Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Script to get checksum of itself
Top Forums Shell Programming and Scripting Script to get checksum of itself Post 302991317 by rbatte1 on Thursday 9th of February 2017 04:13:46 AM
Old 02-09-2017
If you update the file to insert the correct checksum, then that will change the checksum for the next run. You would be extremely unlikely to ever be able to guess the checksum and be able to put it in the script.

You could consider:-
  • Change the permissions
  • Have the script read a file holding the checksum
  • Use and IDS as zaxxon suggests
  • Regularly checksum your code and compare to the previous run
Of course, all of these can be bypassed by someone with appropriate authority, so it comes down to a question of who is trusted and only granting access to those you can trust. A script that can be read can be copied and adjusted before running the local copy anyway, if the user has the authority to do so, so you should be thinking of denying all access except where you are comfortable granting it.

Making the scripts' permissions as rwx --- --- and having a sudo rule to allow specific people to execute it may be the way to go.


I hope that this gives you some ideas to ponder further.
Robin
Last edited by rbatte1; 02-09-2017 at 05:14 AM.. Reason: Closing message & signature
This User Gave Thanks to rbatte1 For This Post:
SkySmart
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

First time help, please - checksum script...

Hello all! I'm a recent college grad now working for a contractor. I've been tasked with writing a program/script that will verify that something was copied correctly. This is how the system is used - The user will get a distribution tape (a 4mm tape DDS3). On this tape are a bunch of... (6 Replies)
Discussion started by: kapolani
6 Replies

2. Shell Programming and Scripting

Checksum question

in HPUX: I am copying oracle datafiles from one mountpoint to another the total size is about 250Gb. I wanted to perform a checksum on the target and make sure the files came overy properly. Mountpoints: /s01 to /u01 /s02 to /u02 I tried using "SUM" on these mountpoints but its taking... (1 Reply)
Discussion started by: jigarlakhani
1 Replies

3. SCO

checksum

Does anyone know the answer to this? When I run "sum -r" on a file that I've down loaded from the sco website, the 1st set of numbers differs from the checksum on the download page but the 2nd set matches. If I try to install the patch, I get errors. Anyone has an answer? (3 Replies)
Discussion started by: jn5519
3 Replies

4. Solaris

checksum

Anyone can tell me the different between "cksum" and "sum" command on Solaris? I read the man pages but still not get it. And how to display the md5 checksum for a file. Thanks, (1 Reply)
Discussion started by: redstone
1 Replies

5. Shell Programming and Scripting

Extracting the checksum

I wanted a script that can give the checksum of a particular zipped file. Can somebody help me in writing a shell script in getting the checksum of a particular tar file. (1 Reply)
Discussion started by: vkca
1 Replies

6. Shell Programming and Scripting

FTP and Checksum

Hi Guys, Sometimes, I have a problem with transferred files in ftp session. Thats why I want to produce checksum value in my local server and remote server. But I could not find anyway to produce checksum value of transferred files in remote server. Do you have any idea? Thanks, Emre (3 Replies)
Discussion started by: ce_emre21
3 Replies

7. IP Networking

Wireshark UDP checksum bad checksum

Hello I am communicating with two devices using my computer over UDP protocol. The application is running fine. When I monitored the UDP traffic using Wireshark software, I found that there were too many Checksum errors. Please find attached the png file showing this error. I am about to... (0 Replies)
Discussion started by: AustinCann
0 Replies

8. Solaris

MD5 checksum

Hi Guys, I have about MD5 checksum so many times but I can't figure out how to use it. Can someone please show me how to perform an MD5 checksum? Thanks a lot guys. (1 Reply)
Discussion started by: cjashu
1 Replies

9. Shell Programming and Scripting

Needed script to FTP a File and generate a quality checksum file

hi all i want a script to FTP a file and should generate a quality checksum file means when I FTP a file from one server to another server it should generate a QC file which should contain timestamp,no.of records in that file Thanks in advance saikumar (3 Replies)
Discussion started by: hemanthsaikumar
3 Replies

10. UNIX for Beginners Questions & Answers

Need UNIX script to check checksum and dummy file creation.

Hi Folks, I need a UNIX script which will copy files(Table wise) from source directory to destination directory (Under table directory) and also creates 2 additional files after getting copied to destination directory with extension .pdy and .ldy , . pdy file will be zero byte file should get... (4 Replies)
Discussion started by: Nicks1412
4 Replies

LEARN ABOUT SUSE

gnutls_ia_verify_endphase

gnutls_ia_verify_endphase(3)					      gnutls					      gnutls_ia_verify_endphase(3)

NAME

       gnutls_ia_verify_endphase - API function

SYNOPSIS

       #include <gnutls/extra.h>

       int gnutls_ia_verify_endphase(gnutls_session_t session, const char * checksum);

ARGUMENTS

       gnutls_session_t session
		   is a gnutls_session_t structure.

       const char * checksum
		   12-byte checksum data, received from gnutls_ia_recv().

DESCRIPTION

       Verify TLS/IA end phase checksum data.  If verification fails, the GNUTLS_A_INNER_APPLICATION_VERIFICATION alert is sent to the other sie.

       This function is called when gnutls_ia_recv() return GNUTLS_E_WARNING_IA_IPHF_RECEIVED or GNUTLS_E_WARNING_IA_FPHF_RECEIVED.

RETURN VALUE

       Return  0  on  successful  verification,  or  an error code.  If the checksum verification of the end phase message fails, GNUTLS_E_IA_VER-
       IFY_FAILED is returned.

REPORTING BUGS

       Report  bugs  to  <bug-gnutls@gnu.org>.	 GnuTLS  home  page:  http://www.gnu.org/software/gnutls/  General  help   using   GNU	 software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2008 Free Software Foundation.
       Copying	and  distribution  of  this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.

SEE ALSO

       The full documentation for gnutls is maintained as a Texinfo manual.  If the info and gnutls programs are properly installed at your  site,
       the command

	      info gnutls

       should give you access to the complete manual.

gnutls								       2.8.6					      gnutls_ia_verify_endphase(3)
All times are GMT -4. The time now is 10:18 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy