"1101", "VK_VERSION" => "008", "VK_SND_ID" => "HP", "VK_REC_ID" => "uid100010", "VK_STAMP" => "46", "VK_T_NO" => "12376", "VK_AMOUNT" => "0.01", "VK_CURR" => "EUR", "VK_REC_ACC" => "LT657300010135270430", "VK_REC_NAME" => "BIGBANK AS FILIALAS", "VK_SND_ACC" => "LT121000011101001000", "VK_SND_NAME" => "Vardenis Pavardenis", "VK_REF" => "466", "VK_MSG" => "ecbb2a311859f06dee26d632fc64516c", "VK_T_DATE" => "22.06.2020", "VK_ENCODING" => "UTF-8", "VK_LANG" => "LIT", "VK_MAC" => "XRhXWHpsJznSECmtl3HpyfKq187GJ0zbqnBcVs5oBQmbfW6zUKI9HHzekYvA5GShmcZvqwUP2isGV5XfRCFiHgyHz4Uha1U08IUJTgh5g36wskcWoT24OFouyvNDS68jB1+oXTvHmb+712Ph4urUS6QuXES0AOCMgiC5N5CmULRSzc2b+yuuv8yM67EVM3bozjiS9OF3AiUHqFvcjdVD6W/6obHWXGHn+I1iO3p0BCrsN7HfyXnD5IQTufYS9DziLCdgua1/s3jFrlx3fkCnoyOI9PGOfOtRP7w0Ar/CjwqwNapbZQD15ZNEY1pG1Q0muRP+n82TMREr940fxt3qOQ==", "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) . $fields["VK_STAMP"] . /* 46 */ str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] . /* 12376 */ str_pad (mb_strlen($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) . $fields["VK_SND_ACC"] . /* LT121000011101001000 */ str_pad (mb_strlen($fields["VK_SND_NAME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SND_NAME"] . /* Vardenis Pavardenis */ str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 466 */ str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* ecbb2a311859f06dee26d632fc64516c */ str_pad (mb_strlen($fields["VK_T_DATE"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATE"]; /* 22.06.2020 */ /* $data = "0041101003008002HP009uid10001000246005123760040.01003EUR020LT657300010135270430019BIGBANK AS FILIALAS020LT121000011101001000019Vardenis Pavardenis003466032ecbb2a311859f06dee26d632fc64516c01022.06.2020"; */ // STEP 4. Verify the data with RSA-SHA1 // ===================================== if (openssl_verify ($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: