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abf40d9b28
The current Security Events Framework API only supports IPv4 when it comes to generating security events. This patch does the following: * Changes the Security Events Framework API to support IPV6 and updates the components that use this API. * Eliminates an error message that was being generated since the current implementation was treating an IPv6 socket address as if it was IPv4. * Some copyright dates were updated on files touched by this patch. (closes issue ASTERISK-19447) Reported by: Michael L. Young Tested by: Michael L. Young Patches: security_events_ipv6v3.diff uploaded by Michael L. Young (license 5026) Review: https://reviewboard.asterisk.org/r/1777/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@362200 65c4cc65-6c06-0410-ace0-fbb531ad65f3
370 lines
12 KiB
C
370 lines
12 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2012, Digium, Inc.
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*
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* Michael L. Young <elgueromexicano@gmail.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 SIP channel
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*
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* \author Michael L. Young <elgueromexicano@gmail.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "include/sip.h"
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#include "include/security_events.h"
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/*! \brief Determine transport type used to receive request*/
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static enum ast_security_event_transport_type security_event_get_transport(const struct sip_pvt *p)
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{
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int res = 0;
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switch (p->socket.type) {
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case SIP_TRANSPORT_UDP:
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return AST_SECURITY_EVENT_TRANSPORT_UDP;
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case SIP_TRANSPORT_TCP:
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return AST_SECURITY_EVENT_TRANSPORT_TCP;
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case SIP_TRANSPORT_TLS:
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return AST_SECURITY_EVENT_TRANSPORT_TLS;
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}
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return res;
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}
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void sip_report_invalid_peer(const struct sip_pvt *p)
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{
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char session_id[32];
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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 = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&inval_acct_id));
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}
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void sip_report_failed_acl(const struct sip_pvt *p, const char *aclname)
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{
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char session_id[32];
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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 = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.acl_name = aclname,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&failed_acl_event));
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}
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void sip_report_inval_password(const struct sip_pvt *p, const char *response_challenge, const char *response_hash)
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{
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char session_id[32];
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struct ast_security_event_inval_password inval_password = {
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.common.event_type = AST_SECURITY_EVENT_INVAL_PASSWORD,
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.common.version = AST_SECURITY_EVENT_INVAL_PASSWORD_VERSION,
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.common.service = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.challenge = p->randdata,
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.received_challenge = response_challenge,
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.received_hash = response_hash,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&inval_password));
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}
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void sip_report_auth_success(const struct sip_pvt *p, uint32_t *using_password)
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{
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char session_id[32];
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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 = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.using_password = using_password,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&successful_auth));
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}
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void sip_report_session_limit(const struct sip_pvt *p)
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{
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char session_id[32];
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struct ast_security_event_session_limit session_limit = {
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.common.event_type = AST_SECURITY_EVENT_SESSION_LIMIT,
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.common.version = AST_SECURITY_EVENT_SESSION_LIMIT_VERSION,
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.common.service = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&session_limit));
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}
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void sip_report_failed_challenge_response(const struct sip_pvt *p, const char *response, const char *expected_response)
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{
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char session_id[32];
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char account_id[256];
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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 = "SIP",
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.common.account_id = account_id,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.challenge = p->randdata,
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.response = response,
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.expected_response = expected_response,
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};
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if (!ast_strlen_zero(p->from)) { /* When dialing, show account making call */
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ast_copy_string(account_id, p->from, sizeof(account_id));
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} else {
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ast_copy_string(account_id, p->exten, sizeof(account_id));
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}
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&chal_resp_failed));
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}
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void sip_report_chal_sent(const struct sip_pvt *p)
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{
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char session_id[32];
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char account_id[256];
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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 = "SIP",
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.common.account_id = account_id,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.challenge = p->randdata,
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};
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if (!ast_strlen_zero(p->from)) { /* When dialing, show account making call */
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ast_copy_string(account_id, p->from, sizeof(account_id));
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} else {
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ast_copy_string(account_id, p->exten, sizeof(account_id));
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}
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&chal_sent));
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}
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void sip_report_inval_transport(const struct sip_pvt *p, const char *transport)
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{
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char session_id[32];
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struct ast_security_event_inval_transport inval_transport = {
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.common.event_type = AST_SECURITY_EVENT_INVAL_TRANSPORT,
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.common.version = AST_SECURITY_EVENT_INVAL_TRANSPORT_VERSION,
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.common.service = "SIP",
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.common.account_id = p->exten,
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.common.local_addr = {
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.addr = &p->ourip,
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.transport = security_event_get_transport(p)
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},
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.common.remote_addr = {
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.addr = &p->sa,
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.transport = security_event_get_transport(p)
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},
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.common.session_id = session_id,
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.transport = transport,
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};
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snprintf(session_id, sizeof(session_id), "%p", p);
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ast_security_event_report(AST_SEC_EVT(&inval_transport));
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}
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int sip_report_security_event(const struct sip_pvt *p, const struct sip_request *req, const int res) {
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struct sip_peer *peer_report;
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enum check_auth_result res_report = res;
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struct ast_str *buf;
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char *c;
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const char *authtoken;
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char *reqheader, *respheader;
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int result = 0;
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char aclname[256];
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struct digestkeys keys[] = {
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[K_RESP] = { "response=", "" },
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[K_URI] = { "uri=", "" },
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[K_USER] = { "username=", "" },
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[K_NONCE] = { "nonce=", "" },
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[K_LAST] = { NULL, NULL}
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};
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peer_report = sip_find_peer(p->exten, NULL, TRUE, FINDPEERS, FALSE, 0);
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switch(res_report) {
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case AUTH_DONT_KNOW:
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break;
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case AUTH_SUCCESSFUL:
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if (peer_report) {
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if (ast_strlen_zero(peer_report->secret) && ast_strlen_zero(peer_report->md5secret)) {
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sip_report_auth_success(p, (uint32_t *) 0);
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} else {
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sip_report_auth_success(p, (uint32_t *) 1);
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}
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}
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break;
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case AUTH_CHALLENGE_SENT:
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sip_report_chal_sent(p);
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break;
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case AUTH_SECRET_FAILED:
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case AUTH_USERNAME_MISMATCH:
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sip_auth_headers(WWW_AUTH, &respheader, &reqheader);
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authtoken = sip_get_header(req, reqheader);
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buf = ast_str_thread_get(&check_auth_buf, CHECK_AUTH_BUF_INITLEN);
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ast_str_set(&buf, 0, "%s", authtoken);
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c = buf->str;
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sip_digest_parser(c, keys);
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if (res_report == AUTH_SECRET_FAILED) {
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sip_report_inval_password(p, keys[K_NONCE].s, keys[K_RESP].s);
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} else {
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if (peer_report) {
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sip_report_failed_challenge_response(p, keys[K_USER].s, peer_report->username);
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}
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}
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break;
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case AUTH_NOT_FOUND:
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/* with sip_cfg.alwaysauthreject on, generates 2 events */
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sip_report_invalid_peer(p);
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break;
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case AUTH_FAKE_AUTH:
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sip_report_invalid_peer(p);
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break;
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case AUTH_UNKNOWN_DOMAIN:
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snprintf(aclname, sizeof(aclname), "domain_must_match");
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sip_report_failed_acl(p, aclname);
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break;
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case AUTH_PEER_NOT_DYNAMIC:
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snprintf(aclname, sizeof(aclname), "peer_not_dynamic");
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sip_report_failed_acl(p, aclname);
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break;
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case AUTH_ACL_FAILED:
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/* with sip_cfg.alwaysauthreject on, generates 2 events */
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snprintf(aclname, sizeof(aclname), "device_must_match_acl");
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sip_report_failed_acl(p, aclname);
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break;
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case AUTH_BAD_TRANSPORT:
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sip_report_inval_transport(p, sip_get_transport(req->socket.type));
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break;
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case AUTH_RTP_FAILED:
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break;
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case AUTH_SESSION_LIMIT:
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sip_report_session_limit(p);
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break;
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}
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if (peer_report) {
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sip_unref_peer(peer_report, "sip_report_security_event: sip_unref_peer: from handle_incoming");
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}
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return result;
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}
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