crypto.py 文件源码

def sign_request(key, header, protected_header, payload):
    """
    Creates a JSON Web Signature for the request header and payload using the
    specified account key.
    """
    protected = jose_b64(json.dumps(protected_header).encode('utf8'))
    payload = jose_b64(json.dumps(payload).encode('utf8'))

    signer = key.signer(padding.PKCS1v15(), hashes.SHA256())
    signer.update(protected.encode('ascii'))
    signer.update(b'.')
    signer.update(payload.encode('ascii'))

    return json.dumps({
        'header': header,
        'protected': protected,
        'payload': payload,
        'signature': jose_b64(signer.finalize()),
    })