OPC Studio User's Guide and Reference
LocalCertificateQueries Property (_StaticCertificateSecurityParameters)



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.Security.ComTypes Namespace > _StaticCertificateSecurityParameters Interface : LocalCertificateQueries Property
Specifies queries for supplying local certificates.
Syntax
'Declaration
 
<NotNullAttribute()>
Property LocalCertificateQueries As CertificateQueryCollection
'Usage
 
Dim instance As _StaticCertificateSecurityParameters
Dim value As CertificateQueryCollection
 
instance.LocalCertificateQueries = value
 
value = instance.LocalCertificateQueries
[NotNull()]
CertificateQueryCollection LocalCertificateQueries {get; set;}
[NotNull()]
property CertificateQueryCollection^ LocalCertificateQueries {
   CertificateQueryCollection^ get();
   void set (    CertificateQueryCollection^ value);
}

Property Value

The value of this property cannot be null (Nothing in Visual Basic).

The individual elements of the property value cannot be null (Nothing in Visual Basic).

Remarks

See also: https

Here are some reasons why a collection (and not a single certificate) might be needed:

  1. Certificate Chains
    • In many cases, a single certificate is not enough to establish a trust relationship. A certificate chain, which includes intermediate certificates leading up to a root certificate, might be required. The collection allows you to provide the entire chain.
    • Including the root certificate in the collection can help in scenarios where the root certificate is not already trusted by the client or server.
  2. Multiple Identities
    • A client might need to present different certificates for different services or endpoints. Having a collection allows the client to choose the appropriate certificate based on the server's request.
    • Some protocols or services might require the client to present multiple certificates for different purposes, such as signing and encryption.
  3. Fallback Mechanisms
    • In some cases, a primary certificate might fail or be invalid. Having a collection allows the client to fall back to a secondary certificate without requiring a new connection setup.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also