Online SHA256 Hash Generator

According to the Bitstamp API docs here https://www.bitstamp.net/api/ the following Python code may be used to generate a SHA256 signature:

import hmacimport hashlibmessage = nonce + customer_id + api_keysignature = hmac.new(    API_SECRET,    msg=message,    digestmod=hashlib.sha256).hexdigest().upper()

I'm trying to use Laravel/PHP with the GuzzleHttp Client to do the same. My code is:

$client  = new \GuzzleHttp\Client();        $nonce = time();        $message = $nonce . $bitstamp_customer_id . $bitstamp_api_key;        $signature = strtoupper(hash_hmac("sha256", $message, $bitstamp_api_secret));$response = $client->request('POST', 'https://www.bitstamp.net/api/v2/balance/', [            'form_params' => [                'key' => $bitstamp_api_key,                'signature' => $signature,                'nonce' => $nonce,            ]        ]);

No matter what I try I get:

Client error:POST https://www.bitstamp.net/api/v2/balance/resulted in a403 Authentication Failedresponse: {"status": "error", "reason": "API key not found", "code": "API0001"}

I've checked the three critical Bitstamp parameters and recreated the API key multiple times. The three parameters which I have doulble checked are:

• bitstamp_customer_id
• bitstamp_api_key
• bitstamp_api_secret

I'm concluding I'm not translating the Python code correctly and would like some help.

I am trying to bruteforce a SHA256 using Python2 , and when I run the script I get a ValueError:

ValueError: chr() arg not in range(256)

My Code

from hashlib import sha256import osdef encrypt(pt):    state = 47    ### ...ct = "868c017b7bef15e04ccc5f2d6b4c372fdff881080155".decode('hex')pt = 'FLAG{'while len(pt) < len(ct):    c = chr(32)    while encrypt(pt) != ct[:len(pt) + 1]:        c = chr(ord(c) + 1)    pt += c    print(pt)        

Output :

Traceback (most recent call last):  File "sls.py", line 13, in <module>    c = chr(ord(c) + 1)ValueError: chr() arg not in range(256)

Where am I bugging ?

My problem is that the newer versions of OpenSSL aren't compatible with default settings of CryptoJS.

The default hash used by openssl enc for password-based key derivation changed in 1.1.0 to SHA256 versus MD5 in lower versions. https://unix.stackexchange.com/questions/344150/why-can-one-box-decrypt-a-file-with-openssl-but-another-one-cant/344586#344586

By default, CryptoJS uses MD5 for its key derivation. OpenSSL used MD5, but now in OpenSSL versions >=1.1.0 it's using SHA256.

So if I pass -md md5 to OpenSSL, CryptoJS is compatible:

echo "Hello World" | openssl enc -aes-256-cbc -md md5 -pass pass:"Secret Passphrase" -e -base64

output: U2FsdGVkX19aufvaqQQ89scaApBos6oFCyqPj7IKUFk=

CryptoJS:

CryptoJS.AES.decrypt('U2FsdGVkX19aufvaqQQ89scaApBos6oFCyqPj7IKUFk=', 'Secret Passphrase').toString(CryptoJS.enc.Utf8);

output: "Hello World"

But now if I want to use SHA256 instead of MD5 (removing the -md md5):

echo "Hello World" | openssl enc -aes-256-cbc -pass pass:"Secret Passphrase" -e -base64

output: U2FsdGVkX1/5LLkFkTpawh1im4a/fCco5hS42cjn/fg=

CryptoJS:

CryptoJS.AES.decrypt('U2FsdGVkX1/5LLkFkTpawh1im4a/fCco5hS42cjn/fg=', 'Secret Passphrase').toString(CryptoJS.enc.Utf8);

output: null

How do I tell CryptoJS to use SHA256 instead of MD5 for its key derivation?

I have the md5 and sha256 hash of a file, I would like to calculate the size of the file from the hash value.

Is there any way to get the size of a file with md5 or sha256 hash of that file available with us ?

When hashing a string, like a password, with sha256, is there a limit to the length of the string I am hashing? For example, is it only "safe" to hash strings that are <= 64 characters?