152 lines
4.2 KiB
Python
152 lines
4.2 KiB
Python
from datetime import timedelta
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import time
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import uuid
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from Cryptodome.PublicKey.RSA import importKey
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from django.utils import timezone
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from jwkest.jwk import RSAKey as jwk_RSAKey
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from jwkest.jwk import SYMKey
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from jwkest.jws import JWS
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from jwkest.jwt import JWT
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from oidc_provider.lib.utils.common import get_issuer
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from oidc_provider.models import (
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Code,
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RSAKey,
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Token,
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)
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from oidc_provider import settings
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def create_id_token(user, aud, nonce='', at_hash='', request=None, scope=[]):
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"""
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Creates the id_token dictionary.
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See: http://openid.net/specs/openid-connect-core-1_0.html#IDToken
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Return a dic.
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"""
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sub = settings.get('OIDC_IDTOKEN_SUB_GENERATOR', import_str=True)(user=user)
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expires_in = settings.get('OIDC_IDTOKEN_EXPIRE')
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# Convert datetimes into timestamps.
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now = timezone.now()
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iat_time = int(time.mktime(now.timetuple()))
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exp_time = int(time.mktime((now + timedelta(seconds=expires_in)).timetuple()))
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user_auth_time = user.last_login or user.date_joined
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auth_time = int(time.mktime(user_auth_time.timetuple()))
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dic = {
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'iss': get_issuer(request=request),
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'sub': sub,
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'aud': str(aud),
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'exp': exp_time,
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'iat': iat_time,
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'auth_time': auth_time,
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}
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if nonce:
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dic['nonce'] = str(nonce)
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if at_hash:
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dic['at_hash'] = at_hash
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if ('email' in scope) and getattr(user, 'email', None):
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dic['email'] = user.email
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processing_hook = settings.get('OIDC_IDTOKEN_PROCESSING_HOOK')
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if isinstance(processing_hook, (list, tuple)):
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for hook in processing_hook:
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dic = settings.import_from_str(hook)(dic, user=user)
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else:
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dic = settings.import_from_str(processing_hook)(dic, user=user)
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return dic
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def encode_id_token(payload, client):
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"""
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Represent the ID Token as a JSON Web Token (JWT).
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Return a hash.
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"""
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keys = get_client_alg_keys(client)
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_jws = JWS(payload, alg=client.jwt_alg)
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return _jws.sign_compact(keys)
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def decode_id_token(token, client):
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"""
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Represent the ID Token as a JSON Web Token (JWT).
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Return a hash.
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"""
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keys = get_client_alg_keys(client)
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return JWS().verify_compact(token, keys=keys)
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def client_id_from_id_token(id_token):
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"""
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Extracts the client id from a JSON Web Token (JWT).
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Returns a string or None.
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"""
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payload = JWT().unpack(id_token).payload()
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return payload.get('aud', None)
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def create_token(user, client, scope, id_token_dic=None):
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"""
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Create and populate a Token object.
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Return a Token object.
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"""
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token = Token()
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token.user = user
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token.client = client
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token.access_token = uuid.uuid4().hex
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if id_token_dic is not None:
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token.id_token = id_token_dic
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token.refresh_token = uuid.uuid4().hex
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token.expires_at = timezone.now() + timedelta(
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seconds=settings.get('OIDC_TOKEN_EXPIRE'))
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token.scope = scope
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return token
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def create_code(user, client, scope, nonce, is_authentication,
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code_challenge=None, code_challenge_method=None):
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"""
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Create and populate a Code object.
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Return a Code object.
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"""
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code = Code()
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code.user = user
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code.client = client
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code.code = uuid.uuid4().hex
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if code_challenge and code_challenge_method:
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code.code_challenge = code_challenge
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code.code_challenge_method = code_challenge_method
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code.expires_at = timezone.now() + timedelta(
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seconds=settings.get('OIDC_CODE_EXPIRE'))
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code.scope = scope
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code.nonce = nonce
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code.is_authentication = is_authentication
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return code
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def get_client_alg_keys(client):
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"""
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Takes a client and returns the set of keys associated with it.
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Returns a list of keys.
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"""
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if client.jwt_alg == 'RS256':
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keys = []
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for rsakey in RSAKey.objects.all():
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keys.append(jwk_RSAKey(key=importKey(rsakey.key), kid=rsakey.kid))
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if not keys:
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raise Exception('You must add at least one RSA Key.')
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elif client.jwt_alg == 'HS256':
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keys = [SYMKey(key=client.client_secret, alg=client.jwt_alg)]
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else:
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raise Exception('Unsupported key algorithm.')
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return keys
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