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psalm/tests/TaintTest.php
Matt Brown 8c716f8be7 Support taints in new $_GET["a"] calls
2022-07-15 22:17:59 -04:00

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<?php
namespace Psalm\Tests;
use Psalm\Context;
use Psalm\Exception\CodeException;
use Psalm\Internal\Analyzer\IssueData;
use Psalm\IssueBuffer;
use function array_map;
use function preg_quote;
use function strpos;
use function trim;
use const DIRECTORY_SEPARATOR;
class TaintTest extends TestCase
{
/**
* @dataProvider providerValidCodeParse
*/
public function testValidCode(string $code): void
{
$test_name = $this->getTestName();
if (strpos($test_name, 'SKIPPED-') !== false) {
$this->markTestSkipped('Skipped due to a bug.');
}
$file_path = self::$src_dir_path . 'somefile.php';
$this->addFile(
$file_path,
$code
);
$this->project_analyzer->trackTaintedInputs();
$this->project_analyzer->getCodebase()->config->initializePlugins($this->project_analyzer);
$this->analyzeFile($file_path, new Context(), false);
}
/**
* @dataProvider providerInvalidCodeParse
*/
public function testInvalidCode(string $code, string $error_message): void
{
if (strpos($this->getTestName(), 'SKIPPED-') !== false) {
$this->markTestSkipped();
}
$this->expectException(CodeException::class);
$this->expectExceptionMessageMatches('/\b' . preg_quote($error_message, '/') . '\b/');
$file_path = self::$src_dir_path . 'somefile.php';
$this->addFile(
$file_path,
$code
);
$this->project_analyzer->trackTaintedInputs();
$this->analyzeFile($file_path, new Context(), false);
}
/**
* @return array<string, array{code:string}>
*/
public function providerValidCodeParse(): array
{
return [
'taintedInputInCreatedArrayNotEchoed' => [
'code' => '<?php
$name = $_GET["name"] ?? "unknown";
$id = (int) $_GET["id"];
$data = ["name" => $name, "id" => $id];
echo "<h1>" . htmlentities($data["name"], \ENT_QUOTES) . "</h1>";
echo "<p>" . $data["id"] . "</p>";'
],
'taintedInputInAssignedArrayNotEchoed' => [
'code' => '<?php
$name = $_GET["name"] ?? "unknown";
$id = (int) $_GET["id"];
$data = [];
$data["name"] = $name;
$data["id"] = $id;
echo "<h1>" . htmlentities($data["name"], \ENT_QUOTES) . "</h1>";
echo "<p>" . $data["id"] . "</p>";'
],
'taintedInputDirectlySuppressed' => [
'code' => '<?php
class A {
public function deleteUser(PDO $pdo) : void {
/** @psalm-taint-escape sql */
$userId = (string) $_GET["user_id"];
$pdo->exec("delete from users where user_id = " . $userId);
}
}'
],
'taintedInputDirectlySuppressedWithOtherUse' => [
'code' => '<?php
class A {
public function deleteUser(PDOWrapper $pdo) : void {
/**
* @psalm-taint-escape sql
*/
$userId = (string) $_GET["user_id"];
$pdo->exec("delete from users where user_id = " . $userId);
}
public function deleteUserSafer(PDOWrapper $pdo) : void {
$userId = $this->getSafeId();
$pdo->exec("delete from users where user_id = " . $userId);
}
public function getSafeId() : string {
return "5";
}
}
class PDOWrapper {
/**
* @psalm-taint-sink sql $sql
*/
public function exec(string $sql) : void {}
}'
],
'taintedInputToParamButSafe' => [
'code' => '<?php
class A {
public function getUserId(PDO $pdo) : void {
$this->deleteUser(
$pdo,
$this->getAppendedUserId((string) $_GET["user_id"])
);
}
public function getAppendedUserId(string $user_id) : string {
return "aaa" . $user_id;
}
public function deleteUser(PDO $pdo, string $userId) : void {
$userId2 = strlen($userId);
$pdo->exec("delete from users where user_id = " . $userId2);
}
}'
],
'ValidatedInputFromParam' => [
'code' => '<?php
/**
* @psalm-assert-untainted $userId
*/
function validateUserId(string $userId) : void {
if (!is_numeric($userId)) {
throw new \Exception("bad");
}
}
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function doDelete(PDO $pdo) : void {
$userId = $this->getUserId();
validateUserId($userId);
$this->deleteUser($pdo, $userId);
}
public function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}'
],
'untaintedInputAfterIntCast' => [
'code' => '<?php
class A {
public function getUserId() : int {
return (int) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->getUserId();
}
public function deleteUser(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$pdo->exec("delete from users where user_id = " . $userId);
}
}'
],
'specializedCoreFunctionCall' => [
'code' => '<?php
$a = (string) ($data["user_id"] ?? "");
echo print_r([], true);
$b = print_r($a, true);'
],
'untaintedInputViaStaticFunctionWithSafePath' => [
'code' => '<?php
class Utils {
/**
* @psalm-pure
*/
public static function shorten(string $str) : string {
return $str;
}
}
class A {
public function foo() : void {
echo(htmlentities(Utils::shorten((string) $_GET["user_id"]), \ENT_QUOTES));
}
public function bar() : void {
echo(Utils::shorten("hello"));
}
}'
],
'taintHtmlEntities' => [
'code' => '<?php
function foo() : void {
$a = htmlentities((string) $_GET["bad"], \ENT_QUOTES);
echo $a;
}'
],
'taintFilterVarInt' => [
'code' => '<?php
echo filter_var($_GET["bad"], FILTER_VALIDATE_INT);
echo filter_var($_GET["bad"], FILTER_SANITIZE_NUMBER_INT);'
],
'taintFilterVarBoolean' => [
'code' => '<?php
echo filter_var($_GET["bad"], FILTER_VALIDATE_BOOLEAN);'
],
'taintFilterVarFloat' => [
'code' => '<?php
echo filter_var($_GET["bad"], FILTER_VALIDATE_FLOAT);
echo filter_var($_GET["bad"], FILTER_SANITIZE_NUMBER_FLOAT);'
],
'taintLdapEscape' => [
'code' => '<?php
$ds = ldap_connect(\'example.com\');
$dn = \'o=Psalm, c=US\';
$filter = ldap_escape($_GET[\'filter\']);
ldap_search($ds, $dn, $filter, []);'
],
'taintOnStrReplaceCallRemovedInFunction' => [
'code' => '<?php
class U {
/**
* @psalm-pure
* @psalm-taint-escape html
* @psalm-taint-escape has_quotes
*/
public static function shorten(string $s) : string {
return str_replace("foo", "bar", $s);
}
}
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
echo U::shorten($o->s);
}
}'
],
'taintOnPregReplaceCallRemovedInFunction' => [
'code' => '<?php
class U {
/**
* @psalm-pure
*/
public static function shorten(string $s) : string {
return preg_replace("/[^_a-z\/\.A-Z0-9]/", "bar", $s);
}
}
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
echo U::shorten($o->s);
}
}'
],
'taintOnStrReplaceCallRemovedInline' => [
'code' => '<?php
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
/**
* @psalm-taint-escape html
* @psalm-taint-escape has_quotes
*/
$a = str_replace("foo", "bar", $o->s);
echo $a;
}
}'
],
'NoTaintsOnSimilarPureCall' => [
'code' => '<?php
class U {
/** @psalm-pure */
public static function shorten(string $s) : string {
return substr($s, 0, 15);
}
/** @psalm-pure */
public static function escape(string $s) : string {
return htmlentities($s, \ENT_QUOTES);
}
}
class O1 {
public string $s;
public function __construct(string $s) {
$this->s = $s;
}
}
class O2 {
public string $t;
public function __construct() {
$this->t = (string) $_GET["FOO"];
}
}
class V1 {
public function foo() : void {
$o = new O1((string) $_GET["FOO"]);
echo U::escape(U::shorten($o->s));
}
}
class V2 {
public function foo(O2 $o) : void {
echo U::shorten(U::escape($o->t));
}
}'
],
'taintPropertyPassingObjectWithDifferentValue' => [
'code' => '<?phps
/** @psalm-immutable */
class User {
public string $id;
public $name = "Luke";
public function __construct(string $userId) {
$this->id = $userId;
}
}
class UserUpdater {
public static function doDelete(PDO $pdo, User $user) : void {
self::deleteUser($pdo, $user->name);
}
public static function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}
$userObj = new User((string) $_GET["user_id"]);
UserUpdater::doDelete(new PDO(), $userObj);'
],
'taintPropertyWithoutPassingObject' => [
'code' => '<?php
/** @psalm-taint-specialize */
class User {
public string $id;
public function __construct(string $userId) {
$this->id = $userId;
}
public function setId(string $userId) : void {
$this->id = $userId;
}
}
function echoId(User $u2) : void {
echo $u2->id;
}
$u = new User("5");
echoId($u);
$u->setId($_GET["user_id"]);',
],
'specializeStaticMethod' => [
'code' => '<?php
StringUtility::foo($_GET["c"]);
class StringUtility {
/**
* @psalm-taint-specialize
*/
public static function foo(string $str) : string
{
return $str;
}
/**
* @psalm-taint-specialize
*/
public static function slugify(string $url) : string {
return self::foo($url);
}
}
echo StringUtility::slugify("hello");'
],
'taintFreeNestedArray' => [
'code' => '<?php
$a = [];
$a[] = ["a" => $_GET["name"], "b" => "foo"];
foreach ($a as $m) {
echo $m["b"];
}'
],
'taintFreeNestedArrayWithOffsetAccessedExplicitly' => [
'code' => '<?php
$a = [];
$a[] = ["a" => $_GET["name"], "b" => "foo"];
echo $a[0]["b"];',
],
'intUntainted' => [
'code' => '<?php
$input = $_GET[\'input\'];
if (is_int($input)) {
echo "$input";
}',
],
'dontTaintSpecializedInstanceProperty' => [
'code' => '<?php
/** @psalm-taint-specialize */
class StringHolder {
public $x;
public function __construct(string $x) {
$this->x = $x;
}
}
$a = new StringHolder("a");
$b = new StringHolder($_GET["x"]);
echo $a->x;'
],
'dontTaintSpecializedCallsForAnonymousInstance' => [
'code' => '<?php
class StringRenderer {
/** @psalm-taint-specialize */
public function render(string $x) {
return $x;
}
}
$notEchoed = (new StringRenderer())->render($_GET["untrusted"]);
echo (new StringRenderer())->render("a");'
],
'dontTaintSpecializedCallsForStubMadeInstance' => [
'code' => '<?php
class StringRenderer {
/** @psalm-taint-specialize */
public function render(string $x) {
return $x;
}
}
/** @psalm-suppress InvalidReturnType */
function stub(): StringRenderer { }
$notEchoed = stub()->render($_GET["untrusted"]);
echo stub()->render("a");'
],
'suppressTaintedInput' => [
'code' => '<?php
function unsafe() {
/**
* @psalm-suppress TaintedInput
*/
echo $_GET["x"];
}'
],
'suppressTaintedAssignment' => [
'code' => '<?php
$b = $_GET["x"];
/**
* @psalm-suppress TaintedInput
*/
$a = $b;
echo $a;'
],
'dontPropagateTaintToChildConstructor' => [
'code' => '<?php
class A {
public function __construct(string $a) {}
}
class B extends A {
public function __construct(string $a) {
echo $a;
}
}
new A($_GET["foo"]);'
],
'dontTaintThroughChildConstructorWhenMethodOverridden' => [
'code' => '<?php //--taint-analysis
class A {
private $taint;
public function __construct($taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {
public function __construct($taint) {}
}
$b = new B($_GET["bar"]);
echo $b->getTaint();'
],
'immutableClassTrackInputThroughMethod' => [
'code' => '<?php
/**
* @psalm-immutable
*/
class A {
private string $taint = "";
public function __construct(string $taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
$b = new A($_GET["bar"]);
$a = new A("bar");
echo $a->getTaint();',
],
'literalStringCannotCarryTaint' => [
'code' => '<?php
$file = $_GET["foo"];
if ($file !== "") {
/**
* @psalm-taint-escape input
*/
$file = basename($file);
}
echo $file;'
],
'strTrNotTainted' => [
'code' => '<?php
$input = strtr(\'data\', \'data\', \'data\');
setcookie($input, \'value\');',
],
'conditionallyEscapedTaintPassedTrue' => [
'code' => '<?php
/**
* @psalm-taint-escape ($escape is true ? "html" : null)
*/
function foo(string $string, bool $escape = true): string {
if ($escape) {
$string = htmlspecialchars($string);
}
return $string;
}
echo foo($_GET["foo"], true);
echo foo($_GET["foo"]);'
],
'NoTaintForInt' => [
'code' => '<?php // --taint-analysis
function foo(int $value): void {
echo $value;
}
foo($_GET["foo"]);
function bar(): int {
return $_GET["foo"];
}
echo bar();'
],
'conditionallyEscapedTaintPassedTrueStaticCall' => [
'code' => '<?php
class U {
/**
* @psalm-taint-escape ($escape is true ? "html" : null)
*/
public static function foo(string $string, bool $escape = true): string {
if ($escape) {
$string = htmlspecialchars($string);
}
return $string;
}
}
echo U::foo($_GET["foo"], true);
echo U::foo($_GET["foo"]);'
],
'keysAreNotTainted' => [
'code' => '<?php
function takesArray(array $arr): void {
foreach ($arr as $key => $_) {
echo $key;
}
}
takesArray(["good" => $_GET["bad"]]);'
],
'resultOfComparisonIsNotTainted' => [
'code' => '<?php
$input = $_GET["foo"];
$var = $input === "x";
var_dump($var);'
],
'resultOfPlusIsNotTainted' => [
'code' => '<?php
$input = $_GET["foo"];
$var = $input + 1;
var_dump($var);'
],
'NoTaintForIntTypeHintUsingAnnotatedSink' => [
'code' => '<?php // --taint-analysis
function fetch(int $id): string
{
return query("SELECT * FROM table WHERE id=" . $id);
}
/**
* @return string
* @psalm-taint-sink sql $sql
* @psalm-taint-specialize
*/
function query(string $sql) {}
$value = $_GET["value"];
$result = fetch($value);'
],
'NoTaintForIntTypeCastUsingAnnotatedSink' => [
'code' => '<?php // --taint-analysis
function fetch($id): string
{
return query("SELECT * FROM table WHERE id=" . (int)$id);
}
/**
* @return string
* @psalm-taint-sink sql $sql
* @psalm-taint-specialize
*/
function query(string $sql) {}
$value = $_GET["value"];
$result = fetch($value);'
],
'dontTaintArrayWithDifferentOffsetUpdated' => [
'code' => '<?php
function foo() {
$foo = [
"a" => [["c" => "hello"]],
"b" => [],
];
$foo["b"][] = [
"c" => $_GET["bad"],
];
bar($foo["a"]);
}
function bar(array $arr): void {
foreach ($arr as $s) {
echo $s["c"];
}
}'
],
];
}
/**
* @return array<string, array{code: string, error_message: string}>
*/
public function providerInvalidCodeParse(): array
{
return [
'taintedInputFromMethodReturnTypeSimple' => [
'code' => '<?php
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->getUserId();
}
public function deleteUser(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputFromFunctionReturnType' => [
'code' => '<?php
function getName() : string {
return $_GET["name"] ?? "unknown";
}
echo getName();',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:6:26 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:3:32) -> coalesce (src' . DIRECTORY_SEPARATOR . 'somefile.php:3:32) -> getName (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:42) -> call to echo (src' . DIRECTORY_SEPARATOR . 'somefile.php:6:26) -> echo#1',
],
'taintedInputFromExplicitTaintSource' => [
'code' => '<?php
/**
* @psalm-taint-source input
*/
function getName() : string {
return "";
}
echo getName();',
'error_message' => 'TaintedHtml',
],
'taintedInputFromExplicitTaintSourceStaticMethod' => [
'code' => '<?php
class Request {
/**
* @psalm-taint-source input
*/
public static function getName() : string {
return "";
}
}
echo Request::getName();',
'error_message' => 'TaintedHtml',
],
'taintedInputFromGetArray' => [
'code' => '<?php
function getName(array $data) : string {
return $data["name"] ?? "unknown";
}
$name = getName($_GET);
echo $name;',
'error_message' => 'TaintedHtml',
],
'taintedInputFromReturnToInclude' => [
'code' => '<?php
$a = (string) $_GET["file"];
$b = "hello" . $a;
include str_replace("a", "b", $b);',
'error_message' => 'TaintedInclude',
],
'taintedInputFromReturnToEval' => [
'code' => '<?php
$a = $_GET["file"];
eval("<?php" . $a);',
'error_message' => 'TaintedEval',
],
'taintedInputFromReturnTypeToEcho' => [
'code' => '<?php
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->getUserId();
}
public function deleteUser(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
echo $userId;
}
}',
'error_message' => 'TaintedHtml',
],
'taintedInputInCreatedArrayIsEchoed' => [
'code' => '<?php
$name = $_GET["name"] ?? "unknown";
$data = ["name" => $name];
echo "<h1>" . $data["name"] . "</h1>";',
'error_message' => 'TaintedHtml',
],
'testTaintedInputInAssignedArrayIsEchoed' => [
'code' => '<?php
$name = $_GET["name"] ?? "unknown";
$data = [];
$data["name"] = $name;
echo "<h1>" . $data["name"] . "</h1>";',
'error_message' => 'TaintedHtml',
],
'taintedInputDirectly' => [
'code' => '<?php
class A {
public function deleteUser(PDO $pdo) : void {
$userId = (string) $_GET["user_id"];
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputFromReturnTypeWithBranch' => [
'code' => '<?php
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
$userId = $this->getUserId();
if (rand(0, 1)) {
$userId .= "aaa";
} else {
$userId .= "bb";
}
return $userId;
}
public function deleteUser(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'sinkAnnotation' => [
'code' => '<?php
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->getUserId();
}
public function deleteUser(PDOWrapper $pdo) : void {
$userId = $this->getAppendedUserId();
$pdo->exec("delete from users where user_id = " . $userId);
}
}
class PDOWrapper {
/**
* @psalm-taint-sink sql $sql
*/
public function exec(string $sql) : void {}
}',
'error_message' => 'TaintedSql',
],
'taintedInputFromParam' => [
'code' => '<?php
class A {
public function getUserId() : string {
return (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->getUserId();
}
public function doDelete(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$this->deleteUser($pdo, $userId);
}
public function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql - src' . DIRECTORY_SEPARATOR . 'somefile.php:17:40 - Detected tainted SQL in path: $_GET -> $_GET[\'user_id\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:4:45) -> A::getUserId (src' . DIRECTORY_SEPARATOR . 'somefile.php:3:55) -> concat (src' . DIRECTORY_SEPARATOR . 'somefile.php:8:36) -> A::getAppendedUserId (src' . DIRECTORY_SEPARATOR . 'somefile.php:7:63) -> $userId (src' . DIRECTORY_SEPARATOR . 'somefile.php:12:29) -> call to A::deleteUser (src' . DIRECTORY_SEPARATOR . 'somefile.php:13:53) -> $userId (src' . DIRECTORY_SEPARATOR . 'somefile.php:16:69) -> call to PDO::exec (src' . DIRECTORY_SEPARATOR . 'somefile.php:17:40) -> PDO::exec#1',
],
'taintedInputToParam' => [
'code' => '<?php
class A {
public function getUserId(PDO $pdo) : void {
$this->deleteUser(
$pdo,
$this->getAppendedUserId((string) $_GET["user_id"])
);
}
public function getAppendedUserId(string $user_id) : string {
return "aaa" . $user_id;
}
public function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputToParamAfterAssignment' => [
'code' => '<?php
class A {
public function getUserId(PDO $pdo) : void {
$this->deleteUser(
$pdo,
$this->getAppendedUserId((string) $_GET["user_id"])
);
}
public function getAppendedUserId(string $user_id) : string {
return "aaa" . $user_id;
}
public function deleteUser(PDO $pdo, string $userId) : void {
$userId2 = $userId;
$pdo->exec("delete from users where user_id = " . $userId2);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputToParamAlternatePath' => [
'code' => '<?php
class A {
public function getUserId(PDO $pdo) : void {
$this->deleteUser(
$pdo,
self::doFoo(),
$this->getAppendedUserId((string) $_GET["user_id"])
);
}
public function getAppendedUserId(string $user_id) : string {
return "aaa" . $user_id;
}
public static function doFoo() : string {
return "hello";
}
public function deleteUser(PDO $pdo, string $userId, string $userId2) : void {
$pdo->exec("delete from users where user_id = " . $userId);
if (rand(0, 1)) {
$pdo->exec("delete from users where user_id = " . $userId2);
}
}
}',
'error_message' => 'TaintedSql - src' . DIRECTORY_SEPARATOR . 'somefile.php:23:44 - Detected tainted SQL in path: $_GET -> $_GET[\'user_id\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:7:67) -> call to A::getAppendedUserId (src' . DIRECTORY_SEPARATOR . 'somefile.php:7:58) -> $user_id (src' . DIRECTORY_SEPARATOR . 'somefile.php:11:66) -> concat (src' . DIRECTORY_SEPARATOR . 'somefile.php:12:36) -> A::getAppendedUserId (src' . DIRECTORY_SEPARATOR . 'somefile.php:11:78) -> call to A::deleteUser (src' . DIRECTORY_SEPARATOR . 'somefile.php:7:33) -> $userId2 (src' . DIRECTORY_SEPARATOR . 'somefile.php:19:85) -> call to PDO::exec (src' . DIRECTORY_SEPARATOR . 'somefile.php:23:44) -> PDO::exec#1',
],
'taintedInParentLoader' => [
'code' => '<?php
abstract class A {
abstract public static function loadPartial(string $sink) : void;
public static function loadFull(string $sink) : void {
static::loadPartial($sink);
}
}
function getPdo() : PDO {
return new PDO("connectionstring");
}
class AChild extends A {
public static function loadPartial(string $sink) : void {
getPdo()->exec("select * from foo where bar = " . $sink);
}
}
class AGrandChild extends AChild {}
class C {
public function foo(string $user_id) : void {
AGrandChild::loadFull($user_id);
}
}
(new C)->foo((string) $_GET["user_id"]);',
'error_message' => 'TaintedSql - src' . DIRECTORY_SEPARATOR . 'somefile.php:16:44 - Detected tainted SQL in path: $_GET -> $_GET[\'user_id\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:28:43) -> call to C::foo (src' . DIRECTORY_SEPARATOR . 'somefile.php:28:34) -> $user_id (src' . DIRECTORY_SEPARATOR . 'somefile.php:23:52) -> call to AGrandChild::loadFull (src' . DIRECTORY_SEPARATOR . 'somefile.php:24:51) -> AGrandChild::loadFull#1 (src' . DIRECTORY_SEPARATOR . 'somefile.php:5:64) -> A::loadFull#1 (src' . DIRECTORY_SEPARATOR . 'somefile.php:24:51) -> $sink (src' . DIRECTORY_SEPARATOR . 'somefile.php:5:64) -> call to A::loadPartial (src' . DIRECTORY_SEPARATOR . 'somefile.php:6:49) -> A::loadPartial#1 (src' . DIRECTORY_SEPARATOR . 'somefile.php:3:76) -> AChild::loadPartial#1 (src' . DIRECTORY_SEPARATOR . 'somefile.php:6:49) -> $sink (src' . DIRECTORY_SEPARATOR . 'somefile.php:15:67) -> call to PDO::exec (src' . DIRECTORY_SEPARATOR . 'somefile.php:16:44) -> PDO::exec#1',
],
'taintedInputFromProperty' => [
'code' => '<?php
class A {
public string $userId;
public function __construct() {
$this->userId = (string) $_GET["user_id"];
}
public function getAppendedUserId() : string {
return "aaaa" . $this->userId;
}
public function doDelete(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$this->deleteUser($pdo, $userId);
}
public function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputFromPropertyViaMixin' => [
'code' => '<?php
class A {
public string $userId;
public function __construct() {
$this->userId = (string) $_GET["user_id"];
}
}
/** @mixin A */
class B {
private A $a;
public function __construct(A $a) {
$this->a = $a;
}
public function __get(string $name) {
return $this->a->$name;
}
}
class C {
private B $b;
public function __construct(B $b) {
$this->b = $b;
}
public function getAppendedUserId() : string {
return "aaaa" . $this->b->userId;
}
public function doDelete(PDO $pdo) : void {
$userId = $this->getAppendedUserId();
$this->deleteUser($pdo, $userId);
}
public function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}',
'error_message' => 'TaintedSql',
],
'taintedInputViaStaticFunction' => [
'code' => '<?php
class Utils {
public static function shorten(string $str) : string {
return $str;
}
}
class A {
public function foo() : void {
echo(Utils::shorten((string) $_GET["user_id"]));
}
}',
'error_message' => 'TaintedHtml',
],
'taintedInputViaPureStaticFunction' => [
'code' => '<?php
class Utils {
/**
* @psalm-pure
*/
public static function shorten(string $str) : string {
return substr($str, 0, 100);
}
}
class A {
public function foo() : void {
echo(Utils::shorten((string) $_GET["user_id"]));
}
}',
'error_message' => 'TaintedHtml',
],
'untaintedInputViaStaticFunctionWithoutSafePath' => [
'code' => '<?php
class Utils {
/**
* @psalm-pure
*/
public static function shorten(string $str) : string {
return $str;
}
}
class A {
public function foo() : void {
echo(Utils::shorten((string) $_GET["user_id"]));
}
public function bar() : void {
echo(Utils::shorten("hello"));
}
}',
'error_message' => 'TaintedHtml',
],
'taintedInputFromMagicProperty' => [
'code' => '<?php
/**
* @property string $userId
*/
class A {
/** @var array<string, string> */
private $vars = [];
public function __get(string $s) : string {
return $this->vars[$s];
}
public function __set(string $s, string $t) {
$this->vars[$s] = $t;
}
}
function getAppendedUserId() : void {
$a = new A();
$a->userId = (string) $_GET["user_id"];
echo $a->userId;
}',
'error_message' => 'TaintedHtml',
],
'taintOverMixed' => [
'code' => '<?php
/**
* @psalm-suppress MixedAssignment
* @psalm-suppress MixedArgument
*/
function foo() : void {
$a = $_GET["bad"];
echo $a;
}',
'error_message' => 'TaintedHtml',
],
'taintStrConversion' => [
'code' => '<?php
function foo() : void {
$a = strtoupper(strtolower((string) $_GET["bad"]));
echo $a;
}',
'error_message' => 'TaintedHtml',
],
'taintIntoExec' => [
'code' => '<?php
function foo() : void {
$a = (string) $_GET["bad"];
exec($a);
}',
'error_message' => 'TaintedShell',
],
'taintIntoExecMultipleConcat' => [
'code' => '<?php
function foo() : void {
$a = "9" . "a" . "b" . "c" . ((string) $_GET["bad"]) . "d" . "e" . "f";
exec($a);
}',
'error_message' => 'TaintedShell',
],
'taintIntoNestedArrayUnnestedSeparately' => [
'code' => '<?php
function foo() : void {
$a = [[(string) $_GET["bad"]]];
exec($a[0][0]);
}',
'error_message' => 'TaintedShell',
],
'taintIntoArrayAndThenOutAgain' => [
'code' => '<?php
class C {
public static function foo() : array {
$a = (string) $_GET["bad"];
return [$a];
}
public static function bar() {
exec(self::foo()[0]);
}
}',
'error_message' => 'TaintedShell',
],
'taintAppendedToArray' => [
'code' => '<?php
class C {
public static function foo() : array {
$a = [];
$a[] = (string) $_GET["bad"];
return $a;
}
public static function bar() {
exec(self::foo()[0]);
}
}',
'error_message' => 'TaintedShell',
],
'taintOnSubstrCall' => [
'code' => '<?php
class U {
/** @psalm-pure */
public static function shorten(string $s) : string {
return substr($s, 0, 15);
}
}
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
echo U::shorten($o->s);
}
}',
'error_message' => 'TaintedHtml',
],
'taintOnStrReplaceCallSimple' => [
'code' => '<?php
class U {
/** @psalm-pure */
public static function shorten(string $s) : string {
return str_replace("foo", "bar", $s);
}
}
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
echo U::shorten($o->s);
}
}',
'error_message' => 'TaintedHtml',
],
'taintOnPregReplaceCall' => [
'code' => '<?php
class U {
/** @psalm-pure */
public static function shorten(string $s) : string {
return preg_replace("/foo/", "bar", $s);
}
}
class V {}
class O1 {
public string $s;
public function __construct() {
$this->s = (string) $_GET["FOO"];
}
}
class V1 extends V {
public function foo(O1 $o) : void {
echo U::shorten($o->s);
}
}',
'error_message' => 'TaintedHtml',
],
'IndirectGetAssignment' => [
'code' => '<?php
class InputFilter {
public string $name;
public function __construct(string $name) {
$this->name = $name;
}
/**
* @psalm-specialize-call
*/
public function getArg(string $method, string $type)
{
$arg = null;
switch ($method) {
case "post":
if (isset($_POST[$this->name])) {
$arg = $_POST[$this->name];
}
break;
case "get":
if (isset($_GET[$this->name])) {
$arg = $_GET[$this->name];
}
break;
}
return $this->filterInput($type, $arg);
}
protected function filterInput(string $type, $arg)
{
// input is null
if ($arg === null) {
return null;
}
// set to null if sanitize clears arg
if ($arg === "") {
$arg = null;
}
// type casting
if ($arg !== null) {
$arg = $this->typeCastInput($type, $arg);
}
return $arg;
}
protected function typeCastInput(string $type, $arg) {
if ($type === "string") {
return (string) $arg;
}
return null;
}
}
echo (new InputFilter("hello"))->getArg("get", "string");',
'error_message' => 'TaintedHtml',
],
'taintPropertyPassingObject' => [
'code' => '<?php
/** @psalm-immutable */
class User {
public string $id;
public function __construct(string $userId) {
$this->id = $userId;
}
}
class UserUpdater {
public static function doDelete(PDO $pdo, User $user) : void {
self::deleteUser($pdo, $user->id);
}
public static function deleteUser(PDO $pdo, string $userId) : void {
$pdo->exec("delete from users where user_id = " . $userId);
}
}
$userObj = new User((string) $_GET["user_id"]);
UserUpdater::doDelete(new PDO(), $userObj);',
'error_message' => 'TaintedSql',
],
'taintPropertyPassingObjectSettingValueLater' => [
'code' => '<?php
/** @psalm-taint-specialize */
class User {
public string $id;
public function __construct(string $userId) {
$this->id = $userId;
}
public function setId(string $userId) : void {
$this->id = $userId;
}
}
function echoId(User $u2) : void {
echo $u2->id;
}
$u = new User("5");
$u->setId($_GET["user_id"]);
echoId($u);',
'error_message' => 'TaintedHtml',
],
'ImplodeExplode' => [
'code' => '<?php
$a = $_GET["name"];
$b = explode(" ", $a);
$c = implode(" ", $b);
echo $c;',
'error_message' => 'TaintedHtml',
],
'ImplodeIndirect' => [
'code' => '<?php
/** @var array $unsafe */
$unsafe = $_GET[\'unsafe\'];
echo implode(" ", $unsafe);',
'error_message' => 'TaintedHtml',
],
'taintThroughPregReplaceCallback' => [
'code' => '<?php
$a = $_GET["bad"];
$b = preg_replace_callback(
\'/foo/\',
function (array $matches) : string {
return $matches[1];
},
$a
);
echo $b;',
'error_message' => 'TaintedHtml',
],
'taintedFunctionWithNoTypes' => [
'code' => '<?php
function rawinput() {
return $_GET[\'rawinput\'];
}
echo rawinput();',
'error_message' => 'TaintedHtml',
],
'taintedStaticCallWithNoTypes' => [
'code' => '<?php
class A {
public static function rawinput() {
return $_GET[\'rawinput\'];
}
}
echo A::rawinput();',
'error_message' => 'TaintedHtml',
],
'taintedInstanceCallWithNoTypes' => [
'code' => '<?php
class A {
public function rawinput() {
return $_GET[\'rawinput\'];
}
}
echo (new A())->rawinput();',
'error_message' => 'TaintedHtml',
],
'taintStringObtainedUsingStrval' => [
'code' => '<?php
$unsafe = strval($_GET[\'unsafe\']);
echo $unsafe',
'error_message' => 'TaintedHtml',
],
'taintStringObtainedUsingSprintf' => [
'code' => '<?php
$unsafe = sprintf("%s", strval($_GET[\'unsafe\']));
echo $unsafe;',
'error_message' => 'TaintedHtml',
],
'encapsulatedString' => [
'code' => '<?php
$unsafe = $_GET[\'unsafe\'];
echo "$unsafe";',
'error_message' => 'TaintedHtml',
],
'encapsulatedToStringMagic' => [
'code' => '<?php
class MyClass {
public function __toString() {
return $_GET["blah"];
}
}
$unsafe = new MyClass();
echo "unsafe: $unsafe";',
'error_message' => 'TaintedHtml',
],
'castToStringMagic' => [
'code' => '<?php
class MyClass {
public function __toString() {
return $_GET["blah"];
}
}
$unsafe = new MyClass();
echo $unsafe;',
'error_message' => 'TaintedHtml',
],
'castToStringViaArgument' => [
'code' => '<?php
class MyClass {
public function __toString() {
return $_GET["blah"];
}
}
function doesEcho(string $s) {
echo $s;
}
$unsafe = new MyClass();
doesEcho($unsafe);',
'error_message' => 'TaintedHtml',
],
'toStringTaintInSubclass' => [
'code' => '<?php // --taint-analysis
class TaintedBaseClass {
/** @psalm-taint-source input */
public function __toString() {
return "x";
}
}
class TaintedSubclass extends TaintedBaseClass {}
$x = new TaintedSubclass();
echo "Caught: $x\n";',
'error_message' => 'TaintedHtml',
],
'implicitToStringMagic' => [
'code' => '<?php
class MyClass {
public function __toString() {
return $_GET["blah"];
}
}
$unsafe = new MyClass();
echo $unsafe;',
'error_message' => 'TaintedHtml',
],
'namespacedFunction' => [
'code' => '<?php
namespace ns;
function identity(string $s) : string {
return $s;
}
echo identity($_GET[\'userinput\']);',
'error_message' => 'TaintedHtml',
],
'print' => [
'code' => '<?php
print($_GET["name"]);',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:2:27 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:27) -> call to print (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:27) -> print#1',
],
'printf' => [
'code' => '<?php
printf($_GET["name"]);',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:2:28 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:28) -> call to printf (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:28) -> printf#1',
],
'print_r' => [
'code' => '<?php
print_r($_GET["name"]);',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:2:29 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:29) -> call to print_r (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:29) -> print_r#1',
],
'var_dump' => [
'code' => '<?php
var_dump($_GET["name"]);',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:2:30 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:30) -> call to var_dump (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:30) -> var_dump#1',
],
'var_export' => [
'code' => '<?php
var_export($_GET["name"]);',
'error_message' => 'TaintedHtml - src' . DIRECTORY_SEPARATOR . 'somefile.php:2:32 - Detected tainted HTML in path: $_GET -> $_GET[\'name\'] (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:32) -> call to var_export (src' . DIRECTORY_SEPARATOR . 'somefile.php:2:32) -> var_export#1',
],
'unpackArgs' => [
'code' => '<?php
function test(...$args) {
echo $args[0];
}
test(...$_GET["other"]);',
'error_message' => 'TaintedHtml',
],
'foreachArg' => [
'code' => '<?php
$a = $_GET["bad"];
foreach ($a as $arg) {
echo $arg;
}',
'error_message' => 'TaintedHtml',
],
'magicPropertyType' => [
'code' => '<?php
class Magic {
private $params = [];
public function __get(string $a) {
return $this->params[$a];
}
public function __set(string $a, $value) {
$this->params[$a] = $value;
}
}
$m = new Magic();
$m->taint = $_GET["input"];
echo $m->taint;',
'error_message' => 'TaintedHtml',
],
'taintNestedArrayWithOffsetAccessedInForeach' => [
'code' => '<?php
$a = [];
$a[0] = ["a" => $_GET["name"], "b" => "foo"];
foreach ($a as $m) {
echo $m["a"];
}',
'error_message' => 'TaintedHtml',
],
'taintNestedArrayWithOffsetAccessedExplicitly' => [
'code' => '<?php
$a = [];
$a[] = ["a" => $_GET["name"], "b" => "foo"];
echo $a[0]["a"];',
'error_message' => 'TaintedHtml',
],
'taintThroughArrayMapExplicitClosure' => [
'code' => '<?php
$get = array_map(function($str) { return trim($str);}, $_GET);
echo $get["test"];',
'error_message' => 'TaintedHtml',
],
'taintThroughArrayMapExplicitTypedClosure' => [
'code' => '<?php
$get = array_map(function(string $str) : string { return trim($str);}, $_GET);
echo $get["test"];',
'error_message' => 'TaintedHtml',
],
'taintThroughArrayMapExplicitArrowFunction' => [
'code' => '<?php
$get = array_map(fn($str) => trim($str), $_GET);
echo $get["test"];',
'error_message' => 'TaintedHtml',
],
'taintThroughArrayMapImplicitFunctionCall' => [
'code' => '<?php
$a = ["test" => $_GET["name"]];
$get = array_map("trim", $a);
echo $get["test"];',
'error_message' => 'TaintedHtml',
],
'taintFilterVarCallback' => [
'code' => '<?php
$get = filter_var($_GET, FILTER_CALLBACK, ["options" => "trim"]);
echo $get["test"];',
'error_message' => 'TaintedHtml',
],
'taintAfterReconciledType' => [
'code' => '<?php
$input = $_GET[\'input\'];
if (is_string($input)) {
echo "$input";
}',
'error_message' => 'TaintedHtml',
],
'taintExit' => [
'code' => '<?php
if (rand(0, 1)) {
exit($_GET[\'a\']);
} else {
die($_GET[\'b\']);
}',
'error_message' => 'TaintedHtml',
],
'taintSpecializedMethod' => [
'code' => '<?php
/** @psalm-taint-specialize */
class Unsafe {
public function isUnsafe() {
return $_GET["unsafe"];
}
}
$a = new Unsafe();
echo $a->isUnsafe();',
'error_message' => 'TaintedHtml',
],
'taintSpecializedMethodForAnonymousInstance' => [
'code' => '<?php
/** @psalm-taint-specialize */
class Unsafe {
public function isUnsafe() {
return $_GET["unsafe"];
}
}
echo (new Unsafe())->isUnsafe();',
'error_message' => 'TaintedHtml',
],
'taintSpecializedMethodForStubMadeInstance' => [
'code' => '<?php
/** @psalm-taint-specialize */
class Unsafe {
public function isUnsafe() {
return $_GET["unsafe"];
}
}
/** @psalm-suppress InvalidReturnType */
function stub(): Unsafe { }
echo stub()->isUnsafe();',
'error_message' => 'TaintedHtml',
],
'doTaintSpecializedInstanceProperty' => [
'code' => '<?php
/** @psalm-taint-specialize */
class StringHolder {
public $x;
public function __construct(string $x) {
$this->x = $x;
}
}
$b = new StringHolder($_GET["x"]);
echo $b->x;',
'error_message' => 'TaintedHtml',
],
'taintUnserialize' => [
'code' => '<?php
$cb = unserialize($_POST[\'x\']);',
'error_message' => 'TaintedUnserialize',
],
'taintCreateFunction' => [
'code' => '<?php
$cb = create_function(\'$a\', $_GET[\'x\']);',
'error_message' => 'TaintedEval',
],
'taintException' => [
'code' => '<?php
$e = new Exception();
echo $e;',
'error_message' => 'TaintedHtml',
],
'taintError' => [
'code' => '<?php
function foo() {}
try {
foo();
} catch (TypeError $e) {
echo "Caught: {$e->getTraceAsString()}\n";
}',
'error_message' => 'TaintedHtml',
],
'taintThrowable' => [
'code' => '<?php
function foo() {}
try {
foo();
} catch (Throwable $e) {
echo "Caught: $e"; // TODO: ("Caught" . $e) does not work.
}',
'error_message' => 'TaintedHtml',
],
'taintReturnedArray' => [
'code' => '<?php
function processParams(array $params) : array {
if (isset($params["foo"])) {
return $params;
}
return [];
}
$params = processParams($_GET);
echo $params["foo"];',
'error_message' => 'TaintedHtml',
],
'taintFlow' => [
'code' => '<?php
/**
* @psalm-flow ($r) -> return
*/
function some_stub(string $r): string {}
$r = $_GET["untrusted"];
echo some_stub($r);',
'error_message' => 'TaintedHtml',
],
'taintFlowProxy' => [
'code' => '<?php
/**
* @psalm-taint-sink callable $in
*/
function dummy_taint_sink(string $in): void {}
/**
* @psalm-flow proxy dummy_taint_sink($r)
*/
function some_stub(string $r): string {}
$r = $_GET["untrusted"];
some_stub($r);',
'error_message' => 'TaintedCallable',
],
'taintFlowProxyAndReturn' => [
'code' => '<?php
function dummy_taintable(string $in): string {
return $in;
}
/**
* @psalm-flow proxy dummy_taintable($r) -> return
*/
function some_stub(string $r): string {}
$r = $_GET["untrusted"];
echo some_stub($r);',
'error_message' => 'TaintedHtml',
],
'taintFlowMethodProxyAndReturn' => [
'code' => '<?php
class dummy {
public function taintable(string $in): string {
return $in;
}
}
/**
* @psalm-flow proxy dummy::taintable($r) -> return
*/
function some_stub(string $r): string {}
$r = $_GET["untrusted"];
echo some_stub($r);',
'error_message' => 'TaintedHtml',
],
'taintPopen' => [
'code' => '<?php
$cb = popen($_POST[\'x\'], \'r\');',
'error_message' => 'TaintedShell',
],
'taintProcOpen' => [
'code' => '<?php
$arr = [];
$cb = proc_open($_POST[\'x\'], [], $arr);',
'error_message' => 'TaintedShell',
],
'taintedCurlInit' => [
'code' => '<?php
$ch = curl_init($_GET[\'url\']);',
'error_message' => 'TaintedSSRF',
],
'taintedCurlSetOpt' => [
'code' => '<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $_GET[\'url\']);',
'error_message' => 'TaintedSSRF',
],
'taintThroughChildConstructorWithoutMethodOverride' => [
'code' => '<?php //--taint-analysis
class A {
private $taint;
public function __construct($taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {}
$b = new B($_GET["bar"]);
echo $b->getTaint();',
'error_message' => 'TaintedHtml',
],
'taintThroughChildConstructorCallingParentMethod' => [
'code' => '<?php //--taint-analysis
class A {
private $taint;
public function __construct($taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {}
class C extends B {}
$c = new C($_GET["bar"]);
function foo(B $b) {
echo $b->getTaint();
}',
'error_message' => 'TaintedHtml',
],
'taintThroughChildConstructorCallingGrandParentMethod' => [
'code' => '<?php //--taint-analysis
class A {
private $taint;
public function __construct($taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {}
class C extends B {}
$c = new C($_GET["bar"]);
function foo(A $a) {
echo $a->getTaint();
}',
'error_message' => 'TaintedHtml',
],
'taintThroughChildConstructorWhenMethodOverriddenWithParentConstructorCall' => [
'code' => '<?php //--taint-analysis
class A {
private $taint;
public function __construct($taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {
public function __construct($taint) {
parent::__construct($taint);
}
}
$b = new B($_GET["bar"]);
echo $b->getTaint();',
'error_message' => 'TaintedHtml',
],
'taintedLdapSearch' => [
'code' => '<?php
$ds = ldap_connect(\'example.com\');
$dn = \'o=Psalm, c=US\';
$filter = $_GET[\'filter\'];
ldap_search($ds, $dn, $filter, []);',
'error_message' => 'TaintedLdap',
],
'taintedFile' => [
'code' => '<?php
file_get_contents($_GET[\'taint\']);',
'error_message' => 'TaintedFile',
],
'taintedHeader' => [
'code' => '<?php
header($_GET[\'taint\']);',
'error_message' => 'TaintedHeader',
],
'taintedCookie' => [
'code' => '<?php
setcookie($_GET[\'taint\'], \'value\');',
'error_message' => 'TaintedCookie',
],
'variadicTaintPropagation' => [
'code' => '<?php
/**
* @psalm-pure
*
* @param string|int|float $args
*
* @psalm-flow ($format, $args) -> return
*/
function variadic_test(string $format, ...$args) : string {
}
echo variadic_test(\'\', \'\', $_GET[\'taint\'], \'\');',
'error_message' => 'TaintedHtml'
],
'potentialTaintThroughChildClassSettingProperty' => [
'code' => '<?php
class A {
public string $taint = "";
public function getTaint() : string {
return $this->taint;
}
}
class B extends A {
public function __construct(string $taint) {
$this->taint = $taint;
}
}
$b = new B($_GET["bar"]);
echo $b->getTaint();',
'error_message' => 'TaintedHtml',
],
'immutableClassTrackInputThroughMethod' => [
'code' => '<?php
/**
* @psalm-immutable
*/
class A {
private string $taint = "";
public function __construct(string $taint) {
$this->taint = $taint;
}
public function getTaint() : string {
return $this->taint;
}
}
$a = new A($_GET["bar"]);
echo $a->getTaint();',
'error_message' => 'TaintedHtml',
],
'strTrReturnTypeTaint' => [
'code' => '<?php
$input = strtr(\'data\', $_GET[\'taint\'], \'data\');
setcookie($input, \'value\');',
'error_message' => 'TaintedCookie',
],
'conditionallyEscapedTaintPassedFalse' => [
'code' => '<?php
/**
* @psalm-taint-escape ($escape is true ? "html" : null)
*/
function foo(string $string, bool $escape = true): string {
if ($escape) {
$string = htmlspecialchars($string);
}
return $string;
}
echo foo($_GET["foo"], false);',
'error_message' => 'TaintedHtml',
],
'suppressOneCatchAnother' => [
'code' => '<?php
/** @psalm-taint-specialize */
function data(array $data, string $key) {
return $data[$key];
}
function get(string $key) {
return data($_GET, $key);
}
function post(string $key) {
return data($_POST, $key);
}
echo get("x");
/** @psalm-suppress TaintedInput */
echo post("x");',
'error_message' => 'TaintedHtml',
],
'taintSpecializedTwice' => [
'code' => '<?php
/** @psalm-taint-specialize */
function data(array $data, string $key) {
return $data[$key];
}
/** @psalm-taint-specialize */
function get(string $key) {
return data($_GET, $key);
}
echo get("x");',
'error_message' => 'TaintedHtml',
],
'conditionallyEscapedTaintsAll' => [
'code' => '<?php
/** @psalm-taint-escape ($type is "int" ? "html" : null) */
function cast(mixed $value, string $type): mixed
{
if ("int" === $type) {
return (int) $value;
}
return (string) $value;
}
/** @psalm-taint-specialize */
function data(array $data, string $key, string $type) {
return cast($data[$key], $type);
}
// technically a false-positive, but desired behaviour in lieu
// of better information
echo data($_GET, "x", "int");',
'error_message' => 'TaintedHtml',
],
'psalmFlowOnInstanceMethod' => [
'code' => '<?php //--taint-analysis
class Wdb {
/**
* @psalm-pure
*
* @param string $text
* @return string
* @psalm-flow ($text) -> return
*/
public function esc_like($text) {}
/**
* @param string $query
* @return int|bool
*
* @psalm-taint-sink sql $query
*/
public function query($query){}
}
$wdb = new Wdb();
$order = $wdb->esc_like($_GET["order"]);
$res = $wdb->query("SELECT blah FROM tablea ORDER BY ". $order. " DESC");',
'error_message' => 'TaintedSql',
],
'psalmFlowOnStaticMethod' => [
'code' => '<?php //--taint-analysis
class Wdb {
/**
* @psalm-pure
*
* @param string $text
* @return string
* @psalm-flow ($text) -> return
*/
public static function esc_like($text) {}
/**
* @param string $query
* @return int|bool
*
* @psalm-taint-sink sql $query
*/
public static function query($query){}
}
$order = Wdb::esc_like($_GET["order"]);
$res = Wdb::query("SELECT blah FROM tablea ORDER BY ". $order. " DESC");',
'error_message' => 'TaintedSql',
],
'keysAreTainted' => [
'code' => '<?php
function takesArray(array $arr): void {
foreach ($arr as $key => $_) {
echo $key;
}
}
takesArray([$_GET["bad"] => "good"]);',
'error_message' => 'TaintedHtml',
],
'resultOfPlusIsTaintedOnArrays' => [
'code' => '<?php
scope($_GET["foo"]);
function scope(array $foo)
{
$var = $foo + [];
var_dump($var);
}',
'error_message' => 'TaintedHtml',
],
'taintArrayKeyWithExplicitSink' => [
'code' => '<?php
/** @psalm-taint-sink html $values */
function doTheMagic(array $values) {}
doTheMagic([(string)$_GET["bad"] => "foo"]);',
'error_message' => 'TaintedHtml',
],
'taintThroughReset' => [
'code' => '<?php
function foo(array $arr) : void {
if ($arr) {
echo reset($arr);
}
}
foo([$_GET["a"]]);',
'error_message' => 'TaintedHtml',
],
'shellExecBacktick' => [
'code' => '<?php
$input = $_GET["input"];
$x = `$input`;
',
'error_message' => 'TaintedShell',
],
/*
// TODO: Stubs do not support this type of inference even with $this->message = $message.
// Most uses of getMessage() would be with caught exceptions, so this is not representative of real code.
'taintException' => [
'<?php
$x = new Exception($_GET["x"]);
echo $x->getMessage();',
'error_message' => 'TaintedHtml',
],
*/
'castToArrayPassTaints' => [
'code' => '<?php
$args = $_POST;
$args = (array) $args;
pg_query($connection, "SELECT * FROM tableA where key = " .$args["key"]);
',
'error_message' => 'TaintedSql',
],
'taintSinkWithComments' => [
'code' => '<?php
/**
* @psalm-taint-sink html $sink
*
* Not working
*/
function sinkNotWorking($sink) : string {}
echo sinkNotWorking($_GET["taint"]);',
'error_message' => 'TaintedHtml',
],
'taintEscapedInTryMightNotWork' => [
'code' => '<?php
/** @psalm-taint-escape html */
function escapeHtml(string $arg): string
{
return htmlspecialchars($arg);
}
$tainted = $_GET["foo"];
try {
$tainted = escapeHtml($tainted);
} catch (Throwable $_) {
}
echo $tainted;
',
'error_message' => 'TaintedHtml',
],
'taintArrayWithOffsetUpdated' => [
'code' => '<?php
function foo() {
$foo = [
"a" => [["c" => "hello"]],
"b" => [],
];
$foo["b"][] = [
"c" => $_GET["bad"],
];
bar($foo["b"]);
}
function bar(array $arr): void {
foreach ($arr as $s) {
echo $s["c"];
}
}',
'error_message' => 'TaintedHtml',
],
'checkMemoizedStaticMethodCallTaints' => [
'code' => '<?php
class A {
private static string $prev = "";
public static function getPrevious(string $s): string {
$prev = self::$prev;
self::$prev = $s;
return $prev;
}
}
A::getPrevious($_GET["a"]);
echo A::getPrevious("foo");',
'error_message' => 'TaintedHtml',
],
'taintedNewCall' => [
'code' => '<?php
$a = $_GET["a"];
$b = $_GET["b"];
new $a($b);',
'error_message' => 'TaintedCallable',
],
];
}
/**
* @param string $code
* @param list<string> $expectedIssuesTypes
* @test
* @dataProvider multipleTaintIssuesAreDetectedDataProvider
*/
public function multipleTaintIssuesAreDetected(string $code, array $expectedIssuesTypes): void
{
if (strpos($this->getTestName(), 'SKIPPED-') !== false) {
$this->markTestSkipped();
}
// disables issue exceptions - we need all, not just the first
$this->testConfig->throw_exception = false;
$filePath = self::$src_dir_path . 'somefile.php';
$this->addFile($filePath, $code);
$this->project_analyzer->trackTaintedInputs();
$this->analyzeFile($filePath, new Context(), false);
$actualIssueTypes = array_map(
fn(IssueData $issue): string => $issue->type . '{ ' . trim($issue->snippet) . ' }',
IssueBuffer::getIssuesDataForFile($filePath)
);
self::assertSame($expectedIssuesTypes, $actualIssueTypes);
}
/**
* @return array<string, array{code: string, expectedIssueTypes: list<string>}>
*/
public function multipleTaintIssuesAreDetectedDataProvider(): array
{
return [
'taintSinkFlow' => [
'code' => '<?php
/**
* @param string $value
* @return string
*
* @psalm-flow ($value) -> return
* @psalm-taint-sink html $value
*/
function process(string $value): string {}
$data = process((string)($_GET["inject"] ?? ""));
exec($data);
',
'expectedIssueTypes' => [
'TaintedHtml{ function process(string $value): string {} }',
'TaintedShell{ exec($data); }',
],
],
'taintSinkCascade' => [
'code' => '<?php
function triggerHtml(string $value): string
{
echo $value;
return $value;
}
function triggerShell(string $value): string
{
exec($value);
return $value;
}
function triggerFile(string $value): string
{
file_get_contents($value);
return $value;
}
$value = (string)($_GET["inject"] ?? "");
$value = triggerHtml($value);
$value = triggerShell($value);
$value = triggerFile($value);
',
'expectedIssueTypes' => [
'TaintedHtml{ echo $value; }',
'TaintedTextWithQuotes{ echo $value; }',
'TaintedShell{ exec($value); }',
'TaintedFile{ file_get_contents($value); }',
],
],
'taintedIncludes' => [
'code' => '<?php
$first = (string)($_GET["first"] ?? "");
$second = (string)($_GET["second"] ?? "");
require $first;
require dirname(__DIR__)."/first.php";
require $second;
require dirname(__DIR__)."/second.php";
',
'expectedIssueTypes' => [
'TaintedInclude{ require $first; }',
'TaintedInclude{ require $second; }',
],
],
];
}
}
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