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import json
import os
from jwt.algorithms import has_crypto
from jwt.utils import base64url_decode
try:
from cryptography.hazmat.primitives.asymmetric import ec
except ModuleNotFoundError:
pass
if has_crypto:
from jwt.algorithms import RSAAlgorithm
BASE_PATH = os.path.dirname(os.path.abspath(__file__))
def decode_value(val):
decoded = base64url_decode(val)
return int.from_bytes(decoded, byteorder="big")
def load_hmac_key():
with open(os.path.join(BASE_PATH, "jwk_hmac.json")) as infile:
keyobj = json.load(infile)
return base64url_decode(keyobj["k"])
def load_rsa_key():
with open(os.path.join(BASE_PATH, "jwk_rsa_key.json")) as infile:
return RSAAlgorithm.from_jwk(infile.read())
def load_rsa_pub_key():
with open(os.path.join(BASE_PATH, "jwk_rsa_pub.json")) as infile:
return RSAAlgorithm.from_jwk(infile.read())
def load_ec_key():
with open(os.path.join(BASE_PATH, "jwk_ec_key.json")) as infile:
keyobj = json.load(infile)
return ec.EllipticCurvePrivateNumbers(
private_value=decode_value(keyobj["d"]),
public_numbers=load_ec_pub_key_p_521().public_numbers(),
)
def load_ec_pub_key_p_521():
with open(os.path.join(BASE_PATH, "jwk_ec_pub_P-521.json")) as infile:
keyobj = json.load(infile)
return ec.EllipticCurvePublicNumbers(
x=decode_value(keyobj["x"]),
y=decode_value(keyobj["y"]),
curve=ec.SECP521R1(),
).public_key()
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