"1012",
        "VK_VERSION"     => "008",
        "VK_SND_ID"      => "uid100036",
        "VK_STAMP"       => "56",
        "VK_AMOUNT"      => "3.50",
        "VK_CURR"        => "EUR",
        "VK_REF"         => "563",
        "VK_MSG"         => "Ref. 2012290004",
        "VK_RETURN"      => "https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/",
        "VK_CANCEL"      => "https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/",
        "VK_DATETIME"    => "2020-12-29T10:33:11+0000",
        "VK_LANG"        => "EST",
        "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! SEB 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) . $fields["VK_SERVICE"] .    /* 1012 */
        str_pad (mb_strlen($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) . $fields["VK_SND_ID"] .     /* uid100036 */
        str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"),   3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] .      /* 56 */
        str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] .     /* 3.50 */
        str_pad (mb_strlen($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) . $fields["VK_REF"] .        /* 563 */
        str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] .        /* Ref. 2012290004 */
        str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] .     /* https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/ */
        str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] .     /* https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/ */
        str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"];    /* 2020-12-29T10:33:11+0000 */
/* $data = "0041012003008009uid100036002560043.50003EUR003563015Ref. 2012290004066https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/066https://opera.odin.thorgate.eu/en/orders/banks/thorbanks_response/0242020-12-29T10:33:11+0000"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* EpN7kvzNGcbQrynn0AV5LdOzuC3G/brK4pY/pkxv+OLeJAv1HWFB3jTqGA/DaREXO/muZHAq3mMLHT0AVr7Ix0QhUnNt+Gn0fOX83+vN3Zd85VVbHe7IaDOiS2rHGw5saeNe5QP35wIodUQu80CNNMhHA9xT6OiV736BgoCoa8sHTsPdzkZ0vUabd0EJhB5OQt2ko0+s/FhUNr00RCE30ozpZWIQThZchE6sVGMVGHlJTvoehcO4n+R6bDmf6Ygj9Xrn7ZO1T0+pQtL9tWCuxA6GaAAv+6lzrDXhZIhWCIxo5cQddq5Ozqv5ih+44NzXfAkDYTgFurUH/OLhGaRU4w== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
        
        Makse teostamise näidisrakendus "SEB"