AmazonSecurityTokenServiceClient.AssumeRoleWithSAML or GetSessionTokenAsync fails with exception

[iprion]

If I create a AmazonSecurityTokenServiceClient, calling AssumeRoleWithSAML fails with an exception:

Object reference not set to an instance of an object

Same error occurs when calling GetSessionTokenAsync.

Here is a code sample (method was found on the internet and seems to work for the user who wrote it)

private static async Task<SessionAWSCredentials> GetTemporaryCredentialsAsync()
        {
            using (var stsClient = new AmazonSecurityTokenServiceClient())
            {
                var getSessionTokenRequest = new GetSessionTokenRequest
                {
                    DurationSeconds = 7200 // seconds
                };

                GetSessionTokenResponse sessionTokenResponse =
                              await stsClient.GetSessionTokenAsync(getSessionTokenRequest);

                Credentials credentials = sessionTokenResponse.Credentials;

                var sessionCredentials =
                    new SessionAWSCredentials(credentials.AccessKeyId,
                                              credentials.SecretAccessKey,
                                              credentials.SessionToken);
                return sessionCredentials;
            }
        }

In the debug output I see a lot of exception thrown
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'Amazon.Runtime.AmazonClientException' in AWSSDK.Core.dll
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.Sockets.SocketException' in System.dll
Exception thrown: 'System.IO.IOException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.Sockets.SocketException' in System.dll
Exception thrown: 'System.IO.IOException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.NullReferenceException' in AWSSDK.Core.dll
Exception thrown: 'System.Net.Sockets.SocketException' in System.dll
Exception thrown: 'System.IO.IOException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.Net.WebException' in System.dll
Exception thrown: 'System.NullReferenceException' in AWSSDK.Core.dll
Exception thrown: 'System.NullReferenceException' in AWSSDK.Core.dll
Exception thrown: 'System.NullReferenceException' in AWSSDK.Core.dll

Am I missing something ? Other AWS Api and classes seems to work fine (AmazonS3Client, TransferUtility.DownloadDirectory ...)

Expected Behavior

Current Behavior

Possible Solution

Steps to Reproduce (for bugs)

Context

Your Environment

• AWSSDK.Core version used: 3.3.29.12
• Service assembly and version used:
• Operating System and version:
• Visual Studio version: 2017
• Targeted .NET platform:

.NET Core Info

• .NET Core version used for development: 4.5
• .NET Core version installed in the environment where application runs: 4.5
• Output of dotnet --info:
  .NET Core SDK (reflecting any global.json):
  Version: 2.1.500
  Commit: b68b931422

Runtime Environment:
OS Name: Windows
OS Version: 6.1.7601
OS Platform: Windows
RID: win7-x64
Base Path: C:\Program Files\dotnet\sdk\2.1.500\

Host (useful for support):
Version: 2.1.6
Commit: 3f4f8eebd8

.NET Core SDKs installed:
2.1.500 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNe
tCore.All]
Microsoft.AspNetCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNe
tCore.App]
Microsoft.NETCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.
App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

• Contents of project.json/project.csproj:

[klaytaybai]

Hi @iprion, I'm sorry to hear you are having difficulties. I was not able to reproduce this issue on a Mac. I could try at a later time to reproduce on a Windows Server 2008 instance.

Are the errors you listed related to AssumeRoleWithSAML or GetSessionTokenAsync?

[pbenitez]

I'm seeing the same error on Windows Server 2012 R2.
AWSSDK.Core version used: 3.3.31.19
AWSSDK.SecurityToken : 3.3.4.58 & 3.3.100

[savanbthakkar]

Hi @pbenitez , @klaytaybai , I have the exact same problem. Did you find the solution?

Here is my sample code:

using (var stsClient = new AmazonSecurityTokenServiceClient())
{
try
{
var assumeRoleWithSAMLRequest = new AssumeRoleWithSAMLRequest
{
DurationSeconds = 43200,
SAMLAssertion = samlAssertion,
PrincipalArn = principal_arn,
RoleArn = role_arn
};
var response = await stsClient.AssumeRoleWithSAMLAsync(assumeRoleWithSAMLRequest);
var sessionCredentials =
new SessionAWSCredentials(response.Credentials.AccessKeyId,
response.Credentials.SecretAccessKey,
response.Credentials.SessionToken);
return sessionCredentials;
}
catch (Exception ee)
{
string err = ee.Message + ee.StackTrace;
throw;
}

        }

Here is my StackTrace:

Object reference not set to an instance of an object

at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.FetchCredentials()
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentials()
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentialsAsync()
at Amazon.Runtime.Internal.CredentialsRetriever.d__71.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Amazon.Runtime.Internal.RetryHandler.<InvokeAsync>d__101.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Amazon.Runtime.Internal.RetryHandler.d__101.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Amazon.Runtime.Internal.CallbackHandler.<InvokeAsync>d__91.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.Runtime.Internal.CallbackHandler.d__91.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Amazon.Runtime.Internal.ErrorCallbackHandler.<InvokeAsync>d__51.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.Runtime.Internal.MetricsHandler.d__11.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult()
at SessionManagement.AwsSessionManager.d__12.MoveNext()

[xbaha]

I am receiving this error too:
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
too many of them I can't count! Has anyone found a solution???

[savanbthakkar]

I am receiving this error too:
Exception thrown: 'System.InvalidOperationException' in AWSSDK.Core.dll
too many of them I can't count! Has anyone found a solution???

My issue turned out to be a misconfigured role in AWS.
@xbaha , Can you post the full exception including InnerExceptions if any?

[xbaha]

There was no exception thrown that stopped my app, it's just in my debug output window and too many of them, my app runs normal, but this happened after I installed AWSSimpleEmail.