How can i get md5sum for all files inside zip without extracting

Is there any way to get md5sum for all/anyone file inside zip without extracting the zip?

I can extract needed files using unzip <.zip>

But i need to get md5sum without extracting the zip.

Solution

This may not be exactly what you are looking for but it will get you closer. You wouldn't be extracting the entire zip but extracting a file to pipe it to md5sum to get checksum. Without reading the contents of the file, md5sum won't be able to generate a hash.

Let's say you have 3 files with this MD5:

b1946ac92492d2347c6235b4d2611184  a.txt
591785b794601e212b260e25925636fd  b.txt
6f5902ac237024bdd0c176cb93063dc4  c.txt

You zip them into a single file using zip final.zip a.txt b.txt c.txt

When you list the files, you see there are 3 files.

unzip -l final.zip
Archive:  final.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
        6  2021-08-08 17:20   a.txt
        6  2021-08-08 17:20   b.txt
       12  2021-08-08 17:20   c.txt
---------                     -------
       24                     3 files

To get MD5 of each of the files without extracting the entire zip, you can do this:

unzip -p final.zip a.txt | md5sum
b1946ac92492d2347c6235b4d2611184  -

unzip -p final.zip b.txt | md5sum
591785b794601e212b260e25925636fd  -

unzip -p final.zip c.txt | md5sum
6f5902ac237024bdd0c176cb93063dc4  -

Alternative

You can do md5sum *.txt > checksums to get hash of all files and store them in a checksums file. Add that to the zip so you know the md5 of each of the file when the files were added to zipped.