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mod_rayo: support secure client-to-server connections

This commit is contained in:
Chris Rienzo 2013-07-15 18:52:09 -04:00
parent 9ef232a4bb
commit 3541d9d353
6 changed files with 103 additions and 65 deletions
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4
conf/rayo/autoload_configs/rayo.conf.xml
View File

@ -11,8 +11,10 @@
<param name="record-file-prefix" value="$${recordings_dir}/"/>
</record>
<!-- domain to use in from attribute of client messages -->
<!-- XMPP server domain -->
<domain name="$${rayo_domain_name}" shared-secret="ClueCon">
<!-- use this instead if you want secure XMPP client to server connections. Put .crt and .key file in freeswitch/certs -->
<!--domain name="$${rayo_domain_name}" shared-secret="ClueCon" cert="$${base_dir}/certs/$${rayo_domain_name}.crt" key="$${base_dir}/certs/$${rayo_domain_name}.key"-->
<!-- Listeners for new Rayo client connections -->
<!--listen type="c2s" port="5222" address="$${local_ip_v4}" acl="rayo-clients"/-->

4
src/mod/event_handlers/mod_rayo/conf/autoload_configs/rayo.conf.xml
View File

@ -11,8 +11,10 @@
<param name="record-file-prefix" value="$${recordings_dir}/"/>
</record>
<!-- domain to use in from attribute of client messages -->
<!-- XMPP server domain -->
<domain name="$${rayo_domain_name}" shared-secret="ClueCon">
<!-- use this instead if you want secure XMPP client to server connections. Put .crt and .key file in freeswitch/certs -->
<!--domain name="$${rayo_domain_name}" shared-secret="ClueCon" cert="$${base_dir}/certs/$${rayo_domain_name}.crt" key="$${base_dir}/certs/$${rayo_domain_name}.key"-->
<!-- Listeners for new Rayo client connections -->
<!--listen type="c2s" port="5222" address="$${local_ip_v4}" acl="rayo-clients"/-->

3
src/mod/event_handlers/mod_rayo/iks_helpers.h
View File

@ -39,8 +39,7 @@
#define IKS_NS_XMPP_STANZAS "urn:ietf:params:xml:ns:xmpp-stanzas"
#define IKS_NS_XMPP_STREAMS "http://etherx.jabber.org/streams"
#define IKS_NS_XMPP_DIALBACK "jabber:server:dialback"
#define IKS_NS_BIDI_FEATURE "urn:xmpp:features:bidi"
#define IKS_NS_BIDI "urn:xmpp:bidi"
#define IKS_NS_XMPP_TLS "urn:ietf:params:xml:ns:xmpp-tls"
struct xmpp_error {
const char *name;

26
src/mod/event_handlers/mod_rayo/mod_rayo.c
View File

@ -3079,6 +3079,8 @@ static switch_status_t do_config(switch_memory_pool_t *pool, const char *config_
switch_xml_t l;
const char *shared_secret = switch_xml_attr_soft(domain, "shared-secret");
const char *name = switch_xml_attr_soft(domain, "name");
const char *cert = switch_xml_attr_soft(domain, "cert");
const char *key = switch_xml_attr_soft(domain, "key");
if (zstr(name)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Missing <domain name=\"... failed to configure rayo server\n");
status = SWITCH_STATUS_FALSE;
@ -3093,6 +3095,14 @@ static switch_status_t do_config(switch_memory_pool_t *pool, const char *config_
globals.xmpp_context = xmpp_stream_context_create(name, shared_secret, on_xmpp_stream_ready, on_xmpp_stream_recv, on_xmpp_stream_destroy);
globals.server = rayo_server_create(name);
/* set up TLS */
if (!zstr(cert)) {
xmpp_stream_context_add_cert(globals.xmpp_context, cert);
}
if (!zstr(key)) {
xmpp_stream_context_add_key(globals.xmpp_context, key);
}
/* configure authorized users for this domain */
l = switch_xml_child(domain, "users");
if (l) {
@ -3719,14 +3729,14 @@ SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_rayo_shutdown)
switch_event_unbind_callback(on_call_end_event);
switch_event_unbind_callback(route_mixer_event);
switch_core_hash_destroy(&globals.command_handlers);
switch_core_hash_destroy(&globals.event_handlers);
switch_core_hash_destroy(&globals.clients_roster);
switch_core_hash_destroy(&globals.actors);
switch_core_hash_destroy(&globals.destroy_actors);
switch_core_hash_destroy(&globals.actors_by_id);
switch_core_hash_destroy(&globals.dial_gateways);
switch_core_hash_destroy(&globals.cmd_aliases);
switch_core_hash_destroy(&globals.command_handlers);
switch_core_hash_destroy(&globals.event_handlers);
switch_core_hash_destroy(&globals.clients_roster);
switch_core_hash_destroy(&globals.actors);
switch_core_hash_destroy(&globals.destroy_actors);
switch_core_hash_destroy(&globals.actors_by_id);
switch_core_hash_destroy(&globals.dial_gateways);
switch_core_hash_destroy(&globals.cmd_aliases);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Module shutdown\n");

129
src/mod/event_handlers/mod_rayo/xmpp_streams.c
View File

@ -29,6 +29,8 @@
#include <switch.h>
#include <iksemel.h>
#include <openssl/ssl.h>
#include "xmpp_streams.h"
#include "iks_helpers.h"
#include "sasl.h"
@ -63,6 +65,10 @@ struct xmpp_stream_context {
int shutdown;
/** prevents context shutdown until all threads are finished */
switch_thread_rwlock_t *shutdown_rwlock;
/** path to cert PEM file */
const char *cert_pem_file;
/** path to key PEM file */
const char *key_pem_file;
};
/**
@ -71,8 +77,8 @@ struct xmpp_stream_context {
enum xmpp_stream_state {
/** new connection */
XSS_CONNECT,
/** bidirectional comms established */
XSS_BIDI,
/** encrypted comms established */
XSS_SECURE,
/** remote party authenticated */
XSS_AUTHENTICATED,
/** client resource bound */
@ -159,7 +165,7 @@ static const char *xmpp_stream_state_to_string(enum xmpp_stream_state state)
{
switch(state) {
case XSS_CONNECT: return "CONNECT";
case XSS_BIDI: return "BIDI";
case XSS_SECURE: return "SECURE";
case XSS_AUTHENTICATED: return "AUTHENTICATED";
case XSS_RESOURCE_BOUND: return "RESOURCE_BOUND";
case XSS_READY: return "READY";
@ -358,6 +364,31 @@ static void xmpp_send_client_header_auth(struct xmpp_stream *stream)
free(header);
}
/**
* Send sasl + starttls reply to xmpp <stream>
* @param stream the xmpp stream
*/
static void xmpp_send_client_header_tls(struct xmpp_stream *stream)
{
if (stream->context->key_pem_file && stream->context->cert_pem_file) {
struct xmpp_stream_context *context = stream->context;
char *header = switch_mprintf(
"<stream:stream xmlns='"IKS_NS_CLIENT"' xmlns:db='"IKS_NS_XMPP_DIALBACK"'"
" from='%s' id='%s' xml:lang='en' version='1.0'"
" xmlns:stream='"IKS_NS_XMPP_STREAMS"'><stream:features>"
"<starttls xmlns='"IKS_NS_XMPP_TLS"'><required/></starttls>"
"<mechanisms xmlns='"IKS_NS_XMPP_SASL"'>"
"<mechanism>PLAIN</mechanism>"
"</mechanisms></stream:features>", context->domain, stream->id);
iks_send_raw(stream->parser, header);
free(header);
} else {
/* not set up for TLS, skip it */
stream->state = XSS_SECURE;
xmpp_send_client_header_auth(stream);
}
}
/**
* Send sasl reply to xmpp <stream>
* @param stream the xmpp stream
@ -370,12 +401,6 @@ static void xmpp_send_server_header_auth(struct xmpp_stream *stream)
" from='%s' id='%s' xml:lang='en' version='1.0'"
" xmlns:stream='"IKS_NS_XMPP_STREAMS"'>"
"<stream:features>"
#if 0
"<bidi xmlns='"IKS_NS_BIDI_FEATURE"'/>"
"<mechanisms xmlns='"IKS_NS_XMPP_SASL"'>"
"<mechanism>PLAIN</mechanism>"
"</mechanisms>"
#endif
"</stream:features>",
context->domain, stream->id);
iks_send_raw(stream->parser, header);
@ -417,6 +442,21 @@ static void xmpp_send_outbound_server_header(struct xmpp_stream *stream)
free(header);
}
/**
* Handle <starttls> message.
* @param the xmpp stream
* @param node the <starttls> packet
*/
static void on_stream_starttls(struct xmpp_stream *stream, iks *node)
{
/* wait for handshake to start */
if (iks_proceed_tls(stream->parser, stream->context->cert_pem_file, stream->context->key_pem_file, 1) == IKS_OK) {
stream->state = XSS_SECURE;
} else {
stream->state = XSS_ERROR;
}
}
/**
* Handle <auth> message. Only PLAIN supported.
* @param stream the xmpp stream
@ -431,7 +471,7 @@ static void on_stream_auth(struct xmpp_stream *stream, iks *node)
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(stream->id), SWITCH_LOG_DEBUG, "%s, auth, state = %s\n", stream->jid, xmpp_stream_state_to_string(stream->state));
/* wrong state for authentication */
if (stream->state != XSS_BIDI) {
if (stream->state != XSS_SECURE) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(stream->id), SWITCH_LOG_WARNING, "%s, auth UNEXPECTED, state = %s\n", stream->jid, xmpp_stream_state_to_string(stream->state));
/* on_auth unexpected error */
stream->state = XSS_ERROR;
@ -486,38 +526,6 @@ static void on_stream_auth(struct xmpp_stream *stream, iks *node)
}
}
/**
* Handle <bidi> message.
* @param stream the xmpp stream
* @param node the <bidi> packet
*/
static void on_stream_bidi(struct xmpp_stream *stream, iks *node)
{
/* only allow bidi on s2s connections before auth */
if (stream->s2s) {
switch(stream->state) {
case XSS_CONNECT:
stream->state = XSS_BIDI;
break;
case XSS_BIDI:
case XSS_AUTHENTICATED:
case XSS_RESOURCE_BOUND:
case XSS_READY:
case XSS_SHUTDOWN:
case XSS_ERROR:
case XSS_DESTROY:
/* error */
stream->state = XSS_ERROR;
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(stream->id), SWITCH_LOG_INFO, "%s, bad state: %s\n", stream->jid, xmpp_stream_state_to_string(stream->state));
break;
}
} else {
/* error */
stream->state = XSS_ERROR;
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(stream->id), SWITCH_LOG_INFO, "%s, bidi not allowed from client\n", stream->jid);
}
}
/**
* Handle <iq><session> request
* @param stream the xmpp stream
@ -606,7 +614,7 @@ static void on_stream_iq(struct xmpp_stream *stream, iks *iq)
struct xmpp_stream_context *context = stream->context;
switch(stream->state) {
case XSS_CONNECT:
case XSS_BIDI: {
case XSS_SECURE: {
iks *error = iks_new_error(iq, STANZA_ERROR_NOT_AUTHORIZED);
xmpp_stream_stanza_send(stream, error);
break;
@ -689,7 +697,9 @@ static void on_client_stream_start(struct xmpp_stream *stream, iks *node)
switch (stream->state) {
case XSS_CONNECT:
case XSS_BIDI:
xmpp_send_client_header_tls(stream);
break;
case XSS_SECURE:
xmpp_send_client_header_auth(stream);
break;
case XSS_AUTHENTICATED:
@ -960,7 +970,7 @@ static void on_outbound_server_stream_start(struct xmpp_stream *stream, iks *nod
/* strange... I expect IKS_NODE_STOP, this is a workaround. */
stream->state = XSS_DESTROY;
break;
case XSS_BIDI:
case XSS_SECURE:
case XSS_AUTHENTICATED:
case XSS_RESOURCE_BOUND:
case XSS_READY:
@ -1001,7 +1011,7 @@ static void on_inbound_server_stream_start(struct xmpp_stream *stream, iks *node
case XSS_CONNECT:
xmpp_send_server_header_auth(stream);
break;
case XSS_BIDI:
case XSS_SECURE:
break;
case XSS_AUTHENTICATED: {
/* all set */
@ -1075,8 +1085,8 @@ static int on_stream(void *user_data, int type, iks *node)
on_stream_presence(stream, node);
} else if (!strcmp("auth", name)) {
on_stream_auth(stream, node);
} else if (!strcmp("bidi", name)) {
on_stream_bidi(stream, node);
} else if (!strcmp("starttls", name)) {
on_stream_starttls(stream, node);
} else if (!strcmp("db:result", name)) {
on_stream_dialback_result(stream, node);
} else if (!strcmp("db:verify", name)) {
@ -1194,6 +1204,7 @@ static void *SWITCH_THREAD_FUNC xmpp_stream_thread(switch_thread_t *thread, void
case IKS_OK:
err_count = 0;
break;
case IKS_NET_TLSFAIL:
case IKS_NET_RWERR:
case IKS_NET_NOCONN:
case IKS_NET_NOSOCK:
@ -1291,11 +1302,6 @@ static struct xmpp_stream *xmpp_stream_init(struct xmpp_stream_context *context,
stream->incoming = incoming;
switch_queue_create(&stream->msg_queue, MAX_QUEUE_LEN, pool);
if (!stream->s2s) {
/* client is already bi-directional */
stream->state = XSS_BIDI;
}
/* set up XMPP stream parser */
stream->parser = iks_stream_new(stream->s2s ? IKS_NS_SERVER : IKS_NS_CLIENT, stream, on_stream);
@ -1829,6 +1835,23 @@ void *xmpp_stream_get_private(struct xmpp_stream *stream)
return stream->user_private;
}
/**
* Add PEM cert file to stream for new SSL connections
*/
void xmpp_stream_context_add_cert(struct xmpp_stream_context *context, const char *cert_pem_file)
{
context->cert_pem_file = switch_core_strdup(context->pool, cert_pem_file);
}
/**
* Add PEM key file to stream for new SSL connections
*/
void xmpp_stream_context_add_key(struct xmpp_stream_context *context, const char *key_pem_file)
{
context->key_pem_file = switch_core_strdup(context->pool, key_pem_file);
}
/* For Emacs:
* Local Variables:
* mode:c

2
src/mod/event_handlers/mod_rayo/xmpp_streams.h
View File

@ -37,6 +37,8 @@ typedef void (* xmpp_stream_recv_callback)(struct xmpp_stream *stream, iks *stan
typedef void (* xmpp_stream_destroy_callback)(struct xmpp_stream *stream);
extern struct xmpp_stream_context *xmpp_stream_context_create(const char *domain, const char *domain_secret, xmpp_stream_ready_callback ready, xmpp_stream_recv_callback recv, xmpp_stream_destroy_callback destroy);
extern void xmpp_stream_context_add_cert(struct xmpp_stream_context *context, const char *cert_pem_file);
extern void xmpp_stream_context_add_key(struct xmpp_stream_context *context, const char *key_pem_file);
extern void xmpp_stream_context_add_user(struct xmpp_stream_context *context, const char *user, const char *password);
extern void xmpp_stream_context_dump(struct xmpp_stream_context *context, switch_stream_handle_t *stream);
extern void xmpp_stream_context_destroy(struct xmpp_stream_context *context);