Online SHA384 Hash Generator

I've seen this post, and it mentions that Git uses a SHA-1 hash for the version that I am using. However, when I'm comparing the output of git hash-object to the familiar sha1sum, I get different results. For example:

$ git --versiongit version 2.17.1$ git hash-object data/letter.txt2e65efe2a145dda7ee51d1741299f848e5bf752e$ sha1sum data/letter.txt86f7e437faa5a7fce15d1ddcb9eaeaea377667b8  data/letter.txt

I am following this post. The file letter.txt contains a single letter 'a'.

Why would these commands produce different results?

I have run into a strange problem with git and zip files. My build script takes a bunch of documentation html pages and zips them into a docs.zip I then check this file into git.

The problem I am having is that every time I re-run the build script and get a new zip file the new zip file has a different SHA1 than the previous run. My build script is calling the ant zip task. However manualy calling the macOSX zip from the Mac OS X shell gives me a different sha1 if I zip up the same directory twice.

Run 1:

zip foo.zip *openssl sha1 foo.zip rm foo.zip 

Run 2:

zip foo.zip *openssl sha1 foo.zip

Run 1 and run2 give different SHA1 even though the content did not change between runs. In both cases zip prints out exactly the same files being zipped it does not indicate that any OS specific files like .DS_Store are being included in the zip file.

Is the zip algoritm deterministic? If run on the same content will it produce exactly the same bits? if not why not?

What are my choices for zipping the files in a deterministic way? There are thousands of them in the zipped up file, I don't expect those files to change much. I know that git will zip up any files you checkin but the motivation to zip them is to just keep the mass of them out of the way.

I tryna to go on the payment gatway page on secure ogone. And for be well loged as customers, i need to send a post request with all parameters. In this parameters i have to enter the shasign who is a unic code for every transaction.i'm tryna to get the SHAsign , with hashlib. it's a SHA1. Does I need to know the pass phrase ? or i get it without. Thanks. SECURE OGONE / INGENICO.https://payment-services.ingenico.com/ogone/support/~/media/kdb/integration%20guides/sha-in_params_24092019.ashx?la=en

I tried to connect DSA with sha256 in C# and have an error. (SHA1 algorithm hash size is 20 bytes)Can someone tell me whether DSA works with SHA256 or not?

I'm trying use this code for generation pem signature but i cant find similar methods in php to realization this. I have tried all similar methods in PHP but the results do not meet the requirements.

var bytes = Encoding.UTF8.GetBytes("/articles")    .Concat(new byte[] { 0x00 })    .Concat(Encoding.UTF8.GetBytes("get"))    .Concat(new byte[] { 0x00 })    .Concat(Encoding.UTF8.GetBytes("Accept-Language en-en Authorization Agent 0505"))    .Concat(new byte[] { 0x00 });    File.WriteAllBytes("digest.txt", bytes.ToArray());    openssl dgst -sha1 -sign private.pem digest.txt > signature.txt            var signatureInBytes = File.ReadAllBytes("signature.txt");            var signatureInBase64 = Convert.ToBase64String(signatureInBytes);

Are there any suggestions?