if(buff)
    {
        HCRYPTPROV cryptoProv = NULL;        
        if(::CryptAcquireContext(&cryptoProv, NULL, CP_GR3410_2001_PROV, PROV_GOST_2001_DH, CRYPT_VERIFYCONTEXT))
        {
            HCRYPTHASH hHash;            
            if(::CryptCreateHash(cryptoProv, CALG_GR3411, NULL, 0, &hHash))
            {
                if(::CryptHashData(hHash,(BYTE*)buff, buffSize, 0))
                {
                    DWORD hash_size = 0;
                    DWORD paramSize;                    
                    if(::CryptGetHashParam(hHash, HP_HASHSIZE, (BYTE*)(&hash_size), &paramSize,0))
                    {
                        jbyteArray hashVal       = env->NewByteArray(hash_size);
                        jbyte*     hashValBuffer = env->GetByteArrayElements(hashVal, 0);
                        
                        if(::CryptGetHashParam(hHash, HP_HASHVAL,(BYTE*)(hashValBuffer), &hash_size,0))
                        {
                            ret_val = hashVal;
                        }
                    }
                }
                ::CryptDestroyHash(hHash);
            }
            ::CryptReleaseContext(cryptoProv, 0);
        }
    }

::CryptAcquireCertificatePrivateKey(certContext,
                                                           0,
                                                           NULL,
                                                           &cryptProv,
                                                           &keySpec,
                                                           &fCallerFreeProv)