chksum

A script to check/verify checksums. Some sites offer a checksum file, while others offer the checksum to copy (as text) to manually compare against - or to create checksum files, like: fooBar.txt.sha256 or: CHECKSUMS.rmd160 (batch).

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Install

Put the script in /usr/local/bin, or any folder of your choice. Just make sure it's in $PATH.

$ cd /path/to/chksum
$ sudo install -v -m755 -o0 -g0 chksum /usr/local/bin

Usage

Verifying:
    chksum <mode <checksum> <file>

Creating checksum files:
    chksum -a <files>
    chksum -o <mode> <files>
    chksum -b <mode> <files>

Modes:
    md5|sha[1|224|256|384|512]|r[ipe]md160|whirlpool
    [!] When creating checksum files... MD5 or SHA[1] are not accepted.

Examples

Success:

$ chksum sha da39a3ee5e6b4b0d3255bfef95601890afd80709 test.txt
test.txt:		... OK

Error:

$ chksum sha da39a3ee5e6b4b0d3255bfef95601890afd80708 test.txt
test.txt:		... FAILED

chksum: WARNING: The checksum (da39a3ee5e6b4b0d3255bfef95601890afd80708) did NOT match

Creating files:

$ chksum -o rmd160 test.txt         // test.txt.rmd160
$ chksum -a test.txt                // test.txt.rmd.160 + test.txt.sha256
$ chksum -b sha256 test_0{1..5}.txt // CHECKSUMS.sha256 with all in 1 file

The text format of the output file is:

da39a3ee5e6b4b0d3255bfef95601890afd80709 */path/to/test.txt

License and Info

gitlab.com/iefdev/chksum

Contributing

1. Fork it (https://gitlab.com/iefdev/chksum/-/forks/new)
2. Create your feature branch (git switch -c feature/fooBar)
3. Commit your changes (git commit -am 'Add some fooBar')
4. Push to the branch (git push origin feature/fooBar)
5. Create a new Merge Request