ethereum.crypto.hash

Cryptographic Hash Functions.

.. contents:: Table of Contents :backlinks: none :local:

Introduction

Cryptographic hashing functions.

Hash32

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Hash32 = Bytes32

Hash64

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Hash64 = Bytes64

_hashlib_has_keccak

Return True if hashlib can compute pre-NIST Keccak digests.

def _hashlib_has_keccak() -> bool:
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    <snip>
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    try:
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        hashlib.new("keccak-256", b"")
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    except ValueError:
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        return False
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    return True

_USE_HASHLIB

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_USE_HASHLIB = _hashlib_has_keccak()

_keccak256_digest

def _keccak256_digest(​buffer: bytes | bytearray​) -> bytes:
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        return hashlib.new("keccak-256", buffer).digest()

_keccak512_digest

def _keccak512_digest(​buffer: bytes | bytearray​) -> bytes:
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        return hashlib.new("keccak-512", buffer).digest()

_keccak256_digest

def _keccak256_digest(​buffer: bytes | bytearray​) -> bytes:
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        return (
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            _pycryptodome_keccak.new(digest_bits=256).update(buffer).digest()
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        )

_keccak512_digest

def _keccak512_digest(​buffer: bytes | bytearray​) -> bytes:
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        return (
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            _pycryptodome_keccak.new(digest_bits=512).update(buffer).digest()
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        )

keccak256

Computes the keccak256 hash of the input buffer.

Parameters

buffer : Input for the hashing function.

Returns

hash : ethereum.base_types.Hash32 Output of the hash function.

def keccak256(​buffer: bytes | bytearray​) -> Hash32:
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    <snip>
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    return Hash32(
_keccak256_digest
(buffer))

keccak512

Computes the keccak512 hash of the input buffer.

Parameters

buffer : Input for the hashing function.

Returns

hash : ethereum.base_types.Hash32 Output of the hash function.

def keccak512(​buffer: bytes | bytearray​) -> Hash64:
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    <snip>
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    return Hash64(
_keccak512_digest
(buffer))