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#!/usr/bin/python3

import json
import sys

import jwt


def catf(f):
    return f.read()


def cat(filename):
    with open(filename, "r") as f:
        return catf(f)


if len(sys.argv) == 1:
    token = catf(sys.stdin).strip()
    obj = jwt.decode(token, verify=False)
elif len(sys.argv) == 2:
    token = cat(sys.argv[1]).strip()
    obj = jwt.decode(token, verify=False)
elif len(sys.argv) == 3:
    token = cat(sys.argv[1]).strip()
    pubkey_text = cat(sys.argv[2])
    opts = {"verify_aud": False, "verify_iss": False}
    obj = jwt.decode(token, verify=True, key=pubkey_text, options=opts)
else:
    assert 0

json.dump(obj, sys.stdout, indent=4)
sys.stdout.write("\n")