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| author | Christian Heimes <christian@python.org> | 2020-05-27 19:50:06 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-27 19:50:06 (GMT) |
| commit | db5aed931f8a617f7b63e773f62db468fe9c5ca1 (patch) | |
| tree | 64a2a3bf0865ac93b92d8361b6d3b51f1123cb0a /Lib/hmac.py | |
| parent | 210a137396979d747c2602eeef46c34fc4955448 (diff) | |
| download | cpython-db5aed931f8a617f7b63e773f62db468fe9c5ca1.zip cpython-db5aed931f8a617f7b63e773f62db468fe9c5ca1.tar.gz cpython-db5aed931f8a617f7b63e773f62db468fe9c5ca1.tar.bz2 | |
bpo-40791: Use CRYPTO_memcmp() for compare_digest (#20456)
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.
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 54a1ef9..180bc37 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)) |