/// <summary>
/// Проверяеи ЭЦП данных.
/// </summary>
/// <param name="signature">
/// Подпись (ЭЦП).
/// </param>
/// <param name="hashContext">
/// Контекст хэша данных.
/// </param>
/// <param name="flags">
/// Дополнительные управляющие флаги.
/// </param>
/// <returns>
/// True, если ЭЦП корректна.
/// </returns>
public bool VerifySignature(byte[] signature, HashContext hashContext, int flags)
{
if (CryptoApi.CryptVerifySignature(hashContext.Handler, signature, signature.Length, handler, null, flags))
{
return(true);
}
if (Marshal.GetLastWin32Error() == Constants.NteBadSignature)
{
return(false);
}
throw new Win32Exception(Marshal.GetLastWin32Error());
}
/// <summary>
/// The create hash.
/// </summary>
/// <param name="keyContext">
/// The key context.
/// </param>
/// <param name="algid">
/// The algid.
/// </param>
/// <param name="flags">
/// The flags.
/// </param>
/// <returns>
/// The <see cref="HashContext"/>.
/// </returns>
/// <exception cref="Win32Exception">
/// </exception>
private HashContext CreateHash(KeyContext keyContext, int algid, int flags)
{
var hashHandler = IntPtr.Zero;
var keyHandler = IntPtr.Zero;
if (keyContext != null)
{
keyHandler = keyContext.Handler;
}
if (!CryptoApi.CryptCreateHash(cspHandler, algid, keyHandler, flags, ref hashHandler))
{
throw new Win32Exception();
}
var hashContext = new HashContext(hashHandler);
return(hashContext);
}
