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HDKF and PBKDF2 return an empty string when length is zero #49048

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HDKF and PBKDF2 return an empty string when length is zero #49048

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Commits on Nov 8, 2024

  1. HDKF and PBKDF2 return an empty string when length is zero 

    The PR#380 [1] changed the PBKDF2 deriveBits operation to allow
zero length and introduced an additional step to return an empty
string in that case. It also reversted the PR#275 [2] so that
HKDF also handles the zero length in the same way.

This PR updates the tests cases affecting this 2 algorithms on
the cases where zero was passed in the length parameter.

[1] w3c/webcrypto#380
[2] w3c/webcrypto#275
    @javifernandez
    javifernandez committed Nov 8, 2024
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