Browse Source

implement one time passwords using TOTP

Andrew Dolgov 8 years ago
parent
commit
fb70f26ed9
100 changed files with 3827 additions and 3 deletions
  1. 43 1
      classes/auth/internal.php
  2. 84 1
      classes/pref/prefs.php
  3. 1 1
      include/functions.php
  4. 20 0
      lib/otphp/LICENCE
  5. 74 0
      lib/otphp/lib/hotp.php
  6. 120 0
      lib/otphp/lib/otp.php
  7. 27 0
      lib/otphp/lib/otphp.php
  8. 106 0
      lib/otphp/lib/totp.php
  9. 83 0
      lib/otphp/vendor/base32.php
  10. 26 0
      lib/otphp/vendor/libs.php
  11. 38 0
      lib/phpqrcode/CHANGELOG
  12. 67 0
      lib/phpqrcode/INSTALL
  13. 165 0
      lib/phpqrcode/LICENSE
  14. 45 0
      lib/phpqrcode/README
  15. 2 0
      lib/phpqrcode/VERSION
  16. 2875 0
      lib/phpqrcode/bindings/tcpdf/qrcode.php
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+ 43 - 1
classes/auth/internal.php

@@ -6,6 +6,48 @@ class Auth_Internal extends Auth_Base {
 		$pwd_hash1 = encrypt_password($password);
 		$pwd_hash2 = encrypt_password($password, $login);
 		$login = db_escape_string($login);
+		$otp = db_escape_string($_REQUEST["otp"]);
+
+		if (get_schema_version($this->link) > 96) {
+			$result = db_query($this->link, "SELECT otp_enabled,salt FROM ttrss_users WHERE
+				login = '$login'");
+
+			require_once "lib/otphp/vendor/base32.php";
+			require_once "lib/otphp/lib/otp.php";
+			require_once "lib/otphp/lib/totp.php";
+
+			$base32 = new Base32();
+
+			$otp_enabled = sql_bool_to_bool(db_fetch_result($result, 0, "otp_enabled"));
+			$secret = $base32->encode(sha1(db_fetch_result($result, 0, "salt")));
+
+			$topt = new \OTPHP\TOTP($secret);
+			$otp_check = $topt->now();
+
+			if ($otp_enabled) {
+				if ($otp) {
+					if ($otp != $otp_check) {
+						return false;
+					}
+				} else {
+					?><html>
+						<head><title>Tiny Tiny RSS</title></head>
+					<body>
+					<form method="POST">
+						<input type="hidden" name="login_action" value="do_login">
+						<input type="hidden" name="login" value="<?php echo htmlspecialchars($login) ?>">
+						<input type="hidden" name="password" value="<?php echo htmlspecialchars($password) ?>">
+
+						<label><?php echo __("Please enter your one time password:") ?></label>
+						<input type="password" size="6" name="otp"/>
+						<input type="submit" value="Continue"/>
+					</form>
+					</form>
+					<?php
+					exit;
+				}
+			}
+		}
 
 		if (get_schema_version($this->link) > 87) {
 
@@ -104,7 +146,7 @@ class Auth_Internal extends Auth_Base {
 			$new_password_hash = encrypt_password($new_password, $new_salt, true);
 
 			db_query($this->link, "UPDATE ttrss_users SET
-				pwd_hash = '$new_password_hash', salt = '$new_salt'
+				pwd_hash = '$new_password_hash', salt = '$new_salt', otp_enabled = false
 					WHERE id = '$owner_uid'");
 
 			$_SESSION["pwd_hash"] = $new_password_hash;

+ 84 - 1
classes/pref/prefs.php

@@ -154,12 +154,15 @@ class Pref_Prefs extends Handler_Protected {
 
 		print "<table width=\"100%\" class=\"prefPrefsList\">";
 
-		$result = db_query($this->link, "SELECT email,full_name,
+		print "<h2>" . __("Personal data") . "</h2>";
+
+		$result = db_query($this->link, "SELECT email,full_name,otp_enabled,
 			access_level FROM ttrss_users
 			WHERE id = ".$_SESSION["uid"]);
 
 		$email = htmlspecialchars(db_fetch_result($result, 0, "email"));
 		$full_name = htmlspecialchars(db_fetch_result($result, 0, "full_name"));
+		$otp_enabled = sql_bool_to_bool(db_fetch_result($result, 0, "otp_enabled"));
 
 		print "<tr><td width=\"40%\">".__('Full name')."</td>";
 		print "<td class=\"prefValue\"><input dojoType=\"dijit.form.ValidationTextBox\" name=\"full_name\" required=\"1\"
@@ -194,6 +197,8 @@ class Pref_Prefs extends Handler_Protected {
 
 		if ($authenticator && method_exists($authenticator, "change_password")) {
 
+			print "<h2>" . __("Password") . "</h2>";
+
 			$result = db_query($this->link, "SELECT id FROM ttrss_users
 				WHERE id = ".$_SESSION["uid"]." AND pwd_hash
 				= 'SHA1:5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8'");
@@ -249,6 +254,55 @@ class Pref_Prefs extends Handler_Protected {
 
 			print "</form>";
 
+			if ($_SESSION["auth_module"] == "internal") {
+
+				print "<h2>" . __("One time passwords / Authenticator") . "</h2>";
+
+				if ($otp_enabled) {
+
+					print "<p>".__("One time passwords are currently enabled. Change your current password and refresh this page to reconfigure.") . "</p>";
+
+				} else {
+
+					print "<p>".__("You will need a compatible Authenticator to use this. Changing your password would automatically disable OTP.") . "</p>";
+
+					print "<p>".__("Scan the following code by the Authenticator application:")."</p>";
+
+					$csrf_token = $_SESSION["csrf_token"];
+
+					print "<img src=\"backend.php?op=pref-prefs&method=otpqrcode&csrf_token=$csrf_token\">";
+
+					print "<form dojoType=\"dijit.form.Form\" id=\"changeOtpForm\">";
+
+					print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"op\" value=\"pref-prefs\">";
+					print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"method\" value=\"changeotp\">";
+
+					print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
+					evt.preventDefault();
+					if (this.validate()) {
+						notify_progress('Saving data...', true);
+
+						new Ajax.Request('backend.php', {
+							parameters: dojo.objectToQuery(this.getValues()),
+							onComplete: function(transport) {
+								window.location.reload();
+						} });
+
+					}
+					</script>";
+
+					print "<input dojoType=\"dijit.form.CheckBox\" required=\"1\"
+						type=\"checkbox\" id=\"enable_otp\" name=\"enable_otp\"/> ";
+					print "<label for=\"enable_otp\">".__("I have scanned the code and would like to enable OTP")."</label>";
+
+					print "<p><button dojoType=\"dijit.form.Button\" type=\"submit\">".
+						__("Save OTP setting")."</button>";
+
+					print "</form>";
+
+				}
+
+			}
 		}
 
 		print "</div>"; #pane
@@ -571,5 +625,34 @@ class Pref_Prefs extends Handler_Protected {
 	function toggleAdvanced() {
 		$_SESSION["prefs_show_advanced"] = !$_SESSION["prefs_show_advanced"];
 	}
+
+	function otpqrcode() {
+		require_once "lib/otphp/vendor/base32.php";
+		require_once "lib/otphp/lib/otp.php";
+		require_once "lib/otphp/lib/totp.php";
+		require_once "lib/phpqrcode/phpqrcode.php";
+
+		$result = db_query($this->link, "SELECT login,salt
+			FROM ttrss_users
+			WHERE id = ".$_SESSION["uid"]);
+
+		$base32 = new Base32();
+
+		$login = db_fetch_result($result, 0, "login");
+		$secret = $base32->encode(sha1(db_fetch_result($result, 0, "salt")));
+
+		$topt = new \OTPHP\TOTP($secret);
+
+		print QRcode::png($topt->provisioning_uri($login));
+	}
+
+	function changeotp() {
+		$enable_otp = $_REQUEST["enable_otp"];
+
+		if ($enable_otp == "on") {
+			db_query($this->link, "UPDATE ttrss_users SET otp_enabled = true WHERE
+				id = " . $_SESSION["uid"]);
+		}
+	}
 }
 ?>

+ 1 - 1
include/functions.php

@@ -1,6 +1,6 @@
 <?php
 	define('EXPECTED_CONFIG_VERSION', 26);
-	define('SCHEMA_VERSION', 96);
+	define('SCHEMA_VERSION', 97);
 
 	$fetch_last_error = false;
 

+ 20 - 0
lib/otphp/LICENCE

@@ -0,0 +1,20 @@
+Copyright (c) 2011 Le Lag 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

+ 74 - 0
lib/otphp/lib/hotp.php

@@ -0,0 +1,74 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+namespace OTPHP {
+  /**
+   * HOTP - One time password generator 
+   * 
+   * The HOTP class allow for the generation 
+   * and verification of one-time password using 
+   * the HOTP specified algorithm.
+   *
+   * This class is meant to be compatible with 
+   * Google Authenticator
+   *
+   * This class was originally ported from the rotp
+   * ruby library available at https://github.com/mdp/rotp
+   */
+  class HOTP extends OTP {
+    /**
+     *  Get the password for a specific counter value
+     *  @param integer $count the counter which is used to
+     *  seed the hmac hash function.
+     *  @return integer the One Time Password
+     */
+    public function at($count) {
+      return $this->generateOTP($count);
+    }
+
+
+    /**
+     * Verify if a password is valid for a specific counter value
+     *
+     * @param integer $otp the one-time password 
+     * @param integer $counter the counter value
+     * @return  bool true if the counter is valid, false otherwise
+     */
+    public function verify($otp, $counter) {
+      return ($otp == $this->at($counter));
+    }
+
+    /**
+     * Returns the uri for a specific secret for hotp method.
+     * Can be encoded as a image for simple configuration in 
+     * Google Authenticator.
+     *
+     * @param string $name the name of the account / profile
+     * @param integer $initial_count the initial counter 
+     * @return string the uri for the hmac secret
+     */
+    public function provisioning_uri($name, $initial_count) {
+      return "otpauth://hotp/".urlencode($name)."?secret={$this->secret}&counter=$initial_count";
+    }
+  }
+
+}

+ 120 - 0
lib/otphp/lib/otp.php

@@ -0,0 +1,120 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+namespace OTPHP {
+/**
+ * One Time Password Generator 
+ * 
+ * The OTP class allow the generation of one-time
+ * password that is described in rfc 4xxx.
+ * 
+ * This is class is meant to be compatible with 
+ * Google Authenticator.
+ *
+ * This class was originally ported from the rotp
+ * ruby library available at https://github.com/mdp/rotp
+ */
+class OTP {
+    /**
+     * The base32 encoded secret key
+     * @var string
+     */
+    public $secret;
+
+    /**
+     * The algorithm used for the hmac hash function
+     * @var string
+     */
+    public $digest;
+
+    /**
+     * The number of digits in the one-time password
+     * @var integer
+     */ 
+    public $digits;
+
+    /**
+     * Constructor for the OTP class
+     * @param string $secret the secret key
+     * @param array $opt options array can contain the
+     * following keys :
+     *   @param integer digits : the number of digits in the one time password
+     *   Currently Google Authenticator only support 6. Defaults to 6.
+     *   @param string digest : the algorithm used for the hmac hash function
+     *   Google Authenticator only support sha1. Defaults to sha1
+     *
+     * @return new OTP class.
+     */
+    public function __construct($secret, $opt = Array()) {
+      $this->digits = isset($opt['digits']) ? $opt['digits'] : 6;
+      $this->digest = isset($opt['digest']) ? $opt['digest'] : 'sha1';
+      $this->secret = $secret;
+    }
+
+    /**
+     * Generate a one-time password
+     *
+     * @param integer $input : number used to seed the hmac hash function.
+     * This number is usually a counter (HOTP) or calculated based on the current
+     * timestamp (see TOTP class).
+     * @return integer the one-time password 
+     */
+    public function generateOTP($input) {
+      $hash = hash_hmac($this->digest, $this->intToBytestring($input), $this->byteSecret());
+      foreach(str_split($hash, 2) as $hex) { // stupid PHP has bin2hex but no hex2bin WTF
+        $hmac[] = hexdec($hex);
+      }
+      $offset = $hmac[19] & 0xf;
+      $code = ($hmac[$offset+0] & 0x7F) << 24 |
+        ($hmac[$offset + 1] & 0xFF) << 16 |
+        ($hmac[$offset + 2] & 0xFF) << 8 |
+        ($hmac[$offset + 3] & 0xFF);
+      return $code % pow(10, $this->digits);
+    }
+
+    /**
+     * Returns the binary value of the base32 encoded secret
+     * @access private
+     * This method should be private but was left public for
+     * phpunit tests to work.
+     * @return binary secret key
+     */
+    public function byteSecret() {
+      return \Base32::decode($this->secret);
+    }
+
+    /**
+     * Turns an integer in a OATH bytestring
+     * @param integer $int
+     * @access private
+     * @return string bytestring
+     */
+    public function intToBytestring($int) {
+      $result = Array();
+      while($int != 0) {
+        $result[] = chr($int & 0xFF);
+        $int >>= 8;
+      }
+      return str_pad(join(array_reverse($result)), 8, "\000", STR_PAD_LEFT);
+    }
+  }
+}

+ 27 - 0
lib/otphp/lib/otphp.php

@@ -0,0 +1,27 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+require_once dirname(__FILE__).'/../vendor/libs.php';
+require_once dirname(__FILE__).'/otp.php';
+require_once dirname(__FILE__).'/hotp.php';
+require_once dirname(__FILE__).'/totp.php';
+

+ 106 - 0
lib/otphp/lib/totp.php

@@ -0,0 +1,106 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+namespace OTPHP {
+  /**
+   * TOTP - One time password generator 
+   * 
+   * The TOTP class allow for the generation 
+   * and verification of one-time password using 
+   * the TOTP specified algorithm.
+   *
+   * This class is meant to be compatible with 
+   * Google Authenticator
+   *
+   * This class was originally ported from the rotp
+   * ruby library available at https://github.com/mdp/rotp
+   */
+  class TOTP extends OTP {
+    /**
+     * The interval in seconds for a one-time password timeframe
+     * Defaults to 30
+     * @var integer
+     */
+    public $interval;
+
+    public function __construct($s, $opt = Array()) {
+      $this->interval = isset($opt['interval']) ? $opt['interval'] : 30;
+      parent::__construct($s, $opt);
+    }
+
+    /**
+     *  Get the password for a specific timestamp value 
+     *
+     *  @param integer $timestamp the timestamp which is timecoded and 
+     *  used to seed the hmac hash function.
+     *  @return integer the One Time Password
+     */
+    public function at($timestamp) {
+      return $this->generateOTP($this->timecode($timestamp));
+    }
+
+    /**
+     *  Get the password for the current timestamp value 
+     *
+     *  @return integer the current One Time Password
+     */
+    public function now() {
+      return $this->generateOTP($this->timecode(time()));
+    }
+
+    /**
+     * Verify if a password is valid for a specific counter value
+     *
+     * @param integer $otp the one-time password 
+     * @param integer $timestamp the timestamp for the a given time, defaults to current time.
+     * @return  bool true if the counter is valid, false otherwise
+     */
+    public function verify($otp, $timestamp = null) {
+      if($timestamp === null)
+        $timestamp = time();
+      return ($otp == $this->at($timestamp));
+    }
+
+    /**
+     * Returns the uri for a specific secret for totp method.
+     * Can be encoded as a image for simple configuration in 
+     * Google Authenticator.
+     *
+     * @param string $name the name of the account / profile
+     * @return string the uri for the hmac secret
+     */
+    public function provisioning_uri($name) {
+      return "otpauth://totp/".urlencode($name)."?secret={$this->secret}";
+    }
+
+    /**
+     * Transform a timestamp in a counter based on specified internal
+     *
+     * @param integer $timestamp
+     * @return integer the timecode
+     */
+    protected function timecode($timestamp) {
+      return (int)( (((int)$timestamp * 1000) / ($this->interval * 1000)));
+    }
+  }
+
+}

+ 83 - 0
lib/otphp/vendor/base32.php

@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * Encode in Base32 based on RFC 4648.
+ * Requires 20% more space than base64  
+ * Great for case-insensitive filesystems like Windows and URL's  (except for = char which can be excluded using the pad option for urls)
+ *
+ * @package default
+ * @author Bryan Ruiz
+ **/
+class Base32 {
+
+   private static $map = array(
+        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', //  7
+        'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 15
+        'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 23
+        'Y', 'Z', '2', '3', '4', '5', '6', '7', // 31
+        '='  // padding char
+    );
+    
+   private static $flippedMap = array(
+        'A'=>'0', 'B'=>'1', 'C'=>'2', 'D'=>'3', 'E'=>'4', 'F'=>'5', 'G'=>'6', 'H'=>'7',
+        'I'=>'8', 'J'=>'9', 'K'=>'10', 'L'=>'11', 'M'=>'12', 'N'=>'13', 'O'=>'14', 'P'=>'15',
+        'Q'=>'16', 'R'=>'17', 'S'=>'18', 'T'=>'19', 'U'=>'20', 'V'=>'21', 'W'=>'22', 'X'=>'23',
+        'Y'=>'24', 'Z'=>'25', '2'=>'26', '3'=>'27', '4'=>'28', '5'=>'29', '6'=>'30', '7'=>'31'
+    );
+    
+    /**
+     *    Use padding false when encoding for urls
+     *
+     * @return base32 encoded string
+     * @author Bryan Ruiz
+     **/
+    public static function encode($input, $padding = true) {
+        if(empty($input)) return "";
+        $input = str_split($input);
+        $binaryString = "";
+        for($i = 0; $i < count($input); $i++) {
+            $binaryString .= str_pad(base_convert(ord($input[$i]), 10, 2), 8, '0', STR_PAD_LEFT);
+        }
+        $fiveBitBinaryArray = str_split($binaryString, 5);
+        $base32 = "";
+        $i=0;
+        while($i < count($fiveBitBinaryArray)) {    
+            $base32 .= self::$map[base_convert(str_pad($fiveBitBinaryArray[$i], 5,'0'), 2, 10)];
+            $i++;
+        }
+        if($padding && ($x = strlen($binaryString) % 40) != 0) {
+            if($x == 8) $base32 .= str_repeat(self::$map[32], 6);
+            else if($x == 16) $base32 .= str_repeat(self::$map[32], 4);
+            else if($x == 24) $base32 .= str_repeat(self::$map[32], 3);
+            else if($x == 32) $base32 .= self::$map[32];
+        }
+        return $base32;
+    }
+    
+    public static function decode($input) {
+        if(empty($input)) return;
+        $paddingCharCount = substr_count($input, self::$map[32]);
+        $allowedValues = array(6,4,3,1,0);
+        if(!in_array($paddingCharCount, $allowedValues)) return false;
+        for($i=0; $i<4; $i++){ 
+            if($paddingCharCount == $allowedValues[$i] && 
+                substr($input, -($allowedValues[$i])) != str_repeat(self::$map[32], $allowedValues[$i])) return false;
+        }
+        $input = str_replace('=','', $input);
+        $input = str_split($input);
+        $binaryString = "";
+        for($i=0; $i < count($input); $i = $i+8) {
+            $x = "";
+            if(!in_array($input[$i], self::$map)) return false;
+            for($j=0; $j < 8; $j++) {
+                $x .= str_pad(base_convert(@self::$flippedMap[@$input[$i + $j]], 10, 2), 5, '0', STR_PAD_LEFT);
+            }
+            $eightBits = str_split($x, 8);
+            for($z = 0; $z < count($eightBits); $z++) {
+                $binaryString .= ( ($y = chr(base_convert($eightBits[$z], 2, 10))) || ord($y) == 48 ) ? $y:"";
+            }
+        }
+        return $binaryString;
+    }
+}
+

+ 26 - 0
lib/otphp/vendor/libs.php

@@ -0,0 +1,26 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// Add any needed third party library to this directory
+
+//require_once dirname(__FILE__).'/some_lib/lib.php';
+require_once dirname(__FILE__).'/base32.php';

+ 38 - 0
lib/phpqrcode/CHANGELOG

@@ -0,0 +1,38 @@
+* 1.0.0 build 2010031920 
+
+  - first public release
+  - help in readme, install
+  - cleanup ans separation of QRtools and QRspec
+  - now TCPDF binding requires minimal changes in TCPDF, having most of job
+    done in QRtools tcpdfBarcodeArray
+  - nicer QRtools::timeBenchmark output
+  - license and copyright notices in files
+  - indent cleanup - from tab to 4spc, keep it that way please :)
+  - sf project, repository, wiki
+  - simple code generator in index.php
+  
+* 1.1.0 build 2010032113
+
+  - added merge tool wich generate merged version of code
+    located in phpqrcode.php
+  - splited qrconst.php from qrlib.php
+  
+* 1.1.1 build 2010032405
+
+  - patch by Rick Seymour allowing saving PNG and displaying it at the same time
+  - added version info in VERSION file
+  - modified merge tool to include version info into generated file
+  - fixed e-mail in almost all head comments
+  
+* 1.1.2 build 2010032722
+
+  - full integration with TCPDF thanks to Nicola Asuni, it's author
+  - fixed bug with alphanumeric encoding detection
+  
+* 1.1.3 build 2010081807
+
+  - short opening tags replaced with standard ones
+  
+* 1.1.4 build 2010100721
+
+  - added missing static keyword QRinput::check (found by Luke Brookhart, Onjax LLC)

+ 67 - 0
lib/phpqrcode/INSTALL

@@ -0,0 +1,67 @@
+== REQUIREMENTS ==
+
+ * PHP5
+ * PHP GD2 extension with JPEG and PNG support
+ 
+== INSTALLATION ==
+
+If you want to recreate cache by yourself make sure cache directory is
+writable and you have permisions to write into it. Also make sure you are
+able to read files in it if you have cache option enabled
+ 
+== CONFIGURATION ==
+
+Feel free to modify config constants in qrconfig.php file. Read about it in
+provided comments and project wiki page (links in README file)
+
+== QUICK START ==
+
+Notice: probably you should'nt use all of this in same script :)
+
+<?phpb
+
+//include only that one, rest required files will be included from it
+include "qrlib.php"
+
+//write code into file, Error corection lecer is lowest, L (one form: L,M,Q,H)
+//each code square will be 4x4 pixels (4x zoom)
+//code will have 2 code squares white boundary around 
+
+QRcode::png('PHP QR Code :)', 'test.png', 'L', 4, 2);
+
+//same as above but outputs file directly into browser (with appr. header etc.)
+//all other settings are default
+//WARNING! it should be FIRST and ONLY output generated by script, otherwise
+//rest of output will land inside PNG binary, breaking it for sure
+QRcode::png('PHP QR Code :)');
+
+//show benchmark
+QRtools::timeBenchmark();
+
+//rebuild cache
+QRtools::buildCache();
+
+//code generated in text mode - as a binary table
+//then displayed out as HTML using Unicode block building chars :)
+$tab = $qr->encode('PHP QR Code :)');
+QRspec::debug($tab, true);
+
+== TCPDF INTEGRATION ==
+
+Inside bindings/tcpdf you will find slightly modified 2dbarcodes.php.
+Instal phpqrcode liblaty inside tcpdf folder, then overwrite (or merge)
+2dbarcodes.php 
+
+Then use similar as example #50 from TCPDF examples:
+
+<?php
+
+$style = array(
+    'border' => true,
+    'padding' => 4,
+    'fgcolor' => array(0,0,0),
+    'bgcolor' => false, //array(255,255,255)
+);
+
+//code name: QR, specify error correction level after semicolon (L,M,Q,H)
+$pdf->write2DBarcode('PHP QR Code :)', 'QR,L', '', '', 30, 30, $style, 'N');

+ 165 - 0
lib/phpqrcode/LICENSE

@@ -0,0 +1,165 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

+ 45 - 0
lib/phpqrcode/README

@@ -0,0 +1,45 @@
+This is PHP implementation of QR Code 2-D barcode generator. It is pure-php
+LGPL-licensed implementation based on C libqrencode by Kentaro Fukuchi.
+
+== LICENSING ==
+
+Copyright (C) 2010 by Dominik Dzienia 
+
+This library is free software; you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the Free
+Software Foundation; either version 3 of the License, or any later version.
+
+This library is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU Lesser General Public License (LICENSE file)
+for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this library; if not, write to the Free Software Foundation, Inc., 51
+Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+== INSTALATION AND USAGE ==
+
+ * INSTALL file
+ * http://sourceforge.net/apps/mediawiki/phpqrcode/index.php?title=Main_Page
+
+== CONTACT ==
+
+Fell free to contact me via e-mail (deltalab at poczta dot fm) or using
+folowing project pages:
+
+ * http://sourceforge.net/projects/phpqrcode/
+ * http://phpqrcode.sourceforge.net/
+  
+== ACKNOWLEDGMENTS ==
+
+Based on C libqrencode library (ver. 3.1.1) 
+Copyright (C) 2006-2010 by Kentaro Fukuchi
+http://megaui.net/fukuchi/works/qrencode/index.en.html
+
+QR Code is registered trademarks of DENSO WAVE INCORPORATED in JAPAN and other
+countries.
+
+Reed-Solomon code encoder is written by Phil Karn, KA9Q.
+Copyright (C) 2002, 2003, 2004, 2006 Phil Karn, KA9Q
+ 

+ 2 - 0
lib/phpqrcode/VERSION

@@ -0,0 +1,2 @@
+1.1.4
+2010100721

+ 2875 - 0
lib/phpqrcode/bindings/tcpdf/qrcode.php

@@ -0,0 +1,2875 @@
+<?php
+//============================================================+
+// File name   : qrcode.php
+// Begin       : 2010-03-22
+// Last Update : 2010-03-29
+// Version     : 1.0.002
+// License     : GNU LGPL v.3 (http://www.gnu.org/copyleft/lesser.html)
+// 	----------------------------------------------------------------------------
+//
+// 	This library is free software; you can redistribute it and/or
+// 	modify it under the terms of the GNU Lesser General Public
+// 	License as published by the Free Software Foundation; either
+// 	version 3 of the License, or any later version.
+//
+// 	This library is distributed in the hope that it will be useful,
+// 	but WITHOUT ANY WARRANTY; without even the implied warranty of
+// 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// 	Lesser General Public License for more details.
+//
+// 	You should have received a copy of the GNU Lesser General Public
+// 	License along with this library; if not, write to the Free Software
+// 	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+//  or browse http://www.gnu.org/copyleft/lesser.html
+//
+//  ----------------------------------------------------------------------------
+//
+// DESCRIPTION :
+//
+// Class to create QR-code arrays for TCPDF class.
+// QR Code symbol is a 2D barcode that can be scanned by
+// handy terminals such as a mobile phone with CCD.
+// The capacity of QR Code is up to 7000 digits or 4000
+// characters, and has high robustness.
+// This class supports QR Code model 2, described in
+// JIS (Japanese Industrial Standards) X0510:2004
+// or ISO/IEC 18004.
+// Currently the following features are not supported:
+// ECI and FNC1 mode, Micro QR Code, QR Code model 1,
+// Structured mode.
+//
+// This class is derived from the following projects:
+// ---------------------------------------------------------
+// "PHP QR Code encoder"
+// License: GNU-LGPLv3
+// Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
+// http://phpqrcode.sourceforge.net/
+// https://sourceforge.net/projects/phpqrcode/
+//
+// The "PHP QR Code encoder" is based on
+// "C libqrencode library" (ver. 3.1.1)
+// License: GNU-LGPL 2.1
+// Copyright (C) 2006-2010 by Kentaro Fukuchi
+// http://megaui.net/fukuchi/works/qrencode/index.en.html
+//
+// Reed-Solomon code encoder is written by Phil Karn, KA9Q.
+// Copyright (C) 2002-2006 Phil Karn, KA9Q
+//
+// QR Code is registered trademark of DENSO WAVE INCORPORATED
+// http://www.denso-wave.com/qrcode/index-e.html
+// ---------------------------------------------------------
+//
+// Author: Nicola Asuni
+//
+// (c) Copyright 2010:
+//               Nicola Asuni
+//               Tecnick.com S.r.l.
+//               Via della Pace, 11
+//               09044 Quartucciu (CA)
+//               ITALY
+//               www.tecnick.com
+//               [email protected]
+//============================================================+
+
+/**
+ * Class to create QR-code arrays for TCPDF class.
+ * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
+ * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
+ * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
+ * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
+ *
+ * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
+ * Please read comments on this class source file for full copyright and license information.
+ *
+ * @package com.tecnick.tcpdf
+ * @abstract Class for generating QR-code array for TCPDF.
+ * @author Nicola Asuni
+ * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - [email protected]
+ * @link http://www.tcpdf.org
+ * @license http://www.gnu.org/copyleft/lesser.html LGPL
+ * @version 1.0.002
+ */
+
+// definitions
+if (!defined('QRCODEDEFS')) {
+
+	/**
+	 * Indicate that definitions for this class are set
+	 */
+	define('QRCODEDEFS', true);
+
+	// -----------------------------------------------------
+
+	// Encoding modes (characters which can be encoded in QRcode)
+
+	/**
+	 * Encoding mode
+	 */
+	define('QR_MODE_NL', -1);
+
+	/**
+	 * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
+	 */
+	define('QR_MODE_NM', 0);
+
+	/**
+	 * Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.
+	 */
+	define('QR_MODE_AN', 1);
+
+	/**
+	 * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
+	 */
+	define('QR_MODE_8B', 2);
+
+	/**
+	 * Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.
+	 */
+	define('QR_MODE_KJ', 3);
+
+	/**
+	 * Encoding mode STRUCTURED (currently unsupported)
+	 */
+	define('QR_MODE_ST', 4);
+
+	// -----------------------------------------------------
+
+	// Levels of error correction.
+	// QRcode has a function of an error correcting for miss reading that white is black.
+	// Error correcting is defined in 4 level as below.
+
+	/**
+	 * Error correction level L : About 7% or less errors can be corrected.
+	 */
+	define('QR_ECLEVEL_L', 0);
+
+	/**
+	 * Error correction level M : About 15% or less errors can be corrected.
+	 */
+	define('QR_ECLEVEL_M', 1);
+
+	/**
+	 * Error correction level Q : About 25% or less errors can be corrected.
+	 */
+	define('QR_ECLEVEL_Q', 2);
+
+	/**
+	 * Error correction level H : About 30% or less errors can be corrected.
+	 */
+	define('QR_ECLEVEL_H', 3);
+
+	// -----------------------------------------------------
+
+	// Version. Size of QRcode is defined as version.
+	// Version is from 1 to 40.
+	// Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
+	// So version 40 is 177*177 matrix.
+
+	/**
+	 * Maximum QR Code version.
+	 */
+	define('QRSPEC_VERSION_MAX', 40);
+
+	/**
+	 * Maximum matrix size for maximum version (version 40 is 177*177 matrix).
+	 */
+    define('QRSPEC_WIDTH_MAX', 177);
+
+	// -----------------------------------------------------
+
+	/**
+	 * Matrix index to get width from $capacity array.
+	 */
+    define('QRCAP_WIDTH',    0);
+
+    /**
+	 * Matrix index to get number of words from $capacity array.
+	 */
+    define('QRCAP_WORDS',    1);
+
+    /**
+	 * Matrix index to get remainder from $capacity array.
+	 */
+    define('QRCAP_REMINDER', 2);
+
+    /**
+	 * Matrix index to get error correction level from $capacity array.
+	 */
+    define('QRCAP_EC',       3);
+
+	// -----------------------------------------------------
+
+	// Structure (currently usupported)
+
+	/**
+	 * Number of header bits for structured mode
+	 */
+    define('STRUCTURE_HEADER_BITS',  20);
+
+    /**
+	 * Max number of symbols for structured mode
+	 */
+    define('MAX_STRUCTURED_SYMBOLS', 16);
+
+	// -----------------------------------------------------
+
+    // Masks
+
+    /**
+	 * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
+	 */
+    define('N1',  3);
+
+    /**
+	 * Down point base value for case 2 mask pattern (module block of same color)
+	 */
+	define('N2',  3);
+
+    /**
+	 * Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)
+	 */
+	define('N3', 40);
+
+    /**
+	 * Down point base value for case 4 mask pattern (ration of dark modules in whole)
+	 */
+	define('N4', 10);
+
+	// -----------------------------------------------------
+
+	// Optimization settings
+
+	/**
+	 * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
+	 */
+	define('QR_FIND_BEST_MASK', true);
+
+	/**
+	 * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
+	 */
+	define('QR_FIND_FROM_RANDOM', 2);
+
+	/**
+	 * when QR_FIND_BEST_MASK === false
+	 */
+	define('QR_DEFAULT_MASK', 2);
+
+	// -----------------------------------------------------
+
+} // end of definitions
+
+// #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
+
+if (!class_exists('QRcode', false)) {
+
+	// for compaibility with PHP4
+	if (!function_exists('str_split')) {
+    	/**
+    	 * Convert a string to an array (needed for PHP4 compatibility)
+    	 * @param string $string The input string.
+    	 * @param int $split_length Maximum length of the chunk.
+    	 * @return  If the optional split_length  parameter is specified, the returned array will be broken down into chunks with each being split_length  in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element.
+    	 */
+		function str_split($string, $split_length=1) {
+			if ((strlen($string) > $split_length) OR (!$split_length)) {
+				do {
+					$c = strlen($string);
+					$parts[] = substr($string, 0, $split_length);
+					$string = substr($string, $split_length);
+				} while ($string !== false);
+			} else {
+				$parts = array($string);
+			}
+			return $parts;
+		}
+	}
+
+	// #####################################################
+
+	/**
+	 * Class to create QR-code arrays for TCPDF class.
+	 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
+	 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
+	 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
+	 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
+	 *
+	 * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
+	 * Please read comments on this class source file for full copyright and license information.
+	 *
+	 * @name QRcode
+	 * @package com.tecnick.tcpdf
+	 * @abstract Class for generating QR-code array for TCPDF.
+	 * @author Nicola Asuni
+	 * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - [email protected]
+	 * @link http://www.tcpdf.org
+	 * @license http://www.gnu.org/copyleft/lesser.html LGPL
+	 * @version 1.0.002
+	 */
+	class QRcode {
+
+		/**
+		 * @var barcode array to be returned which is readable by TCPDF
+		 * @access protected
+		 */
+		protected $barcode_array = array();
+
+		/**
+		 * @var QR code version. Size of QRcode is defined as version. Version is from 1 to 40. Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. So version 40 is 177*177 matrix.
+		 * @access protected
+		 */
+		protected $version = 0;
+
+		/**
+		 * @var Levels of error correction. See definitions for possible values.
+		 * @access protected
+		 */
+		protected $level = QR_ECLEVEL_L;
+
+		/**
+		 * @var Encoding mode
+		 * @access protected
+		 */
+		protected $hint = QR_MODE_8B;
+
+		/**
+		 * @var if true the input string will be converted to uppercase
+		 * @access protected
+		 */
+		protected $casesensitive = true;
+
+		/**
+		 * @var structured QR code (not supported yet)
+		 * @access protected
+		 */
+		protected $structured = 0;
+
+		/**
+		 * @var mask data
+		 * @access protected
+		 */
+		protected $data;
+
+		// FrameFiller
+
+		/**
+		 * @var width
+		 * @access protected
+		 */
+		protected $width;
+
+		/**
+		 * @var frame
+		 * @access protected
+		 */
+		protected $frame;
+
+		/**
+		 * @var X position of bit
+		 * @access protected
+		 */
+		protected $x;
+
+		/**
+		 * @var Y position of bit
+		 * @access protected
+		 */
+		protected $y;
+
+		/**
+		 * @var direction
+		 * @access protected
+		 */
+		protected $dir;
+
+		/**
+		 * @var single bit
+		 * @access protected
+		 */
+		protected $bit;
+
+		// ---- QRrawcode ----
+
+		/**
+		 * @var data code
+		 * @access protected
+		 */
+		protected $datacode = array();
+
+		/**
+		 * @var error correction code
+		 * @access protected
+		 */
+		protected $ecccode = array();
+
+		/**
+		 * @var blocks
+		 * @access protected
+		 */
+		protected $blocks;
+
+		/**
+		 * @var Reed-Solomon blocks
+		 * @access protected
+		 */
+		protected $rsblocks = array(); //of RSblock
+
+		/**
+		 * @var counter
+		 * @access protected
+		 */
+		protected $count;
+
+		/**
+		 * @var data length
+		 * @access protected
+		 */
+		protected $dataLength;
+
+		/**
+		 * @var error correction length
+		 * @access protected
+		 */
+		protected $eccLength;
+
+		/**
+		 * @var b1
+		 * @access protected
+		 */
+		protected $b1;
+
+		// ---- QRmask ----
+
+		/**
+		 * @var run length
+		 * @access protected
+		 */
+		protected $runLength = array();
+
+		// ---- QRsplit ----
+
+		/**
+		 * @var input data string
+		 * @access protected
+		 */
+		protected $dataStr = '';
+
+		/**
+		 * @var input items
+		 * @access protected
+		 */
+		protected $items;
+
+		// Reed-Solomon items
+
+		/**
+		 * @var Reed-Solomon items
+		 * @access protected
+		 */
+		protected $rsitems = array();
+
+		/**
+		 * @var array of frames
+		 * @access protected
+		 */
+		protected $frames = array();
+
+		/**
+		 * @var alphabet-numeric convesion table
+		 * @access protected
+		 */
+		protected $anTable = array(
+			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
+			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
+			36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
+			 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 44, -1, -1, -1, -1, -1, //
+			-1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
+			25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
+			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
+			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1  //
+			);
+
+		/**
+		 * @var array Table of the capacity of symbols
+		 * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
+		 * @access protected
+		 */
+		protected $capacity = array(
+			array(  0,    0, 0, array(   0,    0,    0,    0)), //
+			array( 21,   26, 0, array(   7,   10,   13,   17)), //  1
+			array( 25,   44, 7, array(  10,   16,   22,   28)), //
+			array( 29,   70, 7, array(  15,   26,   36,   44)), //
+			array( 33,  100, 7, array(  20,   36,   52,   64)), //
+			array( 37,  134, 7, array(  26,   48,   72,   88)), //  5
+			array( 41,  172, 7, array(  36,   64,   96,  112)), //
+			array( 45,  196, 0, array(  40,   72,  108,  130)), //
+			array( 49,  242, 0, array(  48,   88,  132,  156)), //
+			array( 53,  292, 0, array(  60,  110,  160,  192)), //
+			array( 57,  346, 0, array(  72,  130,  192,  224)), // 10
+			array( 61,  404, 0, array(  80,  150,  224,  264)), //
+			array( 65,  466, 0, array(  96,  176,  260,  308)), //
+			array( 69,  532, 0, array( 104,  198,  288,  352)), //
+			array( 73,  581, 3, array( 120,  216,  320,  384)), //
+			array( 77,  655, 3, array( 132,  240,  360,  432)), // 15
+			array( 81,  733, 3, array( 144,  280,  408,  480)), //
+			array( 85,  815, 3, array( 168,  308,  448,  532)), //
+			array( 89,  901, 3, array( 180,  338,  504,  588)), //
+			array( 93,  991, 3, array( 196,  364,  546,  650)), //
+			array( 97, 1085, 3, array( 224,  416,  600,  700)), // 20
+			array(101, 1156, 4, array( 224,  442,  644,  750)), //
+			array(105, 1258, 4, array( 252,  476,  690,  816)), //
+			array(109, 1364, 4, array( 270,  504,  750,  900)), //
+			array(113, 1474, 4, array( 300,  560,  810,  960)), //
+			array(117, 1588, 4, array( 312,  588,  870, 1050)), // 25
+			array(121, 1706, 4, array( 336,  644,  952, 1110)), //
+			array(125, 1828, 4, array( 360,  700, 1020, 1200)), //
+			array(129, 1921, 3, array( 390,  728, 1050, 1260)), //
+			array(133, 2051, 3, array( 420,  784, 1140, 1350)), //
+			array(137, 2185, 3, array( 450,  812, 1200, 1440)), // 30
+			array(141, 2323, 3, array( 480,  868, 1290, 1530)), //
+			array(145, 2465, 3, array( 510,  924, 1350, 1620)), //
+			array(149, 2611, 3, array( 540,  980, 1440, 1710)), //
+			array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
+			array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
+			array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
+			array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
+			array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
+			array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
+			array(177, 3706, 0, array( 750, 1372, 2040, 2430))  // 40
+		);
+
+		/**
+		 * @var array Length indicator
+		 * @access protected
+		 */
+		protected $lengthTableBits = array(
+			array(10, 12, 14),
+			array( 9, 11, 13),
+			array( 8, 16, 16),
+			array( 8, 10, 12)
+		);
+
+		/**
+		 * @var array Table of the error correction code (Reed-Solomon block)
+		 * See Table 12-16 (pp.30-36), JIS X0510:2004.
+		 * @access protected
+		 */
+		protected $eccTable = array(
+			array(array( 0,  0), array( 0,  0), array( 0,  0), array( 0,  0)), //
+			array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //  1
+			array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //
+			array(array( 1,  0), array( 1,  0), array( 2,  0), array( 2,  0)), //
+			array(array( 1,  0), array( 2,  0), array( 2,  0), array( 4,  0)), //
+			array(array( 1,  0), array( 2,  0), array( 2,  2), array( 2,  2)), //  5
+			array(array( 2,  0), array( 4,  0), array( 4,  0), array( 4,  0)), //
+			array(array( 2,  0), array( 4,  0), array( 2,  4), array( 4,  1)), //
+			array(array( 2,  0), array( 2,  2), array( 4,  2), array( 4,  2)), //
+			array(array( 2,  0), array( 3,  2), array( 4,  4), array( 4,  4)), //
+			array(array( 2,  2), array( 4,  1), array( 6,  2), array( 6,  2)), // 10
+			array(array( 4,  0), array( 1,  4), array( 4,  4), array( 3,  8)), //
+			array(array( 2,  2), array( 6,  2), array( 4,  6), array( 7,  4)), //
+			array(array( 4,  0), array( 8,  1), array( 8,  4), array(12,  4)), //
+			array(array( 3,  1), array( 4,  5), array(11,  5), array(11,  5)), //
+			array(array( 5,  1), array( 5,  5), array( 5,  7), array(11,  7)), // 15
+			array(array( 5,  1), array( 7,  3), array(15,  2), array( 3, 13)), //
+			array(array( 1,  5), array(10,  1), array( 1, 15), array( 2, 17)), //
+			array(array( 5,  1), array( 9,  4), array(17,  1), array( 2, 19)), //
+			array(array( 3,  4), array( 3, 11), array(17,  4), array( 9, 16)), //
+			array(array( 3,  5), array( 3, 13), array(15,  5), array(15, 10)), // 20
+			array(array( 4,  4), array(17,  0), array(17,  6), array(19,  6)), //
+			array(array( 2,  7), array(17,  0), array( 7, 16), array(34,  0)), //
+			array(array( 4,  5), array( 4, 14), array(11, 14), array(16, 14)), //
+			array(array( 6,  4), array( 6, 14), array(11, 16), array(30,  2)), //
+			array(array( 8,  4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
+			array(array(10,  2), array(19,  4), array(28,  6), array(33,  4)), //
+			array(array( 8,  4), array(22,  3), array( 8, 26), array(12, 28)), //
+			array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
+			array(array( 7,  7), array(21,  7), array( 1, 37), array(19, 26)), //
+			array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
+			array(array(13,  3), array( 2, 29), array(42,  1), array(23, 28)), //
+			array(array(17,  0), array(10, 23), array(10, 35), array(19, 35)), //
+			array(array(17,  1), array(14, 21), array(29, 19), array(11, 46)), //
+			array(array(13,  6), array(14, 23), array(44,  7), array(59,  1)), //
+			array(array(12,  7), array(12, 26), array(39, 14), array(22, 41)), // 35
+			array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
+			array(array(17,  4), array(29, 14), array(49, 10), array(24, 46)), //
+			array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
+			array(array(20,  4), array(40,  7), array(43, 22), array(10, 67)), //
+			array(array(19,  6), array(18, 31), array(34, 34), array(20, 61))  // 40
+		);
+
+		/**
+		 * @var array Positions of alignment patterns.
+		 * This array includes only the second and the third position of the alignment patterns. Rest of them can be calculated from the distance between them.
+		 * See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
+		 * @access protected
+		 */
+		protected $alignmentPattern = array(
+			array( 0,  0),
+			array( 0,  0), array(18,  0), array(22,  0), array(26,  0), array(30,  0), //  1- 5
+			array(34,  0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), //  6-10
+			array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
+			array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
+			array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
+			array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
+			array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
+			array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58)  // 35-40
+		);
+
+		/**
+		 * @var array Version information pattern (BCH coded).
+		 * See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
+		 * size: [QRSPEC_VERSION_MAX - 6]
+		 * @access protected
+		 */
+		protected $versionPattern = array(
+			0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
+			0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
+			0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
+			0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
+			0x27541, 0x28c69
+		);
+
+		/**
+		 * @var array Format information
+		 * @access protected
+		 */
+		protected $formatInfo = array(
+			array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
+			array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
+			array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
+			array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)  //
+		);
+
+
+		// -------------------------------------------------
+		// -------------------------------------------------
+
+
+		/**
+		 * This is the class constructor.
+		 * Creates a QRcode object
+		 * @param string $code code to represent using QRcode
+		 * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
+		 * @access public
+		 * @since 1.0.000
+		 */
+		public function __construct($code, $eclevel = 'L') {
+			$barcode_array = array();
+			if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
+				return false;
+			}
+			// set error correction level
+			$this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
+			if ($this->level === false) {
+				$this->level = QR_ECLEVEL_L;
+			}
+			if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
+				return false;
+			}
+			if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
+				return false;
+			}
+			$this->items = array();
+			$this->encodeString($code);
+			$qrTab = $this->binarize($this->data);
+			$size = count($qrTab);
+			$barcode_array['num_rows'] = $size;
+			$barcode_array['num_cols'] = $size;
+			$barcode_array['bcode'] = array();
+			foreach ($qrTab as $line) {
+				$arrAdd = array();
+				foreach (str_split($line) as $char) {
+					$arrAdd[] = ($char=='1')?1:0;
+				}
+				$barcode_array['bcode'][] = $arrAdd;
+			}
+			$this->barcode_array = $barcode_array;
+		}
+
+		/**
+		 * Returns a barcode array which is readable by TCPDF
+		 * @return array barcode array readable by TCPDF;
+		 * @access public
+		 */
+		public function getBarcodeArray() {
+			return $this->barcode_array;
+		}
+
+		/**
+		 * Convert the frame in binary form
+		 * @param array $frame array to binarize
+		 * @return array frame in binary form
+		 */
+		protected function binarize($frame) {
+			$len = count($frame);
+			// the frame is square (width = height)
+			foreach ($frame as &$frameLine) {
+				for ($i=0; $i<$len; $i++) {
+					$frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
+				}
+			}
+			return $frame;
+		}
+
+		/**
+		 * Encode the input string to QR code
+		 * @param string $string input string to encode
+		 */
+		protected function encodeString($string) {
+			$this->dataStr = $string;
+			if (!$this->casesensitive) {
+				$this->toUpper();
+			}
+			$ret = $this->splitString();
+			if ($ret < 0) {
+				return NULL;
+			}
+			$this->encodeMask(-1);
+		}
+
+		/**
+		 * Encode mask
+		 * @param int $mask masking mode
+		 */
+		protected function encodeMask($mask) {
+			$spec = array(0, 0, 0, 0, 0);
+			$this->datacode = $this->getByteStream($this->items);
+			if (is_null($this->datacode)) {
+				return NULL;
+			}
+			$spec = $this->getEccSpec($this->version, $this->level, $spec);
+			$this->b1 = $this->rsBlockNum1($spec);
+			$this->dataLength = $this->rsDataLength($spec);
+			$this->eccLength = $this->rsEccLength($spec);
+			$this->ecccode = array_fill(0, $this->eccLength, 0);
+			$this->blocks = $this->rsBlockNum($spec);
+			$ret = $this->init($spec);
+			if ($ret < 0) {
+				return NULL;
+			}
+			$this->count = 0;
+			$this->width = $this->getWidth($this->version);
+			$this->frame = $this->newFrame($this->version);
+			$this->x = $this->width - 1;
+			$this->y = $this->width - 1;
+			$this->dir = -1;
+			$this->bit = -1;
+			// inteleaved data and ecc codes
+			for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) {
+				$code = $this->getCode();
+				$bit = 0x80;
+				for ($j=0; $j<8; $j++) {
+					$addr = $this->getNextPosition();
+					$this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
+					$bit = $bit >> 1;
+				}
+			}
+			// remainder bits
+			$j = $this->getRemainder($this->version);
+			for ($i=0; $i<$j; $i++) {
+				$addr = $this->getNextPosition();
+				$this->setFrameAt($addr, 0x02);
+			}
+			// masking
+			$this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
+			if ($mask < 0) {
+				if (QR_FIND_BEST_MASK) {
+					$masked = $this->mask($this->width, $this->frame, $this->level);
+				} else {
+					$masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);
+				}
+			} else {
+				$masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
+			}
+			if ($masked == NULL) {
+				return NULL;
+			}
+			$this->data = $masked;
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// FrameFiller
+
+		/**
+		 * Set frame value at specified position
+		 * @param array $at x,y position
+		 * @param int $val value of the character to set
+		 */
+		protected function setFrameAt($at, $val) {
+			$this->frame[$at['y']][$at['x']] = chr($val);
+		}
+
+		/**
+		 * Get frame value at specified position
+		 * @param array $at x,y position
+		 * @return value at specified position
+		 */
+		protected function getFrameAt($at) {
+			return ord($this->frame[$at['y']][$at['x']]);
+		}
+
+		/**
+		 * Return the next frame position
+		 * @return array of x,y coordinates
+		 */
+		protected function getNextPosition() {
+			do {
+				if ($this->bit == -1) {
+					$this->bit = 0;
+					return array('x'=>$this->x, 'y'=>$this->y);
+				}
+				$x = $this->x;
+				$y = $this->y;
+				$w = $this->width;
+				if ($this->bit == 0) {
+					$x--;
+					$this->bit++;
+				} else {
+					$x++;
+					$y += $this->dir;
+					$this->bit--;
+				}
+				if ($this->dir < 0) {
+					if ($y < 0) {
+						$y = 0;
+						$x -= 2;
+						$this->dir = 1;
+						if ($x == 6) {
+							$x--;
+							$y = 9;
+						}
+					}
+				} else {
+					if ($y == $w) {
+						$y = $w - 1;
+						$x -= 2;
+						$this->dir = -1;
+						if ($x == 6) {
+							$x--;
+							$y -= 8;
+						}
+					}
+				}
+				if (($x < 0) OR ($y < 0)) {
+					return NULL;
+				}
+				$this->x = $x;
+				$this->y = $y;
+			} while(ord($this->frame[$y][$x]) & 0x80);
+			return array('x'=>$x, 'y'=>$y);
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// QRrawcode
+
+		/**
+		 * Initialize code.
+		 * @param array $spec array of ECC specification
+		 * @return 0 in case of success, -1 in case of error
+		 */
+		protected function init($spec) {
+			$dl = $this->rsDataCodes1($spec);
+			$el = $this->rsEccCodes1($spec);
+			$rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
+			$blockNo = 0;
+			$dataPos = 0;
+			$eccPos = 0;
+			$endfor = $this->rsBlockNum1($spec);
+			for ($i=0; $i < $endfor; ++$i) {
+				$ecc = array_slice($this->ecccode, $eccPos);
+				$this->rsblocks[$blockNo] = array();
+				$this->rsblocks[$blockNo]['dataLength'] = $dl;
+				$this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
+				$this->rsblocks[$blockNo]['eccLength'] = $el;
+				$ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
+				$this->rsblocks[$blockNo]['ecc'] = $ecc;
+				$this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc);
+				$dataPos += $dl;
+				$eccPos += $el;
+				$blockNo++;
+			}
+			if ($this->rsBlockNum2($spec) == 0) {
+				return 0;
+			}
+			$dl = $this->rsDataCodes2($spec);
+			$el = $this->rsEccCodes2($spec);
+			$rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
+			if ($rs == NULL) {
+				return -1;
+			}
+			$endfor = $this->rsBlockNum2($spec);
+			for ($i=0; $i < $endfor; ++$i) {
+				$ecc = array_slice($this->ecccode, $eccPos);
+				$this->rsblocks[$blockNo] = array();
+				$this->rsblocks[$blockNo]['dataLength'] = $dl;
+				$this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
+				$this->rsblocks[$blockNo]['eccLength'] = $el;
+				$ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
+				$this->rsblocks[$blockNo]['ecc'] = $ecc;
+				$this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
+				$dataPos += $dl;
+				$eccPos += $el;
+				$blockNo++;
+			}
+			return 0;
+		}
+
+		/**
+		 * Return Reed-Solomon block code.
+		 * @return array rsblocks
+		 */
+		protected function getCode() {
+			if ($this->count < $this->dataLength) {
+				$row = $this->count % $this->blocks;
+				$col = $this->count / $this->blocks;
+				if ($col >= $this->rsblocks[0]['dataLength']) {
+					$row += $this->b1;
+				}
+				$ret = $this->rsblocks[$row]['data'][$col];
+			} elseif ($this->count < $this->dataLength + $this->eccLength) {
+				$row = ($this->count - $this->dataLength) % $this->blocks;
+				$col = ($this->count - $this->dataLength) / $this->blocks;
+				$ret = $this->rsblocks[$row]['ecc'][$col];
+			} else {
+				return 0;
+			}
+			$this->count++;
+			return $ret;
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// QRmask
+
+		/**
+		 * Write Format Information on frame and returns the number of black bits
+		 * @param int $width frame width
+		 * @param array $frame frame
+		 * @param array $mask masking mode
+		 * @param int $level error correction level
+		 * @return int blacks
+		 */
+		 protected function writeFormatInformation($width, &$frame, $mask, $level) {
+			$blacks = 0;
+			$format =  $this->getFormatInfo($mask, $level);
+			for ($i=0; $i<8; ++$i) {
+				if ($format & 1) {
+					$blacks += 2;
+					$v = 0x85;
+				} else {
+					$v = 0x84;
+				}
+				$frame[8][$width - 1 - $i] = chr($v);
+				if ($i < 6) {
+					$frame[$i][8] = chr($v);
+				} else {
+					$frame[$i + 1][8] = chr($v);
+				}
+				$format = $format >> 1;
+			}
+			for ($i=0; $i<7; ++$i) {
+			if ($format & 1) {
+				$blacks += 2;
+				$v = 0x85;
+			} else {
+				$v = 0x84;
+			}
+			$frame[$width - 7 + $i][8] = chr($v);
+			if ($i == 0) {
+				$frame[8][7] = chr($v);
+			} else {
+				$frame[8][6 - $i] = chr($v);
+			}
+			$format = $format >> 1;
+			}
+			return $blacks;
+		}
+
+		/**
+		 * mask0
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask0($x, $y) {
+			return ($x + $y) & 1;
+		}
+
+		/**
+		 * mask1
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask1($x, $y) {
+			return ($y & 1);
+		}
+
+		/**
+		 * mask2
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask2($x, $y) {
+			return ($x % 3);
+		}
+
+		/**
+		 * mask3
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask3($x, $y) {
+			return ($x + $y) % 3;
+		}
+
+		/**
+		 * mask4
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask4($x, $y) {
+			return (((int)($y / 2)) + ((int)($x / 3))) & 1;
+		}
+
+		/**
+		 * mask5
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask5($x, $y) {
+			return (($x * $y) & 1) + ($x * $y) % 3;
+		}
+
+		/**
+		 * mask6
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask6($x, $y) {
+			return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
+		}
+
+		/**
+		 * mask7
+		 * @param int $x X position
+		 * @param int $y Y position
+		 * @return int mask
+		 */
+		 protected function mask7($x, $y) {
+			return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
+		}
+
+		/**
+		 * Return bitmask
+		 * @param int $maskNo mask number
+		 * @param int $width width
+		 * @param array $frame frame
+		 * @return array bitmask
+		 */
+		protected function generateMaskNo($maskNo, $width, $frame) {
+			$bitMask = array_fill(0, $width, array_fill(0, $width, 0));
+			for ($y=0; $y<$width; ++$y) {
+				for ($x=0; $x<$width; ++$x) {
+					if (ord($frame[$y][$x]) & 0x80) {
+						$bitMask[$y][$x] = 0;
+					} else {
+						$maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
+						$bitMask[$y][$x] = ($maskFunc == 0)?1:0;
+					}
+				}
+			}
+			return $bitMask;
+		}
+
+		/**
+		 * makeMaskNo
+		 * @param int $maskNo
+		 * @param int $width
+		 * @param int $s
+		 * @param int $d
+		 * @param boolean $maskGenOnly
+		 * @return int b
+		 */
+		 protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
+			$b = 0;
+			$bitMask = array();
+			$bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);
+			if ($maskGenOnly) {
+				return;
+			}
+			$d = $s;
+			for ($y=0; $y<$width; ++$y) {
+				for ($x=0; $x<$width; ++$x) {
+					if ($bitMask[$y][$x] == 1) {
+						$d[$y][$x] = chr(ord($s[$y][$x]) ^ (int)$bitMask[$y][$x]);
+					}
+					$b += (int)(ord($d[$y][$x]) & 1);
+				}
+			}
+			return $b;
+		}
+
+		/**
+		 * makeMask
+		 * @param int $width
+		 * @param array $frame
+		 * @param int $maskNo
+		 * @param int $level
+		 * @return array mask
+		 */
+		 protected function makeMask($width, $frame, $maskNo, $level) {
+			$masked = array_fill(0, $width, str_repeat("\0", $width));
+			$this->makeMaskNo($maskNo, $width, $frame, $masked);
+			$this->writeFormatInformation($width, $masked, $maskNo, $level);
+			return $masked;
+		}
+
+		/**
+		 * calcN1N3
+		 * @param int $length
+		 * @return int demerit
+		 */
+		 protected function calcN1N3($length) {
+			$demerit = 0;
+			for ($i=0; $i<$length; ++$i) {
+				if ($this->runLength[$i] >= 5) {
+					$demerit += (N1 + ($this->runLength[$i] - 5));
+				}
+				if ($i & 1) {
+					if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
+						$fact = (int)($this->runLength[$i] / 3);
+						if (($this->runLength[$i-2] == $fact)
+							AND ($this->runLength[$i-1] == $fact)
+							AND ($this->runLength[$i+1] == $fact)
+							AND ($this->runLength[$i+2] == $fact)) {
+							if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
+								$demerit += N3;
+							} elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
+								$demerit += N3;
+							}
+						}
+					}
+				}
+			}
+			return $demerit;
+		}
+
+		/**
+		 * evaluateSymbol
+		 * @param int $width
+		 * @param array $frame
+		 * @return int demerit
+		 */
+		 protected function evaluateSymbol($width, $frame) {
+			$head = 0;
+			$demerit = 0;
+			for ($y=0; $y<$width; ++$y) {
+				$head = 0;
+				$this->runLength[0] = 1;
+				$frameY = $frame[$y];
+				if ($y > 0) {
+					$frameYM = $frame[$y-1];
+				}
+				for ($x=0; $x<$width; ++$x) {
+					if (($x > 0) AND ($y > 0)) {
+						$b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]);
+						$w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]);
+						if (($b22 | ($w22 ^ 1)) & 1) {
+							$demerit += N2;
+						}
+					}
+					if (($x == 0) AND (ord($frameY[$x]) & 1)) {
+						$this->runLength[0] = -1;
+						$head = 1;
+						$this->runLength[$head] = 1;
+					} elseif ($x > 0) {
+						if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) {
+							$head++;
+							$this->runLength[$head] = 1;
+						} else {
+							$this->runLength[$head]++;
+						}
+					}
+				}
+				$demerit += $this->calcN1N3($head+1);
+			}
+			for ($x=0; $x<$width; ++$x) {
+				$head = 0;
+				$this->runLength[0] = 1;
+				for ($y=0; $y<$width; ++$y) {
+					if (($y == 0) AND (ord($frame[$y][$x]) & 1)) {
+						$this->runLength[0] = -1;
+						$head = 1;
+						$this->runLength[$head] = 1;
+					} elseif ($y > 0) {
+						if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
+							$head++;
+							$this->runLength[$head] = 1;
+						} else {
+							$this->runLength[$head]++;
+						}
+					}
+				}
+				$demerit += $this->calcN1N3($head+1);
+			}
+			return $demerit;
+		}
+
+		/**
+		 * mask
+		 * @param int $width
+		 * @param array $frame
+		 * @param int $level
+		 * @return array best mask
+		 */
+		 protected function mask($width, $frame, $level) {
+			$minDemerit = PHP_INT_MAX;
+			$bestMaskNum = 0;
+			$bestMask = array();
+			$checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
+			if (QR_FIND_FROM_RANDOM !== false) {
+				$howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
+				for ($i = 0; $i <  $howManuOut; ++$i) {
+					$remPos = rand (0, count($checked_masks)-1);
+					unset($checked_masks[$remPos]);
+					$checked_masks = array_values($checked_masks);
+				}
+			}
+			$bestMask = $frame;
+			foreach ($checked_masks as $i) {
+				$mask = array_fill(0, $width, str_repeat("\0", $width));
+				$demerit = 0;
+				$blacks = 0;
+				$blacks  = $this->makeMaskNo($i, $width, $frame, $mask);
+				$blacks += $this->writeFormatInformation($width, $mask, $i, $level);
+				$blacks  = (int)(100 * $blacks / ($width * $width));
+				$demerit = (int)((int)(abs($blacks - 50) / 5) * N4);
+				$demerit += $this->evaluateSymbol($width, $mask);
+				if ($demerit < $minDemerit) {
+					$minDemerit = $demerit;
+					$bestMask = $mask;
+					$bestMaskNum = $i;
+				}
+			}
+			return $bestMask;
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// QRsplit
+
+		/**
+		 * Return true if the character at specified position is a number
+		 * @param string $str string
+		 * @param int $pos characted position
+		 * @return boolean true of false
+		 */
+		 protected function isdigitat($str, $pos) {
+			if ($pos >= strlen($str)) {
+				return false;
+			}
+			return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
+		}
+
+		/**
+		 * Return true if the character at specified position is an alphanumeric character
+		 * @param string $str string
+		 * @param int $pos characted position
+		 * @return boolean true of false
+		 */
+		 protected function isalnumat($str, $pos) {
+			if ($pos >= strlen($str)) {
+				return false;
+			}
+			return ($this->lookAnTable(ord($str[$pos])) >= 0);
+		}
+
+		/**
+		 * identifyMode
+		 * @param int $pos
+		 * @return int mode
+		 */
+		 protected function identifyMode($pos) {
+			if ($pos >= strlen($this->dataStr)) {
+				return QR_MODE_NL;
+			}
+			$c = $this->dataStr[$pos];
+			if ($this->isdigitat($this->dataStr, $pos)) {
+				return QR_MODE_NM;
+			} elseif ($this->isalnumat($this->dataStr, $pos)) {
+				return QR_MODE_AN;
+			} elseif ($this->hint == QR_MODE_KJ) {
+				if ($pos+1 < strlen($this->dataStr)) {
+					$d = $this->dataStr[$pos+1];
+					$word = (ord($c) << 8) | ord($d);
+					if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) {
+						return QR_MODE_KJ;
+					}
+				}
+			}
+			return QR_MODE_8B;
+		}
+
+		/**
+		 * eatNum
+		 * @return int run
+		 */
+		 protected function eatNum() {
+			$ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
+			$p = 0;
+			while($this->isdigitat($this->dataStr, $p)) {
+				$p++;
+			}
+			$run = $p;
+			$mode = $this->identifyMode($p);
+			if ($mode == QR_MODE_8B) {
+				$dif = $this->estimateBitsModeNum($run) + 4 + $ln
+				+ $this->estimateBitsMode8(1)         // + 4 + l8
+				- $this->estimateBitsMode8($run + 1); // - 4 - l8
+				if ($dif > 0) {
+					return $this->eat8();
+				}
+			}
+			if ($mode == QR_MODE_AN) {
+				$dif = $this->estimateBitsModeNum($run) + 4 + $ln
+				+ $this->estimateBitsModeAn(1)        // + 4 + la
+				- $this->estimateBitsModeAn($run + 1);// - 4 - la
+				if ($dif > 0) {
+					return $this->eatAn();
+				}
+			}
+			$this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));
+			return $run;
+		}
+
+		/**
+		 * eatAn
+		 * @return int run
+		 */
+		 protected function eatAn() {
+			$la = $this->lengthIndicator(QR_MODE_AN,  $this->version);
+			$ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
+			$p = 0;
+			while($this->isalnumat($this->dataStr, $p)) {
+				if ($this->isdigitat($this->dataStr, $p)) {
+					$q = $p;
+					while($this->isdigitat($this->dataStr, $q)) {
+						$q++;
+					}
+					$dif = $this->estimateBitsModeAn($p) // + 4 + la
+					+ $this->estimateBitsModeNum($q - $p) + 4 + $ln
+					- $this->estimateBitsModeAn($q); // - 4 - la
+					if ($dif < 0) {
+						break;
+					} else {
+						$p = $q;
+					}
+				} else {
+					$p++;
+				}
+			}
+			$run = $p;
+			if (!$this->isalnumat($this->dataStr, $p)) {
+				$dif = $this->estimateBitsModeAn($run) + 4 + $la
+				+ $this->estimateBitsMode8(1) // + 4 + l8
+				- $this->estimateBitsMode8($run + 1); // - 4 - l8
+				if ($dif > 0) {
+					return $this->eat8();
+				}
+			}
+			$this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));
+			return $run;
+		}
+
+		/**
+		 * eatKanji
+		 * @return int run
+		 */
+		 protected function eatKanji() {
+			$p = 0;
+			while($this->identifyMode($p) == QR_MODE_KJ) {
+				$p += 2;
+			}
+			$this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));
+			return $run;
+		}
+
+		/**
+		 * eat8
+		 * @return int run
+		 */
+		 protected function eat8() {
+			$la = $this->lengthIndicator(QR_MODE_AN, $this->version);
+			$ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
+			$p = 1;
+			$dataStrLen = strlen($this->dataStr);
+			while($p < $dataStrLen) {
+				$mode = $this->identifyMode($p);
+				if ($mode == QR_MODE_KJ) {
+					break;
+				}
+				if ($mode == QR_MODE_NM) {
+					$q = $p;
+					while($this->isdigitat($this->dataStr, $q)) {
+						$q++;
+					}
+					$dif = $this->estimateBitsMode8($p) // + 4 + l8
+					+ $this->estimateBitsModeNum($q - $p) + 4 + $ln
+					- $this->estimateBitsMode8($q); // - 4 - l8
+					if ($dif < 0) {
+						break;
+					} else {
+						$p = $q;
+					}
+				} elseif ($mode == QR_MODE_AN) {
+					$q = $p;
+					while($this->isalnumat($this->dataStr, $q)) {
+						$q++;
+					}
+					$dif = $this->estimateBitsMode8($p)  // + 4 + l8
+					+ $this->estimateBitsModeAn($q - $p) + 4 + $la
+					- $this->estimateBitsMode8($q); // - 4 - l8
+					if ($dif < 0) {
+						break;
+					} else {
+						$p = $q;
+					}
+				} else {
+					$p++;
+				}
+			}
+			$run = $p;
+			$this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
+			return $run;
+		}
+
+		/**
+		 * splitString
+		 */
+		 protected function splitString() {
+			while (strlen($this->dataStr) > 0) {
+				if ($this->dataStr == '') {
+					return 0;
+				}
+				$mode = $this->identifyMode(0);
+				switch ($mode) {
+					case QR_MODE_NM: {
+						$length = $this->eatNum();
+						break;
+					}
+					case QR_MODE_AN: {
+						$length = $this->eatAn();
+						break;
+					}
+					case QR_MODE_KJ: {
+						if ($hint == QR_MODE_KJ) {
+							$length = $this->eatKanji();
+						} else {
+							$length = $this->eat8();
+						}
+						break;
+					}
+					default: {
+						$length = $this->eat8();
+						break;
+					}
+				}
+				if ($length == 0) {
+					return 0;
+				}
+				if ($length < 0) {
+					return -1;
+				}
+				$this->dataStr = substr($this->dataStr, $length);
+			}
+		}
+
+		/**
+		 * toUpper
+		 */
+		 protected function toUpper() {
+			$stringLen = strlen($this->dataStr);
+			$p = 0;
+			while ($p < $stringLen) {
+				$mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
+				if ($mode == QR_MODE_KJ) {
+					$p += 2;
+				} else {
+					if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
+						$this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
+					}
+					$p++;
+				}
+			}
+			return $this->dataStr;
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// QRinputItem
+
+		/**
+		 * newInputItem
+		 * @param int $mode
+		 * @param int $size
+		 * @param array $data
+		 * @param array $bstream
+		 * @return array input item
+		 */
+		 protected function newInputItem($mode, $size, $data, $bstream=null) {
+			$setData = array_slice($data, 0, $size);
+			if (count($setData) < $size) {
+				$setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
+			}
+			if (!$this->check($mode, $size, $setData)) {
+				return NULL;
+			}
+			$inputitem = array();
+			$inputitem['mode'] = $mode;
+			$inputitem['size'] = $size;
+			$inputitem['data'] = $setData;
+			$inputitem['bstream'] = $bstream;
+			return $inputitem;
+		}
+
+		/**
+		 * encodeModeNum
+		 * @param array $inputitem
+		 * @param int $version
+		 * @return array input item
+		 */
+		 protected function encodeModeNum($inputitem, $version) {
+			$words = (int)($inputitem['size'] / 3);
+			$inputitem['bstream'] = array();
+			$val = 0x1;
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
+			for ($i=0; $i < $words; ++$i) {
+				$val  = (ord($inputitem['data'][$i*3  ]) - ord('0')) * 100;
+				$val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
+				$val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
+			}
+			if ($inputitem['size'] - $words * 3 == 1) {
+				$val = ord($inputitem['data'][$words*3]) - ord('0');
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
+			} elseif (($inputitem['size'] - ($words * 3)) == 2) {
+				$val  = (ord($inputitem['data'][$words*3  ]) - ord('0')) * 10;
+				$val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
+			}
+			return $inputitem;
+		}
+
+		/**
+		 * encodeModeAn
+		 * @param array $inputitem
+		 * @param int $version
+		 * @return array input item
+		 */
+		 protected function encodeModeAn($inputitem, $version) {
+			$words = (int)($inputitem['size'] / 2);
+			$inputitem['bstream'] = array();
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
+			$inputitem['bstream'] = $this->appendNum(v, $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);
+			for ($i=0; $i < $words; ++$i) {
+				$val  = (int)$this->lookAnTable(ord($inputitem['data'][$i*2  ])) * 45;
+				$val += (int)$this->lookAnTable(ord($inputitem['data'][$i*2+1]));
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
+			}
+			if ($inputitem['size'] & 1) {
+				$val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
+			}
+			return $inputitem;
+		}
+
+		/**
+		 * encodeMode8
+		 * @param array $inputitem
+		 * @param int $version
+		 * @return array input item
+		 */
+		 protected function encodeMode8($inputitem, $version) {
+			$inputitem['bstream'] = array();
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
+			for ($i=0; $i < $inputitem['size']; ++$i) {
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
+			}
+			return $inputitem;
+		}
+
+		/**
+		 * encodeModeKanji
+		 * @param array $inputitem
+		 * @param int $version
+		 * @return array input item
+		 */
+		 protected function encodeModeKanji($inputitem, $version) {
+			$inputitem['bstream'] = array();
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
+			for ($i=0; $i<$inputitem['size']; $i+=2) {
+				$val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
+				if ($val <= 0x9ffc) {
+					$val -= 0x8140;
+				} else {
+					$val -= 0xc140;
+				}
+				$h = ($val >> 8) * 0xc0;
+				$val = ($val & 0xff) + $h;
+				$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
+			}
+			return $inputitem;
+		}
+
+		/**
+		 * encodeModeStructure
+		 * @param array $inputitem
+		 * @return array input item
+		 */
+		 protected function encodeModeStructure($inputitem) {
+			$inputitem['bstream'] = array();
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
+			$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
+			return $inputitem;
+		}
+
+		/**
+		 * encodeBitStream
+		 * @param array $inputitem
+		 * @param int $version
+		 * @return array input item
+		 */
+		 protected function encodeBitStream($inputitem, $version) {
+			$inputitem['bstream'] = array();
+			$words = $this->maximumWords($inputitem['mode'], $version);
+			if ($inputitem['size'] > $words) {
+				$st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
+				$st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
+				$st1 = $this->encodeBitStream($st1, $version);
+				$st2 = $this->encodeBitStream($st2, $version);
+				$inputitem['bstream'] = array();
+				$inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
+				$inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
+			} else {
+				switch($inputitem['mode']) {
+					case QR_MODE_NM: {
+						$inputitem = $this->encodeModeNum($inputitem, $version);
+						break;
+					}
+					case QR_MODE_AN: {
+						$inputitem = $this->encodeModeAn($inputitem, $version);
+						break;
+					}
+					case QR_MODE_8B: {
+						$inputitem = $this->encodeMode8($inputitem, $version);
+						break;
+					}
+					case QR_MODE_KJ: {
+						$inputitem = $this->encodeModeKanji($inputitem, $version);
+						break;
+					}
+					case QR_MODE_ST: {
+						$inputitem = $this->encodeModeStructure($inputitem);
+						break;
+					}
+					default: {
+						break;
+					}
+				}
+			}
+			return $inputitem;
+		}
+
+		// - - - - - - - - - - - - - - - - - - - - - - - - -
+
+		// QRinput
+
+		/**
+		 * Append data to an input object.
+		 * The data is copied and appended to the input object.
+		 * @param array items input items
+		 * @param int $mode encoding mode.
+		 * @param int $size size of data (byte).
+		 * @param array $data array of input data.
+		 * @return items
+		 *
+		 */
+		protected function appendNewInputItem($items, $mode, $size, $data) {
+			$items[] = $this->newInputItem($mode, $size, $data);
+			return $items;
+		}
+
+		/**
+		 * insertStructuredAppendHeader
+		 * @param array $items
+		 * @param int $size
+		 * @param int $index
+		 * @param int $parity
+		 * @return array items
+		 */
+		 protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
+			if ($size > MAX_STRUCTURED_SYMBOLS) {
+				return -1;
+			}
+			if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
+				return -1;
+			}
+			$buf = array($size, $index, $parity);
+			$entry = $this->newInputItem(QR_MODE_ST, 3, buf);
+			array_unshift($items, $entry);
+			return $items;
+		}
+
+		/**
+		 * calcParity
+		 * @param array $items
+		 * @return int parity
+		 */
+		 protected function calcParity($items) {
+			$parity = 0;
+			foreach ($items as $item) {
+				if ($item['mode'] != QR_MODE_ST) {
+					for ($i=$item['size']-1; $i>=0; --$i) {
+						$parity ^= $item['data'][$i];
+					}
+				}
+			}
+			return $parity;
+		}
+
+		/**
+		 * checkModeNum
+		 * @param int $size
+		 * @param array $data
+		 * @return boolean true or false
+		 */
+		 protected function checkModeNum($size, $data) {
+			for ($i=0; $i<$size; ++$i) {
+				if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
+					return false;
+				}
+			}
+			return true;
+		}
+
+		/**
+		 * estimateBitsModeNum
+		 * @param int $size
+		 * @return int number of bits
+		 */
+		 protected function estimateBitsModeNum($size) {
+			$w = (int)$size / 3;
+			$bits = $w * 10;
+			switch($size - $w * 3) {
+				case 1: {
+					$bits += 4;
+					break;
+				}
+				case 2: {
+					$bits += 7;
+					break;
+				}
+				default: {
+					break;
+				}
+			}
+			return $bits;
+		}
+
+		/**
+		 * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
+		 * @param int $c character value
+		 * @return value
+		 */
+		protected function lookAnTable($c) {
+			return (($c > 127)?-1:$this->anTable[$c]);
+		}
+
+		/**
+		 * checkModeAn
+		 * @param int $size
+		 * @param array $data
+		 * @return boolean true or false
+		 */
+		 protected function checkModeAn($size, $data) {
+			for ($i=0; $i<$size; ++$i) {
+				if ($this->lookAnTable(ord($data[$i])) == -1) {
+					return false;
+				}
+			}
+			return true;
+		}
+
+		/**
+		 * estimateBitsModeAn
+		 * @param int $size
+		 * @return int number of bits
+		 */
+		 protected function estimateBitsModeAn($size) {
+			$w = (int)($size / 2);
+			$bits = $w * 11;
+			if ($size & 1) {
+				$bits += 6;
+			}
+			return $bits;
+		}
+
+		/**
+		 * estimateBitsMode8
+		 * @param int $size
+		 * @return int number of bits
+		 */
+		 protected function estimateBitsMode8($size) {
+			return $size * 8;
+		}
+
+		/**
+		 * estimateBitsModeKanji