DavidBuchanan314

"""
31-round sha256 collision.

Not my research, just a PoC script I put together with numbers plugged in from the slide at
https://twitter.com/jedisct1/status/1772647350554464448 from FSE2024

SHA256 impl follows FIPS 180-4
https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf
"""

joonas-fi

package main

import (
	"encoding/binary"
	"hash"
)

// The size of an MD4 checksum in bytes.
const Size = 16

robstewart57

[18:27] <trumanshow19> Would someone mind help iron out the
inconsistencies in my head with respect to purity in
Haskell. Statement 1: Haskell is a purely functional lanugage, S2:
Haskell is not impure, but... S3: f :: a -> a is a "pure" function as
opposed to a -> IO a.

[18:27] <trumanshow19> If a -> is pure, to distinguish a -> IO a, then
how do I describe the latter, is there is no impurity in Haskell ?

[18:28] <trumanshow19> The only opposite of pure I know is impure.