private static SafeHashHandleCP SetupHashAlgorithm(SafeProvHandleCP prov, byte[] rgbHash, int algId)
{
SafeHashHandleCP invalidHandle = SafeHashHandleCP.InvalidHandle;
CreateHash(prov, algId, ref invalidHandle);
uint num = 0;
if (!CApiExtWin.CryptGetHashParam(invalidHandle, 2, null, ref num, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
if ((ulong)((int)rgbHash.Length) != (ulong)num)
{
throw new CryptographicException(-2146893822);
}
if (!CApiExtWin.CryptSetHashParam(invalidHandle, 2, rgbHash, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(invalidHandle);
}
internal static void CreateHash(SafeProvHandleCP hProv, int algid, ref SafeHashHandleCP hHash)
{
if (!CApiExtWin.CryptCreateHash(hProv, (uint)algid, SafeKeyHandleCP.InvalidHandle, (uint)0, ref hHash))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
public HashAlgGost2001Win()
{
this.HashSizeValue = Gost3411Consts.HashSizeValue;
SafeHashHandleCP invalidHandle = SafeHashHandleCP.InvalidHandle;
Win32ExtUtil.CreateHash(Win32ExtUtil.StaticGost2001ProvHandle, Gost3411Consts.HashAlgId, ref invalidHandle);
this.safeHashHandle = invalidHandle;
}
public override void Initialize()
{
if (this.safeHashHandle != null &&
!this.safeHashHandle.IsClosed)
{
this.safeHashHandle.Dispose();
}
SafeHashHandleCP invalidHandle = SafeHashHandleCP.InvalidHandle;
Win32ExtUtil.CreateHash(Win32ExtUtil.StaticGost2001ProvHandle, Gost3411Consts.HashAlgId, ref invalidHandle);
this.safeHashHandle = invalidHandle;
}
internal static byte[] EndHash(SafeHashHandleCP hHash)
{
uint num = 0;
if (!CApiExtWin.CryptGetHashParam(hHash, 2, null, ref num, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
byte[] numArray = new byte[num];
if (!CApiExtWin.CryptGetHashParam(hHash, 2, numArray, ref num, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(numArray);
}
internal static void HashData(SafeHashHandleCP hHash, byte[] data, int idStart, int cbSize)
{
try
{
byte[] temp = data;
Array.Copy(data, idStart, temp, 0, cbSize);
if (!CApiExtWin.CryptHashData(hHash, temp, (uint)cbSize, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
temp = null;
}
catch (Exception ex)
{
throw new Exception("Ошибка в методе HashData. " + ex.Message);
}
}
internal static extern bool CryptSignHash([In] SafeHashHandleCP hHash, [In] uint dwKeySpec, StringBuilder sDescription,
[In] uint dwFlags, [In][Out] byte[] pbSignature, ref uint pdwSigLen);
internal static extern bool CryptCreateHash([In] SafeProvHandleCP hProv, [In] uint Algid, [In] SafeKeyHandleCP hKey, [In] uint dwFlags, [In][Out] ref SafeHashHandleCP phHash);
internal static extern bool CryptHashData([In] SafeHashHandleCP hHash, byte[] pbData, [In] uint dwDataLen, [In] uint dwFlags);
internal static extern bool CryptGetHashParam([In] SafeHashHandleCP hHash, [In] uint dwParam, [In][Out] byte[] pbData, ref uint pdwDataLen, [In] uint dwFlags);
