Kirk EvansPrincipal Premier Field Engineer, Microsoft Corporation3-603

Understanding Authentication and Permissions with Apps for SharePoint and Office

MicrosoftPrincipal Premier Field EngineerMicrosoft Certified Master—SP2010

http://blogs.msdn.com/kaevans

Kirk Evans

Please use Twitter! @kaevans #bldwin

15+ Years of Experience

Expertise

@kaevans

Establishing trust.Types of app authentication.OAuth authentication.App authorization.Dynamic permission requests.

Agenda

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Establishing trust

Dr. Garland prepares to fall by genvessel, Creative Commons Attribution 2.0 Generic, http://creativecommons.org/licenses/by/2.0/

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App model: past, present, and future

SharePoint

SharePoint 2007

Sandbox

SharePoint 2010

SharePoint

Azure, IIS, LAMP, etc…

_api

SharePoint 2013

Demo: SharePoint connect

Types of app authentication

SharePoint hosted app

SharePoint“Host” web

App Web JavaScript

SharePoint“AppWeb”

Cross domain JavaScript library

SharePoint“Host” web

SharePoint“AppWeb”

JavaScript(cross domain)

Cloud-hosted app

SharePoint“Host” web

SharePoint“AppWeb”

OAuth

AuthenticationUser credentials

provided?Start

End

User only context

App only context

User + app context

Anonymous context

App tokenprovided?

App tokenIncludes user?

Yes

No

No

No

Yes Yes

Call is to an app web?

No

Yes

Demo: basic app authentication

OAuth authentication

ClientResource server

Resource owner

Authorization server

App.comSharePointBrowser

ACS

1

App.comSharePointBrowser

ACS

1) User browses to a SharePoint page with an app part on it.

1

App.comSharePointBrowser

ACS

2) SharePoint requests a context token.

2

1

App.comSharePointBrowser

ACS

3) ACS returns a signed context token.

32

2

1

App.comSharePointBrowser

ACS

4) SharePoint renders page with iframe which will POST the context token to App.com.

3

4

POST https://app.com/…SPAppToken=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.e…

2

1

App.comSharePointBrowser

ACS

5) iframe causes browser to request contents from App.com including the context token.

3

4

5

2

1

App.comSharePointBrowser

ACS

6) App.com validates the signature on the context token, extracts the auth code, and uses its credentials to request an access token from ACS.

3

4

5

6

2

App.comSharePointBrowser

ACS

7) Windows Azure Access Control Services (ACS) returns an access token.

3

1

4

5

6 7

2

1

App.comSharePointBrowser

ACS

8) App.com calls SharePoint CSOM or REST API with access token.

3

4

5

6 7

8

2

App.comSharePointBrowser

ACS

9) SharePoint returns data from CSOM or REST API call.

3

1

4

5

6 7

8

9

2

1

App.comSharePointBrowser

ACS

10) App.com returns the iframe contents.

3

4

5

6 7

8

9

10

App.comSharePointBrowser

ACS

5

6 7

8

Context

Refresh

Access

OAuth token summary

Context token format—Base 64 EncodedSPAppToken=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.c4gAOr-4OsWo-M54t1WRT0OrjVHtl2c7jpK4N5Hbof4

Context token format—Decoded JSON{ "aud":ad696e55-3f33-4078-b367-2e7b75d645f2/localhost:44300@2c439330-685e-4c13-817b-e057b9637ad0 "iss":00000001-0000-0000-c000-000000000000@2c439330-685e-4c13-817b-e057b9637ad0 "nbf":2012-11-11 20:27:25Z (11/11/2012 12:27:25 PM) - 1352665645 "exp":2012-11-12 08:27:25Z (11/12/2012 12:27:25 AM) - 1352708845 "appctxsender":00000003-0000-0ff1-ce00-000000000000@2c439330-685e-4c13-817b-e057b9637ad0 "appctx":{ "CacheKey":"BSiK8SfA/eVNeMMtIJcVBO3lI5LXcPc7JwIG2XcjX4w=“ "SecurityTokenServiceUri":"https://accounts.accesscontrol.windows.net/tokens/OAuth/2" } "refreshtoken":IAAAAKBCoPpo-EVoOgwA0fwH5PWw… "isbrowserhostedapp":true}

App Authorization

Permission requestsApps request the permissions they require to run:

<AppPermissionRequests AllowAppOnlyPolicy="true"> <AppPermissionRequest Scope="http://sharepoint/content/sitecollection" Right="Read"/> <AppPermissionRequest Scope="http://sharepoint/content/sitecollection/web/list" Right="Write"> <Property Name="BaseTemplateId" Value="101"/> </AppPermissionRequest> <AppPermissionRequest Scope="http://sharepoint/social/microfeed" Right="Manage"/> <AppPermissionRequest Scope="http://sharepoint/search" Right="Query"/></AppPermissionRequests>

Permission requests<AppPermissionRequest Scope="http://sharepoint/content/sitecollection" Right="Read"/>

ProductPermission ProviderSpecific component Capability

Available app permissionsScope Scope Alias Right

http://sharepoint/content/tenant AllSites Read;Write;Manage;FullControl

http://sharepoint/content/sitecollection Site Read;Write;Manage;FullControl

http://sharepoint/content/sitecollection/web Web Read;Write;Manage;FullControl

http://sharepoint/content/sitecollection/web/list List Read;Write;Manage;FullContr

olhttp://sharepoint/bcs/connection None (not currently

supported) Read

http://sharepoint/search Search QueryAsUserIgnoreAppPrincipal

http://sharepoint/projectserver ProjectAdmin Managehttp://sharepoint/projectserver/projects Projects Read;Writehttp://sharepoint/projectserver/projects/project Project Read;Writehttp://sharepoint/projectserver/enterpriseresources ProjectResources Read;Writehttp://sharepoint/projectserver/statusing ProjectStatusing SubmitStatushttp://sharepoint/projectserver/reporting ProjectReporting Readhttp://sharepoint/projectserver/workflow ProjectWorkflow Elevatehttp://sharepoint/social/tenant AllProfiles Read;Write;Manage;FullContr

olhttp://sharepoint/social/core Social Read;Write;Manage;FullContr

olhttp://sharepoint/social/microfeed Microfeed Read;Write;Manage;FullContr

olhttp://sharepoint/taxonomy TermStore Read;Write

Consent

Demo: app permissions

Dynamic app permission requests

App.comSharePointBrowser

ACS

1) User browses to a web page on App.com.

1

App.comSharePointBrowser

ACS

2) Browser is redirected to OAuthAuthorize.aspx

1

2

2

App.comSharePointBrowser

ACS

3) SharePoint looks up the app principal based on the client_id.

1

2

2

/_layouts/15/OAuthAuthorize.aspx?IsDlg=1&client_id=3ca819d1-0ef8-4cbf-aa76-9ae45fd78b14&scope=Web.Write&response_type=code

3 3

App.comSharePointBrowser

ACS

4) User grants permission, browser is redirected to App.com with code.

1

3

2

3

4

24

https://localhost:44301/Default.aspx?code=IAAAACn2TwEi67U76rep34e...S4NLsp4mi2IR2g&IsDlg=1

App.comSharePointBrowser

ACS

5) App.com requests access token using code.

1

3

2

3

4

5

24

App.comSharePointBrowser

ACS

6) Microsoft Azure Access Control Services returns an Access token.

1

3

2

3

4

5 6

24

App.comSharePointBrowser

ACS

7) App.com requests data from SharePoint using access token.

1

3

2

3

4

5 6

7

24

App.comSharePointBrowser

ACS

8) Data is returned from SharePoint and page is rendered.

1

3

2

3

4

5 6

7

8

24

8

Demo: SPLister

Establishing trust.Types of app authentication.OAuth authentication.App authorization.Dynamic permission requests.

Summary

Resourceshttp://dev.office.comhttp://blogs.msdn.com/kaevans

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