mirror of https://github.com/OISF/suricata
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
255 lines
8.5 KiB
C
255 lines
8.5 KiB
C
11 years ago
|
/* Copyright (C) 2007-2014 Open Information Security Foundation
|
||
|
*
|
||
|
* You can copy, redistribute or modify this Program under the terms of
|
||
|
* the GNU General Public License version 2 as published by the Free
|
||
|
* Software Foundation.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
* GNU General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* version 2 along with this program; if not, write to the Free Software
|
||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||
|
* 02110-1301, USA.
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* \file
|
||
|
*
|
||
|
* \author Tom DeCanio <td@npulsetech.com>
|
||
|
*
|
||
|
* Implements json common email logging portion of the engine.
|
||
|
*/
|
||
|
|
||
|
#include "suricata-common.h"
|
||
|
#include "debug.h"
|
||
|
#include "detect.h"
|
||
|
#include "pkt-var.h"
|
||
|
#include "conf.h"
|
||
|
|
||
|
#include "threads.h"
|
||
|
#include "threadvars.h"
|
||
|
#include "tm-threads.h"
|
||
|
#include "tm-threads-common.h"
|
||
|
|
||
|
#include "util-print.h"
|
||
|
#include "util-unittest.h"
|
||
|
|
||
|
#include "util-debug.h"
|
||
|
#include "app-layer-parser.h"
|
||
|
#include "output.h"
|
||
|
#include "app-layer-smtp.h"
|
||
|
#include "app-layer.h"
|
||
|
#include "util-privs.h"
|
||
|
#include "util-buffer.h"
|
||
|
#include "util-byte.h"
|
||
|
|
||
|
#include "util-logopenfile.h"
|
||
|
#include "util-crypt.h"
|
||
|
|
||
|
#include "output-json.h"
|
||
|
#include "output-json-email-common.h"
|
||
|
|
||
|
#ifdef HAVE_LIBJANSSON
|
||
|
#include <jansson.h>
|
||
|
|
||
|
/* JSON format logging */
|
||
|
static TmEcode JsonEmailLogJson(JsonEmailLogThread *aft,
|
||
|
json_t *js,
|
||
|
const Packet *p)
|
||
|
{
|
||
|
SMTPState *smtp_state;
|
||
|
MimeDecParseState *mime_state;
|
||
|
MimeDecEntity *entity;
|
||
|
char *protos = NULL;
|
||
|
|
||
|
/* no flow, no smtp state */
|
||
|
if (p->flow == NULL) {
|
||
|
SCReturnInt(TM_ECODE_FAILED);
|
||
|
}
|
||
|
|
||
|
json_t *sjs = json_object();
|
||
|
if (sjs == NULL) {
|
||
|
SCReturnInt(TM_ECODE_FAILED);
|
||
|
}
|
||
|
|
||
|
/* check if we have SMTP state or not */
|
||
|
FLOWLOCK_WRLOCK(p->flow); /* WRITE lock before we updated flow logged id */
|
||
|
AppProto proto = FlowGetAppProtocol(p->flow);
|
||
|
switch (proto) {
|
||
|
case ALPROTO_SMTP:
|
||
|
smtp_state = (SMTPState *)FlowGetAppState(p->flow);
|
||
|
if (smtp_state == NULL) {
|
||
|
SCLogDebug("no smtp state, so no request logging");
|
||
|
FLOWLOCK_UNLOCK(p->flow);
|
||
|
SCReturnInt(TM_ECODE_FAILED);
|
||
|
}
|
||
|
mime_state = smtp_state->mime_state;
|
||
|
entity = smtp_state->msg_tail;
|
||
|
protos = "smtp";
|
||
|
break;
|
||
|
default:
|
||
|
/* don't know how we got here */
|
||
|
FLOWLOCK_UNLOCK(p->flow);
|
||
|
SCReturnInt(TM_ECODE_FAILED);
|
||
|
}
|
||
|
if ((mime_state != NULL) &&
|
||
|
(mime_state->state_flag == PARSE_DONE)) {
|
||
|
|
||
|
if (entity == NULL) {
|
||
|
FLOWLOCK_UNLOCK(p->flow);
|
||
|
SCReturnInt(TM_ECODE_FAILED);
|
||
|
}
|
||
|
|
||
|
if ((entity->header_flags & HDR_IS_LOGGED) == 0) {
|
||
|
MimeDecField *field;
|
||
|
//printf("email LOG\n");
|
||
|
|
||
|
/* From: */
|
||
|
field = MimeDecFindField(entity, "From");
|
||
|
if (field != NULL) {
|
||
|
char *s = BytesToString((uint8_t *)field->value,
|
||
|
(size_t)field->value_len);
|
||
|
if (likely(s != NULL)) {
|
||
|
//printf("From: \"%s\"\n", s);
|
||
|
json_object_set_new(sjs, "from", json_string(s));
|
||
|
SCFree(s);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* To: */
|
||
|
char *to_line = NULL;
|
||
|
field = MimeDecFindField(entity, "To");
|
||
|
if (field != NULL) {
|
||
|
json_t *js_to = json_array();
|
||
|
if (likely(js_to != NULL)) {
|
||
|
char *savep;
|
||
|
char *p;
|
||
|
to_line = BytesToString((uint8_t *)field->value,
|
||
|
(size_t)field->value_len);
|
||
|
//printf("to_line:: TO: \"%s\" (%d)\n", to_line, strlen(to_line));
|
||
|
p = strtok_r(to_line, ",", &savep);
|
||
|
//printf("got another addr: \"%s\"\n", p);
|
||
|
json_array_append_new(js_to, json_string(p));
|
||
|
while ((p = strtok_r(NULL, ",", &savep)) != NULL) {
|
||
|
//printf("got another addr: \"%s\"\n", p);
|
||
|
json_array_append_new(js_to, json_string(&p[strspn(p, " ")]));
|
||
|
}
|
||
|
json_object_set_new(sjs, "to", js_to);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Cc: */
|
||
|
char *cc_line = NULL;
|
||
|
field = MimeDecFindField(entity, "Cc");
|
||
|
if (field != NULL) {
|
||
|
json_t *js_cc = json_array();
|
||
|
if (likely(js_cc != NULL)) {
|
||
|
char *savep;
|
||
|
char *p;
|
||
|
cc_line = BytesToString((uint8_t *)field->value,
|
||
|
(size_t)field->value_len);
|
||
|
//printf("cc_line:: CC: \"%s\" (%d)\n", to_line, strlen(to_line));
|
||
|
p = strtok_r(cc_line, ",", &savep);
|
||
|
//printf("got another addr: \"%s\"\n", p);
|
||
|
json_array_append_new(js_cc, json_string(p));
|
||
|
while ((p = strtok_r(NULL, ",", &savep)) != NULL) {
|
||
|
//printf("got another addr: \"%s\"\n", p);
|
||
|
json_array_append_new(js_cc, json_string(&p[strspn(p, " ")]));
|
||
|
}
|
||
|
json_object_set_new(sjs, "cc", js_cc);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Subject: */
|
||
|
field = MimeDecFindField(entity, "Subject");
|
||
|
if (field != NULL) {
|
||
|
char *s = strndup(field->value, (int) field->value_len);
|
||
|
if (likely(s != NULL)) {
|
||
|
//printf("Subject: \"%s\"\n", s);
|
||
|
json_object_set_new(sjs, "subject", json_string(s));
|
||
|
SCFree(s);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
entity->header_flags |= HDR_IS_LOGGED;
|
||
|
|
||
|
entity = (MimeDecEntity *)mime_state->stack->top->data;
|
||
|
int attch_cnt = 0;
|
||
|
int url_cnt = 0;
|
||
|
json_t *js_attch = json_array();
|
||
|
json_t *js_url = json_array();
|
||
|
for (entity = entity->child; entity != NULL; entity = entity->next) {
|
||
|
if (entity->ctnt_flags & CTNT_IS_ATTACHMENT) {
|
||
|
|
||
|
char *s = BytesToString((uint8_t *)entity->filename,
|
||
|
(size_t)entity->filename_len);
|
||
|
//printf("found attachment \"%s\"\n", s);
|
||
|
json_array_append_new(js_attch,
|
||
|
json_string(s));
|
||
|
SCFree(s);
|
||
|
attch_cnt += 1;
|
||
|
}
|
||
|
if (entity->url_list != NULL) {
|
||
|
MimeDecUrl *url;
|
||
|
for (url = entity->url_list; url != NULL; url = url->next) {
|
||
|
char *s = BytesToString((uint8_t *)url->url,
|
||
|
(size_t)url->url_len);
|
||
|
if (s != NULL) {
|
||
|
//printf("URL: \"%s\"\n", s);
|
||
|
json_array_append_new(js_url,
|
||
|
json_string(s));
|
||
|
SCFree(s);
|
||
|
url_cnt += 1;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
if (attch_cnt > 0) {
|
||
|
json_object_set_new(sjs, "attachment", js_attch);
|
||
|
} else {
|
||
|
json_decref(js_attch);
|
||
|
}
|
||
|
if (url_cnt > 0) {
|
||
|
json_object_set_new(sjs, "url", js_url);
|
||
|
} else {
|
||
|
json_decref(js_url);
|
||
|
}
|
||
|
json_object_set_new(js, protos, sjs);
|
||
|
|
||
|
FLOWLOCK_UNLOCK(p->flow);
|
||
|
SCReturnInt(TM_ECODE_OK);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
FLOWLOCK_UNLOCK(p->flow);
|
||
|
SCReturnInt(TM_ECODE_DONE);
|
||
|
}
|
||
|
|
||
|
int JsonEmailLogger(ThreadVars *tv, void *thread_data, const Packet *p) {
|
||
|
SCEnter();
|
||
|
JsonEmailLogThread *jhl = (JsonEmailLogThread *)thread_data;
|
||
|
MemBuffer *buffer = (MemBuffer *)jhl->buffer;
|
||
|
|
||
|
json_t *js = CreateJSONHeader((Packet *)p, 1, "smtp");
|
||
|
if (unlikely(js == NULL))
|
||
|
return TM_ECODE_OK;
|
||
|
|
||
|
/* reset */
|
||
|
MemBufferReset(buffer);
|
||
|
|
||
|
if (JsonEmailLogJson(jhl, js, p) == TM_ECODE_OK) {
|
||
|
OutputJSONBuffer(js, jhl->emaillog_ctx->file_ctx, buffer);
|
||
|
}
|
||
|
json_object_del(js, "smtp");
|
||
|
|
||
|
json_object_clear(js);
|
||
|
json_decref(js);
|
||
|
|
||
|
SCReturnInt(TM_ECODE_OK);
|
||
|
}
|
||
|
|
||
|
#endif
|