johnebarita
commented
4 years ago Hi there I am also working on an attendance system using a fingerprint scanner. I figured you might give some tips on where I can start. It for our capstone project actually. I hope you can reply to this message. I badly need some help. Thank you.
Well, I know that there are no proper solution to get or set the fingerprint template from the device.
But from what I understand from this library, is that it uses an algorithm to store it on the device. Here is the catch, the algorithm is an encoded string. The machine does that. So, using "unpack" to get the vx10 algorithm template string is the proper way to restore it later.
Are there any ideas or anyone who can think of a solution? I'm sure it can be done. The packet response from the machine is binary, afaik.
`
public function getUserTemplate($uid, $finger) { $template_data = ''; $this->user_data = array(); $command = CMD_USERTEMP_RRQ; $byte1 = chr((int)($uid % 256)); $byte2 = chr((int)($uid >> 8)); $command_string = $byte1.$byte2.chr($finger); $chksum = 0; $session_id = $this->session_id; $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6/H2h7/H2h8', substr( $this->received_data, $this->start_data, 8) ); $reply_id = hexdec( $u['h8'].$u['h7'] ); $buf = $this->createHeader($command, $chksum, $session_id, $reply_id, $command_string); $this->send($buf); try { $this->received_data = $this->recv(); $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6', substr( $this->received_data, $this->start_data, 8 ) ); $bytes = $this->getSizeTemplate(); if($bytes) { while($bytes > 0) { $received_data = $this->recv(1032); array_push( $this->user_data, $received_data); $bytes -= 1024; } $this->session_id = hexdec( $u['h6'].$u['h5'] ); $received_data = $this->recv(); } $template_data = array(); if(count($this->user_data) > 0) { for($x=0; $x<count($this->user_data); $x++) { if ($x == 0) { $this->user_data[$x] = substr($this->user_data[$x], 8); } else { $this->user_data[$x] = substr($this->user_data[$x], 8); } } $user_data = implode('', $this->user_data); $template_size = strlen($user_data)+6; $prefix = chr($template_size%256).chr(round($template_size/256)).$byte1.$byte2.chr($finger).chr(1); $user_data = $prefix.$user_data; if(strlen($user_data) > 6) { $valid = 1; $template_data = array($template_size, $uid, $finger, $valid, $user_data); } } return $template_data; } catch(ErrorException $e) { return FALSE; } catch(exception $e) { return FALSE; } }
`
I'm sure there is a way to get that algorithm string. And restore it in the following function
`
public function setUserTemplate($data) { $command = CMD_USERTEMP_WRQ; $command_string = $data; //$length = ord(substr($command_string, 0, 1)) + ord(substr($command_string, 1, 1))256; return $this->execCommand($command, $command_string); / $chksum = 0; $session_id = $this->session_id; $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6/H2h7/H2h8', substr( $this->received_data, $this->start_data, 8) ); $reply_id = hexdec( $u['h8'].$u['h7'] ); $buf = $this->createHeader($command, $chksum, $session_id, $reply_id, $command_string); $this->send($buf); try { $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6', substr( $this->received_data, $this->start_data, 8 ) ); $this->session_id = hexdec( $u['h6'].$u['h5'] ); return substr( $this->received_data, 8 ); } catch(ErrorException $e) { return FALSE; } catch(exception $e) { return FALSE; } */ }
`
Any ideas might make it work.