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| author | Christian Heimes <christian@python.org> | 2020-05-28 14:09:38 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-28 05:09:38 -0700 |
| commit | 8183e11d87388e4e44e3242c42085b87a878f781 (patch) | |
| tree | 0b0302ad36f4a4b67a64eb68dc5b280ce84f90f7 /Lib/hmac.py | |
| parent | d23ee5d652ba69a32504dac43131be782b6afdc7 (diff) | |
| download | cpython-git-8183e11d87388e4e44e3242c42085b87a878f781.tar.gz | |
[3.9] bpo-40791: Use CRYPTO_memcmp() for compare_digest (GH-20456) (GH-20461)
hashlib.compare_digest uses OpenSSL's CRYPTO_memcmp() function
when OpenSSL is available.
Note: The _operator module is a builtin module. I don't want to add
libcrypto dependency to libpython. Therefore I duplicated the wrapper
function and added a copy to _hashopenssl.c..
(cherry picked from commit db5aed931f8a617f7b63e773f62db468fe9c5ca1)
Co-authored-by: Christian Heimes <christian@python.org>
Diffstat (limited to 'Lib/hmac.py')
| -rw-r--r-- | Lib/hmac.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/hmac.py b/Lib/hmac.py index 54a1ef9bdb..180bc378b5 100644 --- a/Lib/hmac.py +++ b/Lib/hmac.py @@ -4,14 +4,15 @@ Implements the HMAC algorithm as described by RFC 2104. """ import warnings as _warnings -from _operator import _compare_digest as compare_digest try: import _hashlib as _hashopenssl except ImportError: _hashopenssl = None _openssl_md_meths = None + from _operator import _compare_digest as compare_digest else: _openssl_md_meths = frozenset(_hashopenssl.openssl_md_meth_names) + compare_digest = _hashopenssl.compare_digest import hashlib as _hashlib trans_5C = bytes((x ^ 0x5C) for x in range(256)) |