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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()