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Allow IFAC bitmask generation for large packet sizes

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Mark Qvist 2025-01-11 17:26:51 +01:00
parent 5d677d2fb7
commit 45494f21aa
1 changed files with 1 additions and 1 deletions
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2
RNS/Cryptography/HKDF.py
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@ -48,7 +48,7 @@ def hkdf(length=None, derive_from=None, salt=None, context=None):
derived = b""
for i in range(ceil(length / hash_len)):
block = hmac_sha256(pseudorandom_key, block + context + bytes([i + 1]))
block = hmac_sha256(pseudorandom_key, block + context + bytes([(i + 1)%(0xFF+1)]))
derived += block
return derived[:length]