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#!/usr/bin/env python
from __future__ import absolute_import, print_function
import json
import optparse
import sys
import time
from . import DecodeError, __package__, __version__, decode, encode
def main():
usage = '''Encodes or decodes JSON Web Tokens based on input.
%prog [options] input
Decoding examples:
%prog --key=secret json.web.token
%prog --no-verify json.web.token
Encoding requires the key option and takes space separated key/value pairs
separated by equals (=) as input. Examples:
%prog --key=secret iss=me exp=1302049071
%prog --key=secret foo=bar exp=+10
The exp key is special and can take an offset to current Unix time.\
'''
p = optparse.OptionParser(
usage=usage,
prog=__package__,
version='%s %s' % (__package__, __version__),
)
p.add_option(
'-n', '--no-verify',
action='store_false',
dest='verify',
default=True,
help='ignore signature verification on decode'
)
p.add_option(
'--key',
dest='key',
metavar='KEY',
default=None,
help='set the secret key to sign with'
)
p.add_option(
'--alg',
dest='algorithm',
metavar='ALG',
default='HS256',
help='set crypto algorithm to sign with. default=HS256'
)
options, arguments = p.parse_args()
if len(arguments) > 0 or not sys.stdin.isatty():
if len(arguments) == 1 and (not options.verify or options.key):
# Try to decode
try:
if not sys.stdin.isatty():
token = sys.stdin.read()
else:
token = arguments[0]
token = token.encode('utf-8')
data = decode(token, key=options.key, verify=options.verify)
print(json.dumps(data))
sys.exit(0)
except DecodeError as e:
print(e)
sys.exit(1)
# Try to encode
if options.key is None:
print('Key is required when encoding. See --help for usage.')
sys.exit(1)
# Build payload object to encode
payload = {}
for arg in arguments:
try:
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
except ValueError:
print('Invalid encoding input at {}'.format(arg))
sys.exit(1)
try:
token = encode(
payload,
key=options.key,
algorithm=options.algorithm
)
print(token)
sys.exit(0)
except Exception as e:
print(e)
sys.exit(1)
else:
p.print_help()
if __name__ == '__main__':
main()
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