--- /dev/null
+<?php
+
+/**
+ * Pure-PHP ASN.1 Parser
+ *
+ * PHP versions 4 and 5
+ *
+ * ASN.1 provides the semantics for data encoded using various schemes. The most commonly
+ * utilized scheme is DER or the "Distinguished Encoding Rules". PEM's are base64 encoded
+ * DER blobs.
+ *
+ * File_ASN1 decodes and encodes DER formatted messages and places them in a semantic context.
+ *
+ * Uses the 1988 ASN.1 syntax.
+ *
+ * LICENSE: 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.
+ *
+ * @category File
+ * @package File_ASN1
+ * @author Jim Wigginton <terrafrost@php.net>
+ * @copyright 2012 Jim Wigginton
+ * @license http://www.opensource.org/licenses/mit-license.html MIT License
+ * @link http://phpseclib.sourceforge.net
+ */
+
+/**#@+
+ * Tag Classes
+ *
+ * @access private
+ * @link http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#page=12
+ */
+define('FILE_ASN1_CLASS_UNIVERSAL', 0);
+define('FILE_ASN1_CLASS_APPLICATION', 1);
+define('FILE_ASN1_CLASS_CONTEXT_SPECIFIC', 2);
+define('FILE_ASN1_CLASS_PRIVATE', 3);
+/**#@-*/
+
+/**#@+
+ * Tag Classes
+ *
+ * @access private
+ * @link http://www.obj-sys.com/asn1tutorial/node124.html
+ */
+define('FILE_ASN1_TYPE_BOOLEAN', 1);
+define('FILE_ASN1_TYPE_INTEGER', 2);
+define('FILE_ASN1_TYPE_BIT_STRING', 3);
+define('FILE_ASN1_TYPE_OCTET_STRING', 4);
+define('FILE_ASN1_TYPE_NULL', 5);
+define('FILE_ASN1_TYPE_OBJECT_IDENTIFIER', 6);
+//define('FILE_ASN1_TYPE_OBJECT_DESCRIPTOR', 7);
+//define('FILE_ASN1_TYPE_INSTANCE_OF', 8); // EXTERNAL
+define('FILE_ASN1_TYPE_REAL', 9);
+define('FILE_ASN1_TYPE_ENUMERATED', 10);
+//define('FILE_ASN1_TYPE_EMBEDDED', 11);
+define('FILE_ASN1_TYPE_UTF8_STRING', 12);
+//define('FILE_ASN1_TYPE_RELATIVE_OID', 13);
+define('FILE_ASN1_TYPE_SEQUENCE', 16); // SEQUENCE OF
+define('FILE_ASN1_TYPE_SET', 17); // SET OF
+/**#@-*/
+/**#@+
+ * More Tag Classes
+ *
+ * @access private
+ * @link http://www.obj-sys.com/asn1tutorial/node10.html
+ */
+define('FILE_ASN1_TYPE_NUMERIC_STRING', 18);
+define('FILE_ASN1_TYPE_PRINTABLE_STRING', 19);
+define('FILE_ASN1_TYPE_TELETEX_STRING', 20); // T61String
+define('FILE_ASN1_TYPE_VIDEOTEX_STRING', 21);
+define('FILE_ASN1_TYPE_IA5_STRING', 22);
+define('FILE_ASN1_TYPE_UTC_TIME', 23);
+define('FILE_ASN1_TYPE_GENERALIZED_TIME', 24);
+define('FILE_ASN1_TYPE_GRAPHIC_STRING', 25);
+define('FILE_ASN1_TYPE_VISIBLE_STRING', 26); // ISO646String
+define('FILE_ASN1_TYPE_GENERAL_STRING', 27);
+define('FILE_ASN1_TYPE_UNIVERSAL_STRING', 28);
+//define('FILE_ASN1_TYPE_CHARACTER_STRING', 29);
+define('FILE_ASN1_TYPE_BMP_STRING', 30);
+/**#@-*/
+
+/**#@+
+ * Tag Aliases
+ *
+ * These tags are kinda place holders for other tags.
+ *
+ * @access private
+ */
+define('FILE_ASN1_TYPE_CHOICE', -1);
+define('FILE_ASN1_TYPE_ANY', -2);
+/**#@-*/
+
+/**
+ * ASN.1 Element
+ *
+ * Bypass normal encoding rules in File_ASN1::encodeDER()
+ *
+ * @package File_ASN1
+ * @author Jim Wigginton <terrafrost@php.net>
+ * @access public
+ */
+class File_ASN1_Element
+{
+ /**
+ * Raw element value
+ *
+ * @var String
+ * @access private
+ */
+ var $element;
+
+ /**
+ * Constructor
+ *
+ * @param String $encoded
+ * @return File_ASN1_Element
+ * @access public
+ */
+ function File_ASN1_Element($encoded)
+ {
+ $this->element = $encoded;
+ }
+}
+
+/**
+ * Pure-PHP ASN.1 Parser
+ *
+ * @package File_ASN1
+ * @author Jim Wigginton <terrafrost@php.net>
+ * @access public
+ */
+class File_ASN1
+{
+ /**
+ * ASN.1 object identifier
+ *
+ * @var Array
+ * @access private
+ * @link http://en.wikipedia.org/wiki/Object_identifier
+ */
+ var $oids = array();
+
+ /**
+ * Default date format
+ *
+ * @var String
+ * @access private
+ * @link http://php.net/class.datetime
+ */
+ var $format = 'D, d M Y H:i:s O';
+
+ /**
+ * Default date format
+ *
+ * @var Array
+ * @access private
+ * @see File_ASN1::setTimeFormat()
+ * @see File_ASN1::asn1map()
+ * @link http://php.net/class.datetime
+ */
+ var $encoded;
+
+ /**
+ * Filters
+ *
+ * If the mapping type is FILE_ASN1_TYPE_ANY what do we actually encode it as?
+ *
+ * @var Array
+ * @access private
+ * @see File_ASN1::_encode_der()
+ */
+ var $filters;
+
+ /**
+ * Type mapping table for the ANY type.
+ *
+ * Structured or unknown types are mapped to a FILE_ASN1_Element.
+ * Unambiguous types get the direct mapping (int/real/bool).
+ * Others are mapped as a choice, with an extra indexing level.
+ *
+ * @var Array
+ * @access public
+ */
+ var $ANYmap = array(
+ FILE_ASN1_TYPE_BOOLEAN => true,
+ FILE_ASN1_TYPE_INTEGER => true,
+ FILE_ASN1_TYPE_BIT_STRING => 'bitString',
+ FILE_ASN1_TYPE_OCTET_STRING => 'octetString',
+ FILE_ASN1_TYPE_NULL => 'null',
+ FILE_ASN1_TYPE_OBJECT_IDENTIFIER => 'objectIdentifier',
+ FILE_ASN1_TYPE_REAL => true,
+ FILE_ASN1_TYPE_ENUMERATED => 'enumerated',
+ FILE_ASN1_TYPE_UTF8_STRING => 'utf8String',
+ FILE_ASN1_TYPE_NUMERIC_STRING => 'numericString',
+ FILE_ASN1_TYPE_PRINTABLE_STRING => 'printableString',
+ FILE_ASN1_TYPE_TELETEX_STRING => 'teletexString',
+ FILE_ASN1_TYPE_VIDEOTEX_STRING => 'videotexString',
+ FILE_ASN1_TYPE_IA5_STRING => 'ia5String',
+ FILE_ASN1_TYPE_UTC_TIME => 'utcTime',
+ FILE_ASN1_TYPE_GENERALIZED_TIME => 'generalTime',
+ FILE_ASN1_TYPE_GRAPHIC_STRING => 'graphicString',
+ FILE_ASN1_TYPE_VISIBLE_STRING => 'visibleString',
+ FILE_ASN1_TYPE_GENERAL_STRING => 'generalString',
+ FILE_ASN1_TYPE_UNIVERSAL_STRING => 'universalString',
+ //FILE_ASN1_TYPE_CHARACTER_STRING => 'characterString',
+ FILE_ASN1_TYPE_BMP_STRING => 'bmpString'
+ );
+
+ /**
+ * String type to character size mapping table.
+ *
+ * Non-convertable types are absent from this table.
+ * size == 0 indicates variable length encoding.
+ *
+ * @var Array
+ * @access public
+ */
+ var $stringTypeSize = array(
+ FILE_ASN1_TYPE_UTF8_STRING => 0,
+ FILE_ASN1_TYPE_BMP_STRING => 2,
+ FILE_ASN1_TYPE_UNIVERSAL_STRING => 4,
+ FILE_ASN1_TYPE_PRINTABLE_STRING => 1,
+ FILE_ASN1_TYPE_TELETEX_STRING => 1,
+ FILE_ASN1_TYPE_IA5_STRING => 1,
+ FILE_ASN1_TYPE_VISIBLE_STRING => 1,
+ );
+
+ /**
+ * Default Constructor.
+ *
+ * @access public
+ */
+ function File_ASN1()
+ {
+ static $static_init = null;
+ if (!$static_init) {
+ $static_init = true;
+ if (!class_exists('Math_BigInteger')) {
+ include_once 'Math/BigInteger.php';
+ }
+ }
+ }
+
+ /**
+ * Parse BER-encoding
+ *
+ * Serves a similar purpose to openssl's asn1parse
+ *
+ * @param String $encoded
+ * @return Array
+ * @access public
+ */
+ function decodeBER($encoded)
+ {
+ if (is_object($encoded) && strtolower(get_class($encoded)) == 'file_asn1_element') {
+ $encoded = $encoded->element;
+ }
+
+ $this->encoded = $encoded;
+ // encapsulate in an array for BC with the old decodeBER
+ return array($this->_decode_ber($encoded));
+ }
+
+ /**
+ * Parse BER-encoding (Helper function)
+ *
+ * Sometimes we want to get the BER encoding of a particular tag. $start lets us do that without having to reencode.
+ * $encoded is passed by reference for the recursive calls done for FILE_ASN1_TYPE_BIT_STRING and
+ * FILE_ASN1_TYPE_OCTET_STRING. In those cases, the indefinite length is used.
+ *
+ * @param String $encoded
+ * @param Integer $start
+ * @return Array
+ * @access private
+ */
+ function _decode_ber($encoded, $start = 0)
+ {
+ $current = array('start' => $start);
+
+ $type = ord($this->_string_shift($encoded));
+ $start++;
+
+ $constructed = ($type >> 5) & 1;
+
+ $tag = $type & 0x1F;
+ if ($tag == 0x1F) {
+ $tag = 0;
+ // process septets (since the eighth bit is ignored, it's not an octet)
+ do {
+ $loop = ord($encoded[0]) >> 7;
+ $tag <<= 7;
+ $tag |= ord($this->_string_shift($encoded)) & 0x7F;
+ $start++;
+ } while ( $loop );
+ }
+
+ // Length, as discussed in paragraph 8.1.3 of X.690-0207.pdf#page=13
+ $length = ord($this->_string_shift($encoded));
+ $start++;
+ if ( $length == 0x80 ) { // indefinite length
+ // "[A sender shall] use the indefinite form (see 8.1.3.6) if the encoding is constructed and is not all
+ // immediately available." -- paragraph 8.1.3.2.c
+ $length = strlen($encoded);
+ } elseif ( $length & 0x80 ) { // definite length, long form
+ // technically, the long form of the length can be represented by up to 126 octets (bytes), but we'll only
+ // support it up to four.
+ $length&= 0x7F;
+ $temp = $this->_string_shift($encoded, $length);
+ // tags of indefinte length don't really have a header length; this length includes the tag
+ $current+= array('headerlength' => $length + 2);
+ $start+= $length;
+ extract(unpack('Nlength', substr(str_pad($temp, 4, chr(0), STR_PAD_LEFT), -4)));
+ } else {
+ $current+= array('headerlength' => 2);
+ }
+
+ $content = $this->_string_shift($encoded, $length);
+
+ // at this point $length can be overwritten. it's only accurate for definite length things as is
+
+ /* Class is UNIVERSAL, APPLICATION, PRIVATE, or CONTEXT-SPECIFIC. The UNIVERSAL class is restricted to the ASN.1
+ built-in types. It defines an application-independent data type that must be distinguishable from all other
+ data types. The other three classes are user defined. The APPLICATION class distinguishes data types that
+ have a wide, scattered use within a particular presentation context. PRIVATE distinguishes data types within
+ a particular organization or country. CONTEXT-SPECIFIC distinguishes members of a sequence or set, the
+ alternatives of a CHOICE, or universally tagged set members. Only the class number appears in braces for this
+ data type; the term CONTEXT-SPECIFIC does not appear.
+
+ -- http://www.obj-sys.com/asn1tutorial/node12.html */
+ $class = ($type >> 6) & 3;
+ switch ($class) {
+ case FILE_ASN1_CLASS_APPLICATION:
+ case FILE_ASN1_CLASS_PRIVATE:
+ case FILE_ASN1_CLASS_CONTEXT_SPECIFIC:
+ if (!$constructed) {
+ return array(
+ 'type' => $class,
+ 'constant' => $tag,
+ 'content' => $content,
+ 'length' => $length + $start - $current['start']
+ );
+ }
+
+ $newcontent = array();
+ if (strlen($content)) {
+ $newcontent = $this->_decode_ber($content, $start);
+ $length = $newcontent['length'];
+ if (substr($content, $length, 2) == "\0\0") {
+ $length+= 2;
+ }
+ $start+= $length;
+ $newcontent = array($newcontent);
+ }
+
+ return array(
+ 'type' => $class,
+ 'constant' => $tag,
+ // the array encapsulation is for BC with the old format
+ 'content' => $newcontent,
+ // the only time when $content['headerlength'] isn't defined is when the length is indefinite.
+ // the absence of $content['headerlength'] is how we know if something is indefinite or not.
+ // technically, it could be defined to be 2 and then another indicator could be used but whatever.
+ 'length' => $start - $current['start']
+ ) + $current;
+ }
+
+ $current+= array('type' => $tag);
+
+ // decode UNIVERSAL tags
+ switch ($tag) {
+ case FILE_ASN1_TYPE_BOOLEAN:
+ // "The contents octets shall consist of a single octet." -- paragraph 8.2.1
+ //if (strlen($content) != 1) {
+ // return false;
+ //}
+ $current['content'] = (bool) ord($content[0]);
+ break;
+ case FILE_ASN1_TYPE_INTEGER:
+ case FILE_ASN1_TYPE_ENUMERATED:
+ $current['content'] = new Math_BigInteger($content, -256);
+ break;
+ case FILE_ASN1_TYPE_REAL: // not currently supported
+ return false;
+ case FILE_ASN1_TYPE_BIT_STRING:
+ // The initial octet shall encode, as an unsigned binary integer with bit 1 as the least significant bit,
+ // the number of unused bits in the final subsequent octet. The number shall be in the range zero to
+ // seven.
+ if (!$constructed) {
+ $current['content'] = $content;
+ } else {
+ $temp = $this->_decode_ber($content, $start);
+ $length-= strlen($content);
+ $last = count($temp) - 1;
+ for ($i = 0; $i < $last; $i++) {
+ // all subtags should be bit strings
+ //if ($temp[$i]['type'] != FILE_ASN1_TYPE_BIT_STRING) {
+ // return false;
+ //}
+ $current['content'].= substr($temp[$i]['content'], 1);
+ }
+ // all subtags should be bit strings
+ //if ($temp[$last]['type'] != FILE_ASN1_TYPE_BIT_STRING) {
+ // return false;
+ //}
+ $current['content'] = $temp[$last]['content'][0] . $current['content'] . substr($temp[$i]['content'], 1);
+ }
+ break;
+ case FILE_ASN1_TYPE_OCTET_STRING:
+ if (!$constructed) {
+ $current['content'] = $content;
+ } else {
+ $current['content'] = '';
+ $length = 0;
+ while (substr($content, 0, 2) != "\0\0") {
+ $temp = $this->_decode_ber($content, $length + $start);
+ $this->_string_shift($content, $temp['length']);
+ // all subtags should be octet strings
+ //if ($temp['type'] != FILE_ASN1_TYPE_OCTET_STRING) {
+ // return false;
+ //}
+ $current['content'].= $temp['content'];
+ $length+= $temp['length'];
+ }
+ if (substr($content, 0, 2) == "\0\0") {
+ $length+= 2; // +2 for the EOC
+ }
+ }
+ break;
+ case FILE_ASN1_TYPE_NULL:
+ // "The contents octets shall not contain any octets." -- paragraph 8.8.2
+ //if (strlen($content)) {
+ // return false;
+ //}
+ break;
+ case FILE_ASN1_TYPE_SEQUENCE:
+ case FILE_ASN1_TYPE_SET:
+ $offset = 0;
+ $current['content'] = array();
+ while (strlen($content)) {
+ // if indefinite length construction was used and we have an end-of-content string next
+ // see paragraphs 8.1.1.3, 8.1.3.2, 8.1.3.6, 8.1.5, and (for an example) 8.6.4.2
+ if (!isset($current['headerlength']) && substr($content, 0, 2) == "\0\0") {
+ $length = $offset + 2; // +2 for the EOC
+ break 2;
+ }
+ $temp = $this->_decode_ber($content, $start + $offset);
+ $this->_string_shift($content, $temp['length']);
+ $current['content'][] = $temp;
+ $offset+= $temp['length'];
+ }
+ break;
+ case FILE_ASN1_TYPE_OBJECT_IDENTIFIER:
+ $temp = ord($this->_string_shift($content));
+ $current['content'] = sprintf('%d.%d', floor($temp / 40), $temp % 40);
+ $valuen = 0;
+ // process septets
+ while (strlen($content)) {
+ $temp = ord($this->_string_shift($content));
+ $valuen <<= 7;
+ $valuen |= $temp & 0x7F;
+ if (~$temp & 0x80) {
+ $current['content'].= ".$valuen";
+ $valuen = 0;
+ }
+ }
+ // the eighth bit of the last byte should not be 1
+ //if ($temp >> 7) {
+ // return false;
+ //}
+ break;
+ /* Each character string type shall be encoded as if it had been declared:
+ [UNIVERSAL x] IMPLICIT OCTET STRING
+
+ -- X.690-0207.pdf#page=23 (paragraph 8.21.3)
+
+ Per that, we're not going to do any validation. If there are any illegal characters in the string,
+ we don't really care */
+ case FILE_ASN1_TYPE_NUMERIC_STRING:
+ // 0,1,2,3,4,5,6,7,8,9, and space
+ case FILE_ASN1_TYPE_PRINTABLE_STRING:
+ // Upper and lower case letters, digits, space, apostrophe, left/right parenthesis, plus sign, comma,
+ // hyphen, full stop, solidus, colon, equal sign, question mark
+ case FILE_ASN1_TYPE_TELETEX_STRING:
+ // The Teletex character set in CCITT's T61, space, and delete
+ // see http://en.wikipedia.org/wiki/Teletex#Character_sets
+ case FILE_ASN1_TYPE_VIDEOTEX_STRING:
+ // The Videotex character set in CCITT's T.100 and T.101, space, and delete
+ case FILE_ASN1_TYPE_VISIBLE_STRING:
+ // Printing character sets of international ASCII, and space
+ case FILE_ASN1_TYPE_IA5_STRING:
+ // International Alphabet 5 (International ASCII)
+ case FILE_ASN1_TYPE_GRAPHIC_STRING:
+ // All registered G sets, and space
+ case FILE_ASN1_TYPE_GENERAL_STRING:
+ // All registered C and G sets, space and delete
+ case FILE_ASN1_TYPE_UTF8_STRING:
+ // ????
+ case FILE_ASN1_TYPE_BMP_STRING:
+ $current['content'] = $content;
+ break;
+ case FILE_ASN1_TYPE_UTC_TIME:
+ case FILE_ASN1_TYPE_GENERALIZED_TIME:
+ $current['content'] = $this->_decodeTime($content, $tag);
+ default:
+ }
+
+ $start+= $length;
+
+ // ie. length is the length of the full TLV encoding - it's not just the length of the value
+ return $current + array('length' => $start - $current['start']);
+ }
+
+ /**
+ * ASN.1 Map
+ *
+ * Provides an ASN.1 semantic mapping ($mapping) from a parsed BER-encoding to a human readable format.
+ *
+ * "Special" mappings may be applied on a per tag-name basis via $special.
+ *
+ * @param Array $decoded
+ * @param Array $mapping
+ * @param Array $special
+ * @return Array
+ * @access public
+ */
+ function asn1map($decoded, $mapping, $special = array())
+ {
+ if (isset($mapping['explicit']) && is_array($decoded['content'])) {
+ $decoded = $decoded['content'][0];
+ }
+
+ switch (true) {
+ case $mapping['type'] == FILE_ASN1_TYPE_ANY:
+ $intype = $decoded['type'];
+ if (isset($decoded['constant']) || !isset($this->ANYmap[$intype]) || ($this->encoded[$decoded['start']] & 0x20)) {
+ return new File_ASN1_Element(substr($this->encoded, $decoded['start'], $decoded['length']));
+ }
+ $inmap = $this->ANYmap[$intype];
+ if (is_string($inmap)) {
+ return array($inmap => $this->asn1map($decoded, array('type' => $intype) + $mapping, $special));
+ }
+ break;
+ case $mapping['type'] == FILE_ASN1_TYPE_CHOICE:
+ foreach ($mapping['children'] as $key => $option) {
+ switch (true) {
+ case isset($option['constant']) && $option['constant'] == $decoded['constant']:
+ case !isset($option['constant']) && $option['type'] == $decoded['type']:
+ $value = $this->asn1map($decoded, $option, $special);
+ break;
+ case !isset($option['constant']) && $option['type'] == FILE_ASN1_TYPE_CHOICE:
+ $v = $this->asn1map($decoded, $option, $special);
+ if (isset($v)) {
+ $value = $v;
+ }
+ }
+ if (isset($value)) {
+ if (isset($special[$key])) {
+ $value = call_user_func($special[$key], $value);
+ }
+ return array($key => $value);
+ }
+ }
+ return null;
+ case isset($mapping['implicit']):
+ case isset($mapping['explicit']):
+ case $decoded['type'] == $mapping['type']:
+ break;
+ default:
+ // if $decoded['type'] and $mapping['type'] are both strings, but different types of strings,
+ // let it through
+ switch (true) {
+ case $decoded['type'] < 18: // FILE_ASN1_TYPE_NUMERIC_STRING == 18
+ case $decoded['type'] > 30: // FILE_ASN1_TYPE_BMP_STRING == 30
+ case $mapping['type'] < 18:
+ case $mapping['type'] > 30:
+ return null;
+ }
+ }
+
+ if (isset($mapping['implicit'])) {
+ $decoded['type'] = $mapping['type'];
+ }
+
+ switch ($decoded['type']) {
+ case FILE_ASN1_TYPE_SEQUENCE:
+ $map = array();
+
+ // ignore the min and max
+ if (isset($mapping['min']) && isset($mapping['max'])) {
+ $child = $mapping['children'];
+ foreach ($decoded['content'] as $content) {
+ if (($map[] = $this->asn1map($content, $child, $special)) === null) {
+ return null;
+ }
+ }
+
+ return $map;
+ }
+
+ $n = count($decoded['content']);
+ $i = 0;
+
+ foreach ($mapping['children'] as $key => $child) {
+ $maymatch = $i < $n; // Match only existing input.
+ if ($maymatch) {
+ $temp = $decoded['content'][$i];
+
+ if ($child['type'] != FILE_ASN1_TYPE_CHOICE) {
+ // Get the mapping and input class & constant.
+ $childClass = $tempClass = FILE_ASN1_CLASS_UNIVERSAL;
+ $constant = null;
+ if (isset($temp['constant'])) {
+ $tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
+ }
+ if (isset($child['class'])) {
+ $childClass = $child['class'];
+ $constant = $child['cast'];
+ } elseif (isset($child['constant'])) {
+ $childClass = FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
+ $constant = $child['constant'];
+ }
+
+ if (isset($constant) && isset($temp['constant'])) {
+ // Can only match if constants and class match.
+ $maymatch = $constant == $temp['constant'] && $childClass == $tempClass;
+ } else {
+ // Can only match if no constant expected and type matches or is generic.
+ $maymatch = !isset($child['constant']) && array_search($child['type'], array($temp['type'], FILE_ASN1_TYPE_ANY, FILE_ASN1_TYPE_CHOICE)) !== false;
+ }
+ }
+ }
+
+ if ($maymatch) {
+ // Attempt submapping.
+ $candidate = $this->asn1map($temp, $child, $special);
+ $maymatch = $candidate !== null;
+ }
+
+ if ($maymatch) {
+ // Got the match: use it.
+ if (isset($special[$key])) {
+ $candidate = call_user_func($special[$key], $candidate);
+ }
+ $map[$key] = $candidate;
+ $i++;
+ } elseif (isset($child['default'])) {
+ $map[$key] = $child['default']; // Use default.
+ } elseif (!isset($child['optional'])) {
+ return null; // Syntax error.
+ }
+ }
+
+ // Fail mapping if all input items have not been consumed.
+ return $i < $n? null: $map;
+
+ // the main diff between sets and sequences is the encapsulation of the foreach in another for loop
+ case FILE_ASN1_TYPE_SET:
+ $map = array();
+
+ // ignore the min and max
+ if (isset($mapping['min']) && isset($mapping['max'])) {
+ $child = $mapping['children'];
+ foreach ($decoded['content'] as $content) {
+ if (($map[] = $this->asn1map($content, $child, $special)) === null) {
+ return null;
+ }
+ }
+
+ return $map;
+ }
+
+ for ($i = 0; $i < count($decoded['content']); $i++) {
+ $temp = $decoded['content'][$i];
+ $tempClass = FILE_ASN1_CLASS_UNIVERSAL;
+ if (isset($temp['constant'])) {
+ $tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
+ }
+
+ foreach ($mapping['children'] as $key => $child) {
+ if (isset($map[$key])) {
+ continue;
+ }
+ $maymatch = true;
+ if ($child['type'] != FILE_ASN1_TYPE_CHOICE) {
+ $childClass = FILE_ASN1_CLASS_UNIVERSAL;
+ $constant = null;
+ if (isset($child['class'])) {
+ $childClass = $child['class'];
+ $constant = $child['cast'];
+ } elseif (isset($child['constant'])) {
+ $childClass = FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
+ $constant = $child['constant'];
+ }
+
+ if (isset($constant) && isset($temp['constant'])) {
+ // Can only match if constants and class match.
+ $maymatch = $constant == $temp['constant'] && $childClass == $tempClass;
+ } else {
+ // Can only match if no constant expected and type matches or is generic.
+ $maymatch = !isset($child['constant']) && array_search($child['type'], array($temp['type'], FILE_ASN1_TYPE_ANY, FILE_ASN1_TYPE_CHOICE)) !== false;
+ }
+ }
+
+ if ($maymatch) {
+ // Attempt submapping.
+ $candidate = $this->asn1map($temp, $child, $special);
+ $maymatch = $candidate !== null;
+ }
+
+ if (!$maymatch) {
+ break;
+ }
+
+ // Got the match: use it.
+ if (isset($special[$key])) {
+ $candidate = call_user_func($special[$key], $candidate);
+ }
+ $map[$key] = $candidate;
+ break;
+ }
+ }
+
+ foreach ($mapping['children'] as $key => $child) {
+ if (!isset($map[$key])) {
+ if (isset($child['default'])) {
+ $map[$key] = $child['default'];
+ } elseif (!isset($child['optional'])) {
+ return null;
+ }
+ }
+ }
+ return $map;
+ case FILE_ASN1_TYPE_OBJECT_IDENTIFIER:
+ return isset($this->oids[$decoded['content']]) ? $this->oids[$decoded['content']] : $decoded['content'];
+ case FILE_ASN1_TYPE_UTC_TIME:
+ case FILE_ASN1_TYPE_GENERALIZED_TIME:
+ if (isset($mapping['implicit'])) {
+ $decoded['content'] = $this->_decodeTime($decoded['content'], $decoded['type']);
+ }
+ return @date($this->format, $decoded['content']);
+ case FILE_ASN1_TYPE_BIT_STRING:
+ if (isset($mapping['mapping'])) {
+ $offset = ord($decoded['content'][0]);
+ $size = (strlen($decoded['content']) - 1) * 8 - $offset;
+ /*
+ From X.680-0207.pdf#page=46 (21.7):
+
+ "When a "NamedBitList" is used in defining a bitstring type ASN.1 encoding rules are free to add (or remove)
+ arbitrarily any trailing 0 bits to (or from) values that are being encoded or decoded. Application designers should
+ therefore ensure that different semantics are not associated with such values which differ only in the number of trailing
+ 0 bits."
+ */
+ $bits = count($mapping['mapping']) == $size ? array() : array_fill(0, count($mapping['mapping']) - $size, false);
+ for ($i = strlen($decoded['content']) - 1; $i > 0; $i--) {
+ $current = ord($decoded['content'][$i]);
+ for ($j = $offset; $j < 8; $j++) {
+ $bits[] = (bool) ($current & (1 << $j));
+ }
+ $offset = 0;
+ }
+ $values = array();
+ $map = array_reverse($mapping['mapping']);
+ foreach ($map as $i => $value) {
+ if ($bits[$i]) {
+ $values[] = $value;
+ }
+ }
+ return $values;
+ }
+ case FILE_ASN1_TYPE_OCTET_STRING:
+ return base64_encode($decoded['content']);
+ case FILE_ASN1_TYPE_NULL:
+ return '';
+ case FILE_ASN1_TYPE_BOOLEAN:
+ return $decoded['content'];
+ case FILE_ASN1_TYPE_NUMERIC_STRING:
+ case FILE_ASN1_TYPE_PRINTABLE_STRING:
+ case FILE_ASN1_TYPE_TELETEX_STRING:
+ case FILE_ASN1_TYPE_VIDEOTEX_STRING:
+ case FILE_ASN1_TYPE_IA5_STRING:
+ case FILE_ASN1_TYPE_GRAPHIC_STRING:
+ case FILE_ASN1_TYPE_VISIBLE_STRING:
+ case FILE_ASN1_TYPE_GENERAL_STRING:
+ case FILE_ASN1_TYPE_UNIVERSAL_STRING:
+ case FILE_ASN1_TYPE_UTF8_STRING:
+ case FILE_ASN1_TYPE_BMP_STRING:
+ return $decoded['content'];
+ case FILE_ASN1_TYPE_INTEGER:
+ case FILE_ASN1_TYPE_ENUMERATED:
+ $temp = $decoded['content'];
+ if (isset($mapping['implicit'])) {
+ $temp = new Math_BigInteger($decoded['content'], -256);
+ }
+ if (isset($mapping['mapping'])) {
+ $temp = (int) $temp->toString();
+ return isset($mapping['mapping'][$temp]) ?
+ $mapping['mapping'][$temp] :
+ false;
+ }
+ return $temp;
+ }
+ }
+
+ /**
+ * ASN.1 Encode
+ *
+ * DER-encodes an ASN.1 semantic mapping ($mapping). Some libraries would probably call this function
+ * an ASN.1 compiler.
+ *
+ * "Special" mappings can be applied via $special.
+ *
+ * @param String $source
+ * @param String $mapping
+ * @param Integer $idx
+ * @return String
+ * @access public
+ */
+ function encodeDER($source, $mapping, $special = array())
+ {
+ $this->location = array();
+ return $this->_encode_der($source, $mapping, null, $special);
+ }
+
+ /**
+ * ASN.1 Encode (Helper function)
+ *
+ * @param String $source
+ * @param String $mapping
+ * @param Integer $idx
+ * @return String
+ * @access private
+ */
+ function _encode_der($source, $mapping, $idx = null, $special = array())
+ {
+ if (is_object($source) && strtolower(get_class($source)) == 'file_asn1_element') {
+ return $source->element;
+ }
+
+ // do not encode (implicitly optional) fields with value set to default
+ if (isset($mapping['default']) && $source === $mapping['default']) {
+ return '';
+ }
+
+ if (isset($idx)) {
+ if (isset($special[$idx])) {
+ $source = call_user_func($special[$idx], $source);
+ }
+ $this->location[] = $idx;
+ }
+
+ $tag = $mapping['type'];
+
+ switch ($tag) {
+ case FILE_ASN1_TYPE_SET: // Children order is not important, thus process in sequence.
+ case FILE_ASN1_TYPE_SEQUENCE:
+ $tag|= 0x20; // set the constructed bit
+ $value = '';
+
+ // ignore the min and max
+ if (isset($mapping['min']) && isset($mapping['max'])) {
+ $child = $mapping['children'];
+
+ foreach ($source as $content) {
+ $temp = $this->_encode_der($content, $child, null, $special);
+ if ($temp === false) {
+ return false;
+ }
+ $value.= $temp;
+ }
+ break;
+ }
+
+ foreach ($mapping['children'] as $key => $child) {
+ if (!isset($source[$key])) {
+ if (!isset($child['optional'])) {
+ return false;
+ }
+ continue;
+ }
+
+ $temp = $this->_encode_der($source[$key], $child, $key, $special);
+ if ($temp === false) {
+ return false;
+ }
+
+ // An empty child encoding means it has been optimized out.
+ // Else we should have at least one tag byte.
+ if ($temp === '') {
+ continue;
+ }
+
+ // if isset($child['constant']) is true then isset($child['optional']) should be true as well
+ if (isset($child['constant'])) {
+ /*
+ From X.680-0207.pdf#page=58 (30.6):
+
+ "The tagging construction specifies explicit tagging if any of the following holds:
+ ...
+ c) the "Tag Type" alternative is used and the value of "TagDefault" for the module is IMPLICIT TAGS or
+ AUTOMATIC TAGS, but the type defined by "Type" is an untagged choice type, an untagged open type, or
+ an untagged "DummyReference" (see ITU-T Rec. X.683 | ISO/IEC 8824-4, 8.3)."
+ */
+ if (isset($child['explicit']) || $child['type'] == FILE_ASN1_TYPE_CHOICE) {
+ $subtag = chr((FILE_ASN1_CLASS_CONTEXT_SPECIFIC << 6) | 0x20 | $child['constant']);
+ $temp = $subtag . $this->_encodeLength(strlen($temp)) . $temp;
+ } else {
+ $subtag = chr((FILE_ASN1_CLASS_CONTEXT_SPECIFIC << 6) | (ord($temp[0]) & 0x20) | $child['constant']);
+ $temp = $subtag . substr($temp, 1);
+ }
+ }
+ $value.= $temp;
+ }
+ break;
+ case FILE_ASN1_TYPE_CHOICE:
+ $temp = false;
+
+ foreach ($mapping['children'] as $key => $child) {
+ if (!isset($source[$key])) {
+ continue;
+ }
+
+ $temp = $this->_encode_der($source[$key], $child, $key, $special);
+ if ($temp === false) {
+ return false;
+ }
+
+ // An empty child encoding means it has been optimized out.
+ // Else we should have at least one tag byte.
+ if ($temp === '') {
+ continue;
+ }
+
+ $tag = ord($temp[0]);
+
+ // if isset($child['constant']) is true then isset($child['optional']) should be true as well
+ if (isset($child['constant'])) {
+ if (isset($child['explicit']) || $child['type'] == FILE_ASN1_TYPE_CHOICE) {
+ $subtag = chr((FILE_ASN1_CLASS_CONTEXT_SPECIFIC << 6) | 0x20 | $child['constant']);
+ $temp = $subtag . $this->_encodeLength(strlen($temp)) . $temp;
+ } else {
+ $subtag = chr((FILE_ASN1_CLASS_CONTEXT_SPECIFIC << 6) | (ord($temp[0]) & 0x20) | $child['constant']);
+ $temp = $subtag . substr($temp, 1);
+ }
+ }
+ }
+
+ if (isset($idx)) {
+ array_pop($this->location);
+ }
+
+ if ($temp && isset($mapping['cast'])) {
+ $temp[0] = chr(($mapping['class'] << 6) | ($tag & 0x20) | $mapping['cast']);
+ }
+
+ return $temp;
+ case FILE_ASN1_TYPE_INTEGER:
+ case FILE_ASN1_TYPE_ENUMERATED:
+ if (!isset($mapping['mapping'])) {
+ if (is_numeric($source)) {
+ $source = new Math_BigInteger($source);
+ }
+ $value = $source->toBytes(true);
+ } else {
+ $value = array_search($source, $mapping['mapping']);
+ if ($value === false) {
+ return false;
+ }
+ $value = new Math_BigInteger($value);
+ $value = $value->toBytes(true);
+ }
+ if (!strlen($value)) {
+ $value = chr(0);
+ }
+ break;
+ case FILE_ASN1_TYPE_UTC_TIME:
+ case FILE_ASN1_TYPE_GENERALIZED_TIME:
+ $format = $mapping['type'] == FILE_ASN1_TYPE_UTC_TIME ? 'y' : 'Y';
+ $format.= 'mdHis';
+ $value = @gmdate($format, strtotime($source)) . 'Z';
+ break;
+ case FILE_ASN1_TYPE_BIT_STRING:
+ if (isset($mapping['mapping'])) {
+ $bits = array_fill(0, count($mapping['mapping']), 0);
+ $size = 0;
+ for ($i = 0; $i < count($mapping['mapping']); $i++) {
+ if (in_array($mapping['mapping'][$i], $source)) {
+ $bits[$i] = 1;
+ $size = $i;
+ }
+ }
+
+ if (isset($mapping['min']) && $mapping['min'] >= 1 && $size < $mapping['min']) {
+ $size = $mapping['min'] - 1;
+ }
+
+ $offset = 8 - (($size + 1) & 7);
+ $offset = $offset !== 8 ? $offset : 0;
+
+ $value = chr($offset);
+
+ for ($i = $size + 1; $i < count($mapping['mapping']); $i++) {
+ unset($bits[$i]);
+ }
+
+ $bits = implode('', array_pad($bits, $size + $offset + 1, 0));
+ $bytes = explode(' ', rtrim(chunk_split($bits, 8, ' ')));
+ foreach ($bytes as $byte) {
+ $value.= chr(bindec($byte));
+ }
+
+ break;
+ }
+ case FILE_ASN1_TYPE_OCTET_STRING:
+ /* The initial octet shall encode, as an unsigned binary integer with bit 1 as the least significant bit,
+ the number of unused bits in the final subsequent octet. The number shall be in the range zero to seven.
+
+ -- http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#page=16 */
+ $value = base64_decode($source);
+ break;
+ case FILE_ASN1_TYPE_OBJECT_IDENTIFIER:
+ $oid = preg_match('#(?:\d+\.)+#', $source) ? $source : array_search($source, $this->oids);
+ if ($oid === false) {
+ user_error('Invalid OID');
+ return false;
+ }
+ $value = '';
+ $parts = explode('.', $oid);
+ $value = chr(40 * $parts[0] + $parts[1]);
+ for ($i = 2; $i < count($parts); $i++) {
+ $temp = '';
+ if (!$parts[$i]) {
+ $temp = "\0";
+ } else {
+ while ($parts[$i]) {
+ $temp = chr(0x80 | ($parts[$i] & 0x7F)) . $temp;
+ $parts[$i] >>= 7;
+ }
+ $temp[strlen($temp) - 1] = $temp[strlen($temp) - 1] & chr(0x7F);
+ }
+ $value.= $temp;
+ }
+ break;
+ case FILE_ASN1_TYPE_ANY:
+ $loc = $this->location;
+ if (isset($idx)) {
+ array_pop($this->location);
+ }
+
+ switch (true) {
+ case !isset($source):
+ return $this->_encode_der(null, array('type' => FILE_ASN1_TYPE_NULL) + $mapping, null, $special);
+ case is_int($source):
+ case is_object($source) && strtolower(get_class($source)) == 'math_biginteger':
+ return $this->_encode_der($source, array('type' => FILE_ASN1_TYPE_INTEGER) + $mapping, null, $special);
+ case is_float($source):
+ return $this->_encode_der($source, array('type' => FILE_ASN1_TYPE_REAL) + $mapping, null, $special);
+ case is_bool($source):
+ return $this->_encode_der($source, array('type' => FILE_ASN1_TYPE_BOOLEAN) + $mapping, null, $special);
+ case is_array($source) && count($source) == 1:
+ $typename = implode('', array_keys($source));
+ $outtype = array_search($typename, $this->ANYmap, true);
+ if ($outtype !== false) {
+ return $this->_encode_der($source[$typename], array('type' => $outtype) + $mapping, null, $special);
+ }
+ }
+
+ $filters = $this->filters;
+ foreach ($loc as $part) {
+ if (!isset($filters[$part])) {
+ $filters = false;
+ break;
+ }
+ $filters = $filters[$part];
+ }
+ if ($filters === false) {
+ user_error('No filters defined for ' . implode('/', $loc));
+ return false;
+ }
+ return $this->_encode_der($source, $filters + $mapping, null, $special);
+ case FILE_ASN1_TYPE_NULL:
+ $value = '';
+ break;
+ case FILE_ASN1_TYPE_NUMERIC_STRING:
+ case FILE_ASN1_TYPE_TELETEX_STRING:
+ case FILE_ASN1_TYPE_PRINTABLE_STRING:
+ case FILE_ASN1_TYPE_UNIVERSAL_STRING:
+ case FILE_ASN1_TYPE_UTF8_STRING:
+ case FILE_ASN1_TYPE_BMP_STRING:
+ case FILE_ASN1_TYPE_IA5_STRING:
+ case FILE_ASN1_TYPE_VISIBLE_STRING:
+ case FILE_ASN1_TYPE_VIDEOTEX_STRING:
+ case FILE_ASN1_TYPE_GRAPHIC_STRING:
+ case FILE_ASN1_TYPE_GENERAL_STRING:
+ $value = $source;
+ break;
+ case FILE_ASN1_TYPE_BOOLEAN:
+ $value = $source ? "\xFF" : "\x00";
+ break;
+ default:
+ user_error('Mapping provides no type definition for ' . implode('/', $this->location));
+ return false;
+ }
+
+ if (isset($idx)) {
+ array_pop($this->location);
+ }
+
+ if (isset($mapping['cast'])) {
+ if (isset($mapping['explicit']) || $mapping['type'] == FILE_ASN1_TYPE_CHOICE) {
+ $value = chr($tag) . $this->_encodeLength(strlen($value)) . $value;
+ $tag = ($mapping['class'] << 6) | 0x20 | $mapping['cast'];
+ } else {
+ $tag = ($mapping['class'] << 6) | (ord($temp[0]) & 0x20) | $mapping['cast'];
+ }
+ }
+
+ return chr($tag) . $this->_encodeLength(strlen($value)) . $value;
+ }
+
+ /**
+ * DER-encode the length
+ *
+ * DER supports lengths up to (2**8)**127, however, we'll only support lengths up to (2**8)**4. See
+ * {@link http://itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#p=13 X.690 paragraph 8.1.3} for more information.
+ *
+ * @access private
+ * @param Integer $length
+ * @return String
+ */
+ function _encodeLength($length)
+ {
+ if ($length <= 0x7F) {
+ return chr($length);
+ }
+
+ $temp = ltrim(pack('N', $length), chr(0));
+ return pack('Ca*', 0x80 | strlen($temp), $temp);
+ }
+
+ /**
+ * BER-decode the time
+ *
+ * Called by _decode_ber() and in the case of implicit tags asn1map().
+ *
+ * @access private
+ * @param String $content
+ * @param Integer $tag
+ * @return String
+ */
+ function _decodeTime($content, $tag)
+ {
+ /* UTCTime:
+ http://tools.ietf.org/html/rfc5280#section-4.1.2.5.1
+ http://www.obj-sys.com/asn1tutorial/node15.html
+
+ GeneralizedTime:
+ http://tools.ietf.org/html/rfc5280#section-4.1.2.5.2
+ http://www.obj-sys.com/asn1tutorial/node14.html */
+
+ $pattern = $tag == FILE_ASN1_TYPE_UTC_TIME ?
+ '#(..)(..)(..)(..)(..)(..)(.*)#' :
+ '#(....)(..)(..)(..)(..)(..).*([Z+-].*)$#';
+
+ preg_match($pattern, $content, $matches);
+
+ list(, $year, $month, $day, $hour, $minute, $second, $timezone) = $matches;
+
+ if ($tag == FILE_ASN1_TYPE_UTC_TIME) {
+ $year = $year >= 50 ? "19$year" : "20$year";
+ }
+
+ if ($timezone == 'Z') {
+ $mktime = 'gmmktime';
+ $timezone = 0;
+ } elseif (preg_match('#([+-])(\d\d)(\d\d)#', $timezone, $matches)) {
+ $mktime = 'gmmktime';
+ $timezone = 60 * $matches[3] + 3600 * $matches[2];
+ if ($matches[1] == '-') {
+ $timezone = -$timezone;
+ }
+ } else {
+ $mktime = 'mktime';
+ $timezone = 0;
+ }
+
+ return @$mktime($hour, $minute, $second, $month, $day, $year) + $timezone;
+ }
+
+ /**
+ * Set the time format
+ *
+ * Sets the time / date format for asn1map().
+ *
+ * @access public
+ * @param String $format
+ */
+ function setTimeFormat($format)
+ {
+ $this->format = $format;
+ }
+
+ /**
+ * Load OIDs
+ *
+ * Load the relevant OIDs for a particular ASN.1 semantic mapping.
+ *
+ * @access public
+ * @param Array $oids
+ */
+ function loadOIDs($oids)
+ {
+ $this->oids = $oids;
+ }
+
+ /**
+ * Load filters
+ *
+ * See File_X509, etc, for an example.
+ *
+ * @access public
+ * @param Array $filters
+ */
+ function loadFilters($filters)
+ {
+ $this->filters = $filters;
+ }
+
+ /**
+ * String Shift
+ *
+ * Inspired by array_shift
+ *
+ * @param String $string
+ * @param optional Integer $index
+ * @return String
+ * @access private
+ */
+ function _string_shift(&$string, $index = 1)
+ {
+ $substr = substr($string, 0, $index);
+ $string = substr($string, $index);
+ return $substr;
+ }
+
+ /**
+ * String type conversion
+ *
+ * This is a lazy conversion, dealing only with character size.
+ * No real conversion table is used.
+ *
+ * @param String $in
+ * @param optional Integer $from
+ * @param optional Integer $to
+ * @return String
+ * @access public
+ */
+ function convert($in, $from = FILE_ASN1_TYPE_UTF8_STRING, $to = FILE_ASN1_TYPE_UTF8_STRING)
+ {
+ if (!isset($this->stringTypeSize[$from]) || !isset($this->stringTypeSize[$to])) {
+ return false;
+ }
+ $insize = $this->stringTypeSize[$from];
+ $outsize = $this->stringTypeSize[$to];
+ $inlength = strlen($in);
+ $out = '';
+
+ for ($i = 0; $i < $inlength;) {
+ if ($inlength - $i < $insize) {
+ return false;
+ }
+
+ // Get an input character as a 32-bit value.
+ $c = ord($in[$i++]);
+ switch (true) {
+ case $insize == 4:
+ $c = ($c << 8) | ord($in[$i++]);
+ $c = ($c << 8) | ord($in[$i++]);
+ case $insize == 2:
+ $c = ($c << 8) | ord($in[$i++]);
+ case $insize == 1:
+ break;
+ case ($c & 0x80) == 0x00:
+ break;
+ case ($c & 0x40) == 0x00:
+ return false;
+ default:
+ $bit = 6;
+ do {
+ if ($bit > 25 || $i >= $inlength || (ord($in[$i]) & 0xC0) != 0x80) {
+ return false;
+ }
+ $c = ($c << 6) | (ord($in[$i++]) & 0x3F);
+ $bit += 5;
+ $mask = 1 << $bit;
+ } while ($c & $bit);
+ $c &= $mask - 1;
+ break;
+ }
+
+ // Convert and append the character to output string.
+ $v = '';
+ switch (true) {
+ case $outsize == 4:
+ $v .= chr($c & 0xFF);
+ $c >>= 8;
+ $v .= chr($c & 0xFF);
+ $c >>= 8;
+ case $outsize == 2:
+ $v .= chr($c & 0xFF);
+ $c >>= 8;
+ case $outsize == 1:
+ $v .= chr($c & 0xFF);
+ $c >>= 8;
+ if ($c) {
+ return false;
+ }
+ break;
+ case ($c & 0x80000000) != 0:
+ return false;
+ case $c >= 0x04000000:
+ $v .= chr(0x80 | ($c & 0x3F));
+ $c = ($c >> 6) | 0x04000000;
+ case $c >= 0x00200000:
+ $v .= chr(0x80 | ($c & 0x3F));
+ $c = ($c >> 6) | 0x00200000;
+ case $c >= 0x00010000:
+ $v .= chr(0x80 | ($c & 0x3F));
+ $c = ($c >> 6) | 0x00010000;
+ case $c >= 0x00000800:
+ $v .= chr(0x80 | ($c & 0x3F));
+ $c = ($c >> 6) | 0x00000800;
+ case $c >= 0x00000080:
+ $v .= chr(0x80 | ($c & 0x3F));
+ $c = ($c >> 6) | 0x000000C0;
+ default:
+ $v .= chr($c);
+ break;
+ }
+ $out .= strrev($v);
+ }
+ return $out;
+ }
+}
projects / friendica-addons.git / blobdiff