ohaval

/*
This program receives the accurate string of the username (as written by `net user`)
and log offs the session associated with that user, if any is active.

In order to log off another users on the system, Administrator permissions
are required. Thus, the program should be run as an Administrator.

Flow of the code is:
1) Enumerate active sessions
2) For each session, enumerate the username string associated with the session

ohaval

"""A small program that log off a user (possibly in another session) in Windows

This is actually an implementation in Python of the `LogoffUser.cpp` program I have made.
I made that program in order to automate the manual operation of logging off my family
user in the workstation each time after they have used it :)

LogoffUser.cpp link: https://gist.github.com/ohaval/a922fc07f4585b81c119614e852d9dbd

Make sure that the `pywin32` packages is installed before using

ohaval

/*
I wanted to play with the clipboard via Windows API so I wrote a small program that
checks if the clipboard contains an image, and if so saves the image as a .bmp file.

This program obtains the handle on the clipboard data, put together all of the
information and raw data a .bmp file holds, and writes it to the disk.

With small changes it's possible to make this code run in a loop and save an image
from the clipboard every X seconds.

ohaval

from typing import List, Tuple


def quick_sort(lst: List[int]) -> List[int]:
    """The Quicksort algorithm.

    Wikipedia: https://en.wikipedia.org/wiki/Quicksort
    """
    if len(lst) < 2:
        return lst

ohaval

from typing import List


def bubble_sort(lst: List[int]) -> None:
    """The Bubble sort algorithm.

    The sorted list is placed in place.
    Wikipedia: https://en.wikipedia.org/wiki/Bubble_sort
    """
    for i in range(len(lst) - 1, 0, -1):

ohaval

from typing import List


def merge_sort(lst: List[int]) -> List[int]:
    """The Merge sort algorithm.

    Wikipedia: https://en.wikipedia.org/wiki/Merge_sort
    """
    if len(lst) <= 1:
        return lst

ohaval

from typing import List


def insertion_sort(lst: List[int]) -> None:
    """The Insertion sort algorithm.
    
    The sorted list is placed in place.
    Wikipedia: https://en.wikipedia.org/wiki/Insertion_sort
    """
    for i in range(1, len(lst)):

ohaval

from typing import List


def selection_sort(lst: List[int]) -> None:
    """The Selection sort algorithm.
    
    The sorted list is placed in place.
    Wikipedia: https://en.wikipedia.org/wiki/Selection_sort
    """
    for i in range(len(lst) - 1):

ohaval

from typing import List


def cycle_sort(lst: List[int]) -> None:
    """The Cycle sort algorithm.

    The sorted list is placed in place.
    Wikipedia: https://en.wikipedia.org/wiki/Cycle_sort
    """
    for i in range(len(lst) - 1):

ohaval

"""This example shows how easy it is to generate and export ECDSA keys with python.

This program is similar to `ssh-keygen -t ecdsa` with no passphrase.
To export the private key with a passphrase, read paramiko.pkey.PKey._write_private_key method.
"""

import paramiko
from cryptography.hazmat.primitives.serialization import (
    Encoding, PrivateFormat, PublicFormat, NoEncryption
)