[3.9] bpo-40791: Use CRYPTO_memcmp() for compare_digest (GH-20456) #20461
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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 db5aed9) Co-authored-by: Christian Heimes <christian@python.org>
bedevere-bot added type-feature 
gpshead approved these changes May 27, 2020
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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 db5aed9)
Co-authored-by: Christian Heimes christian@python.org
https://bugs.python.org/issue40791
Automerge-Triggered-By: @tiran