Setup Dkim from Froxlor 2.x with Opendkim 07.09.23

## Activate DKIM and DNS service in Froxlor and activate it for one customer domain

## Let the default settings just change Milter restart command
Please specify the restart command for the DKIM milter service:  
/etc/init.d/opendkim restart

## Change the /etc/opendkim.conf settings to:
```apacheconf
Syslog			yes
SyslogSuccess		yes
Canonicalization	relaxed/simple
OversignHeaders		From
UserID			opendkim
UMask			007
SigningTable            refile:/etc/postfix/dkim/signing.table
KeyTable                /etc/postfix/dkim/key.table
SignatureAlgorithm      rsa-sha256
Socket                  inet:8892@localhost
PidFile			/run/opendkim/opendkim.pid
TrustAnchorFile		/usr/share/dns/root.key

```

## Change /etc/postfix/main.cf Milter setting to bellow like:
not i hae local:spamass/spamass.sock as well setup

```apache2conf
# Milter configuration
milter_default_action = accept
milter_protocol = 6
smtpd_milters = inet:localhost:8892, local:spamass/spamass.sock
non_smtpd_milters = $smtpd_milters

```

## Run the below php script to access the Frolxor Database and its files to generate a opendkim format files

```php
<?php
  $sql['host']='127.0.0.1';
  $sql['user']='froxlor';
  $sql['password']='mypassword';
  $sql['db']='froxlor';

echo "...start\n";
  $fdkim = new FroxlorDkim();

echo "...get domains \n";
  $fd_domains = $fdkim->get_domains($sql);

echo "...get dkim settings \n";
  $fd_dkims = $fdkim->get_dkims_settings($sql);

echo "...create public files \n";
  $fdkim->create_public_files($fd_domains, $fd_dkims);

echo "...create key table \n";
  $fdkim->create_key_table($fd_domains, $fd_dkims);

echo "...create signing table \n";
  $fdkim->create_signing_table($fd_domains, $fd_dkims);

echo "...set dkim ownership \n";
  $fdkim->set_ownership($fd_dkims);

class FroxlorDkim {
 /**
   * Create the signing table file 
   *
   * @param array $fd_domains Domain list what should get signed 
   * @param array $fd_dkims Froxlors dkim settings
   *
   * @return bolean 
 */
  function create_signing_table($fd_domains, $fd_dkims)
  {
    if ( !file_exists($fd_dkims['dkim_prefix']) ):
      mkdir($fd_dkims['dkim_prefix'], 0777, true);
    endif;

$path = $fd_dkims['dkim_prefix'] . "/signing.table";

$f = fopen($path, "w") or die("Unable to open file!");
    foreach($fd_domains as $k=>$i):
      $domain = explode(".",$i);
      $txt = "*@${i} ${domain[0]} \n";
      fwrite($f, $txt);
    endforeach;

fclose($f);
    echo "...successfully signing table created to:  ${path} \n";
    return 1;
  }

/**
   * Create the key table file 
   *
   * @param array $fd_domains Domain list what should get signed 
   * @param array $fd_dkims Froxlors dkim settings
   *
   * @return bolean 
 */
  function create_key_table($fd_domains, $fd_dkims)
  {
    if ( !file_exists($fd_dkims['dkim_prefix']) ):
      mkdir($fd_dkims['dkim_prefix'], 0777, true);
    endif;

$path = $fd_dkims['dkim_prefix'] . "/key.table";

$f = fopen($path, "w") or die("Unable to open file!");
    foreach($fd_domains as $k=>$i):
      $domain = explode(".",$i);
      $txt = "${domain[0]} ${i}:default:${fd_dkims['dkim_prefix']}dkim${k}${fd_dkims['privkeysuffix']}\n";
      fwrite($f, $txt);
    endforeach;

fclose($f);
    echo "...successfully key table created to:  ${path} \n";
    return 1;
  }

/**
    * Get the Froxlor DKIM Domains  
    *
    * @param array $access_info Froxlor's SQL access info
    * @return array List of domains for DKIM
  */
    
  function get_domains($access_info)
  {
    $domains = [];
    /* Connect to the Froxlor Database and get the domains */
    $conn = new mysqli($access_info['host'], $access_info['user'], $access_info['password'], $access_info['db']);
    if($conn->connect_errno ):
      echo "Connect failed: "  . $conn->connect_error ;
      return $domains;
    endif;
    //echo "Connected successfully! \n\n";
    $sql = "SELECT d.dkim_id, d.domain FROM panel_domains AS d WHERE d.dkim = 1  ";
    $result = $conn->query($sql);
    if ($result->num_rows > 0):
      //echo "Query Result: \n";
      while($row = $result->fetch_assoc()):
        //echo "id: " . $row["dkim_id"]. " - Domain: " . $row["domain"] . "\n";
        $domains[$row["dkim_id"]] = $row["domain"];
      endwhile;
    endif;
    $conn->close();
    return $domains;
  }

/**
    * Get the Froxlor DKIM settings 
    *
    * @param array $access_info Froxlor's SQL access info
    * @return array Froxlor Setting Info
  */
  function get_dkims_settings($access_info)
  {
    $dkims = [];
    /* Connect to the Froxlor Database and get the domains */
    $conn = new mysqli($access_info['host'], $access_info['user'], $access_info['password'], $access_info['db']);
    if($conn->connect_errno ):
      echo "Connect failed: "  . $conn->connect_error ;
      return $dkims;
    endif;
    //echo "Connected successfully! \n\n";
    $sql = "SELECT s.varname, s.value FROM panel_settings AS s WHERE s.settinggroup = 'dkim' ";
    $result = $conn->query($sql);
    if ($result->num_rows > 0):
      //echo "Query Result: \n";
      while($row = $result->fetch_assoc()):
        //echo "varname: " . $row["varname"]. " - value: " . $row["value"] . "\n";
        $dkims[$row["varname"]] = $row["value"];
      endwhile;
    endif;
    $conn->close();
    return $dkims;
  }

/**
    * Set the ownership of the dkim files to opendkim for user and group
    *
    * @param array $fd_dkims Froxlors dkim settings
    * @return void
  */
  function set_ownership($fd_dkims)
  {

if (file_exists($fd_dkims['dkim_prefix'])):
      $d = opendir ($fd_dkims['dkim_prefix']);
      while(($file = readdir($d)) !== false):
       if ($file != "." && $file != ".."):
         $typepath = $fd_dkims['dkim_prefix'] . "/" . $file ;
         if (filetype ($typepath) != 'dir'):
            chown($typepath, 'opendkim');
            chgrp($typepath, 'opendkim');         
         endif;
       endif;
      endwhile;
    endif;
    
    return null;
  }

/**
   * Create public files
   *
   * @param array $fd_domains Domain list what should get signed 
   * @param array $fd_dkims Froxlors dkim settings
   *
   * @return bolean 
 */
  function create_public_files($fd_domains, $fd_dkims)
  {
    foreach($fd_domains as $k=>$i):
        $path = "${fd_dkims['dkim_prefix']}/dkim${k}.public";
        if (file_exists($path)):
          $a = file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
          $public_key = "v=DKIM1; k=rsa;p=".$a[1].$a[2].$a[3].$a[4]."\n";
          $file_name = "${fd_dkims['dkim_prefix']}default._domainkey.${fd_domains[$k]}";
          //var_dump($file_name);
          $file = fopen($file_name, "w") or die("Unable to open file!");;
          fwrite($file, $public_key);
        endif;
    endforeach;  
    return 1;
  }

}
?>

```

https://www.besuchet.net/2015/08/dkim-configuration-for-postfix-and-plesk/

Anonymous

Setup Dkim from Froxlor 2.x with Opendkim 07.09.23

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