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Check phpinfo() is available before using

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Fixes an issue I raised at https://github.com/phpseclib/phpseclib/issues/1255

Proof of logic at https://3v4l.org/RqrHt

I ended up moving more code than discussed in the issue - initially to avoid `$content` being undefined when it came to `preg_match_all()`, but also as it made sense grouping the code that way. Also, initialising `$versions` outside the check, right at the start ensures it's always defined for the `switch` code further down.
This commit is contained in:
Wes 2018-03-24 11:05:16 +00:00
parent fc90c58f7f
commit d4a98457bc
2 changed files with 38 additions and 30 deletions
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34
phpseclib/Crypt/RSA.php
View File

@ -468,23 +468,27 @@ class RSA
break; break;
case extension_loaded('openssl') && file_exists($this->configFile): case extension_loaded('openssl') && file_exists($this->configFile):
// some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work // some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work
ob_start();
@phpinfo();
$content = ob_get_contents();
ob_end_clean();
preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
$versions = array(); $versions = array();
if (!empty($matches[1])) {
for ($i = 0; $i < count($matches[1]); $i++) {
$fullVersion = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
// Remove letter part in OpenSSL version // avoid generating errors (even with suppression) when phpinfo() is disabled (common in production systems)
if (!preg_match('/(\d+\.\d+\.\d+)/i', $fullVersion, $m)) { if (strpos(ini_get('disable_functions'), 'phpinfo') === false) {
$versions[$matches[1][$i]] = $fullVersion; ob_start();
} else { @phpinfo();
$versions[$matches[1][$i]] = $m[0]; $content = ob_get_contents();
ob_end_clean();
preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
if (!empty($matches[1])) {
for ($i = 0; $i < count($matches[1]); $i++) {
$fullVersion = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
// Remove letter part in OpenSSL version
if (!preg_match('/(\d+\.\d+\.\d+)/i', $fullVersion, $m)) {
$versions[$matches[1][$i]] = $fullVersion;
} else {
$versions[$matches[1][$i]] = $m[0];
}
} }
} }
} }

34
phpseclib/Math/BigInteger.php
View File

@ -266,23 +266,27 @@ class BigInteger
if (extension_loaded('openssl') && !defined('MATH_BIGINTEGER_OPENSSL_DISABLE') && !defined('MATH_BIGINTEGER_OPENSSL_ENABLED')) { if (extension_loaded('openssl') && !defined('MATH_BIGINTEGER_OPENSSL_DISABLE') && !defined('MATH_BIGINTEGER_OPENSSL_ENABLED')) {
// some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work // some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work
ob_start();
@phpinfo();
$content = ob_get_contents();
ob_end_clean();
preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
$versions = array(); $versions = array();
if (!empty($matches[1])) {
for ($i = 0; $i < count($matches[1]); $i++) {
$fullVersion = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
// Remove letter part in OpenSSL version // avoid generating errors (even with suppression) when phpinfo() is disabled (common in production systems)
if (!preg_match('/(\d+\.\d+\.\d+)/i', $fullVersion, $m)) { if (strpos(ini_get('disable_functions'), 'phpinfo') === false) {
$versions[$matches[1][$i]] = $fullVersion; ob_start();
} else { @phpinfo();
$versions[$matches[1][$i]] = $m[0]; $content = ob_get_contents();
ob_end_clean();
preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
if (!empty($matches[1])) {
for ($i = 0; $i < count($matches[1]); $i++) {
$fullVersion = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
// Remove letter part in OpenSSL version
if (!preg_match('/(\d+\.\d+\.\d+)/i', $fullVersion, $m)) {
$versions[$matches[1][$i]] = $fullVersion;
} else {
$versions[$matches[1][$i]] = $m[0];
}
} }
} }
} }