Could not load file or assembly 'System.IdentityModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)

[RknaikIris]

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• PnP AspNetCore Authentication- https://github.com/SharePoint/PnP/tree/master/Solutions/AspNetCore.Authentication/src/OfficeDevPnP.Core.Framework.Authentication

Category

[x] Bug [ ] Enhancement

Environment

[ ] Office 365 / SharePoint Online [ ] SharePoint 2016 [x] SharePoint 2013

If SharePoint on-premises, what's exact CU version:

Expected or Desired Behavior

Should be able to create SharePoint context

Observed Behavior

Exception is thrown from OfficeDevPnP.Core.Framework.Authentication.SharePointContext class, method
public static SharePointContextProvider GetInstance(SharePointConfiguration configuration) Line: - _tokenHandler = new TokenHandler(configuration);

Exception is thrown Could not load file or assembly 'System.IdentityModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)

Steps to Reproduce

1. Create a nuget package of OfficeDevPnP.Core.Framework.Authentication, include all the DLLs from the project
2. Create asp.net core 2.2 project
3. Add Nuget from step #1. Run the project by pressing F5.

I have updated code of OfficeDevPnP.Core.Framework.Authentication project to support HighTrust apps. I getting exception while trying to read certificate information . My understanding is issue occurs due to bit mismatch i.e. 32 bit vs 64 bit. Using "DumpBin.exe -headers" I inspected the headers of System.IdentityModel.dll its 32 bit
Below is the few starting line
PE signature found

File Type: DLL

FILE HEADER VALUES 14C machine (x86) 3 number of sections 563C1C4C time date stamp Thu Nov 5 22:19:40 2015 0 file pointer to symbol table 0 number of symbols E0 size of optional header 2022 characteristics Executable Application can handle large (>2GB) addresses

I build projects i.e. OfficeDevPnP.Core.Framework.Authentication, SharePointPnP.IdentityModel.Extensions and Core Web Project with "Any CPU" as platform target. I Followed suggestion provided in thread https://github.com/dotnet/cli/issues/7532 and installed both 32 bit and 64 bit version of dotnet core and added file "Directory.Build.targets" at the root of web project with contents as below <Project> <PropertyGroup Condition="'$(OS)' == 'Windows_NT' and '$(TargetFrameworkIdentifier)' == '.NETCoreApp' and '$(SelfContained)' != 'true'" > <RunCommand Condition="'$(PlatformTarget)' == 'x86'">$(MSBuildProgramFiles32)\dotnet\dotnet</RunCommand> <RunCommand Condition="'$(PlatformTarget)' == 'x64'">$(ProgramW6432)\dotnet\dotnet</RunCommand> </PropertyGroup> </Project>

I hosted app on IIS Express. Still having the issues

[anisiaalexandra]

Hi RknaikIris,

I have had the same issue for an Azure function that tried to connect to SPO and that used App Permissions. I played a bit around with the referenced package versions and got it working. My references currently look like this:

"SharePointPnPCoreOnline": "3.3.1811", "Microsoft.IdentityModel.Clients.ActiveDirectory" : "3.19.8", "System.Security.Cryptography.X509Certificates" : "4.3.2", "AngleSharp" : "0.9.9"

Hope it helps.

Br, Anisia Pop