"1101", "VK_VERSION" => "008", "VK_SND_ID" => "HP", "VK_REC_ID" => "uid100010", "VK_STAMP" => "3281", "VK_T_NO" => "13287", "VK_AMOUNT" => "0.01", "VK_CURR" => "EUR", "VK_REC_ACC" => "LT657300010135270430", "VK_REC_NAME" => "BIGBANK AS FILIALAS", "VK_SND_ACC" => "LT787290000000130151", "VK_SND_NAME" => "Kaia Turnpu", "VK_REF" => "32816", "VK_MSG" => "0ad4ba681d48dee330056f98460a2906", "VK_T_DATE" => "03.12.2020", "VK_ENCODING" => "UTF-8", "VK_LANG" => "LIT", "VK_MAC" => "R2FClQLSc4He+c9IVbZJ1j0I1+Bp/1nLcMOON0QLmzDp7v/ziQFb13jbiHQiq9ErXjGdStJC1SZHTgBVpnBr9BYG4amNUXUhZbnjoalIxKrXnRgV76ozDkiUVHzHs0geFgkCyY9T+ezsUfGWm77jY19XAB0i/Fx3QWQSS36wWEpdrImOyvdMwCc+PPyWKKKbBMIWXbsbZW48velomBT8EpWtxKEy26x/CiGxZdga6rpVsOdpcW2BJiI5RwSFXD0zj9Y3W+IilWBHgfOBYyfnHrXKQtdUIVnHljzMfhw9ZWuzjN+TGhE8HcEIPBBh3U4RehUnLbsE0IsbRia1SSwHXg==", "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 Lithuania 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) . $fields["VK_SERVICE"] . /* 1101 */ str_pad (mb_strlen($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) . $fields["VK_REC_ID"] . /* uid100010 */ str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 3281 */ str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] . /* 13287 */ str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 0.01 */ str_pad (mb_strlen($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) . $fields["VK_REC_ACC"] . /* LT657300010135270430 */ str_pad (mb_strlen($fields["VK_REC_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REC_NAME"] . /* BIGBANK AS FILIALAS */ str_pad (mb_strlen($fields["VK_SND_ACC"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SND_ACC"] . /* LT787290000000130151 */ str_pad (mb_strlen($fields["VK_SND_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SND_NAME"] . /* Kaia Turnpu */ str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 32816 */ str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* 0ad4ba681d48dee330056f98460a2906 */ str_pad (mb_strlen($fields["VK_T_DATE"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATE"]; /* 03.12.2020 */ /* $data = "0041101003008002HP009uid1000100043281005132870040.01003EUR020LT657300010135270430019BIGBANK AS FILIALAS020LT787290000000130151011Kaia Turnpu005328160320ad4ba681d48dee330056f98460a290601003.12.2020"; */ // STEP 4. Verify the data with RSA-SHA1 // ===================================== if (openssl_verify ($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: