/// <summary>
/// Подпись хэша.
/// </summary>
/// <param name="hash">Хэш.</param>
/// <param name="keyNumber">Тип ключа.</param>
/// <returns>Подпись хэша.</returns>
public byte[] SignHash(byte[] hash, KeyNumber keyNumber)
{
using (HashContext hashContext = CreateHash(null, Constants.CpcspHashId, 0))
{
hashContext.SetHashParameter(Constants.HpHashValue, hash, 0);
return(hashContext.SignHash(keyNumber, 0));
}
}
public byte[] ComputeHash(byte[] data)
{
using (var facade = new GostCryptFacade(ProviderParams))
{
facade.AcquireContext(null, Constants.CryptVerifycontext);
using (HashContext hashContext = facade.CreateHash(null, 0))
{
hashContext.AddData(data, 0);
return(hashContext.GetValue());
}
}
}
/// <summary>
/// Подсчет хэша.
/// </summary>
/// <param name="data">Данные.</param>
/// <returns>Хэш.</returns>
public static byte[] ComputeHash(byte[] data)
{
using (var container = new KeyContainer())
{
container.AcquireContext(null, ProviderName, ProviderType, Constants.CryptVerifycontext);
using (HashContext hashContext = container.CreateHash(null, Constants.CpcspHashId, 0))
{
hashContext.AddData(data, 0);
return(hashContext.GetValue());
}
}
}
/// <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>
/// 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>
/// Проверка подписи.
/// </summary>
/// <param name="signature">Подпись.</param>
/// <param name="data">Данные.</param>
/// <param name="certificateData">Сертификат.</param>
/// <returns>True - провека прошла успешно, иначе False.</returns>
public static bool VerifyCertificate(byte[] signature, byte[] data, byte[] certificateData)
{
using (var container = new KeyContainer())
{
container.AcquireContext(null, ProviderName, ProviderType, Constants.CryptVerifycontext);
using (KeyContext keyContext = container.ImportSertificate(certificateData))
{
using (HashContext hashContext =
container.CreateHash(null, Constants.CpcspHashId, 0))
{
hashContext.AddData(data, 0);
return(keyContext.VerifySignature(signature, hashContext, 0));
}
}
}
}
public bool VerifyCertificate(
byte[] signature,
byte[] data,
byte[] certificateData)
{
using (var facade = new GostCryptFacade(ProviderParams))
{
facade.AcquireContext(null, Constants.CryptVerifycontext);
using (KeyContext keyContext = facade.ImportSertificate(certificateData))
{
using (HashContext hashContext = facade.CreateHash(null, 0))
{
hashContext.AddData(data, 0);
return(keyContext.VerifySignature(signature, hashContext, 0));
}
}
}
}
public bool VerifySignature(
byte[] signature,
byte[] data,
byte[] publicKey)
{
using (var facade = new InfotecsFacade(ProviderParams))
{
facade.AcquireContext(null, Constants.CryptVerifycontext);
using (KeyContext keyContext = facade.ImportKey(null, publicKey, 0))
{
using (HashContext hashContext = facade.CreateHash(null, 0))
{
hashContext.AddData(data, 0);
return(keyContext.VerifySignature(signature, hashContext, 0));
}
}
}
}
private HashContext CreateHash(KeyContext keyContext, int algid, int flags)
{
IntPtr hashHandler = IntPtr.Zero;
IntPtr 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);
}
private HashContext CreateHash(KeyContext keyContext, int algid, int flags)
{
IntPtr hashHandler = IntPtr.Zero;
IntPtr 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;
}
