detect-file-data.c

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/* Copyright (C) 2007-2022 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 Giuseppe Longo <giuseppelng@gmail.com>
 * \author Victor Julien <victor@inliniac.net>
 *
 */
 
#ifdef UNITTESTS
 
#include "../stream-tcp.h"
#include "../detect.h"
#include "../detect-isdataat.h"
 
static int DetectEngineSMTPFiledataTest02(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NOT(de_ctx);
    de_ctx->flags |= DE_QUIET;
 
    Signature *s = DetectEngineAppendSig(de_ctx, "alert smtp any any -> any any "
                                                 "(msg:\"file_data smtp test\"; "
                                                 "file_data; content:\"message\"; sid:1;)");
    FAIL_IF_NULL(s);
 
    FAIL_IF_NOT(s->flags & SIG_FLAG_TOSERVER);
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
static int DetectFiledataParseTest01(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
    Signature *s =
            DetectEngineAppendSig(de_ctx, "alert smtp any any -> any any "
                                          "(msg:\"test\"; file_data; content:\"abc\"; sid:1;)");
    FAIL_IF_NULL(s);
    FAIL_IF_NOT_NULL(s->sm_lists[DETECT_SM_LIST_PMATCH]);
    FAIL_IF_NULL(s->sm_lists[g_file_data_buffer_id]);
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
static int DetectFiledataParseTest02(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
    Signature *s =
            DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
                                          "(msg:\"test\"; file_data; content:\"abc\"; sid:1;)");
    FAIL_IF_NULL(s);
    FAIL_IF_NOT_NULL(s->sm_lists[DETECT_SM_LIST_PMATCH]);
    FAIL_IF_NULL(s->sm_lists[g_file_data_buffer_id]);
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
static int DetectFiledataParseTest03(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
    Signature *s = DetectEngineAppendSig(de_ctx,
            "alert tcp any any -> any 25 "
            "(msg:\"test\"; flow:to_server,established; file_data; content:\"abc\"; sid:1;)");
    FAIL_IF_NULL(s);
    FAIL_IF_NOT_NULL(s->sm_lists[DETECT_SM_LIST_PMATCH]);
    FAIL_IF_NULL(s->sm_lists[g_file_data_buffer_id]);
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
/**
 * \test Test the file_data fails with flow:to_server.
 */
static int DetectFiledataParseTest04(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
    Signature *s = DetectEngineAppendSig(de_ctx,
            "alert smtp any any -> any any "
            "(msg:\"test\"; flow:to_client,established; file_data; content:\"abc\"; sid:1;)");
    FAIL_IF_NOT_NULL(s);
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
static int DetectFiledataIsdataatParseTest1(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
 
    Signature *s = DetectEngineAppendSig(de_ctx,
            "alert tcp any any -> any any ("
            "file_data; content:\"one\"; "
            "isdataat:!4,relative; sid:1;)");
    FAIL_IF_NULL(s);
 
    SigMatch *sm = s->init_data->smlists[g_file_data_buffer_id];
    FAIL_IF_NULL(sm);
    FAIL_IF_NOT(sm->type == DETECT_CONTENT);
    sm = sm->next;
    FAIL_IF_NULL(sm);
    FAIL_IF_NOT(sm->type == DETECT_ISDATAAT);
 
    DetectIsdataatData *data = (DetectIsdataatData *)sm->ctx;
    FAIL_IF_NOT(data->flags & ISDATAAT_RELATIVE);
    FAIL_IF_NOT(data->flags & ISDATAAT_NEGATED);
    FAIL_IF(data->flags & ISDATAAT_RAWBYTES);
 
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
static int DetectFiledataIsdataatParseTest2(void)
{
    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    FAIL_IF_NULL(de_ctx);
    de_ctx->flags |= DE_QUIET;
 
    Signature *s = DetectEngineAppendSig(de_ctx,
            "alert tcp any any -> any any ("
            "file_data; "
            "isdataat:!4,relative; sid:1;)");
    FAIL_IF_NULL(s);
 
    SigMatch *sm = s->init_data->smlists_tail[g_file_data_buffer_id];
    FAIL_IF_NULL(sm);
    FAIL_IF_NOT(sm->type == DETECT_ISDATAAT);
 
    DetectIsdataatData *data = (DetectIsdataatData *)sm->ctx;
    FAIL_IF_NOT(data->flags & ISDATAAT_RELATIVE);
    FAIL_IF_NOT(data->flags & ISDATAAT_NEGATED);
    FAIL_IF(data->flags & ISDATAAT_RAWBYTES);
 
    DetectEngineCtxFree(de_ctx);
    PASS;
}
 
void DetectFiledataRegisterTests(void)
{
    UtRegisterTest("DetectEngineSMTPFiledataTest02",
                   DetectEngineSMTPFiledataTest02);
 
    UtRegisterTest("DetectFiledataParseTest01", DetectFiledataParseTest01);
    UtRegisterTest("DetectFiledataParseTest02", DetectFiledataParseTest02);
    UtRegisterTest("DetectFiledataParseTest03", DetectFiledataParseTest03);
    UtRegisterTest("DetectFiledataParseTest04", DetectFiledataParseTest04);
 
    UtRegisterTest("DetectFiledataIsdataatParseTest1",
            DetectFiledataIsdataatParseTest1);
    UtRegisterTest("DetectFiledataIsdataatParseTest2",
            DetectFiledataIsdataatParseTest2);
}
 
#endif