Import initial du projet Production

Cron/Fpdf/fpdf_protection.php

@@ -0,0 +1,198 @@
+<?php
+/****************************************************************************
+* Software: FPDF_Protection                                                 *
+* Version:  1.06                                                            *
+* Date:     2023-01-01                                                      *
+* Author:   Klemen VODOPIVEC                                                *
+* License:  FPDF                                                            *
+*                                                                           *
+* Thanks:  Cpdf (http://www.ros.co.nz/pdf) was my working sample of how to  *
+*          implement protection in pdf.                                     *
+****************************************************************************/
+
+require('fpdfdraw.php');
+
+function RC4($key, $data)
+{
+	static $last_key, $last_state;
+
+	if($key != $last_key)
+	{
+		$k = str_repeat($key, ceil(256/strlen($key)));
+		$state = range(0, 255);
+		$j = 0;
+		for ($i=0; $i<256; $i++){
+			$t = $state[$i];
+			$j = ($j + $t + ord($k[$i])) % 256;
+			$state[$i] = $state[$j];
+			$state[$j] = $t;
+		}
+		$last_key = $key;
+		$last_state = $state;
+	}
+	else
+		$state = $last_state;
+
+	$len = strlen($data);
+	$a = 0;
+	$b = 0;
+	$out = '';
+	for ($i=0; $i<$len; $i++){
+		$a = ($a+1) % 256;
+		$t = $state[$a];
+		$b = ($b+$t) % 256;
+		$state[$a] = $state[$b];
+		$state[$b] = $t;
+		$k = $state[($state[$a]+$state[$b]) % 256];
+		$out .= chr(ord($data[$i]) ^ $k);
+	}
+	return $out;
+}
+
+class FPDF_Protection extends PDF_Draw
+{
+	protected $encrypted = false;
+	protected $padding;
+	protected $encryption_key;
+	protected $Uvalue;             //U entry in pdf document
+	protected $Ovalue;             //O entry in pdf document
+	protected $Pvalue;             //P entry in pdf document
+	protected $enc_obj_id;         //encryption object id
+
+	/**
+	* Function to set permissions as well as user and owner passwords
+	*
+	* - permissions is an array with values taken from the following list:
+	*   copy, print, modify, annot-forms
+	*   If a value is present it means that the permission is granted
+	* - If a user password is set, user will be prompted before document is opened
+	* - If an owner password is set, document can be opened in privilege mode with no
+	*   restriction if that password is entered
+	*/
+	function SetProtection($permissions=array(), $user_pass='', $owner_pass=null)
+	{
+		$options = array('print' => 4, 'modify' => 8, 'copy' => 16, 'annot-forms' => 32 );
+		$protection = 192;
+		foreach($permissions as $permission)
+		{
+			if (!isset($options[$permission]))
+				$this->Error('Incorrect permission: '.$permission);
+			$protection += $options[$permission];
+		}
+		if ($owner_pass === null)
+			$owner_pass = uniqid(rand());
+		$this->encrypted = true;
+		$this->padding = "\x28\xBF\x4E\x5E\x4E\x75\x8A\x41\x64\x00\x4E\x56\xFF\xFA\x01\x08".
+						"\x2E\x2E\x00\xB6\xD0\x68\x3E\x80\x2F\x0C\xA9\xFE\x64\x53\x69\x7A";
+		$this->_generateencryptionkey($user_pass, $owner_pass, $protection);
+	}
+
+/****************************************************************************
+*                                                                           *
+*                              Private methods                              *
+*                                                                           *
+****************************************************************************/
+
+	function _putstream($s)
+	{
+		if ($this->encrypted)
+			$s = RC4($this->_objectkey($this->n), $s);
+		parent::_putstream($s);
+	}
+
+	function _textstring($s)
+	{
+		if (!$this->_isascii($s))
+			$s = $this->_UTF8toUTF16($s);
+		if ($this->encrypted)
+			$s = RC4($this->_objectkey($this->n), $s);
+		return '('.$this->_escape($s).')';
+	}
+
+	/**
+	* Compute key depending on object number where the encrypted data is stored
+	*/
+	function _objectkey($n)
+	{
+		return substr($this->_md5_16($this->encryption_key.pack('VXxx',$n)),0,10);
+	}
+
+	function _putresources()
+	{
+		parent::_putresources();
+		if ($this->encrypted) {
+			$this->_newobj();
+			$this->enc_obj_id = $this->n;
+			$this->_put('<<');
+			$this->_putencryption();
+			$this->_put('>>');
+			$this->_put('endobj');
+		}
+	}
+
+	function _putencryption()
+	{
+		$this->_put('/Filter /Standard');
+		$this->_put('/V 1');
+		$this->_put('/R 2');
+		$this->_put('/O ('.$this->_escape($this->Ovalue).')');
+		$this->_put('/U ('.$this->_escape($this->Uvalue).')');
+		$this->_put('/P '.$this->Pvalue);
+	}
+
+	function _puttrailer()
+	{
+		parent::_puttrailer();
+		if ($this->encrypted) {
+			$this->_put('/Encrypt '.$this->enc_obj_id.' 0 R');
+			$this->_put('/ID [()()]');
+		}
+	}
+
+	/**
+	* Get MD5 as binary string
+	*/
+	function _md5_16($string)
+	{
+		return md5($string, true);
+	}
+
+	/**
+	* Compute O value
+	*/
+	function _Ovalue($user_pass, $owner_pass)
+	{
+		$tmp = $this->_md5_16($owner_pass);
+		$owner_RC4_key = substr($tmp,0,5);
+		return RC4($owner_RC4_key, $user_pass);
+	}
+
+	/**
+	* Compute U value
+	*/
+	function _Uvalue()
+	{
+		return RC4($this->encryption_key, $this->padding);
+	}
+
+	/**
+	* Compute encryption key
+	*/
+	function _generateencryptionkey($user_pass, $owner_pass, $protection)
+	{
+		// Pad passwords
+		$user_pass = substr($user_pass.$this->padding,0,32);
+		$owner_pass = substr($owner_pass.$this->padding,0,32);
+		// Compute O value
+		$this->Ovalue = $this->_Ovalue($user_pass,$owner_pass);
+		// Compute encyption key
+		$tmp = $this->_md5_16($user_pass.$this->Ovalue.chr($protection)."\xFF\xFF\xFF");
+		$this->encryption_key = substr($tmp,0,5);
+		// Compute U value
+		$this->Uvalue = $this->_Uvalue();
+		// Compute P value
+		$this->Pvalue = -(($protection^255)+1);
+	}
+}
+
+?>