359 lines
12 KiB
C
359 lines
12 KiB
C
|
/*
|
||
|
|
* Asterisk -- An open source telephony toolkit.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012, Digium, Inc.
|
||
|
|
*
|
||
|
|
* Michael L. Young <elgueromexicano@gmail.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 SIP channel
|
||
|
|
*
|
||
|
|
* \author Michael L. Young <elgueromexicano@gmail.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*** MODULEINFO
|
||
|
|
<support_level>deprecated</support_level>
|
||
|
|
***/
|
||
|
|
|
||
|
|
#include "asterisk.h"
|
||
|
|
|
||
|
|
#include "include/sip.h"
|
||
|
|
#include "include/security_events.h"
|
||
|
|
|
||
|
|
/*! \brief Determine transport type used to receive request*/
|
||
|
|
|
||
|
|
static enum ast_transport security_event_get_transport(const struct sip_pvt *p)
|
||
|
|
{
|
||
|
|
return p->socket.type;
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_invalid_peer(const struct sip_pvt *p)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
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 = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&inval_acct_id));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_failed_acl(const struct sip_pvt *p, const char *aclname)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
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 = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
.acl_name = aclname,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&failed_acl_event));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_inval_password(const struct sip_pvt *p, const char *response_challenge, const char *response_hash)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
struct ast_security_event_inval_password inval_password = {
|
||
|
|
.common.event_type = AST_SECURITY_EVENT_INVAL_PASSWORD,
|
||
|
|
.common.version = AST_SECURITY_EVENT_INVAL_PASSWORD_VERSION,
|
||
|
|
.common.service = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
|
||
|
|
.challenge = p->nonce,
|
||
|
|
.received_challenge = response_challenge,
|
||
|
|
.received_hash = response_hash,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&inval_password));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_auth_success(const struct sip_pvt *p, uint32_t using_password)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
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 = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
.using_password = using_password,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&successful_auth));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_session_limit(const struct sip_pvt *p)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
struct ast_security_event_session_limit session_limit = {
|
||
|
|
.common.event_type = AST_SECURITY_EVENT_SESSION_LIMIT,
|
||
|
|
.common.version = AST_SECURITY_EVENT_SESSION_LIMIT_VERSION,
|
||
|
|
.common.service = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&session_limit));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_failed_challenge_response(const struct sip_pvt *p, const char *response, const char *expected_response)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
char account_id[256];
|
||
|
|
|
||
|
|
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 = "SIP",
|
||
|
|
.common.account_id = account_id,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
|
||
|
|
.challenge = p->nonce,
|
||
|
|
.response = response,
|
||
|
|
.expected_response = expected_response,
|
||
|
|
};
|
||
|
|
|
||
|
|
if (!ast_strlen_zero(p->from)) { /* When dialing, show account making call */
|
||
|
|
ast_copy_string(account_id, p->from, sizeof(account_id));
|
||
|
|
} else {
|
||
|
|
ast_copy_string(account_id, p->exten, sizeof(account_id));
|
||
|
|
}
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&chal_resp_failed));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_chal_sent(const struct sip_pvt *p)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
char account_id[256];
|
||
|
|
|
||
|
|
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 = "SIP",
|
||
|
|
.common.account_id = account_id,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
|
||
|
|
.challenge = p->nonce,
|
||
|
|
};
|
||
|
|
|
||
|
|
if (!ast_strlen_zero(p->from)) { /* When dialing, show account making call */
|
||
|
|
ast_copy_string(account_id, p->from, sizeof(account_id));
|
||
|
|
} else {
|
||
|
|
ast_copy_string(account_id, p->exten, sizeof(account_id));
|
||
|
|
}
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&chal_sent));
|
||
|
|
}
|
||
|
|
|
||
|
|
void sip_report_inval_transport(const struct sip_pvt *p, const char *transport)
|
||
|
|
{
|
||
|
|
char session_id[32];
|
||
|
|
|
||
|
|
struct ast_security_event_inval_transport inval_transport = {
|
||
|
|
.common.event_type = AST_SECURITY_EVENT_INVAL_TRANSPORT,
|
||
|
|
.common.version = AST_SECURITY_EVENT_INVAL_TRANSPORT_VERSION,
|
||
|
|
.common.service = "SIP",
|
||
|
|
.common.account_id = p->exten,
|
||
|
|
.common.local_addr = {
|
||
|
|
.addr = &p->ourip,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.remote_addr = {
|
||
|
|
.addr = &p->sa,
|
||
|
|
.transport = security_event_get_transport(p)
|
||
|
|
},
|
||
|
|
.common.session_id = session_id,
|
||
|
|
|
||
|
|
.transport = transport,
|
||
|
|
};
|
||
|
|
|
||
|
|
snprintf(session_id, sizeof(session_id), "%p", p);
|
||
|
|
|
||
|
|
ast_security_event_report(AST_SEC_EVT(&inval_transport));
|
||
|
|
}
|
||
|
|
|
||
|
|
int sip_report_security_event(const char *peer, struct ast_sockaddr *addr, const struct sip_pvt *p,
|
||
|
|
const struct sip_request *req, const int res)
|
||
|
|
{
|
||
|
|
|
||
|
|
struct sip_peer *peer_report;
|
||
|
|
enum check_auth_result res_report = res;
|
||
|
|
struct ast_str *buf;
|
||
|
|
char *c;
|
||
|
|
const char *authtoken;
|
||
|
|
char *reqheader, *respheader;
|
||
|
|
int result = 0;
|
||
|
|
char aclname[256];
|
||
|
|
struct digestkeys keys[] = {
|
||
|
|
[K_RESP] = { "response=", "" },
|
||
|
|
[K_URI] = { "uri=", "" },
|
||
|
|
[K_USER] = { "username=", "" },
|
||
|
|
[K_NONCE] = { "nonce=", "" },
|
||
|
|
[K_LAST] = { NULL, NULL}
|
||
|
|
};
|
||
|
|
|
||
|
|
peer_report = sip_find_peer(peer, addr, TRUE, FINDPEERS, FALSE, p->socket.type);
|
||
|
|
|
||
|
|
switch(res_report) {
|
||
|
|
case AUTH_DONT_KNOW:
|
||
|
|
break;
|
||
|
|
case AUTH_SUCCESSFUL:
|
||
|
|
if (peer_report) {
|
||
|
|
if (ast_strlen_zero(peer_report->secret) && ast_strlen_zero(peer_report->md5secret)) {
|
||
|
|
sip_report_auth_success(p, 0);
|
||
|
|
} else {
|
||
|
|
sip_report_auth_success(p, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case AUTH_CHALLENGE_SENT:
|
||
|
|
sip_report_chal_sent(p);
|
||
|
|
break;
|
||
|
|
case AUTH_SECRET_FAILED:
|
||
|
|
case AUTH_USERNAME_MISMATCH:
|
||
|
|
sip_auth_headers(WWW_AUTH, &respheader, &reqheader);
|
||
|
|
authtoken = sip_get_header(req, reqheader);
|
||
|
|
buf = ast_str_thread_get(&check_auth_buf, CHECK_AUTH_BUF_INITLEN);
|
||
|
|
ast_str_set(&buf, 0, "%s", authtoken);
|
||
|
|
c = ast_str_buffer(buf);
|
||
|
|
|
||
|
|
sip_digest_parser(c, keys);
|
||
|
|
|
||
|
|
if (res_report == AUTH_SECRET_FAILED) {
|
||
|
|
sip_report_inval_password(p, keys[K_NONCE].s, keys[K_RESP].s);
|
||
|
|
} else {
|
||
|
|
if (peer_report) {
|
||
|
|
sip_report_failed_challenge_response(p, keys[K_USER].s, peer_report->username);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case AUTH_NOT_FOUND:
|
||
|
|
/* with sip_cfg.alwaysauthreject on, generates 2 events */
|
||
|
|
sip_report_invalid_peer(p);
|
||
|
|
break;
|
||
|
|
case AUTH_UNKNOWN_DOMAIN:
|
||
|
|
snprintf(aclname, sizeof(aclname), "domain_must_match");
|
||
|
|
sip_report_failed_acl(p, aclname);
|
||
|
|
break;
|
||
|
|
case AUTH_PEER_NOT_DYNAMIC:
|
||
|
|
snprintf(aclname, sizeof(aclname), "peer_not_dynamic");
|
||
|
|
sip_report_failed_acl(p, aclname);
|
||
|
|
break;
|
||
|
|
case AUTH_ACL_FAILED:
|
||
|
|
/* with sip_cfg.alwaysauthreject on, generates 2 events */
|
||
|
|
snprintf(aclname, sizeof(aclname), "device_must_match_acl");
|
||
|
|
sip_report_failed_acl(p, aclname);
|
||
|
|
break;
|
||
|
|
case AUTH_BAD_TRANSPORT:
|
||
|
|
sip_report_inval_transport(p, sip_get_transport(req->socket.type));
|
||
|
|
break;
|
||
|
|
case AUTH_RTP_FAILED:
|
||
|
|
break;
|
||
|
|
case AUTH_SESSION_LIMIT:
|
||
|
|
sip_report_session_limit(p);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (peer_report) {
|
||
|
|
sip_unref_peer(peer_report, "sip_report_security_event: sip_unref_peer: from handle_incoming");
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|