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  • 2/21/2015 Secure Your CodeIgniter Application using CSRF Token | Sujit Shah

    http://www.sks.com.np/secure-your-codeigniter-application-using-csrf-token/ 1/6

    Suj i t ShahW e b D e v e l o p e r N e p a l

    Secure Your CodeIgniter Application usingCSRF Token

    October27,2014 byadmin inCodeIgniter

    Inthistutorial,wewilllearnhowtomakeourwebsitemoresecure&protectfromCSRFwhenweareusingCodeIgniterwebapplicationframework.WethanksCodeIgniterteamwhogivinginbuiltsupportCrossSiteRquestForgery(CSRForXSRF).

    ToenableCSRFprotectionCodeIgniterFrameworkwillautomaticallyprotectformsorAJAXcallsfromCSRFwhenweuseformhelperandincustomform,weneedtocallCSRFtokenname&itsvalueinhiddeninputfieldandsendwithPOSTrequests.

    Enable CSRF in Config fileToenableCSRFprotectionweneedtomodifyconfigfileofCodeIgniterFramework.WejustneedtochangeTUREinsteadofFALSEinourapplication/config/config.phpfileforexample:$config['csrf_protection']=TRUE

    AfterchangingourwebapplicationissecurewithCSRFprotection.ButifweusedcustomforminsteadofCodeIgniterformhelperthePOSTrequestwillfailandshowingfollowingerror:

    ItmeansourCSRFprotectionisworking,andweneedtoupdatetheformstoaddaCSFRtokentothePOSTdata.

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  • 2/21/2015 Secure Your CodeIgniter Application using CSRF Token | Sujit Shah

    http://www.sks.com.np/secure-your-codeigniter-application-using-csrf-token/ 2/6

    Used CSRF Tokens using formhelper or ManuallyWehavetwowaytoaddCSRFtokensifwearethinkingtoupdateyourformwithCodeIgniterformhelperclassthenCSRFtokenswillautomaticaddedorifyouarethinkingtoadjustincustomformthenweneedtoaddcustomhiddeninputnameanditsvalue.

    Whenwewilluseformhelperclass:

    UsingformhelperclasswillautomaticallyaddedinputfiledintotheformwitharandomtokenvaluetopreventCSRF.

    Output:

    Whenweusecustomform:

    WeneedtoaddainputfiledtopreventourcustomformwithCSRF.

    Forexample:

  • 2/21/2015 Secure Your CodeIgniter Application using CSRF Token | Sujit Shah

    http://www.sks.com.np/secure-your-codeigniter-application-using-csrf-token/ 3/6

    How to use in AJAX/jQuery CallIfweareusingAJAXinourwebapplicationandtokenisnotpasswithPOSTdatathenCodeIgniterwillreturnaerror500(InternalServerError).ItmeanweneedtousedCSRFtokenalltheformsandpasswiththePOSTdata.TherearemanywaytopassCSRFtokenwithPOSTdataanditsdependsonyoubecausethereareformshelperclasswhichisautomaticallyaddedandcustomfieldwhereweneedtomanuallycodedandcallCSRFtokennameanditsrandomvalue.

    ForExample:

    varcsrf_token=''

    $.post('POSTURL',{data:'value','csrf_test_name':

    csrf_value},function(response){

    //response

    },'json')

    How to use CSRF in AJAX/jQuerySerializationIfyouarethinktousedAJAXSerializationthenyouhaveveryeasyandjustopenandclosedyourformusingformhelperclassofCodeIgniter.

    Forexample:

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  • 2/21/2015 Secure Your CodeIgniter Application using CSRF Token | Sujit Shah

    http://www.sks.com.np/secure-your-codeigniter-application-using-csrf-token/ 4/6

    Previous

    $.post(ajax_url,$('#login).serialize(),function(response

    ){

    //response

    },'json')

    Disable CSRF for Third Party APIWhenweareusingThirdPartyAPIorFacebookAPI/TwitterAPIinourwebsiteapplicationthenweneedtodisableCSRFprotectionintheresponsecontrollerorfunction(method).Forthisweneedtodisableourcontrollerorfunctiononly,

    Forexample:

    if(isset($_SERVER["REQUEST_URI"])){

    if(stripos($_SERVER["REQUEST_URI"],'/ajax/')===

    FALSEAND#allajaxcontrollers

    stripos($_SERVER["REQUEST_URI"],'/facebook_app/)

    ===FALSEAND#allfacebookcontrollers

    stripos($_SERVER["REQUEST_URI"],'/twitter_app/login')

    ===FALSEAND#onlyloginfunction

    ){

    $config['csrf_protection']=TRUE

    }else{

    $config['csrf_protection']=FALSE

    }

    }else{

    $config['csrf_protection']=TRUE

    }

    Tags: CodeIgniter CodeIgniterFramework CSRFinAJAX/jQuery

    CSRFToken HowtouseCSRFToken? ThirdPartyAPI

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  • 2/21/2015 Secure Your CodeIgniter Application using CSRF Token | Sujit Shah

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