Online SHA1 Hash Generator

I am familiar with how Git creates SHA1 hashes for files (blobs), but not how they are created for tag objects. I assume they are, if I create an annotated tag, but what is the recipe? And how might I replicate it outside of Git (e.g., in Perl or Python)?

The SHA1 hashes stored in the tree objects (as returned by git ls-tree) do not match the SHA1 hashes of the file content (as returned by sha1sum)

$ git cat-file blob 4716ca912495c805b94a88ef6dc3fb4aff46bf3c | sha1sumde20247992af0f949ae8df4fa9a37e4a03d7063e  -

How does git compute file hashes? Does it compress the content before computing the hash?

I need the ruby equivalent of the following:

openssl x509 -sha1 -fingerprint -noout -in cert.pem

The code that I wrote is:

data = File.read("cert.pem")data["-----BEGIN CERTIFICATE-----\n"]=""data["-----END CERTIFICATE-----\n"]=""OpenSSL::Digest::SHA1.new(Base64.encode64(data))

This code does not generate the same fingerprint as the openssl cli command does.

Any idea what I may be doing wrong?

I want python to read to the EOF so I can get an appropriate hash, whether it is sha1 or md5. Please help. Here is what I have so far:

import hashlibinputFile = raw_input("Enter the name of the file:")openedFile = open(inputFile)readFile = openedFile.read()md5Hash = hashlib.md5(readFile)md5Hashed = md5Hash.hexdigest()sha1Hash = hashlib.sha1(readFile)sha1Hashed = sha1Hash.hexdigest()print "File Name: %s" % inputFileprint "MD5: %r" % md5Hashedprint "SHA1: %r" % sha1Hashed

I have a PostgreSQL database, which have many users. Users' passwords are encrypted in this format:

sha1$678ae$0dd4b5a9588be91a931d1ef1f7e7053477c1478e

This encryption was done with Django (although I don't know if you can encrypt it directly in database).

What I'm trying to do is make a PHP application that can use and validate these users, with those encrypted passwords.

How could I do it?PS: I'm using PHP 7.