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a8c09d8cc0044fbff6c89c2e8966427ee7ed1ef0
strongswan-ext/Source/charon/threads/stroke_interface.c
T
Martin Willi a8c09d8cc0 - identification_t supports now almost all id types 
- x509 certificates work with identification_t now
- fixes here, fixes there
2006-04-24 10:40:10 +00:00

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/**
* @file stroke.c
*
* @brief Implementation of stroke_t.
*
*/
/*
* Copyright (C) 2006 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 <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <pthread.h>
#include "stroke_interface.h"
#include <stroke.h>
#include <types.h>
#include <daemon.h>
#include <crypto/x509.h>
#include <queues/jobs/initiate_ike_sa_job.h>
struct sockaddr_un socket_addr = { AF_UNIX, STROKE_SOCKET};
typedef struct configuration_entry_t configuration_entry_t;
/**
* A configuration entry combines a configuration name with a connection
* and a policy.
*
* @b Constructors:
* - configuration_entry_create()
*/
struct configuration_entry_t {
/**
* Configuration name.
*
*/
char *name;
/**
* Configuration for IKE_SA_INIT exchange.
*/
connection_t *connection;
/**
* Configuration for all phases after IKE_SA_INIT exchange.
*/
policy_t *policy;
/**
* Public key of other peer
*/
rsa_public_key_t *public_key;
/**
* Own private key
*/
rsa_private_key_t *private_key;
/**
* Destroys a configuration_entry_t
*/
void (*destroy) (configuration_entry_t *this);
};
/**
* Implementation of configuration_entry_t.destroy.
*/
static void configuration_entry_destroy (configuration_entry_t *this)
{
this->connection->destroy(this->connection);
this->policy->destroy(this->policy);
if (this->public_key)
{
this->public_key->destroy(this->public_key);
}
free(this->name);
free(this);
}
/**
* Creates a configuration_entry_t object.
*/
static configuration_entry_t * configuration_entry_create(char *name, connection_t* connection, policy_t *policy,
rsa_private_key_t *private_key, rsa_public_key_t *public_key)
{
configuration_entry_t *entry = malloc_thing(configuration_entry_t);
/* functions */
entry->destroy = configuration_entry_destroy;
/* private data */
entry->connection = connection;
entry->policy = policy;
entry->public_key = public_key;
entry->private_key = private_key;
entry->name = malloc(strlen(name) + 1);
strcpy(entry->name, name);
return entry;
}
typedef struct private_stroke_t private_stroke_t;
/**
* Private data of an stroke_t object.
*/
struct private_stroke_t {
/**
* Public part of stroke_t object.
*/
stroke_t public;
/**
* Holding all configurations.
*/
linked_list_t *configurations;
/**
* The list of RSA private keys accessible through crendial_store_t interface
*/
linked_list_t *private_keys;
/**
* Assigned logger_t object in charon.
*/
logger_t *logger;
/**
* Logger which logs to stroke
*/
logger_t *stroke_logger;
/**
* Unix socket to listen for strokes
*/
int socket;
/**
* Thread which reads from the socket
*/
pthread_t assigned_thread;
/**
* Read from the socket and handle stroke messages
*/
void (*stroke_receive) (private_stroke_t *this);
/**
* find a connection in the config list by name
*/
connection_t *(*get_connection_by_name) (private_stroke_t *this, char *name);
};
/**
* Helper function which corrects the string pointers
* in a stroke_msg_t. Strings in a stroke_msg sent over "wire"
* contains RELATIVE addresses (relative to the beginning of the
* stroke_msg). They must be corrected if they reach our address
* space...
*/
static void pop_string(stroke_msg_t *msg, char **string)
{
/* check for sanity of string pointer and string */
if (*string == NULL)
{
*string = "";
}
else if (string < (char**)msg ||
string > (char**)msg + sizeof(stroke_msg_t) ||
*string < (char*)msg->buffer - (u_int)msg ||
*string > (char*)(u_int)msg->length)
{
*string = "(invalid char* in stroke msg)";
}
else
{
*string = (char*)msg + (u_int)*string;
}
}
/**
* Find the private key for a public key
*/
static rsa_private_key_t *find_private_key(private_stroke_t *this, rsa_public_key_t *public_key)
{
rsa_private_key_t *private_key = NULL;
iterator_t *iterator;
this->logger->log(this->logger, CONTROL|LEVEL2, "Looking up private key by public key...");
iterator = this->private_keys->create_iterator(this->private_keys, TRUE);
while (iterator->has_next(iterator))
{
iterator->current(iterator, (void**)&private_key);
if (private_key->belongs_to(private_key, public_key))
{
this->logger->log(this->logger, CONTROL|LEVEL2, "found a match");
break;
}
this->logger->log(this->logger, CONTROL|LEVEL2, "this one did not match");
}
iterator->destroy(iterator);
return private_key;
}
/**
* Load all private keys form "/etc/ipsec.d/private/"
*/
static void load_private_keys(private_stroke_t *this)
{
struct dirent* entry;
struct stat stb;
DIR* dir;
rsa_private_key_t *key;
/* currently only unencrypted binary DER files are loaded */
dir = opendir(PRIVATE_KEY_DIR);
if (dir == NULL || chdir(PRIVATE_KEY_DIR) == -1) {
this->logger->log(this->logger, ERROR, "error opening private key directory \"%s\"", PRIVATE_KEY_DIR);
return;
}
while ((entry = readdir(dir)) != NULL)
{
if (stat(entry->d_name, &stb) == -1)
{
continue;
}
/* try to parse all regular files */
if (stb.st_mode & S_IFREG)
{
key = rsa_private_key_create_from_file(entry->d_name, NULL);
if (key)
{
this->private_keys->insert_last(this->private_keys, (void*)key);
this->logger->log(this->logger, CONTROL|LEVEL1, "loaded private key \"%s%s\"",
PRIVATE_KEY_DIR, entry->d_name);
}
else
{
this->logger->log(this->logger, ERROR, "private key \"%s%s\" invalid, skipped",
PRIVATE_KEY_DIR, entry->d_name);
}
}
}
closedir(dir);
}
/**
* Add a connection to the configuration list
*/
static void stroke_add_conn(private_stroke_t *this, stroke_msg_t *msg)
{
connection_t *connection;
policy_t *policy;
identification_t *my_id, *other_id;
host_t *my_host, *other_host, *my_subnet, *other_subnet;
proposal_t *proposal;
traffic_selector_t *my_ts, *other_ts;
x509_t *my_cert, *other_cert;
rsa_private_key_t *private_key = NULL;
rsa_public_key_t *public_key = NULL;
pop_string(msg, &msg->add_conn.name);
pop_string(msg, &msg->add_conn.me.address);
pop_string(msg, &msg->add_conn.other.address);
pop_string(msg, &msg->add_conn.me.id);
pop_string(msg, &msg->add_conn.other.id);
pop_string(msg, &msg->add_conn.me.cert);
pop_string(msg, &msg->add_conn.other.cert);
pop_string(msg, &msg->add_conn.me.subnet);
pop_string(msg, &msg->add_conn.other.subnet);
this->logger->log(this->logger, CONTROL, "received stroke: add connection \"%s\"", msg->add_conn.name);
my_host = host_create(AF_INET, msg->add_conn.me.address, 500);
if (my_host == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid host: %s", msg->add_conn.me.address);
return;
}
other_host = host_create(AF_INET, msg->add_conn.other.address, 500);
if (other_host == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid host: %s", msg->add_conn.other.address);
my_host->destroy(my_host);
return;
}
my_id = identification_create_from_string(*msg->add_conn.me.id ?
msg->add_conn.me.id : msg->add_conn.me.address);
if (my_id == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid id: %s", msg->add_conn.me.id);
my_host->destroy(my_host);
other_host->destroy(other_host);
return;
}
other_id = identification_create_from_string(*msg->add_conn.other.id ?
msg->add_conn.other.id : msg->add_conn.other.address);
if (other_id == NULL)
{
my_host->destroy(my_host);
other_host->destroy(other_host);
my_id->destroy(my_id);
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid id: %s", msg->add_conn.other.id);
return;
}
my_subnet = host_create(AF_INET, *msg->add_conn.me.subnet ? msg->add_conn.me.subnet : msg->add_conn.me.address, 500);
if (my_subnet == NULL)
{
my_host->destroy(my_host);
other_host->destroy(other_host);
my_id->destroy(my_id);
other_id->destroy(other_id);
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid subnet: %s", msg->add_conn.me.subnet);
return;
}
other_subnet = host_create(AF_INET, *msg->add_conn.other.subnet ? msg->add_conn.other.subnet : msg->add_conn.other.address, 500);
if (other_subnet == NULL)
{
my_host->destroy(my_host);
other_host->destroy(other_host);
my_id->destroy(my_id);
other_id->destroy(other_id);
my_subnet->destroy(my_subnet);
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid subnet: %s", msg->add_conn.me.subnet);
return;
}
my_ts = traffic_selector_create_from_subnet(my_subnet, *msg->add_conn.me.subnet ? msg->add_conn.me.subnet_mask : 32);
my_subnet->destroy(my_subnet);
other_ts = traffic_selector_create_from_subnet(other_subnet, *msg->add_conn.other.subnet ? msg->add_conn.other.subnet_mask : 32);
other_subnet->destroy(other_subnet);
if (charon->socket->is_listening_on(charon->socket, other_host))
{
this->stroke_logger->log(this->stroke_logger, CONTROL|LEVEL1, "left is other host, switching");
host_t *tmp_host = my_host;
identification_t *tmp_id = my_id;
traffic_selector_t *tmp_ts = my_ts;
char *tmp_cert = msg->add_conn.me.cert;
my_host = other_host;
other_host = tmp_host;
my_id = other_id;
other_id = tmp_id;
my_ts = other_ts;
other_ts = tmp_ts;
msg->add_conn.me.cert = msg->add_conn.other.cert;
msg->add_conn.other.cert = tmp_cert;
}
else if (charon->socket->is_listening_on(charon->socket, my_host))
{
this->stroke_logger->log(this->stroke_logger, CONTROL|LEVEL1, "left is own host, not switching");
}
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "left nor right host is our, aborting");
my_host->destroy(my_host);
other_host->destroy(other_host);
my_id->destroy(my_id);
other_id->destroy(other_id);
my_ts->destroy(my_ts);
other_ts->destroy(other_ts);
return;
}
connection = connection_create(my_host, other_host, my_id->clone(my_id), other_id->clone(other_id),
RSA_DIGITAL_SIGNATURE);
proposal = proposal_create(1);
proposal->add_algorithm(proposal, PROTO_IKE, ENCRYPTION_ALGORITHM, ENCR_AES_CBC, 16);
proposal->add_algorithm(proposal, PROTO_IKE, INTEGRITY_ALGORITHM, AUTH_HMAC_SHA1_96, 0);
proposal->add_algorithm(proposal, PROTO_IKE, INTEGRITY_ALGORITHM, AUTH_HMAC_MD5_96, 0);
proposal->add_algorithm(proposal, PROTO_IKE, PSEUDO_RANDOM_FUNCTION, PRF_HMAC_SHA1, 0);
proposal->add_algorithm(proposal, PROTO_IKE, PSEUDO_RANDOM_FUNCTION, PRF_HMAC_MD5, 0);
proposal->add_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, MODP_2048_BIT, 0);
proposal->add_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, MODP_1536_BIT, 0);
proposal->add_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, MODP_1024_BIT, 0);
proposal->add_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, MODP_4096_BIT, 0);
proposal->add_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, MODP_8192_BIT, 0);
connection->add_proposal(connection, proposal);
policy = policy_create(my_id, other_id);
proposal = proposal_create(1);
proposal->add_algorithm(proposal, PROTO_ESP, ENCRYPTION_ALGORITHM, ENCR_AES_CBC, 16);
proposal->add_algorithm(proposal, PROTO_ESP, INTEGRITY_ALGORITHM, AUTH_HMAC_SHA1_96, 0);
proposal->add_algorithm(proposal, PROTO_ESP, INTEGRITY_ALGORITHM, AUTH_HMAC_MD5_96, 0);
policy->add_proposal(policy, proposal);
policy->add_my_traffic_selector(policy, my_ts);
policy->add_other_traffic_selector(policy, other_ts);
chdir(CERTIFICATE_DIR);
my_cert = x509_create_from_file(msg->add_conn.me.cert);
if (my_cert == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "loading own certificate \"%s%s\" failed",
CERTIFICATE_DIR, msg->add_conn.me.cert);
}
else
{
public_key = my_cert->get_public_key(my_cert);
private_key = find_private_key(this, public_key);
public_key->destroy(public_key);
if (private_key)
{
this->stroke_logger->log(this->stroke_logger, CONTROL|LEVEL1, "found private key for certificate \"%s%s\"",
CERTIFICATE_DIR, msg->add_conn.me.cert);
}
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "no private key for certificate \"%s%s\" found",
CERTIFICATE_DIR, msg->add_conn.me.cert);
}
my_cert->destroy(my_cert);
}
other_cert = x509_create_from_file(msg->add_conn.other.cert);
public_key = NULL;
if (other_cert == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "loading peers certificate \"%s%s\" failed",
CERTIFICATE_DIR, msg->add_conn.other.cert);
}
else
{
public_key = other_cert->get_public_key(other_cert);
this->stroke_logger->log(this->stroke_logger, CONTROL|LEVEL1, "loaded certificate \"%s%s\" (%p)",
CERTIFICATE_DIR, msg->add_conn.other.cert, public_key);
other_cert->destroy(other_cert);
}
this->configurations->insert_last(this->configurations,
configuration_entry_create(msg->add_conn.name, connection, policy, private_key, public_key));
this->stroke_logger->log(this->stroke_logger, CONTROL|LEVEL1, "connection \"%s\" added (%d in store)",
msg->add_conn.name,
this->configurations->get_count(this->configurations));
}
/**
* initiate a connection by name
*/
static void stroke_initiate(private_stroke_t *this, stroke_msg_t *msg)
{
initiate_ike_sa_job_t *job;
connection_t *connection;
pop_string(msg, &(msg->initiate.name));
this->logger->log(this->logger, CONTROL, "received stroke: initiate \"%s\"", msg->initiate.name);
connection = this->get_connection_by_name(this, msg->initiate.name);
if (connection == NULL)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "could not find a connection named \"%s\"", msg->initiate.name);
}
else
{
job = initiate_ike_sa_job_create(connection->clone(connection));
charon->job_queue->add(charon->job_queue, (job_t*)job);
}
}
/**
* terminate a connection by name
*/
static void stroke_terminate(private_stroke_t *this, stroke_msg_t *msg)
{
connection_t *connection;
ike_sa_t *ike_sa;
host_t *my_host, *other_host;
status_t status;
pop_string(msg, &(msg->terminate.name));
this->logger->log(this->logger, CONTROL, "received stroke: terminate \"%s\"", msg->terminate.name);
connection = this->get_connection_by_name(this, msg->terminate.name);
if (connection)
{
my_host = connection->get_my_host(connection);
other_host = connection->get_other_host(connection);
status = charon->ike_sa_manager->checkout_by_hosts(charon->ike_sa_manager,
my_host, other_host, &ike_sa);
if (status == SUCCESS)
{
this->stroke_logger->log(this->stroke_logger, CONTROL, "deleting IKE SA between %s - %s",
my_host->get_address(my_host), other_host->get_address(other_host));
charon->ike_sa_manager->checkin_and_delete(charon->ike_sa_manager, ike_sa);
}
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "no active connection found between %s - %s",
my_host->get_address(my_host), other_host->get_address(other_host));
}
}
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "could not find a connection named \"%s\"", msg->terminate.name);
}
}
/**
* show status of (established) connections
*/
static void stroke_status(private_stroke_t *this, stroke_msg_t *msg)
{
linked_list_t *list;
iterator_t *iterator;
status_t status;
list = charon->ike_sa_manager->get_ike_sa_list(charon->ike_sa_manager);
iterator = list->create_iterator(list, TRUE);
while (iterator->has_next(iterator))
{
ike_sa_id_t *ike_sa_id;
ike_sa_t *ike_sa;
iterator->current(iterator, (void**)&ike_sa_id);
status = charon->ike_sa_manager->checkout(charon->ike_sa_manager, ike_sa_id, &ike_sa);
if (status == SUCCESS)
{
host_t *me, *other;
me = ike_sa->get_my_host(ike_sa);
other = ike_sa->get_other_host(ike_sa);
this->stroke_logger->log(this->stroke_logger, CONTROL, "IKE SA in state %s as %s",
mapping_find(ike_sa_state_m, ike_sa->get_state(ike_sa)),
ike_sa_id->is_initiator ? "initiator" : "responder");
this->stroke_logger->log(this->stroke_logger, CONTROL, " SPIs: %15lld - %-15lld",
ike_sa_id->get_initiator_spi(ike_sa_id),
ike_sa_id->get_responder_spi(ike_sa_id));
this->stroke_logger->log(this->stroke_logger, CONTROL, " Addr: %15s - %-15s",
me->get_address(me), other->get_address(other));
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
}
ike_sa_id->destroy(ike_sa_id);
}
iterator->destroy(iterator);
list->destroy(list);
}
logger_context_t get_context(char *context)
{
if (strcasecmp(context, "ALL") == 0) return ALL_LOGGERS;
else if (strcasecmp(context, "PARSR") == 0) return PARSER;
else if (strcasecmp(context, "GNRAT") == 0) return GENERATOR;
else if (strcasecmp(context, "IKESA") == 0) return IKE_SA;
else if (strcasecmp(context, "SAMGR") == 0) return IKE_SA_MANAGER;
else if (strcasecmp(context, "CHDSA") == 0) return CHILD_SA;
else if (strcasecmp(context, "MESSG") == 0) return MESSAGE;
else if (strcasecmp(context, "TPOOL") == 0) return THREAD_POOL;
else if (strcasecmp(context, "WORKR") == 0) return WORKER;
else if (strcasecmp(context, "SCHED") == 0) return SCHEDULER;
else if (strcasecmp(context, "SENDR") == 0) return SENDER;
else if (strcasecmp(context, "RECVR") == 0) return RECEIVER;
else if (strcasecmp(context, "SOCKT") == 0) return SOCKET;
else if (strcasecmp(context, "TESTR") == 0) return TESTER;
else if (strcasecmp(context, "DAEMN") == 0) return DAEMON;
else if (strcasecmp(context, "CONFG") == 0) return CONFIG;
else if (strcasecmp(context, "ENCPL") == 0) return ENCRYPTION_PAYLOAD;
else if (strcasecmp(context, "PAYLD") == 0) return PAYLOAD;
else return -2;
}
/**
* set the type of logged messages in a context
*/
static void stroke_logtype(private_stroke_t *this, stroke_msg_t *msg)
{
pop_string(msg, &(msg->logtype.context));
pop_string(msg, &(msg->logtype.type));
this->logger->log(this->logger, CONTROL, "received stroke: logtype for %s", msg->logtype.context);
log_level_t level;
logger_context_t context = get_context(msg->logtype.context);
if (context == -2)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid context (%s)!", msg->logtype.context);
return;
}
if (strcasecmp(msg->logtype.type, "CONTROL") == 0) level = CONTROL;
else if (strcasecmp(msg->logtype.type, "ERROR") == 0) level = ERROR;
else if (strcasecmp(msg->logtype.type, "AUDIT") == 0) level = AUDIT;
else if (strcasecmp(msg->logtype.type, "RAW") == 0) level = RAW;
else if (strcasecmp(msg->logtype.type, "PRIVATE") == 0) level = PRIVATE;
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid type (%s)!", msg->logtype.type);
return;
}
if (msg->logtype.enable)
{
logger_manager->enable_log_level(logger_manager, context, level);
}
else
{
logger_manager->disable_log_level(logger_manager, context, level);
}
}
/**
* set the verbosity of a logger
*/
static void stroke_loglevel(private_stroke_t *this, stroke_msg_t *msg)
{
pop_string(msg, &(msg->loglevel.context));
this->logger->log(this->logger, CONTROL, "received stroke: loglevel for %s", msg->loglevel.context);
log_level_t level;
logger_context_t context = get_context(msg->loglevel.context);
if (context == -2)
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid context (%s)!", msg->loglevel.context);
return;
}
if (msg->loglevel.level == 0)
{
level = LEVEL0;
}
else if (msg->loglevel.level == 1)
{
level = LEVEL1;
}
else if (msg->loglevel.level == 2)
{
level = LEVEL2;
}
else if (msg->loglevel.level == 3)
{
level = LEVEL3;
}
else
{
this->stroke_logger->log(this->stroke_logger, ERROR, "invalid level (%d)!", msg->loglevel.level);
return;
}
logger_manager->enable_log_level(logger_manager, context, level);
}
/**
* Implementation of private_stroke_t.stroke_receive.
*/
static void stroke_receive(private_stroke_t *this)
{
stroke_msg_t *msg;
u_int16_t msg_length;
struct sockaddr_un strokeaddr;
int strokeaddrlen = sizeof(strokeaddr);
ssize_t bytes_read;
int strokefd;
FILE *strokefile;
int oldstate;
/* disable cancellation by default */
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
while (1)
{
/* wait for connections, but allow thread to terminate */
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
strokefd = accept(this->socket, (struct sockaddr *)&strokeaddr, &strokeaddrlen);
pthread_setcancelstate(oldstate, NULL);
if (strokefd < 0)
{
this->logger->log(this->logger, ERROR, "accepting stroke connection failed: %s", strerror(errno));
continue;
}
/* peek the length */
bytes_read = recv(strokefd, &msg_length, sizeof(msg_length), MSG_PEEK);
if (bytes_read != sizeof(msg_length))
{
this->logger->log(this->logger, ERROR, "reading lenght of stroke message failed");
close(strokefd);
continue;
}
/* read message */
msg = malloc(msg_length);
bytes_read = recv(strokefd, msg, msg_length, 0);
if (bytes_read != msg_length)
{
this->logger->log(this->logger, ERROR, "reading stroke message failed: %s");
close(strokefd);
continue;
}
strokefile = fdopen(dup(strokefd), "w");
if (strokefile == NULL)
{
this->logger->log(this->logger, ERROR, "opening stroke output channel failed:", strerror(errno));
close(strokefd);
free(msg);
continue;
}
this->stroke_logger = logger_create("-", CONTROL|ERROR, FALSE, strokefile);
this->logger->log_bytes(this->logger, RAW, "stroke message", (void*)msg, msg_length);
switch (msg->type)
{
case STR_INITIATE:
{
stroke_initiate(this, msg);
break;
}
case STR_TERMINATE:
{
stroke_terminate(this, msg);
break;
}
case STR_STATUS:
{
stroke_status(this, msg);
break;
}
case STR_ADD_CONN:
{
stroke_add_conn(this, msg);
break;
}
case STR_LOGTYPE:
{
stroke_logtype(this, msg);
break;
}
case STR_LOGLEVEL:
{
stroke_loglevel(this, msg);
break;
}
default:
this->logger->log(this->logger, ERROR, "received invalid stroke");
}
this->stroke_logger->destroy(this->stroke_logger);
fclose(strokefile);
close(strokefd);
free(msg);
}
}
/**
* Implementation of connection_store_t.get_connection_by_hosts.
*/
static connection_t *get_connection_by_hosts(connection_store_t *store, host_t *my_host, host_t *other_host)
{
private_stroke_t *this = (private_stroke_t*)((u_int8_t*)store - offsetof(stroke_t, connections));
iterator_t *iterator;
connection_t *found = NULL;
this->logger->log(this->logger, CONTROL|LEVEL1, "getting config for hosts %s - %s",
my_host->get_address(my_host), other_host->get_address(other_host));
iterator = this->configurations->create_iterator(this->configurations,TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *entry;
host_t *config_my_host, *config_other_host;
iterator->current(iterator,(void **) &entry);
config_my_host = entry->connection->get_my_host(entry->connection);
config_other_host = entry->connection->get_other_host(entry->connection);
/* first check if ip is equal */
if(config_other_host->ip_equals(config_other_host, other_host))
{
this->logger->log(this->logger, CONTROL|LEVEL2, "config entry with remote host %s",
config_other_host->get_address(config_other_host));
/* could be right one, check my_host for default route*/
if (config_my_host->is_default_route(config_my_host))
{
found = entry->connection->clone(entry->connection);
break;
}
/* check now if host informations are the same */
else if (config_my_host->ip_equals(config_my_host,my_host))
{
found = entry->connection->clone(entry->connection);
break;
}
}
/* Then check for wildcard hosts!
* TODO
* actually its only checked if other host with default route can be found! */
else if (config_other_host->is_default_route(config_other_host))
{
/* could be right one, check my_host for default route*/
if (config_my_host->is_default_route(config_my_host))
{
found = entry->connection->clone(entry->connection);
break;
}
/* check now if host informations are the same */
else if (config_my_host->ip_equals(config_my_host,my_host))
{
found = entry->connection->clone(entry->connection);
break;
}
}
}
iterator->destroy(iterator);
/* apply hosts as they are supplied since my_host may be %defaultroute, and other_host may be %any. */
if (found)
{
found->update_my_host(found, my_host->clone(my_host));
found->update_other_host(found, other_host->clone(other_host));
}
return found;
}
/**
* Implementation of connection_store_t.get_connection_by_ids.
*/
static connection_t *get_connection_by_ids(connection_store_t *store, identification_t *my_id, identification_t *other_id)
{
private_stroke_t *this = (private_stroke_t*)((u_int8_t*)store - offsetof(stroke_t, connections));
iterator_t *iterator;
connection_t *found = NULL;
this->logger->log(this->logger, CONTROL|LEVEL1, "getting config for ids %s - %s",
my_id->get_string(my_id), other_id->get_string(other_id));
iterator = this->configurations->create_iterator(this->configurations,TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *entry;
identification_t *config_my_id, *config_other_id;
iterator->current(iterator,(void **) &entry);
config_my_id = entry->connection->get_my_id(entry->connection);
config_other_id = entry->connection->get_other_id(entry->connection);
/* first check if ids are equal
* TODO: Add wildcard checks */
if (config_other_id->equals(config_other_id, other_id) &&
config_my_id->equals(config_my_id, my_id))
{
this->logger->log(this->logger, CONTROL|LEVEL2, "config entry with remote id %s",
config_other_id->get_string(config_other_id));
found = entry->connection->clone(entry->connection);
break;
}
}
iterator->destroy(iterator);
return found;
}
/**
* Implementation of private_stroke_t.get_connection_by_name.
*/
static connection_t *get_connection_by_name(private_stroke_t *this, char *name)
{
iterator_t *iterator;
connection_t *found = NULL;
iterator = this->configurations->create_iterator(this->configurations, TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *entry;
iterator->current(iterator,(void **) &entry);
if (strcmp(entry->name,name) == 0)
{
/* found configuration */
found = entry->connection;
break;
}
}
iterator->destroy(iterator);
return found;
}
/**
* Implementation of policy_store_t.get_policy.
*/
static policy_t *get_policy(policy_store_t *store,identification_t *my_id, identification_t *other_id)
{
private_stroke_t *this = (private_stroke_t*)((u_int8_t*)store - offsetof(stroke_t, policies));
iterator_t *iterator;
policy_t *found = NULL;
iterator = this->configurations->create_iterator(this->configurations, TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *entry;
iterator->current(iterator,(void **) &entry);
identification_t *config_my_id = entry->policy->get_my_id(entry->policy);
identification_t *config_other_id = entry->policy->get_other_id(entry->policy);
/* check other host first */
if (config_other_id->belongs_to(config_other_id, other_id))
{
/* get it if my_id not specified */
if (my_id == NULL)
{
found = entry->policy->clone(entry->policy);
break;
}
if (config_my_id->belongs_to(config_my_id, my_id))
{
found = entry->policy->clone(entry->policy);
break;
}
}
}
iterator->destroy(iterator);
/* apply IDs as they are requsted, since they may be configured as %any or such */
if (found)
{
if (my_id)
{
found->update_my_id(found, my_id->clone(my_id));
}
found->update_other_id(found, other_id->clone(other_id));
}
return found;
}
/**
* Implementation of credential_store_t.get_shared_secret.
*/
static status_t get_shared_secret(credential_store_t *this, identification_t *identification, chunk_t *preshared_secret)
{
char *secret = "schluessel\n";
preshared_secret->ptr = secret;
preshared_secret->len = strlen(secret) + 1;
*preshared_secret = chunk_clone(*preshared_secret);
return SUCCESS;
}
/**
* Implementation of credential_store_t.get_rsa_public_key.
*/
static status_t get_rsa_public_key(credential_store_t *store, identification_t *identification, rsa_public_key_t **public_key)
{
private_stroke_t *this = (private_stroke_t*)((u_int8_t*)store - offsetof(stroke_t, credentials));
iterator_t *iterator;
this->logger->log(this->logger, CONTROL|LEVEL2, "Looking for public key for %s",
identification->get_string(identification));
iterator = this->configurations->create_iterator(this->configurations, TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *config;
iterator->current(iterator, (void**)&config);
identification_t *stored = config->policy->get_other_id(config->policy);
this->logger->log(this->logger, CONTROL|LEVEL2, "there is one for %s",
stored->get_string(stored));
if (identification->equals(identification, stored))
{
this->logger->log(this->logger, CONTROL|LEVEL2, "found a match: %p",
config->public_key);
if (config->public_key)
{
iterator->destroy(iterator);
*public_key = config->public_key->clone(config->public_key);
return SUCCESS;
}
}
}
iterator->destroy(iterator);
return NOT_FOUND;
}
/**
* Implementation of credential_store_t.get_rsa_private_key.
*/
static status_t get_rsa_private_key(credential_store_t *store, identification_t *identification, rsa_private_key_t **private_key)
{
private_stroke_t *this = (private_stroke_t*)((u_int8_t*)store - offsetof(stroke_t, credentials));
iterator_t *iterator;
iterator = this->configurations->create_iterator(this->configurations, TRUE);
while (iterator->has_next(iterator))
{
configuration_entry_t *config;
iterator->current(iterator, (void**)&config);
identification_t *stored = config->policy->get_my_id(config->policy);
if (identification->equals(identification, stored))
{
if (config->private_key)
{
iterator->destroy(iterator);
*private_key = config->private_key->clone(config->private_key);
return SUCCESS;
}
}
}
iterator->destroy(iterator);
return NOT_FOUND;
}
/**
* Implementation of stroke_t.destroy.
*/
static void destroy(private_stroke_t *this)
{
configuration_entry_t *entry;
rsa_private_key_t *priv_key;
pthread_cancel(this->assigned_thread);
pthread_join(this->assigned_thread, NULL);
while (this->configurations->remove_first(this->configurations, (void **)&entry) == SUCCESS)
{
entry->destroy(entry);
}
this->configurations->destroy(this->configurations);
while (this->private_keys->remove_first(this->private_keys, (void **)&priv_key) == SUCCESS)
{
priv_key->destroy(priv_key);
}
this->private_keys->destroy(this->private_keys);
close(this->socket);
unlink(socket_addr.sun_path);
free(this);
}
/**
* Dummy function which does nothing.
* Used for connection_store_t.destroy and policy_store_t.destroy,
* since destruction is done in store_t's destructor...
*/
void do_nothing(void *nothing)
{
return;
}
/*
* Described in header-file
*/
stroke_t *stroke_create()
{
private_stroke_t *this = malloc_thing(private_stroke_t);
mode_t old;
/* public functions */
this->public.connections.get_connection_by_ids = get_connection_by_ids;
this->public.connections.get_connection_by_hosts = get_connection_by_hosts;
this->public.connections.destroy = (void (*) (connection_store_t*))do_nothing;
this->public.policies.get_policy = get_policy;
this->public.policies.destroy = (void (*) (policy_store_t*))do_nothing;
this->public.credentials.get_shared_secret = (status_t (*)(credential_store_t*,identification_t*,chunk_t*))get_shared_secret;
this->public.credentials.get_rsa_public_key = (status_t (*)(credential_store_t*,identification_t*,rsa_public_key_t**))get_rsa_public_key;
this->public.credentials.get_rsa_private_key = (status_t (*)(credential_store_t*,identification_t*,rsa_private_key_t**))get_rsa_private_key;
this->public.credentials.destroy = (void (*) (credential_store_t*))do_nothing;
this->public.destroy = (void (*)(stroke_t*))destroy;
/* private functions */
this->stroke_receive = stroke_receive;
this->get_connection_by_name = get_connection_by_name;
this->logger = logger_manager->get_logger(logger_manager, CONFIG);
/* set up unix socket */
this->socket = socket(AF_UNIX, SOCK_STREAM, 0);
if (this->socket == -1)
{
this->logger->log(this->logger, ERROR, "could not create whack socket");
free(this);
return NULL;
}
old = umask(~S_IRWXU);
if (bind(this->socket, (struct sockaddr *)&socket_addr, sizeof(socket_addr)) < 0)
{
this->logger->log(this->logger, ERROR, "could not bind stroke socket: %s", strerror(errno));
close(this->socket);
free(this);
return NULL;
}
umask(old);
if (listen(this->socket, 0) < 0)
{
this->logger->log(this->logger, ERROR, "could not listen on stroke socket: %s", strerror(errno));
close(this->socket);
unlink(socket_addr.sun_path);
free(this);
return NULL;
}
/* start a thread reading from the socket */
if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))this->stroke_receive, this) != 0)
{
this->logger->log(this->logger, ERROR, "Could not spawn stroke thread");
close(this->socket);
unlink(socket_addr.sun_path);
free(this);
return NULL;
}
/* private variables */
this->configurations = linked_list_create();
this->private_keys = linked_list_create();
load_private_keys(this);
return (&this->public);
}
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