/** int OS_Alert_SendSyslog
* Sends an alert via syslog.
* Returns 1 on success or 0 on error.
*/
int OS_Alert_SendSyslog(alert_data *al_data, SyslogConfig *syslog_config)
{
char *tstamp;
char syslog_msg[OS_SIZE_2048];
/* These will be Malloc'd, so no need to predeclare size, just remember to free! */
char *json_safe_comment;
char *json_safe_message;
/* padding value */
int padding = 0;
/* Invalid socket. */
if(syslog_config->socket < 0)
{
return(0);
}
/* Clearing the memory before insert */
memset(syslog_msg, '\0', OS_SIZE_2048);
/* Looking if location is set */
if(syslog_config->location)
{
if(!OSMatch_Execute(al_data->location,
strlen(al_data->location),
syslog_config->location))
{
return(0);
}
}
/* Looking for the level */
if(syslog_config->level)
{
if(al_data->level < syslog_config->level)
{
return(0);
}
}
/* Looking for rule id */
if(syslog_config->rule_id)
{
int id_i = 0;
while(syslog_config->rule_id[id_i] != 0)
{
if(syslog_config->rule_id[id_i] == al_data->rule)
{
break;
}
id_i++;
}
/* If we found, id is going to be a valid rule */
if(!syslog_config->rule_id[id_i])
{
return(0);
}
}
/* Looking for the group */
if(syslog_config->group)
{
if(!OSMatch_Execute(al_data->group,
strlen(al_data->group),
syslog_config->group))
{
return(0);
}
}
/* Fixing the timestamp to be syslog compatible.
* We have 2008 Jul 10 10:11:23
* Should be: Jul 10 10:11:23
*/
tstamp = al_data->date;
if(strlen(al_data->date) > 14)
{
tstamp+=5;
/* Fixing first digit if the day is < 10 */
if(tstamp[4] == '0')
tstamp[4] = ' ';
}
/* Remove the double quotes from "dangerous" fields */
if( (json_safe_comment = os_strip_char(al_data->comment, '"')) == NULL ) {
return(0);
}
if( (json_safe_message = os_strip_char(al_data->log[0], '"')) == NULL ) {
return(0);
}
/* Inserting data */
if(syslog_config->format == DEFAULT_CSYSLOG)
{
/* Building syslog message. */
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s %s ossec: Alert Level: %d; Rule: %d - %s; Location: %s;",
syslog_config->priority, tstamp, __shost,
al_data->level,
al_data->rule, al_data->comment,
al_data->location
);
field_add_string(syslog_msg, OS_SIZE_2048, " srcip: %s;", al_data->srcip );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " srccity: %s;", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " dstcity: %s;", al_data->geoipdatadst );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " dstip: %s;", al_data->dstip );
field_add_string(syslog_msg, OS_SIZE_2048, " user: %s;", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous MD5: %s;", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current MD5: %s;", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous SHA1: %s;", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current SHA1: %s;", al_data->new_sha1 );
field_add_truncated(syslog_msg, OS_SIZE_2048, " %s", al_data->log[0], 2 );
}
else if(syslog_config->format == CEF_CSYSLOG)
{
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s CEF:0|%s|%s|%s|%d|%s|%d|dvc=%s cs2=%s cs2Label=Location",
syslog_config->priority,
tstamp,
__author,
__ossec_name,
__version,
al_data->rule,
al_data->comment,
(al_data->level > 10) ? 10 : al_data->level,
__shost, al_data->location);
field_add_string(syslog_msg, OS_SIZE_2048, " src=%s", al_data->srcip );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " cs3Label=SrcCity cs3=%s", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " cs4Label=DstCity cs4=%s", al_data->geoipdatadst );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " suser=%s", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " dst=%s", al_data->dstip );
field_add_truncated(syslog_msg, OS_SIZE_2048, " msg=%s", al_data->log[0], 2 );
if (al_data->new_md5 && al_data->new_sha1) {
field_add_string(syslog_msg, OS_SIZE_2048, " Previous MD5: %s", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current MD5: %s", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous SHA1: %s", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current SHA1: %s", al_data->new_sha1 );
}
}
else if(syslog_config->format == JSON_CSYSLOG)
{
// Padding is two to make sure we can fit closign bracket
padding = 2;
/* Build a JSON Object for logging */
snprintf(syslog_msg, OS_SIZE_2048 - padding,
"<%d>%s %s ossec: { \"crit\": %d, \"id\": %d, \"description\": \"%s\", \"component\": \"%s\",",
/* syslog header */
syslog_config->priority, tstamp, __shost,
/* OSSEC metadata */
al_data->level, al_data->rule, json_safe_comment,
al_data->location
);
/* Event specifics */
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"classification\": \"%s\",", al_data->group );
if( field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"src_ip\": \"%s\",", al_data->srcip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048 - padding, " \"src_port\": %d,", al_data->srcport );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"src_city\": \"%s\",", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"dst_city\": \"%s\",", al_data->geoipdatadst );
#endif
if ( field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"dst_ip\": \"%s\",", al_data->dstip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048 - padding, " \"dst_port\": %d,", al_data->dstport );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"file\": \"%s\",", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"acct\": \"%s\",", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"md5_old\": \"%s\",", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"md5_new\": \"%s\",", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"sha1_old\": \"%s\",", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048 - padding, " \"sha1_new\": \"%s\",", al_data->new_sha1 );
/* Message */
field_add_truncated(syslog_msg, OS_SIZE_2048 - padding, " \"message\": \"%s\"", json_safe_message, 2 );
/* Closing brace */
field_add_string(syslog_msg, OS_SIZE_2048, " }", "" );
}
else if(syslog_config->format == SPLUNK_CSYSLOG)
{
/* Build a Splunk Style Key/Value string for logging */
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s %s ossec: crit=%d id=%d description=\"%s\" component=\"%s\",",
/* syslog header */
syslog_config->priority, tstamp, __shost,
/* OSSEC metadata */
al_data->level, al_data->rule, json_safe_comment,
al_data->location
);
/* Event specifics */
field_add_string(syslog_msg, OS_SIZE_2048, " classification=\"%s\",", al_data->group );
if( field_add_string(syslog_msg, OS_SIZE_2048, " src_ip=\"%s\",", al_data->srcip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048, " src_port=%d,", al_data->srcport );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " src_city=\"%s\",", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " dst_city=\"%s\",", al_data->geoipdatadst );
#endif
if( field_add_string(syslog_msg, OS_SIZE_2048, " dst_ip=\"%s\",", al_data->dstip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048, " dst_port=%d,", al_data->dstport );
field_add_string(syslog_msg, OS_SIZE_2048, " file=\"%s\",", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048, " acct=\"%s\",", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_old=\"%s\",", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_new=\"%s\",", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_old=\"%s\",", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_new=\"%s\",", al_data->new_sha1 );
/* Message */
field_add_truncated(syslog_msg, OS_SIZE_2048, " message=\"%s\"", json_safe_message, 2 );
}
OS_SendUDPbySize(syslog_config->socket, strlen(syslog_msg), syslog_msg);
/* Free the malloc'd variables */
free(json_safe_comment);
free(json_safe_message);
return(1);
}
/** int OS_Alert_SendSyslog
* Sends an alert via syslog.
* Returns 1 on success or 0 on error.
*/
int OS_Alert_SendSyslog(alert_data *al_data, SyslogConfig *syslog_config)
{
char *tstamp;
char syslog_msg[OS_SIZE_2048];
/* padding value */
int padding = 0;
/* Invalid socket. */
if(syslog_config->socket < 0)
{
return(0);
}
/* Clearing the memory before insert */
memset(syslog_msg, '\0', OS_SIZE_2048);
/* Looking if location is set */
if(syslog_config->location)
{
if(!OSMatch_Execute(al_data->location,
strlen(al_data->location),
syslog_config->location))
{
return(0);
}
}
/* Looking for the level */
if(syslog_config->level)
{
if(al_data->level < syslog_config->level)
{
return(0);
}
}
/* Looking for rule id */
if(syslog_config->rule_id)
{
int id_i = 0;
while(syslog_config->rule_id[id_i] != 0)
{
if(syslog_config->rule_id[id_i] == al_data->rule)
{
break;
}
id_i++;
}
/* If we found, id is going to be a valid rule */
if(!syslog_config->rule_id[id_i])
{
return(0);
}
}
/* Looking for the group */
if(syslog_config->group)
{
if(!OSMatch_Execute(al_data->group,
strlen(al_data->group),
syslog_config->group))
{
return(0);
}
}
/* Fixing the timestamp to be syslog compatible.
* We have 2008 Jul 10 10:11:23
* Should be: Jul 10 10:11:23
*/
tstamp = al_data->date;
if(strlen(al_data->date) > 14)
{
tstamp+=5;
/* Fixing first digit if the day is < 10 */
if(tstamp[4] == '0')
tstamp[4] = ' ';
}
/* Inserting data */
if(syslog_config->format == DEFAULT_CSYSLOG)
{
/* Building syslog message. */
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s %s ossec: Alert Level: %d; Rule: %d - %s; Location: %s;",
syslog_config->priority, tstamp, __shost,
al_data->level,
al_data->rule, al_data->comment,
al_data->location
);
field_add_string(syslog_msg, OS_SIZE_2048, " srcip: %s;", al_data->srcip );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " srccity: %s;", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " dstcity: %s;", al_data->geoipdatadst );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " dstip: %s;", al_data->dstip );
field_add_string(syslog_msg, OS_SIZE_2048, " user: %s;", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous MD5: %s;", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current MD5: %s;", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous SHA1: %s;", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current SHA1: %s;", al_data->new_sha1 );
field_add_truncated(syslog_msg, OS_SIZE_2048, " %s", al_data->log[0], 2 );
}
else if(syslog_config->format == CEF_CSYSLOG)
{
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s CEF:0|%s|%s|%s|%d|%s|%d|dvc=%s cs2=%s cs2Label=Location",
syslog_config->priority,
tstamp,
__author,
__ossec_name,
__version,
al_data->rule,
al_data->comment,
(al_data->level > 10) ? 10 : al_data->level,
__shost, al_data->location);
field_add_string(syslog_msg, OS_SIZE_2048, " src=%s", al_data->srcip );
field_add_string(syslog_msg, OS_SIZE_2048, " dpt=%s", al_data->dstport );
field_add_string(syslog_msg, OS_SIZE_2048, " spt=%s", al_data->srcport );
field_add_string(syslog_msg, OS_SIZE_2048, " fname=%s", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048, " dhost=%s", al_data->dstip );
field_add_string(syslog_msg, OS_SIZE_2048, " shost=%s", al_data->srcip );
field_add_string(syslog_msg, OS_SIZE_2048, " suser=%s", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " dst=%s", al_data->dstip );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " cs3Label=SrcCity cs3=%s", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " cs4Label=DstCity cs4=%s", al_data->geoipdatadst );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " suser=%s", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " dst=%s", al_data->dstip );
field_add_truncated(syslog_msg, OS_SIZE_2048, " msg=%s", al_data->log[0], 2 );
if (al_data->new_md5 && al_data->new_sha1) {
field_add_string(syslog_msg, OS_SIZE_2048, " cs1Label=OldMD5 cs1=%s", al_data->old_md5);
field_add_string(syslog_msg, OS_SIZE_2048, " cs2Label=NewMDG cs2=%s", al_data->new_md5);
field_add_string(syslog_msg, OS_SIZE_2048, " oldFileHash=%s", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " fhash=%s", al_data->new_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " fileHash=%s", al_data->new_sha1 );
}
}
else if(syslog_config->format == JSON_CSYSLOG)
{
/* Build a JSON Object for logging */
cJSON *root;
char *json_string;
root = cJSON_CreateObject();
// Data guaranteed to be there
cJSON_AddNumberToObject(root, "crit", al_data->level);
cJSON_AddNumberToObject(root, "id", al_data->rule);
cJSON_AddStringToObject(root, "component", al_data->location);
// Rule Meta Data
if (al_data->group) cJSON_AddStringToObject(root, "classification", al_data->group);
if (al_data->comment) cJSON_AddStringToObject(root, "description", al_data->comment);
// Raw log message generating event
if (al_data->log && al_data->log[0])
cJSON_AddStringToObject(root, "message", al_data->log[0]);
// Add data if it exists
if (al_data->user) cJSON_AddStringToObject(root, "acct", al_data->user);
if (al_data->srcip) cJSON_AddStringToObject(root, "src_ip", al_data->srcip);
if (al_data->srcport) cJSON_AddNumberToObject(root, "src_port", al_data->srcport);
if (al_data->dstip) cJSON_AddStringToObject(root, "dst_ip", al_data->dstip);
if (al_data->dstport) cJSON_AddNumberToObject(root, "dst_port", al_data->dstport);
if (al_data->filename) cJSON_AddStringToObject(root, "file", al_data->filename);
if (al_data->old_md5) cJSON_AddStringToObject(root, "md5_old", al_data->old_md5);
if (al_data->new_md5) cJSON_AddStringToObject(root, "md5_new", al_data->new_md5);
if (al_data->old_sha1) cJSON_AddStringToObject(root, "sha1_old", al_data->old_sha1);
if (al_data->new_sha1) cJSON_AddStringToObject(root, "sha1_new", al_data->new_sha1);
#ifdef GEOIP
if (al_data->geoipdatasrc) cJSON_AddStringToObject(root, "src_city", al_data->geoipdatasrc);
if (al_data->geoipdatadst) cJSON_AddStringToObject(root, "dst_city", al_data->geoipdatadst);
#endif
// Create the JSON String
json_string = cJSON_PrintUnformatted(root);
// Create the syslog message
snprintf(syslog_msg, OS_SIZE_2048 - padding,
"<%d>%s %s ossec: %s",
/* syslog header */
syslog_config->priority, tstamp, __shost,
/* JSON Encoded Data */
json_string
);
// Cleanup the memory for the JSON Structure
free(json_string);
cJSON_Delete(root);
}
else if(syslog_config->format == SPLUNK_CSYSLOG)
{
/* Build a Splunk Style Key/Value string for logging */
snprintf(syslog_msg, OS_SIZE_2048,
"<%d>%s %s ossec: crit=%d id=%d description=\"%s\" component=\"%s\",",
/* syslog header */
syslog_config->priority, tstamp, __shost,
/* OSSEC metadata */
al_data->level, al_data->rule, al_data->comment,
al_data->location
);
/* Event specifics */
field_add_string(syslog_msg, OS_SIZE_2048, " classification=\"%s\",", al_data->group );
if( field_add_string(syslog_msg, OS_SIZE_2048, " src_ip=\"%s\",", al_data->srcip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048, " src_port=%d,", al_data->srcport );
#ifdef GEOIP
field_add_string(syslog_msg, OS_SIZE_2048, " src_city=\"%s\",", al_data->geoipdatasrc );
field_add_string(syslog_msg, OS_SIZE_2048, " dst_city=\"%s\",", al_data->geoipdatadst );
#endif
if( field_add_string(syslog_msg, OS_SIZE_2048, " dst_ip=\"%s\",", al_data->dstip ) > 0 )
field_add_int(syslog_msg, OS_SIZE_2048, " dst_port=%d,", al_data->dstport );
field_add_string(syslog_msg, OS_SIZE_2048, " file=\"%s\",", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048, " acct=\"%s\",", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_old=\"%s\",", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_new=\"%s\",", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_old=\"%s\",", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_new=\"%s\",", al_data->new_sha1 );
/* Message */
field_add_truncated(syslog_msg, OS_SIZE_2048, " message=\"%s\"", al_data->log[0], 2 );
}
OS_SendUDPbySize(syslog_config->socket, strlen(syslog_msg), syslog_msg);
return(1);
}
/* Send an alert via syslog
* Returns 1 on success or 0 on error
*/
int OS_Alert_SendSyslog(alert_data *al_data, const SyslogConfig *syslog_config)
{
char *tstamp;
char *hostname;
char syslog_msg[OS_SIZE_2048];
/* Invalid socket */
if (syslog_config->socket < 0) {
return (0);
}
/* Clear the memory before insert */
memset(syslog_msg, '\0', OS_SIZE_2048);
/* Look if location is set */
if (syslog_config->location) {
if (!OSMatch_Execute(al_data->location,
strlen(al_data->location),
syslog_config->location)) {
return (0);
}
}
/* Look for the level */
if (syslog_config->level) {
if (al_data->level < syslog_config->level) {
return (0);
}
}
/* Look for rule id */
if (syslog_config->rule_id) {
int id_i = 0;
while (syslog_config->rule_id[id_i] != 0) {
if (syslog_config->rule_id[id_i] == al_data->rule) {
break;
}
id_i++;
}
/* If we found, id is going to be a valid rule */
if (!syslog_config->rule_id[id_i]) {
return (0);
}
}
/* Look for the group */
if (syslog_config->group) {
if (!OSMatch_Execute(al_data->group,
strlen(al_data->group),
syslog_config->group)) {
return (0);
}
}
/* Fix the timestamp to be syslog compatible
* We have 2008 Jul 10 10:11:23
* Should be: Jul 10 10:11:23
*/
tstamp = al_data->date;
if (strlen(al_data->date) > 14) {
tstamp += 5;
/* Fix first digit if the day is < 10 */
if (tstamp[4] == '0') {
tstamp[4] = ' ';
}
}
if (syslog_config->use_fqdn) {
hostname = __shost_long;
} else {
hostname = __shost;
}
/* Insert data */
if (syslog_config->format == DEFAULT_CSYSLOG) {
/* Build syslog message */
snprintf(syslog_msg, OS_SIZE_2048,
"<%u>%s %s ossec: Alert Level: %u; Rule: %u - %s; Location: %s;",
syslog_config->priority, tstamp, hostname,
al_data->level,
al_data->rule, al_data->comment,
al_data->location
);
field_add_string(syslog_msg, OS_SIZE_2048, " classification: %s;", al_data->group );
field_add_string(syslog_msg, OS_SIZE_2048, " srcip: %s;", al_data->srcip );
#ifdef LIBGEOIP_ENABLED
field_add_string(syslog_msg, OS_SIZE_2048, " srccity: %s;", al_data->srcgeoip );
field_add_string(syslog_msg, OS_SIZE_2048, " dstcity: %s;", al_data->dstgeoip );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " dstip: %s;", al_data->dstip );
field_add_string(syslog_msg, OS_SIZE_2048, " user: %s;", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous MD5: %s;", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current MD5: %s;", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " Previous SHA1: %s;", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " Current SHA1: %s;", al_data->new_sha1 );
/* "9/19/2016 - Sivakumar Nellurandi - parsing additions" */
field_add_string(syslog_msg, OS_SIZE_2048, " Size changed: from %s;", al_data->file_size );
field_add_string(syslog_msg, OS_SIZE_2048, " User ownership: was %s;", al_data->owner_chg );
field_add_string(syslog_msg, OS_SIZE_2048, " Group ownership: was %s;", al_data->group_chg );
field_add_string(syslog_msg, OS_SIZE_2048, " Permissions changed: from %s;", al_data->perm_chg );
/* "9/19/2016 - Sivakumar Nellurandi - parsing additions" */
field_add_truncated(syslog_msg, OS_SIZE_2048, " %s", al_data->log[0], 2 );
} else if (syslog_config->format == CEF_CSYSLOG) {
snprintf(syslog_msg, OS_SIZE_2048,
"<%u>%s CEF:0|%s|%s|%s|%u|%s|%u|dvc=%s cs1=%s cs1Label=Location",
syslog_config->priority,
tstamp,
__author,
__ossec_name,
__version,
al_data->rule,
al_data->comment,
(al_data->level > 10) ? 10 : al_data->level,
hostname, al_data->location);
field_add_string(syslog_msg, OS_SIZE_2048, " classification=%s", al_data->group );
field_add_string(syslog_msg, OS_SIZE_2048, " src=%s", al_data->srcip );
field_add_int(syslog_msg, OS_SIZE_2048, " dpt=%d", al_data->dstport );
field_add_int(syslog_msg, OS_SIZE_2048, " spt=%d", al_data->srcport );
field_add_string(syslog_msg, OS_SIZE_2048, " fname=%s", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048, " dhost=%s", al_data->dstip );
field_add_string(syslog_msg, OS_SIZE_2048, " shost=%s", al_data->srcip );
field_add_string(syslog_msg, OS_SIZE_2048, " suser=%s", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " dst=%s", al_data->dstip );
#ifdef LIBGEOIP_ENABLED
field_add_string(syslog_msg, OS_SIZE_2048, " cs4Label=SrcCity cs4=%s", al_data->srcgeoip );
field_add_string(syslog_msg, OS_SIZE_2048, " cs5Label=DstCity cs5=%s", al_data->dstgeoip );
#endif
field_add_string(syslog_msg, OS_SIZE_2048, " suser=%s", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " dst=%s", al_data->dstip );
field_add_truncated(syslog_msg, OS_SIZE_2048, " msg=%s", al_data->log[0], 2 );
if (al_data->new_md5 && al_data->new_sha1) {
field_add_string(syslog_msg, OS_SIZE_2048, " cs2Label=OldMD5 cs2=%s", al_data->old_md5);
field_add_string(syslog_msg, OS_SIZE_2048, " cs3Label=NewMD5 cs3=%s", al_data->new_md5);
field_add_string(syslog_msg, OS_SIZE_2048, " oldFileHash=%s", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " fhash=%s", al_data->new_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " fileHash=%s", al_data->new_sha1 );
}
} else if (syslog_config->format == JSON_CSYSLOG) {
/* Build a JSON Object for logging */
cJSON *root;
char *json_string;
root = cJSON_CreateObject();
/* Data guaranteed to be there */
cJSON_AddNumberToObject(root, "crit", al_data->level);
cJSON_AddNumberToObject(root, "id", al_data->rule);
cJSON_AddStringToObject(root, "component", al_data->location);
/* Rule Meta Data */
if (al_data->group) {
cJSON_AddStringToObject(root, "classification", al_data->group);
}
if (al_data->comment) {
cJSON_AddStringToObject(root, "description", al_data->comment);
}
/* Raw log message generating event */
if (al_data->log && al_data->log[0]) {
cJSON_AddStringToObject(root, "message", al_data->log[0]);
}
/* Add data if it exists */
if (al_data->user) {
cJSON_AddStringToObject(root, "acct", al_data->user);
}
if (al_data->srcip) {
cJSON_AddStringToObject(root, "src_ip", al_data->srcip);
}
if (al_data->srcport) {
cJSON_AddNumberToObject(root, "src_port", al_data->srcport);
}
if (al_data->dstip) {
cJSON_AddStringToObject(root, "dst_ip", al_data->dstip);
}
if (al_data->dstport) {
cJSON_AddNumberToObject(root, "dst_port", al_data->dstport);
}
if (al_data->filename) {
cJSON_AddStringToObject(root, "file", al_data->filename);
}
if (al_data->old_md5) {
cJSON_AddStringToObject(root, "md5_old", al_data->old_md5);
}
if (al_data->new_md5) {
cJSON_AddStringToObject(root, "md5_new", al_data->new_md5);
}
if (al_data->old_sha1) {
cJSON_AddStringToObject(root, "sha1_old", al_data->old_sha1);
}
if (al_data->new_sha1) {
cJSON_AddStringToObject(root, "sha1_new", al_data->new_sha1);
}
#ifdef LIBGEOIP_ENABLED
if (al_data->srcgeoip) {
cJSON_AddStringToObject(root, "src_city", al_data->srcgeoip);
}
if (al_data->dstgeoip) {
cJSON_AddStringToObject(root, "dst_city", al_data->dstgeoip);
}
#endif
/* Create the JSON string */
json_string = cJSON_PrintUnformatted(root);
/* Create the syslog message */
snprintf(syslog_msg, OS_SIZE_2048,
"<%u>%s %s ossec: %s",
/* syslog header */
syslog_config->priority, tstamp, hostname,
/* JSON Encoded Data */
json_string
);
/* Clean up the memory for the JSON structure */
free(json_string);
cJSON_Delete(root);
} else if (syslog_config->format == SPLUNK_CSYSLOG) {
/* Build a Splunk Style Key/Value string for logging */
snprintf(syslog_msg, OS_SIZE_2048,
"<%u>%s %s ossec: crit=%u id=%u description=\"%s\" component=\"%s\",",
/* syslog header */
syslog_config->priority, tstamp, hostname,
/* OSSEC metadata */
al_data->level, al_data->rule, al_data->comment,
al_data->location
);
/* Event specifics */
field_add_string(syslog_msg, OS_SIZE_2048, " classification=\"%s\",", al_data->group );
if ( field_add_string(syslog_msg, OS_SIZE_2048, " src_ip=\"%s\",", al_data->srcip ) > 0 ) {
field_add_int(syslog_msg, OS_SIZE_2048, " src_port=%d,", al_data->srcport );
}
#ifdef LIBGEOIP_ENABLED
field_add_string(syslog_msg, OS_SIZE_2048, " src_city=\"%s\",", al_data->srcgeoip );
field_add_string(syslog_msg, OS_SIZE_2048, " dst_city=\"%s\",", al_data->dstgeoip );
#endif
if ( field_add_string(syslog_msg, OS_SIZE_2048, " dst_ip=\"%s\",", al_data->dstip ) > 0 ) {
field_add_int(syslog_msg, OS_SIZE_2048, " dst_port=%d,", al_data->dstport );
}
field_add_string(syslog_msg, OS_SIZE_2048, " file=\"%s\",", al_data->filename );
field_add_string(syslog_msg, OS_SIZE_2048, " acct=\"%s\",", al_data->user );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_old=\"%s\",", al_data->old_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " md5_new=\"%s\",", al_data->new_md5 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_old=\"%s\",", al_data->old_sha1 );
field_add_string(syslog_msg, OS_SIZE_2048, " sha1_new=\"%s\",", al_data->new_sha1 );
/* Message */
field_add_truncated(syslog_msg, OS_SIZE_2048, " message=\"%s\"", al_data->log[0], 2 );
}
OS_SendUDPbySize(syslog_config->socket, strlen(syslog_msg), syslog_msg);
return (1);
}
