Hi,all
    I am studying using OpenSSL to verify an OCSP response signed by a delegated signer.
I know , there should be OCSPSigning OID in the certificate of the delegated OCSP response signer.
But , how can I judge it from the X509 structure?
 
That is to say , when I get the X509 struct of the delegated signer certificate, how can I judge this certificate has been delegated to sign the ocsp response by the issuer?
 
 
I have found the function ocsp_check_delegated() , maybe I can use it.
But I do not understand why it does so.
Can anyone kindly explain something to me?
 
 
Thank a lot
wjw

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