C / C++ / MFC

#include <stdint.h>

/* take 64 bits of data in v[0] and v[1] and 128 bits of key[0] - key[3] */

void encipher(unsigned int num_rounds, uint32_t v[2], uint32_t const key[4]) {
    unsigned int i;
    uint32_t v0=v[0], v1=v[1], sum=0, delta=0x9E3779B9;
    for (i=0; i < num_rounds; i++) {
        v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + key[sum & 3]);
        sum += delta;
        v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + key[(sum>>11) & 3]);
    }
    v[0]=v0; v[1]=v1;
}

void decipher(unsigned int num_rounds, uint32_t v[2], uint32_t const key[4]) {
    unsigned int i;
    uint32_t v0=v[0], v1=v[1], delta=0x9E3779B9, sum=delta*num_rounds;
    for (i=0; i < num_rounds; i++) {
        v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + key[(sum>>11) & 3]);
        sum -= delta;
        v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + key[sum & 3]);
    }
    v[0]=v0; v[1]=v1;
}

BOOL CPrivatePoolBioDlg::EnrollFingerprint()
{
    WINBIO_UNIT_SCHEMA *unitSchemaArray = NULL;
    SIZE_T unitSchemaCount = 0;

    WINBIO_UNIT_ID unitIdArray[1]={};
    SIZE_T unitIdCount = ARRAYSIZE(unitIdArray);

    WINBIO_SESSION_HANDLE sessionHandle;

    HRESULT hr; // = S_OK;

   //Enumarating devices...
   hr = WinBioEnumBiometricUnits(WINBIO_TYPE_FINGERPRINT,&unitSchemaArray,&unitSchemaCount);

   if(FAILED(hr))
   {
        CString m;
        m.Format(_T("Unable to Enumarate Device 0x%08x"),hr);
        AfxMessageBox(m);
        return 0;
   }
   //Enumaration Success...
   unitIdArray[0] = unitSchemaArray[0].UnitId;

   //Opening the session...
   hr = WinBioOpenSession(WINBIO_TYPE_FINGERPRINT,WINBIO_POOL_PRIVATE,WINBIO_FLAG_BASIC,            
                unitIdArray,unitIdCount,&PRIVATE_POOL_DATABASE_ID,&sessionHandle);
   if(FAILED(hr))
   {
    ///////////////////////HERE FUNCTION IS RETURNING WINBIO_E_CONFIGURATION_FAILURE////////////////////
        CString m;
        m.Format(_T("Unable to Start session 0x%08x, %d"),hr, GetLastError());
        AfxMessageBox(m);
        return 0;
   }

   //Session opened...
   WinBioCloseSession(sessionHandle);
   return 1;
}

WINBIO_E_CONFIGURATION_FAILURE

GUID PRIVATE_POOL_DATABASE_ID = 
{ 0x5086745d, 0xb3f9, 0x4da7, { 0x85, 0x9e, 0x9c, 0xc4, 0x33, 0x1c, 0xe4, 0x7c } };