ROSLYN.SECURITY.CA5399 : HttpClients should enable certificate revocation list checks (C#)

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ROSLYN.SECURITY.CA5399 : HttpClients should enable certificate revocation list checks (C#)

Summary

Using HttpClient without providing a platform specific handler (WinHttpHandler or CurlHandler or HttpClientHandler) where the CheckCertificateRevocationList property is set to true, will allow revoked certificates to be accepted by the HttpClient as valid.

This check corresponds to Roslyn rule CA5399. For full rule details, see the Microsoft website: CA5399.

Properties

Class Name	HttpClients should enable certificate revocation list checks (C#)
Significance	security
Mnemonic	ROSLYN.SECURITY.CA5399
Categories	None
Availability	Available for C# only.
Enabling	Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. WARNING_FILTER += allow class="HttpClients should enable certificate revocation list checks (C#)"

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.