"1002",
        "VK_VERSION"     => "008",
        "VK_SND_ID"      => "uid100010",
        "VK_STAMP"       => "2759",
        "VK_AMOUNT"      => "0.01",
        "VK_CURR"        => "EUR",
        "VK_ACC"         => "LT657300010135270430",
        "VK_NAME"        => "BIGBANK AS FILIALAS",
        "VK_REF"         => "27591",
        "VK_MSG"         => "903580c9dc99a1c7449a2cbf73dcfd55",
        "VK_RETURN"      => "https://dsm-banklink-frontend-lt-dev.dca.origin.big.local/r",
        "VK_CANCEL"      => "https://dsm-banklink-frontend-lt-dev.dca.origin.big.local/r",
        "VK_LANG"        => "LIT",
        "VK_ENCODING"    => "UTF-8"
);
// STEP 3. Generate data to be signed
// ==================================
// Data to be signed is in the form of XXXYYYYY where XXX is 3 char
// zero padded length of the value and YYY the value itself
// NB! Swedbank Lithuania expects symbol count, not byte count with UTF-8,
// so use `mb_strlen` instead of `strlen` to detect the length of a string
$data = str_pad (mb_strlen($fields["VK_SERVICE"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SERVICE"] .    /* 1002 */
        str_pad (mb_strlen($fields["VK_VERSION"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_VERSION"] .    /* 008 */
        str_pad (mb_strlen($fields["VK_SND_ID"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_SND_ID"] .     /* uid100010 */
        str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"),   3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] .      /* 2759 */
        str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] .     /* 0.01 */
        str_pad (mb_strlen($fields["VK_CURR"], "UTF-8"),    3, "0", STR_PAD_LEFT) . $fields["VK_CURR"] .       /* EUR */
        str_pad (mb_strlen($fields["VK_REF"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_REF"] .        /* 27591 */
        str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_MSG"];         /* 903580c9dc99a1c7449a2cbf73dcfd55 */
/* $data = "0041002003008009uid10001000427590040.01003EUR00527591032903580c9dc99a1c7449a2cbf73dcfd55"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* BX6U3Ou+Yo9I1pd2EIDf5mXpvmrTTYRol+M4GQDZvmeTnFkyg1onlHB7B9N4dymsJUNhgb7BpCI4ZH0lQQJGZE+wnT7u3PenL8K33P6oore7DeHSTK4eCuYIl7bLJBrAhnv1CqkhhQgFK9CiRrDc67J9X7ke0RPn2BVmwxIVFq89wkDZPiu4AjOEIKl/oGOCczU7QJ/KGDGY6h6zQfN+8W6Yo0CXCx4DnQ2RnRBnf82q5xg9pb5k9A1D3bvXS70WpnYCBWu6zymNuEXpCP4lVr2gbOG1g4dhN7kaJOUoubaOgjeSYXPYIQLQG/QDyfVduq9mQIEqefeRvwx/LLtu1w== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
        
        Makse teostamise näidisrakendus "Swedbank Lithuania"