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/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Mime
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Mime.php 24594 2012-01-05 21:27:01Z matthew $
 */


/**
 * Support class for MultiPart Mime Messages
 *
 * @category   Zend
 * @package    Zend_Mime
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Mime
{
    const TYPE_OCTETSTREAM = &#039;application/octet-stream&#039;;
    const TYPE_TEXT = &#039;text/plain&#039;;
    const TYPE_HTML = &#039;text/html&#039;;
    const ENCODING_7BIT = &#039;7bit&#039;;
    const ENCODING_8BIT = &#039;8bit&#039;;
    const ENCODING_QUOTEDPRINTABLE = &#039;quoted-printable&#039;;
    const ENCODING_BASE64 = &#039;base64&#039;;
    const DISPOSITION_ATTACHMENT = &#039;attachment&#039;;
    const DISPOSITION_INLINE = &#039;inline&#039;;
    const LINELENGTH = 72;
    const LINEEND = &quot;\n&quot;;
    const MULTIPART_ALTERNATIVE = &#039;multipart/alternative&#039;;
    const MULTIPART_MIXED = &#039;multipart/mixed&#039;;
    const MULTIPART_RELATED = &#039;multipart/related&#039;;

    protected $_boundary;
    protected static $makeUnique = 0;

    // lookup-Tables for QuotedPrintable
    public static $qpKeys = array(
        &quot;\x00&quot;,&quot;\x01&quot;,&quot;\x02&quot;,&quot;\x03&quot;,&quot;\x04&quot;,&quot;\x05&quot;,&quot;\x06&quot;,&quot;\x07&quot;,
        &quot;\x08&quot;,&quot;\x09&quot;,&quot;\x0A&quot;,&quot;\x0B&quot;,&quot;\x0C&quot;,&quot;\x0D&quot;,&quot;\x0E&quot;,&quot;\x0F&quot;,
        &quot;\x10&quot;,&quot;\x11&quot;,&quot;\x12&quot;,&quot;\x13&quot;,&quot;\x14&quot;,&quot;\x15&quot;,&quot;\x16&quot;,&quot;\x17&quot;,
        &quot;\x18&quot;,&quot;\x19&quot;,&quot;\x1A&quot;,&quot;\x1B&quot;,&quot;\x1C&quot;,&quot;\x1D&quot;,&quot;\x1E&quot;,&quot;\x1F&quot;,
        &quot;\x7F&quot;,&quot;\x80&quot;,&quot;\x81&quot;,&quot;\x82&quot;,&quot;\x83&quot;,&quot;\x84&quot;,&quot;\x85&quot;,&quot;\x86&quot;,
        &quot;\x87&quot;,&quot;\x88&quot;,&quot;\x89&quot;,&quot;\x8A&quot;,&quot;\x8B&quot;,&quot;\x8C&quot;,&quot;\x8D&quot;,&quot;\x8E&quot;,
        &quot;\x8F&quot;,&quot;\x90&quot;,&quot;\x91&quot;,&quot;\x92&quot;,&quot;\x93&quot;,&quot;\x94&quot;,&quot;\x95&quot;,&quot;\x96&quot;,
        &quot;\x97&quot;,&quot;\x98&quot;,&quot;\x99&quot;,&quot;\x9A&quot;,&quot;\x9B&quot;,&quot;\x9C&quot;,&quot;\x9D&quot;,&quot;\x9E&quot;,
        &quot;\x9F&quot;,&quot;\xA0&quot;,&quot;\xA1&quot;,&quot;\xA2&quot;,&quot;\xA3&quot;,&quot;\xA4&quot;,&quot;\xA5&quot;,&quot;\xA6&quot;,
        &quot;\xA7&quot;,&quot;\xA8&quot;,&quot;\xA9&quot;,&quot;\xAA&quot;,&quot;\xAB&quot;,&quot;\xAC&quot;,&quot;\xAD&quot;,&quot;\xAE&quot;,
        &quot;\xAF&quot;,&quot;\xB0&quot;,&quot;\xB1&quot;,&quot;\xB2&quot;,&quot;\xB3&quot;,&quot;\xB4&quot;,&quot;\xB5&quot;,&quot;\xB6&quot;,
        &quot;\xB7&quot;,&quot;\xB8&quot;,&quot;\xB9&quot;,&quot;\xBA&quot;,&quot;\xBB&quot;,&quot;\xBC&quot;,&quot;\xBD&quot;,&quot;\xBE&quot;,
        &quot;\xBF&quot;,&quot;\xC0&quot;,&quot;\xC1&quot;,&quot;\xC2&quot;,&quot;\xC3&quot;,&quot;\xC4&quot;,&quot;\xC5&quot;,&quot;\xC6&quot;,
        &quot;\xC7&quot;,&quot;\xC8&quot;,&quot;\xC9&quot;,&quot;\xCA&quot;,&quot;\xCB&quot;,&quot;\xCC&quot;,&quot;\xCD&quot;,&quot;\xCE&quot;,
        &quot;\xCF&quot;,&quot;\xD0&quot;,&quot;\xD1&quot;,&quot;\xD2&quot;,&quot;\xD3&quot;,&quot;\xD4&quot;,&quot;\xD5&quot;,&quot;\xD6&quot;,
        &quot;\xD7&quot;,&quot;\xD8&quot;,&quot;\xD9&quot;,&quot;\xDA&quot;,&quot;\xDB&quot;,&quot;\xDC&quot;,&quot;\xDD&quot;,&quot;\xDE&quot;,
        &quot;\xDF&quot;,&quot;\xE0&quot;,&quot;\xE1&quot;,&quot;\xE2&quot;,&quot;\xE3&quot;,&quot;\xE4&quot;,&quot;\xE5&quot;,&quot;\xE6&quot;,
        &quot;\xE7&quot;,&quot;\xE8&quot;,&quot;\xE9&quot;,&quot;\xEA&quot;,&quot;\xEB&quot;,&quot;\xEC&quot;,&quot;\xED&quot;,&quot;\xEE&quot;,
        &quot;\xEF&quot;,&quot;\xF0&quot;,&quot;\xF1&quot;,&quot;\xF2&quot;,&quot;\xF3&quot;,&quot;\xF4&quot;,&quot;\xF5&quot;,&quot;\xF6&quot;,
        &quot;\xF7&quot;,&quot;\xF8&quot;,&quot;\xF9&quot;,&quot;\xFA&quot;,&quot;\xFB&quot;,&quot;\xFC&quot;,&quot;\xFD&quot;,&quot;\xFE&quot;,
        &quot;\xFF&quot;
        );

    public static $qpReplaceValues = array(
        &quot;=00&quot;,&quot;=01&quot;,&quot;=02&quot;,&quot;=03&quot;,&quot;=04&quot;,&quot;=05&quot;,&quot;=06&quot;,&quot;=07&quot;,
        &quot;=08&quot;,&quot;=09&quot;,&quot;=0A&quot;,&quot;=0B&quot;,&quot;=0C&quot;,&quot;=0D&quot;,&quot;=0E&quot;,&quot;=0F&quot;,
        &quot;=10&quot;,&quot;=11&quot;,&quot;=12&quot;,&quot;=13&quot;,&quot;=14&quot;,&quot;=15&quot;,&quot;=16&quot;,&quot;=17&quot;,
        &quot;=18&quot;,&quot;=19&quot;,&quot;=1A&quot;,&quot;=1B&quot;,&quot;=1C&quot;,&quot;=1D&quot;,&quot;=1E&quot;,&quot;=1F&quot;,
        &quot;=7F&quot;,&quot;=80&quot;,&quot;=81&quot;,&quot;=82&quot;,&quot;=83&quot;,&quot;=84&quot;,&quot;=85&quot;,&quot;=86&quot;,
        &quot;=87&quot;,&quot;=88&quot;,&quot;=89&quot;,&quot;=8A&quot;,&quot;=8B&quot;,&quot;=8C&quot;,&quot;=8D&quot;,&quot;=8E&quot;,
        &quot;=8F&quot;,&quot;=90&quot;,&quot;=91&quot;,&quot;=92&quot;,&quot;=93&quot;,&quot;=94&quot;,&quot;=95&quot;,&quot;=96&quot;,
        &quot;=97&quot;,&quot;=98&quot;,&quot;=99&quot;,&quot;=9A&quot;,&quot;=9B&quot;,&quot;=9C&quot;,&quot;=9D&quot;,&quot;=9E&quot;,
        &quot;=9F&quot;,&quot;=A0&quot;,&quot;=A1&quot;,&quot;=A2&quot;,&quot;=A3&quot;,&quot;=A4&quot;,&quot;=A5&quot;,&quot;=A6&quot;,
        &quot;=A7&quot;,&quot;=A8&quot;,&quot;=A9&quot;,&quot;=AA&quot;,&quot;=AB&quot;,&quot;=AC&quot;,&quot;=AD&quot;,&quot;=AE&quot;,
        &quot;=AF&quot;,&quot;=B0&quot;,&quot;=B1&quot;,&quot;=B2&quot;,&quot;=B3&quot;,&quot;=B4&quot;,&quot;=B5&quot;,&quot;=B6&quot;,
        &quot;=B7&quot;,&quot;=B8&quot;,&quot;=B9&quot;,&quot;=BA&quot;,&quot;=BB&quot;,&quot;=BC&quot;,&quot;=BD&quot;,&quot;=BE&quot;,
        &quot;=BF&quot;,&quot;=C0&quot;,&quot;=C1&quot;,&quot;=C2&quot;,&quot;=C3&quot;,&quot;=C4&quot;,&quot;=C5&quot;,&quot;=C6&quot;,
        &quot;=C7&quot;,&quot;=C8&quot;,&quot;=C9&quot;,&quot;=CA&quot;,&quot;=CB&quot;,&quot;=CC&quot;,&quot;=CD&quot;,&quot;=CE&quot;,
        &quot;=CF&quot;,&quot;=D0&quot;,&quot;=D1&quot;,&quot;=D2&quot;,&quot;=D3&quot;,&quot;=D4&quot;,&quot;=D5&quot;,&quot;=D6&quot;,
        &quot;=D7&quot;,&quot;=D8&quot;,&quot;=D9&quot;,&quot;=DA&quot;,&quot;=DB&quot;,&quot;=DC&quot;,&quot;=DD&quot;,&quot;=DE&quot;,
        &quot;=DF&quot;,&quot;=E0&quot;,&quot;=E1&quot;,&quot;=E2&quot;,&quot;=E3&quot;,&quot;=E4&quot;,&quot;=E5&quot;,&quot;=E6&quot;,
        &quot;=E7&quot;,&quot;=E8&quot;,&quot;=E9&quot;,&quot;=EA&quot;,&quot;=EB&quot;,&quot;=EC&quot;,&quot;=ED&quot;,&quot;=EE&quot;,
        &quot;=EF&quot;,&quot;=F0&quot;,&quot;=F1&quot;,&quot;=F2&quot;,&quot;=F3&quot;,&quot;=F4&quot;,&quot;=F5&quot;,&quot;=F6&quot;,
        &quot;=F7&quot;,&quot;=F8&quot;,&quot;=F9&quot;,&quot;=FA&quot;,&quot;=FB&quot;,&quot;=FC&quot;,&quot;=FD&quot;,&quot;=FE&quot;,
        &quot;=FF&quot;
        );

    public static $qpKeysString =
         &quot;\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x7F\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F\xA0\xA1\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xAB\xAC\xAD\xAE\xAF\xB0\xB1\xB2\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xBB\xBC\xBD\xBE\xBF\xC0\xC1\xC2\xC3\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xCB\xCC\xCD\xCE\xCF\xD0\xD1\xD2\xD3\xD4\xD5\xD6\xD7\xD8\xD9\xDA\xDB\xDC\xDD\xDE\xDF\xE0\xE1\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9\xEA\xEB\xEC\xED\xEE\xEF\xF0\xF1\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA\xFB\xFC\xFD\xFE\xFF&quot;;

    /**
     * Check if the given string is &quot;printable&quot;
     *
     * Checks that a string contains no unprintable characters. If this returns
     * false, encode the string for secure delivery.
     *
     * @param string $str
     * @return boolean
     */
    public static function isPrintable($str)
    {
        return (strcspn($str, self::$qpKeysString) == strlen($str));
    }

    /**
     * Encode a given string with the QUOTED_PRINTABLE mechanism and wrap the lines.
     *
     * @param string $str
     * @param int $lineLength Defaults to {@link LINELENGTH}
     * @param int $lineEnd Defaults to {@link LINEEND}
     * @return string
     */
    public static function encodeQuotedPrintable($str,
        $lineLength = self::LINELENGTH,
        $lineEnd = self::LINEEND)
    {
        $out = &#039;&#039;;
        $str = self::_encodeQuotedPrintable($str);

        // Split encoded text into separate lines
        while ($str) {
            $ptr = strlen($str);
            if ($ptr &gt; $lineLength) {
                $ptr = $lineLength;
            }

            // Ensure we are not splitting across an encoded character
            $pos = strrpos(substr($str, 0, $ptr), &#039;=&#039;);
            if ($pos !== false &amp;&amp; $pos &gt;= $ptr - 2) {
                $ptr = $pos;
            }

            // Check if there is a space at the end of the line and rewind
            if ($ptr &gt; 0 &amp;&amp; $str[$ptr - 1] == &#039; &#039;) {
                --$ptr;
            }

            // Add string and continue
            $out .= substr($str, 0, $ptr) . &#039;=&#039; . $lineEnd;
            $str = substr($str, $ptr);
        }

        $out = rtrim($out, $lineEnd);
        $out = rtrim($out, &#039;=&#039;);
        return $out;
    }

    /**
     * Converts a string into quoted printable format.
     *
     * @param  string $str
     * @return string
     */
    private static function _encodeQuotedPrintable($str)
    {
        $str = str_replace(&#039;=&#039;, &#039;=3D&#039;, $str);
        $str = str_replace(self::$qpKeys, self::$qpReplaceValues, $str);
        $str = rtrim($str);
        return $str;
    }

    /**
     * Encode a given string with the QUOTED_PRINTABLE mechanism for Mail Headers.
     *
     * Mail headers depend on an extended quoted printable algorithm otherwise
     * a range of bugs can occur.
     *
     * @param string $str
     * @param string $charset
     * @param int $lineLength Defaults to {@link LINELENGTH}
     * @param int $lineEnd Defaults to {@link LINEEND}
     * @return string
     */
    public static function encodeQuotedPrintableHeader($str, $charset,
        $lineLength = self::LINELENGTH,
        $lineEnd = self::LINEEND)
    {
        // Reduce line-length by the length of the required delimiter, charsets and encoding
        $prefix = sprintf(&#039;=?%s?Q?&#039;, $charset);
        $lineLength = $lineLength-strlen($prefix)-3;

        $str = self::_encodeQuotedPrintable($str);

        // Mail-Header required chars have to be encoded also:
        $str = str_replace(array(&#039;?&#039;, &#039; &#039;, &#039;_&#039;), array(&#039;=3F&#039;, &#039;=20&#039;, &#039;=5F&#039;), $str);

        // initialize first line, we need it anyways
        $lines = array(0 =&gt; &quot;&quot;);

        // Split encoded text into separate lines
        $tmp = &quot;&quot;;
        while(strlen($str) &gt; 0) {
            $currentLine = max(count($lines)-1, 0);
            $token       = self::getNextQuotedPrintableToken($str);
            $str         = substr($str, strlen($token));

            $tmp .= $token;
            if($token == &#039;=20&#039;) {
                // only if we have a single char token or space, we can append the
                // tempstring it to the current line or start a new line if necessary.
                if(strlen($lines[$currentLine].$tmp) &gt; $lineLength) {
                    $lines[$currentLine+1] = $tmp;
                } else {
                    $lines[$currentLine] .= $tmp;
                }
                $tmp = &quot;&quot;;
            }
            // don&#039;t forget to append the rest to the last line
            if(strlen($str) == 0) {
                $lines[$currentLine] .= $tmp;
            }
        }

        // assemble the lines together by pre- and appending delimiters, charset, encoding.
        for($i = 0; $i &lt; count($lines); $i++) {
            $lines[$i] = &quot; &quot;.$prefix.$lines[$i].&quot;?=&quot;;
        }
        $str = trim(implode($lineEnd, $lines));
        return $str;
    }

    /**
     * Retrieves the first token from a quoted printable string.
     *
     * @param  string $str
     * @return string
     */
    private static function getNextQuotedPrintableToken($str)
    {
        if(substr($str, 0, 1) == &quot;=&quot;) {
            $token = substr($str, 0, 3);
        } else {
            $token = substr($str, 0, 1);
        }
        return $token;
    }

    /**
     * Encode a given string in mail header compatible base64 encoding.
     *
     * @param string $str
     * @param string $charset
     * @param int $lineLength Defaults to {@link LINELENGTH}
     * @param int $lineEnd Defaults to {@link LINEEND}
     * @return string
     */
    public static function encodeBase64Header($str,
        $charset,
        $lineLength = self::LINELENGTH,
        $lineEnd = self::LINEEND)
    {
        $prefix = &#039;=?&#039; . $charset . &#039;?B?&#039;;
        $suffix = &#039;?=&#039;;
        $remainingLength = $lineLength - strlen($prefix) - strlen($suffix);

        $encodedValue = self::encodeBase64($str, $remainingLength, $lineEnd);
        $encodedValue = str_replace($lineEnd, $suffix . $lineEnd . &#039; &#039; . $prefix, $encodedValue);
        $encodedValue = $prefix . $encodedValue . $suffix;
        return $encodedValue;
    }

    /**
     * Encode a given string in base64 encoding and break lines
     * according to the maximum linelength.
     *
     * @param string $str
     * @param int $lineLength Defaults to {@link LINELENGTH}
     * @param int $lineEnd Defaults to {@link LINEEND}
     * @return string
     */
    public static function encodeBase64($str,
        $lineLength = self::LINELENGTH,
        $lineEnd = self::LINEEND)
    {
        return rtrim(chunk_split(base64_encode($str), $lineLength, $lineEnd));
    }

    /**
     * Constructor
     *
     * @param null|string $boundary
     * @access public
     * @return void
     */
    public function __construct($boundary = null)
    {
        // This string needs to be somewhat unique
        if ($boundary === null) {
            $this-&gt;_boundary = &#039;=_&#039; . md5(microtime(1) . self::$makeUnique++);
        } else {
            $this-&gt;_boundary = $boundary;
        }
    }

    /**
     * Encode the given string with the given encoding.
     *
     * @param string $str
     * @param string $encoding
     * @param string $EOL EOL string; defaults to {@link Zend_Mime::LINEEND}
     * @return string
     */
    public static function encode($str, $encoding, $EOL = self::LINEEND)
    {
        switch ($encoding) {
            case self::ENCODING_BASE64:
                return self::encodeBase64($str, self::LINELENGTH, $EOL);

            case self::ENCODING_QUOTEDPRINTABLE:
                return self::encodeQuotedPrintable($str, self::LINELENGTH, $EOL);

            default:
                /**
                 * @todo 7Bit and 8Bit is currently handled the same way.
                 */
                return $str;
        }
    }

    /**
     * Return a MIME boundary
     *
     * @access public
     * @return string
     */
    public function boundary()
    {
        return $this-&gt;_boundary;
    }

    /**
     * Return a MIME boundary line
     *
     * @param mixed $EOL Defaults to {@link LINEEND}
     * @access public
     * @return string
     */
    public function boundaryLine($EOL = self::LINEEND)
    {
        return $EOL . &#039;--&#039; . $this-&gt;_boundary . $EOL;
    }

    /**
     * Return MIME ending
     *
     * @access public
     * @return string
     */
    public function mimeEnd($EOL = self::LINEEND)
    {
        return $EOL . &#039;--&#039; . $this-&gt;_boundary . &#039;--&#039; . $EOL;
    }
}
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