CNG replacement for CryptQueryObject

问题:

I'm interested in trying to read fields out of a digital signature. I have code that calls CryptQueryObject, then CryptMsgGetParam to get some fields and finally CertFindCertificateInStore to load the certificate.

Any hints on how to do this using the Cryptography Next Generation APIs? Microsoft tells me CryptQueryObject is deprecated but doesn't point to its replacement.