"1012", "VK_VERSION" => "008", "VK_SND_ID" => "uid100049", "VK_STAMP" => "2430290", "VK_AMOUNT" => "50.1", "VK_CURR" => "EUR", "VK_REF" => "24302904", "VK_MSG" => "Pangalink: 2430290", "VK_RETURN" => "https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank", "VK_CANCEL" => "https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank", "VK_DATETIME" => "2023-02-02T19:21:25+0200", "VK_LANG" => "EST", "VK_ACC" => "EE171010123456789017", "VK_NAME" => "Veebimajutus", "VK_ENCODING" => "UTF-8" ); // STEP 3. Generate data to be signed // ================================== // Data to be signed is in the form of XXXYYYYY where XXX is 3 char // zero padded length of the value and YYY the value itself // NB! LHV 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) . $fields["VK_SERVICE"] . /* 1012 */ str_pad (mb_strlen($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) . $fields["VK_SND_ID"] . /* uid100049 */ str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 2430290 */ str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 50.1 */ str_pad (mb_strlen($fields["VK_CURR"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CURR"] . /* EUR */ str_pad (mb_strlen($fields["VK_REF"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_REF"] . /* 24302904 */ str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* Pangalink: 2430290 */ str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] . /* https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank */ str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank */ str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2023-02-02T19:21:25+0200 */ /* $data = "0041012003008009uid100049007243029000450.1003EUR00824302904018Pangalink: 2430290067https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank067https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank0242023-02-02T19:21:25+0200"; */ // STEP 4. Sign the data with RSA-SHA1 to generate MAC code // ======================================================== openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1); /* xyOSJMMS5mAM8rhYdLyBfFwWyeoyiK8p07RUIM01/VmfGdiqTl3jeBy2ri+m9LH38VaX/S6No1wu13iPKfZTLz2nQlYMtjhT5BaPVYrpnnBwLqCmrHS5SnUh5dz/XXnW6GyW8saGa2F83+DVKnlZDkOtOaFAyg6qXJekvD5Er/CwFS2TfTALrHPq3dFp/o24CAaAYW6R+DUtxZDzxkVBcUlsuuFrCCCVT7TnUX+UkGlti019eWMsC9RDU+mefJ3hpb8XiLERruUp4iXUk3+qiwVf/ZY7l3zp6r36s9HEmoxSJZ/gKfP41JuAC2pZmvBBjWZ6JyuYAXnB9AncspSSRw== */ $fields["VK_MAC"] = base64_encode($signature); // STEP 5. Generate POST form with payment data that will be sent to the bank // ========================================================================== ?>

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