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from typing import List, Tuple, Dict, Any, Union
from autobahn.xbr._eip712_delegate_certificate import EIP712DelegateCertificate
from autobahn.xbr._eip712_authority_certificate import EIP712AuthorityCertificate
[docs]def parse_certificate_chain(certificates: List[Tuple[Dict[str, Any], str]]) \
-> List[Union[EIP712DelegateCertificate, EIP712AuthorityCertificate]]:
"""
:param certificates:
:return:
"""
# parse the whole certificate chain
cert_chain = []
for cert_hash, cert_data, cert_sig in certificates:
if cert_data['primaryType'] == 'EIP712DelegateCertificate':
cert = EIP712DelegateCertificate.parse(cert_data)
elif cert_data['primaryType'] == 'EIP712AuthorityCertificate':
cert = EIP712AuthorityCertificate.parse(cert_data)
else:
assert False, 'should not arrive here'
cert_chain.append(cert)
# FIXME: proper adaptive implementation of certificate chain rules checking
# if False:
# assert len(cert_chain) == 3
#
# # Certificate Chain Rules (CCR):
# #
# # 1. **CCR-1**: The `chainId` and `verifyingContract` must match for all certificates to what we expect, and `validFrom` before current block number on the respective chain.
# # 2. **CCR-2**: The `realm` must match for all certificates to the respective realm.
# # 3. **CCR-3**: The type of the first certificate in the chain must be a `EIP712DelegateCertificate`, and all subsequent certificates must be of type `EIP712AuthorityCertificate`.
# # 4. **CCR-4**: The last certificate must be self-signed (`issuer` equals `subject`), it is a root CA certificate.
# # 5. **CCR-5**: The intermediate certificate's `issuer` must be equal to the `subject` of the previous certificate.
# # 6. **CCR-6**: The root certificate must be `validFrom` before the intermediate certificate
# # 7. **CCR-7**: The `capabilities` of intermediate certificate must be a subset of the root cert
# # 8. **CCR-8**: The intermediate certificate's `subject` must be the delegate certificate `delegate`
# # 9. **CCR-9**: The intermediate certificate must be `validFrom` before the delegate certificate
# # 10. **CCR-10**: The root certificate's signature must be valid and signed by the root certificate's `issuer`.
# # 11. **CCR-11**: The intermediate certificate's signature must be valid and signed by the intermediate certificate's `issuer`.
# # 12. **CCR-12**: The delegate certificate's signature must be valid and signed by the `delegate`.
#
# # CCR-1
# chainId = 1
# verifyingContract = a2b_hex('0xf766Dc789CF04CD18aE75af2c5fAf2DA6650Ff57'[2:])
# for cert in cert_chain:
# assert cert.chainId == chainId
# assert cert.verifyingContract == verifyingContract
#
# # CCR-2
# realm = a2b_hex('0xA6e693CC4A2b4F1400391a728D26369D9b82ef96'[2:])
# for cert in cert_chain[1:]:
# assert cert.realm == realm
#
# # CCR-3
# assert isinstance(cert_chain[0], EIP712DelegateCertificate)
# for i in [1, len(cert_chain) - 1]:
# assert isinstance(cert_chain[i], EIP712AuthorityCertificate)
#
# # CCR-4
# assert cert_chain[2].subject == cert_chain[2].issuer
#
# # CCR-5
# assert cert_chain[1].issuer == cert_chain[2].subject
#
# # CCR-6
# assert cert_chain[2].validFrom <= cert_chain[1].validFrom
#
# # CCR-7
# assert cert_chain[2].capabilities == cert_chain[2].capabilities | cert_chain[1].capabilities
#
# # CCR-8
# assert cert_chain[1].subject == cert_chain[0].delegate
#
# # CCR-9
# assert cert_chain[1].validFrom <= cert_chain[0].validFrom
#
# # CCR-10
# _issuer = cert_chain[2].recover(a2b_hex(cert_sigs[2]))
# assert _issuer == cert_chain[2].issuer
#
# # CCR-11
# _issuer = cert_chain[1].recover(a2b_hex(cert_sigs[1]))
# assert _issuer == cert_chain[1].issuer
#
# # CCR-12
# _issuer = cert_chain[0].recover(a2b_hex(cert_sigs[0]))
# assert _issuer == cert_chain[0].delegate
return cert_chain