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Examples

The JWT feature was introduced with Gloo Gateway Enterprise, release 0.13.16. If you are using an earlier version, this tutorial will not work.

Table of Contents

Setup

Before you begin, set up basic JWT authorization and configure a Virtual Service to verify JWTs by following the steps in JWT and Access Control.

Matching against nested JWT claims

By default, matching is supported for only top-level claims of the JWT. To additionally enable matching against nested claims, or claims that are children of top-level claims, you must specify a nestedClaimDelimiter, such as ., in the RBAC policy, and specify the claim name as a path, such as parent.child.foo: user, in the claims field of the jwtPrincipal.

Sample JWT (nested claims)

Consider an example JWT with the following claims:

{
  "iss": "kubernetes/serviceaccount",
  "sub": "1234567890",
  "iat": 1516239022,
  "metadata": {
    "auth": {
      "role": "user"
    }
  }
}

Virtual Service (nested claims)

To ensure that GET requests to the /api/pets endpoint are permitted only to users that have a JWT with the role claim set to user, configure the Virtual Service with the following RBAC policy:

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: petstore
  namespace: gloo-system
spec:
  virtualHost:
    domains:
    - '*'
    routes:
    - matchers:
      - prefix: /
      routeAction:
        single:
          kube:
            ref:
              name: petstore
              namespace: default
            port: 8080
    options:
      jwt:
        providers:
          kube:
            issuer: kubernetes/serviceaccount
            jwks:
              local:
                key: |
                  -----BEGIN PUBLIC KEY-----
                  MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApj2ac/hNZLm/66yoDQJ2
                  mNtQPX+3RXcTMhLnChtFEsvpDhoMlS0Gakqkmg78OGWs7U4f6m1nD/Jc7UThxxks
                  o9x676sxxLKxo8TC1w6t47HQHucJE0O5wFNtC8+4jwl4zOBVwnkAEeN+X9jJq2E7
                  AZ+K6hUycOkWo8ZtZx4rm1bnlDykOa9VCuG3MCKXNexujLIixHOeEOylp7wNedSZ
                  4Wfc5rM9Cich2F6pIoCwslHYcED+3FZ1ZmQ07h1GG7Aaak4N4XVeJLsDuO88eVkv
                  FHlGdkW6zSj9HCz10XkSPK7LENbgHxyP6Foqw10MANFBMDQpZfNUHVPSo8IaI+Ot
                  xQIDAQAB
                  -----END PUBLIC KEY-----
      rbac:
        policies:
          viewer:
            nestedClaimDelimiter: .
            permissions:
              methods:
              - GET
              pathPrefix: /api/pets
            principals:
            - jwtPrincipal:
                claims:
                  metadata.auth.role: user

Matching against non-string JWT claim values

By default, claims are matched against values by using exact string comparison. To instead match claims against non-string values, you must specify a ClaimMatcher in the matcher field of the jwtPrincipal.

Matching boolean values

Sample JWT (boolean)

Consider an example JWT with the following claims:

{
  "iss": "kubernetes/serviceaccount",
  "sub": "1234567890",
  "iat": 1516239022,
  "email_verified": true
}

Virtual Service (boolean)

To ensure that GET requests to the /api/pets endpoint are permitted only to users that have a JWT with the email_verified claim set to true, configure the Virtual Service with the following RBAC policy:

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: petstore
  namespace: gloo-system
spec:
  virtualHost:
    domains:
    - '*'
    routes:
    - matchers:
      - prefix: /
      routeAction:
        single:
          kube:
            ref:
              name: petstore
              namespace: default
            port: 8080
    options:
      jwt:
        providers:
          kube:
            issuer: kubernetes/serviceaccount
            jwks:
              local:
                key: |
                  -----BEGIN PUBLIC KEY-----
                  MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApj2ac/hNZLm/66yoDQJ2
                  mNtQPX+3RXcTMhLnChtFEsvpDhoMlS0Gakqkmg78OGWs7U4f6m1nD/Jc7UThxxks
                  o9x676sxxLKxo8TC1w6t47HQHucJE0O5wFNtC8+4jwl4zOBVwnkAEeN+X9jJq2E7
                  AZ+K6hUycOkWo8ZtZx4rm1bnlDykOa9VCuG3MCKXNexujLIixHOeEOylp7wNedSZ
                  4Wfc5rM9Cich2F6pIoCwslHYcED+3FZ1ZmQ07h1GG7Aaak4N4XVeJLsDuO88eVkv
                  FHlGdkW6zSj9HCz10XkSPK7LENbgHxyP6Foqw10MANFBMDQpZfNUHVPSo8IaI+Ot
                  xQIDAQAB
                  -----END PUBLIC KEY-----
      rbac:
        policies:
          viewer:
            permissions:
              methods:
              - GET
              pathPrefix: /api/pets
            principals:
            - jwtPrincipal:
                claims:
                  email_verified: true
                matcher: BOOLEAN

Matching list values

Sample JWT (list)

Consider an example JWT with the following claims:

{
  "iss": "kubernetes/serviceaccount",
  "sub": "1234567890",
  "iat": 1516239022,
  "roles": [
    "super_user",
    "manage-account",
    "manage-account-links",
    "view-profile"
  ]
}

Virtual Service (list)

To ensure that GET requests to the /api/pets endpoint are permitted only to users that have a JWT with the roles claim that contains super_user within its list, configure the Virtual Service with the following RBAC policy:

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: petstore
  namespace: gloo-system
spec:
  virtualHost:
    domains:
    - '*'
    routes:
    - matchers:
      - prefix: /
      routeAction:
        single:
          kube:
            ref:
              name: petstore
              namespace: default
            port: 8080
    options:
      jwt:
        providers:
          kube:
            issuer: kubernetes/serviceaccount
            jwks:
              local:
                key: |
                  -----BEGIN PUBLIC KEY-----
                  MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApj2ac/hNZLm/66yoDQJ2
                  mNtQPX+3RXcTMhLnChtFEsvpDhoMlS0Gakqkmg78OGWs7U4f6m1nD/Jc7UThxxks
                  o9x676sxxLKxo8TC1w6t47HQHucJE0O5wFNtC8+4jwl4zOBVwnkAEeN+X9jJq2E7
                  AZ+K6hUycOkWo8ZtZx4rm1bnlDykOa9VCuG3MCKXNexujLIixHOeEOylp7wNedSZ
                  4Wfc5rM9Cich2F6pIoCwslHYcED+3FZ1ZmQ07h1GG7Aaak4N4XVeJLsDuO88eVkv
                  FHlGdkW6zSj9HCz10XkSPK7LENbgHxyP6Foqw10MANFBMDQpZfNUHVPSo8IaI+Ot
                  xQIDAQAB
                  -----END PUBLIC KEY-----
      rbac:
        policies:
          viewer:
            permissions:
              methods:
              - GET
              pathPrefix: /api/pets
            principals:
            - jwtPrincipal:
                claims:
                  roles: super_user
                matcher: LIST_CONTAINS