smartbytes 1.4

makes bytes in Python significantly less painful

About

smartbytes makes byte parsing not painful

*insert I can't believe it's not Python 2! on image*

Installation

PyPi

# pip3 install smartbytes

Manual

The only requirement for smartbytes is any version of python3.

$ git clone https://github.com/Arinerron/smartbytes.git
$ cd smartbytes

# sudo python3 setup.py install

Documentation

Coming soon.

Examples

tl;dr smartbytes makes it so that

• you can use normal string functions on bytes
• packing and unpacking is easy
• it is trivial to encode/decode in hex
• you can parse bytes in chunks rather than one byte at a time

>>> from smartbytes import *

>>> smartbytes('hello world')
b'hello world'

>>> smartbytes('hello') + smartbytes(' world')
b'hello world'

>>> smartbytes('hello') + 0x20 + smartbytes('world')
b'hello world'

>>> smartbytes('hello') + ' ' + b'world'
b'hello world'

>>> smartbytes(0x41) + 'A' + b'A' + 0x41
b'AAAA'

>>> with open('/usr/lib/libc-2.31.so', 'rb') as f:
...     contents = f.read()
... 
>>> smartbytes(contents)['/bin/sh\x00'] # find offset of /bin/sh string in libc
1618243

>>> smartbytes(range(10))
b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t'

>>> smartbytes(range(10)) + range(10)
b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\x00\x01\x02\x03\x04\x05\x06\x07\x08\t'

>>> str(smartbytes(range(10)))
'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t'

>>> smartbytes([(2,3),4],[5,(((3,5),),)])
b'\x02\x03\x04\x05\x03\x05'

>>> smartbytes(range(20)).hex()
b'000102030405060708090a0b0c0d0e0f10111213'

>>> print(smartbytes(range(20)).hexdump())
00 01 02 03 04 05 06 07
08 09 0a 0b 0c 0d 0e 0f
10 11 12 13 

>>> p8(0x12)
b'\x12'

>>> p16(0x34)
b'\x004'

>>> p32(0x1234)
b'\x00\x00\x124'

>>> p64(0x1234)
b'\x00\x00\x00\x00\x00\x00\x124'

>>> p(0x12345)
b'\x01#E'

>>> p(0x1234567890)
b'\x124Vx\x90'

smartbytes also works with pwntools!

>>> from smartbytes import *
>>> from pwn import *
>>> p = process('cat')
[x] Starting local process '/usr/bin/cat'
[+] Starting local process '/usr/bin/cat': pid 1470268
>>> line = smartbytes(b'robert', 0x20, 'is') + 0x20 + b'an' + smartbytes(' ', 'arch', 0x20, 'user btw')
>>> line
b'robert is an arch user btw'
>>> p.sendline(line)