def signProposal(proposal, entity, signersCert):
import hashlib
from ecdsa import util
from ecdsa import VerifyingKey
import binascii
# Sign the proposal
proposalBytes = proposal.SerializeToString()
#print("Proposal Bytes = \n{0}\n\n".format(binascii.hexlify(bytearray(proposalBytes))))
# calculate sha2_256 and dump for info only
digest = hashlib.sha256(proposalBytes).digest()
print("Proposal Bytes digest= \n{0}\n\n".format( binascii.hexlify(bytearray(digest)) ))
signature = entity.sign(proposalBytes)
# signature = signingKey.sign(proposalBytes, hashfunc=hashlib.sha256, sigencode=util.sigencode_der)
#Verify the signature
entity.verifySignature(signature=signature, signersCert=signersCert, data=proposalBytes)
# vk = VerifyingKey.from_der(crypto.dump_publickey(crypto.FILETYPE_ASN1, signersCert.get_pubkey()))
# assert vk.verify(signature, proposalBytes, hashfunc=hashlib.sha256, sigdecode=util.sigdecode_der), "Invalid signature!!"
print("Proposal Bytes signature= \n{0}\n\n".format(binascii.hexlify(bytearray(signature))))
print("")
signedProposal = proposal_pb2.SignedProposal(proposalBytes=proposalBytes, signature=signature)
return signedProposal
def signProposal(proposal, entity, signersCert):
import binascii
# Sign the proposal
proposalBytes = proposal.SerializeToString()
signature = entity.sign(proposalBytes)
#Verify the signature
entity.verifySignature(signature=signature, signersCert=signersCert, data=proposalBytes)
# print("Proposal Bytes signature= \n{0}\n\n".format(binascii.hexlify(bytearray(signature))))
signedProposal = proposal_pb2.SignedProposal(proposal_bytes=proposalBytes, signature=signature)
return signedProposal
