C++中两种获取UUID的方法（编程）

第一种，依托WMI

#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <Wbemidl.h>

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

int main(int argc, char **argv)
{
    HRESULT hres;
    // Step 1: --------------------------------------------------
    // Initialize COM. ------------------------------------------
    hres = CoInitializeEx(0, COINIT_MULTITHREADED);
    if (FAILED(hres))
    {
        cout << "Failed to initialize COM library. Error code = 0x"
            << hex << hres << endl;
        return 1;                  // Program has failed.
    }

    // Step 2: --------------------------------------------------
    // Set general COM security levels --------------------------
    // Note: If you are using Windows 2000, you need to specify -
    // the default authentication credentials for a user by using
    // a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----
    // parameter of CoInitializeSecurity ------------------------
    hres = CoInitializeSecurity(
        NULL,
        -1,                          // COM authentication
        NULL,                        // Authentication services
        NULL,                        // Reserved
        RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication
        RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation 
        NULL,                        // Authentication info
        EOAC_NONE,                   // Additional capabilities
        NULL                         // Reserved
    );

    if (FAILED(hres))
    {
        cout << "Failed to initialize security. Error code = 0x"
            << hex << hres << endl;
        CoUninitialize();
        return 1;                    // Program has failed.
    }
    // Step 3: ---------------------------------------------------
    // Obtain the initial locator to WMI -------------------------

    IWbemLocator *pLoc = NULL;

    hres = CoCreateInstance(
        CLSID_WbemLocator,
        0,
        CLSCTX_INPROC_SERVER,
        IID_IWbemLocator, (LPVOID *)&pLoc);

    if (FAILED(hres))
    {
        cout << "Failed to create IWbemLocator object."
            << " Err code = 0x"
            << hex << hres << endl;
            CoUninitialize();
        return 1;                 // Program has failed.
    }

    // Step 4: -----------------------------------------------------

    // Connect to WMI through the IWbemLocator::ConnectServer method
    IWbemServices *pSvc = NULL;
    // Connect to the rootcimv2 namespace with
    // the current user and obtain pointer pSvc
    // to make IWbemServices calls.

    hres = pLoc->ConnectServer(
        _bstr_t(L"ROOT\CIMV2"), // Object path of WMI namespace
        NULL,                    // User name. NULL = current user
        NULL,                    // User password. NULL = current
        0,                       // Locale. NULL indicates current
        NULL,                    // Security flags.
        0,                       // Authority (e.g. Kerberos)
        0,                       // Context object
        &pSvc                    // pointer to IWbemServices proxy
    );

    if (FAILED(hres))
    {
        cout << "Could not connect. Error code = 0x"
            << hex << hres << endl;
        pLoc->Release();
        CoUninitialize();
        return 1;                // Program has failed.
    }
    cout << "Connected to ROOT\CIMV2 WMI namespace" << endl;
    // Step 5: --------------------------------------------------
    // Set security levels on the proxy -------------------------
    hres = CoSetProxyBlanket(
        pSvc,                        // Indicates the proxy to se
        RPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxx
        RPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxx
        NULL,                        // Server principal name
        RPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxx
        RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
        NULL,                        // client identity
        EOAC_NONE                    // proxy capabilities
    );
    if (FAILED(hres))
    {
        cout << "Could not set proxy blanket. Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }
    // Step 6: --------------------------------------------------
    // Use the IWbemServices pointer to make requests of WMI ----
    // For example, get the name of the operating system
    IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        bstr_t("WQL"),
        bstr_t("SELECT * FROM Win32_ComputerSystemProduct"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator);
    if (FAILED(hres))
    {
        cout << "Query for operating system name failed."
            << " Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }

    IWbemClassObject *pclsObj;

    ULONG uReturn = 0;
    string test;
    while (pEnumerator)
    {
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
            &pclsObj, &uReturn);
        if (0 == uReturn)
        {
            break;
        }
        VARIANT vtProp;
        // Get the value of the Name property
        hr = pclsObj->Get(L"UUID", 0, &vtProp, 0, 0);
        wcout << " OS Name : " << vtProp.bstrVal << endl;
        VariantClear(&vtProp);
        //pclsObj->Release();
    }
    //pSvc->Release();
    //pLoc->Release();
    //pEnumerator->Release();
    //pclsObj->Release();
    //CoUninitialize();
    system("PAUSE");
    return 0;   // Program successfully completed.
}

第二种，依托GetSystemFirmwareTable

#include <Windows.h>
#include <string>
#include <tchar.h>


typedef struct _dmi_header
{
    BYTE type;
    BYTE length;
    WORD handle;
}dmi_header;



typedef struct _RawSMBIOSData
{
    BYTE    Used20CallingMethod;
    BYTE    SMBIOSMajorVersion;
    BYTE    SMBIOSMinorVersion;
    BYTE    DmiRevision;
    DWORD   Length;
    BYTE    SMBIOSTableData[];
}RawSMBIOSData;


static void dmi_system_uuid(const BYTE *p, short ver)
{
    int only0xFF = 1, only0x00 = 1;
    int i;

    for (i = 0; i < 16 && (only0x00 || only0xFF); i++)
    {
        if (p[i] != 0x00) only0x00 = 0;
        if (p[i] != 0xFF) only0xFF = 0;
    }



    if (only0xFF)
    {
        printf("Not Present");
        return;
    }

    if (only0x00)
    {
        printf("Not Settable");
        return;
    }


    if (ver >= 0x0206)
        printf("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X
",
            p[3], p[2], p[1], p[0], p[5], p[4], p[7], p[6],
            p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
    else
        printf("-%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X
",
            p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
            p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
}


const char *dmi_string(const dmi_header *dm, BYTE s)
{
    char *bp = (char *)dm;
    size_t i, len;

    if (s == 0)
        return "Not Specified";

    bp += dm->length;

    while (s > 1 && *bp)
    {
        bp += strlen(bp);
        bp++;
        s--;
    }
    if (!*bp)
        return "BAD_INDEX";

    /* ASCII filtering */
    len = strlen(bp);
    for (i = 0; i < len; i++)
        if (bp[i] < 32 || bp[i] == 127)
            bp[i] = '.';
    return bp;
}



int _tmain(int argc, _TCHAR* argv[])
{
    DWORD bufsize = 0;
    BYTE buf[65536] = { 0 };
    int ret = 0;
    RawSMBIOSData *Smbios;
    dmi_header *h = NULL;
    int flag = 1;

    ret = GetSystemFirmwareTable('RSMB', 0, 0, 0);
    if (!ret)
    {
        printf("Function failed!
");
        return 1;
    }

    printf("get buffer size is %d
", ret);
    bufsize = ret;

    ret = GetSystemFirmwareTable('RSMB', 0, buf, bufsize);

    if (!ret)
    {
        printf("Function failed!
");
        return 1;
    }



    Smbios = (RawSMBIOSData *)buf;
    BYTE *p = Smbios->SMBIOSTableData;

    if (Smbios->Length != bufsize - 8)
    {
        printf("Smbios length error
");
        return 1;
    }

    for (int i = 0; i < Smbios->Length; i++) {
        h = (dmi_header *)p;

        if (h->type == 0 && flag) {
            printf("
Type %02d - [BIOS]
", h->type);
            printf("	BIOS Vendor : %s
", dmi_string(h, p[0x4]));
            printf("	BIOS Version: %s
", dmi_string(h, p[0x5]));
            printf("	Release Date: %s
", dmi_string(h, p[0x8]));

            if (p[0x16] != 0xff && p[0x17] != 0xff)
                printf("	EC version: %d.%d
", p[0x16], p[0x17]);
            flag = 0;
        }



        else if (h->type == 1) {
            printf("
Type %02d - [System Information]
", h->type);
            printf("	Manufacturer: %s
", dmi_string(h, p[0x4]));
            printf("	Product Name: %s
", dmi_string(h, p[0x5]));
            printf("	Version: %s
", dmi_string(h, p[0x6]));
            printf("	Serial Number: %s
", dmi_string(h, p[0x7]));
            printf("	UUID: "); dmi_system_uuid(p + 0x8, Smbios->SMBIOSMajorVersion * 0x100 + Smbios->SMBIOSMinorVersion);
            printf("	SKU Number: %s
", dmi_string(h, p[0x19]));
            printf("	Family: %s
", dmi_string(h, p[0x1a]));
        }
        p += h->length;
        while ((*(WORD *)p) != 0) p++;
        p += 2;
    }

    getchar();
    return 0;

}

相关链接：http://forum.eepw.com.cn/thread/291638/1