"1012", "VK_VERSION" => "008", "VK_SND_ID" => "uid100052", "VK_STAMP" => "5", "VK_AMOUNT" => "3764.16", "VK_CURR" => "EUR", "VK_MSG" => "My cool payment", "VK_RETURN" => "http://127.0.0.1:55935/banks/thorbanks_response/", "VK_CANCEL" => "http://127.0.0.1:55935/banks/thorbanks_response/", "VK_DATETIME" => "2021-02-18T08:41:15+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) . $fields["VK_STAMP"] . /* 5 */ str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 3764.16 */ str_pad (mb_strlen($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) . $fields["VK_REF"] . /* */ str_pad (mb_strlen($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) . $fields["VK_RETURN"] . /* http://127.0.0.1:55935/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* http://127.0.0.1:55935/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2021-02-18T08:41:15+0000 */ /* $data = "0041012003008009uid10005200150073764.16003EUR000015My cool payment048http://127.0.0.1:55935/banks/thorbanks_response/048http://127.0.0.1:55935/banks/thorbanks_response/0242021-02-18T08:41:15+0000"; */ // STEP 4. Sign the data with RSA-SHA1 to generate MAC code // ======================================================== openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1); /* UgQEsqJ+ktoLRyYBLiFVrUHToEHYIuS8xpCGs8AfzNs3xS1nYReAOfJFRPN7Mgabw3d3YeFoQfX9vPRPgQNdY7PTO+iddcRZg3Dkxyrt+p5mXsvobqCshmOJUoppaXytMlUrvjkBTO8Kcf4mrz55zBoKvL+Ez6on1mtG/iKjDlpj5/PoqM2GwD2Nf6mJ8l6g01ySo6xrSexAQMN9VzsY87SGNyX3tl/qLIrzxqRk1/ZLTI2gkxX98hSwBHjrO0IEn8d5OgTBbfvl27mQtU5eVPKH6K+SSI4DcOeXaNnjjfBYmSOYK4PF1vnEPEhu7k+o9idiiQiRHYBybF04I1Yo8A== */ $fields["VK_MAC"] = base64_encode($signature); // STEP 5. Generate POST form with payment data that will be sent to the bank // ========================================================================== ?>

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