Online PHP editor | perf for 5Nebh

<?php if (PHP_VERSION_ID < 70000) { die('no'); } /** * Use HKDF to derive multiple keys from one. * http://tools.ietf.org/html/rfc5869 * * @param string $hash Hash Function * @param string $ikm Initial Keying Material * @param int $length How many bytes? * @param string $info What sort of key are we deriving? * @param string $salt * @return string * @throws Exception */ function hash_hkdf(string $algo, string $ikm, int $length, string $info = '', $salt = null) { $digest_length = mb_strlen(hash_hmac($algo, '', '', true), '8bit'); // Sanity-check the desired output length. if (empty($length) || !is_int($length) || $length < 0 || $length > 255 * $digest_length) { throw new Exception("Bad output length requested of HKDF."); } // "if [salt] not provided, is set to a string of HashLen zeroes." if ($salt === null) { $salt = str_repeat("\x00", $digest_length); } // HKDF-Extract: // PRK = HMAC-Hash(salt, IKM) // The salt is the HMAC key. $prk = hash_hmac($algo, $ikm, $salt, true); // HKDF-Expand: // This check is useless, but it serves as a reminder to the spec. if (mb_strlen($prk, '8bit') < $digest_length) { throw new Exception('HKDF-Expand failed'); } // T(0) = '' $t = ''; $last_block = ''; for ($block_index = 1; mb_strlen($t, '8bit') < $length; ++$block_index) { // T(i) = HMAC-Hash(PRK, T(i-1) | info | 0x??) $last_block = hash_hmac( $algo, $last_block . $info . chr($block_index), $prk, true ); // T = T(1) | T(2) | T(3) | ... | T(N) $t .= $last_block; } // ORM = first L octets of T $orm = mb_substr($t, 0, $length, '8bit'); if ($orm === false) { throw new Exception('Unexpected error'); } return $orm; } /** * Encrypt a message with AES-256-CTR + HMAC-SHA256 * @param string $message * @param string $key * @return string */ function aes256ctr_hmacsha256_encrypt(string $message, string $key) { $iv = random_bytes(16); $salt = random_bytes(16); $eKey = hash_hkdf('sha256', $key, 32, 'Encryption Key', $salt); $aKey = hash_hkdf('sha256', $key, 32, 'Authentication Key', $salt); $ciphertext = $iv . $salt . openssl_encrypt( $message, 'aes-256-ctr', $eKey, OPENSSL_RAW_DATA, $iv ); $mac = hash_hmac('sha256', $ciphertext, $aKey, true); return base64_encode($mac . $ciphertext); } /** * Decrypt a message with AES-256-CTR + HMAC-SHA256 * @param string $message * @param string $key * @return string * @throws Exception */ function aes256ctr_hmacsha256_decrypt(string $ciphertext, string $key) { $decode = base64_decode($ciphertext); if ($decode === false) { throw new Exception("Encoding error"); } $mac = mb_substr($decode, 0, 32, '8bit'); $iv = mb_substr($decode, 32, 16, '8bit'); $salt = mb_substr($decode, 48, 16, '8bit'); $ciphertext = mb_substr($decode, 64, null, '8bit'); $aKey = hash_hkdf('sha256', $key, 32, 'Authentication Key', $salt); $calcMac = hash_hmac('sha256', $iv . $salt . $ciphertext, $aKey, true); if (!hash_equals($calcMac, $mac)) { throw new Exception("Invalid message"); } $eKey = hash_hkdf('sha256', $key, 32, 'Encryption Key', $salt); return openssl_decrypt( $ciphertext, 'aes-256-ctr', $eKey, OPENSSL_RAW_DATA, $iv ); } $key = random_bytes(32); $message = "This code rocks"; $ciphertext = aes256ctr_hmacsha256_encrypt($message, $key); var_dump($ciphertext); $plaintext = aes256ctr_hmacsha256_decrypt($ciphertext, $key); var_dump($plaintext);

Version	System time (s)	User time (s)	Memory (MiB)
7.4.0	0.007	0.008	14.85
7.3.12	0.008	0.008	14.77
7.3.11	0.007	0.011	14.74
7.3.10	0.010	0.005	14.72
7.3.9	0.008	0.005	14.84
7.3.8	0.007	0.009	14.77
7.3.7	0.008	0.008	14.63
7.3.6	0.005	0.008	14.70
7.3.5	0.004	0.007	14.77
7.3.4	0.004	0.007	14.66
7.3.3	0.003	0.008	14.72
7.3.2	0.009	0.003	16.60
7.3.1	0.007	0.004	16.50
7.3.0	0.003	0.008	16.39
7.2.25	0.011	0.007	15.01
7.2.24	0.007	0.011	14.83
7.2.23	0.012	0.003	14.86
7.2.22	0.006	0.009	14.97
7.2.21	0.007	0.008	14.66
7.2.20	0.003	0.013	14.82
7.2.19	0.004	0.011	14.65
7.2.18	0.006	0.006	14.88
7.2.17	0.010	0.007	14.88
7.1.33	0.010	0.003	15.57
7.1.32	0.002	0.007	15.59
7.1.31	0.004	0.011	15.57
7.1.30	0.007	0.007	15.50
7.1.29	0.007	0.004	15.35
7.1.28	0.008	0.005	15.49
7.1.27	0.008	0.006	15.58
7.1.26	0.005	0.005	15.70
7.1.7	0.000	0.010	16.98
7.1.6	0.010	0.014	19.19
7.1.5	0.010	0.013	16.84
7.1.0	0.003	0.073	22.50
7.0.20	0.000	0.008	16.44
7.0.10	0.007	0.073	20.04
7.0.9	0.020	0.070	20.01
7.0.8	0.007	0.067	20.07
7.0.7	0.010	0.047	20.02
7.0.6	0.013	0.043	20.05
7.0.5	0.017	0.050	20.48
7.0.4	0.007	0.087	20.14
7.0.3	0.017	0.077	20.20
7.0.2	0.007	0.050	20.19
7.0.1	0.003	0.060	20.06
7.0.0	0.003	0.087	20.13
5.6.28	0.010	0.067	20.79
5.6.25	0.007	0.030	20.57
5.6.24	0.007	0.050	20.64
5.6.23	0.003	0.047	20.63
5.6.22	0.010	0.047	20.65
5.6.21	0.010	0.073	20.67
5.6.20	0.013	0.043	21.04
5.6.19	0.010	0.073	21.09
5.6.18	0.000	0.090	21.12
5.6.17	0.007	0.090	21.09
5.6.16	0.010	0.057	20.93
5.6.15	0.010	0.073	21.08
5.6.14	0.007	0.077	21.06
5.6.13	0.007	0.050	21.04
5.6.12	0.007	0.070	20.96
5.6.11	0.000	0.047	21.13
5.6.10	0.007	0.040	20.95
5.6.9	0.020	0.060	21.12
5.6.8	0.020	0.067	20.37
5.6.7	0.007	0.070	20.47
5.6.6	0.003	0.050	20.38
5.6.5	0.010	0.073	20.56
5.6.4	0.013	0.040	20.45
5.6.3	0.007	0.037	20.38
5.6.2	0.013	0.040	20.24
5.6.1	0.007	0.050	20.38
5.6.0	0.007	0.037	20.36
5.5.38	0.003	0.050	20.41
5.5.37	0.003	0.047	20.39
5.5.36	0.010	0.060	20.39
5.5.35	0.007	0.053	20.48
5.5.34	0.017	0.040	20.92
5.5.33	0.007	0.067	20.87
5.5.32	0.007	0.080	20.65
5.5.31	0.010	0.067	20.89
5.5.30	0.010	0.077	20.64
5.5.29	0.007	0.060	20.92
5.5.28	0.003	0.067	20.90
5.5.27	0.013	0.067	20.87
5.5.26	0.010	0.037	20.91
5.5.25	0.003	0.070	20.71
5.5.24	0.007	0.080	20.14
5.5.23	0.007	0.077	20.18
5.5.22	0.003	0.040	20.02
5.5.21	0.013	0.040	20.28
5.5.20	0.017	0.060	20.24
5.5.19	0.010	0.047	20.23
5.5.18	0.013	0.070	20.09
5.5.16	0.007	0.070	19.95
5.5.15	0.010	0.070	20.13
5.5.14	0.003	0.080	20.21
5.5.13	0.000	0.043	20.15
5.5.12	0.007	0.040	20.15
5.5.11	0.007	0.037	20.25
5.5.10	0.007	0.043	20.14
5.5.9	0.007	0.037	20.05
5.5.8	0.003	0.037	20.06
5.5.7	0.010	0.067	20.09
5.5.6	0.007	0.033	20.09
5.5.5	0.003	0.037	20.16
5.5.4	0.017	0.060	20.05
5.5.3	0.010	0.070	20.14
5.5.2	0.000	0.050	20.11
5.5.1	0.010	0.067	20.05
5.5.0	0.007	0.033	20.04