litehash 0.2.2

Fast coarse hashes from files

# Install

$ pip3 install litehash

Use

Fibonacci

Calculate the checksum based on the bytes located at an increasing distance from each other, and the file size. We will read more bytes from the file header than from the body.

from pathlib import Path
from litehash import file_to_hash_fibonacci

print(file_to_hash_fibonacci(Path('/path/to/file.dat')))

Equidistant

Calculate the checksum based on ten equidistant bytes, and the file size. The very first and the very last byte of the file will be among the ten read.

from pathlib import Path
from litehash import file_to_hash_equidistant 

print(file_to_hash_equidistant(Path('/path/to/file.dat'), n=10))

HashAlgo

The optional HashAlgo argument allows you to select a hashing algorithm.

By default, MD5 is used as a compromise between speed and size.

Algorithm	Digest Size (bytes)
HashAlgo.crc32	4
HashAlgo.md5	24
HashAlgo.sha256	32

from pathlib import Path
from litehash import file_to_hash_fibonacci, HashAlgo

print(file_to_hash_fibonacci(Path('/path/to/file.dat'), algo=HashAlgo.crc32))