I assume that permitting digest === null was unintentional when
digest === undefined was deprecated since their behavior was
equivalent. The sha1 default for digest === null has somehow made it
through refactoring of the PBKDF2 module multiple times, even though
digest === undefined has been EOL for some time now.
This change deprecates setting digest to null so we can fix the
behavior in Node.js 12 or so.
PR-URL: https://github.com/nodejs/node/pull/22861
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
19ad6b8f72