security

$class = is_object($model) ? get_class($model) : (string)$model
$pk = (is_string($class) && class_exists($class) && property_exists($class, 'idColumn')) ? $class::$idColumn : 'id'
$id = is_object($model) ? ($model->$pk ?? $model->id ?? null) : null
if ($id === null) return
$before = (array)$before
$after = (array)$after
foreach ($exclude AS $col) unset($before[$col], $after[$col])
$changes = $action === 'update' ? static::diff($before, $after) : ($action === 'create' ? $after : $before)
$class::DB()->query(
	'INSERT INTO audit_log (ts, '.$class::DB()->quoteId('user').', model, record_id, action, changes, ip) VALUES (?, ?, ?, ?, ?, ?, ?)',
	time(),
	class_exists('session') && isset(%session->user) ? (int)%session->user : null,
	$class,
	(string)$id,
	$action,
	json_encode($changes, jsonFlat),
	(string)($_SERVER['REMOTE_ADDR'] ?? null),
)

$changed = []
foreach ($after AS $col => $newVal){
	$oldVal = $before[$col] ?? null
	if ($oldVal !== $newVal) $changed[$col] = ['from' => $oldVal, 'to' => $newVal]
}
return $changed

$class = is_object($model) ? get_class($model) : (string)$model
return $class::DB()->query(
	'SELECT * FROM audit_log WHERE model=? AND record_id=? ORDER BY ts DESC LIMIT ?',
	$class, (string)$recordId, (int)$limit,
)->fetchAll(\PDO::FETCH_OBJ)

return $model::DB()->query(
	'SELECT * FROM audit_log WHERE '.$model::DB()->quoteId('user').'=? AND ts >= ? ORDER BY ts DESC LIMIT ?',
	(int)$userId, (int)$fromTs, (int)$limit,
)->fetchAll(\PDO::FETCH_OBJ)

$model::DB()->query('DELETE FROM audit_log WHERE ts < ?', time() - $olderThanSeconds)

300

180

56

8

600

$gapX = random_int(static::$P + 14, static::$W - static::$P - 6)
$gapY = random_int(12, static::$H - static::$P - 12)
%session->captcha = arr(gap: $gapX, exp: time() + static::$ttl)
return arr(gapX: $gapX, gapY: $gapY)

$w = static::$W
$h = static::$H
$p = static::$P
$bg = imagecreatetruecolor($w, $h)
$r0 = random_int(50, 170)
$g0 = random_int(50, 170)
$b0 = random_int(50, 170)
for ($x = 0; $x < $w; $x++){
	$col = imagecolorallocate($bg, (int)($r0 + $x * 0.5) % 256, (int)($g0 + $x * 0.2 + 30) % 256, (int)($b0 + ($w - $x) * 0.4) % 256)
	imagefilledrectangle($bg, $x, 0, $x, $h, $col)
}
imagealphablending($bg, true)
for ($i = 0; $i < 7; $i++){
	$col = imagecolorallocatealpha($bg, random_int(0, 255), random_int(0, 255), random_int(0, 255), random_int(55, 95))
	imagefilledellipse($bg, random_int(0, $w), random_int(0, $h), random_int(50, 130), random_int(50, 130), $col)
}
$piece = imagecreatetruecolor($p, $p)
imagecopy($piece, $bg, 0, 0, $gapX, $gapY, $p, $p)
imagerectangle($piece, 0, 0, $p - 1, $p - 1, imagecolorallocate($piece, 245, 245, 245))
imagefilledrectangle($bg, $gapX, $gapY, $gapX + $p - 1, $gapY + $p - 1, imagecolorallocatealpha($bg, 0, 0, 0, 95))
imagerectangle($bg, $gapX, $gapY, $gapX + $p - 1, $gapY + $p - 1, imagecolorallocate($bg, 255, 255, 255))
ob_start()
imagepng($bg)
$bgData = base64_encode(ob_get_clean())
ob_start()
imagepng($piece)
$pieceData = base64_encode(ob_get_clean())
return arr(bg: 'data:image/png;base64,'.$bgData, piece: 'data:image/png;base64,'.$pieceData)

$c = %session->captcha ?? null
if (!$c || time() > (int)($c['exp'] ?? 0)) return false
if (abs((int)round((float)$x) - (int)($c['gap'] ?? -999)) > static::$tol) return false
$t = json_decode((string)$telemetry, true)
if (!is_array($t)) return false
$d = (int)($t['d'] ?? 0)
$n = (int)($t['n'] ?? 0)
$xs = is_array($t['x'] ?? null) ? array_values($t['x']) : []
if ($d < 200 || $d > 60000) return false
if ($n < 5 || count($xs) < 4) return false
$deltas = []
for ($i = 1; $i < count($xs); $i++) $deltas[] = (float)$xs[$i] - (float)$xs[$i - 1]
if (array_sum(array_map('abs', $deltas)) < 30) return false
$mean = array_sum($deltas) / count($deltas)
$var = 0
foreach ($deltas AS $dd) $var += ($dd - $mean) ** 2
if (sqrt($var / count($deltas)) < 0.5) return false
return true

unset(%session->captcha)

$ch = static::issue()
$img = static::images($ch['gapX'], $ch['gapY'])
return (string)$this->field($img['bg'], $img['piece'], $ch['gapY'], static::$W, static::$H, static::$P)

<div#captcha data-w="$w" data-h="$h" data-p="$p" data-gapy="$gapY">
	<div.stage>
		<img.bg src="{{ $bg }}" alt="">
		<img.piece src="{{ $piece }}" alt="" draggable="false">
	</div>
	<div.track>
		<div.fill></div>
		<button.thumb type="button" tabindex="-1" aria-label="{{ en('Drag the slider until the piece fits') }}">&#8250;&#8250;</button>
	</div>
	<p.hint>{en: Drag the slider until the piece snaps into place}</p>
	<input type=hidden name=captcha_x>
	<input type=hidden name=captcha_t>
</div>

#captcha {
	margin: 14px 0 4px
	max-width: 300px
}
#captcha .stage {
	border-radius: 8px
	line-height: 0
	overflow: hidden
	position: relative
	touch-action: none
	user-select: none
	width: 100%
}
#captcha .bg {
	display: block
	height: auto
	pointer-events: none
	width: 100%
}
#captcha .piece {
	box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25), 0 2px 6px rgba(0, 0, 0, 0.4)
	left: 6px
	pointer-events: none
	position: absolute
	top: 0
}
#captcha .track {
	background: #e7e5e4
	border-radius: 8px
	height: 42px
	margin-top: 10px
	position: relative
	touch-action: none
}
#captcha .fill {
	background: #fed7aa
	border-radius: 8px
	height: 100%
	left: 0
	position: absolute
	top: 0
	width: 0
}
#captcha .thumb {
	align-items: center
	appearance: none
	background: #ea580c
	border: 0
	border-radius: 8px
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3)
	color: #fff
	cursor: grab
	display: flex
	font-family: inherit
	font-size: 18px
	font-weight: 700
	height: 42px
	justify-content: center
	left: 0
	margin: 0
	padding: 0
	position: absolute
	top: 0
	touch-action: none
	width: 42px
}
#captcha .thumb:active: cursor: grabbing
#captcha .thumb:hover: background: #c2410c
#captcha .hint {
	color: #78716c
	font-size: 12px
	margin: 6px 0 0
}

const captcha = {
	scale: 1, startCss: 6, travelMax: 0, maxThumb: 0,
	dragging: false, t0: 0, samples: [],
	cap: null, bg: null, piece: null, thumb: null, track: null, fill: null, xField: null, tField: null, submit: null,
	grab(){
		this.cap = obj('#captcha')
		if (!this.cap) return false
		this.bg = obj('.bg', this.cap)
		this.piece = obj('.piece', this.cap)
		this.thumb = obj('.thumb', this.cap)
		this.track = obj('.track', this.cap)
		this.fill = obj('.fill', this.cap)
		this.xField = obj('[name=captcha_x]', this.cap)
		this.tField = obj('[name=captcha_t]', this.cap)
		this.submit = obj('#registerSubmit')
		return true
	},
	layout(){
		if (!this.grab()) return
		const Wr = this.bg.clientWidth || +this.cap.dataset.w
		this.scale = Wr / +this.cap.dataset.w
		const pieceCss = +this.cap.dataset.p * this.scale
		this.piece.style.width = pieceCss + 'px'
		this.piece.style.height = pieceCss + 'px'
		this.piece.style.top = (+this.cap.dataset.gapy * this.scale) + 'px'
		this.startCss = 6 * this.scale
		this.piece.style.left = this.startCss + 'px'
		this.travelMax = Wr - pieceCss - this.startCss
		this.maxThumb = this.track.clientWidth - this.thumb.clientWidth
		if (this.submit) this.submit.disabled = true
	},
	set(tx){
		tx = Math.max(0, Math.min(this.maxThumb, tx))
		this.thumb.style.left = tx + 'px'
		this.fill.style.width = (tx + this.thumb.clientWidth) + 'px'
		const frac = this.maxThumb > 0 ? tx / this.maxThumb : 0
		const pl = this.startCss + frac * (this.travelMax - this.startCss)
		this.piece.style.left = pl + 'px'
		return pl / this.scale
	},
	down(e){
		if (!this.grab()) return
		this.dragging = true
		this.t0 = performance.now()
		this.samples = []
		e.preventDefault()
	},
	move(e){
		if (!this.dragging) return
		const px = e.touches ? e.touches[0].clientX : e.clientX
		const rect = this.track.getBoundingClientRect()
		const nx = this.set(px - rect.left - this.thumb.clientWidth / 2)
		this.samples.push({x: nx, t: performance.now() - this.t0})
	},
	up(){
		if (!this.dragging) return
		this.dragging = false
		const xs = this.samples.map(s => Math.round(s.x))
		this.xField.value = xs.length ? xs[xs.length - 1] : 0
		const step = Math.max(1, Math.ceil(xs.length / 24))
		this.tField.value = JSON.stringify({d: Math.round(this.samples.length ? this.samples[this.samples.length - 1].t : 0), n: this.samples.length, x: xs.filter((_, i) => i % step === 0)})
		if (this.submit) this.submit.disabled = false
	}
}

onExist('#captcha', () => captcha.layout())
on('load', '#captcha .bg', () => captcha.layout())
on('resize', window, () => captcha.layout())
on('mousedown touchstart', '#captcha .thumb', (el, e) => captcha.down(e))
on('mousemove touchmove', window, (el, e) => last(captcha.move(e), false))
on('mouseup touchend', window, (el, e) => captcha.up())

$values ??= $this->resolve()
foreach ($values AS $key => $value){
	$this->$key = is_array($value) ? new static($value) : new \SensitiveParameterValue((string)$value)
}

$data = []
$this->merge($data, $this->loadINI(data.'creds.ini'))
$this->merge($data, $this->envValues(false))
$this->merge($data, $this->envValues(true))
return $data

if (!is_file($file)) return []
$ini = parse_ini_file($file, true, INI_SCANNER_RAW)
return is_array($ini) ? $ini : []

$out = []
$prefix = $hostScoped ? ('PHLO_'.$this->hostKey().'__') : 'PHLO__'
$sources = []
is_array($_ENV ?? null) && $sources[] = $_ENV
is_array($_SERVER ?? null) && $sources[] = $_SERVER
is_array($env = getenv()) && $sources[] = $env
foreach ($sources AS $source){
	foreach ($source AS $key => $value){
		$key = (string)$key
		if (!str_starts_with($key, $prefix)) continue
		$path = substr($key, strlen($prefix))
		if (!$path) continue
		$this->envAssign($out, explode('__', $path), (string)$value)
	}
}
return $out

$host = strtoupper(%req->host)
$host = preg_replace('/[^A-Z0-9]+/', us, $host)
return trim($host, us)

$parts = array_values(array_filter(loop($parts, fn($part) => trim($part)), 'strlen'))
if (!$parts) return
$node = &$target
$last = count($parts) - 1
foreach ($parts AS $i => $part){
	if ($i === $last){
		$node[$part] = $value
		return
	}
	if (!isset($node[$part]) || !is_array($node[$part])) $node[$part] = []
	$node = &$node[$part]
}

foreach ($add AS $key => $value){
	if (isset($base[$key]) && is_array($base[$key]) && is_array($value)){
		$this->merge($base[$key], $value)
		continue
	}
	$base[$key] = $value
}

if ($key === 'toArray') return loop($this->objData, fn($value) => is_a($value, 'SensitiveParameterValue') ? $value->getValue() : $value)
if (isset($this->objData[$key]) && is_a($this->objData[$key], '\SensitiveParameterValue')) return $this->objData[$key]->getValue()

loop($this->objData, fn($value) => is_a($value, '\SensitiveParameterValue') ? str_repeat('*', strlen($value->getValue())) : $value)

<meta name=csrf content="$this->token">

%session->csrf ??= token(32)

hash_equals($this->token, (string)($_SERVER['HTTP_X_CSRF_TOKEN'] ?? void))

arr(csrf: $this->token = %session->csrf = token(32))

app.mod.csrf = value => obj('meta[name="csrf"]').content = value

strlen($this->secret) >= 32 || error('JWT secret must be at least 32 bytes', 500)

$now = time()
$claims['iat'] = $now
$claims['exp'] = $now + $ttl
if ($this->issuer !== void) $claims['iss'] = $this->issuer
$body = $this->encode(['alg' => 'HS256', 'typ' => 'JWT']).dot.$this->encode($claims)
return $body.dot.$this->sig($body)

$token = preg_replace('/^Bearer\s+/i', void, trim($token))
$parts = explode(dot, $token)
count($parts) === 3 || error('JWT malformed', 401)
[$h, $p, $s] = $parts
$header = (array)json_decode((string)$this->decode($h), true)
($header['alg'] ?? void) === 'HS256' || error('JWT algorithm not allowed', 401)
hash_equals($this->sig($h.dot.$p), $s) || error('JWT signature invalid', 401)
$claims = (array)json_decode((string)$this->decode($p), true)
$now = time()
isset($claims['nbf']) && $now + $this->leeway < $claims['nbf'] && error('JWT not yet valid', 401)
isset($claims['exp']) && $now - $this->leeway >= $claims['exp'] && error('JWT expired', 401)
$this->issuer === void || ($claims['iss'] ?? void) === $this->issuer || error('JWT issuer mismatch', 401)
return $claims

$this->encode(hash_hmac('sha256', $body, $this->secret, true))

rtrim(strtr(base64_encode(is_string($data) ? $data : (string)json_encode($data, jsonFlat)), '+/', '-_'), eq)

(string)base64_decode(strtr($data, '-_', '+/'))

$endpoint.(str_contains($endpoint, '?') ? '&' : '?').http_build_query($params)

$body = ['grant_type' => $grantType, 'client_id' => (string)$clientId, 'client_secret' => (string)$clientSecret]
foreach ($extra AS $key => $value){
	if ($value !== null && $value !== void) $body[$key] = $value
}
try {
	$res = HTTP($tokenUrl, ['Content-Type: application/x-www-form-urlencoded', 'Accept: application/json'], POST: http_build_query($body))
}
catch (\Throwable $e){
	return ['error' => $e->getMessage()]
}
return json_decode((string)$res, true) ?: ['error' => 'Invalid token response']

static::token($tokenUrl, $clientId, $clientSecret, 'authorization_code', ['code' => $code, 'redirect_uri' => $redirectUri] + $extra)

static::token($tokenUrl, $clientId, $clientSecret, 'refresh_token', ['refresh_token' => $refreshToken] + $extra)

if ($storage === 'apcu') return static::checkApcu($key, $limit, $windowSeconds)
$now = time()
// One atomic upsert: increment within the window or reset to a new one, and carry the
// resulting per-request count out via LAST_INSERT_ID. A separate read-then-write would
// let two requests arriving together both pass the limit.
%MySQL->query('INSERT INTO rate_limit (rkey, count, window_start) VALUES (?, LAST_INSERT_ID(1), ?) ON DUPLICATE KEY UPDATE count = LAST_INSERT_ID(IF(? - window_start < ?, count + 1, 1)), window_start = IF(? - window_start < ?, window_start, ?)', $key, $now, $now, $windowSeconds, $now, $windowSeconds, $now)
return (int)%MySQL->query('SELECT LAST_INSERT_ID()')->fetchColumn() <= $limit

$window = (int)floor(time() / $windowSeconds) * $windowSeconds
$apcuKey = 'phlo.rate.'.$key.':'.$window
apcu_add($apcuKey, 0, $windowSeconds)
return apcu_inc($apcuKey, 1) <= $limit

$now = time()
$row = %MySQL->query('SELECT count, window_start FROM rate_limit WHERE rkey=?', $key)->fetchObject('obj') ?: null
if (!$row || ($now - (int)$row->window_start) >= $windowSeconds) return obj(used: 0, limit: $limit, resetIn: 0)
return obj(used: (int)$row->count, limit: $limit, resetIn: max(0, ((int)$row->window_start + $windowSeconds) - $now))

%MySQL->query('DELETE FROM rate_limit WHERE rkey=?', $key)

%MySQL->query('DELETE FROM rate_limit WHERE window_start < ?', time() - $olderThanSeconds)

[]

[]

%app->nonce = token(8)

%res->header('X-Frame-Options', $mode)

$this->whitelist ? ' '.implode(space, array_map(fn($d) => "https://*.$d", (array)$this->whitelist)) : void

$this->sources ? ' '.implode(space, (array)$this->sources) : void

$this->base
if (%req->async) return
%res->header('Cache-Control', 'no-store')
$nonce = $this->setNonce
%res->header('Content-Security-Policy', "default-src 'self'; script-src 'nonce-$nonce'; worker-src 'self'; style-src 'self' 'nonce-$nonce'; img-src 'self' data:$this->sourceList; media-src 'self' blob:$this->sourceList; font-src 'self'; connect-src 'self'$this->sourceList; form-action 'self'; object-src 'none'; frame-src 'self'$this->frameWhitelist; frame-ancestors 'none'; base-uri 'self'")

$this->base
if (%req->async) return
%res->header('Content-Security-Policy', "default-src 'self'; script-src 'self'".(debug ? " 'unsafe-inline'" : void)."; style-src 'self' 'unsafe-inline'; img-src 'self' data:$this->sourceList; media-src 'self' blob:$this->sourceList; font-src 'self'; connect-src 'self'$this->sourceList; form-action 'self'; object-src 'none'; frame-src 'self'$this->frameWhitelist; frame-ancestors 'none'; base-uri 'self'")

$this->base
if (%req->async) return
%res->header('Content-Security-Policy', "default-src 'self'; script-src 'self'".(debug ? " 'unsafe-inline'" : void)."; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; media-src 'self' blob:$this->sourceList; font-src 'self'; connect-src 'self'$this->sourceList; form-action 'self'; object-src 'none'; frame-src 'self'$this->frameWhitelist; frame-ancestors 'none'; base-uri 'self'")

%res->api = true
%res->header('Content-Security-Policy', "default-src 'none'; frame-ancestors 'none'")
%res->header('X-Content-Type-Options', 'nosniff')
%res->header('Referrer-Policy', 'no-referrer')

%res->header('Referrer-Policy', 'strict-origin-when-cross-origin')
%res->header('X-Content-Type-Options', 'nosniff')
%req->async || %res->header('Cross-Origin-Opener-Policy', 'same-origin')
%req->async || %res->header('Cross-Origin-Resource-Policy', 'same-origin')
%req->async || %res->header('Access-Control-Allow-Origin', %req->base)
%req->async || %res->header('X-Frame-Options', 'DENY')

arr(
	google: arr(
		label: 'Google',
		authorize: 'https://accounts.google.com/o/oauth2/v2/auth',
		token: 'https://oauth2.googleapis.com/token',
		jwks: 'https://www.googleapis.com/oauth2/v3/certs',
		scope: 'openid email profile',
		issuer: 'https://accounts.google.com',
	),
	microsoft: arr(
		label: 'Microsoft',
		authorize: 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize',
		token: 'https://login.microsoftonline.com/common/oauth2/v2.0/token',
		jwks: 'https://login.microsoftonline.com/common/discovery/v2.0/keys',
		scope: 'openid email profile',
		issuer: 'https://login.microsoftonline.com/',
	),
	apple: arr(
		label: 'Apple',
		authorize: 'https://appleid.apple.com/auth/authorize',
		token: 'https://appleid.apple.com/auth/token',
		jwks: 'https://appleid.apple.com/auth/keys',
		scope: 'name email',
		issuer: 'https://appleid.apple.com',
	),
)

$p = static::providers()[$provider] ?? null
if (!$p) return null
$section = %creds->{$provider} ?? null
$creds = is_object($section) ? (array)$section->toArray : []
return $p + arr(
	client_id: (string)($creds['client_id'] ?? void),
	client_secret: (string)($creds['client_secret'] ?? void),
	redirect_uri: (string)($creds['redirect_uri'] ?? ('https://'.%req->host.'/auth/'.$provider.'/callback')),
)

$c = static::config($provider)
return $c && $c['client_id'] !== void

$c = static::config($provider)
$params = arr(
	client_id: $c['client_id'],
	redirect_uri: $c['redirect_uri'],
	response_type: 'code',
	scope: $c['scope'],
	state: $state,
)
if ($nonce !== void) $params['nonce'] = $nonce
if ($provider === 'apple') $params['response_mode'] = 'form_post'
return OAuth2::authorizeUrl($c['authorize'], $params)

$cfg = static::config($provider)
if (!$cfg || $cfg['client_id'] === void) return null
$secret = $provider === 'apple' ? static::appleSecret() : $cfg['client_secret']
$token = OAuth2::exchangeCode($cfg['token'], $cfg['client_id'], $secret, $code, $cfg['redirect_uri'])
$jwt = (string)($token['id_token'] ?? void)
if (!static::verifySignature($provider, $jwt)) return null
$claims = static::decodeIdToken($jwt)
if (!$claims || !static::verifyClaims($provider, $cfg, $claims, $nonce)) return null
$profile = static::normalize($provider, $claims)
if ($provider === 'apple' && !$profile['name']){
	$u = json_decode((string)(%payload->user ?? void), true)
	if (is_array($u) && !empty($u['name'])) $profile['name'] = trim(((string)($u['name']['firstName'] ?? void)).space.((string)($u['name']['lastName'] ?? void)))
}
return $profile

$parts = explode(dot, (string)$jwt)
if (count($parts) < 2) return null
$claims = json_decode(static::b64urlDecode($parts[1]), true)
return is_array($claims) ? $claims : null

arr(RS256: OPENSSL_ALGO_SHA256)

$parts = explode(dot, (string)$jwt)
if (count($parts) !== 3) return false
$header = json_decode(static::b64urlDecode($parts[0]), true)
if (!is_array($header)) return false
$alg = static::algs()[(string)($header['alg'] ?? void)] ?? null
$kid = (string)($header['kid'] ?? void)
if (!$alg || !$kid) return false
$pem = static::key($provider, $kid)
if (!$pem) return false
return openssl_verify($parts[0].dot.$parts[1], static::b64urlDecode($parts[2]), $pem, $alg) === 1

$cached = %req->socialJwks ?? []
if (isset($cached[$provider])) return $cached[$provider]
$url = (string)(static::providers()[$provider]['jwks'] ?? void)
$keys = []
if ($url){
	$data = json_decode((string)HTTP($url, ['Accept: application/json']), true)
	if (is_array($data) && is_array($data['keys'] ?? null)) $keys = $data['keys']
}
$cached[$provider] = $keys
%req->socialJwks = $cached
return $keys

foreach (static::jwks($provider) AS $jwk){
	if ((string)($jwk['kid'] ?? void) === $kid) return static::jwkToPem((array)$jwk)
}
return void

if ((string)($jwk['kty'] ?? void) !== 'RSA') return void
$n = static::b64urlDecode((string)($jwk['n'] ?? void))
$e = static::b64urlDecode((string)($jwk['e'] ?? void))
if (!$n || !$e) return void
$key = static::der(0x30, static::derInt($n).static::derInt($e))
$bits = static::der(0x03, "\x00".$key)
$algo = static::der(0x30, "\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01\x05\x00")
$spki = static::der(0x30, $algo.$bits)
return '-----BEGIN PUBLIC KEY-----'.lf.chunk_split(base64_encode($spki), 64, lf).'-----END PUBLIC KEY-----'.lf

$len = strlen($content)
if ($len < 0x80) return chr($tag).chr($len).$content
$bytes = ltrim(pack('N', $len), "\x00")
return chr($tag).chr(0x80 | strlen($bytes)).$bytes.$content

$bytes = ltrim((string)$bytes, "\x00")
if ($bytes === void) $bytes = "\x00"
if (ord($bytes[0]) & 0x80) $bytes = "\x00".$bytes
return static::der(0x02, $bytes)

$data = strtr((string)$data, '-_', '+/')
$pad = strlen($data) % 4
if ($pad) $data .= str_repeat(eq, 4 - $pad)
return (string)base64_decode($data)

if ((int)($claims['exp'] ?? 0) <= time()) return false
$aud = $claims['aud'] ?? void
if (!in_array((string)($cfg['client_id'] ?? void), array_map('strval', is_array($aud) ? $aud : [$aud]), true)) return false
if ($nonce !== void && !hash_equals((string)$nonce, (string)($claims['nonce'] ?? void))) return false
return static::verifyIssuer($provider, $claims)

$iss = (string)($claims['iss'] ?? void)
if ($provider === 'microsoft'){
	$tid = (string)($claims['tid'] ?? void)
	return $tid !== void && $iss === 'https://login.microsoftonline.com/'.$tid.'/v2.0'
}
$expected = (string)(static::providers()[$provider]['issuer'] ?? void)
if ($expected === void) return false
return $iss === $expected || ($provider === 'google' && $iss === 'accounts.google.com')

$ev = $claims['email_verified'] ?? null
$verified = $ev === true || $ev === 'true'
if ($provider === 'microsoft'){
	$edov = $claims['xms_edov'] ?? null
	$verified = $edov === true || $edov === 'true' || $edov === 1 || $edov === '1'
}
$name = (string)($claims['name'] ?? void)
if (!$name) $name = trim(((string)($claims['given_name'] ?? void)).space.((string)($claims['family_name'] ?? void)))
return arr(
	provider: $provider,
	uid: (string)($claims['sub'] ?? void),
	email: strtolower(trim((string)($claims['email'] ?? void))),
	verified: $verified,
	name: trim($name),
)

rtrim(strtr(base64_encode((string)$data), '+/', '-_'), eq)

$section = %creds->apple ?? null
$creds = is_object($section) ? (array)$section->toArray : []
$teamId = (string)($creds['team_id'] ?? void)
$keyId = (string)($creds['key_id'] ?? void)
$clientId = (string)($creds['client_id'] ?? void)
$keyData = (string)($creds['private_key'] ?? void)
if (!$keyData && !empty($creds['key_file']) && is_file((string)$creds['key_file'])) $keyData = (string)file_get_contents((string)$creds['key_file'])
if (!$teamId || !$keyId || !$clientId || !$keyData) return void
$key = openssl_pkey_get_private($keyData)
if (!$key) return void
$now = time()
$input = static::b64url(json_encode(arr(alg: 'ES256', kid: $keyId))).dot.static::b64url(json_encode(arr(iss: $teamId, iat: $now, exp: $now + 15552000, aud: 'https://appleid.apple.com', sub: $clientId)))
$der = void
if (!openssl_sign($input, $der, $key, OPENSSL_ALGO_SHA256)) return void
return $input.dot.static::b64url(static::derToJose($der))

$rlen = ord($der[3])
$r = substr((string)$der, 4, $rlen)
$slen = ord($der[4 + $rlen + 1])
$s = substr((string)$der, 4 + $rlen + 2, $slen)
return static::pad32($r).static::pad32($s)

$x = ltrim((string)$x, "\x00")
return str_pad($x, 32, "\x00", STR_PAD_LEFT)