internal static Collection <string> GetCertEKU(X509Certificate2 cert)
{
using (SecuritySupport._tracer.TraceMethod())
{
Collection <string> collection = new Collection <string>();
IntPtr handle = cert.Handle;
int pcbUsage = 0;
IntPtr zero = IntPtr.Zero;
if (!System.Management.Automation.Security.NativeMethods.CertGetEnhancedKeyUsage(handle, 0U, zero, out pcbUsage))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
if (pcbUsage > 0)
{
IntPtr num = Marshal.AllocHGlobal(pcbUsage);
try
{
System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE certEnhkeyUsage = System.Management.Automation.Security.NativeMethods.CertGetEnhancedKeyUsage(handle, 0U, num, out pcbUsage) ? (System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE)Marshal.PtrToStructure(num, typeof(System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE)) : throw new Win32Exception(Marshal.GetLastWin32Error());
IntPtr rgpszUsageIdentifier = certEnhkeyUsage.rgpszUsageIdentifier;
for (int index = 0; (long)index < (long)certEnhkeyUsage.cUsageIdentifier; ++index)
{
string stringAnsi = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(rgpszUsageIdentifier, index * Marshal.SizeOf((object)rgpszUsageIdentifier)));
collection.Add(stringAnsi);
}
}
finally
{
Marshal.FreeHGlobal(num);
}
}
return(collection);
}
}
internal static Collection <string> GetCertEKU(X509Certificate2 cert)
{
Collection <string> collection = new Collection <string>();
IntPtr handle = cert.Handle;
int pcbUsage = 0;
IntPtr zero = IntPtr.Zero;
if (System.Management.Automation.Security.NativeMethods.CertGetEnhancedKeyUsage(handle, 0, zero, out pcbUsage))
{
if (pcbUsage <= 0)
{
return(collection);
}
IntPtr pUsage = Marshal.AllocHGlobal(pcbUsage);
try
{
if (!System.Management.Automation.Security.NativeMethods.CertGetEnhancedKeyUsage(handle, 0, pUsage, out pcbUsage))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE cert_enhkey_usage = (System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE)Marshal.PtrToStructure(pUsage, typeof(System.Management.Automation.Security.NativeMethods.CERT_ENHKEY_USAGE));
IntPtr rgpszUsageIdentifier = cert_enhkey_usage.rgpszUsageIdentifier;
for (int i = 0; i < cert_enhkey_usage.cUsageIdentifier; i++)
{
string item = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(rgpszUsageIdentifier, i * Marshal.SizeOf(rgpszUsageIdentifier)));
collection.Add(item);
}
return(collection);
}
finally
{
Marshal.FreeHGlobal(pUsage);
}
}
throw new Win32Exception(Marshal.GetLastWin32Error());
}