mirror of https://github.com/OISF/suricata
Add logger for Kerberos 5 metadata
Pierre Chifflier
8 years ago
parent
77f0c11c9e
commit
fd175f2bfb
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/* Copyright (C) 2018 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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// written by Pierre Chifflier <chifflier@wzdftpd.net>
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use json::*;
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use krb::krb5::{KRB5State,KRB5Transaction};
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#[no_mangle]
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pub extern "C" fn rs_krb5_log_json_response(_state: &mut KRB5State, tx: &mut KRB5Transaction) -> *mut JsonT
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{
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let js = Json::object();
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js.set_string("msg_type", &format!("{:?}", tx.msg_type));
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// XXX PrincipalName object should be pretty-printed
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let cname = match tx.cname {
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Some(ref x) => format!("{}", x),
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None => "<empty>".to_owned(),
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};
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let realm = match tx.realm {
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Some(ref x) => format!("{}", x.0),
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None => "<empty>".to_owned(),
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};
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// XXX PrincipalName object should be pretty-printed
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let sname = match tx.sname {
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Some(ref x) => format!("{}", x),
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None => "<empty>".to_owned(),
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};
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let encryption = match tx.etype {
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Some(ref x) => format!("{:?}", x),
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None => "<none>".to_owned(),
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};
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js.set_string("cname", &cname);
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js.set_string("realm", &realm);
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js.set_string("sname", &sname);
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js.set_string("encryption", &encryption);
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return js.unwrap();
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}
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@ -0,0 +1,202 @@
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/* Copyright (C) 2018 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Pierre Chifflier <chifflier@wzdftpd.net>
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*
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* Implement JSON/eve logging app-layer KRB5.
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*/
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#include "suricata-common.h"
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#include "debug.h"
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#include "detect.h"
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#include "pkt-var.h"
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#include "conf.h"
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#include "threads.h"
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#include "threadvars.h"
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#include "tm-threads.h"
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#include "util-unittest.h"
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#include "util-buffer.h"
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#include "util-debug.h"
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#include "util-byte.h"
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#include "output.h"
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#include "output-json.h"
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#include "app-layer.h"
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#include "app-layer-parser.h"
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#include "app-layer-krb5.h"
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#include "output-json-krb5.h"
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#ifdef HAVE_RUST
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#ifdef HAVE_LIBJANSSON
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#include "rust.h"
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#include "rust-krb-log-gen.h"
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typedef struct LogKRB5FileCtx_ {
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LogFileCtx *file_ctx;
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uint32_t flags;
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bool include_metadata;
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} LogKRB5FileCtx;
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typedef struct LogKRB5LogThread_ {
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LogKRB5FileCtx *krb5log_ctx;
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uint32_t count;
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MemBuffer *buffer;
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} LogKRB5LogThread;
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static int JsonKRB5Logger(ThreadVars *tv, void *thread_data,
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const Packet *p, Flow *f, void *state, void *tx, uint64_t tx_id)
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{
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KRB5Transaction *krb5tx = tx;
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LogKRB5LogThread *thread = thread_data;
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json_t *js, *krb5js;
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js = CreateJSONHeader(p, LOG_DIR_PACKET, "krb5");
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if (unlikely(js == NULL)) {
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return TM_ECODE_FAILED;
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}
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if (thread->krb5log_ctx->include_metadata) {
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JsonAddMetadata(p, f, js);
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}
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krb5js = rs_krb5_log_json_response(state, krb5tx);
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if (unlikely(krb5js == NULL)) {
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goto error;
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}
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json_object_set_new(js, "krb5", krb5js);
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MemBufferReset(thread->buffer);
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OutputJSONBuffer(js, thread->krb5log_ctx->file_ctx, &thread->buffer);
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json_decref(js);
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return TM_ECODE_OK;
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error:
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json_decref(js);
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return TM_ECODE_FAILED;
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}
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static void OutputKRB5LogDeInitCtxSub(OutputCtx *output_ctx)
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{
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LogKRB5FileCtx *krb5log_ctx = (LogKRB5FileCtx *)output_ctx->data;
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SCFree(krb5log_ctx);
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SCFree(output_ctx);
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}
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static OutputInitResult OutputKRB5LogInitSub(ConfNode *conf,
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OutputCtx *parent_ctx)
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{
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OutputInitResult result = { NULL, false };
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OutputJsonCtx *ajt = parent_ctx->data;
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LogKRB5FileCtx *krb5log_ctx = SCCalloc(1, sizeof(*krb5log_ctx));
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if (unlikely(krb5log_ctx == NULL)) {
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return result;
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}
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krb5log_ctx->file_ctx = ajt->file_ctx;
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krb5log_ctx->include_metadata = ajt->include_metadata;
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OutputCtx *output_ctx = SCCalloc(1, sizeof(*output_ctx));
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if (unlikely(output_ctx == NULL)) {
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SCFree(krb5log_ctx);
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return result;
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}
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output_ctx->data = krb5log_ctx;
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output_ctx->DeInit = OutputKRB5LogDeInitCtxSub;
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SCLogDebug("KRB5 log sub-module initialized.");
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AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_KRB5);
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result.ctx = output_ctx;
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result.ok = true;
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return result;
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}
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#define OUTPUT_BUFFER_SIZE 65535
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static TmEcode JsonKRB5LogThreadInit(ThreadVars *t, const void *initdata, void **data)
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{
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LogKRB5LogThread *thread = SCCalloc(1, sizeof(*thread));
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if (unlikely(thread == NULL)) {
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return TM_ECODE_FAILED;
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}
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if (initdata == NULL) {
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SCLogDebug("Error getting context for EveLogKRB5. \"initdata\" is NULL.");
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SCFree(thread);
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return TM_ECODE_FAILED;
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}
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thread->buffer = MemBufferCreateNew(OUTPUT_BUFFER_SIZE);
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if (unlikely(thread->buffer == NULL)) {
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SCFree(thread);
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return TM_ECODE_FAILED;
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}
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thread->krb5log_ctx = ((OutputCtx *)initdata)->data;
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*data = (void *)thread;
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return TM_ECODE_OK;
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}
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static TmEcode JsonKRB5LogThreadDeinit(ThreadVars *t, void *data)
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{
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LogKRB5LogThread *thread = (LogKRB5LogThread *)data;
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if (thread == NULL) {
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return TM_ECODE_OK;
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}
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if (thread->buffer != NULL) {
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MemBufferFree(thread->buffer);
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}
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SCFree(thread);
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return TM_ECODE_OK;
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}
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void JsonKRB5LogRegister(void)
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{
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/* Register as an eve sub-module. */
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OutputRegisterTxSubModule(LOGGER_JSON_KRB5, "eve-log", "JsonKRB5Log",
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"eve-log.krb5", OutputKRB5LogInitSub, ALPROTO_KRB5,
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JsonKRB5Logger, JsonKRB5LogThreadInit,
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JsonKRB5LogThreadDeinit, NULL);
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SCLogDebug("KRB5 JSON logger registered.");
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}
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#else /* No JSON support. */
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void JsonKRB5LogRegister(void)
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{
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}
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#endif /* HAVE_LIBJANSSON */
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#else /* No rust support. */
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void JsonKRB5LogRegister(void)
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{
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}
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#endif /* HAVE_RUST */
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@ -0,0 +1,29 @@
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/* Copyright (C) 2015 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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||||
*
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||||
* You should have received a copy of the GNU General Public License
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||||
* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author FirstName LastName <name@domain>
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*/
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#ifndef __OUTPUT_JSON_KRB5_H__
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#define __OUTPUT_JSON_KRB5_H__
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void JsonKRB5LogRegister(void);
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#endif /* __OUTPUT_JSON_KRB5_H__ */
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