c - C - コード署名の検証 - Windows API

Question

バイナリのコード署名を検証する必要があります。Microsoft Authenticode という用語だと思います。Windows API を使用してこれを行う適切な方法はありますか?

Answer 1

あなたは見ましたWinVerifyTrustか？これを使用してバイナリの署名を検証する方法はすぐには明らかではないため、そのためのサンプル コードを確認することをお勧めします。

Answer 2

ドライバーの認証コードを見つける方法:

免責事項: このコードは私が書いたものではありません。

BOOL VerifyEmbeddedSignature(LPCWSTR pwszSourceFile)
{
LONG lStatus;
GUID WintrustVerifyGuid = WINTRUST_ACTION_GENERIC_VERIFY_V2;
GUID DriverActionGuid = DRIVER_ACTION_VERIFY;
HANDLE hFile;
DWORD dwHash;
BYTE bHash[100];
HCATINFO hCatInfo;
HCATADMIN hCatAdmin;

WINTRUST_DATA wd = { 0 };
WINTRUST_FILE_INFO wfi = { 0 };
WINTRUST_CATALOG_INFO wci = { 0 };

////set up structs to verify files with cert signatures
memset(&wfi, 0, sizeof(wfi));
wfi.cbStruct               = sizeof( WINTRUST_FILE_INFO );
wfi.pcwszFilePath          = pwszSourceFile;
wfi.hFile                  = NULL;
wfi.pgKnownSubject         = NULL;

memset(&wd, 0, sizeof(wd));
wd.cbStruct                = sizeof( WINTRUST_DATA );
wd.dwUnionChoice           = WTD_CHOICE_FILE;
wd.pFile                   = &wfi;
wd.dwUIChoice              = WTD_UI_NONE;
wd.fdwRevocationChecks     = WTD_REVOKE_NONE;
wd.dwStateAction           = 0;
wd.dwProvFlags             = WTD_SAFER_FLAG;
wd.hWVTStateData           = NULL;
wd.pwszURLReference        = NULL;
wd.pPolicyCallbackData    = NULL;
wd.pSIPClientData        = NULL;
wd.dwUIContext            = 0;

lStatus = WinVerifyTrust( NULL, &WintrustVerifyGuid, &wd );

////if failed, try to verify using catalog files
if (lStatus != ERROR_SUCCESS)
{
    //open the file
    hFile = CreateFileW(pwszSourceFile, GENERIC_READ,  FILE_SHARE_READ, NULL,  OPEN_EXISTING,  FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
        return FALSE;

    dwHash = sizeof(bHash);
    if (!CryptCATAdminCalcHashFromFileHandle(hFile, &dwHash, bHash, 0))
    {
        CloseHandle(hFile);
        return FALSE;
    }

    //Create a string form of the hash (used later in pszMemberTag)
    LPWSTR pszMemberTag = new WCHAR[dwHash * 2 + 1];
    for ( DWORD dw = 0; dw < dwHash; ++dw )
    {
        wsprintfW( &pszMemberTag[dw * 2], L"%02X", bHash[dw] );
    }

    if (!CryptCATAdminAcquireContext(&hCatAdmin, &DriverActionGuid, 0))
    {
        CloseHandle(hFile);
        return FALSE;
    }

    //find the catalog which contains the hash
    hCatInfo = CryptCATAdminEnumCatalogFromHash(hCatAdmin, bHash, dwHash, 0, NULL);

    if ( hCatInfo )
    {
        CATALOG_INFO ci = { 0 };
        CryptCATCatalogInfoFromContext( hCatInfo, &ci, 0 );

        memset(&wci, 0, sizeof(wci));
        wci.cbStruct                 = sizeof( WINTRUST_CATALOG_INFO );
        wci.pcwszCatalogFilePath     = ci.wszCatalogFile;
        wci.pcwszMemberFilePath      = pwszSourceFile;
        wci.pcwszMemberTag           = pszMemberTag;

        memset(&wd, 0, sizeof(wd));
        wd.cbStruct                    = sizeof( WINTRUST_DATA );
        wd.dwUnionChoice               = WTD_CHOICE_CATALOG;
        wd.pCatalog                    = &wci;
        wd.dwUIChoice                  = WTD_UI_NONE;
        wd.fdwRevocationChecks         = WTD_STATEACTION_VERIFY;
        wd.dwProvFlags                 = 0;
        wd.hWVTStateData               = NULL;
        wd.pwszURLReference            = NULL;
        wd.pPolicyCallbackData        = NULL;
        wd.pSIPClientData            = NULL;
        wd.dwUIContext                = 0;

        lStatus = WinVerifyTrust( NULL, &WintrustVerifyGuid, &wd );

        CryptCATAdminReleaseCatalogContext( hCatAdmin, hCatInfo, 0 );
    }


    CryptCATAdminReleaseContext( hCatAdmin, 0 );
    delete[] pszMemberTag;
    CloseHandle(hFile);
}

if (lStatus != ERROR_SUCCESS)
    return false;
else
    return true;
}