Amazon-cognito-identity-js: React Native

[npalethorpe]

So I had been using this JS library in a Cordova/Angular project for almost a year now (I'm really impressed with how well maintained it is compared to the other AWS repositories) but realised the other week that Cordova couldn't cut it for what we want - so after much deliberation I have decided to recode our project using React-Native; but we need to still be able to use this library to allow users to sign up/in.

My question is - is there a way I can get this cognito library to work with my new React Native project? I know there is use of localStorage within the library and I'm unsure how the likes of that will transfer over to React Native?

I've been racking the internet for days now trying to figure out how I could integrate it, I've read a good amount about Webpack; but in all honesty I'm a little confused as to what that actually does!

If someone could give me a step by step I would be very grateful. Thank you.

[gitjeff05]

I've also been considering this in regards to react native. I was thinking I'd have to use aws-sdk-ios/AWSCognito and aws-sdk-android/aws-android-sdk-cognito. However, from what I gather about RN, you can use web views when you want and native views for other parts of your app depending on the device. I'm not sure about localStorage and the other dependencies for the js sdk. The React Docs refer to AsyncStorage and say that it should be used in place of LocalStorage. I would just try a simple app and see if it works.

[itrestian]

Just to mention that at this point we don't have a dependency on local storage any more. If it is not available, we default to in memory storage. We haven't tried a react native solution, however there are definitely users that successfully implemented such solutions.

[npalethorpe]

Just to keep anyone interested as to my progress (I'm completely new to this npm module way of doing things) but so far I have managed the following:

Integrating the AWS JS SDK:
Luckily some smart chaps have built up a model that works well with React Native so you can install that easy using the following:
npm install git://github.com/aws/aws-sdk-js.git#react-native --save
then you just need to include in your project using
var AWS = require('aws-sdk/dist/aws-sdk-react-native');

Adding in the AWS Cognito SDK
This library seemed to integrate without issue, just require the library from your js page.
var AWSCognito = require('./lib/aws-cognito-sdk.min.js');

The problem one I'm currently having issue with is the amazon-cognito-identity.min.js library. I just can't seem to get it happy! Including this library seems to knock out the AWS JS library where the service.js file doesn't manage to require the ./core file successfully causing the var inherit = AWS.util.inherit; to produce a 'Cannot read property 'inherit' of undefined'...

So I'm at a bit of a loss at the moment. I'll update as to any progression I manage to make

[npalethorpe]

Ok so after much tearing out of hair and pretty much no sleep, I have something working in React Native - I feel I've likely somehow made life harder for myself in a lot of ways but what I have works and I'd like to share with anyone who is interested.

So the steps I took to get it all working (and I apologise if I miss anything off, it became hard to keep track of what I was changing and unchanging!)

1. Install the React Native branch of the AWS JS SDK, this can be done by navigating to the root of your project directory within a terminal window and running the following:
   npm install git://github.com/aws/aws-sdk-js.git#react-native --save
   (the --save will add it to your package.json file so you can reinstall quicker)

2. Get hold of the amazon-cognito-identity.min.js js file from https://raw.githubusercontent.com/aws/amazon-cognito-identity-js/master/dist/amazon-cognito-identity.min.js and place it somewhere you can reference within your project (I find a 'lib' folder always does the trick).

At this point whilst trying to _require()_ the amazon-cognito-identity file I was getting a _util of undefined_ error; I'm not 100% sure of what was causing it - I think it was a circular reference somewhere but after days of diving through code I got no where and I wasn't about to recode a library which clearly works... so - I realised (rightly or wrongly) that it seemed to be aiming toward the standard version of the AWS SDK, not the React Native version we just installed. So I made the following modification to the amazon-cognito-identity.min.js file...

1. To make life easier, beautify the cognito script (you can minify it again after if you want). You will see the first function within the script looks like the following

"object" == typeof exports && "object" == typeof module ? module.exports = t(require("aws-sdk/global"), require("aws-sdk/clients/cognitoidentityserviceprovider")) : "function" == typeof define && define.amd ? define(["aws-sdk/global", "aws-sdk/clients/cognitoidentityserviceprovider"], t) : "object" == typeof exports ? exports.AmazonCognitoIdentity = t(require("aws-sdk/global"), require("aws-sdk/clients/cognitoidentityserviceprovider")) : e.AmazonCognitoIdentity = t(e.AWSCognito, e.AWSCognito.CognitoIdentityServiceProvider)

1. I replaced that code with the following...

var AWS = require('aws-sdk/dist/aws-sdk-react-native'), CognitoIdentityServiceProvider = AWS.CognitoIdentityServiceProvider; "object" == typeof exports && "object" == typeof module ? module.exports = t(AWS, CognitoIdentityServiceProvider) : "function" == typeof define && define.amd ? define([AWS, CognitoIdentityServiceProvider], t) : "object" == typeof exports ? exports.AmazonCognitoIdentity = t(AWS, CognitoIdentityServiceProvider) : e.AmazonCognitoIdentity = t(e.AWSCognito, e.AWSCognito.CognitoIdentityServiceProvider)

What we are doing here is simply replacing the original reference to AWS-SDK with our react native version. This script will then add on all our Cognito special function within this AWS namespace.

1. At this point its really up to you as to how you bring this into your project, personally it suited my project model well by just creating a single js file (I called cognitoLib) which held all my cognito code. At the top of this file you just need to include the following two lines to bring the AWS Cognito functions to life
   var AWS = require('aws-sdk/dist/aws-sdk-react-native');
require('./amazon-cognito-identity.min.js');

Just for example purposes below is a very slimmed down aforementioned cognitoLib file I've built for my project, just so you can see how I've worked it in, I then just do a var cognitoLib = require('../lib/cognitoLib'); on whichever scripts I want to access the Cognito functionality on.

/*
    This library is a combination of all Cognito functions in a single class
    The single class is to avoid having circular dependancies through requireing
*/

var AWS = require('aws-sdk/dist/aws-sdk-react-native');
require('./amazon-cognito-identity.min.js');

export const Response = {
    SUCCESS: 1,
    FAILED: 2,
    UNKNOWN_ERROR: 3,
    USER_NOT_CONFIRMED: 4,
    RESET_PASSWORD_REQUIRED: 5,
    USER_NOT_FOUND: 6,
    INCORRECT_PASSWORD: 7,
    INVALID_USERNAME: 8,
    INVALID_PASSWORD: 9,
    FAILED_TO_GET_SESSION: 10,
    FAILED_REGISTRATION: 11,
    PERCENTAGE_INCREASED: 12,
    INVALID_FILE: 13,
    MISSING_CONFIRMATION_CODE: 14,
    PERMISSION_NOT_GRANTED: 15,
    NO_RECORDS_FOUND: 16
};


export const CognitoUtil = {

    REGION: "",
    IDENTITY_POOL_ID: "",
    USER_POOL_ID: "",
    CLIENT_ID: "",
    POOL_DATA: function(){
        return {
            UserPoolId: CognitoUtil.USER_POOL_ID,
            ClientId: CognitoUtil.CLIENT_ID
        };
    },
    getUserPool: function(){
        console.log('Pool Data: ' + JSON.stringify(CognitoUtil.POOL_DATA()));
    },
    getCurrentUser: function(){
        console.log('Getting Current User');
    },
    getAccessToken: function(callback){
        console.log('Getting Access Token');
    },
    getIdToken: function(callback){
        console.log('Getting ID Token');
    },
    getRefreshToken: function(callback){
        console.log('Getting Refresh Token');
    }
};


export const CognitoUserLogin = {

    authenticate: function(username, password, callback){
        console.log('Authenticating user: ' + username + ' pass: ' + password);
    },
    logout: function(){
        console.log('Logging out');
    },
    isAuthenticated: function(callback){
        console.log('cognitoUserLogin: Checking if user isAuthenticated');
    }
};

Really hope this helps someone out. I appreciate it's likely being done using some bad practises and I'm more than likely misunderstanding a thing or two so if anyone has any better solutions I'm all ears! :)

[npalethorpe]

@itrestian I wonder if you might be able to shed some light on a new issue I'm now experiencing - the functions appear to working great, however the session doesn't appear to be saved in storage, so on a rebuild I get thrown back to my login screen! (at least I know that mechanism works!)

You mentioned that you default to memory storage? Could you elaborate as to what memory storage it tries to use? I see no mention of AsyncStorage in the amazon-cognito-identity-js script and I'm wondering if I need to hack something in to get it to use AsyncStorage?

[itrestian]

Yes, that's what happens

https://github.com/aws/amazon-cognito-identity-js/blob/master/src/StorageHelper.js#L58

I think you would have to hack something together to persist the tokens.

[npalethorpe]

Ok, so took me a little time to understand that async functions required all parents to also async otherwise you just get a Promise object back rather than the required result - but I got there in the end! Below is the minified version of the script which uses AsyncStorage (along with all the above code changes too). I should note that I have completely removed localStorage support.

I'll keep updating with any bug fixes I find myself running into.

@itrestian - I'm not sure planting all this code in this thread is the correct way to share this code? Should I start a new personal repository to hold this in or should it be a new branch in this repository?

amazon-cognito-identity-react-native.min.js:

import{AsyncStorage}from 'react-native';!function(e,t){var AWS=require('aws-sdk/dist/aws-sdk-react-native'),CognitoIdentityServiceProvider=AWS.CognitoIdentityServiceProvider;"object"==typeof exports&&"object"==typeof module?module.exports=t(AWS,CognitoIdentityServiceProvider):"function"==typeof define&&define.amd?define([AWS,CognitoIdentityServiceProvider],t):"object"==typeof exports?exports.AmazonCognitoIdentity=t(AWS,CognitoIdentityServiceProvider):e.AmazonCognitoIdentity=t(e.AWSCognito,e.AWSCognito.CognitoIdentityServiceProvider)}(this,function(e,t){return function(e){function t(i){if(n[i])return n[i].exports;var s=n[i]={exports:{},id:i,loaded:!1};return e[i].call(s.exports,s,s.exports,t),s.loaded=!0,s.exports}
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function b(e,t){for(var n=0,i=0,s=Math.min(e.t,this.t);n<s;)i+=this[n]+e[n],t[n++]=i&this.DM,i>>=this.DB;if(e.t<this.t){for(i+=e.s;n<this.t;)i+=this[n],t[n++]=i&this.DM,i>>=this.DB;i+=this.s}else{for(i+=this.s;n<e.t;)i+=e[n],t[n++]=i&this.DM,i>>=this.DB;i+=e.s}
t.s=i<0?-1:0,i>0?t[n++]=i:i<-1&&(t[n++]=this.DV+i),t.t=n,t.clamp()}
function P(e){var t=i();return this.addTo(e,t),t}
function R(e){var t=i();return this.subTo(e,t),t}
function F(e){var t=i();return this.multiplyTo(e,t),t}
function _(e){var t=i();return this.divRemTo(e,t,null),t}
function B(e){this.m=e,this.mp=e.invDigit(),this.mpl=32767&this.mp,this.mph=this.mp>>15,this.um=(1<<e.DB-15)-1,this.mt2=2*e.t}
function O(e){var t=i();return e.abs().dlShiftTo(this.m.t,t),t.divRemTo(this.m,null,t),e.s<0&&t.compareTo(n.ZERO)>0&&this.m.subTo(t,t),t}
function M(e){var t=i();return e.copyTo(t),this.reduce(t),t}
function N(e){for(;e.t<=this.mt2;)e[e.t++]=0;for(var t=0;t<this.m.t;++t){var n=32767&e[t],i=n*this.mpl+((n*this.mph+(e[t]>>15)*this.mpl&this.um)<<15)&e.DM;for(n=t+this.m.t,e[n]+=this.m.am(0,i,e,t,0,this.m.t);e[n]>=e.DV;)e[n]-=e.DV,e[++n]++}
e.clamp(),e.drShiftTo(this.m.t,e),e.compareTo(this.m)>=0&&e.subTo(this.m,e)}
function V(e,t){e.squareTo(t),this.reduce(t)}
function K(e,t,n){e.multiplyTo(t,n),this.reduce(n)}
function q(e,t){var n,s=e.bitLength(),r=l(1),o=new B(t);if(s<=0)return r;n=s<18?1:s<48?3:s<144?4:s<768?5:6;var a=new Array,u=3,c=n-1,h=(1<<n)-1;if(a[1]=o.convert(this),n>1){var f=i();for(o.sqrTo(a[1],f);u<=h;)a[u]=i(),o.mulTo(f,a[u-2],a[u]),u+=2}
var d,v,g=e.t-1,p=!0,y=i();for(s=m(e[g])-1;g>=0;){for(s>=c?d=e[g]>>s-c&h:(d=(e[g]&(1<<s+1)-1)<<c-s,g>0&&(d|=e[g-1]>>this.DB+s-c)),u=n;0==(1&d);)d>>=1,--u;if((s-=u)<0&&(s+=this.DB,--g),p)a[d].copyTo(r),p=!1;else{for(;u>1;)o.sqrTo(r,y),o.sqrTo(y,r),u-=2;u>0?o.sqrTo(r,y):(v=r,r=y,y=v),o.mulTo(y,a[d],r)}
for(;g>=0&&0==(e[g]&1<<s);)o.sqrTo(r,y),v=r,r=y,y=v,--s<0&&(s=this.DB-1,--g)}
return o.revert(r)}
Object.defineProperty(t,"__esModule",{value:!0}),t.default=n,n.prototype.am=s;var j=26;n.prototype.DB=j,n.prototype.DM=(1<<j)-1,n.prototype.DV=1<<j;var x=52;n.prototype.FV=Math.pow(2,x),n.prototype.F1=x-j,n.prototype.F2=2*j-x;var H,L,J="0123456789abcdefghijklmnopqrstuvwxyz",G=new Array;for(H="0".charCodeAt(0),L=0;L<=9;++L)G[H++]=L;for(H="a".charCodeAt(0),L=10;L<36;++L)G[H++]=L;for(H="A".charCodeAt(0),L=10;L<36;++L)G[H++]=L;B.prototype.convert=O,B.prototype.revert=M,B.prototype.reduce=N,B.prototype.mulTo=K,B.prototype.sqrTo=V,n.prototype.copyTo=a,n.prototype.fromInt=u,n.prototype.fromString=c,n.prototype.clamp=h,n.prototype.dlShiftTo=y,n.prototype.drShiftTo=S,n.prototype.lShiftTo=C,n.prototype.rShiftTo=w,n.prototype.subTo=k,n.prototype.multiplyTo=A,n.prototype.squareTo=T,n.prototype.divRemTo=U,n.prototype.invDigit=D,n.prototype.addTo=b,n.prototype.toString=f,n.prototype.negate=d,n.prototype.abs=v,n.prototype.compareTo=g,n.prototype.bitLength=p,n.prototype.mod=E,n.prototype.equals=I,n.prototype.add=P,n.prototype.subtract=R,n.prototype.multiply=F,n.prototype.divide=_,n.prototype.modPow=q,n.ZERO=l(0),n.ONE=l(1)},function(e,t,n){"use strict";function i(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}
Object.defineProperty(t,"__esModule",{value:!0});var s=function(){function e(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value" in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}
return function(t,n,i){return n&&e(t.prototype,n),i&&e(t,i),t}}(),r=n(1),o=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=t.AccessToken;i(this,e),this.jwtToken=n||""}
return s(e,[{key:"getJwtToken",value:function(){return this.jwtToken}},{key:"getExpiration",value:function(){var e=this.jwtToken.split(".")[1],t=JSON.parse(r.util.base64.decode(e).toString("utf8"));return t.exp}}]),e}();t.default=o},function(e,t,n){"use strict";function i(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}
Object.defineProperty(t,"__esModule",{value:!0});var s=function(){function e(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value" in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}
return function(t,n,i){return n&&e(t.prototype,n),i&&e(t,i),t}}(),r=n(1),o=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=t.IdToken;i(this,e),this.jwtToken=n||""}
return s(e,[{key:"getJwtToken",value:function(){return this.jwtToken}},{key:"getExpiration",value:function(){var e=this.jwtToken.split(".")[1],t=JSON.parse(r.util.base64.decode(e).toString("utf8"));return t.exp}}]),e}();t.default=o},function(e,t){"use strict";function n(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}
Object.defineProperty(t,"__esModule",{value:!0});var i=function(){function e(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value" in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}
return function(t,n,i){return n&&e(t.prototype,n),i&&e(t,i),t}}(),s=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},i=t.RefreshToken;n(this,e),this.token=i||""}
return i(e,[{key:"getToken",value:function(){return this.token}}]),e}();t.default=s},function(e,t,n){"use strict";function i(e){return e&&e.__esModule?e:{default:e}}
function s(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}
Object.defineProperty(t,"__esModule",{value:!0});var r=function(){function e(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value" in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}
return function(t,n,i){return n&&e(t.prototype,n),i&&e(t,i),t}}(),o=n(1),a=n(3),u=i(a),l=n(2),c=i(l),h=n(4),f=i(h),d=n(5),v=i(d),g=n(6),m=i(g),p=n(9),y=i(p),S=n(10),C=i(S),w=n(8),k=i(w),A=n(11),T=i(A),U=function(){function e(t){if(s(this,e),null==t||null==t.Username||null==t.Pool)throw new Error("Username and pool information are required.");this.username=t.Username||"",this.pool=t.Pool,this.Session=null,this.client=t.Pool.client,this.signInUserSession=null,this.authenticationFlowType="USER_SRP_AUTH",this.storage=(new T.default).getStorage()}
return r(e,[{key:"getSignInUserSession",value:function(){return this.signInUserSession}},{key:"getUsername",value:function(){return this.username}},{key:"getAuthenticationFlowType",value:function(){return this.authenticationFlowType}},{key:"setAuthenticationFlowType",value:function(e){this.authenticationFlowType=e}},{key:"authenticateUser",value:function(e,t){var n=this,i=new c.default(this.pool.getUserPoolId().split("_")[1]),s=new C.default,r=void 0,a=void 0,l={};null!=this.deviceKey&&(l.DEVICE_KEY=this.deviceKey),l.USERNAME=this.username,l.SRP_A=i.getLargeAValue().toString(16),"CUSTOM_AUTH"===this.authenticationFlowType&&(l.CHALLENGE_NAME="SRP_A"),this.client.makeUnauthenticatedRequest("initiateAuth",{AuthFlow:this.authenticationFlowType,ClientId:this.pool.getClientId(),AuthParameters:l,ClientMetadata:e.getValidationData()},function(l,c){if(l)return t.onFailure(l);var h=c.ChallengeParameters;n.username=h.USER_ID_FOR_SRP,r=new u.default(h.SRP_B,16),a=new u.default(h.SALT,16),n.getCachedDeviceKeyAndPassword();var f=i.getPasswordAuthenticationKey(n.username,e.getPassword(),r,a),d=s.getNowString(),v=o.util.crypto.hmac(f,o.util.buffer.concat([new o.util.Buffer(n.pool.getUserPoolId().split("_")[1],"utf8"),new o.util.Buffer(n.username,"utf8"),new o.util.Buffer(h.SECRET_BLOCK,"base64"),new o.util.Buffer(d,"utf8")]),"base64","sha256"),g={};g.USERNAME=n.username,g.PASSWORD_CLAIM_SECRET_BLOCK=h.SECRET_BLOCK,g.TIMESTAMP=d,g.PASSWORD_CLAIM_SIGNATURE=v,null!=n.deviceKey&&(g.DEVICE_KEY=n.deviceKey);var m=function e(t,i){return n.client.makeUnauthenticatedRequest("respondToAuthChallenge",t,function(s,r){return s&&"ResourceNotFoundException"===s.code&&s.message.toLowerCase().indexOf("device")!==-1?(g.DEVICE_KEY=null,n.deviceKey=null,n.randomPassword=null,n.deviceGroupKey=null,n.clearCachedDeviceKeyAndPassword(),e(t,i)):i(s,r)})};m({ChallengeName:"PASSWORD_VERIFIER",ClientId:n.pool.getClientId(),ChallengeResponses:g,Session:c.Session},function(e,s){if(e)return t.onFailure(e);var r=s.ChallengeName;if("NEW_PASSWORD_REQUIRED"===r){n.Session=s.Session;var o=null,a=null,u=[],l=i.getNewPasswordRequiredChallengeUserAttributePrefix();if(s.ChallengeParameters&&(o=JSON.parse(s.ChallengeParameters.userAttributes),a=JSON.parse(s.ChallengeParameters.requiredAttributes)),a)
for(var c=0;c<a.length;c++)u[c]=a[c].substr(l.length);return t.newPasswordRequired(o,u)}
return n.authenticateUserInternal(s,i,t)})})}},{key:"authenticateUserInternal",value:function(e,t,n){var i=this,s=e.ChallengeName,r=e.ChallengeParameters;if("SMS_MFA"===s)return this.Session=e.Session,n.mfaRequired(s,r);if("CUSTOM_CHALLENGE"===s)return this.Session=e.Session,n.customChallenge(r);if("DEVICE_SRP_AUTH"===s)return void this.getDeviceResponse(n);this.signInUserSession=this.getCognitoUserSession(e.AuthenticationResult),this.cacheTokens();var a=e.AuthenticationResult.NewDeviceMetadata;if(null==a)return n.onSuccess(this.signInUserSession);t.generateHashDevice(e.AuthenticationResult.NewDeviceMetadata.DeviceGroupKey,e.AuthenticationResult.NewDeviceMetadata.DeviceKey);var u={Salt:new o.util.Buffer(t.getSaltDevices(),"hex").toString("base64"),PasswordVerifier:new o.util.Buffer(t.getVerifierDevices(),"hex").toString("base64")};this.verifierDevices=u.PasswordVerifier,this.deviceGroupKey=a.DeviceGroupKey,this.randomPassword=t.getRandomPassword(),this.client.makeUnauthenticatedRequest("confirmDevice",{DeviceKey:a.DeviceKey,AccessToken:this.signInUserSession.getAccessToken().getJwtToken(),DeviceSecretVerifierConfig:u,DeviceName:navigator.userAgent},function(t,s){return t?n.onFailure(t):(i.deviceKey=e.AuthenticationResult.NewDeviceMetadata.DeviceKey,i.cacheDeviceKeyAndPassword(),s.UserConfirmationNecessary===!0?n.onSuccess(i.signInUserSession,s.UserConfirmationNecessary):n.onSuccess(i.signInUserSession))})}},{key:"completeNewPasswordChallenge",value:function(e,t,n){var i=this;if(!e)return n.onFailure(new Error("New password is required."));var s=new c.default(this.pool.getUserPoolId().split("_")[1]),r=s.getNewPasswordRequiredChallengeUserAttributePrefix(),o={};t&&Object.keys(t).forEach(function(e){o[r+e]=t[e]}),o.NEW_PASSWORD=e,o.USERNAME=this.username,this.client.makeUnauthenticatedRequest("respondToAuthChallenge",{ChallengeName:"NEW_PASSWORD_REQUIRED",ClientId:this.pool.getClientId(),ChallengeResponses:o,Session:this.Session},function(e,t){return e?n.onFailure(e):i.authenticateUserInternal(t,s,n)})}},{key:"getDeviceResponse",value:function(e){var t=this,n=new c.default(this.deviceGroupKey),i=new C.default,s={};s.USERNAME=this.username,s.DEVICE_KEY=this.deviceKey,s.SRP_A=n.getLargeAValue().toString(16),this.client.makeUnauthenticatedRequest("respondToAuthChallenge",{ChallengeName:"DEVICE_SRP_AUTH",ClientId:this.pool.getClientId(),ChallengeResponses:s},function(s,r){if(s)return e.onFailure(s);var a=r.ChallengeParameters,l=new u.default(a.SRP_B,16),c=new u.default(a.SALT,16),h=n.getPasswordAuthenticationKey(t.deviceKey,t.randomPassword,l,c),f=i.getNowString(),d=o.util.crypto.hmac(h,o.util.buffer.concat([new o.util.Buffer(t.deviceGroupKey,"utf8"),new o.util.Buffer(t.deviceKey,"utf8"),new o.util.Buffer(a.SECRET_BLOCK,"base64"),new o.util.Buffer(f,"utf8")]),"base64","sha256"),v={};v.USERNAME=t.username,v.PASSWORD_CLAIM_SECRET_BLOCK=a.SECRET_BLOCK,v.TIMESTAMP=f,v.PASSWORD_CLAIM_SIGNATURE=d,v.DEVICE_KEY=t.deviceKey,t.client.makeUnauthenticatedRequest("respondToAuthChallenge",{ChallengeName:"DEVICE_PASSWORD_VERIFIER",ClientId:t.pool.getClientId(),ChallengeResponses:v,Session:r.Session},function(n,i){return n?e.onFailure(n):(t.signInUserSession=t.getCognitoUserSession(i.AuthenticationResult),t.cacheTokens(),e.onSuccess(t.signInUserSession))})})}},{key:"confirmRegistration",value:function(e,t,n){this.client.makeUnauthenticatedRequest("confirmSignUp",{ClientId:this.pool.getClientId(),ConfirmationCode:e,Username:this.username,ForceAliasCreation:t},function(e){return e?n(e,null):n(null,"SUCCESS")})}},{key:"sendCustomChallengeAnswer",value:function(e,t){var n=this,i={};i.USERNAME=this.username,i.ANSWER=e,this.client.makeUnauthenticatedRequest("respondToAuthChallenge",{ChallengeName:"CUSTOM_CHALLENGE",ChallengeResponses:i,ClientId:this.pool.getClientId(),Session:this.Session},function(e,i){if(e)return t.onFailure(e);var s=i.ChallengeName;return "CUSTOM_CHALLENGE"===s?(n.Session=i.Session,t.customChallenge(i.ChallengeParameters)):(n.signInUserSession=n.getCognitoUserSession(i.AuthenticationResult),n.cacheTokens(),t.onSuccess(n.signInUserSession))})}},{key:"sendMFACode",value:function(e,t){var n=this,i={};i.USERNAME=this.username,i.SMS_MFA_CODE=e,null!=this.deviceKey&&(i.DEVICE_KEY=this.deviceKey),this.client.makeUnauthenticatedRequest("respondToAuthChallenge",{ChallengeName:"SMS_MFA",ChallengeResponses:i,ClientId:this.pool.getClientId(),Session:this.Session},function(e,i){if(e)return t.onFailure(e);var s=i.ChallengeName;if("DEVICE_SRP_AUTH"===s)return void n.getDeviceResponse(t);if(n.signInUserSession=n.getCognitoUserSession(i.AuthenticationResult),n.cacheTokens(),null==i.AuthenticationResult.NewDeviceMetadata)return t.onSuccess(n.signInUserSession);var r=new c.default(n.pool.getUserPoolId().split("_")[1]);r.generateHashDevice(i.AuthenticationResult.NewDeviceMetadata.DeviceGroupKey,i.AuthenticationResult.NewDeviceMetadata.DeviceKey);var a={Salt:new o.util.Buffer(r.getSaltDevices(),"hex").toString("base64"),PasswordVerifier:new o.util.Buffer(r.getVerifierDevices(),"hex").toString("base64")};n.verifierDevices=a.PasswordVerifier,n.deviceGroupKey=i.AuthenticationResult.NewDeviceMetadata.DeviceGroupKey,n.randomPassword=r.getRandomPassword(),n.client.makeUnauthenticatedRequest("confirmDevice",{DeviceKey:i.AuthenticationResult.NewDeviceMetadata.DeviceKey,AccessToken:n.signInUserSession.getAccessToken().getJwtToken(),DeviceSecretVerifierConfig:a,DeviceName:navigator.userAgent},function(e,s){return e?t.onFailure(e):(n.deviceKey=i.AuthenticationResult.NewDeviceMetadata.DeviceKey,n.cacheDeviceKeyAndPassword(),s.UserConfirmationNecessary===!0?t.onSuccess(n.signInUserSession,s.UserConfirmationNecessary):t.onSuccess(n.signInUserSession))})})}},{key:"changePassword",value:function(e,t,n){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("changePassword",{PreviousPassword:e,ProposedPassword:t,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(e){return e?n(e,null):n(null,"SUCCESS")}):n(new Error("User is not authenticated"),null)}},{key:"enableMFA",value:function(e){if(null==this.signInUserSession||!this.signInUserSession.isValid())return e(new Error("User is not authenticated"),null);var t=[],n={DeliveryMedium:"SMS",AttributeName:"phone_number"};t.push(n),this.client.makeUnauthenticatedRequest("setUserSettings",{MFAOptions:t,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(t){return t?e(t,null):e(null,"SUCCESS")})}},{key:"disableMFA",value:function(e){if(null==this.signInUserSession||!this.signInUserSession.isValid())return e(new Error("User is not authenticated"),null);var t=[];this.client.makeUnauthenticatedRequest("setUserSettings",{MFAOptions:t,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(t){return t?e(t,null):e(null,"SUCCESS")})}},{key:"deleteUser",value:function(e){var t=this;return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("deleteUser",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(n){return n?e(n,null):(t.clearCachedTokens(),e(null,"SUCCESS"))}):e(new Error("User is not authenticated"),null)}},{key:"updateAttributes",value:function(e,t){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("updateUserAttributes",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken(),UserAttributes:e},function(e){return e?t(e,null):t(null,"SUCCESS")}):t(new Error("User is not authenticated"),null)}},{key:"getUserAttributes",value:function(e){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("getUser",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(t,n){if(t)return e(t,null);for(var i=[],s=0;s<n.UserAttributes.length;s++){var r={Name:n.UserAttributes[s].Name,Value:n.UserAttributes[s].Value},o=new k.default(r);i.push(o)}
return e(null,i)}):e(new Error("User is not authenticated"),null)}},{key:"getMFAOptions",value:function(e){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("getUser",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(t,n){return t?e(t,null):e(null,n.MFAOptions)}):e(new Error("User is not authenticated"),null)}},{key:"deleteAttributes",value:function(e,t){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("deleteUserAttributes",{UserAttributeNames:e,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(e){return e?t(e,null):t(null,"SUCCESS")}):t(new Error("User is not authenticated"),null)}},{key:"resendConfirmationCode",value:function(e){this.client.makeUnauthenticatedRequest("resendConfirmationCode",{ClientId:this.pool.getClientId(),Username:this.username},function(t){return t?e(t,null):e(null,"SUCCESS")})}},{key:"getSession",value:async function(e){if(null==this.username)return e(new Error("Username is null. Cannot retrieve a new session"),null);if(null!=this.signInUserSession&&this.signInUserSession.isValid())return e(null,this.signInUserSession);var t="CognitoIdentityServiceProvider."+this.pool.getClientId()+"."+this.username,n=t+".idToken",i=t+".accessToken",s=t+".refreshToken";if(await this.storage.getItem(n)){var r=new v.default({IdToken:await this.storage.getItem(n)}),o=new f.default({AccessToken:await this.storage.getItem(i)}),a=new m.default({RefreshToken:await this.storage.getItem(s)}),u={IdToken:r,AccessToken:o,RefreshToken:a},l=new y.default(u);if(l.isValid())return this.signInUserSession=l,e(null,this.signInUserSession);if(null==a.getToken())return e(new Error("Cannot retrieve a new session. Please authenticate."),null);this.refreshSession(a,e)}else e(new Error("Local storage is missing an ID Token, Please authenticate"),null)}},{key:"refreshSession",value:async function(e,t){var n=this,i={};i.REFRESH_TOKEN=e.getToken();var s="CognitoIdentityServiceProvider."+this.pool.getClientId(),r=s+".LastAuthUser";if(await this.storage.getItem(r)){this.username=await this.storage.getItem(r);var o=s+"."+this.username+".deviceKey";this.deviceKey=await this.storage.getItem(o),i.DEVICE_KEY=this.deviceKey}
this.client.makeUnauthenticatedRequest("initiateAuth",{ClientId:this.pool.getClientId(),AuthFlow:"REFRESH_TOKEN_AUTH",AuthParameters:i},function(i,s){if(i)return "NotAuthorizedException"===i.code&&n.clearCachedTokens(),t(i,null);if(s){var r=s.AuthenticationResult;return Object.prototype.hasOwnProperty.call(r,"RefreshToken")||(r.RefreshToken=e.getToken()),n.signInUserSession=n.getCognitoUserSession(r),n.cacheTokens(),t(null,n.signInUserSession)}})}},{key:"cacheTokens",value:async function(){var e="CognitoIdentityServiceProvider."+this.pool.getClientId(),t=e+"."+this.username+".idToken",n=e+"."+this.username+".accessToken",i=e+"."+this.username+".refreshToken",s=e+".LastAuthUser";await this.storage.setItem(t,this.signInUserSession.getIdToken().getJwtToken()),await this.storage.setItem(n,this.signInUserSession.getAccessToken().getJwtToken()),await this.storage.setItem(i,this.signInUserSession.getRefreshToken().getToken()),await this.storage.setItem(s,this.username)}},{key:"cacheDeviceKeyAndPassword",value:async function(){var e="CognitoIdentityServiceProvider."+this.pool.getClientId()+"."+this.username,t=e+".deviceKey",n=e+".randomPasswordKey",i=e+".deviceGroupKey";await this.storage.setItem(t,this.deviceKey),await this.storage.setItem(n,this.randomPassword),await this.storage.setItem(i,this.deviceGroupKey)}},{key:"getCachedDeviceKeyAndPassword",value:async function(){var e="CognitoIdentityServiceProvider."+this.pool.getClientId()+"."+this.username,t=e+".deviceKey",n=e+".randomPasswordKey",i=e+".deviceGroupKey";await this.storage.getItem(t)&&(this.deviceKey=await this.storage.getItem(t),this.randomPassword=await this.storage.getItem(n),this.deviceGroupKey=await this.storage.getItem(i))}},{key:"clearCachedDeviceKeyAndPassword",value:async function(){var e="CognitoIdentityServiceProvider."+this.pool.getClientId()+"."+this.username,t=e+".deviceKey",n=e+".randomPasswordKey",i=e+".deviceGroupKey";await this.storage.removeItem(t),await this.storage.removeItem(n),await this.storage.removeItem(i)}},{key:"clearCachedTokens",value:async function(){var e="CognitoIdentityServiceProvider."+this.pool.getClientId(),t=e+"."+this.username+".idToken",n=e+"."+this.username+".accessToken",i=e+"."+this.username+".refreshToken",s=e+".LastAuthUser";await this.storage.removeItem(t),await this.storage.removeItem(n),await this.storage.removeItem(i),await this.storage.removeItem(s)}},{key:"getCognitoUserSession",value:function(e){var t=new v.default(e),n=new f.default(e),i=new m.default(e),s={IdToken:t,AccessToken:n,RefreshToken:i};return new y.default(s)}},{key:"forgotPassword",value:function(e){this.client.makeUnauthenticatedRequest("forgotPassword",{ClientId:this.pool.getClientId(),Username:this.username},function(t,n){return t?e.onFailure(t):"function"==typeof e.inputVerificationCode?e.inputVerificationCode(n):e.onSuccess()})}},{key:"confirmPassword",value:function(e,t,n){this.client.makeUnauthenticatedRequest("confirmForgotPassword",{ClientId:this.pool.getClientId(),Username:this.username,ConfirmationCode:e,Password:t},function(e){return e?n.onFailure(e):n.onSuccess()})}},{key:"getAttributeVerificationCode",value:function(e,t){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("getUserAttributeVerificationCode",{AttributeName:e,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(e,n){return e?t.onFailure(e):t.inputVerificationCode(n)}):t.onFailure(new Error("User is not authenticated"))}},{key:"verifyAttribute",value:function(e,t,n){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("verifyUserAttribute",{AttributeName:e,Code:t,AccessToken:this.signInUserSession.getAccessToken().getJwtToken()},function(e){return e?n.onFailure(e):n.onSuccess("SUCCESS")}):n.onFailure(new Error("User is not authenticated"))}},{key:"getDevice",value:function(e){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("getDevice",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken(),DeviceKey:this.deviceKey},function(t,n){return t?e.onFailure(t):e.onSuccess(n)}):e.onFailure(new Error("User is not authenticated"))}},{key:"forgetSpecificDevice",value:function(e,t){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("forgetDevice",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken(),DeviceKey:e},function(e){return e?t.onFailure(e):t.onSuccess("SUCCESS")}):t.onFailure(new Error("User is not authenticated"))}},{key:"forgetDevice",value:function(e){var t=this;this.forgetSpecificDevice(this.deviceKey,{onFailure:e.onFailure,onSuccess:function(n){return t.deviceKey=null,t.deviceGroupKey=null,t.randomPassword=null,t.clearCachedDeviceKeyAndPassword(),e.onSuccess(n)}})}},{key:"setDeviceStatusRemembered",value:function(e){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void this.client.makeUnauthenticatedRequest("updateDeviceStatus",{AccessToken:this.signInUserSession.getAccessToken().getJwtToken(),DeviceKey:this.deviceKey,DeviceRememberedStatus:"remembered"},function(t){return t?e.onFailure(t):e.onSuccess("SUCCESS")}):e.onFailure(new Error("User is not authenticated"))}},{key:"setDeviceStatusNotRemembered",value:function(e){return null!=this.signInUserSession&&this.signInUserSession.isValid()?void 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return r(e,[{key:"getUserPoolId",value:function(){return this.userPoolId}},{key:"getClientId",value:function(){return this.clientId}},{key:"signUp",value:function(e,t,n,i,s){var r=this;this.client.makeUnauthenticatedRequest("signUp",{ClientId:this.clientId,Username:e,Password:t,UserAttributes:n,ValidationData:i},function(t,n){if(t)return s(t,null);var i={Username:e,Pool:r},o={user:new l.default(i),userConfirmed:n.UserConfirmed};return s(null,o)})}},{key:"getCurrentUser",value:async function(){var e="CognitoIdentityServiceProvider."+this.clientId+".LastAuthUser",t=await this.storage.getItem(e);if(t){var n={Username:t,Pool:this};return new l.default(n)}
return null}}]),e}();t.default=f},function(e,t,n){"use strict";function i(e){return e&&e.__esModule?e:{default:e}}
Object.defineProperty(t,"__esModule",{value:!0});var s=n(13);Object.defineProperty(t,"AuthenticationDetails",{enumerable:!0,get:function(){return i(s).default}});var r=n(2);Object.defineProperty(t,"AuthenticationHelper",{enumerable:!0,get:function(){return i(r).default}});var o=n(4);Object.defineProperty(t,"CognitoAccessToken",{enumerable:!0,get:function(){return i(o).default}});var a=n(5);Object.defineProperty(t,"CognitoIdToken",{enumerable:!0,get:function(){return i(a).default}});var u=n(6);Object.defineProperty(t,"CognitoRefreshToken",{enumerable:!0,get:function(){return i(u).default}});var l=n(7);Object.defineProperty(t,"CognitoUser",{enumerable:!0,get:function(){return i(l).default}});var c=n(8);Object.defineProperty(t,"CognitoUserAttribute",{enumerable:!0,get:function(){return i(c).default}});var h=n(14);Object.defineProperty(t,"CognitoUserPool",{enumerable:!0,get:function(){return i(h).default}});var f=n(9);Object.defineProperty(t,"CognitoUserSession",{enumerable:!0,get:function(){return i(f).default}});var d=n(10);Object.defineProperty(t,"DateHelper",{enumerable:!0,get:function(){return i(d).default}})}])})

[itrestian]

We have an examples folder in this project that for now contains a custom setup of this library.

[fantapop]

Thanks for forging ahead on this @npalethorpe. One question I'm wondering is why is it the minified code You pasting?

[npalethorpe]

@fantapop the original cognito identity js script was minified so it's what I had to work with (unless I missed the unminified version!)
I suggest you beautify the code if you're planning on modifying/reading.

[jmparsons]

@npalethorpe I have instructions on installing the cognito identity source code into react native:

https://github.com/aws/aws-sdk-js/issues/1434

Might be a bit easier for you to work with the source directly to modify things such as the storage.

[youanswer]

@npalethorpe @jmparsons
Thanks guys for your efforts, they helped a lot.
I'm struggling to get it working for iOS device and it's super glitchy on Android, maybe you have an idea what's going on...

I've used minified library from this thread, it works well for simulator, but on iOS device it gives me "incorrect username/password" error even though I'm using the same username and password to login.
It doesn't happen when I run app in the remote debug mode(using Chrome on my mac), so I think there must be some problem with javascript engine on iOS and the code from aws-sdk.
I've noticed an issue on startup with crypto library and I thought that password is being encrypted incorrectly, since iOS doesn't have native support for all the node features which Chrome has. I've tried some hacky ways of overwriting that crypto dependency with the help of rn-nodeify package, but the issue remains.
I wonder if this is related: https://forums.aws.amazon.com/thread.jspa?threadID=230694
I've been fighting with this problem for the last couple days, I will post here if I manage to make it work.
Thanks

[jmparsons]

@youanswer I got mine working, but it's done differently, check in the way I described above. It works on phone and simulator. I imported the src and modified it inside of my react native project. The webpack bundling in this project doesn't include the react native branch of the sdk. That's probably the most important part to getting it to work. Then there's the issue of performance with biginteger - I created a native bridge module to handle modpow. I'm going to open source my version, but don't have the spare time yet.

[youanswer]

I've patched the library to use aws-sdk from react-native branch and to use promises for AsyncStorage calls, like you suggested. It works in simulator but not on the phone. I've tried to use another biginteger library, https://github.com/peterolson/BigInteger.js, but it didn't work out, seems like there're differences in API.
Changing language on the phone didn't help, maybe using native bigInteger library will help, but writing a bridge for it seems very unclear to me since I don't have much objective-c/java experience
Here's a related comment from AWS team:

Unfortunately, there can be slight differences in BigInteger libraries that can generate

inconsistencies (these are related to byte boundaries, converting back and forth byte arrays). The only way to debug this at this point is to look at our Javascript SDK for example, fix values for the inputs, print out and make sure the values generated are the same.

https://github.com/aws/amazon-cognito-identity-js

I will mention this difficult process within the team in order to come out with a better experience when implementing SRP.

@jmparsons pls tell when you got ur stuff opensourced

[jmparsons]

@youanswer When you say it's not working on your phone, can you clarify what you mean? Is it throwing errors? Can you try letting it run for 30 seconds to see if it logs in, the biginteger takes upwards of 30+ seconds.

[youanswer]

@jmparsons it stucks for a while, around 30 seconds, then the initiateAuth request returns 'incorrect username or password' response. The same username and password work like charm when running in emulator or in remote debug mode on device.

[jmparsons]

@youanswer I can't pin point exactly what it is. The error your getting at least validates the user exists, so it is hitting cognito. I don't know why it would work in the simulator and not on the device.

[MattyK14]

@jmparsons would be interested to know when you have it opensourced!

[jmparsons]

@MattyK14 I'm actually wrapping it up now.

[jmparsons]

@MattyK14 @youanswer @npalethorpe

I finally had some spare time. I built it again using callbacks instead of promises to be fully compatible with the current library. I've only added ios support, but will add android later this week. There's an example included as well.

https://github.com/AirLabsTeam/react-native-aws-cognito-js

[MattyK14]

@jmparsons awesome dude, i'll play around with it today!

[itrestian]

Seems this had a resolution.