memset(cleartext, '\0', OS_MAXSTR +1);
memset(buffer, '\0', OS_MAXSTR +1);
memset(file, '\0', OS_SIZE_1024 +1);
memset(file_sum, '\0', 34);
memset(cleartext, '\0', OS_MAXSTR +1);
memset(buffer, '\0', OS_MAXSTR +1);
memset(file, '\0', OS_SIZE_1024 +1);
memset(file_sum, '\0', 34);