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[3.13] Clarify that dklen is expected in bytes for the hashlib functions (GH-106624) #119383

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May 22, 2024
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[3.13] Clarify that dklen is expected in bytes for the hashlib functions (GH-106624) #119383

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4 changes: 2 additions & 2 deletions Doc/library/hashlib.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -328,7 +328,7 @@ include a `salt <https://en.wikipedia.org/wiki/Salt_%28cryptography%29>`_.
your application, read *Appendix A.2.2* of NIST-SP-800-132_. The answers
on the `stackexchange pbkdf2 iterations question`_ explain in detail.

*dklen* is the length of the derived key. If *dklen* is ``None`` then the
*dklen* is the length of the derived key in bytes. If *dklen* is ``None`` then the
digest size of the hash algorithm *hash_name* is used, e.g. 64 for SHA-512.

>>> from hashlib import pbkdf2_hmac
Expand Down Expand Up @@ -357,7 +357,7 @@ include a `salt <https://en.wikipedia.org/wiki/Salt_%28cryptography%29>`_.

*n* is the CPU/Memory cost factor, *r* the block size, *p* parallelization
factor and *maxmem* limits memory (OpenSSL 1.1.0 defaults to 32 MiB).
*dklen* is the length of the derived key.
*dklen* is the length of the derived key in bytes.

.. versionadded:: 3.6

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