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Specify big-endian counter bytes

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Rafael Moraes
2026-02-08 13:31:02 -03:00
parent 2857015ae9
commit 923d8f22b0
1 changed files with 3 additions and 3 deletions
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votify/totp.py
+3 -3
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@@ -14,13 +14,13 @@ class TOTP:
@staticmethod
def derive(ciphertext: Collection[int]) -> bytes:
return ''.join(
return "".join(
str(byte ^ ((i % 33) + 9)) for i, byte in enumerate(ciphertext)
).encode('ascii')
).encode("ascii")
def generate(self, timestamp: int) -> str:
counter = int(timestamp) // 1000 // self.PERIOD
counter_bytes = counter.to_bytes(8)
counter_bytes = counter.to_bytes(8, "big")
h = hmac.new(self.secret, counter_bytes, hashlib.sha1)
hmac_result = h.digest()