Project Information
- Repository: https://github.com/hernandev/steem-verifier
- Project Name: steem-verifier
Expected behavior
When giving a valid transaction id, steem-verifier should show the public key of the signer and the user name of the signer.
Actual behavior`
Install steem-verifier with
pip install steem-verifier
and enter the following into the terminal:
steem-verifier d6457b3ad20583b3434f3a06c2c648b3a770c341
Now steem-verifier crashes with:
ecdsa.numbertheory.SquareRootError: 76198183007165409965398859979003670973818984091490751645956120696063919941083 has no square root modulo 115792089237316195423570985008687907853269984665640564039457584007908834671663
How to reproduce
Here is the proof that d6457b3ad20583b3434f3a06c2c648b3a770c341 is a valid trx
(using https://steemd.com/tx/d6457b3ad20583b3434f3a06c2c648b3a770c341):
- Browser/App version: Python 3.6.4, steempy 1.0.0
- Operating system: Linux brooks.uberspace.de 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Recording Of The Bug
Traceback:
Traceback (most recent call last):
File "/home/holger80/.local/bin/steem-verifier", line 11, in <module>
sys.exit(entry())
File "/home/holger80/.local/lib/python3.6/site-packages/verifier/cli.py", line 48, in entry
public_keys = verifier.get_public_keys(transaction_data)
File "/home/holger80/.local/lib/python3.6/site-packages/verifier/verifier.py", line 56, in get_public_keys
for key in transaction.verify(chain=self.chain):
File "/home/holger80/.local/lib/python3.6/site-packages/steembase/transactions.py", line 225, in verify
p = self.recover_public_key(self.digest, sig, recoverParameter)
File "/home/holger80/.local/lib/python3.6/site-packages/steembase/transactions.py", line 141, in recover_public_key
beta = ecdsa.numbertheory.square_root_mod_prime(alpha, curve.p())
File "/home/holger80/.local/lib/python3.6/site-packages/ecdsa/numbertheory.py", line 165, in square_root_mod_prime
% ( a, p ) )
ecdsa.numbertheory.SquareRootError: 76198183007165409965398859979003670973818984091490751645956120696063919941083 has no square root modulo 115792089237316195423570985008687907853269984665640564039457584007908834671663
It is possible to use the secp256k1 module for sign and verify in steem-python. Let's see if the usage of this module changes something:
=> Extracting public keys...
Traceback (most recent call last):
File "/home/holger80/.local/bin/steem-verifier", line 11, in <module>
sys.exit(entry())
File "/home/holger80/.local/lib/python3.6/site-packages/verifier/cli.py", line 48, in entry
public_keys = verifier.get_public_keys(transaction_data)
File "/home/holger80/.local/lib/python3.6/site-packages/verifier/verifier.py", line 56, in get_public_keys
for key in transaction.verify(chain=self.chain):
File "/home/holger80/.local/lib/python3.6/site-packages/steembase/transactions.py", line 213, in verify
sig = pub.ecdsa_recoverable_deserialize(sig, recoverParameter)
File "/home/holger80/.local/lib/python3.6/site-packages/secp256k1/__init__.py", line 136, in ecdsa_recoverable_deserialize
raise Exception("invalid rec_id")
Exception: invalid rec_id
Does also not work, but different error message.