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Posted: **Fri Apr 10, 2020 1:09 am**

Hi all,

Can someone please help me with a short python script/bash script that can generate PBKDF2 hash for qbittorrent?
I can see the code here -- https://github.com/qbittorrent/qBittorr ... ssword.cpp
But I don't know enough C++/crypto to replicate this.

Thanks for the help in advance.

P.S - I am not trying to reset my password, I am trying to make my password reset bit easier. I prefer typing a command rather than edit configuration, restart etc. :-)

Posted: **Fri Mar 03, 2023 7:29 am**

Hi,

Sorry for the necrobump, but for the records I also needed this (for a different reason than OP), so I came up with the following python script to generate hashes suitable for QBittorrent config file:

Code: Select all

import base64
import getpass
import hashlib
import os

# As per https://github.com/qbittorrent/qBittorrent/blob/ce9bdaef5cdb8ab77d71481f20b25c9e6da1b9eb/src/base/utils/password.cpp#L48
ITERATIONS = 100_000

# 4x32 bits words = 16 bytes: https://github.com/qbittorrent/qBittorrent/blob/ce9bdaef5cdb8ab77d71481f20b25c9e6da1b9eb/src/base/utils/password.cpp#L75
SALT_SIZE = 16

# Prompt user for password
password = getpass.getpass()

# Generate a cryptographically secure pseudorandom salt
salt = os.urandom(SALT_SIZE)

# PBKDF2 w/ SHA512 hmac
h = hashlib.pbkdf2_hmac("sha512", password.encode(), salt, ITERATIONS)

# Base64 encode and join salt and hash
print(f"Hash: {base64.b64encode(salt).decode()}:{base64.b64encode(h).decode()}")

To sum it up, it's a standard PBKDF2 with a SHA512 hmac, 100.000 iterations, and a 128bits salt. The salt is base64 encoded as well as the hash, and the two are joined together with the ":" character (probably in an external config serialization step). The resulting string can be used directly in config like so:

Code: Select all

WebUI\Password_PBKDF2="@ByteArray(<hash as returned by the script>)"

so in practice, "password123" coud be (depending on the salt):

Code: Select all

WebUI\Password_PBKDF2="@ByteArray(q+12KDUV69nIdoK92Alh7Q==:HtvIsWsCSN9PnE/gayIruCDeDjnz8TXG+Cw2XUTWs1CJFRXQxyyOyz/FVyU9QtTgEJ9fwxZYJKHaURV42sB0JQ==)"

Hope that'll help someone. Maybe not. Maybe future me

.

Posted: **Tue Apr 18, 2023 12:03 am**

It did help me!

I made an ansible custom filter to configure qBittorrent UI password.

This is the custom filter, just place it under the folder filter_plugins.

Code: Select all

#!/usr/bin/python
import base64
import hashlib
import os

class FilterModule(object):
    def filters(self):
        return {'qbittorrent_passwd': self.qbittorrent_passwd}

    def qbittorrent_passwd(self, plain_passwd):
        # As per https://github.com/qbittorrent/qBittorrent/blob/ce9bdaef5cdb8ab77d71481f20b25c9e6da1b9eb/src/base/utils/password.cpp#L48
        ITERATIONS = 100_000

        # 4x32 bits words = 16 bytes: https://github.com/qbittorrent/qBittorrent/blob/ce9bdaef5cdb8ab77d71481f20b25c9e6da1b9eb/src/base/utils/password.cpp#L75
        SALT_SIZE = 16

        # Generate a cryptographically secure pseudorandom salt
        salt = os.urandom(SALT_SIZE)

        # PBKDF2 w/ SHA512 hmac
        h = hashlib.pbkdf2_hmac("sha512", plain_passwd.encode(), salt, ITERATIONS)

        # Base64 encode and join salt and hash
        return f"@ByteArray({base64.b64encode(salt).decode()}:{base64.b64encode(h).decode()})"

Sample task. Note that qbittorrent_ui_passwd is a variable on ansible hosts file.

Code: Select all

- name: Set qBittorrent 'WebUI\Password_PBKDF2'
  ini_file:
    path: '{{ mount_path }}/config/qBittorrent.conf'
    owner: '{{ 1000 | int }}'
    group: '{{ 1000 | int }}'
    mode: '0664'
    section: Preferences
    option: WebUI\Password_PBKDF2
    value: '{{ qbittorrent_ui_passwd | qbittorrent_passwd }}'

Posted: **Wed May 10, 2023 7:15 am**

qBLover wrote: ↑Fri Apr 10, 2020 1:09 am Hi all,

Can someone please help me with a short python script/bash script that can generate PBKDF2 hash for qbittorrent?
I can see the code here -- https://github.com/qbittorrent/qBittorr ... ssword.cpp
But I don't know enough C++/crypto to replicate this.

Thanks for the help in advance.

P.S - I am not trying to reset my password, I am trying to make my password reset bit easier. I prefer typing a command rather than edit configuration, restart etc. :-)

Thank you,
for sharing such good information, and for lots of love,and amazing things that you have contributed.Fm Whatsapp download

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