How to convert from binary to bytes to hex in Python 3? -


i'm trying write program converts 2 hex strings bytes, , bytes binary. once in binary, want perform xor transposition on them. having been accomplished, want convert binary strings bytes, , again hex. know answer should be, it's question of getting b.

the code have far follows: 

input1 = "1c0111001f010100061a024b53535009181c" input2 = "686974207468652062756c6c277320657965"  target = "746865206b696420646f6e277420706c6179"  d = conversions.hexconvert(input1) e = conversions.hexconvert(input2)  print(d) print(e)  f = bitstring.bitarray(d) g = bitstring.bitarray(e)  xor1 = f.bin xor2 = g.bin  print("xor1 is", xor1) print("xor2 is", xor2)  xor1, xor2 = xor2, xor1  print("xor1 now:", xor1)

the function "hexconvert" comprised of following code: 

import codecs  def hexconvert(input):     output = codecs.decode(input, 'hex')     return(output)

my code spitting out following: 

b'\x1c\x01\x11\x00\x1f\x01\x01\x00\x06\x1a\x02kssp\t\x18\x1c' b"hit bull's eye" xor1    : 000111000000000100010001000000000001111100000001000000010000000000000110000110100000001001001011010100110101001101010000000010010001100000011100 xor2    : 011010000110100101110100001000000111010001101000011001010010000001100010011101010110110001101100001001110111001100100000011001010111100101100101 xor1 now: 011010000110100101110100001000000111010001101000011001010010000001100010011101010110110001101100001001110111001100100000011001010111100101100101

all far. i'd know can add end of code convert xor1 bytes hex can compare result should be. i've been trying figure out how use struct, binascii, , bitstring, i'm getting nowhere. , suggestions appreciated.

it great if suggest how make code more efficient.

thanks in advance!

you don't have convert bits here; can xor bytes fine. when iterate on bytes object individual values integers in range 0-255, , can xor those. vice versa, can create new bytes object again sequence of integers.

convert hex bytes binascii.unhexlify(), again binascii.hexlify():

from binascii import hexlify, unhexlify  bytes1, bytes2 = unhexlify(input1), unhexlify(input2) xor_bytes = bytes([b1 ^ b2 b1, b2 in zip(bytes1, bytes2)])  result = hexlify(xor_bytes).decode('ascii')

the decode there convert bytes output of hexlify string.

demo:

>>> binascii import hexlify, unhexlify >>> input1 = "1c0111001f010100061a024b53535009181c" >>> input2 = "686974207468652062756c6c277320657965" >>> bytes1, bytes2 = unhexlify(input1), unhexlify(input2) >>> xor_bytes = bytes([b1 ^ b2 b1, b2 in zip(bytes1, bytes2)]) >>> xor_bytes b"the kid don't play" >>> hexlify(xor_bytes).decode('ascii') '746865206b696420646f6e277420706c6179'

Comments

Post a Comment

Popular posts from this blog

javascript - Jquery show_hide, what to add in order to make the page scroll to the bottom of the hidden field once button is clicked -

i have button on website when clicked, reveals map. button can seen when page first loads up, when clicked, section holding map slides open , goes out of screen since page loads @ top (normal). want page scroll down bottom of div select when button pushed, if map out of screen. if page scrolled down, , clicks show map button, don't want page jump bottom of map. i tried figure out myself, no luck. seasoned jquery coders able give me guidance? many thanks! map = mapdiv.gmap3("get"); infobox = new infobox({ pixeloffset: new google.maps.size(-220, -310), closeboxurl: '', enableeventpropagation: true }); mapdiv.delegate('.infobox .close','click',function () { infobox.close(); }); jquery(".slidingdiv").hide(); jquery(".show_hide").show(); jquery('.show_hide').click(function(){ lastcenter=map.getcenter(); jquery(".slidingdiv...
Read more

python - Django-cities exits with "killed" -

i trying install django-cities on server 500mb ram. whenever run: manage.py cities the system exits saying killed. trying run: manage.py cities --import=country --force worked, guessing matter of running out of memory. to bypass, tried refer package local copy of cities' data file. still didn't work. any ideas on how can migrate data without having increase memory on server? based on suggestion comments, solved setting temporary swap file. if unfamiliar it, can follow these steps: set swap file touch /var/swap.img chmod 600 /var/swap.img set swap file size cd /var dd if=/dev/zero of=/var/swap.img bs=1024k count=1000 this create 1gb swap file. prepare disk image mkswap /var/swap.img activate swap memory swapon /var/swap.img once done, can turn off swap image: swapoff /var/swap.img more information on virtual memory , swap files can found here: https://www.digitalocean.com/community/tutorials/how-to-configure-virtual-me...
Read more

python - How to get a widget position inside it's layout in Kivy? -

i have gridlayout , added image widgets on after adding of images want draw rectangle in each image using canvas couldn't because don't know exact image widgets positions on gridlayout. code: http://paste.ofcode.org/3bdp9yhjrcrzmsztbu9hqp4 http://paste.ofcode.org/3az3gx4fxzr9dlhe2ami97c in last line of python code : rectangle(pos = (child.x - 2.4, child.y + 467), size = (70, 70)) how draw rectangle in child(my method not good^), also why gridlayout not coming in center after setting it's pos_hint = {"center_x" : .5}? if understand question right, try use such methods to_local() , to_parent() , to_widget() , to_window() . try substract position of gridlayout widgets' positions.
Read more