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Microsoft Windows provides a system-wide storage for X509 certificates and private keys. As a workaround for this major OS limitation, we introduced a built-in certificate validator in the 2016 R3 release.When the signature of a certificate being validated utilizes SHA-256, SHA-384 or SHA-512 hashing algorithm and cannot be validated using Windows Crypto API, Rebex built-in validator is used instead. Skip Revocation Check` has been specified because the OS doesn't support this option at all. The CRL cache directory is Only CRLs are supported at the moment. The following certificate extensions are not supported and a validation error is reported when a certificate chain with utilizing them (as critical extensions) is encountered: Rebex enhanced built-in validator can be used for SHA-1 certificates as well - it is accessible through `Rebex. This is a continuation of my post on Avoiding X.509 chain policy caching when using WCF with certificate security. I wrote the code below to implement certificate validation against a published CRL in real-time.
Open Ssh, true); ' save a certificate with private key to a PFX file cert. Pfx, "password") ' save a certificate to a DER file cert. Der) ' save certificate's private key to a base-64 encoded PKCS #8 file cert. Load Der(der Path) ' load a certificate from a DER file and a private key from a key file Dim cert3 = Certificate. Load Der With Key(der Path, key Path, key Password) A certificate can be saved either to a PKCS #12 or PFX file or to a DER file. I wrote a gist here on certificate validation/creation pitfalls.I don't know if it is up for release but I figured I would get more input, and things to add to it, if I would just released it.