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ASN1: fix issue with non-constructed context-specific tags

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This commit is contained in:
terrafrost 2014-09-22 01:01:34 -05:00
parent 5085202f1f
commit c6ad2b69ba
1 changed files with 11 additions and 6 deletions
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17
phpseclib/File/ASN1.php
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@ -347,10 +347,15 @@ class File_ASN1
case FILE_ASN1_CLASS_APPLICATION:
case FILE_ASN1_CLASS_PRIVATE:
case FILE_ASN1_CLASS_CONTEXT_SPECIFIC:
$newcontent = $this->_decode_ber($content, $start);
$length = $newcontent['length'];
if (substr($content, $length, 2) == "\0\0") {
$length+= 2;
if ($constructed) {
$newcontent = $this->_decode_ber($content, $start);
$length = $newcontent['length'];
if (substr($content, $length, 2) == "\0\0") {
$length+= 2;
}
// the array encapsulation is for BC with the old format
$content = array($newcontent);
}
$start+= $length;
@ -359,7 +364,7 @@ class File_ASN1
'type' => $class,
'constant' => $tag,
// the array encapsulation is for BC with the old format
'content' => array($newcontent),
'content' => $content,
// 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.
@ -1343,4 +1348,4 @@ class File_ASN1
}
return $out;
}
}
}