int cl_cvdverify(const char *file)
{
FILE *fs;
int ret;
if((fs = fopen(file, "rb")) == NULL) {
cli_errmsg("cl_cvdverify: Can't open file %s\n", file);
return CL_EOPEN;
}
ret = cli_cvdverify(fs, NULL);
fclose(fs);
return ret;
}
int cli_cvdload(FILE *fs, struct cl_engine *engine, unsigned int *signo, unsigned int options, unsigned int dbtype, const char *filename, unsigned int chkonly)
{
struct cl_cvd cvd, dupcvd;
FILE *dupfs;
int ret;
time_t s_time;
int cfd;
struct cli_dbio dbio;
struct cli_dbinfo *dbinfo = NULL;
char *dupname;
dbio.hashctx = NULL;
cli_dbgmsg("in cli_cvdload()\n");
/* verify */
if((ret = cli_cvdverify(fs, &cvd, dbtype)))
return ret;
if(dbtype <= 1) {
/* check for duplicate db */
dupname = cli_strdup(filename);
if(!dupname)
return CL_EMEM;
dupname[strlen(dupname) - 2] = (dbtype == 1 ? 'v' : 'l');
if(!access(dupname, R_OK) && (dupfs = fopen(dupname, "rb"))) {
if((ret = cli_cvdverify(dupfs, &dupcvd, !dbtype))) {
fclose(dupfs);
free(dupname);
return ret;
}
fclose(dupfs);
if(dupcvd.version > cvd.version) {
cli_warnmsg("Detected duplicate databases %s and %s. The %s database is older and will not be loaded, you should manually remove it from the database directory.\n", filename, dupname, filename);
free(dupname);
return CL_SUCCESS;
} else if(dupcvd.version == cvd.version && !dbtype) {
cli_warnmsg("Detected duplicate databases %s and %s, please manually remove one of them\n", filename, dupname);
free(dupname);
return CL_SUCCESS;
}
}
free(dupname);
}
if(strstr(filename, "daily.")) {
time(&s_time);
if(cvd.stime > s_time) {
if(cvd.stime - (unsigned int ) s_time > 3600) {
cli_warnmsg("******************************************************\n");
cli_warnmsg("*** Virus database timestamp in the future! ***\n");
cli_warnmsg("*** Please check the timezone and clock settings ***\n");
cli_warnmsg("******************************************************\n");
}
} else if((unsigned int) s_time - cvd.stime > 604800) {
cli_warnmsg("**************************************************\n");
cli_warnmsg("*** The virus database is older than 7 days! ***\n");
cli_warnmsg("*** Please update it as soon as possible. ***\n");
cli_warnmsg("**************************************************\n");
}
engine->dbversion[0] = cvd.version;
engine->dbversion[1] = cvd.stime;
}
if(cvd.fl > cl_retflevel()) {
cli_warnmsg("***********************************************************\n");
cli_warnmsg("*** This version of the ClamAV engine is outdated. ***\n");
cli_warnmsg("*** DON'T PANIC! Read http://www.clamav.net/support/faq ***\n");
cli_warnmsg("***********************************************************\n");
}
cfd = fileno(fs);
dbio.chkonly = 0;
if(dbtype == 2)
ret = cli_tgzload(cfd, engine, signo, options | CL_DB_UNSIGNED, &dbio, NULL);
else
ret = cli_tgzload(cfd, engine, signo, options | CL_DB_OFFICIAL, &dbio, NULL);
if(ret != CL_SUCCESS)
return ret;
dbinfo = engine->dbinfo;
if(!dbinfo || !dbinfo->cvd || (dbinfo->cvd->version != cvd.version) || (dbinfo->cvd->sigs != cvd.sigs) || (dbinfo->cvd->fl != cvd.fl) || (dbinfo->cvd->stime != cvd.stime)) {
cli_errmsg("cli_cvdload: Corrupted CVD header\n");
return CL_EMALFDB;
}
dbinfo = engine->dbinfo ? engine->dbinfo->next : NULL;
if(!dbinfo) {
cli_errmsg("cli_cvdload: dbinfo error\n");
return CL_EMALFDB;
}
dbio.chkonly = chkonly;
if(dbtype == 2)
options |= CL_DB_UNSIGNED;
else
options |= CL_DB_SIGNED | CL_DB_OFFICIAL;
ret = cli_tgzload(cfd, engine, signo, options, &dbio, dbinfo);
while(engine->dbinfo) {
dbinfo = engine->dbinfo;
engine->dbinfo = dbinfo->next;
mpool_free(engine->mempool, dbinfo->name);
mpool_free(engine->mempool, dbinfo->hash);
if(dbinfo->cvd)
cl_cvdfree(dbinfo->cvd);
mpool_free(engine->mempool, dbinfo);
}
return ret;
}
int cli_cvdload(FILE *fs, struct cl_engine **engine, unsigned int *signo, short warn, unsigned int options)
{
char *dir;
struct cl_cvd cvd;
int ret;
time_t s_time;
int cfd;
cli_dbgmsg("in cli_cvdload()\n");
/* verify */
if((ret = cli_cvdverify(fs, &cvd)))
return ret;
if(cvd.stime && warn) {
time(&s_time);
if((int) s_time - cvd.stime > 604800) {
cli_warnmsg("**************************************************\n");
cli_warnmsg("*** The virus database is older than 7 days! ***\n");
cli_warnmsg("*** Please update it as soon as possible. ***\n");
cli_warnmsg("**************************************************\n");
}
}
if(cvd.fl > cl_retflevel()) {
cli_warnmsg("***********************************************************\n");
cli_warnmsg("*** This version of the ClamAV engine is outdated. ***\n");
cli_warnmsg("*** DON'T PANIC! Read http://www.clamav.net/support/faq ***\n");
cli_warnmsg("***********************************************************\n");
}
dir = cli_gentemp(NULL);
if(mkdir(dir, 0700)) {
cli_errmsg("cli_cvdload(): Can't create temporary directory %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
cfd = fileno(fs);
/* use only operations on file descriptors, and not on the FILE* from here on
* if we seek the FILE*, the underlying descriptor may not seek as expected
* (for example on OpenBSD, cygwin, etc.).
* So seek the descriptor directly.
*/
if(lseek(cfd, 512, SEEK_SET) == -1) {
cli_errmsg("cli_cvdload(): lseek(fs, 512, SEEK_SET) failed\n");
return CL_EIO;
}
if(cli_untgz(cfd, dir)) {
cli_errmsg("cli_cvdload(): Can't unpack CVD file.\n");
free(dir);
return CL_ECVDEXTR;
}
/* load extracted directory */
ret = cl_load(dir, engine, signo, options);
cli_rmdirs(dir);
free(dir);
return ret;
}
