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yosida95 avatar yosida95 commented on May 23, 2024 1

You can decode a JWS signed by a symmetric key in the same way to decode one signed by a asymmetric key like below.

import jwt


jwk = {"kty": "oct", "k": "# YOUR SYMMETRIC JWK KEY #"}
key = jwt.jwk_from_dict(jwk)
instance = jwt.JWT()
instance.decode('JWT PAYLOAD', key)

You can also refer to the working test case at

python-jwt/jwt/tests/test_jwt.py

Lines 26 to 50 in 6e45f9d

class JWTTest(TestCase):
def setUp(self):
self.inst = JWT()
self.key = jwk_from_dict(
json.loads(load_testdata('oct.json', 'r')))
self.message = {
'iss': 'joe',
'exp': 1300819380,
'http://example.com/is_root': True,
}
self.compact_jws = (
'eyJ0eXAiOiJKV1QiLA0KICJhbGciOiJIUzI1NiJ9'
'.'
'eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt'
'cGxlLmNvbS9pc19yb290Ijp0cnVlfQ'
'.'
'dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk'
)
def test_decode(self):
message = self.inst.decode(self.compact_jws, self.key)
self.assertEqual(message, self.message)

from python-jwt.

yosida95 avatar yosida95 commented on May 23, 2024

Or you can also instantiate symmetric JWK directly as below.

import jwt
from jwt.jwk import OctetJWK

key = OctetJWK(b'SYMMETRIC KEY')
instance = jwt.JWT() 
instance.decode('JWT PAYLOAD', key)

from python-jwt.

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