"4011",
"VK_VERSION" => "008",
"VK_SND_ID" => "uid100023",
"VK_REPLY" => "3012",
"VK_RETURN" => "https://banks.pastel.thorgate.eu/project/acPVRXTEQv2mSHRt?auth_action=success",
"VK_DATETIME" => "2025-09-01T16:59:11+0000",
"VK_RID" => "1756745951022",
"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! Krediidipank 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) . $fields["VK_SND_ID"] . /* uid100023 */
str_pad (mb_strlen($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) . $fields["VK_RETURN"] . /* https://banks.pastel.thorgate.eu/project/acPVRXTEQv2mSHRt?auth_action=success */
str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"] . /* 2025-09-01T16:59:11+0000 */
str_pad (mb_strlen($fields["VK_RID"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RID"]; /* 1756745951022 */
/* $data = "0044011003008009uid1000230043012077https://banks.pastel.thorgate.eu/project/acPVRXTEQv2mSHRt?auth_action=success0242025-09-01T16:59:11+00000131756745951022"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* VZQKrv2wjQxp+gYpeb0Z2+ABjVZey/Di9Nc9CYDBj+BPTYgJIi73DM0jq/9+tfPOnADrycL7LPUP8GALng1DCfG1JzOtGGrdApOFPVeHtTIBRKE3sGDKP4L021ecwHjL+vF0X+ozMFSBSfL5zoFu3cwcVoQwjScEIgtpasvMB+uxM6y6Di2tEcD9VtU0ZqSN+0pFYWh+3pfgd7bR2zGrXZtOstNL6xTqYWiP9vW+GkUyhcloi4zambMGHdVUsKntPg1ye95ZTiflWFlgf551ZMINe6fl/570aWUVUIgRpRHUjvT1BTrH84b3JXFMK3ZtR2IfTxjLV44si7QwZUEbgg== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
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