285 lines
9.3 KiB
C
285 lines
9.3 KiB
C
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Joshua Colp <jcolp@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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*
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* \brief Generate security events in the PJSIP channel
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*
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* \author Joshua Colp <jcolp@digium.com>
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*/
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#include "asterisk.h"
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#include <pjsip.h>
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#include "asterisk/res_pjsip.h"
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#include "asterisk/security_events.h"
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static enum ast_transport security_event_get_transport(pjsip_rx_data *rdata)
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{
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if (rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_UDP ||
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rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_UDP6) {
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return AST_TRANSPORT_UDP;
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} else if (rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_TCP ||
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rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_TCP6) {
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return AST_TRANSPORT_TCP;
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} else if (rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_TLS ||
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rdata->tp_info.transport->key.type == PJSIP_TRANSPORT_TLS6) {
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return AST_TRANSPORT_TLS;
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} else if (!strcasecmp(rdata->tp_info.transport->type_name, "WS")) {
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return AST_TRANSPORT_WS;
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} else if (!strcasecmp(rdata->tp_info.transport->type_name, "WSS")) {
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return AST_TRANSPORT_WSS;
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} else {
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return 0;
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}
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}
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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)
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{
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char host[NI_MAXHOST];
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ast_copy_pj_str(call_id, &rdata->msg_info.cid->id, call_id_size);
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ast_copy_pj_str(host, &rdata->tp_info.transport->local_name.host, sizeof(host));
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ast_sockaddr_parse(local, host, PARSE_PORT_FORBID);
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ast_sockaddr_set_port(local, rdata->tp_info.transport->local_name.port);
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ast_sockaddr_parse(remote, rdata->pkt_info.src_name, PARSE_PORT_FORBID);
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ast_sockaddr_set_port(remote, rdata->pkt_info.src_port);
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}
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static const char *get_account_id(struct ast_sip_endpoint *endpoint)
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{
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RAII_VAR(struct ast_sip_endpoint *, artificial, ast_sip_get_artificial_endpoint(), ao2_cleanup);
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return endpoint == artificial ? "<unknown>" : ast_sorcery_object_get_id(endpoint);
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}
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void ast_sip_report_invalid_endpoint(const char *name, pjsip_rx_data *rdata)
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{
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_inval_acct_id inval_acct_id = {
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.common.event_type = AST_SECURITY_EVENT_INVAL_ACCT_ID,
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.common.version = AST_SECURITY_EVENT_INVAL_ACCT_ID_VERSION,
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.common.service = "PJSIP",
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.common.account_id = name,
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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};
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&inval_acct_id));
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}
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void ast_sip_report_failed_acl(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata, const char *name)
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{
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_failed_acl failed_acl_event = {
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.common.event_type = AST_SECURITY_EVENT_FAILED_ACL,
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.common.version = AST_SECURITY_EVENT_FAILED_ACL_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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.acl_name = name,
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};
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&failed_acl_event));
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}
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void ast_sip_report_auth_failed_challenge_response(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata)
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{
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pjsip_authorization_hdr *auth = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_AUTHORIZATION, NULL);
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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char nonce[64] = "", response[256] = "";
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struct ast_sockaddr local, remote;
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struct ast_security_event_chal_resp_failed chal_resp_failed = {
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.common.event_type = AST_SECURITY_EVENT_CHAL_RESP_FAILED,
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.common.version = AST_SECURITY_EVENT_CHAL_RESP_FAILED_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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.challenge = nonce,
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.response = response,
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.expected_response = "",
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};
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if (auth && !pj_strcmp2(&auth->scheme, "Digest")) {
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ast_copy_pj_str(nonce, &auth->credential.digest.nonce, sizeof(nonce));
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ast_copy_pj_str(response, &auth->credential.digest.response, sizeof(response));
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}
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&chal_resp_failed));
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}
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void ast_sip_report_auth_success(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata)
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{
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pjsip_authorization_hdr *auth = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_AUTHORIZATION, NULL);
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_successful_auth successful_auth = {
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.common.event_type = AST_SECURITY_EVENT_SUCCESSFUL_AUTH,
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.common.version = AST_SECURITY_EVENT_SUCCESSFUL_AUTH_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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.using_password = auth ? 1 : 0,
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};
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&successful_auth));
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}
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void ast_sip_report_auth_challenge_sent(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata, pjsip_tx_data *tdata)
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{
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pjsip_www_authenticate_hdr *auth = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_WWW_AUTHENTICATE, NULL);
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enum ast_transport transport = security_event_get_transport(rdata);
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char nonce[64] = "", call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_chal_sent chal_sent = {
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.common.event_type = AST_SECURITY_EVENT_CHAL_SENT,
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.common.version = AST_SECURITY_EVENT_CHAL_SENT_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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.challenge = nonce,
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};
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if (auth && !pj_strcmp2(&auth->scheme, "digest")) {
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ast_copy_pj_str(nonce, &auth->challenge.digest.nonce, sizeof(nonce));
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}
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&chal_sent));
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}
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void ast_sip_report_req_no_support(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata,
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const char* req_type)
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{
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_req_no_support req_no_support_event = {
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.common.event_type = AST_SECURITY_EVENT_REQ_NO_SUPPORT,
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.common.version = AST_SECURITY_EVENT_REQ_NO_SUPPORT_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id,
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.request_type = req_type
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};
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&req_no_support_event));
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}
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void ast_sip_report_mem_limit(struct ast_sip_endpoint *endpoint, pjsip_rx_data *rdata)
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{
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enum ast_transport transport = security_event_get_transport(rdata);
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char call_id[pj_strlen(&rdata->msg_info.cid->id) + 1];
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struct ast_sockaddr local, remote;
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struct ast_security_event_mem_limit mem_limit_event = {
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.common.event_type = AST_SECURITY_EVENT_MEM_LIMIT,
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.common.version = AST_SECURITY_EVENT_MEM_LIMIT_VERSION,
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.common.service = "PJSIP",
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.common.account_id = get_account_id(endpoint),
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.common.local_addr = {
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.addr = &local,
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.transport = transport,
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},
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.common.remote_addr = {
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.addr = &remote,
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.transport = transport,
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},
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.common.session_id = call_id
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};
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security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);
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ast_security_event_report(AST_SEC_EVT(&mem_limit_event));
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}
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