"1012", "VK_VERSION" => "008", "VK_SND_ID" => "uid100049", "VK_STAMP" => "7", "VK_AMOUNT" => "1379.43", "VK_CURR" => "EUR", "VK_MSG" => "My cool payment", "VK_RETURN" => "http://127.0.0.1:45771/banks/thorbanks_response/", "VK_CANCEL" => "http://127.0.0.1:45771/banks/thorbanks_response/", "VK_DATETIME" => "2021-02-18T08:51:16+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! 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) . $fields["VK_STAMP"] . /* 7 */ str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] . /* 1379.43 */ str_pad (mb_strlen($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) . $fields["VK_RETURN"] . /* http://127.0.0.1:45771/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] . /* http://127.0.0.1:45771/banks/thorbanks_response/ */ str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"]; /* 2021-02-18T08:51:16+0000 */ /* $data = "0041012003008009uid10004900170071379.43003EUR000015My cool payment048http://127.0.0.1:45771/banks/thorbanks_response/048http://127.0.0.1:45771/banks/thorbanks_response/0242021-02-18T08:51:16+0000"; */ // STEP 4. Sign the data with RSA-SHA1 to generate MAC code // ======================================================== openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1); /* BVBj5/hJt3H3GU35QXrK3KPJ4EhX9WbOAcm/0gv63+XnWjHjhpb3HR+YSg4vCQ8AHeV+Ow90wwhmSgCdlaeiqlZKFFrUGokBwhokiutgZiRiAgw6QZCQZI2OU/zzCapVHnm0TWX4kNhqjkwWOCaRi0B+jV9A6+63FaghpVFXjG4HL8a6mvy/OW8qtRdW2kb7lLqAv8B3oWue7EV57Rug0Rebt+GptDADpcBv3hZh7ZLgnq7sxt8vtl53K+Iiw4BltIkqI3B7Pneul0ewvmNJYAKcFhicFqzn82IBI4gmv41yphTNUai45puEaYUt18VrYxUDJs+Jn+hggYsCbpVdww== */ $fields["VK_MAC"] = base64_encode($signature); // STEP 5. Generate POST form with payment data that will be sent to the bank // ========================================================================== ?>

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