New submission from Christian Heimes <[email protected]>:
The hashlib module / PEP 452 and OpenSSL use slightly different conventions for
hashing algorithm names. The old and common algorithms like md5 to sha512 use
the same strings (all lower case, no dashes or underscores). But new algorithms
like sha3_512, shake, sha512_256, and blake2 use different conventions.
The inconsistency bloats the list of available algorithms. Also the builtin
OpenSSL constructor does not support Python's preferred names.
>>> import hashlib, _hashlib
>>> sorted(hashlib.algorithms_available)
['blake2b', 'blake2b512', 'blake2s', 'blake2s256', 'md4', 'md5', 'md5-sha1',
'ripemd160', 'sha1', 'sha224', 'sha256', 'sha3-224', 'sha3-256', 'sha3-384',
'sha3-512', 'sha384', 'sha3_224', 'sha3_256', 'sha3_384', 'sha3_512', 'sha512',
'sha512-224', 'sha512-256', 'shake128', 'shake256', 'shake_128', 'shake_256',
'sm3', 'whirlpool']
>>> _hashlib.new("sha3_512")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: unsupported hash type
>>> _hashlib.new("sha3-512")
<sha3-512 HASH object @ 0x7f1387890840>
I propose to normalize names to Python standard names for HASH.name, repr, list
of available algorithms, and for the new() constructor.
----------
assignee: christian.heimes
components: Extension Modules
messages: 352270
nosy: christian.heimes, gregory.p.smith
priority: normal
severity: normal
status: open
title: Normalize hashing algorithm names
type: behavior
versions: Python 3.7, Python 3.8, Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue38153>
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