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ENHANCEMENT Allowing filtered arguments on specific functions like mysql_connect() in SS_Backtrace

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This commit is contained in:
Ingo Schommer 2011-05-26 22:04:01 +12:00
parent 3588cefa30
commit 0adac9d40b
2 changed files with 85 additions and 0 deletions
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45
dev/Backtrace.php
View File

@ -5,6 +5,36 @@
*/
class SS_Backtrace {
/**
* @var array Replaces all arguments with a '<filtered>' string,
* mostly for security reasons. Use string values for global functions,
* and array notation for class methods.
* PHP's debug_backtrace() doesn't allow to inspect the argument names,
* so all arguments of the provided functions will be filtered out.
*/
static $ignore_function_args = array(
'mysql_connect',
'mssql_connect',
'pg_connect',
array('DB', 'connect'),
array('Security', 'check_default_admin'),
array('Security', 'encrypt_password'),
array('Security', 'setDefaultAdmin'),
array('DB', 'createDatabase'),
array('Member', 'checkPassword'),
array('Member', 'changePassword'),
array('MemberPassword', 'checkPassword'),
array('PasswordValidator', 'validate'),
array('PasswordEncryptor_PHPHash', 'encrypt'),
array('PasswordEncryptor_PHPHash', 'salt'),
array('PasswordEncryptor_LegacyPHPHash', 'encrypt'),
array('PasswordEncryptor_LegacyPHPHash', 'salt'),
array('PasswordEncryptor_MySQLPassword', 'encrypt'),
array('PasswordEncryptor_MySQLPassword', 'salt'),
array('PasswordEncryptor_MySQLOldPassword', 'encrypt'),
array('PasswordEncryptor_MySQLOldPassword', 'salt'),
);
/**
* Return debug_backtrace() results with functions filtered
* specific to the debugging system, and not the trace.
@ -53,6 +83,21 @@ class SS_Backtrace {
array_shift($bt);
}
// Filter out arguments
foreach($bt as $i => $frame) {
$match = false;
if(@$bt[$i]['class']) {
foreach(self::$ignore_function_args as $fnSpec) {
if(is_array($fnSpec) && $bt[$i]['class'] == $fnSpec[0] && $bt[$i]['function'] == $fnSpec[1]) $match = true;
}
} else {
if(in_array($bt[$i]['function'], self::$ignore_function_args)) $match = true;
}
if($match) {
foreach($bt[$i]['args'] as $j => $arg) $bt[$i]['args'][$j] = '<filtered>';
}
}
return $bt;
}

40
tests/dev/BacktraceTest.php
View File

@ -23,4 +23,44 @@ class BacktraceTest extends SapphireTest {
);
}
function testIgnoredFunctionArgs() {
$orig = SS_Backtrace::$ignore_function_args;
$bt = array(
array(
'type' => '->',
'file' => 'MyFile.php',
'line' => 99,
'function' => 'myIgnoredGlobalFunction',
'args' => array('password' => 'secred',)
),
array(
'class' => 'MyClass',
'type' => '->',
'file' => 'MyFile.php',
'line' => 99,
'function' => 'myIgnoredClassFunction',
'args' => array('password' => 'secred',)
),
array(
'class' => 'MyClass',
'type' => '->',
'file' => 'MyFile.php',
'line' => 99,
'function' => 'myFunction',
'args' => array('myarg' => 'myval')
)
);
SS_Backtrace::$ignore_function_args[] = array('MyClass', 'myIgnoredClassFunction');
SS_Backtrace::$ignore_function_args[] = 'myIgnoredGlobalFunction';
$filtered = SS_Backtrace::filter_backtrace($bt);
$this->assertEquals('<filtered>', $filtered[0]['args']['password'], 'Filters global functions');
$this->assertEquals('<filtered>', $filtered[1]['args']['password'], 'Filters class functions');
$this->assertEquals('myval', $filtered[2]['args']['myarg'], 'Doesnt filter other functions');
SS_Backtrace::$ignore_function_args = $orig;
}
}