온라인 SHA256 해시 생성기

I am trying to encrypt a file on Linux using OpenSSL. For cipher I want to use SHA256 bit encryption. This is something new to me and I don't have idea from where should I start.

Can anyone help me? How can I implement this? Please help me with steps or documentation that can help me in achieving this.

Thanks in advance.

I'm trying to transform a php code into python language.

the php function calculates the hmac value using sha256 and base64 encoding.

php function:

<?phpdefine('SHOPIFY_APP_SECRET', 'some_key');function verify_webhook($data){$calculated_hmac = base64_encode(hash_hmac('sha256', $data, SHOPIFY_APP_SECRET, true));echo $calculated_hmac;}$data = "some_data";$verified = verify_webhook($data);?>

my python function:

import base64import hmacimport binasciifrom hashlib import sha256API_SECRET_KEY = "some_key"data = "some_data"def verify_webhook():    dig = hmac.new(        API_SECRET_KEY,        msg=data,        digestmod=sha256        ).digest()    calculated_hmac = base64.b64encode(bytes(binascii.hexlify(dig)))    print(calculated_hmac)verify_webhook()

I got different outputs even I have the same key and data. I still don't know what I'm missing here. please help!

python output:

YWM3NjlhMDZjMmViMzdmM2E3YjhiZGY4NjhkNTZhOGZhMDgzZDM4MGM1OTkyZTM4YjA5MDNkMDEwNGEwMzJjMA==

php output:

N7JyAyKocoDx/Opx36nGqAuUKdyGH+ROX+J5AJgQ+/g=

I am load testing an API using Jmeter. The Header of the request has an authentication request which needs me to Base64 the url+Nonce+Unix timestamp and SHA256 the resultant value with a secret key.The above needs to be passed in header along with Nonce and timestamp.

For the above scenario should I create a custom function or use any preprocessor ?

I need to make a python django page where it's possible to upload a file (under 10KB) that would show the Sha256 checksum of it and show how many times this file was uploaded before. There's also a subgoal of making the browser itself calc Sha256.

I already have an idea on how to do it, but I lack the knowledge on details and I'd appreciate if you could point me in the right direction.

I want to create a simple webpage with a form for a file upload. I'd like to make JS intercept the file and calc Sha256 in browser and send it as an additional field in a POST request along with the file itself to a certain URL. Is it even possible to do this thing? Then I'll calculate Sha256 with Python on the server side and compare Sha256's received and if they match I'll increment a field in DB matching this Sha256 by 1. I am also planning on using AJAX so I don't need to reload a page after I upload the file to get the Sha256 value and the number of files uploaded before.

Please if you have suggestions on how it can be done in a good way - let me know. Thanks.

I would like to create a blockchain network which will stay at the same level of complexity, is such a thing possible?

Thanks