1 files changed, 234 insertions, 0 deletions

diff --git a/res/res_pjsip/security_events.c b/res/res_pjsip/security_events.c
new file mode 100644
index 000000000..7b4913753
--- /dev/null
+++ b/res/res_pjsip/security_events.c
@@ -0,0 +1,234 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * Joshua Colp <jcolp@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file
+ *
+ * \brief Generate security events in the PJSIP channel
+ *
+ * \author Joshua Colp <jcolp@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <pjsip.h>
+
+#include "asterisk/res_pjsip.h"
+#include "asterisk/security_events.h"
+
+static int find_transport_in_use(void *obj, void *arg, int flags)
+{
+	struct ast_sip_transport *transport = obj;
+	pjsip_rx_data *rdata = arg;
+
+	if ((transport->state->transport == rdata->tp_info.transport) ||
+		(transport->state->factory && !pj_strcmp(&transport->state->factory->addr_name.host, &rdata->tp_info.transport->local_name.host) &&
+			transport->state->factory->addr_name.port == rdata->tp_info.transport->local_name.port)) {
+		return CMP_MATCH | CMP_STOP;
+	}
+
+	return 0;
+}
+
+static enum ast_transport security_event_get_transport(pjsip_rx_data *rdata)
+{
+	RAII_VAR(struct ao2_container *, transports, NULL, ao2_cleanup);
+	RAII_VAR(struct ast_sip_transport *, transport, NULL, ao2_cleanup);
+
+	/* It should be impossible for these to fail as the transport has to exist for the message to exist */
+	transports = ast_sorcery_retrieve_by_fields(ast_sip_get_sorcery(), "transport", AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);
+
+	ast_assert(transports != NULL);
+
+	transport = ao2_callback(transports, 0, find_transport_in_use, rdata);
+
+	ast_assert(transport != NULL);
+
+	return transport->type;
+}
+
+static void security_event_populate(pjsip_rx_data *rdata, char *call_id, size_t call_id_size, struct ast_sockaddr *local, struct ast_sockaddr *remote)
+{
+	char host[NI_MAXHOST];
+
+	ast_copy_pj_str(call_id, &rdata->msg_info.cid->id, call_id_size);
+
+	ast_copy_pj_str(host, &rdata->tp_info.transport->local_name.host, sizeof(host));
+	ast_sockaddr_parse(local, host, PARSE_PORT_FORBID);
+	ast_sockaddr_set_port(local, rdata->tp_info.transport->local_name.port);
+
+	ast_sockaddr_parse(remote, rdata->pkt_info.src_name, PARSE_PORT_FORBID);
+	ast_sockaddr_set_port(remote, rdata->pkt_info.src_port);
+}
+
+void ast_sip_report_invalid_endpoint(const char *name, pjsip_rx_data *rdata)
+{
+	enum ast_transport transport = security_event_get_transport(rdata);
+	char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
+	struct ast_sockaddr local, remote;
+
+	struct ast_security_event_inval_acct_id inval_acct_id = {
+		.common.event_type = AST_SECURITY_EVENT_INVAL_ACCT_ID,
+		.common.version    = AST_SECURITY_EVENT_INVAL_ACCT_ID_VERSION,
+		.common.service    = "PJSIP",
+		.common.account_id = name,
+		.common.local_addr = {
+			.addr      = &local,
+			.transport = transport,
+		},
+		.common.remote_addr = {
+			.addr       = &remote,
+			.transport = transport,
+		},
+		.common.session_id = call_id,
+	};
+
+	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
+
+	ast_security_event_report(AST_SEC_EVT(&inval_acct_id));
+}
+
+void ast_sip_report_failed_acl(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata, const char *name)
+{
+	enum ast_transport transport = security_event_get_transport(rdata);
+	char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
+	struct ast_sockaddr local, remote;
+
+	struct ast_security_event_failed_acl failed_acl_event = {
+			.common.event_type  = AST_SECURITY_EVENT_FAILED_ACL,
+			.common.version     = AST_SECURITY_EVENT_FAILED_ACL_VERSION,
+			.common.service     = "PJSIP",
+			.common.account_id  = ast_sorcery_object_get_id(endpoint),
+			.common.local_addr  = {
+					.addr       = &local,
+					.transport  = transport,
+			},
+			.common.remote_addr = {
+					.addr       = &remote,
+					.transport  = transport,
+			},
+			.common.session_id  = call_id,
+			.acl_name           = name,
+	};
+
+	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
+
+	ast_security_event_report(AST_SEC_EVT(&failed_acl_event));
+}
+
+void ast_sip_report_auth_failed_challenge_response(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata)
+{
+	pjsip_authorization_hdr *auth = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_AUTHORIZATION, NULL);
+	enum ast_transport transport = security_event_get_transport(rdata);
+	char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
+	char nonce[64] = "", response[256] = "";
+	struct ast_sockaddr local, remote;
+
+	struct ast_security_event_chal_resp_failed chal_resp_failed = {
+				.common.event_type = AST_SECURITY_EVENT_CHAL_RESP_FAILED,
+				.common.version    = AST_SECURITY_EVENT_CHAL_RESP_FAILED_VERSION,
+				.common.service    = "PJSIP",
+				.common.account_id = ast_sorcery_object_get_id(endpoint),
+				.common.local_addr = {
+						.addr      = &local,
+						.transport = transport,
+				},
+				.common.remote_addr = {
+						.addr      = &remote,
+						.transport = transport,
+				},
+				.common.session_id = call_id,
+
+				.challenge         = nonce,
+				.response          = response,
+				.expected_response = "",
+		};
+
+	if (auth && !pj_strcmp2(&auth->scheme, "digest")) {
+		ast_copy_pj_str(nonce, &auth->credential.digest.nonce, sizeof(nonce));
+		ast_copy_pj_str(response, &auth->credential.digest.response, sizeof(response));
+	}
+
+	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
+
+	ast_security_event_report(AST_SEC_EVT(&chal_resp_failed));
+}
+
+void ast_sip_report_auth_success(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata)
+{
+	pjsip_authorization_hdr *auth = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_AUTHORIZATION, NULL);
+	enum ast_transport transport = security_event_get_transport(rdata);
+	char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
+	struct ast_sockaddr local, remote;
+
+	struct ast_security_event_successful_auth successful_auth = {
+			.common.event_type  = AST_SECURITY_EVENT_SUCCESSFUL_AUTH,
+			.common.version     = AST_SECURITY_EVENT_SUCCESSFUL_AUTH_VERSION,
+			.common.service     = "PJSIP",
+			.common.account_id  = ast_sorcery_object_get_id(endpoint),
+			.common.local_addr  = {
+					.addr       = &local,
+					.transport  = transport,
+			},
+			.common.remote_addr = {
+					.addr       = &remote,
+					.transport  = transport,
+			},
+			.common.session_id  = call_id,
+			.using_password     = auth ? (uint32_t *)1 : (uint32_t *)0,
+	};
+
+	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
+
+	ast_security_event_report(AST_SEC_EVT(&successful_auth));
+}
+
+void ast_sip_report_auth_challenge_sent(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata, pjsip_tx_data *tdata)
+{
+	pjsip_www_authenticate_hdr *auth = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_WWW_AUTHENTICATE, NULL);
+	enum ast_transport transport = security_event_get_transport(rdata);
+	char nonce[64] = "", call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
+	struct ast_sockaddr local, remote;
+
+	struct ast_security_event_chal_sent chal_sent = {
+			.common.event_type = AST_SECURITY_EVENT_CHAL_SENT,
+			.common.version    = AST_SECURITY_EVENT_CHAL_SENT_VERSION,
+			.common.service    = "PJSIP",
+			.common.account_id = ast_sorcery_object_get_id(endpoint),
+			.common.local_addr = {
+					.addr      = &local,
+					.transport = transport,
+			},
+			.common.remote_addr = {
+					.addr      = &remote,
+					.transport = transport,
+			},
+			.common.session_id = call_id,
+			.challenge         = nonce,
+	};
+
+	if (auth && !pj_strcmp2(&auth->scheme, "digest")) {
+		ast_copy_pj_str(nonce, &auth->challenge.digest.nonce, sizeof(nonce));
+	}
+
+	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
+
+	ast_security_event_report(AST_SEC_EVT(&chal_sent));
+}