/* Send integrity checking information about a file to the server */
int intcheck_file(const char *file_name, const char *dir)
{
struct stat statbuf;
os_md5 mf_sum;
os_sha1 sf_sum;
char newsum[912 + 1];
newsum[0] = '\0';
newsum[912] = '\0';
/* Stat the file */
#ifdef WIN32
if (stat(file_name, &statbuf) < 0)
#else
if (lstat(file_name, &statbuf) < 0)
#endif
{
snprintf(newsum, 911, "%c:%s:-1 %s%s", SYSCHECK_MQ, SYSCHECK,
dir, file_name);
send_msg(0, newsum);
return (1);
}
/* Generate new checksum */
#ifdef WIN32
if (S_ISREG(statbuf.st_mode))
#else
if (S_ISREG(statbuf.st_mode) || S_ISLNK(statbuf.st_mode))
#endif
{
/* Generate SHA-1 of the file */
if (OS_SHA1_File(file_name, sf_sum, OS_TEXT) < 0) {
strncpy(sf_sum, "xxx", 4);
}
/* Generate MD5 of the file */
if (OS_MD5_File(file_name, mf_sum, OS_TEXT) < 0) {
strncpy(mf_sum, "xxx", 4);
}
}
snprintf(newsum, 911, "%c:%s:%d:%d:%d:%d:%s:%s %s%s",
SYSCHECK_MQ, SYSCHECK,
(int)statbuf.st_size,
(int)statbuf.st_mode,
(int)statbuf.st_uid,
(int)statbuf.st_gid,
mf_sum,
sf_sum, dir, file_name);
send_msg(0, newsum);
return (1);
}
/* make main to compile (after the make md5) * Example of the md5 API use * Daniel B. Cid, [email protected] */ int main(int argc, char ** argv) { os_sha1 filesum; if(argc < 2) usage(argv); if(OS_SHA1_File(argv[1], filesum) == 0) { printf("SHA1Sum for \"%s\" is: %s\n",argv[1],filesum); } else { printf("SHA1Sum for \"%s\" failed\n", argv[1]); } return(0); }
/* Signs a log file */
void OS_SignLog(const char *logfile, const char *logfile_old, int log_missing)
{
os_md5 mf_sum;
os_md5 mf_sum_old;
os_sha1 sf_sum;
os_sha1 sf_sum_old;
char logfilesum[OS_FLSIZE +1];
char logfilesum_old[OS_FLSIZE +1];
FILE *fp;
/* Clearing the memory */
memset(logfilesum, '\0', OS_FLSIZE +1);
memset(logfilesum_old, '\0', OS_FLSIZE +1);
/* Setting the umask */
umask(0027);
/* Creating the checksum file names */
snprintf(logfilesum, OS_FLSIZE, "%s.sum", logfile);
snprintf(logfilesum_old, OS_FLSIZE, "%s.sum", logfile_old);
/* generating md5 of the old file */
if(OS_MD5_File(logfilesum_old, mf_sum_old) < 0)
{
merror("%s: No previous md5 checksum found: '%s'. "
"Starting over.", ARGV0, logfilesum_old);
strncpy(mf_sum_old, "none", 6);
}
/* generating sha1 of the old file. */
if(OS_SHA1_File(logfilesum_old, sf_sum_old) < 0)
{
merror("%s: No previous sha1 checksum found: '%s'. "
"Starting over.", ARGV0, logfilesum_old);
strncpy(sf_sum_old, "none", 6);
}
/* Generating md5 of the current file */
if(OS_MD5_File(logfile, mf_sum) < 0)
{
if(log_missing)
merror("%s: File '%s' not found. MD5 checksum skipped.",
ARGV0, logfile);
strncpy(mf_sum, "none", 6);
}
/* Generating sha1 of the current file */
if(OS_SHA1_File(logfile, sf_sum) < 0)
{
if(log_missing)
merror("%s: File '%s' not found. SHA1 checksum skipped.",
ARGV0, logfile);
strncpy(sf_sum, "none", 6);
}
fp = fopen(logfilesum, "w");
if(!fp)
{
merror(FOPEN_ERROR, ARGV0, logfilesum, errno, strerror(errno));
return;
}
fprintf(fp, "Current checksum:\n");
fprintf(fp, "MD5 (%s) = %s\n", logfile, mf_sum);
fprintf(fp, "SHA1 (%s) = %s\n\n", logfile, sf_sum);
fprintf(fp, "Chained checksum:\n");
fprintf(fp, "MD5 (%s) = %s\n", logfilesum_old, mf_sum_old);
fprintf(fp, "SHA1 (%s) = %s\n\n", logfilesum_old, sf_sum_old);
fclose(fp);
return;
}
