I have a web part and the dll is deployed to the bin of the web application.I have created a custom cas policy and deployed( wss_custom). Just for the sake of testing i have given Unrestricted access to whatever IPermission i knew (around 10). Most of the IPermissions i got is from the PermCalc.exe. Yet i get the following error generated by the web part:
System.Security.Policy.PolicyException
The problem is that i am not able to determine as to what permission is required to be given in the custom cas file.
Appreciate your suggestions.
Thanks
My general advice to find which CAS permissions you need are:
Give your dll SecurityPermission(ControlEvidence = true, ControlPolicy = true) (and of cause also Execution = true and what else you might need)
Catch the Exception and output Exception.ToString() not only Exception.Message
Then you should get a precise listing of the first Permission that failed, add that and try again.
Try to enable logging of .net assembly loader and see what happens with "fuslogvw.exe" tool (see http://msdn.microsoft.com/en-us/library/e74a18c4(VS.80).aspx for more details)
Related
We use the Microsoft.SharePoint.Client library to automate SharePoint work from our workflow engine but yesterday, one of our client informed us they wanted to disable the Legacy Authentication (LegacyAuthProtocolsEnabled to false).
Once I tried it on our end, I ended up getting an Unauthorised exception.
All in good wanting to disable the Legacy Authentication for obvious security reason, but the problem with the Modern Authentication is that it requires user interaction which is clearly not a solution since we are running tasks in the background.
I've been googling this for quite some time but I haven't found a solution as of yet on how to handle automatic authentication for background work.
Is there a way to "authenticate" to SharePoint without any user interaction while LegacyAuthProtocolsEnabled is set to false?
I found an article that suggested using the App Authentication but after reading more about it, I believe this is considered an old method to authenticate and is likely to be deprecated as well over time, but I thought I'd still give it a go just in case but it did not work. When I got to
https://tenant.sharepoint.com/_layouts/15/appregnew.aspx
Where tenant is our company domain name, and I click on the "Create" button after filling in all the relevant fields, I get the following error, which is completely useless:
Sorry, something went wrong
An unexpected error has occurred.
TECHNICAL DETAILS
According to this article HOW TO HARDEN YOUR SHAREPOINT ONLINE ENVIRONMENT BY DISABLING LEGACY AUTHENTICATION, Legacy Authentication was no longer be an option as of the 13/10/2020, yet here we are, and the option is still available in SharePoint 365 and while the article is interesting explain why Legacy Authentication should be switched off, etc... it does not get into any details as to how automated solutions should be handled.
Also found an old thread "LegacyAuthProtocolsEnabled" and Scripted Logons to SharePoint Online? where #DeanWang suggests leaving it turned on as:
All custom CSOM, PowerShell code will stop working
This may also prevent third-party apps from accessing SharePoint
Online resources.
I'm going to stop here as I could keep going and the question is already too long for my liking and bottom line is, does anyone know if there is a way, and what is the best way, to authenticate to SharePoint while running automated "scripts/code" from a background task without requiring any user interaction while the Legacy Authentication is switch off?
Thanks
Update-1
After reading articles after articles, I've yet to connect to SharePoint 365.
I also spend more time on the PnP Framework as recommended by numerous articles. I created a dummy app with the following sample code which is used again in various articles, including this one:
Secure Authentication of SharePoint with PnP Framework with C#(Code)
My code is identical as you can see:
var clientContext = new AuthenticationManager().GetACSAppOnlyContext(
"https://mycompany.sharepoint.com/sites",
"MyClientid",
"MySecretId");
using (clientContext)
{
//Get Lists
var web = clientContext.Web;
var lists = web.Lists;
clientContext.Load(lists);
clientContext.ExecuteQuery();
foreach (var list in lists)
{
}
}
And even though I've granted full control in Azure for the specific test app that's using the specific ClientId and SecretId
I'm still getting the following error (401 - unauthorized):
System.Exception
HResult=0x80131500
Message=Token request failed.
Source=PnP.Framework
StackTrace:
at SharePointPnP.IdentityModel.Extensions.S2S.Protocols.OAuth2.OAuth2S2SClient.Issue(String securityTokenServiceUrl, OAuth2AccessTokenRequest oauth2Request) in /_/src/lib/PnP.Framework/Utilities/OAuth/OAuth2S2SClient.cs:line 18
at PnP.Framework.Utilities.TokenHelper.GetAppOnlyAccessToken(String targetPrincipalName, String targetHost, String targetRealm) in /_/src/lib/PnP.Framework/Utilities/TokenHelper.cs:line 116
at PnP.Framework.Utilities.ACSTokenGenerator.GetToken(Uri siteUrl) in /_/src/lib/PnP.Framework/Utilities/ACSTokenGenerator.cs:line 37
at PnP.Framework.AuthenticationManager.<GetContextAsync>b__59_0(String site) in /_/src/lib/PnP.Framework/AuthenticationManager.cs:line 971
at PnP.Framework.AuthenticationManager.<>c__DisplayClass75_0.<GetAccessTokenContext>b__0(Object sender, WebRequestEventArgs args) in /_/src/lib/PnP.Framework/AuthenticationManager.cs:line 1336
at Microsoft.SharePoint.Client.ClientRuntimeContext.OnExecutingWebRequest(WebRequestEventArgs args)
at Microsoft.SharePoint.Client.ClientContext.FireExecutingWebRequestEventInternal(WebRequestEventArgs args)
at Microsoft.SharePoint.Client.ClientContext.GetWebRequestExecutor()
at Microsoft.SharePoint.Client.ClientContext.GetFormDigestInfoPrivate()
at Microsoft.SharePoint.Client.ClientContext.EnsureFormDigest()
at Microsoft.SharePoint.Client.ClientContext.ExecuteQuery()
at ConsoleApp5.Program.Main(String[] args) in C:\Users\myuser\source\repos\ConsoleApp5\ConsoleApp5\Program.cs:line 23
This exception was originally thrown at this call stack:
[External Code]
SharePointPnP.IdentityModel.Extensions.S2S.Protocols.OAuth2.OAuth2WebRequest.GetResponse() in OAuth2WebRequest.cs
SharePointPnP.IdentityModel.Extensions.S2S.Protocols.OAuth2.OAuth2S2SClient.Issue(string, SharePointPnP.IdentityModel.Extensions.S2S.Protocols.OAuth2.OAuth2AccessTokenRequest) in OAuth2S2SClient.cs
Inner Exception 1:
WebException: The remote server returned an error: (401) Unauthorized.
Is there another section I should be looking at (and change) in the App Registration in Azure
Since it's the SharePoint Online that we are talking about, one easy way to connect to different SharePoint Sites is by using the Azure AD App-Only approach and since you are talking about a Deamon Service you can easily use Application Permissions when registering the App Registration.
You can, and you should, read more about it from the linked Microsoft Docs article.
You can also loggin via certificate or app registration secret as it is discribed in the Log in to Microsoft 365 in order to create automated CI CD SPFx pipelines, for example.
Hope the above helps, if not feel free to ask :)
Update: Please read below in order to have a better understanding.
Firstly, in your code segment you are using a wrong method from the PnP.Framework package.
AuthenticationManager().GetACSAppOnlyContext()
The above method refers to a completely different method of obtaining an authentication token, more specifically the Sharepoint App-Only model, which... well.... more or less is not being used nowadays quite so ofte. I think I read somewhere that MS is thinking of retiring this kind of Authentication and going onwards on the path of Azure Active Directory authentication, but, unfotunately, I cannot seem to find the link.
Furthermore, I have collected three projects and uploaded them to github for you to see. You can simply clone the repo and run the projects as-is from HERE.
As you will be able to see for yourself, there are three projects in the solution, which you can run each one individually from VSCode or Vs.
More in detail:
ConsoleApp1
(sorry for the name but forgot to switch it :) )
This is a Deamon Console Project that references the PnP.Framework namespace and tries to utilize all of the goodies that the good folks form the PnP Community have contributed.
The procedure is straight forward and is the same for all three projects ->
Read the AppConfiguration
Request the Access Token with appropriate scopes (Depending the service that i am referencing)
Declare the Token to be used by our Client Context.
In the PnP.Framework-related project the above cycle can be seen as below
AuthenticationConfiguration config = AuthenticationConfiguration.ReadFromJsonFile("appsettings.json");
var authManager = new PnP.Framework.AuthenticationManager(config.ClientId, config.Certificate.CertificateDiskPath, config.Certificate.CertificatePassword, config.Tenant);
using (var cc = authManager.GetAccessTokenContext("https://<REPLACE:name of tenant>.sharepoint.com/sites/testsite2", (string siteURL) => authManager.GetAccessToken(siteURL)))
ConsoleAppMSGraph
As the name suggests this Deamon Console App utilizes GraphServiceClient graphClient in order to get all the information that you request through the graph endpoint.
Subsequntly, you will notice that for this porject the scope name changes to
string[] scopes = new string[] { "https://graph.microsoft.com/.default" };
In addition, we request a collection of all the lists that currently reside in our SharePoint Root Site with the below segment:
var lists = await graphClient.Sites["root"].Lists
.Request()
.GetAsync();
ConsoleAppSPClient
This app is the default and most simple way of accessing data on Sharepoint.
The projects utilizes MSAL.Net and Microsoft.Sharepoint.Client namespaces in order to fetch an access token and, subsequently, embed that token in all our next requests.
In order to keep the answer a bit short, please refer to here in order to see how we initiate a Confidential App Client, request for a token and, later on, embedd it in our ClientContext object.
Notes
I have listed in the Readme.md of the repo, which permissions you should give to your app registration. You can view them Here.
I am using the Sites.FullControl.All but you can narrow down the list of sites that the app registration will have access by using the Sites.Selected.
All of the above projects, reference a common class library that serves as a strongly typed configuration object.
IMPORTANT you should always use a certificate to authenticate the client app as it is mentioned here. The previous link also describes the way you can create a certificate and upload it to the store of the app registration.
Amazing! Thank you very much #Jimas13. For the last 2 weeks I was struggling to find solution to my problem!! You saved me!! If you ever been in Greece let me buy you a drink!
I have a function that generates a PDF from a HTML page like this:
HtmlToPdf converter = new HtmlToPdf();
PdfDocument doc = converter.ConvertUrl(url);
var PdfArray = doc.Save();
doc.Close();
This works perfectly when I run it in VS 2017, However when I deploy to IIS it throws the following exception: "Conversion failure error 5."
According to my Googling this is related to the IIS not having the correct access to write. However I have as an attempt given that application access to every operation.
All suggestions would be greatly appreciated.
From the troubleshooting page on SelectPdf website:
https://selectpdf.com/docs/Troubleshooting.htm#item3
The error code is this:
ERROR_ACCESS_DENIED
5 (0x5)
Access is denied.
Enable execute permissions on Select.Html.dep.
You need to go to the bin folder of your deployment to IIS and set execute permissions for the Select.Html.dep file. If you do not know the app pool user, in the first place, just set permissions for Everyone to see if it works.
This is regarding SharePoint 2010 Integration with MSCRM 2011.
While creating a record in CRM, trying to create a Custom Document location for that record and a similar folder in sharepoint, So that when user clicks on document link in the entity record it does not prompt user to create folder in Sharpoint (Trying to avoid sharepoint noise for better user experience)
I have implemented through post create asynchronous plug-in. (I did this through console program working fine). Build the plugenter code here-in and deployed to CRM.
When creating a record it error out with a message like "An internal server 500 error - Could not load the assembly with public key token etc…blab bla bla…”
But when I am debugging the plug-in it failed at the first line of command where I am instantiating sharePoint method Create client context of sharepoint, it says [System.Security.SecurityException]={“That assembly does not allow partially trusted callers”.}
As per google, per this issue it should be having one attribute “Allow partial users” in assembly info file. As per my understanding, this should be done in because the request goes from CRM plug-in to SharePoint dll. I mean share point dlls are not allowing request from my assembly. How can we change that?
I have referenced Microsoft.SharePoint.client.dll and Microsoft.SharePoint.Client.Runtime.dll
What is the alternate to overcome this issue?
Appreciate if some one can help me ..Thanks In advance.
Here is my code for SharePoint
ClientContext clientContext = new ClientContext(siteUrl)
CredentialCache cc = new CredentialCache();
Cc.Add(new Uri(siteUrl), "NTLM", CredentialCache.DefaultNetworkCredentials);
clientContext.Credentials = cc;
clientContext.AuthenticationMode = ClientAuthenticationMode.Default;
Web web = clientContext.Web;
SP.List list = web.Lists.GetByTitle(listName);
ListItemCreationInformation newItem = new ListItemCreationInformation();
newItem.UnderlyingObjectType = FileSystemObjectType.Folder;
newItem.FolderUrl = siteUrl + "/" + folderlogicalName;
if (!relativePath.Equals(string.Empty))
newItem.FolderUrl += "/" + relativePath;
newItem.LeafName = newfolderName;
SP.ListItem item = list.AddItem(newItem);
item.Update();
clientContext.ExecuteQuery();
Where I am passing the siteurl, folderlogicalname,relativepath and new foldername as parameters.
This works fine from my Console application. But when converted to CRM plug-in it gives the above specified issue
I've seen a similar issue before.
CRM plugins run inside a sandbox, so all assemblies and .NET libraries used must allow partial trust callers (since the CRM sandbox runs under partial trust). It works in the console because you are executing the code as a full trust user in that context.
This issue is not necessarily your code, but could be a dependency or a .NET library itself does not allow partial trust callers - in your case it sounds like the Sharepoint library is the culprit (but a stack trace of the error should reveal exactly where the cause is).
Since you don't have access to the source library causing the problem, to overcome the error you will likely have to create a wrapper. However, the problem is the wrapper cannot directly reference the problem library or you will get the same issue. So to get around this, you may have to create a web service which acts as your wrapper and then call the web service in your CRM plugin. This way the full trust code is executed by the web service (which is full trust) and then returns the result to your calling CRM plugin.
Here is more info on the error.
Thanks Jason. This works for me.
I Would like to add additional few points to the answer.
1. I have added the sharepoint dlls to the bin folder of CRM 2011 site.
2. Also deployed the same dlls in the folder whereever Async job is running to make my Async plug-in to work.
Thanks once again for the cooperation
When I try to open a form published from InfoPath I now get this error:
"The following location is not accessible, because it is in a different site collection:
https//portal/sites/forms/Daily%20Activity/Forms/template.xsn?SaveLocation=https//portal.alamedacountyfire.org/sites/forms/Daily%20Activity/&Source=https//portal.alamedacountyfire.org/sites/forms/Daily%2520Activity/Forms/AllItems.aspx&ClientInstalled=false&OpenIn=Browser&NoRedirect=true&XsnLocation=https//PORTAL/sites/forms/Daily%20Activity/Forms/template.xsn."
Correlation ID:12c0ab9c-caff-80a8-f1b4-64d81dcfa6ea
Following are some options that you can try:
1) Save the form template (.xsn) as the source files in the publish options. Look at the manifest file in notepad and see if you can find a reference to the incorrect location. If so, correct it and Republish the form.
2) Clear the InfoPath cache on that machine. Start->Run "infopath /cache clearall"
3) See if the site collection has a managed path, if so, give the proper url while publishing. The XSN might be getting deployed on the root site and throws error since the intended list does'nt exist.
I found this worked for me. Got the answer from another post.
"I had a similar problem and found it was due to the request management service routing from my web application host header to the server name.
There was a routing rule in my request management settings. I just disabled routing and the problem went away. I used the following powershell to disable it. "
$w = Get-SPWebApplication "http://webapphostname"
$r = $w | Get-SPRequestManagementSettings
$r.RoutingEnabled = $false
$r.Update()
You may want to configure it rather than disable it. Here’s a good resource to get you started:
http://www.harbar.net/articles/sp2013rm1.aspx
I have an Orchard site with a SQL DB, when I try to access the site the following error happen:
Server Error in '/' Application.
None of the constructors found with 'Orchard.Environment.AutofacUtil.DynamicProxy2.ConstructorFinderWrapper' on type 'BodyLogic.Physicians.Services.PhysicianService' can be invoked with the available services and parameters: Cannot resolve parameter 'BodyLogic.LegacyDb.Services.Repositories.Physicians.IPhysicianRepository physicianRepository' of constructor 'Void .ctor(BodyLogic.LegacyDb.Services.Repositories.Physicians.IPhysicianRepository, BodyLogic.LegacyDb.Services.DtoConverters.IDtoConverter)'.
When I delete the "default" folder from App_Data/Sites/... and install a new Orchard everything runs perfectly, no exception and the modules are ok, but when I change the connection string to point to SQL Server again, the same exception happens again.
Any assistance in this matter will be highly appreciated,
Regards and thanks,
Alex.
It's not SQL Server that's causing the error, but corrupted data. There is a feature that should be enabled but is not. I bet it's this one: BodyLogic.LegacyDb.
You probably added a dependency to an already enabled feature, am I right? If so then what you see is the default behavior - Orchard won't auto enable the newly added dependency. You need to do that manually.
Feature enable/disable state is stored in the db table Settings_ShellFeatureStateRecord. To fix the error:
open it,
find a record with Name equal to BodyLogic.LegacyDb and
set both InstallState and EnableState values to Up
After you've done that
clear your App_Data/cache.dat,
restart the app pool and you're set.