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fix: CSRF flow ships the raw token, not the HMAC cookie

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This commit is contained in:
Keith Solomon
2026-07-26 11:01:36 -05:00
parent 73254cbf80
commit 2ea8cfd83d
13 changed files with 60 additions and 28 deletions
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public/index.php
+22 -1
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@@ -44,9 +44,15 @@ if ($secret === false || $secret === '') {
}
// 2. Ensure the __csrf cookie is set. If absent, issue a fresh token.
// The double-submit pattern stores the raw token in a separate readable
// cookie so client code (meta tag, JS) can echo it back as the
// X-CSRF-Token header. The HMAC cookie is the verification oracle;
// the raw-token cookie rides parallel and is readable by document.cookie
// or the equivalent server-side read.
$cookies = $_COOKIE;
$existingCookie = (string) ($cookies['__csrf'] ?? '');
if ($existingCookie === '') {
$existingRawToken = (string) ($cookies['__csrf_token'] ?? '');
if ($existingCookie === '' || $existingRawToken === '') {
[$token, $cookie] = CsrfToken::issue($secret);
setcookie('__csrf', $cookie, [
'expires' => time() + 86400,
@@ -55,8 +61,23 @@ if ($existingCookie === '') {
'httponly' => true,
'samesite' => 'Lax',
]);
// The raw token rides in a readable cookie so server-side templates
// can echo it into the <meta name="csrf-token"> tag without keeping
// the raw token in `index.php` per-request state. HttpOnly off so the
// server can read it via the request cookie jar; security comes from
// the HMAC verification, not from hiding the raw token (which the
// browser would already see in the meta tag anyway).
setcookie('__csrf_token', $token, [
'expires' => time() + 86400,
'path' => '/',
'secure' => isset($_SERVER['HTTPS']),
'httponly' => false,
'samesite' => 'Lax',
]);
$existingCookie = $cookie;
$existingRawToken = $token;
$cookies['__csrf'] = $cookie;
$cookies['__csrf_token'] = $token;
}
// 3. Compute the upload-endpoint user token (derived from the same secret).
src/Http/Handlers/GetBattlefieldEditor.php
+1 -1
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@@ -12,7 +12,7 @@ final class GetBattlefieldEditor
/** @param array<string, string> $params */
public function handle(Request $request, array $params): Response
{
$csrf = $request->cookies['__csrf'] ?? '';
$csrf = $request->cookies['__csrf_token'] ?? '';
$scenarioId = $params['id'] ?? 'new';
$width = 8;
$height = 8;
src/Http/Handlers/GetHomePage.php
+1 -1
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@@ -16,7 +16,7 @@ final class GetHomePage
/** @param array<string, string> $params */
public function handle(Request $request, array $params): Response
{
$csrf = $request->cookies['__csrf'] ?? '';
$csrf = $request->cookies['__csrf_token'] ?? '';
$bundled = $this->loadBundledScenarios();
ob_start();
src/Http/Handlers/GetMatchView.php
+1 -1
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@@ -12,7 +12,7 @@ final class GetMatchView
/** @param array<string, string> $params */
public function handle(Request $request, array $params): Response
{
$csrf = $request->cookies['__csrf'] ?? '';
$csrf = $request->cookies['__csrf_token'] ?? '';
ob_start();
require_once __DIR__ . '/../../Views/layout.php';
src/Http/Handlers/GetTeamEditor.php
+1 -1
View File
@@ -12,7 +12,7 @@ final class GetTeamEditor
/** @param array<string, string> $params */
public function handle(Request $request, array $params): Response
{
$csrf = $request->cookies['__csrf'] ?? '';
$csrf = $request->cookies['__csrf_token'] ?? '';
$scenarioId = $params['id'] ?? 'new';
$error = null;
src/Http/Handlers/PostStartMatch.php
+10 -1
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@@ -27,8 +27,17 @@ final class PostStartMatch
try {
$payload = json_decode($request->rawBody, true, flags: JSON_THROW_ON_ERROR);
$draft = ScenarioDraft::fromPost($payload);
// Accept either the canonical `Scenario` shape (used by the bundled
// scenario endpoint at /scenarios/bundled/{id}, where the JS POSTs
// the JSON it fetched verbatim) or the editor's `ScenarioDraft`
// shape (the form's denormalized fields). The presence of a
// nested `battlefield` object distinguishes the two.
if (is_array($payload) && is_array($payload['battlefield'] ?? null)) {
$scenario = ScenarioSerializer::scenarioFromArray($payload);
} else {
$draft = ScenarioDraft::fromPost($payload ?? []);
$scenario = $draft->toScenario();
}
ScenarioValidator::validate($scenario);
$match = $scenario->startMatch('alpha');
} catch (\JsonException $exception) {
tests/Integration/FullFlowTest.php
+2
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@@ -37,6 +37,7 @@ final class FullFlowTest extends TestCase
// Step 2: POST team editor.
$_COOKIE['__csrf'] = $cookie;
$_COOKIE['__csrf_token'] = $token;
$_SERVER['REQUEST_METHOD'] = 'POST';
$_SERVER['REQUEST_URI'] = '/scenarios/demo/edit/team';
$_SERVER['CONTENT_TYPE'] = 'application/x-www-form-urlencoded';
@@ -104,6 +105,7 @@ final class FullFlowTest extends TestCase
try {
[$token, $cookie] = CsrfToken::issue(self::SECRET);
$_COOKIE['__csrf'] = $cookie;
$_COOKIE['__csrf_token'] = $token;
$_SERVER['REQUEST_METHOD'] = 'POST';
$_SERVER['REQUEST_URI'] = '/assets/upload';
$_SERVER['CONTENT_TYPE'] = 'multipart/form-data; boundary=----test';
tests/Integration/PostBattlefieldEditorTest.php
+2 -2
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@@ -30,7 +30,7 @@ final class PostBattlefieldEditorTest extends TestCase
$request = $this->buildRequest(
rawBody: json_encode($this->validBattlefield(), JSON_THROW_ON_ERROR),
csrfHeader: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
);
$response = $handler->handle($request, ['id' => 'demo']);
@@ -48,7 +48,7 @@ final class PostBattlefieldEditorTest extends TestCase
$request = $this->buildRequest(
rawBody: json_encode(['this' => 'is not a valid scenario'], JSON_THROW_ON_ERROR),
csrfHeader: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
);
$response = $handler->handle($request, ['id' => 'demo']);
tests/Integration/PostImageUploadTest.php
+2 -2
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@@ -52,7 +52,7 @@ final class PostImageUploadTest extends TestCase
get: [],
post: ['_csrf' => $token],
files: ['image' => ['name' => 'a.png', 'tmp_name' => $tmp, 'error' => 0, 'size' => 70, 'type' => 'image/png']],
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
queryString: '',
method: 'POST',
@@ -78,7 +78,7 @@ final class PostImageUploadTest extends TestCase
get: [],
post: ['_csrf' => $token],
files: ['image' => ['name' => 'a.png', 'tmp_name' => $tmp, 'error' => 0, 'size' => 12, 'type' => 'image/png']],
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
queryString: '',
method: 'POST',
tests/Integration/PostMatchActionTest.php
+9 -9
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@@ -36,7 +36,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -67,7 +67,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -100,7 +100,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -135,7 +135,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -175,7 +175,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -220,7 +220,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -247,7 +247,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -275,7 +275,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $stale,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
@@ -292,7 +292,7 @@ final class PostMatchActionTest extends TestCase
match: $match,
csrf: $csrf,
turnToken: $wrongRound,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
body: [
'matchId' => self::MATCH_ID,
'match' => ScenarioSerializer::matchToArray($match),
tests/Integration/PostStartMatchTest.php
+3 -3
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@@ -29,7 +29,7 @@ final class PostStartMatchTest extends TestCase
$request = $this->buildRequest(
rawBody: json_encode($this->validScenario(), JSON_THROW_ON_ERROR),
csrfHeader: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
);
$response = $handler->handle($request, ['id' => 'demo']);
@@ -51,7 +51,7 @@ final class PostStartMatchTest extends TestCase
$request = $this->buildRequest(
rawBody: json_encode(['this' => 'is not a valid scenario'], JSON_THROW_ON_ERROR),
csrfHeader: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
);
$response = $handler->handle($request, ['id' => 'demo']);
@@ -65,7 +65,7 @@ final class PostStartMatchTest extends TestCase
$request = $this->buildRequest(
rawBody: json_encode($this->validScenario(), JSON_THROW_ON_ERROR),
csrfHeader: $token,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
);
$response = $handler->handle($request, ['id' => 'demo']);
tests/Integration/PostTeamEditorTest.php
+3 -3
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@@ -39,7 +39,7 @@ final class PostTeamEditorTest extends TestCase
$handler = new PostTeamEditor();
$request = $this->buildRequest(
post: $this->validPost($token),
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
);
$response = $handler->handle($request, ['id' => 'demo']);
@@ -57,7 +57,7 @@ final class PostTeamEditorTest extends TestCase
$post['teamA']['units'][0]['maxHealth'] = '9999';
$request = $this->buildRequest(
post: $post,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
);
$response = $handler->handle($request, ['id' => 'demo']);
@@ -75,7 +75,7 @@ final class PostTeamEditorTest extends TestCase
$post['id'] = '</script><script>alert(1)</script>';
$request = $this->buildRequest(
post: $post,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
server: ['__csrf_secret' => self::SECRET],
);
$response = $handler->handle($request, ['id' => $post['id']]);
tests/Unit/Http/MatchActionSupportTest.php
+2 -2
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@@ -47,7 +47,7 @@ final class MatchActionSupportTest extends TestCase
match: $this->validMatchArray(),
csrf: $csrf,
turnToken: $badToken,
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
);
$result = $support->verify($request);
@@ -66,7 +66,7 @@ final class MatchActionSupportTest extends TestCase
match: ['this' => 'is not a match'],
csrf: $csrf,
turnToken: 'whatever',
cookies: ['__csrf' => $cookie],
cookies: ['__csrf' => $cookie, '__csrf_token' => $token],
);
$result = $support->verify($request);