public static SigningKey CreateFromCertificate(X509Certificate2 certificate)
{
SafeCryptKeyHandle cryptKeyHandleFromCertificatePrivateKey = CngNative.GetCryptKeyHandleFromCertificatePrivateKey(certificate);
string text = CngNative.NCryptGetPropertyString(cryptKeyHandleFromCertificatePrivateKey, "Algorithm Group");
if (text.Equals("RSA", StringComparison.OrdinalIgnoreCase))
{
return(new RsaSigningKey(cryptKeyHandleFromCertificatePrivateKey, certificate));
}
return(new DsaSigningKey(cryptKeyHandleFromCertificatePrivateKey, certificate));
}
internal static int NCryptGetPropertyInt32(SafeCryptKeyHandle hObject, string propertyName)
{
byte[] array = new byte[4];
int num;
CngNative.ErrorCode errorCode = CngNative.NCryptGetProperty(hObject, propertyName, array, array.Length, out num, 0);
if (errorCode != CngNative.ErrorCode.Success)
{
throw new Win32Exception((int)errorCode);
}
return(BitConverter.ToInt32(array, 0));
}
internal static SafeCryptKeyHandle GetCryptKeyHandleFromCertificatePrivateKey(X509Certificate2 cert)
{
SafeCryptKeyHandle result = new SafeCryptKeyHandle();
uint num = 0u;
bool flag = false;
if (!CngNative.CryptAcquireCertificatePrivateKey(cert.Handle, 262208u, IntPtr.Zero, ref result, ref num, ref flag))
{
int lastWin32Error = Marshal.GetLastWin32Error();
throw new Win32Exception(lastWin32Error);
}
if (!flag || num != 4294967295u)
{
throw new InvalidOperationException();
}
return(result);
}
internal static string NCryptGetPropertyString(SafeCryptKeyHandle hObject, string propertyName)
{
int num = 0;
CngNative.ErrorCode errorCode = CngNative.NCryptGetProperty(hObject, propertyName, null, 0, out num, 0);
if (errorCode != CngNative.ErrorCode.Success)
{
throw new Win32Exception((int)errorCode);
}
byte[] array = new byte[num];
errorCode = CngNative.NCryptGetProperty(hObject, propertyName, array, array.Length, out num, 0);
if (errorCode != CngNative.ErrorCode.Success)
{
throw new Win32Exception((int)errorCode);
}
string arg_4E_0 = Encoding.Unicode.GetString(array, 0, num);
char[] trimChars = new char[1];
return(arg_4E_0.Trim(trimChars));
}
internal SigningKey(SafeCryptKeyHandle keyHandle, X509Certificate2 certificate)
{
this.KeyHandle = keyHandle;
this.Certificate = certificate;
this.CertificateThumbprint = SigningKey.StringToByteArray(this.Certificate.Thumbprint);
}
internal RsaSigningKey(SafeCryptKeyHandle keyHandle, X509Certificate2 certificate) : base(keyHandle, certificate)
{
}
internal static extern CngNative.ErrorCode NCryptSignHashPkcs1(SafeCryptKeyHandle hKey, [In] ref CngNative.BCRYPT_PKCS1_PADDING_INFO pPaddingInfo, [MarshalAs(UnmanagedType.LPArray)][In] byte[] pbHashValue, int cbHashValue, [MarshalAs(UnmanagedType.LPArray)] byte[] pbSignature, int cbSignature, out int pcbResult, CngNative.AsymmetricPaddingMode dwFlags);
internal static extern CngNative.ErrorCode NCryptSignHash(SafeCryptKeyHandle hKey, IntPtr pPaddingInfo, [MarshalAs(UnmanagedType.LPArray)] byte[] pbHashValue, int cbHashValue, [MarshalAs(UnmanagedType.LPArray)] byte[] pbSignature, int cbSignature, out int pcbResult, int dwFlags);
internal static extern CngNative.ErrorCode NCryptGetProperty(SafeCryptKeyHandle hObject, string pszProperty, [MarshalAs(UnmanagedType.LPArray)][Out] byte[] pbOutput, int cbOutput, out int pcbResult, int dwFlags);
internal static extern bool CryptAcquireCertificatePrivateKey([In] IntPtr pCertContext, [In] uint dwFlags, [In] IntPtr pvReserved, [In][Out] ref SafeCryptKeyHandle phKeyHandle, [In][Out] ref uint pdwKeySpec, [In][Out] ref bool pfCallerFreeProv);
