Traceback (most recent call last):
  File "/home/user1/lambdatest/lib/python3.6/site-packages/lambda_local/main.py", line 92, in execute
    result = func(event, context.activate())
  File "lambda_process_S3.py", line 81, in lambda_handler
    loaded_public_key.verify(sig, shf, ec.ECDSA(hashes.SHA256()))
  File "/home/user1/lambdatest/lib/python3.6/site-packages/cryptography/hazmat/backends/openssl/ec.py", line 298, in verify
    _ecdsa_sig_verify(self._backend, self, signature, data)
  File "/home/user1/lambdatest/lib/python3.6/site-packages/cryptography/hazmat/backends/openssl/ec.py", line 89, in _ecdsa_sig_verify
    raise InvalidSignature
cryptography.exceptions.InvalidSignature