Получить сессионный ключ, сгенерированный из CryptDeriveKey ()

Question

Я работаю с крипто библиотеками и пытаюсь создать простой алгоритм паролей с библиотеками. Я использовал MSDN Извлечение ключа сеанса из пароля , чтобы сгенерировать ключи, передав «имя пользователя», но я не уверен, как вернуть ключ для проверки моего алгоритма. Алгоритм принимает имя пользователя, переданное выше, и сгенерированный ключ. Я попытался использовать CryptDeriveKey и CryptGetKeyParam, но он не возвращает ключ.

Как еще этого достичь?

#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <windows.h>
#include <Wincrypt.h>

#include <string.h>
#include <stdio.h>
#pragma comment( lib, "Advapi32.lib" )
#pragma comment( lib, "Rpcrt4.lib" )
#pragma comment( lib, "Ole32.lib" )
#pragma comment( lib, "Winhttp.lib" )
#pragma comment( lib, "Crypt32.lib" )

#include <tchar.h>
#include <stdio.h>

#pragma comment(lib, "crypt32.lib")


// Data to be encrypted.
// 
#define PLAIN_TEXT   TEXT("Michael Scott")

// 
// Private key with exponent of one.
// 
static BYTE PrivateKeyWithExponentOfOne[] =
{
   0x07, 0x02, 0x00, 0x00, 0x00, 0xA4, 0x00, 0x00,
   0x52, 0x53, 0x41, 0x32, 0x00, 0x02, 0x00, 0x00,
   0x01, 0x00, 0x00, 0x00, 0xAB, 0xEF, 0xFA, 0xC6,
   0x7D, 0xE8, 0xDE, 0xFB, 0x68, 0x38, 0x09, 0x92,
   0xD9, 0x42, 0x7E, 0x6B, 0x89, 0x9E, 0x21, 0xD7,
   0x52, 0x1C, 0x99, 0x3C, 0x17, 0x48, 0x4E, 0x3A,
   0x44, 0x02, 0xF2, 0xFA, 0x74, 0x57, 0xDA, 0xE4,
   0xD3, 0xC0, 0x35, 0x67, 0xFA, 0x6E, 0xDF, 0x78,
   0x4C, 0x75, 0x35, 0x1C, 0xA0, 0x74, 0x49, 0xE3,
   0x20, 0x13, 0x71, 0x35, 0x65, 0xDF, 0x12, 0x20,
   0xF5, 0xF5, 0xF5, 0xC1, 0xED, 0x5C, 0x91, 0x36,
   0x75, 0xB0, 0xA9, 0x9C, 0x04, 0xDB, 0x0C, 0x8C,
   0xBF, 0x99, 0x75, 0x13, 0x7E, 0x87, 0x80, 0x4B,
   0x71, 0x94, 0xB8, 0x00, 0xA0, 0x7D, 0xB7, 0x53,
   0xDD, 0x20, 0x63, 0xEE, 0xF7, 0x83, 0x41, 0xFE,
   0x16, 0xA7, 0x6E, 0xDF, 0x21, 0x7D, 0x76, 0xC0,
   0x85, 0xD5, 0x65, 0x7F, 0x00, 0x23, 0x57, 0x45,
   0x52, 0x02, 0x9D, 0xEA, 0x69, 0xAC, 0x1F, 0xFD,
   0x3F, 0x8C, 0x4A, 0xD0,

   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

   0x64, 0xD5, 0xAA, 0xB1,
   0xA6, 0x03, 0x18, 0x92, 0x03, 0xAA, 0x31, 0x2E,
   0x48, 0x4B, 0x65, 0x20, 0x99, 0xCD, 0xC6, 0x0C,
   0x15, 0x0C, 0xBF, 0x3E, 0xFF, 0x78, 0x95, 0x67,
   0xB1, 0x74, 0x5B, 0x60,

   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

extern "C" int __cdecl _tmain(int argc, _TCHAR* argv[])
{
DWORD       dwResult = 0;
HCRYPTPROV  hProv = 0;
HCRYPTKEY   hKey = 0;
HCRYPTKEY   hSessionKey = 0;
BYTE* pbBlob = NULL;
DWORD       cbBlob;
BYTE        byData[] = PLAIN_TEXT;
DWORD       cbData = sizeof(byData);
DWORD       dwIndex;

__try
{
    // 
    // Acquire context for default user.
    // 
    if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, 0))
    {
        dwResult = GetLastError();
        if (dwResult == NTE_BAD_KEYSET)
        {
            if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
            {
                dwResult = GetLastError();
                _tprintf(TEXT("Error [0x%x]: CryptAcquireContext() failed.\n"), dwResult);
                __leave;
            }
        }
        else
        {
            dwResult = GetLastError();
            __leave;
        }
    }

    // 
    // Import the exponent-of-one private key.
    // 
    if (!CryptImportKey(hProv,
        PrivateKeyWithExponentOfOne,
        sizeof(PrivateKeyWithExponentOfOne),
        0, 0, &hKey))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptImportKey() failed.\n"), dwResult);
        __leave;
    }
    _tprintf(TEXT("%p\n"), &hKey);

    // 
    // Generate exportable session key.
    // 
    if (!CryptGenKey(hProv, CALG_RC4, CRYPT_EXPORTABLE, &hSessionKey))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptGenKey() failed.\n"), dwResult);
        __leave;
    }
    //printf("%04x\n", &hSessionKey);
    // 
    // Display plain text.
    // 
    _tprintf(TEXT("Original text = [%s]\n"), byData);

    // 
    // Encrypt the data.
    // 
    if (!CryptEncrypt(hSessionKey, 0, TRUE, 0, byData, &cbData, cbData))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptEncrypt() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Display encrypted text.
    // 
    _tprintf(TEXT("Encrypted text = ["));
    for (dwIndex = 0; dwIndex < cbData; dwIndex++)
    {
        _tprintf(TEXT("%hhx"), byData[dwIndex]);
    }
    _tprintf(TEXT("]\n"));

    // 
    // Determine key blob size.
    // 
    if (!CryptExportKey(hSessionKey, hKey, SIMPLEBLOB, 0, NULL, &cbBlob))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptExportKey() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Allocate memory for key blob.
    // 
    if ((pbBlob = (BYTE*)LocalAlloc(LMEM_ZEROINIT, cbBlob)) == NULL)
    {
        dwResult = ERROR_NOT_ENOUGH_MEMORY;
        _tprintf(TEXT("Error [0x%x]: LocalAlloc() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Export the session key. Resultant blob is the raw session key.
    // 
    if (!CryptExportKey(hSessionKey, hKey, SIMPLEBLOB, 0, pbBlob, &cbBlob))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptExportKey() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Destroy the session key.
    // 
    CryptDestroyKey(hSessionKey);
    hSessionKey = 0;

    // 
    // Import the session key back to decrypt the data.
    // 
    if (!CryptImportKey(hProv, pbBlob, cbBlob, 0, 0, &hSessionKey))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptImportKey() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Decrypt the data.
    // 
    if (!CryptDecrypt(hSessionKey, 0, TRUE, 0, byData, &cbData))
    {
        dwResult = GetLastError();
        _tprintf(TEXT("Error [0x%x]: CryptDecrypt() failed.\n"), dwResult);
        __leave;
    }

    // 
    // Make sure we got all the data back.
    // 
    if (cbData != sizeof(byData) || _tcscmp((const char*)byData, PLAIN_TEXT) != 0)
    {
        _tprintf(TEXT("Error: Data was not decrypted correctly.\n"));
        __leave;
    }

    // 
    // Display decrypted text.
    // 
    _tprintf(TEXT("Decrypted text = [%s]\n"), byData);
}

__finally
{
    // 
    // Release all allocated resources.
    // 
    if (pbBlob)
        LocalFree(pbBlob);

    if (hSessionKey)
        CryptDestroyKey(hSessionKey);

    if (hKey)
        CryptDestroyKey(hKey);

    if (hProv)
        CryptReleaseContext(hProv, 0);
}

return (int)dwResult;
}