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BIP 340: Verify sig before returning it

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This commit is contained in:
Jonas Nick 2020-02-24 17:01:19 +00:00
parent b6b5f58e6e
commit 9bfa53e9fb
1 changed files with 4 additions and 1 deletions
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bip-0340/reference.py
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@ -110,7 +110,10 @@ def schnorr_sign(msg, seckey0, aux_rand):
R = point_mul(G, k0)
k = n - k0 if not has_square_y(R) else k0
e = int_from_bytes(tagged_hash("BIP340/challenge", bytes_from_point(R) + bytes_from_point(P) + msg)) % n
return bytes_from_point(R) + bytes_from_int((k + e * seckey) % n)
sig = bytes_from_point(R) + bytes_from_int((k + e * seckey) % n)
if not schnorr_verify(msg, bytes_from_point(P), sig):
raise RuntimeError('The signature does not pass verification.')
return sig
def schnorr_verify(msg, pubkey, sig):
if len(msg) != 32: