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));
}
public override byte[] Sign(byte[] data, SignatureHashAlgorithm hashAlgorithm)
{
HashAlgorithm hashAlgorithm2 = hashAlgorithm.CreateAlgorithm();
byte[] array = hashAlgorithm2.ComputeHash(data);
int num;
CngNative.ErrorCode status = CngNative.NCryptSignHash(base.KeyHandle, IntPtr.Zero, array, array.Length, null, 0, out num, 0);
CngNative.VerifyStatus(status);
byte[] array2 = new byte[num];
status = CngNative.NCryptSignHash(base.KeyHandle, IntPtr.Zero, array, array.Length, array2, array2.Length, out num, 0);
CngNative.VerifyStatus(status);
return(array2);
}
public override byte[] Sign(byte[] data, SignatureHashAlgorithm hashAlgorithm)
{
HashAlgorithm hashAlgorithm2 = hashAlgorithm.CreateAlgorithm();
byte[] array = hashAlgorithm2.ComputeHash(data);
CngNative.BCRYPT_PKCS1_PADDING_INFO bCRYPT_PKCS1_PADDING_INFO = default(CngNative.BCRYPT_PKCS1_PADDING_INFO);
bCRYPT_PKCS1_PADDING_INFO.pszAlgId = hashAlgorithm.Name;
int num;
CngNative.ErrorCode status = CngNative.NCryptSignHashPkcs1(base.KeyHandle, ref bCRYPT_PKCS1_PADDING_INFO, array, array.Length, null, 0, out num, CngNative.AsymmetricPaddingMode.Pkcs1);
CngNative.VerifyStatus(status);
byte[] array2 = new byte[num];
status = CngNative.NCryptSignHashPkcs1(base.KeyHandle, ref bCRYPT_PKCS1_PADDING_INFO, array, array.Length, array2, array2.Length, out num, CngNative.AsymmetricPaddingMode.Pkcs1);
CngNative.VerifyStatus(status);
return(array2);
}
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));
}
protected override bool ReleaseHandle()
{
return(CngNative.NCryptFreeObject(this.handle) == CngNative.ErrorCode.Success);
}
