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SSH2: revamp dynamic listing of crypto algorithms

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This commit is contained in:
terrafrost 2013-06-25 15:21:43 -05:00
parent adf8afd4eb
commit a3e6e1578b
1 changed files with 30 additions and 4 deletions
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34
phpseclib/Net/SSH2.php
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@ -980,25 +980,31 @@ class Net_SSH2 {
'none' // OPTIONAL no encryption; NOT RECOMMENDED
);
if (!file_exists('Crypt/AES.php')) {
if (!$this->_is_includable('Crypt/RC4.php')) {
$encryption_algorithms = array_diff(
$encryption_algorithms,
array('arcfour256', 'arcfour128', 'arcfour')
);
}
if (!$this->_is_includable('Crypt/AES.php')) {
$encryption_algorithms = array_diff(
$encryption_algorithms,
array('aes128-ctr', 'aes192-ctr', 'aes256-ctr', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc')
);
}
if (!file_exists('Crypt/Twofish.php')) {
if (!$this->_is_includable('Crypt/Twofish.php')) {
$encryption_algorithms = array_diff(
$encryption_algorithms,
array('twofish128-ctr', 'twofish192-ctr', 'twofish256-ctr', 'twofish128-cbc', 'twofish192-cbc', 'twofish256-cbc', 'twofish-cbc')
);
}
if (!file_exists('Crypt/Blowfish.php')) {
if (!$this->_is_includable('Crypt/Blowfish.php')) {
$encryption_algorithms = array_diff(
$encryption_algorithms,
array('blowfish-ctr', 'blowfish-cbc')
);
}
if (!file_exists('Crypt/TripleDES.php')) {
if (!$this->_is_includable('Crypt/TripleDES.php')) {
$encryption_algorithms = array_diff(
$encryption_algorithms,
array('3des-ctr', '3des-cbc')
@ -3387,4 +3393,24 @@ class Net_SSH2 {
}
return $this->exit_status;
}
/**
* Is a path includable?
*
* @return Boolean
* @access private
*/
function _is_includable($suffix)
{
foreach (explode(PATH_SEPARATOR, get_include_path()) as $prefix) {
$ds = substr($prefix, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
$file = $prefix . $ds . $suffix;
if (file_exists($file)) {
return true;
}
}
return false;
}
}