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proto.cosmos.tx.protobuf: move ecdsa verify_sig() backend to test suite

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The MMGen Project 2026-09-15 10:51:03 +00:00
commit 5b95f47a53
Signed by: mmgen
GPG key ID: 3F8B1861E32B7DA2
2 changed files with 31 additions and 20 deletions
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34
mmgen/proto/cosmos/tx/protobuf.py
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@ -122,6 +122,8 @@ class Tx(BaseMessage):
authInfo: Annotated[bytes, Field(2)]
signatures: Annotated[list[bytes], Field(3)]
verify_sig_backends = ('secp256k1',)
@property
def raw(self):
return RawTx(
@ -133,30 +135,24 @@ class Tx(BaseMessage):
def txid(self):
return sha256(bytes(self.raw)).hexdigest()
def verify_sig_secp256k1(self, *, sig, msghash, pubkey):
from ...secp256k1.secp256k1 import verify_sig
if not verify_sig(sig, msghash, pubkey):
raise ValueError('signature verification failed')
# raises exception on failure:
def verify_sig(self, cfg, proto, account_number, backend='secp256k1'):
if not backend in self.verify_sig_backends:
raise ValueError(f'verify_sig(): {backend}: unrecognized backend')
sign_doc = SignDoc(
bodyBytes = bytes(self.body),
authInfoBytes = bytes(self.authInfo),
chainId = proto.chain_id,
accountNumber = account_number)
sig = self.signatures[0]
pubkey = self.authInfo.signerInfos[0].publicKey.key.data
msghash = sha256(bytes(sign_doc)).digest()
match backend:
case 'secp256k1':
from ...secp256k1.secp256k1 import verify_sig
if not verify_sig(sig, msghash, pubkey):
raise ValueError('signature verification failed')
case 'ecdsa':
if not cfg.test_suite:
from ....util import die
die(3, 'The `ecdsa` package is unsafe and may be used only in a testing environment')
# ecdsa.keys.VerifyingKey.verify_digest():
# raises BadSignatureError if the signature is invalid or malformed
import ecdsa
ec_pubkey = ecdsa.VerifyingKey.from_string(pubkey, curve=ecdsa.curves.SECP256k1)
ec_pubkey.verify_digest(sig, msghash)
case _:
raise ValueError(f'verify_sig(): {backend}: unrecognized backend')
getattr(self, f'verify_sig_{backend}')(
sig = self.signatures[0],
msghash = sha256(bytes(sign_doc)).digest(),
pubkey = self.authInfo.signerInfos[0].publicKey.key.data)

15
test/overlay/fakemods/mmgen/proto/cosmos/tx/protobuf.py Normal file
View file

@ -0,0 +1,15 @@
from .protobuf_orig import *
class overlay_fake_Tx:
verify_sig_backends = ('secp256k1', 'ecdsa')
def verify_sig_ecdsa(self, *, sig, msghash, pubkey):
# ecdsa.keys.VerifyingKey.verify_digest():
# raises BadSignatureError if the signature is invalid or malformed
import ecdsa
ec_pubkey = ecdsa.VerifyingKey.from_string(pubkey, curve=ecdsa.curves.SECP256k1)
ec_pubkey.verify_digest(sig, msghash)
Tx.verify_sig_backends = overlay_fake_Tx.verify_sig_backends
Tx.verify_sig_ecdsa = overlay_fake_Tx.verify_sig_ecdsa