Implement Not-Enforced URIs for Authentication

By default, IG routes protect resources (such as a websites or applications) from all requests on the route’s condition path. Some parts of the resource, however, do not need to be protected. For example, it can be okay for unauthenticated requests to access the welcome page of a web site, or an image or favicon.

The following sections give examples of routes that do not enforce authentication for a specific request URL or URL pattern, but enforce authentication for other request URLs:

Implement Not-Enforced URIs With a SwitchFilter

Before you start:

  • Prepare IG and the sample app as described in the Getting Started

  • Install and configure AM on http://openam.example.com:8088/openam, using the default configuration.

    1. On your system, add the following data in a comma-separated value file:

      • Linux

      • Windows

      /tmp/userfile.txt
      C:\Temp\userfile.txt
      username,password,fullname,email
      george,C0stanza,George Costanza,george@example.com
      kramer,N3wman12,Kramer,kramer@example.com
      bjensen,H1falutin,Babs Jensen,bjensen@example.com
      demo,Ch4ng31t,Demo User,demo@example.com
      kvaughan,B5ibery12,Kirsten Vaughan,kvaughan@example.com
      scarter,S9rain12,Sam Carter,scarter@example.com
    2. Set up AM:

      1. (For AM 6.5.x and earlier versions) Select Identities > demo, and set the demo user password to Ch4ng31t.

      2. (For AM 6.5.3 and later versions) Select Services > Add a Service, and add a Validation Service with the following Valid goto URL Resources :

        • http://openig.example.com:8080/*

        • http://openig.example.com:8080/*?*

      3. Select Applications > Agents > Identity Gateway, add an agent with the following values:

    3. Set up IG:

      1. Set an environment variable for the IG agent password, and then restart IG:

        $ export AGENT_SECRET_ID='cGFzc3dvcmQ='

        The password is retrieved by a SystemAndEnvSecretStore, and must be base64-encoded.

      2. Add the following route to IG, to serve .css and other static resources for the sample application:

        • Linux

        • Windows

        $HOME/.openig/routes/static-resources.json
        appdata\OpenIG\config\routes\static-resources.json
        {
          "name" : "sampleapp-resources",
          "baseURI" : "http://app.example.com:8081",
          "condition": "${matches(request.uri.path,'^/css')}",
          "handler": "ReverseProxyHandler"
        }
      3. Add the following route to IG:

        • Linux

        • Windows

        $HOME/.openig/routes/not-enforced-switch.json
        appdata\OpenIG\config\routes\not-enforced-switch.json
        {
          "properties": {
            "notEnforcedPathPatterns": "^/home|^/favicon.ico|^/css"
          },
          "heap": [
            {
              "name": "SystemAndEnvSecretStore-1",
              "type": "SystemAndEnvSecretStore"
            },
            {
              "name": "AmService-1",
              "type": "AmService",
              "config": {
                "agent": {
                  "username": "ig_agent",
                  "passwordSecretId": "agent.secret.id"
                },
                "secretsProvider": "SystemAndEnvSecretStore-1",
                "url": "http://openam.example.com:8088/openam/",
                "version": "7.1"
              }
            }
          ],
          "name": "not-enforced-switch",
          "condition": "${matches(request.uri.path, '^/')}",
          "baseURI": "http://app.example.com:8081",
          "handler": {
            "type": "Chain",
            "config": {
              "filters": [
                {
                  "name": "SwitchFilter-1",
                  "type": "SwitchFilter",
                  "config": {
                    "onRequest": [{
                      "condition": "${matches(request.uri.path, '&{notEnforcedPathPatterns}')}",
                      "handler": "ReverseProxyHandler"
                    }]
                  }
                },
                {
                  "type": "SingleSignOnFilter",
                  "config": {
                    "amService": "AmService-1"
                  }
                },
                {
                  "type": "PasswordReplayFilter",
                  "config": {
                    "loginPage": "${true}",
                    "credentials": {
                      "type": "FileAttributesFilter",
                      "config": {
                        "file": "/tmp/userfile.txt",
                        "key": "email",
                        "value": "${contexts.ssoToken.info.uid}@example.com",
                        "target": "${attributes.credentials}"
                      }
                    },
                    "request": {
                      "method": "POST",
                      "uri": "http://app.example.com:8081/login",
                      "form": {
                        "username": [
                          "${attributes.credentials.username}"
                        ],
                        "password": [
                          "${attributes.credentials.password}"
                        ]
                      }
                    }
                  }
                }
              ],
              "handler": "ReverseProxyHandler"
            }
          }
        }

        Notice the following features of the route:

        • The route condition is /, so the route matches all requests.

        • The SwitchFilter passes requests on the path ^/home, ^/favicon.ico, and ^/css directly to the ReverseProxyHandler. All other requests continue the along the chain to the SingleSignOnFilter.

        • If the request does not have a valid AM session cookie, the SingleSignOnFilter redirects the request to AM for authentication. The SingleSignOnFilter stores the cookie value in an SsoTokenContext.

        • Because the PasswordReplayFilter detects that the response is a login page, it uses the FileAttributesFilter to replay the password, and logs the request into the sample application.

    4. Test the setup:

      1. If you are logged in to AM, log out and clear any cookies.

      2. Access the route on the not-enforced URL http://openig.example.com:8080/home. The home page of the sample app is displayed without authentication.

      3. Access the route on the enforced URL http://openig.example.com:8080/profile. The SingleSignOnFilter redirects the request to AM for authentication.

      4. Log in to AM as user demo, password Ch4ng31t. The PasswordReplayFilter replays the credentials for the demo user. The request is passed to the sample app’s profile page for the demo user.

Implement Not-Enforced URIs With a DispatchHandler

To use a DispatchHandler for not-enforced URIs, replace the route in Implement Not-Enforced URIs With a SwitchFilter with the following route. If the request is on the path ^/home, ^/favicon.ico, or ^/css, the DispatchHandler sends it directly to the ReverseProxyHandler, without authentication. It passes all other requests into the Chain for authentication.

{
  "properties": {
    "notEnforcedPathPatterns": "^/home|^/favicon.ico|^/css"
  },
  "heap": [
    {
      "name": "SystemAndEnvSecretStore-1",
      "type": "SystemAndEnvSecretStore"
    },
    {
      "name": "AmService-1",
      "type": "AmService",
      "config": {
        "agent": {
          "username": "ig_agent",
          "passwordSecretId": "agent.secret.id"
        },
        "secretsProvider": "SystemAndEnvSecretStore-1",
        "url": "http://openam.example.com:8088/openam/",
        "version": "7.1"
      }
    }
  ],
  "name": "not-enforced-dispatch",
  "condition": "${matches(request.uri.path, '^/')}",
  "baseURI": "http://app.example.com:8081",
  "handler": {
    "type": "DispatchHandler",
    "config": {
      "bindings": [
        {
          "condition": "${matches(request.uri.path, '&{notEnforcedPathPatterns}')}",
          "handler": "ReverseProxyHandler"
        },
        {
          "handler": {
            "type": "Chain",
            "config": {
              "filters": [
                {
                  "type": "SingleSignOnFilter",
                  "config": {
                    "amService": "AmService-1"
                  }
                },
                {
                  "type": "PasswordReplayFilter",
                  "config": {
                    "loginPage": "${true}",
                    "credentials": {
                      "type": "FileAttributesFilter",
                      "config": {
                        "file": "/tmp/userfile.txt",
                        "key": "email",
                        "value": "${contexts.ssoToken.info.uid}@example.com",
                        "target": "${attributes.credentials}"
                      }
                    },
                    "request": {
                      "method": "POST",
                      "uri": "http://app.example.com:8081/login",
                      "form": {
                        "username": [
                          "${attributes.credentials.username}"
                        ],
                        "password": [
                          "${attributes.credentials.password}"
                        ]
                      }
                    }
                  }
                }
              ],
              "handler": "ReverseProxyHandler"
            }
          }
        }
      ]
    }
  }
}