def sign_vtt(self, transaction) -> VTTransaction:
vtt_body = transaction.body
vtt_hash = sha256(vtt_body.to_pb_bytes())
der_bytes = self.sign_hash(vtt_hash).encode(compact=False)
signature = Signature(secp256k1=Secp256k1Signature(der=der_bytes))
pubkey = self.to_public().pub_key()
_sig = KeyedSignature(signature=signature, public_key=pubkey)
transaction.signatures.append(_sig)
return transaction
def verify_openssl(signature: Signature, signature_form: bytes,
pub: 'WitPublicKey'):
"""Validate a signature using OpenSSL"""
import os
import tempfile
with tempfile.TemporaryDirectory() as directory_name:
with open(directory_name + '/sig.raw', 'wb') as file:
file.write(signature.encode())
with open(directory_name + '/hash1.sha256', 'wb') as file:
file.write(sha256(signature_form))
with open(directory_name + '/key.hex', 'w') as file:
file.write('3056301006072a8648ce3d020106052b8104000a034200\n' +
pub.hex())
os.system(
f'xxd -r -p < {directory_name}/key.hex | openssl pkey -pubin -inform der > {directory_name}/key.pem'
)
os.system(
f'openssl sha256 < {directory_name}/hash1.sha256 -verify {directory_name}/key.pem -signature {directory_name}/sig.raw'
)
def hash(self):
return sha256(self.pb_bytes())
def hash(self):
print(type(self.msg), bytes(self.msg))
return sha256(bytes(self.msg))
def encode(self):
data = self.serialize()
assert len(data) == 78
checksum = sha256(sha256(data))[:4]
return base58.encode(data + checksum)
def decode(cls, string: str) -> 'ExtendedKey':
bts = base58.decode(string)
assert len(bts) == 82, f'Invalid length {len(bts)})'
data, checksum = bts[:78], bts[78:]
assert sha256(sha256(data)).startswith(checksum), 'Invalid checksum'
return cls.deserialize(data)
