// Token: 0x0600033F RID: 831 RVA: 0x0000CC2C File Offset: 0x0000AE2C
private static bool CheckIfValveSigned(string filePath)
{
bool result;
try
{
IntPtr zero = IntPtr.Zero;
IntPtr zero2 = IntPtr.Zero;
IntPtr zero3 = IntPtr.Zero;
int num;
int num2;
int num3;
if (!WinCrypt.CryptQueryObject(1, Marshal.StringToHGlobalUni(filePath), 16382, 14, 0, out num, out num2, out num3, ref zero, ref zero2, ref zero3))
{
result = false;
}
else
{
result = (num2 == 10);
}
}
catch
{
result = false;
}
return(result);
}
private static X509Certificate2 GetDigitalCertificate(string filePath)
{
X509Certificate2 cert = null;
int encodingType;
int contentType;
int formatType;
IntPtr certStore = IntPtr.Zero;
IntPtr cryptMsg = IntPtr.Zero;
IntPtr context = IntPtr.Zero;
if (!WinCrypt.CryptQueryObject(
WinCrypt.CERT_QUERY_OBJECT_FILE,
Marshal.StringToHGlobalUni(filePath),
(WinCrypt.CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED
| WinCrypt.CERT_QUERY_CONTENT_FLAG_PKCS7_UNSIGNED
| WinCrypt.CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED),
WinCrypt.CERT_QUERY_FORMAT_FLAG_ALL,
0,
out encodingType,
out contentType,
out formatType,
ref certStore,
ref cryptMsg,
ref context))
{
Console.WriteLine("Can't read cert at all.");
throw new InvalidOperationException($"{Marshal.GetLastWin32Error()} - Sigs ain't working.");
}
// Get size of the encoded message.
int cbData = 0;
if (!WinCrypt.CryptMsgGetParam(
cryptMsg,
WinCrypt.CMSG_ENCODED_MESSAGE,
0,
IntPtr.Zero,
ref cbData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var vData = new byte[cbData];
// Get the encoded message.
if (!WinCrypt.CryptMsgGetParam(
cryptMsg,
WinCrypt.CMSG_ENCODED_MESSAGE,
0,
vData,
ref cbData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var signedCms = new SignedCms();
signedCms.Decode(vData);
if (signedCms.SignerInfos.Count > 0)
{
var signerInfo = signedCms.SignerInfos[0];
if (signerInfo.Certificate != null)
{
cert = signerInfo.Certificate;
}
}
return(cert);
}