private CryptApi()
{
const string IntelDefaultProvider = "Intel Hardware Cryptographic Service Provider";
handle = new SafeCryptHandle();
if (NativeMethods.CryptAcquireContext(out handle, null,
IntelDefaultProvider, NativeMethods.PROV_INTEL_SEC, 0))
{
return;
}
else if (NativeMethods.CryptAcquireContext(out handle, null,
null, NativeMethods.PROV_RSA_FULL, 0))
{
return;
}
else if (Marshal.GetLastWin32Error() == NativeMethods.NTE_BAD_KEYSET)
{
if (NativeMethods.CryptAcquireContext(out handle, null, null,
NativeMethods.PROV_RSA_FULL, NativeMethods.CRYPT_NEWKEYSET))
{
return;
}
}
throw new NotSupportedException("Unable to acquire a cryptographic service provider.");
}
public static extern bool CryptAcquireContext(out SafeCryptHandle phProv, string pszContainer, string pszProvider, uint dwProvType, uint dwFlags);
public static extern bool CryptGenRandom(SafeCryptHandle hProv, uint dwLen, byte[] pbBuffer);
private void Dispose(bool disposing)
{
if (handle == null)
return;
if (disposing)
handle.Close();
handle = null;
}
