/// <summary>
/// Marshal array of extensions into one big buffer
/// </summary>
/// <param name="extensions">Array of extensions</param>
/// <returns>An allocated buffer (from Marshal.AllocHGlobal) containing the data</returns>
private IntPtr MarshalExtensions(X509Extension[] extensions)
{
int stringSize = extensions.Sum(x => Encoding.ASCII.GetByteCount(x.Oid.Value) + 1);
int dataSize = extensions.Sum(x => x.RawData.Length);
int structSize = Marshal.SizeOf(typeof(CryptoApiMethods.CERT_EXTENSION));
IntPtr ret = IntPtr.Zero;
IntPtr currStructPtr = IntPtr.Zero;
IntPtr currDataPtr = IntPtr.Zero;
IntPtr currStringPtr = IntPtr.Zero;
ret = Marshal.AllocHGlobal((extensions.Length * structSize) + dataSize + stringSize);
currStructPtr = ret;
currDataPtr = ret + (extensions.Length * structSize);
currStringPtr = currDataPtr + dataSize;
foreach (var x in extensions)
{
byte[] oidString = Encoding.ASCII.GetBytes(x.Oid.Value + "\0");
var certExt = new CryptoApiMethods.CERT_EXTENSION();
certExt.pszObjId = currStringPtr;
certExt.Value = new CryptoApiMethods.CRYPTOAPI_BLOB();
certExt.Value.pbData = currDataPtr;
certExt.Value.cbData = (uint)x.RawData.Length;
certExt.fCritical = x.Critical;
Marshal.StructureToPtr(certExt, currStructPtr, false);
Marshal.Copy(oidString, 0, currStringPtr, oidString.Length);
Marshal.Copy(x.RawData, 0, currDataPtr, x.RawData.Length);
currStructPtr += structSize;
currStringPtr += oidString.Length;
currDataPtr += x.RawData.Length;
}
return(ret);
}
/// <summary>
/// Marshal array of extensions into one big buffer
/// </summary>
/// <param name="extensions">Array of extensions</param>
/// <returns>An allocated buffer (from Marshal.AllocHGlobal) containing the data</returns>
private IntPtr MarshalExtensions(X509Extension[] extensions)
{
int stringSize = extensions.Sum(x => Encoding.ASCII.GetByteCount(x.Oid.Value) + 1);
int dataSize = extensions.Sum(x => x.RawData.Length);
int structSize = Marshal.SizeOf(typeof(CryptoApiMethods.CERT_EXTENSION));
IntPtr ret = IntPtr.Zero;
IntPtr currStructPtr = IntPtr.Zero;
IntPtr currDataPtr = IntPtr.Zero;
IntPtr currStringPtr = IntPtr.Zero;
ret = Marshal.AllocHGlobal((extensions.Length * structSize) + dataSize + stringSize);
currStructPtr = ret;
currDataPtr = ret + (extensions.Length * structSize);
currStringPtr = currDataPtr + dataSize;
foreach (var x in extensions)
{
byte[] oidString = Encoding.ASCII.GetBytes(x.Oid.Value + "\0");
var certExt = new CryptoApiMethods.CERT_EXTENSION();
certExt.pszObjId = currStringPtr;
certExt.Value = new CryptoApiMethods.CRYPTOAPI_BLOB();
certExt.Value.pbData = currDataPtr;
certExt.Value.cbData = (uint)x.RawData.Length;
certExt.fCritical = x.Critical;
Marshal.StructureToPtr(certExt, currStructPtr, false);
Marshal.Copy(oidString, 0, currStringPtr, oidString.Length);
Marshal.Copy(x.RawData, 0, currDataPtr, x.RawData.Length);
currStructPtr += structSize;
currStringPtr += oidString.Length;
currDataPtr += x.RawData.Length;
}
return ret;
}