ingress-nginx-validate-jwt

❗ This project has been superseded by OIDC-Guard, which provides authentication and authorization for both APIs and web applications, supporting JWT, cookie authentication, and more!

What is this?

This project is an API server which is used along with the nginx.ingress.kubernetes.io/auth-url annotation for ingress-nginx and enables per Ingress customizable JWT validation.

Supports AMD64 and ARM64

Install

helm repo add ingress-nginx-validate-jwt https://ivanjosipovic.github.io/ingress-nginx-validate-jwt

helm repo update

helm install ingress-nginx-validate-jwt \
ingress-nginx-validate-jwt/ingress-nginx-validate-jwt \
--create-namespace \
--namespace ingress-nginx-validate-jwt \
--set openIdProviderConfigurationUrl="https://login.microsoftonline.com/common/v2.0/.well-known/openid-configuration"

Options

• openIdProviderConfigurationUrl
  • OpenID Provider Configuration Url for your Identity Provider
• logLevel
  • Logging Level (Trace, Debug, Information, Warning, Error, Critical, and None)
• Helm Values

Configure Ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress
  namespace: default
  annotations:
    nginx.ingress.kubernetes.io/auth-url: http://ingress-nginx-validate-jwt.ingress-nginx-validate-jwt.svc.cluster.local:8080/auth?tid=11111111-1111-1111-1111-111111111111&aud=22222222-2222-2222-2222-222222222222&aud=33333333-3333-3333-3333-333333333333
spec:

Parameters

The /auth endpoint supports configurable parameters in the format of {claim}={value}. In the case the same claim is called more than once, the traffic will have to match only one.

For example, using the following query string /auth?
tid=11111111-1111-1111-1111-111111111111
&aud=22222222-2222-2222-2222-222222222222
&aud=33333333-3333-3333-3333-333333333333

Along with validating the JWT token, the token must have a claim tid=11111111-1111-1111-1111-111111111111 and one of aud=22222222-2222-2222-2222-222222222222 or aud=33333333-3333-3333-3333-333333333333

How to query arrays

The /auth endpoint is able to query arrays. We'll use the following JWT token in the example.

{
  "email": "johndoe@example.com",
  "groups": ["admin", "developers"],
}

Using the following query string we can limit this endpoint to only tokens with an admin group /auth?
groups=admin

Inject claims as headers

The /auth endpoint supports a custom parameter called "inject-claim". The value is the name of claim which will be added to the response headers.

For example, using the following query string /auth?
tid=11111111-1111-1111-1111-111111111111
&aud=22222222-2222-2222-2222-222222222222
&inject-claim=email

The /auth response will contain header email=someuser@domain.com

Inject claims as headers with custom name

The value should be in the following format, "{claim name},{header name}".

For example, using the following query string /auth?
tid=11111111-1111-1111-1111-111111111111
&aud=22222222-2222-2222-2222-222222222222
&inject-claim=email,mail

The /auth response will contain header mail=someuser@domain.com

Example Ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: app
  annotations:
    nginx.ingress.kubernetes.io/auth-url: http://ingress-nginx-validate-jwt.ingress-nginx-validate-jwt.svc.cluster.local:8080/auth?aud=11111111-11111-1111111111&inject-claim=groups,JWT-Claim-Groups&inject-claim=scope,JWT-Claim-Scope
    nginx.ingress.kubernetes.io/auth-response-headers: JWT-Claim-Groups, JWT-Claim-Scope

Design

Metrics

Metrics are exposed on :8080/metrics

Metric Name	Description
ingress_nginx_validate_jwt_authorized	Number of Authorized operations ongoing
ingress_nginx_validate_jwt_unauthorized	Number of Unauthorized operations ongoing
ingress_nginx_validate_jwt_duration_seconds	Histogram of JWT validation durations

Building locally

cd src/ingress-nginx-validate-jwt
docker build -t ingress-nginx-validate-jwt -f Dockerfile .
docker run ingress-nginx-validate-jwt -e "OpenIdProviderConfigurationUrl=https://login.microsoftonline.com/common/v2.0/.well-known/openid-configuration"