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/*
* Fuzz target for cl_load()
*
* Copyright (C) 2018-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
* Authors: Micah Snyder
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include "clamav.h"
void clamav_message_callback(enum cl_msg severity, const char* fullmsg,
const char* msg, void* context)
{
}
class ClamAVState
{
public:
ClamAVState()
{
// Silence all the log messages, none of them are meaningful.
cl_set_clcb_msg(clamav_message_callback);
cl_init(CL_INIT_DEFAULT);
}
~ClamAVState()
{
}
};
// Global with static initializer to setup an engine so we don't need to do
// that on each execution.
ClamAVState kClamAVState;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
cl_error_t ret;
char tmp_file_name[200] = {0};
unsigned int sigs = 0;
FILE* fuzzdb = NULL;
struct cl_engine* engine = NULL;
unsigned int dboptions;
__pid_t pid = getpid();
dboptions =
CL_DB_PHISHING | CL_DB_PHISHING_URLS |
CL_DB_BYTECODE | CL_DB_PUA | CL_DB_ENHANCED;
#if defined(CLAMAV_FUZZ_CDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.cdb", pid);
#elif defined(CLAMAV_FUZZ_CFG)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.cfg", pid);
#elif defined(CLAMAV_FUZZ_CRB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.crb", pid);
#elif defined(CLAMAV_FUZZ_FP)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.fp", pid);
#elif defined(CLAMAV_FUZZ_FTM)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ftm", pid);
#elif defined(CLAMAV_FUZZ_HDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.hdb", pid);
#elif defined(CLAMAV_FUZZ_HSB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.hsb", pid);
#elif defined(CLAMAV_FUZZ_IDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.idb", pid);
#elif defined(CLAMAV_FUZZ_IGN)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ign", pid);
#elif defined(CLAMAV_FUZZ_IGN2)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ign2", pid);
#elif defined(CLAMAV_FUZZ_LDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ldb", pid);
#elif defined(CLAMAV_FUZZ_MDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.mdb", pid);
#elif defined(CLAMAV_FUZZ_MSB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.msb", pid);
#elif defined(CLAMAV_FUZZ_NDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ndb", pid);
#elif defined(CLAMAV_FUZZ_PDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.pdb", pid);
#elif defined(CLAMAV_FUZZ_WDB)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.wdb", pid);
#elif defined(CLAMAV_FUZZ_YARA)
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.yara", pid);
#else
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d", pid);
#endif
fuzzdb = fopen(tmp_file_name, "w");
fwrite(data, size, 1, fuzzdb);
fclose(fuzzdb);
/* need new engine each time. can't add sigs to compiled engine */
engine = cl_engine_new();
/* load the fuzzer-generated sig db */
if (CL_SUCCESS != (ret = cl_load(tmp_file_name,
engine,
&sigs,
dboptions))) {
printf("cl_load: %s\n", cl_strerror(ret));
goto done;
}
/* build engine */
if (CL_SUCCESS != (ret = cl_engine_compile(engine))) {
printf("cl_engine_compile: %s\n", cl_strerror(ret));
goto done;
}
done:
/* Clean up for the next round */
if (NULL != engine) {
cl_engine_free(engine);
}
unlink(tmp_file_name);
return 0;
}
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