"1101", "VK_VERSION" => "008", "VK_SND_ID" => "HP", "VK_REC_ID" => "uid100010", "VK_STAMP" => "1408", "VK_T_NO" => "11431", "VK_AMOUNT" => "0.01", "VK_CURR" => "EUR", "VK_REC_ACC" => "LT657300010135270430", "VK_REC_NAME" => "BIGBANK AS FILIALAS", "VK_SND_ACC" => "LT121000011101001000", "VK_SND_NAME" => "Testas Testauskas", "VK_REF" => "14083", "VK_MSG" => "c8c52409e14e9adc3d203c5dc567c5d1", "VK_T_DATE" => "19.03.2020", "VK_ENCODING" => "UTF-8", "VK_LANG" => "LIT", "VK_MAC" => "KDVqZ6l0+ODZx9tjQTTLBiAWnGDt887SCgJSFbet1TQJJrnGUXwpoQy50DG2NLug4pj/9BK8u1aECLKwfXWkXScsx6aPEz2RZLStnSMMmuJv+0agQ6vKcAaPy3+s8ySzvrzWQnbxNCH5+Z2Ix2VYhfE0XuHcr6DCtwZCmfxuuFE4tRRCzDQ7fNiFlmf2O+M422iwU6VB9TXeXO7o0KIgjyGCOLSFNQF7R4kNHk5vosXs0VTvBP5DxH+XvaWs1cuYXTOE4lpGLO1l0g4jQi5PteMjsk07wGZ+/2tByQKWo49sIkR/k0+wxcU2DuqyBO8qCFue/IYEqM0oRVzWdKEi7w==", "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) . $fields["VK_STAMP"] . /* 1408 */ str_pad (mb_strlen($fields["VK_T_NO"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_NO"] . /* 11431 */ str_pad (mb_strlen($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) . $fields["VK_SND_NAME"] . /* Testas Testauskas */ str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 14083 */ str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* c8c52409e14e9adc3d203c5dc567c5d1 */ str_pad (mb_strlen($fields["VK_T_DATE"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_T_DATE"]; /* 19.03.2020 */ /* $data = "0041101003008002HP009uid1000100041408005114310040.01003EUR020LT657300010135270430019BIGBANK AS FILIALAS020LT121000011101001000017Testas Testauskas00514083032c8c52409e14e9adc3d203c5dc567c5d101019.03.2020"; */ // STEP 4. Verify the data with RSA-SHA1 // ===================================== if (openssl_verify ($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: