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adds a way to sign detached

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Victor Shyba 2018-12-15 03:24:53 -03:00 committed by Lex Berezhny
parent 5d8e627d02
commit e38ef2af1f
1 changed files with 19 additions and 0 deletions
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19
lbrynet/schema/signer.py
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@ -5,6 +5,7 @@ from lbrynet.schema.address import decode_address
from lbrynet.schema.encoding import decode_b64_fields
from lbrynet.schema.schema.certificate import Certificate
from lbrynet.schema.schema.claim import Claim
from lbrynet.schema.signature import Signature
from lbrynet.schema.validator import validate_claim_id
from lbrynet.schema.schema import V_0_0_1, CLAIM_TYPE, CLAIM_TYPES, CERTIFICATE_TYPE, VERSION
from lbrynet.schema.schema import NIST256p, NIST384p, SECP256k1, SHA256, SHA384
@ -73,6 +74,24 @@ class NIST_ECDSASigner(object):
return Claim.load(msg)
def detached_sign_stream_claim(self, claim, claim_address, cert_claim_id, name: str):
assert self.CURVE_NAME == SECP256k1, f"Only SECP256k1 is supported, not: {self.CURVE_NAME}"
validate_claim_id(cert_claim_id)
if not isinstance(self.private_key, ecdsa.SigningKey):
raise Exception("Not given a signing key")
decoded_addr = decode_address(claim_address)
name = name.lower().encode()
raw_cert_id = binascii.unhexlify(cert_claim_id)
to_sign = bytearray()
to_sign.extend(name)
to_sign.extend(decoded_addr)
to_sign.extend(claim.serialized_no_signature)
to_sign.extend(raw_cert_id)
digest = self.HASHFUNC(to_sign).digest()
return Signature(self.private_key.sign_digest_deterministic(digest, hashfunc=self.HASHFUNC), raw_cert_id)
class NIST256pSigner(NIST_ECDSASigner):
CURVE = ecdsa.NIST256p