199 lines
4.5 KiB
Markdown
199 lines
4.5 KiB
Markdown
# ungleich-otp
|
||
|
||
ungleich-otp is a full blown authentication and authorisation service
|
||
made for micro services.
|
||
|
||
The basic idea is that every micro service has a (long term) seed and
|
||
creates time based tokens (See python pyotp, RFC4226, RFC6238).
|
||
|
||
## Setup instructions ##
|
||
|
||
This is a standard django project and thus can be easily setup using
|
||
|
||
```
|
||
pip install -r requirements.txt
|
||
```
|
||
|
||
To bootstrap the application, you need your very first trusted seed to
|
||
access the application. You can generate it using
|
||
|
||
```
|
||
to be filled in
|
||
```
|
||
|
||
After that, you can run the application using
|
||
|
||
```
|
||
python manage.py runserver
|
||
```
|
||
|
||
The usual instructions on how to setup an https proxy should be followed.
|
||
|
||
## Realms ##
|
||
|
||
Access is granting/denied based on realms. There are two reserved
|
||
realms, all other realms can be used by the users:
|
||
|
||
### Reserved realms
|
||
|
||
Conceptually the realms "ungleich-admin" and "ungleich-auth" are
|
||
reserved for higher priviliged applications.
|
||
|
||
Usually there is only 1 entry in ungleich-admin that is used to
|
||
bootstrap and manage ungleich-otp.
|
||
|
||
All micro services that are trusted to authenticate another micro
|
||
service should have an entry in the ungleich-auth realm, which allows
|
||
them to verify a token of somebody else.
|
||
|
||
|
||
| Name | Capabilities |
|
||
|------------------+--------------------------------------------|
|
||
| ungleich-admin | authenticate, create, delete, list, update |
|
||
| ungleich-auth | authenticate |
|
||
| all other realms | NO ACCESS |
|
||
|
||
|
||
## Usage: REST ##
|
||
|
||
- Use an existing token to connect to the service
|
||
- All REST based messages: JSON
|
||
|
||
|
||
### POST: /ungleichotp/verify
|
||
|
||
Request JSON object:
|
||
|
||
```
|
||
{
|
||
version: "1",
|
||
name: "your-name",
|
||
realm: "your-realm",
|
||
token: "current time based token",
|
||
verifyname: "name that wants to be authenticated",
|
||
verifyrealm: "realm that wants to be authenticated",
|
||
verifytoken: "token that wants to be authenticated",
|
||
}
|
||
```
|
||
|
||
Response JSON object:
|
||
|
||
Either HTTP 200 with
|
||
```
|
||
{
|
||
status: "OK",
|
||
}
|
||
```
|
||
|
||
OR return code 403:
|
||
|
||
* If token for authenticating is wrong, you get
|
||
|
||
```
|
||
{"detail":"Incorrect authentication credentials."}
|
||
```
|
||
|
||
* If token that is being verified is wrong, you get
|
||
|
||
```
|
||
{"detail":"You do not have permission to perform this action."}
|
||
```
|
||
|
||
### GET, POST, ... /ungleichotp/
|
||
|
||
Standard django rest framework behaviour for updating / listing
|
||
objects.
|
||
|
||
|
||
## Usage: OTP
|
||
|
||
The seeds that you receive can be used for TOTP to authenticate your
|
||
apps.
|
||
|
||
|
||
## Database
|
||
|
||
The database saves a list of appuuids with their seeds and the user
|
||
assignments as well as whether the appuuid might use the BUS interface.
|
||
|
||
Fields:
|
||
|
||
- appuuid (a random UUID)
|
||
- appname (name chosen by the user)
|
||
- username (who this appuuid belongs to)
|
||
- seed (a random base32 string)
|
||
- trusted (boolean, whether app is allowed to use the BUS and the
|
||
verify method)
|
||
|
||
|
||
## Environment / Configuration
|
||
|
||
- POSTGRES_USERNAME
|
||
- SECRET_KEY -- random
|
||
|
||
## Random notes / stuff
|
||
|
||
django.db.backends.postgresql
|
||
django.contrib.admin
|
||
|
||
```
|
||
DATABASES = {
|
||
'default': {
|
||
'ENGINE': 'django.db.backends.postgresql',
|
||
'NAME': 'mydatabase',
|
||
'USER': 'mydatabaseuser',
|
||
'PASSWORD': 'mypassword',
|
||
'HOST': '127.0.0.1',
|
||
'PORT': '5432',
|
||
}
|
||
}
|
||
```
|
||
|
||
Custom auth
|
||
|
||
```
|
||
from django.contrib.auth.models import User
|
||
from rest_framework import authentication
|
||
from rest_framework import exceptions
|
||
|
||
class ExampleAuthentication(authentication.BaseAuthentication):
|
||
def authenticate(self, request):
|
||
username = request.META.get('X_USERNAME')
|
||
if not username:
|
||
return None
|
||
|
||
try:
|
||
user = User.objects.get(username=username)
|
||
except User.DoesNotExist:
|
||
raise exceptions.AuthenticationFailed('No such user')
|
||
|
||
return (user, None)
|
||
|
||
```
|
||
|
||
Custom user
|
||
|
||
Don’t forget to point AUTH_USER_MODEL to it. Do this before creating any migrations or running manage.py migrate for the first time.
|
||
|
||
|
||
|
||
## TODOs
|
||
|
||
- [x] serialize / input request
|
||
- [x] Make seed read only
|
||
- [x] Implement registering of new entries
|
||
- [x] OTPSerializer: allow to read seed for admin
|
||
- [x] Implement deleting entry
|
||
- [x] Include verify in ModelSerializer
|
||
- [ ] Remove hard coded JSON (?)
|
||
- [ ] Use Custom authentication (?) - needs to have a user
|
||
- [ ] Maybe we map name+realm == User (?)
|
||
- name == name@realm
|
||
- no password
|
||
- seed
|
||
- custom auth method
|
||
- [ ] Implement creating new "User"
|
||
- by POST / Model based
|
||
- [ ] move totp constants into settings
|
||
- [ ] move field lengths into settings
|
||
- [ ] make settings adjustable by environment (?)
|