jwt_jwe.py

from jwcrypto import jwk, jwe
import json
import time

def encrypt(payload):
    payload = json.dumps(payload)
    protected_header = {
            "alg": "RSA-OAEP-256",
            "enc": "A128GCM",
            "kid": "<KID>",
            "iat": int(round(time.time() * 1000))
            }
    jwetoken = jwe.JWE(payload.encode('utf-8'),
            recipient=loadPem('./server_cert.pem'),
            protected=protected_header)
    encryptedPayload = jwetoken.serialize(compact=True)
    return {"encData": encryptedPayload}

def loadPem(filePath):
    with open(filePath, "rb") as pemfile:
        return jwk.JWK.from_pem(pemfile.read())

request_timestamp = 12341234

payload  = {
        'requestHeader': {
            'requestTS': request_timestamp,
            'requestMessageID': "SINGLE_BIN_LOOKUP-#{request_timestamp}",
            },
        'requestData': {
            'paymentAccountType': 'P',
            'paymentAccount': '<PAN>'
            }
        }
print(encrypt(payload))