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Reduce SafeHandle allocation in CertEnumCertificatesInStore on Windows #45166

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Merged
merged 1 commit into from
Nov 24, 2020
Merged

Reduce SafeHandle allocation in CertEnumCertificatesInStore on Windows #45166

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26 changes: 20 additions & 6 deletions ...tography.X509Certificates/src/Internal/Cryptography/Pal.Windows/Native/Interop.crypt32.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -150,18 +150,32 @@ public static SafeCertStoreHandle CertOpenStore(CertStoreProvider lpszStoreProvi
/// the next certificate in the iteration. The final call sets pCertContext to an invalid SafeCertStoreHandle
/// and returns "false" to indicate the end of the store has been reached.
/// </summary>
public static bool CertEnumCertificatesInStore(SafeCertStoreHandle hCertStore, [NotNull] ref SafeCertContextHandle? pCertContext)
public static unsafe bool CertEnumCertificatesInStore(SafeCertStoreHandle hCertStore, [NotNull] ref SafeCertContextHandle? pCertContext)
{
unsafe
CERT_CONTEXT* pPrevCertContext;
if (pCertContext == null)
{
CERT_CONTEXT* pPrevCertContext = pCertContext == null ? null : pCertContext.Disconnect();
pCertContext = CertEnumCertificatesInStore(hCertStore, pPrevCertContext);
return !pCertContext.IsInvalid;
pCertContext = new SafeCertContextHandle();
pPrevCertContext = null;
}
else
{
pPrevCertContext = pCertContext.Disconnect();
}

pCertContext.SetHandle((IntPtr)CertEnumCertificatesInStore(hCertStore, pPrevCertContext));

if (!pCertContext.IsInvalid)
{
return true;
}

pCertContext.Dispose();
return false;
}

[DllImport(Libraries.Crypt32, CharSet = CharSet.Unicode, SetLastError = true)]
private static extern unsafe SafeCertContextHandle CertEnumCertificatesInStore(SafeCertStoreHandle hCertStore, CERT_CONTEXT* pPrevCertContext);
private static extern unsafe CERT_CONTEXT* CertEnumCertificatesInStore(SafeCertStoreHandle hCertStore, CERT_CONTEXT* pPrevCertContext);

[DllImport(Libraries.Crypt32, CharSet = CharSet.Unicode, SetLastError = true)]
public static extern SafeCertStoreHandle PFXImportCertStore([In] ref CRYPTOAPI_BLOB pPFX, SafePasswordHandle password, PfxCertStoreFlags dwFlags);
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2 changes: 2 additions & 0 deletions ...Cryptography.X509Certificates/src/Internal/Cryptography/Pal.Windows/Native/SafeHandles.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,8 @@ public SafeCertContextHandle(SafeCertContextHandle parent)
SetHandle(_parent.handle);
}

internal new void SetHandle(IntPtr handle) => base.SetHandle(handle);

protected override bool ReleaseHandle()
{
if (_parent != null)
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