Online PHP editor | perf for XSCbd

<?php $password = 'My Plaintext Password'; $plaintext = 'This is my message'; $secretBox = new Secretbox(); $ciphertext = $secretBox->encrypt($plaintext, $password); var_dump($ciphertext); $decryptedPlaintext = $secretBox->decrypt($ciphertext, $password); var_dump($decryptedPlaintext); assertThat($decryptedPlaintext === $plaintext, 'Can decrypt'); assertThat( $secretBox->encrypt($plaintext, $password) !== $secretBox->encrypt($plaintext, $password), 'Should not result in same ciphertext' ); try { $failed = false; // modify ciphertext $ciphertext[65] = 'f'; $secretBox->decrypt($ciphertext, $password); } catch (\Exception $e) { $failed = true; } finally { assertThat($failed, 'Tempered chiphertext should result in exception'); } class Secretbox { public function encrypt(string $plaintext, string $password): string { // create a random salt for key derivation $salt = random_bytes(SODIUM_CRYPTO_PWHASH_SALTBYTES); $key = $this->deriveKeyFromUserPassword($password, $salt); $nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); $ciphertext = sodium_crypto_secretbox($plaintext, $nonce, $key); sodium_memzero($password); sodium_memzero($key); return $salt.$nonce.$ciphertext; } public function decrypt(string $ciphertext, string $password): string { $salt = substr($ciphertext, 0, SODIUM_CRYPTO_PWHASH_SALTBYTES); $nonce = substr($ciphertext, SODIUM_CRYPTO_PWHASH_SALTBYTES, SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); $ciphertext = substr($ciphertext, SODIUM_CRYPTO_PWHASH_SALTBYTES + SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); $key = $this->deriveKeyFromUserPassword($password, $salt); $plaintext = sodium_crypto_secretbox_open($ciphertext, $nonce, $key); sodium_memzero($password); sodium_memzero($key); sodium_memzero($nonce); if ($plaintext === false) { throw new \InvalidArgumentException('Bad ciphertext'); } return $plaintext; } private function deriveKeyFromUserPassword(string $password, string $salt): string { $key = sodium_crypto_pwhash( SODIUM_CRYPTO_SECRETBOX_KEYBYTES, $password, $salt, SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE, SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE ); sodium_memzero($password); return $key; } } function assertThat(bool $expressionResult, string $message) { if (!$expressionResult) { throw new \RuntimeException($message); } }

Version	System time (s)	User time (s)	Memory (MiB)
7.4.0	0.083	0.553	46.82
7.3.12	0.106	0.650	47.17
7.3.11	0.090	0.691	47.01
7.3.10	0.076	0.537	46.92
7.3.9	0.076	0.550	47.10
7.3.8	0.073	0.577	46.86
7.3.7	0.073	0.553	47.00
7.3.6	0.066	0.607	46.64
7.3.5	0.083	0.518	46.79
7.3.4	0.040	0.504	46.98
7.3.3	0.066	0.541	46.94
7.3.2	0.100	0.506	48.62
7.3.1	0.066	0.531	48.59
7.3.0	0.080	0.451	48.69
7.2.25	0.076	0.641	47.12
7.2.24	0.093	0.693	47.11
7.2.23	0.063	0.537	47.05
7.2.22	0.066	0.521	47.16
7.2.21	0.060	0.510	47.09
7.2.20	0.093	0.619	47.26
7.2.19	0.073	0.513	47.00
7.2.18	0.060	0.497	47.09
7.2.17	0.070	0.575	47.10
7.2.0	0.134	0.802	84.09
7.1.33	0.000	0.015	15.82
7.1.32	0.000	0.011	15.80
7.1.31	0.003	0.010	15.70
7.1.30	0.003	0.008	15.79
7.1.29	0.008	0.003	15.44
7.1.28	0.005	0.007	15.89
7.1.27	0.003	0.006	15.68
7.1.26	0.008	0.004	15.81
7.1.12	0.006	0.008	18.69
7.1.11	0.006	0.007	18.24
7.1.10	0.009	0.006	17.88
7.1.9	0.006	0.006	18.11
7.1.8	0.006	0.009	18.34
7.1.7	0.006	0.009	17.02
7.1.6	0.013	0.013	35.18
7.1.5	0.010	0.016	34.94
7.1.4	0.013	0.013	34.39
7.1.3	0.013	0.013	34.42
7.1.2	0.017	0.007	34.63
7.1.1	0.006	0.006	16.45
7.1.0	0.006	0.009	16.67