Online PHP editor | perf for 3Nju4

<?php class CTFCodec { private string $key; // ----------------------------------------------------- // Constructeur : on dérive la clé en SHA256 (32 octets) // ----------------------------------------------------- public function __construct(string $key) { $this->key = hash("sha256", $key, true); } // ----------------------------------------------------- // Rotation gauche sur 8 bits // ----------------------------------------------------- private function rotl(int $b, int $n): int { return (($b << $n) & 0xFF) | ($b >> (8 - $n)); } // ----------------------------------------------------- // Rotation droite sur 8 bits // ----------------------------------------------------- private function rotr(int $b, int $n): int { return (($b >> $n) | ($b << (8 - $n))) & 0xFF; } // ----------------------------------------------------- // Masque pseudo-aléatoire dépendant clé + seed + index // ----------------------------------------------------- private function mask(int $i, int $seed): int { $h = hash("sha256", $this->key . chr($seed) . pack("N", $i), true); return ord($h[$i % 32]); } // ----------------------------------------------------- // Layer 1 : XOR + rotations // ----------------------------------------------------- private function L1E(string $data, int $seed): string { $out = ""; foreach (str_split($data) as $i => $c) { $b = ord($c); $b = $this->rotl($b, ($i + $seed) % 7); $b ^= $this->mask($i, $seed); $b = $this->rotr($b, ($seed + $i) % 5); $out .= chr($b); } return $out; } private function L1D(string $data, int $seed): string { $out = ""; foreach (str_split($data) as $i => $c) { $b = ord($c); $b = $this->rotl($b, ($seed + $i) % 5); $b ^= $this->mask($i, $seed); $b = $this->rotr($b, ($i + $seed) % 7); $out .= chr($b); } return $out; } // ----------------------------------------------------- // Layer 2 : shuffle pseudo-chaotique (inversible) // ----------------------------------------------------- private function L2E(string $data, int $seed): string { $a = str_split($data); $n = count($a); for ($i = 0; $i < $n; $i++) { $j = ($this->mask($i, $seed) + $seed) % $n; [$a[$i], $a[$j]] = [$a[$j], $a[$i]]; } return implode("", $a); } private function L2D(string $data, int $seed): string { $a = str_split($data); $n = count($a); for ($i = $n - 1; $i >= 0; $i--) { $j = ($this->mask($i, $seed) + $seed) % $n; [$a[$i], $a[$j]] = [$a[$j], $a[$i]]; } return implode("", $a); } // ----------------------------------------------------- // Encodage final : Base64URL stable // ----------------------------------------------------- private function b64u_encode(string $d): string { return rtrim(strtr(base64_encode($d), "+/", "-_"), "="); } private function b64u_decode(string $d): string { $pad = 4 - (strlen($d) % 4); if ($pad < 4) $d .= str_repeat("=", $pad); return base64_decode(strtr($d, "-_", "+/")); } // ----------------------------------------------------- // ENCODE // ----------------------------------------------------- public function encode(string $msg): string { $seed = random_int(0, 255); // seed mutation $msg = $this->L1E($msg, $seed); $msg = $this->L2E($msg, $seed); $msg = $this->b64u_encode($msg); return sprintf("%02X", $seed) . "." . $msg; } // ----------------------------------------------------- // DECODE // ----------------------------------------------------- public function decode(string $cipher): string { list($hex, $data) = explode(".", $cipher, 2); $seed = hexdec($hex); $data = $this->b64u_decode($data); $data = $this->L2D($data, $seed); $data = $this->L1D($data, $seed); return $data; } } /*********************************************** * TEST * ***********************************************/ $codec = new CTFCodec(""); $input = ""; $enc = $codec->encode($input); $dec = $codec->decode($enc); echo "Original : $input\n"; echo "Encodé : $enc\n"; echo "Décodé : $dec\n"; ?>

Version	System time (s)	User time (s)	Memory (MiB)
8.5.3	0.032	0.009	16.73
8.5.2	0.034	0.006	16.73
8.5.1	0.029	0.005	16.73
8.5.0	0.008	0.004	16.76
8.4.18	0.026	0.010	19.81
8.4.17	0.031	0.010	19.80
8.4.16	0.033	0.010	19.69
8.4.15	0.027	0.006	19.85
8.4.14	0.023	0.010	17.83
8.4.13	0.027	0.005	17.56
8.4.12	0.028	0.005	17.99
8.4.11	0.035	0.009	17.77
8.4.10	0.039	0.006	17.79
8.4.9	0.034	0.008	17.94
8.4.8	0.030	0.008	17.91
8.4.7	0.036	0.009	17.89
8.4.6	0.036	0.008	18.00
8.4.5	0.039	0.007	17.97
8.4.4	0.041	0.008	17.62
8.4.3	0.040	0.010	17.69
8.4.2	0.035	0.005	17.83
8.4.1	0.034	0.012	17.75
8.3.30	0.020	0.005	18.45
8.3.29	0.028	0.009	18.44
8.3.28	0.031	0.009	18.29
8.3.27	0.028	0.008	16.85
8.3.26	0.028	0.008	16.75
8.3.25	0.022	0.006	16.83
8.3.24	0.029	0.007	16.82
8.3.23	0.034	0.006	16.88
8.3.22	0.028	0.007	16.76
8.3.21	0.034	0.006	16.75
8.3.20	0.024	0.008	16.83
8.3.19	0.032	0.007	16.73
8.3.18	0.031	0.009	16.82
8.3.17	0.029	0.008	16.81
8.3.16	0.038	0.011	16.75
8.3.15	0.027	0.006	16.81
8.3.14	0.029	0.006	16.85
8.3.13	0.022	0.005	16.80
8.3.12	0.025	0.005	16.79
8.3.11	0.021	0.005	16.81
8.3.10	0.016	0.005	16.96
8.3.9	0.017	0.005	16.86
8.3.8	0.017	0.004	16.89
8.3.7	0.022	0.002	16.83
8.3.6	0.019	0.005	16.85
8.3.5	0.017	0.004	16.81
8.3.4	0.025	0.007	18.00
8.3.3	0.021	0.007	17.90
8.3.2	0.029	0.005	18.09
8.3.1	0.025	0.010	18.10
8.3.0	0.028	0.009	18.10