"4011",
"VK_VERSION" => "008",
"VK_SND_ID" => "uid100052",
"VK_REPLY" => "3012",
"VK_RETURN" => "https://banks.pastel.thorgate.eu/project/sjZfG6RrKJT4YbY5?auth_action=success",
"VK_DATETIME" => "2024-04-23T23:32:40+0000",
"VK_RID" => "1713915160558",
"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) . $fields["VK_SERVICE"] . /* 4011 */
str_pad (mb_strlen($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_REPLY"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REPLY"] . /* 3012 */
str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] . /* https://banks.pastel.thorgate.eu/project/sjZfG6RrKJT4YbY5?auth_action=success */
str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"] . /* 2024-04-23T23:32:40+0000 */
str_pad (mb_strlen($fields["VK_RID"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RID"]; /* 1713915160558 */
/* $data = "0044011003008009uid1000520043012077https://banks.pastel.thorgate.eu/project/sjZfG6RrKJT4YbY5?auth_action=success0242024-04-23T23:32:40+00000131713915160558"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* ZqDClL/lWkuVOvJNwq6ns4PJpgMuP8YEDFdvSKPv+p+8eHv3uw3RZu+imeTL7hSEDZgXfSk2ywW7ogmT14p8Xgo/rv7WeM5y+9sbsgbAg1dO/QkX2B1GrB3jP1b9gRwHS8QrhJewnqiToAK60RxbvQXycGv21Zuu2M/cslbEYOqrs9fRM0mXOc8X5yQ1DaZcMDfsl+HHjZGe3cNiTzd6wsKV4mNLyUZ7EsWw01AP4a3p9N9C4f/y0YtSpO6TMmJPmNNBvO758NVeZS+Rip13Twy/fFeYcJIPCpwsHW2J3z9NamaFco1YG3+q4vZitOaeVty5UlS4y9MaCbzpghMOpw== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
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