mirror of https://github.com/OISF/suricata
detect/ssh: move ssh.hassh to rust
Introduces helper SCDetectRegisterBufferLowerMd5Callbackspull/14712/head
Philippe Antoine
8 months ago
committed by
Victor Julien
parent
14c78d8405
commit
2cf9a327d5
@ -1,144 +0,0 @@
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/* Copyright (C) 2007-2020 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 Vadym Malakhatko <v.malakhatko@sirinsoftware.com>
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*/
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#include "suricata-common.h"
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#include "threads.h"
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#include "decode.h"
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#include "detect.h"
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#include "detect-parse.h"
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#include "detect-content.h"
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#include "detect-engine.h"
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#include "detect-engine-buffer.h"
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#include "detect-engine-mpm.h"
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#include "detect-engine-state.h"
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#include "detect-engine-prefilter.h"
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#include "flow.h"
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#include "flow-var.h"
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#include "flow-util.h"
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#include "stream-tcp.h"
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#include "util-debug.h"
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#include "util-unittest.h"
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#include "util-unittest-helper.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-ssh.h"
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#include "detect-ssh-hassh-server.h"
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#include "rust.h"
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#define KEYWORD_NAME "ssh.hassh.server"
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#define KEYWORD_ALIAS "ssh-hassh-server"
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#define KEYWORD_DOC "ssh-keywords.html#ssh.hassh.server"
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#define BUFFER_NAME "ssh.hassh.server"
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#define BUFFER_DESC "Ssh Client Fingerprinting For Ssh Servers"
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static int g_ssh_hassh_buffer_id = 0;
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static InspectionBuffer *GetSshData(DetectEngineThreadCtx *det_ctx,
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const DetectEngineTransforms *transforms, Flow *_f,
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const uint8_t flow_flags, void *txv, const int list_id)
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{
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SCEnter();
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InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
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if (buffer->inspect == NULL) {
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const uint8_t *hasshServer = NULL;
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uint32_t b_len = 0;
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if (SCSshTxGetHassh(txv, &hasshServer, &b_len, flow_flags) != 1)
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return NULL;
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if (hasshServer == NULL || b_len == 0) {
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SCLogDebug("SSH hassh not set");
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return NULL;
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}
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InspectionBufferSetupAndApplyTransforms(
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det_ctx, list_id, buffer, hasshServer, b_len, transforms);
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}
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return buffer;
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}
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/**
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* \brief this function setup the ssh.hassh.server modifier keyword used in the rule
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*
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* \param de_ctx Pointer to the Detection Engine Context
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* \param s Pointer to the Signature to which the current keyword belongs
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* \param str Should hold an empty string always
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*
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* \retval 0 On success
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* \retval -1 On failure
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* \retval -2 on failure that should be silent after the first
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*/
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static int DetectSshHasshServerSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
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{
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if (SCDetectBufferSetActiveList(de_ctx, s, g_ssh_hassh_buffer_id) < 0)
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return -1;
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if (SCDetectSignatureSetAppProto(s, ALPROTO_SSH) < 0)
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return -1;
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/* try to enable Hassh */
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SCSshEnableHassh();
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/* Check if Hassh is disabled */
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if (!RunmodeIsUnittests() && !SCSshHasshIsEnabled()) {
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if (!SCSigMatchSilentErrorEnabled(de_ctx, DETECT_SSH_HASSH_SERVER)) {
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SCLogError("hassh support is not enabled");
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}
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return -2;
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}
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return 0;
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}
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/**
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* \brief Registration function for hasshServer keyword.
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*/
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void DetectSshHasshServerRegister(void)
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{
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sigmatch_table[DETECT_SSH_HASSH_SERVER].name = KEYWORD_NAME;
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sigmatch_table[DETECT_SSH_HASSH_SERVER].alias = KEYWORD_ALIAS;
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sigmatch_table[DETECT_SSH_HASSH_SERVER].desc = BUFFER_NAME " sticky buffer";
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sigmatch_table[DETECT_SSH_HASSH_SERVER].url = "/rules/" KEYWORD_DOC;
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sigmatch_table[DETECT_SSH_HASSH_SERVER].Setup = DetectSshHasshServerSetup;
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sigmatch_table[DETECT_SSH_HASSH_SERVER].flags |= SIGMATCH_INFO_STICKY_BUFFER | SIGMATCH_NOOPT;
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DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
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GetSshData, ALPROTO_SSH, SshStateBannerDone);
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DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_SSH, SIG_FLAG_TOCLIENT,
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SshStateBannerDone, DetectEngineInspectBufferGeneric, GetSshData);
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DetectBufferTypeSetDescriptionByName(BUFFER_NAME, BUFFER_DESC);
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g_ssh_hassh_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);
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DetectBufferTypeRegisterSetupCallback(BUFFER_NAME, DetectLowerSetupCallback);
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DetectBufferTypeRegisterValidateCallback(BUFFER_NAME, DetectMd5ValidateCallback);
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}
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@ -1,30 +0,0 @@
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/* Copyright (C) 2007-2020 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 Malakhatko Vadym <v.malakhatko@sirinsoftware.com>
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*/
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#ifndef SURICATA_DETECT_SSH_HASSH_SERVER_H
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#define SURICATA_DETECT_SSH_HASSH_SERVER_H
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/* prototypes */
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void DetectSshHasshServerRegister (void);
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#endif /* SURICATA_DETECT_SSH_HASSH_SERVER_H */
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@ -1,144 +0,0 @@
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/* Copyright (C) 2007-2020 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 Vadym Malakhatko <v.malakhatko@sirinsoftware.com>
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*/
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#include "suricata-common.h"
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#include "threads.h"
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#include "decode.h"
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#include "detect.h"
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#include "detect-parse.h"
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#include "detect-content.h"
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#include "detect-engine.h"
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#include "detect-engine-buffer.h"
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#include "detect-engine-mpm.h"
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#include "detect-engine-state.h"
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#include "detect-engine-prefilter.h"
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#include "flow.h"
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#include "flow-var.h"
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#include "flow-util.h"
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#include "util-debug.h"
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#include "util-unittest.h"
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#include "util-unittest-helper.h"
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#include "stream-tcp.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-ssh.h"
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#include "detect-ssh-hassh.h"
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#include "rust.h"
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#define KEYWORD_NAME "ssh.hassh"
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#define KEYWORD_ALIAS "ssh-hassh"
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#define KEYWORD_DOC "ssh-keywords.html#hassh"
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#define BUFFER_NAME "ssh.hassh"
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#define BUFFER_DESC "Ssh Client Fingerprinting For Ssh Clients "
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static int g_ssh_hassh_buffer_id = 0;
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static InspectionBuffer *GetSshData(DetectEngineThreadCtx *det_ctx,
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const DetectEngineTransforms *transforms, Flow *_f,
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const uint8_t flow_flags, void *txv, const int list_id)
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{
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SCEnter();
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InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
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if (buffer->inspect == NULL) {
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const uint8_t *hassh = NULL;
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uint32_t b_len = 0;
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if (SCSshTxGetHassh(txv, &hassh, &b_len, flow_flags) != 1)
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return NULL;
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if (hassh == NULL || b_len == 0) {
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SCLogDebug("SSH hassh not set");
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return NULL;
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}
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InspectionBufferSetupAndApplyTransforms(det_ctx, list_id, buffer, hassh, b_len, transforms);
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}
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return buffer;
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}
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/**
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* \brief this function setup the hassh modifier keyword used in the rule
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*
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* \param de_ctx Pointer to the Detection Engine Context
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* \param s Pointer to the Signature to which the current keyword belongs
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* \param str Should hold an empty string always
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*
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* \retval 0 On success
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* \retval -1 On failure
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* \retval -2 on failure that should be silent after the first
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*/
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static int DetectSshHasshSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
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{
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if (SCDetectBufferSetActiveList(de_ctx, s, g_ssh_hassh_buffer_id) < 0)
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return -1;
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if (SCDetectSignatureSetAppProto(s, ALPROTO_SSH) < 0)
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return -1;
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/* try to enable Hassh */
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SCSshEnableHassh();
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/* Check if Hassh is disabled */
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if (!RunmodeIsUnittests() && !SCSshHasshIsEnabled()) {
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if (!SCSigMatchSilentErrorEnabled(de_ctx, DETECT_SSH_HASSH)) {
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SCLogError("hassh support is not enabled");
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}
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return -2;
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}
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return 0;
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}
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/**
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* \brief Registration function for hassh keyword.
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*/
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void DetectSshHasshRegister(void)
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{
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sigmatch_table[DETECT_SSH_HASSH].name = KEYWORD_NAME;
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sigmatch_table[DETECT_SSH_HASSH].alias = KEYWORD_ALIAS;
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sigmatch_table[DETECT_SSH_HASSH].desc = BUFFER_NAME " sticky buffer";
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sigmatch_table[DETECT_SSH_HASSH].url = "/rules/" KEYWORD_DOC;
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sigmatch_table[DETECT_SSH_HASSH].Setup = DetectSshHasshSetup;
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sigmatch_table[DETECT_SSH_HASSH].flags |= SIGMATCH_INFO_STICKY_BUFFER | SIGMATCH_NOOPT;
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DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,
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GetSshData, ALPROTO_SSH, SshStateBannerDone),
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DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_SSH, SIG_FLAG_TOSERVER,
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SshStateBannerDone, DetectEngineInspectBufferGeneric, GetSshData);
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DetectBufferTypeSetDescriptionByName(BUFFER_NAME, BUFFER_DESC);
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g_ssh_hassh_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);
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DetectBufferTypeRegisterSetupCallback(BUFFER_NAME, DetectLowerSetupCallback);
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DetectBufferTypeRegisterValidateCallback(BUFFER_NAME, DetectMd5ValidateCallback);
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}
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@ -1,30 +0,0 @@
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/* Copyright (C) 2007-2020 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
|
||||
* 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.
|
||||
*
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||||
* 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
|
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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 Malakhatko Vadym <v.malakhatko@sirinsoftware.com>
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*/
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#ifndef SURICATA_DETECT_SSH_HASSH_H
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#define SURICATA_DETECT_SSH_HASSH_H
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/* prototypes */
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void DetectSshHasshRegister (void);
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#endif /* SURICATA_DETECT_SSH_HASSH_H */
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