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Autpolicy doc fixes #76

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Autpolicy doc fixes #76

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4c5b309
Fix openapi yaml examples
azgabur May 7, 2024
0635010
Fix spacing
azgabur May 7, 2024
2efa953
Add missing gateway to guide and sso url refactor
azgabur May 7, 2024
a9db0d0
Fix oidc url example and typos
azgabur May 9, 2024
e7956c8
Move notes to better place
azgabur May 22, 2024
2c9bdd1
Minor text fix
azgabur Jun 13, 2024
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Fix word then
azgabur Jun 24, 2024
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107 changes: 71 additions & 36 deletions doc/generate-kuadrant-auth-policy.md
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,10 @@ OpenAPI [Security Scheme Object](https://spec.openapis.org/oas/latest.html#secur
The following OAS example has one protected endpoint `GET /dog` with `openIdConnect` security scheme type.

```yaml
openapi: "3.1.0"
info:
title: "Pet Store API"
version: "1.0.0"
paths:
/dog:
get:
Expand All @@ -38,24 +42,20 @@ components:
securitySchemes:
securedDog:
type: openIdConnect
openIdConnectUrl: https://example.com/.well-known/openid-configuration
openIdConnectUrl: https://sso.example.com/auth/realms/petstore
```

Running the command
Take this example and save it as `example.yaml` and than run the command:
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```
kuadrantctl generate kuadrant authpolicy --oas ./petstore-openapi.yaml | yq -P
```bash
kuadrantctl generate kuadrant authpolicy --oas example.yaml
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i dont really get this change, why change the name to be example and why use remove the pretty print?

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The yp command has been removed from multiple guides as is now not needed. The pretty print is done as default.
I changed the name of the yaml file so it does not clash with the same name as the yaml file generated as part of User guide that follows later. I am opened to better file name suggestion though.

```

The generated authpolicy (only relevan fields shown here):
The generated authpolicy (only relevant fields shown here):

```yaml
kind: AuthPolicy
apiVersion: kuadrant.io/v1beta2
metadata:
name: petstore
namespace: petstore
creationTimestamp: null
spec:
routeSelectors:
- matches:
Expand All @@ -68,7 +68,7 @@ spec:
getDog_securedDog:
credentials: {}
jwt:
issuerUrl: https://example.com/.well-known/openid-configuration
issuerUrl: https://sso.example.com/auth/realms/petstore
routeSelectors:
- matches:
- path:
Expand All @@ -82,6 +82,10 @@ spec:
The following OAS example has one protected endpoint `GET /dog` with `apiKey` security scheme type.

```yaml
openapi: "3.1.0"
info:
title: "Pet Store API"
version: "1.0.0"
paths:
/dog:
get:
Expand All @@ -99,21 +103,17 @@ components:
in: query
```

Running the command
Take this example and save it as `example.yaml` and than run the command:
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```
kuadrantctl generate kuadrant authpolicy --oas ./petstore-openapi.yaml | yq -P
```bash
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same here

kuadrantctl generate kuadrant authpolicy --oas example.yaml
```

The generated authpolicy (only relevan fields shown here):
The generated authpolicy (only relevant fields shown here):

```yaml
kind: AuthPolicy
apiVersion: kuadrant.io/v1beta2
metadata:
name: petstore
namespace: petstore
creationTimestamp: null
spec:
routeSelectors:
- matches:
Expand Down Expand Up @@ -232,6 +232,9 @@ kubectl apply -n petstore -f examples/petstore/petstore.yaml

<details>

> Replace `${KEYCLOAK_ISSUER}` with your SSO instance issuer endpoint for your `petstore` realm.
> Otherwise remove the oidc from `components.securitySchemas` and `/dog`, `/snake` paths

```yaml
cat <<EOF >petstore-openapi.yaml
---
Expand Down Expand Up @@ -305,7 +308,7 @@ components:
in: header
oidc:
type: openIdConnect
openIdConnectUrl: https://${KEYCLOAK_PUBLIC_DOMAIN}/auth/realms/petstore
openIdConnectUrl: ${KEYCLOAK_ISSUER}
snakes_api_key:
type: apiKey
name: snake_token
Expand All @@ -315,9 +318,36 @@ EOF

</details>

> Replace `${KEYCLOAK_PUBLIC_DOMAIN}` with your SSO instance domain
* Create `istio-ingressgateway` Gateway object

```yaml
kubectl apply -f -<<EOF
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
name: istio-ingressgateway
namespace: istio-system
spec:
gatewayClassName: istio
listeners:
- allowedRoutes:
namespaces:
from: All
hostname: 'example.com'
name: api
port: 80
protocol: HTTP
EOF
```
* Get the IP of the Gateway:

```bash
export INGRESS_IP=$(kubectl get -n istio-system Service/istio-ingressgateway-istio -o=jsonpath='{.status.loadBalancer.ingress[0].ip}')
```


* Create an API key only valid for `POST /api/v1/cat` endpoint

```yaml
kubectl apply -f -<<EOF
apiVersion: v1
Expand All @@ -333,6 +363,7 @@ stringData:
type: Opaque
EOF
```

> **Note**: the label's value of `kuadrant.io/apikeys-by: cat_api_key` is the name of the sec scheme of the OpenAPI spec.

* Create an API key only valid for `GET /api/v1/snake` endpoint
Expand Down Expand Up @@ -372,15 +403,15 @@ Now, we are ready to test OpenAPI endpoints :exclamation:
- `GET /api/v1/cat` -> It's a public endpoint, hence should return 200 Ok

```bash
curl -H "Host: example.com" -i "http://127.0.0.1:9080/api/v1/cat"
curl -H "Host: example.com" -i "http://${INGRESS_IP}/api/v1/cat"
```

- `POST /api/v1/cat` -> It's a protected endpoint with apikey

Without any credentials, it should return `401 Unauthorized`

```bash
curl -H "Host: example.com" -X POST -i "http://127.0.0.1:9080/api/v1/cat"
curl -H "Host: example.com" -X POST -i "http://${INGRESS_IP}/api/v1/cat"
```

```
Expand All @@ -403,7 +434,7 @@ What if we try a wrong token? one token assigned to other endpoint,
i.e. `I_LIKE_SNAKES` instead of the valid one `I_LIKE_CATS`. It should return `401 Unauthorized`.

```bash
curl -H "Host: example.com" -H "api_key: I_LIKE_SNAKES" -X POST -i "http://127.0.0.1:9080/api/v1/cat"
curl -H "Host: example.com" -H "api_key: I_LIKE_SNAKES" -X POST -i "http://${INGRESS_IP}/api/v1/cat"
```

```
Expand All @@ -422,40 +453,44 @@ The *reason* headers tell that `the API Key provided is invalid`.
Using valid token (from the secret `cat-api-key-1` assigned to `POST /api/v1/cats`)
in the `api_key` header should return 200 Ok

```
curl -H "Host: example.com" -H "api_key: I_LIKE_CATS" -X POST -i "http://127.0.0.1:9080/api/v1/cat"
```bash
curl -H "Host: example.com" -H "api_key: I_LIKE_CATS" -X POST -i "http://${INGRESS_IP}/api/v1/cat"
```

- `GET /api/v1/dog` -> It's a protected endpoint with oidc (assigned to our keycloak instance and `petstore` realm)

without credentials, it should return `401 Unauthorized`

```bash
curl -H "Host: example.com" -i "http://127.0.0.1:9080/api/v1/dog"
curl -H "Host: example.com" -i "http://${INGRESS_IP}/api/v1/dog"
```

#### [Optional] SSO example

To get the authentication token, this example is using Direct Access Grants oauth2 grant type
(also known as Client Credentials grant type). When configuring the Keycloak (OIDC provider) client
(also known as Resource Owner Password Credentials Grant grant type). When configuring the Keycloak (OIDC provider) client
settings, we enabled Direct Access Grants to enable this procedure.
We will be authenticating as `bob` user with `p` password.
We previously created `bob` user in Keycloak in the `petstore` realm.
We will use Command-line JSON processor `jq` to extract the access token into `ACCESS_TOKEN` variable:

```

> Replace `${KEYCLOAK_TOKEN_ENDPOINT}` with your SSO instance token endpoint for your `petstore` realm.

```bash
export ACCESS_TOKEN=$(curl -k -H "Content-Type: application/x-www-form-urlencoded" \
-d 'grant_type=password' \
-d 'client_id=petstore' \
-d 'scope=openid' \
-d 'username=bob' \
-d 'password=p' "https://${KEYCLOAK_PUBLIC_DOMAIN}/auth/realms/petstore/protocol/openid-connect/token" | jq -r '.access_token')
-d 'password=p' \
"${KEYCLOAK_TOKEN_ENDPOINT}" | jq -r '.access_token')
```

> Replace `${KEYCLOAK_PUBLIC_DOMAIN}` with your SSO instance domain


With the access token in place, let's try to get those puppies

```bash
curl -H "Authorization: Bearer $ACCESS_TOKEN" -H 'Host: example.com' http://127.0.0.1:9080/api/v1/dog -i
curl -H "Authorization: Bearer ${ACCESS_TOKEN}" -H 'Host: example.com' "http://${INGRESS_IP}/api/v1/dog" -i
```

it should return 200 OK
Expand All @@ -468,20 +503,20 @@ for an OpenAPI operation.
Without credentials, it should return `401 Unauthorized`

```bash
curl -H "Host: example.com" -i "http://127.0.0.1:9080/api/v1/snake"
curl -H "Host: example.com" -i "http://${INGRESS_IP}/api/v1/snake"
```

With the access token in place, it should return 200 OK (unless the token has expired).

```bash
curl -H "Authorization: Bearer $ACCESS_TOKEN" -H 'Host: example.com' http://127.0.0.1:9080/api/v1/snake -i
curl -H "Authorization: Bearer ${ACCESS_TOKEN}" -H 'Host: example.com' "http://${INGRESS_IP}/api/v1/snake" -i
```

With apiKey it should also work. According to the OpenAPI spec security scheme,
it should be a query string named `snake_token` and the token needs to be valid token
(from the secret `snake-api-key-1` assigned to `GET /api/v1/snake`)

```bash
curl -H 'Host: example.com' -i "http://127.0.0.1:9080/api/v1/snake?snake_token=I_LIKE_SNAKES"
curl -H 'Host: example.com' -i "http://${INGRESS_IP}/api/v1/snake?snake_token=I_LIKE_SNAKES"
```

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