56 lines
2 KiB
Python
56 lines
2 KiB
Python
from __future__ import absolute_import
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import json
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import jws.utils as utils
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# local
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import jws.algos as algos
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import jws.header as header
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from jws.exceptions import *
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##############
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# public api #
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##############
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def sign(head, payload, key=None, is_json=False):
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data = {
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'key': key,
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'header': json.loads(head) if is_json else head,
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'payload': json.loads(payload) if is_json else payload,
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'signer': None
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}
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# TODO: re-evaluate whether to pass ``data`` by reference, or to copy and reassign
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header.process(data, 'sign')
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if not data['key']:
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raise MissingKey("Key was not passed as a param and a key could not be found from the header")
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if not data['signer']:
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raise MissingSigner("Header was processed, but no algorithm was found to sign the message")
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signer = data['signer']
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signature = signer(_signing_input(head, payload, is_json), key)
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return utils.to_base64(signature)
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def verify(head, payload, encoded_signature, key=None, is_json=False):
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data = {
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'key': key,
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'header': json.loads(head) if is_json else head,
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'payload': json.loads(payload) if is_json else payload,
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'verifier': None
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}
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# TODO: re-evaluate whether to pass ``data`` by reference, or to copy and reassign
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header.process(data, 'verify')
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if not data['key']:
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raise MissingKey("Key was not passed as a param and a key could not be found from the header")
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if not data['verifier']:
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raise MissingVerifier("Header was processed, but no algorithm was found to sign the message")
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verifier = data['verifier']
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signature = utils.from_base64(encoded_signature)
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return verifier(_signing_input(head, payload, is_json), signature, key)
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####################
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# semi-private api #
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####################
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def _signing_input(head, payload, is_json=False):
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enc = utils.to_base64 if is_json else utils.encode
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head_input, payload_input = map(enc, [head, payload])
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return "%s.%s" % (head_input, payload_input)
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