private static bool TryGetProviderSigner(IntPtr wvtStateData, out IntPtr pProvSigner, out X509Certificate2 timestamperCert)
{
pProvSigner = IntPtr.Zero;
timestamperCert = null;
// The GetLastWin32Error of this is checked, but PreSharp doesn't seem to be
// able to see that.
#pragma warning disable 56523
IntPtr pProvData =
NativeMethods.WTHelperProvDataFromStateData(wvtStateData);
#pragma warning restore 56523
if (pProvData != IntPtr.Zero)
{
pProvSigner =
NativeMethods.WTHelperGetProvSignerFromChain(pProvData, 0, 0, 0);
if (pProvSigner != IntPtr.Zero)
{
NativeMethods.CRYPT_PROVIDER_SGNR provSigner =
Marshal.PtrToStructure <NativeMethods.CRYPT_PROVIDER_SGNR>(pProvSigner);
if (provSigner.csCounterSigners == 1)
{
//
// time stamper cert available
//
timestamperCert = GetCertFromChain(provSigner.pasCounterSigners);
}
return(true);
}
}
return(false);
}
private static Signature GetSignatureFromWintrustData(
string filePath,
DWORD error,
NativeMethods.WINTRUST_DATA wtd)
{
Signature signature = null;
X509Certificate2 signerCert = null;
X509Certificate2 timestamperCert = null;
s_tracer.WriteLine("GetSignatureFromWintrustData: error: {0}", error);
// The GetLastWin32Error of this is checked, but PreSharp doesn't seem to be
// able to see that.
#pragma warning disable 56523
IntPtr pProvData =
NativeMethods.WTHelperProvDataFromStateData(wtd.hWVTStateData);
#pragma warning enable 56523
if (pProvData != IntPtr.Zero)
{
IntPtr pProvSigner =
NativeMethods.WTHelperGetProvSignerFromChain(pProvData, 0, 0, 0);
if (pProvSigner != IntPtr.Zero)
{
//
// get cert of the signer
//
signerCert = GetCertFromChain(pProvSigner);
if (signerCert != null)
{
NativeMethods.CRYPT_PROVIDER_SGNR provSigner =
(NativeMethods.CRYPT_PROVIDER_SGNR)
ClrFacade.PtrToStructure <NativeMethods.CRYPT_PROVIDER_SGNR>(pProvSigner);
if (provSigner.csCounterSigners == 1)
{
//
// time stamper cert available
//
timestamperCert = GetCertFromChain(provSigner.pasCounterSigners);
}
if (timestamperCert != null)
{
signature = new Signature(filePath,
error,
signerCert,
timestamperCert);
}
else
{
signature = new Signature(filePath,
error,
signerCert);
}
signature.SignatureType = SignatureType.Authenticode;
}
}
}
Diagnostics.Assert(((error == 0) && (signature != null)) || (error != 0), "GetSignatureFromWintrustData: general crypto failure");
if ((signature == null) && (error != 0))
{
signature = new Signature(filePath, error);
}
return(signature);
}
