"1111",
        "VK_VERSION"     => "008",
        "VK_SND_ID"      => "EYP",
        "VK_REC_ID"      => "uid100036",
        "VK_STAMP"       => "2909176",
        "VK_T_NO"        => "10305",
        "VK_AMOUNT"      => "117.1",
        "VK_CURR"        => "EUR",
        "VK_REC_ACC"     => "EE171010123456789017",
        "VK_REC_NAME"    => "Veebimajutus",
        "VK_SND_ACC"     => "EE171010123456789017",
        "VK_SND_NAME"    => "Tõõger Leõpäöld",
        "VK_REF"         => "29091760",
        "VK_MSG"         => "Pangalink: 2909176",
        "VK_T_DATETIME"  => "2024-08-22T10:06:45+0000",
        "VK_ENCODING"    => "UTF-8",
        "VK_LANG"        => "EST",
        "VK_MAC"         => "KklyL1jtuptg0qYm/77vYml/XFu1Qy1UCrfnv5sLSNq3l7TEkNZ7jVamP4GzFmVnjJatexzIiWz0S0BWJHyQ4DjHX71dbVTNp1xI1C/R2hC5rLlHwPgvS197ATq94XKf0m2tTaH/ZcWZWM2IZQ+qxsejl0PkYB629EHXEF+2kt5QMXHJLD5B4iupaxsEW9Q6XJEPio7Tf68HkcuBfD5kJLgXLqd5rn4f6BDA9BSHzavm8zhtsGPAPVq19BfiXYsPsgdmf/AprQcAYBbWUS/7/2zO+zsqxWXHKH8zuA00ZK3ExOxH2/2mad6Qv+/JFrzXAb6vGFCJyz41jNZzJkMefw==",
        "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! SEB 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) . $fields["VK_SND_ID"] .     /* EYP */
        str_pad (mb_strlen($fields["VK_REC_ID"], "UTF-8"),    3, "0", STR_PAD_LEFT) . $fields["VK_REC_ID"] .     /* uid100036 */
        str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] .      /* 2909176 */
        str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"),      3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] .       /* 10305 */
        str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"),    3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] .     /* 117.1 */
        str_pad (mb_strlen($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) . $fields["VK_REC_ACC"] .    /* EE171010123456789017 */
        str_pad (mb_strlen($fields["VK_REC_NAME"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_REC_NAME"] .   /* Veebimajutus */
        str_pad (mb_strlen($fields["VK_SND_ACC"], "UTF-8"),   3, "0", STR_PAD_LEFT) . $fields["VK_SND_ACC"] .    /* EE171010123456789017 */
        str_pad (mb_strlen($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) . $fields["VK_REF"] .        /* 29091760 */
        str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"),       3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] .        /* Pangalink: 2909176 */
        str_pad (mb_strlen($fields["VK_T_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATETIME"];  /* 2024-08-22T10:06:45+0000 */
/* $data = "0041111003008003EYP009uid100036007290917600510305005117.1003EUR020EE171010123456789017012Veebimajutus020EE171010123456789017015Tõõger Leõpäöld00829091760018Pangalink: 29091760242024-08-22T10:06:45+0000"; */
// STEP 4. Verify the data with RSA-SHA1
// =====================================
if (openssl_verify ($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: