How can we check the expiration date of a certificate?

Problem:

When calling SecTrustEvaluate(), the SecTrustResultType value is kSecTrustResultRecoverableTrustFailure when the certificate is expired.

According to the documentation (https://developer.apple.com/documentation/security/1394363-sectrustevaluate?language=objc )

"In macOS, you can call the

SecTrustGetTrustResult

Unless I'm dumb (which is a possibility), according to the documentation for SecTrustGetTrustResult, this will just provide me with the same SecTrustResultType value.

So I have some doubt about the "to get more information" part.

Platform:

macOS, OS X 10.8 or later.

Questions:

- How can you get more information about the result of the trust evaluation?

- How can you check whether this is related to an expired certificate (though code)?