"1011",
"VK_VERSION" => "008",
"VK_SND_ID" => "uid100049",
"VK_STAMP" => "53789",
"VK_AMOUNT" => "41.8",
"VK_CURR" => "EUR",
"VK_ACC" => "EE094204278699999907",
"VK_NAME" => "TEST FIRMA AS",
"VK_MSG" => "53789-88547",
"VK_RETURN" => "http://pagaripoisid.local.com/payment/swed",
"VK_CANCEL" => "http://pagaripoisid.local.com/payment/swed",
"VK_DATETIME" => "2023-07-30T11:05:18+0300",
"VK_ENCODING" => "UTF-8",
"VK_LANG" => "EST"
);
// 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) . $fields["VK_SERVICE"] . /* 1011 */
str_pad (mb_strlen($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) . $fields["VK_SND_ID"] . /* uid100049 */
str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 53789 */
str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 41.8 */
str_pad (mb_strlen($fields["VK_CURR"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CURR"] . /* EUR */
str_pad (mb_strlen($fields["VK_ACC"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_ACC"] . /* EE094204278699999907 */
str_pad (mb_strlen($fields["VK_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_NAME"] . /* TEST FIRMA AS */
str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* */
str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* 53789-88547 */
str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] . /* http://pagaripoisid.local.com/payment/swed */
str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* http://pagaripoisid.local.com/payment/swed */
str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2023-07-30T11:05:18+0300 */
/* $data = "0041011003008009uid1000490055378900441.8003EUR020EE094204278699999907013TEST FIRMA AS00001153789-88547042http://pagaripoisid.local.com/payment/swed042http://pagaripoisid.local.com/payment/swed0242023-07-30T11:05:18+0300"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* MD4LZT3CipBWDeKkKhq7wwQIwzMovK1r5RVz5frwBTt7T2J/2YAWvkSqX/FrYmozxYqDF09irggbzFpY0y41JmJjWdrBTSwze+TRfQLYKnPN3yVlgl41gbmhsoCQBAmSa1fBO3tD4DJTOVckah9Nu0NfDTVSA/xrZT6anoc6vGLfBz4JcH/MnhTVe3iVEUHKjZXwrnyFJPHeLsavkgPSCxvLvq8nGa5LEkTM89dJ4uM9V/lege9dYTyV0f84nJqfOAzL4QJvZ34a4jdz7jfLtN4tb5emwbEYm/GLGXJx8z5u5cTxITszseA7lwrPBK+N4WQ4jlDQ6ZsXp2nY5/sCPw== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
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