[Bug 58528] New: CRYPT_AcquirePrivateKeyFromProvInfo does not check machine store for private key

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58528

            Bug ID: 58528
           Summary: CRYPT_AcquirePrivateKeyFromProvInfo does not check
                    machine store for private key
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: crypt32
          Assignee: wine-bugs(a)winehq.org
          Reporter: katharina(a)hacked.xyz
      Distribution: ---

When adding a Certificate via PFXImportCertStore with CRYPT_MACHINE_KEYSET, a
subsequent call to CryptAcquireCertificatePrivateKey fails to find the added
private key.

This is due to CRYPT_AcquirePrivateKeyFromProvInfo issuing a
CryptAcquireContextA call without specifying a keyset; thus always defaulting
to CRYPT_USER_KEYSET.

Minimal reproducer: https://gitlab.winehq.org/-/snippets/26

Thanks to Hans Leidekker for additional support in IRC.

This affects the Iis extension from WiX-built MSI installers, i.e. a lot of
real-world apps. Real-World breaking app is the installer for the 3DExperience
Launcher.

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