"1111",
"VK_VERSION" => "008",
"VK_SND_ID" => "HP",
"VK_REC_ID" => "uid100052",
"VK_STAMP" => "56",
"VK_T_NO" => "16196",
"VK_AMOUNT" => "15.00",
"VK_CURR" => "EUR",
"VK_REC_ACC" => "",
"VK_REC_NAME" => "",
"VK_SND_ACC" => "EE152200221234567897",
"VK_SND_NAME" => "Tõõger Leõpäöld",
"VK_REF" => "563",
"VK_MSG" => "Ref. 2101070001",
"VK_T_DATETIME" => "2021-01-07T15:44:35+0000",
"VK_ENCODING" => "UTF-8",
"VK_LANG" => "EST",
"VK_MAC" => "Tu0VGHnP6io7i6/QzayEq3VYx4p9tzS1rMxcMs2yOvxMfQc+7T8T6ao2tzy89FBb9K5Sklf9pZecY91SOFz5N9op1SsbaLKXmCcUO5hAmbwwOdxzcOCDaIfED4o415AsGVlV1ovggmSnRbUNKzBVQC7arSK0XQUXfpTYywb1F3oJqYDoHMtcfcYSTVn/MIupvoR4l8XYdX3KpLaCM/TwQE1elSI/syT/8B4qC1Cjyq67EmmUi9xgu9sC4JgJDk9hqWslIDzzLoZpZKDyT21SrZatRtCTv34VHmyb7Ngn2idcJHghfr+Av+ql5pdvpA37Pyrbh1QsXzPqJpPumVehGw==",
"VK_AUTO" => "N"
);
// STEP 3. Generate data to be verified
// ====================================
// Data to be verified 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) . $fields["VK_SERVICE"] . /* 1111 */
str_pad (mb_strlen($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) . $fields["VK_SND_ID"] . /* HP */
str_pad (mb_strlen($fields["VK_REC_ID"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REC_ID"] . /* uid100052 */
str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 56 */
str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] . /* 16196 */
str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 15.00 */
str_pad (mb_strlen($fields["VK_CURR"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CURR"] . /* EUR */
str_pad (mb_strlen($fields["VK_REC_ACC"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REC_ACC"] . /* */
str_pad (mb_strlen($fields["VK_REC_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REC_NAME"] . /* */
str_pad (mb_strlen($fields["VK_SND_ACC"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SND_ACC"] . /* EE152200221234567897 */
str_pad (mb_strlen($fields["VK_SND_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SND_NAME"] . /* Tõõger Leõpäöld */
str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 563 */
str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* Ref. 2101070001 */
str_pad (mb_strlen($fields["VK_T_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATETIME"]; /* 2021-01-07T15:44:35+0000 */
/* $data = "0041111003008002HP009uid100052002560051619600515.00003EUR000000020EE152200221234567897015Tõõger Leõpäöld003563015Ref. 21010700010242021-01-07T15:44:35+0000"; */
// STEP 4. Verify the data with RSA-SHA1
// =====================================
if (openssl_verify ($data, base64_decode($fields["VK_MAC"]), $public_key) !== 1) {
$signatureVerified = false;
}else{
$signatureVerified = true;
}
// STEP 5. Display output of the received payment
// ==============================================
?>
Payment results
Payment:
Signature: