NullReferenceException when unexpected StoreType

[guillermo-ruffino]

Type of Issue

• Bug
• Enhancement
• Compliance
• Question
• Help wanted

Describe the Issue
I'm migrating from .net framework to core and found out that if I use Windows as a certificate store type the CheckApplicationInstanceCertificate method throws a NullReferenceException.

This is happening because this switch

UA-.NETStandard/Stack/Opc.Ua.Core/Security/Certificates/CertificateStoreIdentifier.cs

Line 150 in c435e58

return store;

is not handling unexpected values.

The exception is happening exactly here:

UA-.NETStandard/Stack/Opc.Ua.Core/Security/Certificates/CertificateStoreIdentifier.cs

Line 159 in c435e58

store.Open(this.StorePath);

I'm not sending a PR because I don't know what should be the right approach to handle this? A NotSupportedException may be, detailing what is going on.

A clear and concise description of what the issue is.

To Reproduce
Steps to reproduce the behavior:

1. Compile Sample '...'
2. Connect to Server '....'
3. Browse Address space '....'
4. Subscribe to Node '....'
5. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Log output
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Code snippets
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Environment (please complete the following information):

• OS: Windows 10
• Development environment: Visual Studio 2019
• Runtime: .NET 5
• OPC Package Release Version [e.g. 1.4.363.107]
• Component: Opc.Ua.Core
• Server: [e.g. Reference Server]
• Client: [e.g. UA Expert]

Additional context
Add any other context about the problem here.

[AlinMoldovean]

fixed in #1465