"1012",
"VK_VERSION" => "008",
"VK_SND_ID" => "uid100052",
"VK_STAMP" => "3513771",
"VK_AMOUNT" => "37.24",
"VK_CURR" => "EUR",
"VK_REF" => "35137715",
"VK_MSG" => "Pangalink: 3513771",
"VK_RETURN" => "http://localhost/payment/callback/order/bank",
"VK_CANCEL" => "http://localhost/payment/callback/order/bank",
"VK_DATETIME" => "2024-09-25T14:42:16+0300",
"VK_LANG" => "EST",
"VK_ACC" => "EE171010123456789017",
"VK_NAME" => "Veebimajutus",
"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 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) . $fields["VK_SND_ID"] . /* uid100052 */
str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 3513771 */
str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 37.24 */
str_pad (mb_strlen($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) . $fields["VK_REF"] . /* 35137715 */
str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* Pangalink: 3513771 */
str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] . /* http://localhost/payment/callback/order/bank */
str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* http://localhost/payment/callback/order/bank */
str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2024-09-25T14:42:16+0300 */
/* $data = "0041012003008009uid100052007351377100537.24003EUR00835137715018Pangalink: 3513771044http://localhost/payment/callback/order/bank044http://localhost/payment/callback/order/bank0242024-09-25T14:42:16+0300"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* LNCP7UebczTZbkErZuZopmsihnKLMvZF2p90KkYEmnTRRIQ4dTKwuRn4ErbAKh8tI2KIYWoUXdyeqbrNfr6XFoWOSlvlsQsrOPZBtUsBV+FbXye4eh1Rq5cIku+3KXzyVaaw46M/epe/5wojuTSTb1WKxWcVvLxKkcMLcNg/+/jjWiEpWwzAFVHulytoW3zhSfdWSyWhi1wGeeZMaoaT6B/Zw0lSFbtzBaHu39jQWRF9RH+YCQkFZ4Qs8367GV5qdU/DGQpB3I/qA40VltvF9RUpTowVOz/NgoKNFqYZO0DXOrNETkmh/n+H7+fn3tduYwq/SWVAFA4av3zN+MOhjQ== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
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