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ASN1: asn1map(): do not rely on input fields to determine mapping parameters.

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This commit is contained in:
monnerat 2012-10-12 00:58:36 +01:00
parent d9a3dafa0a
commit 50962f9cd3
1 changed files with 24 additions and 13 deletions
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37
phpseclib/File/ASN1.php
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@ -432,12 +432,12 @@ class File_ASN1 {
* *
* Provides an ASN.1 semantic mapping ($mapping) from a parsed BER-encoding to a human readable format. * Provides an ASN.1 semantic mapping ($mapping) from a parsed BER-encoding to a human readable format.
* *
* @param String $encoded * @param Array $decoded
* @param Integer $start * @param Array $mapping
* @return Array * @return Array
* @access public * @access public
*/ */
function asn1map($decoded, $mapping, $idx = NULL) function asn1map($decoded, $mapping)
{ {
if (isset($mapping['explicit'])) { if (isset($mapping['explicit'])) {
$decoded = $decoded['content'][0]; $decoded = $decoded['content'][0];
@ -506,13 +506,18 @@ class File_ASN1 {
continue; continue;
} }
$childClass = $tempClass = FILE_ASN1_CLASS_UNIVERSAL;
$constant = NULL;
if (isset($temp['constant'])) { if (isset($temp['constant'])) {
$tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC; $tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
$childClass = isset($child['class']) ? $child['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC; }
$constant = isset($temp['class']) ? $child['cast'] : $child['constant']; if (isset($child['class'])) {
} else { $childClass = $child['class'];
$childClass = $tempClass = FILE_ASN1_CLASS_UNIVERSAL; $constant = $child['cast'];
$constant = NULL; }
elseif (isset($child['constant'])) {
$childClass = FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
$constant = $child['constant'];
} }
if (isset($child['optional'])) { if (isset($child['optional'])) {
@ -590,14 +595,20 @@ class File_ASN1 {
continue; continue;
} }
$childClass = $tempClass = FILE_ASN1_CLASS_UNIVERSAL;
$constant = NULL;
if (isset($temp['constant'])) { if (isset($temp['constant'])) {
$tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC; $tempClass = isset($temp['class']) ? $temp['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
$childClass = isset($child['class']) ? $child['class'] : FILE_ASN1_CLASS_CONTEXT_SPECIFIC;
$constant = isset($temp['class']) ? $child['cast'] : $child['constant'];
} else {
$childClass = $tempClass = 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($temp['constant'])) { if (isset($constant) && isset($temp['constant'])) {
if (($constant == $temp['constant']) && ($childClass == $tempClass)) { if (($constant == $temp['constant']) && ($childClass == $tempClass)) {
$map[$key] = $this->asn1map($temp['content'], $child); $map[$key] = $this->asn1map($temp['content'], $child);