"1012", "VK_VERSION" => "008", "VK_SND_ID" => "uid100052", "VK_STAMP" => "1", "VK_AMOUNT" => "3222.45", "VK_CURR" => "EUR", "VK_REF" => "13", "VK_MSG" => "My cool payment", "VK_RETURN" => "http://localhost:50878/banks/thorbanks_response/", "VK_CANCEL" => "http://localhost:50878/banks/thorbanks_response/", "VK_DATETIME" => "2023-09-27T11:51:53+0000", "VK_LANG" => "EST", "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! Swedbank 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) . $fields["VK_SND_ID"] . /* uid100052 */ str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] . /* 1 */ str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 3222.45 */ str_pad (mb_strlen($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) . $fields["VK_REF"] . /* 13 */ str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] . /* My cool payment */ str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] . /* http://localhost:50878/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* http://localhost:50878/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2023-09-27T11:51:53+0000 */ /* $data = "0041012003008009uid10005200110073222.45003EUR00213015My cool payment048http://localhost:50878/banks/thorbanks_response/048http://localhost:50878/banks/thorbanks_response/0242023-09-27T11:51:53+0000"; */ // STEP 4. Sign the data with RSA-SHA1 to generate MAC code // ======================================================== openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1); /* q20VhV+VwCEFjGB1+99q987IYCir+MrR2gfJpraKol2yJBfDmsDXGIBMVn80XaBl2eqLVFBV+V1Zj7hQxbfrPDRDoagVUJzWIXTHvyrpv8Ffn+Thvn247tteJQFDEOCygrPpbxZvEj+55UChEpIvg8DVGzYgc7EW6Zt4D+aAes+1/kc3d1nUcgIYxQmOb8kR4jvUP6woAPyw4Cy2aDnkgCVmA0pKKVOh6qQr48wBwzJzpzR1FDR096Pbl6aCLZ44D13QGuVQ86qtuAqEW4Vsh3Y29ESOtwDz2gotlcJ+miZwIKgyqEvwqQ2O47+Um93QXATF3E0wOnGuah/I/SZ2QQ== */ $fields["VK_MAC"] = base64_encode($signature); // STEP 5. Generate POST form with payment data that will be sent to the bank // ========================================================================== ?>

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