Question

您好我正在尝试编写上传pdf文件的代码，然后将其ftps到NAS框，然后允许用户查看文档 - 即反过来通过ftp从nas获取文档。一切都很好。但是我现在需要加密NAs盒子上的数据。我读过有关过滤器但是我无法使它工作我见过的唯一的东西是文本。我现在所处的地方是：

发送代码

 $passphrase = 'My secret';

 /* Turn a human readable passphrase
  * into a reproducable iv/key pair
  */
 $iv = substr(md5('iv'.$passphrase, true), 0, 8);
 $key = substr(md5('pass1'.$passphrase, true) . 
                md5('pass2'.$passphrase, true), 0, 24);
 $opts = array('iv'=>$iv, 'key'=>$key);

 $fp = fopen($file, 'wb');//$file is tne uploaded file
 stream_filter_append($fp, 'mcrypt.tripledes', STREAM_FILTER_WRITE, $opts);
 fwrite($fp, 'Secret secret secret data');// I know this bit is wrong!!
 fclose($fp);

 if (ftp_put($conn_id, $remote_file, $file, FTP_ASCII)) {
       //echo "successfully uploaded $file\n";

所以我用评论

改变了它

 $passphrase = 'My secret';

 /* Turn a human readable passphrase
  * into a reproducable iv/key pair
  */
 $iv = substr(md5('iv'.$passphrase, true), 0, 8);
 $key = substr(md5('pass1'.$passphrase, true) . 
                md5('pass2'.$passphrase, true), 0, 24);
 $opts = array('iv'=>$iv, 'key'=>$key);

 $fp = fopen($file, 'wb');
 $fplocal = fopen("templocal.PDF", 'wb');

 stream_filter_append($fplocal, 'mcrypt.tripledes', STREAM_FILTER_WRITE, $opts);
 fwrite($fplocal, $fp);
 fclose($fplocal);
 fclose($fp);


      // try to upload $file
      if (ftp_put($conn_id, $remote_file, $fplocal,

但它不起作用 - 我做错了吗？

Answer 1

$fplocal = fopen("templocal.PDF", 'wb');
stream_filter_append($fplocal, 'mcrypt.tripledes', STREAM_FILTER_WRITE, $opts);
fwrite($fplocal, file_get_contents($file));
fclose($fplocal);

评论问题

已编辑

<?php 

// Crypt parameters
    $passphrase = 'thisIsThePassphrase';
    $iv  = substr( 
                md5('iv'.$passphrase, true)
                , 0, 8 
            );
    $key = substr( 
                md5('pad1'.$passphrase, true) . 
                md5('pad2'.$passphrase, true)
               , 0, 24
            );
    $opts = array('iv'=>$iv, 'key'=>$key);

// Input file crypt to outputFile
    $outputFile = fopen("outputFileToWrite.PDF", "wb");
    stream_filter_append(
        $outputFile
        , 'mcrypt.tripledes'
        , STREAM_FILTER_WRITE
        , $opts
    );
    fwrite(
        $outputFile
        , file_get_contents("inputFileToRead.pdf")
    );
    fclose($outputFile);

?>

Answer 2

@mcnd我找到了最好的解决方案，包括示例。请查看以下链接。对于那些需要完整的php加密过滤器概念的人。

Encrypt / Decrypt

谢谢。

使用PHP过滤器加密PDF文件的问题

2 个答案: