proof.py 文件源码

def proof_open(team, proof):
    assert isinstance(proof, bytes)
    proof = b64decode(proof)

    claimed_chall_id = proof[2*64:].decode('utf-8')
    claimed_chall = Challenge(claimed_chall_id)

    chall_pk = claimed_chall['pk']
    team_pk = team['sign_pk']

    membership_proof = pysodium.crypto_sign_open(proof, chall_pk)
    chall_id = pysodium.crypto_sign_open(membership_proof,
                                         team_pk).decode('utf-8')

    if claimed_chall_id != chall_id:
        raise ValueError('invalid proof')

    return claimed_chall