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Fixed invalid check for None

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This commit is contained in:
Mark Qvist 2022-11-25 00:42:22 +01:00
parent e28dbd4afa
commit d5e0a461cf
1 changed files with 2 additions and 2 deletions
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4
RNS/Cryptography/HKDF.py
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@ -33,7 +33,7 @@ def hkdf(length=None, derive_from=None, salt=None, context=None):
if length == None or length < 1:
raise ValueError("Invalid output key length")
if derive_from == "None" or derive_from == "":
if derive_from == None or derive_from == "":
raise ValueError("Cannot derive key from empty input material")
if salt == None or len(salt) == 0:
@ -54,4 +54,4 @@ def hkdf(length=None, derive_from=None, salt=None, context=None):
block = hmac_sha256(pseudorandom_key, block + context + bytes([i + 1]))
derived += block
return derived[:length]
return derived[:length]