload->destroy(sa_payload);
+			return status;	
+		}
+		status = current_proposal->clone(current_proposal,&current_proposal_clone);
+		if (status != SUCCESS)
+		{
+			this->logger->log(this->logger, ERROR, "Could not clone current proposal");
+			sa_payload->destroy(sa_payload);
+			return status;	
+		}
+		
+		status = sa_payload->add_proposal_substructure(sa_payload,current_proposal_clone);
+		if (status != SUCCESS)
+		{
+			this->logger->log(this->logger, ERROR, "Could not add cloned proposal to SA payload");
+			sa_payload->destroy(sa_payload);
+			return status;	
+		}
+
+	}
+	
+	this->logger->log(this->logger, CONTROL|MORE, "sa payload builded");
+	
+	*payload = (payload_t *) sa_payload;
+	
+	return SUCCESS;
+}
+
+/**
+ * implements private_initiator_init_t.build_ke_payload
+ */
+static status_t build_ke_payload(private_initiator_init_t *this, payload_t **payload)
+{
+	ke_payload_t *ke_payload;
+	chunk_t key_data;
+	status_t status;
+
+	this->logger->log(this->logger, CONTROL|MORE, "building ke payload");
+	
+
+	this	->logger->log(this->logger, CONTROL|MORE, "get public dh value to send in ke payload");
+	status = this->diffie_hellman->get_my_public_value(this->diffie_hellman,&key_data);
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Could not get my DH public value");
+		return status;
+	}
+
+	ke_payload = ke_payload_create();
+	if (ke_payload == NULL)
+	{
+		this->logger->log(this->logger, ERROR, "Could not create KE payload");
+		allocator_free_chunk(key_data);
+		return OUT_OF_RES;	
+	}
+	ke_payload->set_dh_group_number(ke_payload, MODP_1024_BIT);
+	if (ke_payload->set_key_exchange_data(ke_payload, key_data) != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Could not set key exchange data of KE payload");
+		ke_payload->destroy(ke_payload);
+		allocator_free_chunk(key_data);
+		return OUT_OF_RES;
+	}
+	allocator_free_chunk(key_data);
+
+	*payload = (payload_t *) ke_payload;
+	return SUCCESS;			
+}
+
+/**
+ * implements private_initiator_init_t.build_nonce_payload
+ */
+static status_t build_nonce_payload(private_initiator_init_t *this, payload_t **payload)
+{
+	nonce_payload_t *nonce_payload;
+	status_t status;
+	
+	this->logger->log(this->logger, CONTROL|MORE, "building nonce payload");
+
+	nonce_payload = nonce_payload_create();
+	if (nonce_payload == NULL)
+	{	
+		this->logger->log(this->logger, ERROR, "Fatal error: could not create nonce payload object");
+		return OUT_OF_RES;	
+	}
+
+	status = nonce_payload->set_nonce(nonce_payload, this->sent_nonce);
+	
+	if (status != SUCCESS)
+	{
+		this->logger->log(this->logger, ERROR, "Fatal error: could not set nonce data of payload");
+		nonce_payload->destroy(nonce_payload);
+		return status;
+	}
+		
+	*payload = (payload_t *) nonce_payload;
+	
 	return SUCCESS;
 }

@@ -64,6 +426,41 @@ static ike_sa_state_t get_state(private_initiator_init_t *this)
 */
 static status_t destroy(private_initiator_init_t *this)
 {
+	/* destroy stored proposal */
+	this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals");
+	while (this->proposals->get_count(this->proposals) > 0)
+	{
+		proposal_substructure_t *current_proposal;
+		this->proposals->remove_first(this->proposals,(void **)&current_proposal);
+		current_proposal->destroy(current_proposal);
+	}
+	this->proposals->destroy(this->proposals);
+	
+	/* destroy diffie hellman object */
+	if (this->diffie_hellman != NULL)
+	{
+		this->logger->log(this->logger, CONTROL | MOST, "Destroy diffie_hellman_t object");
+		this->diffie_hellman->destroy(this->diffie_hellman);
+	}
+	
+	allocator_free(this);
+	return SUCCESS;
+}
+
+/**
+ * Implements private_initiator_init_t.destroy_after_state_change
+ */
+static status_t destroy_after_state_change (private_initiator_init_t *this)
+{
+	/* destroy stored proposal */
+	this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals");
+	while (this->proposals->get_count(this->proposals) > 0)
+	{
+		proposal_substructure_t *current_proposal;
+		this->proposals->remove_first(this->proposals,(void **)&current_proposal);
+		current_proposal->destroy(current_proposal);
+	}
+	this->proposals->destroy(this->proposals);
 	allocator_free(this);
 	return SUCCESS;
 }
@@ -71,7 +468,7 @@ static status_t destroy(private_initiator_init_t *this)
 /* 
 * Described in header.
 */
-initiator_init_t *initiator_init_create()
+initiator_init_t *initiator_init_create(protected_ike_sa_t *ike_sa)
 {
 	private_initiator_init_t *this = allocator_alloc_thing(private_initiator_init_t);
 	
@@ -88,5 +485,24 @@ initiator_init_t *initiator_init_create()
 	/* public functions */
 	this->public.initiate_connection = (status_t (*)(initiator_init_t *, char *, state_t **)) initiate_connection;
 	
+	/* private functions */
+	this->build_sa_payload = build_sa_payload;
+	this->build_ke_payload = build_ke_payload;
+	this->build_nonce_payload = build_nonce_payload;
+	this->destroy_after_state_change = destroy_after_state_change;
+	
+	/* private data */
+	this->ike_sa = ike_sa;
+	this->logger = this->ike_sa->logger;
+	this->dh_group_priority = 1;
+	this->proposals = linked_list_create();
+	this->sent_nonce.ptr = NULL;
+	this->sent_nonce.len = 0;
+	if (this->proposals == NULL)
+	{
+		allocator_free(this);
+		return NULL;
+	}
+	
 	return &(this->public);
 }