"4011",
"VK_VERSION" => "008",
"VK_SND_ID" => "uid100049",
"VK_REPLY" => "3012",
"VK_RETURN" => "https://pangalink.client-cluster-1.thorgatedigital.tools/project/aSIn5oeVmTYnDNa0?auth_action=success",
"VK_DATETIME" => "2026-02-18T19:02:03+0000",
"VK_RID" => "1771441323902",
"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! LHV 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) . $fields["VK_SND_ID"] . /* uid100049 */
str_pad (mb_strlen($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) . $fields["VK_RETURN"] . /* https://pangalink.client-cluster-1.thorgatedigital.tools/project/aSIn5oeVmTYnDNa0?auth_action=success */
str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"] . /* 2026-02-18T19:02:03+0000 */
str_pad (mb_strlen($fields["VK_RID"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RID"]; /* 1771441323902 */
/* $data = "0044011003008009uid1000490043012101https://pangalink.client-cluster-1.thorgatedigital.tools/project/aSIn5oeVmTYnDNa0?auth_action=success0242026-02-18T19:02:03+00000131771441323902"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* FtXRrMlVrKtffSZ5u3Yhys7NdwhBjPfH4s2zgzQvkTt+trJtBytdg6bTF7i0s72JkOKk6mwdIOFQDmsVfEaf5jwOo/gfPvHqT0J9CV696ZTY+NU1WZh2vaEaEg8Hpr1WmzZP4sWFBLBfNIwkmFJ/enJhY9iAtB9wSxqf+QzQQnrOI2C/H5zm5BvknTjm8f/3jczOJTCmYtz8EXqhrp154glp+ttlhkJsfT0ZRcM7QwCitGGwcOktTFY26Ofofy67KTVfb8wOtPAY9sZcHyPECAOaW3ZISD+bFFuUyh+tegoqdAaAxS66shHhzPKu388ycpnR4EEjkNi0/HW3PF2wzA== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
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