How to integrate the SDK in your application

v1.x

This document contains installation instructions for the following mobile frameworks:

• Swift
• Objective-C
• React Native

Swift

Supported iOS Versions

PerimeterX supports iOS version 8 and higher.

Introduction

The PerimeterX iOS SDK works by constantly profiling and evaluating device behavior to ensure that the connections to your mobile APIs and services are genuine.

This process is complex and detailed yet only requires initializing a context to manage a set of secure HTTP headers which are added to all HTTP and HTTPS requests made by the mobile application to the origin server. These HTTP headers are refreshed on a regular basis by the PerimeterX Manager (context) as it is profiling the end-user’s mobile device.

The PerimeterX iOS SDK works well with popular HTTP request libraries for iOS including Alamofire.

Prerequisites

The following are required to install the PerimeterX iOS SDK:

• Administrative access to the PerimeterX Portal to:
  • Retrieve the PerimeterX application ID.
  • Set the token expiration and validity.
• An active PerimeterX Enforcer.

Integration

Adding the iOS SDK to your project

1. Add the PerimeterX iOS SDK Binary to Your Project with:

https://github.com/PerimeterX/px-iOS-Framework (the official
repository for hosting the PerimeterX iOS SDK). The repository can be integrated with CocoaPods or Carthage.

CocoaPods

Add pod 'PerimeterX' to your
Podfile.

    source 'https://github.com/CocoaPods/Specs.git'
    platform :ios, '10.0'
    use_frameworks!
    
    target '<Your App Name>' do
        pod 'PerimeterX'
    end

You can now run pod update and once completed don’t forget to close and reopen your Xcode workspace.

Carthage

Add the following to the app's Cartfile:

`binary "https://raw.githubusercontent.com/PerimeterX/px-iOS-Framework/master/PerimeterX.json"`

Then run

`carthage update --platform iOS`

2. Once the binary is added to your project, resync the build files to ensure the package is downloaded.
3. The SDK is now installed, and there should not be any build errors when compiling your application.

Adding the PerimeterX Manager Object

1. In your AppDelegate.swift file import the PerimeterX library.
   import PerimeterX
2. In your AppDelegate.swift file, add the PXManagerDelegate
   extension using the example below.

    extension AppDelegate:PXManagerDelegate {
    func managerReady(_ httpHeaders: [AnyHashable : Any]!) {
        print("PerimeterX - managerReady: \(httpHeaders)")
    }

    func newHeaders(_ httpHeaders: [AnyHashable : Any]!) {
        print("PerimeterX - new headers: \(httpHeaders)")
    }
}

• When initializing the PXManagerDelegate instance the managerReady is called when the first set of PerimeterX HTTP headers are available.
• Setting the newHeaders is required to ensures that the PXManagerDelegate will notify the application that a refresh to the HTTP headers occurred. This is based on the token validity time set in the PerimeterX portal.
• Action in the newHeaders method is optional. (reference the code example above).

Initializing the PerimeterX Manager

In your main application function in AppDelegate.swift you must now initialize the PXManager object inside the didFinishLaunchingWithOptions handler:

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        // PerimeterX SDK should start here
        if let pxmanager = PXManager.sharedInstance() {
            pxmanager.delegate = self
            pxmanager.start(with: "PX12345678") //Takes your PerimeterX Application ID
        }

        return true
    }

Adding the PerimeterX HTTP Headers to the HTTP Requests

1. Once the PerimeterX Manager is initialized, add PerimeterX HTTP Headers to your network manager headers.
   You are now set to start your requests.
2. The PerimeterX HTTP headers can be retrieved by calling httpHeaders() and will return a dictionary of type String: String.

Using Volley

To add the PerimeterX HTTP headers to a request using AlamoFire, use the following example:

    let pxHeaders: HTTPHeaders = (PXManager.sharedInstance().httpHeaders() as? HTTPHeaders)!

    Alamofire.request(url, encoding: JSONEncoding.default, headers: pxHeaders).responseJSON { response in
        print(response.request)  // original URL request
        print(response.response) // HTTP URL response
        print(response.data)     // server data
    }

Managing Requests Denied by PerimeterX

When a HTTP request is denied by PerimeterX a 403 response code is sent in the HTTP response along with a JSON body encoded as a UTF-8 that is parsed and used by the PerimeterX iOS SDK. The parsed JSON is then used to render a WebView to either challenge (with CAPTCHA) the visitor, or block the visitor from continuing in the application. If the user solves the presented challenge they will return to the application. If the user fails the CAPTCHA challenge they continue to be challenged until they pass the verification screen.

Implementing the Error Handler

The PXManager object checks the body of the returned error message by calling the checkError() method, and passing in the body as response.dictionaryObject. This will return an object type of PXBlockType.

The PXBlockType object is processed by calling handle() method of the PXManager, and passing four arguments: PXBlockType, UIViewControler, successHandler, failureHandler.

The handle() method renders the WebView containing the CAPTCHA challenge.

    let pxHeaders: HTTPHeaders = (PXManager.sharedInstance().httpHeaders() as? HTTPHeaders)!

    let url = "https://example.com/demo/api"

    Alamofire.request(url, encoding: JSONEncoding.default, headers: pxHeaders).responseJSON { response in

        guard let statusCode = (response.response?.statusCode) else {
            print("Error - statusCode is missing from the reponse...");
            return
        }

       if statusCode == 403 {
            print("status is 403")
            let response = JSON(data: response.data!)
            let blockRepsponse = PXManager.sharedInstance().checkError(response.dictionaryObject) // Check the type of error with the SDK

            if (blockRepsponse?.type == PXBlockType.Block || blockRepsponse?.type == PXBlockType.Captcha) {
                PXManager.sharedInstance().handle(blockRepsponse, with: self, captchaSuccess: {
                    print("success")

                }, captchaClose: {
                    print("failure")
                })
            }
        }

        // do something here
    }

Depending on how your application is built, an attacker can be blocked on any network call your application makes. The attacker can be blocked while the application is loading, and the only thing the user sees is the splash screen. The attacker can be in a background thread when the application makes API calls to retrieve a session token or to request data from the server to be presented on the screen.

You can choose what screen to display after the blocked user successfully solves a CAPTCHA challenge. The user can be redirected to their previous activity and retry the network calls that were blocked. The user can be returned to their previous activity and have to repeat the action that was blocked. The user can be redirected to a different screen.

WebView Integration

Added in version: v1.15.1

If your application includes a WKWebView, you need to allow PerimeterX SDK to handle the session connection between the web view and the application.
This is done automatically by starting the SDK with the PXManager.startWith method.
If your web view needs to handle deprecated TLS connections, make sure to implement webView:authenticationChallenge:shouldAllowDeprecatedTLS delegate method. The current implementation does not allow deprecated TLS versions.

Adding Custom Parameters

Added in version: v1.4.1

Custom parameters allow you to collect and send specific information, be it device or app related, that may be used later for aggregations and intelligence. Using PXManager's setCustomParametersDictionary() method you can specify up to 10 custom parameters to be sent to PerimeterX servers on every network request.

setCustomParametersDictionary() accepts a Dictionary of type [String:String] with all the keys begining with custom_param followed by a number (1-10).

It is also important to note that the setCustomParametersDictionary() method is set once inside the didFinishLaunchingWithOptions handler, before calling the start method.

The following example adds 2 custom parameters:

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        // PerimeterX SDK should start here
        if let pxmanager = PXManager.sharedInstance() {
            pxmanager.delegate = self
            pxmanager.setCustomParametersDictionary(["custom_param1": "John Bradley", "custom_param2": "New York"])
            pxmanager.start(with: "PX12345678") //Takes your PerimeterX Application ID
        }

        return true
    }

Support Account Defender (From version 1.16.3)

To enable this feature a user ID must be set. That can be done by calling the PXAccountDefenderManager.setUserId function and providing the user ID. When the user ID is changed, the function should be called again with the updated user ID. If the user logged out, the function should be called with nil. This function should be called after the PXManager.startWith function.
To register outgoing URL requests, call the PXAccountDefenderManager.registerOutgoingUrlRequest function with the URL. This function should be called only when Account Defender is enabled (user ID is set).

User Agent Convention

PerimeterX uses the application's user agent to identify and differentiate between application versions. For accurate detection it is important that the user agent your application reports is informative. Here is the recommended convention:

Doctor App

The "Doctor App" is a tool to help you verify the mobile SDK integration by simulating a typical user flow in your application. To enable this feature, add the enableDoctorCheck = true parameter in the start method.

Example:

PXManager.sharedInstance().start(with: "[YOUR_APP_ID]", enableDoctorCheck: true)

Flow:

1. Welcome screen: In this screen you select whether to start a new test or load the summary of the previous test, if one exists.
2. Instructions screen: In this screen you get detailed instructions on how the Doctor app works
3. Test selection screen: In this screen you choose which type of test to execute. Options are:
   a. Native app framework - test your native URL requests.
   b. Web view framework - test your web view's URL requests.
   After executing either test, you will return to this screen to be able to execute the other test or to continue and review the test results in the summary screen.
   
4. Summary screen: In this screen you are able to view the results of the executed tests. You can go into details regarding each test and get troubleshooting tips in case a test failed to help you analyze what is causing this issue.
   

Verifying Your Integration

Validating that PXManager is Loaded Properly

Checking the ManagerReady Callback

To verify that SDK is implemented correctly, print a line to the console when the ManagerReady callback is fired.

    func managerReady(_ httpHeaders: [AnyHashable : Any]!) {
        print("PerimeterX - managerReady: \(httpHeaders)")
    }

A log line similar to the example below should be displayed.

    PerimeterX - managerReady: Optional([AnyHashable("X-PX-AUTHORIZATION"): 3:09bfe0fa40fafa8b79946854c29c25860b7dc5c014f49254a44291d7ab11eaaf:B2MMdZOi252Q4KD/2w53kyFUtk5mQz36psSTsPUJ3A8kxefY9tN6M4c7iW0wHnYjQJ94OecOG0tqTu6MEUFvug==:1000:KZ9rHK/mDjaY0KeqHosaoUytDjBbqyJXx2dPYvudp3M8uXJzEYoEZQRiFC8KimtwgbEqoRiRW3nTzKs3FyKJLgsYACSLrFvx+yyT3CWOQr9JkccNTe0W9+JkVko3SrPJp2+XFje9wp5rRShkPX2FV1dpa23CdMnyP92k/ZYWOeI=])

Validating that PerimeterX HTTP Headers Are Part of Your Request

Connections to API endpoint can be inspected using a local proxy such as CharlesProxy_.
When inspecting requests look for the HTTP header named X-PX-AUTHORIZATION.

If this header is not present go back to the application code responsible for making the request and review to verify the headers were added to the request properly.

Validating Denied Requests

Denied requests will have one of two possible actions, block or challenge, and both should be validated to ensure the request is properly handled.

Console Developer Testing Tools

Developers integrating with the PerimeterX Mobile SDK can be given access to the PerimeterX Portal in a developer role. They then have access to the Developer section, which contains the Mobile Enforcement Verification tool. This tool allows a developer the ability to mark their requests to be denied for testing purposes.
The testing tool is necessary to validate denied requests.

1. Access the tool at https://console.perimeterx.com/botDefender/developer
2. Locate your test device's Visitor ID (<glossary:VID>), and click the <glossary:VID>Extractor button.
   This will launch the <glossary:VID>Extractor model:
   
3. Insert your IP address and click Search. This locates all <glossary:VID>for your APP ID.
4. Click Select to return to the tool with the App ID and <glossary:VID>fields populated.
   
5. When the App ID and <glossary:VID>are available, you can start validating denied requests.
   

Validating a Challenge Response

To validate a challenge response:

1. Click CAPTCHA in the test tool and wait for the green toast notification to confirm you are ready to continue.
   
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the CAPTCHA WebView.
3. To force a token refresh simply exit and relaunch the application.
4. Solve the challenge presented and verify that you are able to return to the application and continue using it.
   

Validating a Blocking Response

To validate a blocking response:

1. Click Block in the test tool and wait for the green toast notification to confirm you are ready to continue.
   
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the block WebView.
3. To force a token refresh simply relaunch the application. Once you are blocked you cannot continue.
4. To release from blocking, exit the application, click the Clear button, and reload the application to verify that the clean token was received and the application is operating as expected.
   

Appendix

Configuring an iOS Emulator to use Charles Proxy

To configure your iOS Emulator set the HTTP proxy settings on your computer. The emulator will use your computer’s local network connection.

In order to intercept HTTPS requests follow the guidelines at https://www.charlesproxy.com/documentation/using-charles/ssl-certificates/.

Deactivating the PX Mobile Sensor Remotely

In certain cases, the PX Mobile Sensor (SDK) may need to be deactivated remotely, and the app run without any sensor intervention.

This can be done based on any combination of the following parameters:

1. AppID
2. Operating System
3. Operating System Version
4. SDK Version
5. App Version

To deactivate the PX Mobile Sensor, contact your assigned focal point within PerimeterX. Portal support to allow deactivation via the Portal will be added in the future.

React Native

Supported iOS Versions

PerimeterX supports iOS version 9 and higher.

Introduction

The PerimeterX iOS SDK works by constantly profiling and evaluating device behavior to ensure that the connections to your mobile APIs and services are genuine.

This process is complex and detailed yet only requires initializing a context to manage a set of secure HTTP headers which are added to all HTTP and HTTPS requests made by the mobile application to the origin server. These HTTP headers are refreshed on a regular basis by the PerimeterX Manager (context) as it is profiling the end-user’s mobile device.

Prerequisites

The following are required to install the PerimeterX iOS SDK:

• Administrative access to the PerimeterX Portal to:
  • Retrieve the PerimeterX application ID.
  • Set the token expiration and validity.
• An active PerimeterX Enforcer.
• A sandbox or staging environment for development and testing (recommended).
• React Native dependencies

Integration

Adding the iOS SDK to your project

1. Add the PerimeterX iOS SDK Binary to Your Project with:
   https://github.com/PerimeterX/px-iOS-Framework (the official repository for hosting the PerimeterX iOS SDK).
   The repository can be integrated with CocoaPods or Carthage.

CocoaPods

Add pod 'PerimeterX' to your
Podfile < >__.

    source 'https://github.com/CocoaPods/Specs.git'
    platform :ios, '10.0'
    use_frameworks!

    target '<Your App Name>' do
        pod 'PerimeterX'
    end

You can now run pod update and once completed don’t forget to close and reopen your Xcode workspace.

Carthage

Add the following to the app's Cartfile:

    binary "https://raw.githubusercontent.com/PerimeterX/px-iOS-Framework/master/PerimeterX.json"

Then run

    carthage update --platform iOS

2. Once the binary is added to your project, resync the build files to ensure the package is downloaded.
3. The SDK is now installed, and there should not be any build errors when compiling your application.

Adding the PerimeterX Manager Object

1. In your AppDelegate.mfile import the PerimeterX library.

       #import <PerimeterX/PerimeterX.h>
   

2. In your AppDelegate.mfile, add the following mandatory methods using the example below.

       -(void) newHeaders:(NSDictionary *)httpHeaders {
           NSLog(@"PXManagerDelegate: newHeaders: %@", httpHeaders);
       }
   
       -(void) managerReady:(NSDictionary *)httpHeaders {
           NSLog(@"PXManagerDelegate: managerReady: %@", httpHeaders);
       }
   

• When adding the PXManagerDelegate extension the following two functions are required: managerReady and newHeaders.
• The managerReady is called when the first set of PerimeterX HTTP headers are available.
• Setting the newHeaders is required to ensure that the PXManagerDelegate will notify the application that a refresh to the HTTP headers occurred. This is based on the token validity time set in the PerimeterX portal.
• Action in the newHeaders method is optional. (reference the code example above).

Initializing the PerimeterX Manager

In AppDelegate.m you must now initialize the PXManager object inside the didFinishLaunchingWithOptions handler:

   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        PXManager *pxManager = [PXManager sharedInstance];
        pxManager.delegate = self;
        [pxManager startWith: @"PX123456"]; // Defines your PerimeterX Application ID

        return YES;
    }

Creating a Bridge For The Native Methods

1. In your project, create a new file called PXBridge.hwith the following content:

       #import <Foundation/Foundation.h>
       #import <React/RCTBridgeModule.h>
   
   
       NS_ASSUME_NONNULL_BEGIN
   
       @interface PXBridge : NSObject<RCTBridgeModule>
   
       @end
   
       NS_ASSUME_NONNULL_END
   

2. Create the implementation of PXBridge by creating a file called PXBridge.m with the following content:

    #import "PXBridge.h"
    #import "React/RCTLog.h"
    #import <PerimeterX/PerimeterX.h>

    @implementation PXBridge

    RCT_EXPORT_MODULE();



    RCT_REMAP_METHOD(getHttpHeaders,
                     getHttpHeaders_resolver:(RCTPromiseResolveBlock)resolve
                     getHttpHeaders_rejecter:(RCTPromiseRejectBlock)reject)
    {
      PXManager *pxManager = [PXManager sharedInstance];
      NSDictionary *httpHeaders = [pxManager httpHeaders];
      resolve(httpHeaders);
    }

    RCT_EXPORT_METHOD(verifyResponse:(NSDictionary *)response
                      verifyResponse_resolver:(RCTPromiseResolveBlock)resolve
                      verifyResponse_rejecter:(RCTPromiseRejectBlock)reject)
    {
      PXManager *pxManager = [PXManager sharedInstance];
      PXBlockResponse *blockResponse = [pxManager checkError:response];
      if (blockResponse.type == Block || blockResponse.type == Captcha) {
        dispatch_async(dispatch_get_main_queue(), ^{
        UIViewController *rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController;
        [[PXManager sharedInstance] handleBlockResponse:blockResponse with:rootViewController captchaSuccess:^{
          NSLog(@"captcha success");
          resolve(@"success");
        } captchaClose:^ {
          NSLog(@"captcha closed");
          NSError *error = [NSError errorWithDomain:@"perimeterx.sdk" code:11 userInfo:NULL];
          reject(@"captcha closed", @"challenge page closed",error);
        }];
    });
  }
      else {
        NSLog(@"Not a PerimeterX Response");
        resolve(@"NotPXBlock");
      }
    }
    @end

The bridge exposes the minimal methods required for the SDK to operate:

• getHttpHeaders - returns a JSON file containing the PerimeterX HTTP headers.
• verifyResponse - verifies the 403 response and based on its content - either returns the response unchanged or calls the SDK's handleBlockResponse method.

Adding the PerimeterX HTTP Headers to the HTTP Requests

Once the PerimeterX Manager is initialized, you need to add the PerimeterX HTTP Headers to every network request your app is making. These headers can be retrieved by calling the [pxManager httpHeaders] method of the SDK, which is exposed to the JavaScript side by the bridge created in the earlier step.

Using Axios

To add the PerimeterX HTTP headers to every request using Axios, use the following example:

    import {NativeModules} from 'react-native';

    axios.interceptors.request.use(async (config) => {
        const pxHeaderResponse = await NativeModules.PXBridge.getHttpHeaders();
        for (var prop in pxHeaderResponse) {
            config.headers[prop] = pxHeaderResponse[prop];
        }
        return config;
    }, function (error) {
        throw error;
    });

Using Fetch

To add the PerimeterX HTTP headers to a fetch request, either add the headers directly to each fetch request, or create a wrapper like the following example:

    async function callFetch() {
        const url = '                                      ';
        const pxHeaderResponse = await NativeModules.PXBridge.getHttpHeaders();
        let headers = {};
        for (var prop in pxHeaderResponse) {
            headers[prop] = pxHeaderResponse[prop];
        }
        let result;
        try {
            result = await fetch(url,{
                method: 'GET',
                headers: headers
            })
            let jsonResult = await result.json();
            return jsonResult;
        } catch (e) {
            throw e;
        }
    }

Managing Requests Denied by PerimeterX

When a HTTP request is denied by PerimeterX a 403 response code is sent in the HTTP response along with a JSON body encoded as a UTF-8 that is parsed and used by the PerimeterX iOS SDK. The parsed JSON is then used to render a WebView to either challenge (with CAPTCHA) the visitor, or block the visitor from continuing in the application. If the user solves the presented challenge they will return to the application. If the user fails the CAPTCHA challenge they continue to be challenged until they pass the verification screen.

Implementing the Error Handler

The PXManager object checks the body of the returned error message by calling [[PXManager sharedInstance] checkError:body] and if the 403 error originates from PerimeterX, the [[PXManager sharedInstance] handleBlockResponse:blockResponse] method. A combination of these methods is exposed to the JavaScript side from the native bridge.

The easiest way to implement the error handler in React Native is through the use of Axios's response interceptor.

Using Axios

    axios.interceptors.response.use((response) => {
        return response;
    }, async (error) => {
        if (error.response.status === 403) {
            let result = await NativeModules.PXBridge.verifyResponse(error.response.data);
            if (result == "NotPXBlock") {
                throw error;
            }
        } else {
            throw error;
        }
    });

Using Fetch

    async function callFetch() {
        const url = '                                      ';
        const pxHeaderResponse = await NativeModules.PXBridge.getHttpHeaders();
        let headers = {};
        for (var prop in pxHeaderResponse) {
            headers[prop] = pxHeaderResponse[prop];
        }
        let result;
        try {
            result = await fetch(url,{
                method: 'GET',
                headers: headers
            })
            let jsonResult = await result.json();
            return jsonResult;
        } catch (error) {
            if (error.response.status === 403) {
                let result = await NativeModules.PXBridge.verifyResponse(error.response.data);
                if (result == "NotPXBlock") {
                    throw error;
                }
            } else {
                throw error;
            }
        }
    }

Adding Custom Parameters

Added in version: v1.4.1

Custom parameters allow you to collect and send specific information, be it device or app related, that may be used later for aggregations and intelligence. Using PXManager's setCustomParametersDictionary() method you can specify up to 10 custom parameters to be sent to PerimeterX servers on every network request.

setCustomParametersDictionary() accepts a NSDictionary of type [String:String] with all the keys beginning with custom_param followed by a number (1-10).

It is also important to note that the setCustomParametersDictionary() method is set once inside the didFinishLaunchingWithOptions handler, before calling the start method.

The following example adds 2 custom parameters:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        PXManager *pxManager = [PXManager sharedInstance];
        pxManager.delegate = self;
        [pxManager setCustomParametersDictionary:[NSDictionary dictionaryWithObjectsAndKeys:@"John Bradley",@"custom_param1", @"New York", @"custom_param2", nil]];
        [pxManager startWith: @"PX123456"]; // Defines your PerimeterX Application ID

        return YES;
    }

WebView Integration

Added in version: v1.15.1

If your application includes a WKWebView, you need to allow PerimeterX SDK to handle the session connection between the web view and the application.
This is done automatically by starting the SDK with the PXManager.startWith method.
If your web view needs to handle deprecated TLS connections, make sure to implement webView:authenticationChallenge:shouldAllowDeprecatedTLS delegate method. The current implementation does not allow deprecated TLS versions.

Support Account Defender (From version 1.16.3)

To enable this feature a user ID must be set. That can be done by calling the PXAccountDefenderManager.setUserId function and providing the user ID. When the user ID is changed, the function should be called again with the updated user ID. If the user logged out, the function should be called with nil. This function should be called after the PXManager.startWith function.
To register outgoing URL requests, call the PXAccountDefenderManager.registerOutgoingUrlRequest function with the URL. This function should be called only when Account Defender is enabled (user ID is set).

User Agent Convention

PerimeterX uses the application's user agent to identify and differentiate between application versions. For accurate detection it is important that the user agent your application reports is informative. Here is the recommended convention:

Doctor App

The "Doctor App" is a tool to help you verify the mobile SDK integration by simulating a typical user flow in your application. To enable this feature, add the enableDoctorCheck = true parameter in the start method.

Example:

[PXManager.sharedInstance startWith:@"[YOUR_APP_ID]" enableDoctorCheck:YES];

Flow:

1. Welcome screen: In this screen you select whether to start a new test or load the summary of the previous test, if one exists.
2. Instructions screen: In this screen you get detailed instructions on how the Doctor app works
3. Test selection screen: In this screen you choose which type of test to execute. Options are:
   a. Native app framework - test your native URL requests.
   b. Web view framework - test your web view's URL requests.
   After executing either test, you will return to this screen to be able to execute the other test or to continue and review the test results in the summary screen.
   
4. Summary screen: In this screen you are able to view the results of the executed tests. You can go into details regarding each test and get troubleshooting tips in case a test failed to help you analyze what is causing this issue.
   

Verifying Your Integration

Validating that PXManager is Loaded Properly

Checking the ManagerReady Callback

To verify that SDK is implemented correctly, print a line to the console when the ManagerReady callback is fired.

    -(void) managerReady:(NSDictionary *)httpHeaders {
        NSLog(@"PXManagerDelegate: managerReady: %@", httpHeaders);
    }

A log line similar to the example below should be displayed.

    2017-10-10 15:13:22.536 PX Obj C[64870:23419637] PXManagerDelegate: managerReady: {
        "X-PX-AUTHORIZATION" = "3:497f904bae55a3cca2800da80892a72ba25e5e4beef6798722f0e7743a760b67:pZ98scNgg8mc7LOY74h1uHV1/mybppJORCzop3OSiIbQXnfQI3p12kFMrO+4HuOHt1KD+3oUW8rO+Cvj1kBjag==:1000:7Tonf5zinmI8mX7Y7LynB4pWi56rtqbCp8krXnaeq1TsN07XXeMM9OgnVUmmAq2kEhd0DPDkh+CAVZ+OS0L24cMtlTbJNo0mpbqj9YvAhXwoV2jUT1er9XS+AO1Kq0IERgyaufKQGjwIjXzXVP7zdcG3JuB4m9LyHT1WiWTdLRw=";
    }

Validating that PerimeterX HTTP Headers Are Part of Your Request

Connections to your API endpoint can be inspected using a local proxy such as CharlesProxy_.
When inspecting requests look for the HTTP header named X-PX-AUTHORIZATION.

Please note requests to the perimeterx.net domain are also pinned to a specific SSL certificate and cannot be inspected with Charles Proxy. If you have enabled SSL proxy for all domains you must exclude perimeterx.net.

If this header is not present go back to the application code responsible for making the request and review to verify the headers were added to the request properly.

Validating Denied Requests

Denied requests will have one of two possible actions, block or challenge, and both should be validated to ensure the request is properly handled.

Console Developer Testing Tools

Developers integrating with the PerimeterX Mobile SDK can be given access to the PerimeterX Portal in a developer role. They then have access to the Developer section, which contains the Mobile Enforcement Verification tool. This tool allows a developer the ability to mark their requests to be denied for testing purposes.
The testing tool is necessary to validate denied requests.

Note

Make sure the enforcer you are testing against is set to blocking mode before proceeding with the instructions.

1. Access the tool at https://console.perimeterx.com/botDefender/developer
2. Locate your test device's Visitor ID (<glossary:VID>), and click the <glossary:VID> Extractor button.
   This will launch the <glossary:VID>Extractor model:
3. Insert your IP address and click Search. This locates all <glossary:VID>s for your APP ID.
4. Click Select to return to the tool with the App ID and <glossary:VID> fields populated.
5. When the App ID and <glossary:VID> are available, you can start validating denied requests.

Validating a Challenge Response

To validate a challenge response:

1. Click CAPTCHA in the test tool and wait for the green toast notification to confirm you are ready to continue.
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the CAPTCHA WebView.
3. To force a token refresh simply exit and relaunch the application.
4. Solve the challenge presented and verify that you are able to return to the application and continue using it.

Validating a Blocking Response

To validate a blocking response:

1. ClickBlock in the test tool and wait for the green toast notification to confirm you are ready to continue.
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the block WebView.
3. To force a token refresh simply relaunch the application. Once you are blocked you cannot continue.
4. To release from blocking, exit the application, click the Clear button, and reload the application to verify that the clean token was received and the application is operating as expected.

Appendix

Configuring an iOS Emulator to use Charles Proxy

To configure your iOS Emulator set the HTTP proxy settings on your computer. The emulator will use your computer’s local network connection.

In order to intercept HTTPS requests follow the guidelines at https://www.charlesproxy.com/documentation/using-charles/ssl-certificates/.

Deactivating the PX Mobile Sensor Remotely

In certain cases, the PX Mobile Sensor (SDK) may need to be deactivated remotely, and the app run without any sensor intervention.

This can be done based on any combination of the following parameters:

1. AppID
2. Operating System
3. Operating System Version
4. SDK Version
5. App Version

To deactivate the PX Mobile Sensor, contactsocsupport@humansecurity.com or your assigned focal point within PerimeterX. Portal support to allow deactivation via the Portal will be added in the future

Objective-C

Supported iOS Versions

PerimeterX supports iOS version 8 and higher.

Introduction

The PerimeterX iOS SDK works by constantly profiling and evaluating device behavior to ensure that the connections to your mobile APIs and services are genuine.

This process is complex and detailed yet only requires initializing a context to manage a set of secure HTTP headers which are added to all HTTP and HTTPS requests made by the mobile application to the origin server. These HTTP headers are refreshed on a regular basis by the PerimeterX Manager (context) as it is profiling the end-user’s mobile device.

The PerimeterX iOS SDK works well with popular HTTP request libraries for iOS including AFNetworking

Prerequisites

The following are required to install the PerimeterX iOS SDK:

• Administrative access to the PerimeterX Portal to:
  • Retrieve the PerimeterX application ID.
  • Set the token expiration and validity.
• An active PerimeterX Enforcer.
• A sandbox or staging environment for development and testing (recommended).

Integration

Adding the iOS SDK to your project

1. Add the PerimeterX iOS SDK Binary to Your Project with:
   https://github.com/PerimeterX/px-iOS-Framework (the official repository for hosting the PerimeterX iOS SDK).
   The repository can be integrated with CocoaPods or Carthage.

CocoaPods

Add pod 'PerimeterX' to your Podfile

    source 'https://github.com/CocoaPods/Specs.git'
    platform :ios, '10.0'
    use_frameworks!

    target '<Your App Name>' do
        pod 'PerimeterX'
    end

You can now run pod update and once completed don’t forget to close and reopen your Xcode workspace.

Carthage

Add the following to the app's Cartfile:

    binary "https://raw.githubusercontent.com/PerimeterX/px-iOS-Framework/master/PerimeterX.json"

Then run

    carthage update --platform iOS

2. Once the binary is added to your project, resync the build files to ensure the package is downloaded.
3. The SDK is now installed, and there should not be any build errors when compiling your application.

Adding the PerimeterX Manager Object

1. In your AppDelegate.m file import the PerimeterX library.

    #import <PerimeterX/PerimeterX.h>

2. In your AppDelegate.m file, add the following mandatory methods using the example below.

    -(void) newHeaders:(NSDictionary *)httpHeaders {
        NSLog(@"PXManagerDelegate: newHeaders: %@", httpHeaders);
    }

    -(void) managerReady:(NSDictionary *)httpHeaders {
        NSLog(@"PXManagerDelegate: managerReady: %@", httpHeaders);
    }

• When adding the PXManagerDelegate extension the following two functions are required: managerReady and newHeaders.
• The managerReady is called when the first set of PerimeterX HTTP headers are available.
• Setting the newHeaders is required to ensures that the PXManagerDelegate will notify the application that a refresh to the HTTP headers occurred. This is based on the token validity time set in the PerimeterX portal.
• Action in the newHeaders method is optional. (reference the code example above).

Initializing the PerimeterX Manager

In AppDelegate.m you must now initialize the PXManager object inside the didFinishLaunchingWithOptions handler:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        PXManager *pxManager = [PXManager sharedInstance];
        pxManager.delegate = self;
        [pxManager startWith: @"PX123456"]; // Defines your PerimeterX Application ID

        return YES;
    }

Adding the PerimeterX HTTP Headers to the HTTP Requests

1. Once the PerimeterX Manager is initialized, add PerimeterX HTTP Headers to your network manager headers.
   You are now set to start your requests.
2. The PerimeterX HTTP headers can be retrieved by calling ** [pxManager httpHeaders]** and will return a NSDictionary of type String: String.

Using AFNetworking

To add the PerimeterX HTTP headers to a request using AFNetworking, use the following example:

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager.requestSerializer setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];

    PXManager *pxManager = [PXManager sharedInstance];
    NSDictionary *httpHeaders = [pxManager httpHeaders];
    if (httpHeaders != nil) {
        for (NSString *key in httpHeaders) {
            [manager.requestSerializer setValue: httpHeaders[key] forHTTPHeaderField: key];
        }
    }

    [manager GET:url parameters:nil progress:nil success:^(NSURLSessionTask *task, id responseObject) {
        NSLog(@"Result: %@", responseObject);
    } failure:^(NSURLSessionTask *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];

Managing Requests Denied by PerimeterX

When a HTTP request is denied by PerimeterX a 403 response code is sent in the HTTP response along with a JSON body encoded as a UTF-8 that is parsed and used by the PerimeterX iOS SDK. The parsed JSON is then used to render a WebView to either challenge (with CAPTCHA) the visitor, or block the visitor from continuing in the application. If the user solves the presented challenge they will return to the application. If the user fails the CAPTCHA challenge they continue to be challenged until they pass the verification screen.

Implementing the Error Handler

The PXManager object checks the body of the returned error message by calling [[PXManager sharedInstance] checkError:body] and passing in the body as a NSDictionary. This will return an object type of PXBlockResponse.

You then must pass the returned object to P[[PXManager sharedInstance] handleBlockResponse:blockResponse] to render the correct response. [[PXManager sharedInstance] handleBlockResponse:blockResponse] requires four arguments: PXBlockResponse, UIViewControler, successHandler, failureHandler.

See the example below:

    NSString *url = @"https://perimeterx.example.com/demo/api/";

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager.requestSerializer setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];

    PXManager *pxManager = [PXManager sharedInstance];
    NSDictionary *httpHeaders = [pxManager httpHeaders];
    if (httpHeaders != nil) {
        for (NSString *key in httpHeaders) {
            [manager.requestSerializer setValue: httpHeaders[key] forHTTPHeaderField: key];
        }
    }

    [manager GET:url parameters:nil progress:nil success:^(NSURLSessionTask *task, id responseObject) {
        NSLog(@"Result: %@", responseObject);
    } failure:^(NSURLSessionTask *task, NSError *error) {
        NSLog(@"Error: %@", error);
        NSInteger statusCode = 0;
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)task.response;

        if ([httpResponse isKindOfClass:[NSHTTPURLResponse class]]) {
            statusCode = httpResponse.statusCode;
        }

        if (statusCode == 403) {
            NSData *responseData = error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey];
            NSError* err;
            NSDictionary *bodyJson = [NSJSONSerialization JSONObjectWithData:responseData
                                                                     options:kNilOptions
                                                                       error:&err];

            PXBlockResponse *blockResponse = [[PXManager sharedInstance] checkError:bodyJson];
            if (blockResponse.type == Block || blockResponse.type == Captcha) {
                [[PXManager sharedInstance] handleBlockResponse:blockResponse with:self captchaSuccess:^{
                    NSLog(@"captcha success");
                } captchaFailure:^{
                    NSLog(@"captcha failure");
                    // This callback is for tracking purpose only, there is no action needed here.
                }];
            }
            else {
                NSLog(@"Not a PerimeterX Response");
            }
        }
    }];

Depending on how your application is built, an attacker can be blocked on any network call your application makes. The attacker can be blocked while the application is loading, and the only thing the user sees is the splash screen. The attacker can be in a background thread when the application makes API calls to retrieve a session token or to request data from the server to be presented on the screen.

You can choose what screen to display after the blocked user successfully solves a CAPTCHA challenge. The user can be redirected to their previous activity and retry the network calls that were blocked. The user can be returned to their previous activity and have to repeat the action that was blocked. The user can be redirected to a different screen.

WebView Integration

If your application includes a WebView, it is recommended to connect the application and the web sessions. To do this, pass the cookie _pxmvid with the value of the <glossary:VID> when loading the WebView in the viewDidLoad method.

WebView integration requires PX js client v.3.23 or above.

The <glossary:VID> can be accessed using [PXManager sharedInstance] getVid].

     - (void)viewDidLoad {
        [super viewDidLoad];
        //Set _pxmvid cookie when VID is not nil
        if ([PXManager sharedInstance] getVid]) {
            NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
            [cookieProperties setObject:@"_pxmvid" forKey:NSHTTPCookieName];
            [cookieProperties setObject:[PXManager sharedInstance] getVid] forKey:NSHTTPCookieValue];
            [cookieProperties setObject:@"www.perimeterx.com" forKey:NSHTTPCookieDomain]; //Change according to the required Domain
            [cookieProperties setObject:@"www.perimeterx.com" forKey:NSHTTPCookieOriginURL]; //Change according to the required URL
            [cookieProperties setObject:@"/" forKey:NSHTTPCookiePath];
            [cookieProperties setObject:@"0" forKey:NSHTTPCookieVersion];
            [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:3600] forKey:NSHTTPCookieExpires]; //Set the expiration to one hour

            NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
            [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
        }

        NSString *urlString = @"https://www.perimeterx.com/"; //Replace with your URL
        NSURL *url = [NSURL URLWithString:urlString];
        NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
        [_webView loadRequest:urlRequest];
    }

Adding Custom Parameters

Added in version: v1.4.1

Custom parameters allow you to collect and send specific information, be it device or app related, that may be used later for aggregations and intelligence. Using PXManager's setCustomParametersDictionary() method you can specify up to 10 custom parameters to be sent to PerimeterX servers on every network request.

setCustomParametersDictionary() accepts a NSDictionary of type [String:String] with all the keys begining with custom_param followed by a number (1-10).

It is also important to note that the setCustomParametersDictionary() method is set once inside the didFinishLaunchingWithOptions handler, before calling the start method.

The following example adds 2 custom parameters:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        PXManager *pxManager = [PXManager sharedInstance];
        pxManager.delegate = self;
        [pxManager setCustomParametersDictionary:[NSDictionary dictionaryWithObjectsAndKeys:@"John Bradley",@"custom_param1", @"New York", @"custom_param2", nil]];
        [pxManager startWith: @"PX123456"]; // Defines your PerimeterX Application ID

        return YES;
    }

WebView Integration

Added in version: v1.15.1

If your application includes a WKWebView, you need to allow PerimeterX SDK to handle the session connection between the web view and the application.
This is done automatically by starting the SDK with the PXManager.startWith method.
If your web view needs to handle deprecated TLS connections, make sure to implement webView:authenticationChallenge:shouldAllowDeprecatedTLS delegate method. The current implementation does not allow deprecated TLS versions.

Support Account Defender (From version 1.16.3)

To enable this feature a user ID must be set. That can be done by calling the PXAccountDefenderManager.setUserId function and providing the user ID. When the user ID is changed, the function should be called again with the updated user ID. If the user logged out, the function should be called with nil. This function should be called after the PXManager.startWith function.
To register outgoing URL requests, call the PXAccountDefenderManager.registerOutgoingUrlRequest function with the URL. This function should be called only when Account Defender is enabled (user ID is set).

User Agent Convention

PerimeterX uses the application's user agent to identify and differentiate between application versions. For accurate detection it is important that the user agent your application reports is informative. Here is the recommended convention:

Doctor App

The "Doctor App" is a tool to help you verify the mobile SDK integration by simulating a typical user flow in your application. To enable this feature, add the enableDoctorCheck = true parameter in the start method.

Example:

[PXManager.sharedInstance startWith:@"[YOUR_APP_ID]" enableDoctorCheck:YES];

Flow:

1. Welcome screen: In this screen you select whether to start a new test or load the summary of the previous test, if one exists.
2. Instructions screen: In this screen you get detailed instructions on how the Doctor app works
3. Test selection screen: In this screen you choose which type of test to execute. Options are:
   1. Native app framework - test your native URL requests.
   2. Web view framework - test your web view's URL requests.
      After executing either test, you will return to this screen to be able to execute the other test or to continue and review the test results in the summary screen.
      
4. Summary screen: In this screen you are able to view the results of the executed tests. You can go into details regarding each test and get troubleshooting tips in case a test failed to help you analyze what is causing this issue.
   

Verifying Your Integration

Validating that PXManager is Loaded Properly

Checking the ManagerReady Callback

To verify that SDK is implemented correctly, print a line to the console when the ManagerReady callback is fired.

    -(void) managerReady:(NSDictionary *)httpHeaders {
        NSLog(@"PXManagerDelegate: managerReady: %@", httpHeaders);
    }

A log line similar to the example below should be displayed.

    2017-10-10 15:13:22.536 PX Obj C[64870:23419637] PXManagerDelegate: managerReady: {
        "X-PX-AUTHORIZATION" = "3:497f904bae55a3cca2800da80892a72ba25e5e4beef6798722f0e7743a760b67:pZ98scNgg8mc7LOY74h1uHV1/mybppJORCzop3OSiIbQXnfQI3p12kFMrO+4HuOHt1KD+3oUW8rO+Cvj1kBjag==:1000:7Tonf5zinmI8mX7Y7LynB4pWi56rtqbCp8krXnaeq1TsN07XXeMM9OgnVUmmAq2kEhd0DPDkh+CAVZ+OS0L24cMtlTbJNo0mpbqj9YvAhXwoV2jUT1er9XS+AO1Kq0IERgyaufKQGjwIjXzXVP7zdcG3JuB4m9LyHT1WiWTdLRw=";
    }

Validating that PerimeterX HTTP Headers Are Part of Your Request

Connections to your API endpoint can be inspected using a local proxy such as CharlesProxy_.
When inspecting requests look for the HTTP header named X-PX-AUTHORIZATION.

If this header is not present go back to the application code responsible for the making the request and review to verify the headers were added to the request properly.

Validating Denied Requests

Denied requests will have one of two possible actions, block or challenge, and both should be validated to ensure the request is properly handled.

Console Developer Testing Tools

Developers integrating with the PerimeterX Mobile SDK can be given access to the PerimeterX Portal in a developer role. They then have access to the Developer section, which contains the Mobile Enforcement Verification tool. This tool allows a developer the ability to mark their requests to be denied for testing purposes.
The testing tool is necessary to validate denied requests.

1. Access the tool at https://console.perimeterx.com/botDefender/developer
2. Locate your test device's Visitor ID (<glossary:VID>), and click the <glossary:VID> Extractor button.
   
   This will launch the <glossary:VID> Extractor model:
3. Insert your IP address and click Search. This locates all <glossary:VID>s for your APP ID.
4. Click Select to return to the tool with the App ID and <glossary:VID> fields populated.
   
5. When the App ID and <glossary:VID> are available, you can start validating denied requests.
   

Validating a Challenge Response

To validate a challenge response:

1. Click CAPTCHA in the test tool and wait for the green toast notification to confirm you are ready to continue.
   
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the CAPTCHA WebView.
3. To force a token refresh simply exit and relaunch the application.
4. Solve the challenge presented and verify that you are able to return to the application and continue using it.
   

Validating a Blocking Response

To validate a blocking response:

1. Click Block in the test tool and wait for the green toast notification to confirm you are ready to continue.
   
2. When the next PerimeterX token refresh occurs in your mobile application you will receive the block WebView.
3. To force a token refresh simply relaunch the application. Once you are blocked you cannot continue.
4. To release from blocking, exit the application, click the Clear button, and reload the application to verify that the clean token was received and the application is operating as expected.
   

Appendix

Configuring an iOS Emulator to use Charles Proxy

To configure your iOS Emulator set the HTTP proxy settings on your computer. The emulator will use your computer’s local network connection.

In order to intercept HTTPS requests follow the guidelines at https://www.charlesproxy.com/documentation/using-charles/ssl-certificates/.

Deactivating the PX Mobile Sensor Remotely

In certain cases, the PX Mobile Sensor (SDK) may need to be deactivated remotely, and the app run without any sensor intervention.

This can be done based on any combination of the following parameters:

1. AppID
2. Operating System
3. Operating System Version
4. SDK Version
5. App Version

To deactivate the PX Mobile Sensor, contact your assigned focal point within PerimeterX. Portal support to allow deactivation via the Portal will be added in the future.