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fix: do not serialize-deserialize secret for p2pk signature check (#398)

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This commit is contained in:
callebtc
2024-01-25 20:56:41 +01:00
committed by GitHub
parent b307c4db79
commit 7b5192c27a
3 changed files with 6 additions and 6 deletions
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6
cashu/core/p2pk.py
View File

@@ -68,16 +68,16 @@ class P2PKSecret(Secret):
return int(n_sigs) if n_sigs else None
def sign_p2pk_sign(message: bytes, private_key: PrivateKey):
def sign_p2pk_sign(message: bytes, private_key: PrivateKey) -> bytes:
# ecdsa version
# signature = private_key.ecdsa_serialize(private_key.ecdsa_sign(message))
signature = private_key.schnorr_sign(
hashlib.sha256(message).digest(), None, raw=True
)
return signature.hex()
return signature
def verify_p2pk_signature(message: bytes, pubkey: PublicKey, signature: bytes):
def verify_p2pk_signature(message: bytes, pubkey: PublicKey, signature: bytes) -> bool:
# ecdsa version
# return pubkey.ecdsa_verify(message, pubkey.ecdsa_deserialize(signature))
return pubkey.schnorr_verify(

2
cashu/mint/conditions.py
View File

@@ -83,7 +83,7 @@ class LedgerSpendingConditions:
logger.trace(f"verifying signature {input_sig} by pubkey {pubkey}.")
logger.trace(f"Message: {p2pk_secret.serialize().encode('utf-8')}")
if verify_p2pk_signature(
message=p2pk_secret.serialize().encode("utf-8"),
message=proof.secret.encode("utf-8"),
pubkey=PublicKey(bytes.fromhex(pubkey), raw=True),
signature=bytes.fromhex(input_sig),
):

4
cashu/wallet/p2pk.py
View File

@@ -79,7 +79,7 @@ class WalletP2PK(SupportsPrivateKey, SupportsDb):
sign_p2pk_sign(
message=proof.secret.encode("utf-8"),
private_key=private_key,
)
).hex()
for proof in proofs
]
logger.debug(f"Signatures: {signatures}")
@@ -95,7 +95,7 @@ class WalletP2PK(SupportsPrivateKey, SupportsDb):
sign_p2pk_sign(
message=output.B_.encode("utf-8"),
private_key=private_key,
)
).hex()
for output in outputs
]