private void DecodeExtension()
{
uint cbDecodedValue = 0;
SafeLocalAllocHandle decodedValue = null;
if (!CAPI.DecodeObject(new IntPtr(0x24L), base.m_rawData, out decodedValue, out cbDecodedValue))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
CAPIBase.CERT_ENHKEY_USAGE cert_enhkey_usage = (CAPIBase.CERT_ENHKEY_USAGE)Marshal.PtrToStructure(decodedValue.DangerousGetHandle(), typeof(CAPIBase.CERT_ENHKEY_USAGE));
this.m_enhancedKeyUsages = new OidCollection();
for (int i = 0; i < cert_enhkey_usage.cUsageIdentifier; i++)
{
Oid oid = new Oid(Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(new IntPtr(((long)cert_enhkey_usage.rgpszUsageIdentifier) + (i * Marshal.SizeOf(typeof(IntPtr)))))), System.Security.Cryptography.OidGroup.ExtensionOrAttribute, false);
this.m_enhancedKeyUsages.Add(oid);
}
this.m_decoded = true;
decodedValue.Dispose();
}
private static unsafe byte[] EncodeExtension(OidCollection enhancedKeyUsages)
{
if (enhancedKeyUsages == null)
{
throw new ArgumentNullException("enhancedKeyUsages");
}
SafeLocalAllocHandle handle = System.Security.Cryptography.X509Certificates.X509Utils.CopyOidsToUnmanagedMemory(enhancedKeyUsages);
byte[] encodedData = null;
using (handle)
{
CAPIBase.CERT_ENHKEY_USAGE cert_enhkey_usage = new CAPIBase.CERT_ENHKEY_USAGE {
cUsageIdentifier = (uint)enhancedKeyUsages.Count,
rgpszUsageIdentifier = handle.DangerousGetHandle()
};
if (!CAPI.EncodeObject("2.5.29.37", new IntPtr((void *)&cert_enhkey_usage), out encodedData))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
return(encodedData);
}
