import json

from jwt import (
    JWT,
    jwk_from_dict,
    jwk_from_pem,
)

message = {
    'iss': 'https://example.com/',
    'sub': 'yosida95',
    'iat': 1485969205,
    'exp': 1485972805,
}

with open('rsa_private_key.pem', 'rb') as fh:
    signing_key = jwk_from_pem(fh.read())

jwt = JWT()
compact_jws = jwt.encode(message, signing_key, 'RS256')

with open('rsa_public_key.json', 'r') as fh:
    verifying_key = jwk_from_dict(json.load(fh))

message_received = jwt.decode(compact_jws, verifying_key)

assert message == message_received