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added Stepans fix

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This commit is contained in:
benarc 2021-12-15 14:47:45 +00:00
parent b968a0c13f
commit 4f6e49b02f
1 changed files with 6 additions and 3 deletions
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9
lnbits/extensions/lnurlpos/lnurl.py
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@ -83,9 +83,12 @@ async def handle_lnurl_firstrequest(
"reason": f"Invalid hex or base64 payload: {payload}",
}
h = hashlib.sha256(nonceb)
h.update(pos.key.encode())
s = h.digest()
if len(payloadb)!=8:
raise RuntimeError("Expected 8 bytes")
expected = hmac.new(pos.key.encode(), payloadb[:-2], digestmod="sha256").digest()
if expected[:2] != payloadb[-2:]:
raise RuntimeError("Invalid HMAC")
s = hmac.new(pos.key.encode(), nonceb, digestmod="sha256").digest()
res = bytearray(payloadb)
for i in range(len(res)):