"1111",
"VK_VERSION" => "008",
"VK_SND_ID" => "HP",
"VK_REC_ID" => "uid100052",
"VK_STAMP" => "1",
"VK_T_NO" => "10200",
"VK_AMOUNT" => "318.57",
"VK_CURR" => "EUR",
"VK_REC_ACC" => "",
"VK_REC_NAME" => "",
"VK_SND_ACC" => "EE152200221234567897",
"VK_SND_NAME" => "Tõõgera Leõpäöldi",
"VK_REF" => "13",
"VK_MSG" => "My cool payment",
"VK_T_DATETIME" => "2023-10-06T15:19:56+0000",
"VK_ENCODING" => "UTF-8",
"VK_LANG" => "EST",
"VK_MAC" => "KsB+f0ojuCu0OyNVAwFoNaD5FgcTtXJIABzT2IfWLz0/2gHflGQOvsG9xOQlem3H35Gtvq9zqPteaAgTB5/PvuBI6S+AqbOiIJ2HUbgNIyiKG5y3c2Yseapcohi276BcQBH6c2WZ3H3HGZS03TdDsSkZMTwwuMEEnddwK0BxjeYhbTuJ00bYAAJfZmCKdEO2/n7q9e8exgCW0S/F+KHjFp97MId4DGp7VteB5vTUOkHw1nHF+nc5BkrXxBFoUfghI84HPUA7tVXHyrw7cpeX1mJxsSC0ntPs+dN8oc20bxvqlEc8kiohvbHk/lKamoZcZbRY7ya+3F4bRaNL57dZNQ==",
"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) . $fields["VK_STAMP"] . /* 1 */
str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] . /* 10200 */
str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 318.57 */
str_pad (mb_strlen($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) . $fields["VK_SND_NAME"] . /* Tõõgera Leõpäöldi */
str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 13 */
str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* My cool payment */
str_pad (mb_strlen($fields["VK_T_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATETIME"]; /* 2023-10-06T15:19:56+0000 */
/* $data = "0041111003008002HP009uid100052001100510200006318.57003EUR000000020EE152200221234567897017Tõõgera Leõpäöldi00213015My cool payment0242023-10-06T15:19:56+0000"; */
// STEP 4. Verify the data with RSA-SHA1
// =====================================
if (openssl_verify ($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: