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hashlib has two new constant attributes: algorithms_guaranteed and

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algorithms_avaiable that respectively list the names of hash algorithms
guaranteed to exist in all Python implementations and the names of hash
algorithms available in the current process.

Renames the attribute new in 3.2a0 'algorithms' to 'algorithms_guaranteed'.
This commit is contained in:
Gregory P. Smith 2010-09-06 08:30:23 +00:00
parent c86adb4c5c
commit 13b55291ac
5 changed files with 111 additions and 18 deletions
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17
Lib/hashlib.py
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@ -1,6 +1,4 @@
# $Id$
#
# Copyright (C) 2005-2007 Gregory P. Smith (greg@krypto.org)
# Copyright (C) 2005-2010 Gregory P. Smith (greg@krypto.org)
# Licensed to PSF under a Contributor Agreement.
#
@ -15,8 +13,9 @@ than using new(name):
md5(), sha1(), sha224(), sha256(), sha384(), and sha512()
More algorithms may be available on your platform but the above are
guaranteed to exist.
More algorithms may be available on your platform but the above are guaranteed
to exist. See the algorithms_guaranteed and algorithms_available attributes
to find out what algorithm names can be passed to new().
NOTE: If you want the adler32 or crc32 hash functions they are available in
the zlib module.
@ -57,9 +56,11 @@ More condensed:
# always available algorithm is added.
__always_supported = ('md5', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512')
algorithms = __always_supported
algorithms_guaranteed = __always_supported
algorithms_available = frozenset(__always_supported)
__all__ = __always_supported + ('new', 'algorithms')
__all__ = __always_supported + ('new', 'algorithms_guaranteed',
'algorithms_available')
def __get_builtin_constructor(name):
@ -124,6 +125,8 @@ try:
import _hashlib
new = __hash_new
__get_hash = __get_openssl_constructor
algorithms_available = algorithms_available.union(
_hashlib.openssl_md_meth_names)
except ImportError:
new = __py_new
__get_hash = __get_builtin_constructor