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#!/usr/bin/env python from __future__ import absolute_import, print_function import argparse import json import sys import time from . import DecodeError, __version__, decode, encode def encode_payload(args): # Try to encode if args.key is None: raise ValueError('Key is required when encoding. See --help for usage.') # Build payload object to encode payload = {} for arg in args.payload: k, v = arg.split('=', 1) # exp +offset special case? if k == 'exp' and v[0] == '+' and len(v) > 1: v = str(int(time.time()+int(v[1:]))) # Cast to integer? if v.isdigit(): v = int(v) else: # Cast to float? try: v = float(v) except ValueError: pass # Cast to true, false, or null? constants = {'true': True, 'false': False, 'null': None} if v in constants: v = constants[v] payload[k] = v token = encode( payload, key=args.key, algorithm=args.algorithm ) return token.decode('utf-8') def decode_payload(args): try: if args.token: token = args.token else: if sys.stdin.isatty(): token = sys.stdin.readline().strip() else: raise IOError('Cannot read from stdin: terminal not a TTY') token = token.encode('utf-8') data = decode(token, key=args.key, verify=args.verify) return json.dumps(data) except DecodeError as e: raise DecodeError('There was an error decoding the token: %s' % e) def build_argparser(): usage = ''' Encodes or decodes JSON Web Tokens based on input. %(prog)s [options] <command> [options] input Decoding examples: %(prog)s --key=secret decode json.web.token %(prog)s decode --no-verify json.web.token Encoding requires the key option and takes space separated key/value pairs separated by equals (=) as input. Examples: %(prog)s --key=secret encode iss=me exp=1302049071 %(prog)s --key=secret encode foo=bar exp=+10 The exp key is special and can take an offset to current Unix time. ''' arg_parser = argparse.ArgumentParser( prog='pyjwt', usage=usage ) arg_parser.add_argument( '-v', '--version', action='version', version='%(prog)s ' + __version__ ) arg_parser.add_argument( '--key', dest='key', metavar='KEY', default=None, help='set the secret key to sign with' ) arg_parser.add_argument( '--alg', dest='algorithm', metavar='ALG', default='HS256', help='set crypto algorithm to sign with. default=HS256' ) subparsers = arg_parser.add_subparsers( title='PyJWT subcommands', description='valid subcommands', help='additional help' ) # Encode subcommand encode_parser = subparsers.add_parser('encode', help='use to encode a supplied payload') payload_help = """Payload to encode. Must be a space separated list of key/value pairs separated by equals (=) sign.""" encode_parser.add_argument('payload', nargs='+', help=payload_help) encode_parser.set_defaults(func=encode_payload) # Decode subcommand decode_parser = subparsers.add_parser('decode', help='use to decode a supplied JSON web token') decode_parser.add_argument( 'token', help='JSON web token to decode.', nargs='?') decode_parser.add_argument( '-n', '--no-verify', action='store_false', dest='verify', default=True, help='ignore signature and claims verification on decode' ) decode_parser.set_defaults(func=decode_payload) return arg_parser def main(): arg_parser = build_argparser() try: arguments = arg_parser.parse_args(sys.argv[1:]) output = arguments.func(arguments) print(output) except Exception as e: print('There was an unforseen error: ', e) arg_parser.print_help()