Online PHP editor | perf for nYVPf

@ 2016-06-05T07:43:31Z

<?php
    if (PHP_VERSION_ID < 70000) exit;
    $res = openssl_pkey_new([
        'digest_alg' => 'sha256',
        'private_key_bite' => 2048,
        'private_key_type' => OPENSSL_KEYTYPE_RSA
    ]);
    openssl_pkey_export($res, $privateKey);
    $publicKey = openssl_pkey_get_details($res)['key'];
    
    $message = 'Prime Numbers Rock!';
    $aesKey = random_bytes(32);
    // Basically a poor-man's HKDF by just using HMAC
        $keyE = hash_hmac('sha256', 'Encryption Key', $aesKey, true);
        $keyA = hash_hmac('sha256', 'Authentication Key', $aesKey, true);
    
    $iv = random_bytes(16);
    $ciphertext = openssl_encrypt($message, 'aes-256-ctr', $keyE, OPENSSL_RAW_DATA, $iv);
    $mac = hash_hmac('sha256', $iv .$ciphertext, $keyA, true);
    
    $combined = $mac . $iv . $ciphertext;
    $rsaCipher = '';
    openssl_public_encrypt($aesKey, $rsaCipher, $publicKey, OPENSSL_PKCS1_OAEP_PADDING);
    $sendMe = $rsaCipher . $combined;
    
    var_dump(base64_encode($sendMe));
    
    ## DECRYPTION ##

    $rsaPart = mb_substr($sendMe, 0, 256, '8bit'); // Assuming 2048-bit RSA
    $aesPart = mb_substr($sendMe, 256, null, '8bit');
    $mac = mb_substr($aesPart, 0, 32, '8bit');
    $iv = mb_substr($aesPart, 32, 16, '8bit');
    $cipher = mb_substr($aesPart, 48, null, '8bit');

    $aesKey = '';
    openssl_private_decrypt($rsaPart, $aesKey, $privateKey, OPENSSL_PKCS1_OAEP_PADDING);
        $keyE = hash_hmac('sha256', 'Encryption Key', $aesKey, true);
        $keyA = hash_hmac('sha256', 'Authentication Key', $aesKey, true);

    $calc = hash_hmac('sha256', $iv . $cipher, $keyA, true);
    if (!hash_equals($calc, $mac)) {
        throw new Exception('MAC validation failure');
    }
    
    $decrypted = openssl_decrypt($cipher, 'aes-256-ctr', $keyE, OPENSSL_RAW_DATA, $iv);
    var_dump($decrypted); // string(19) "Prime Numbers Rock!"

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
7.1.7	0.007	0.003	17.26
7.1.6	0.011	0.011	19.90
7.1.5	0.007	0.007	17.02
7.1.0	0.000	0.147	22.67
7.0.20	0.021	0.009	14.75
7.0.7	0.100	0.160	20.22
7.0.6	0.073	0.150	20.32
7.0.5	0.070	0.107	20.72
7.0.4	0.080	0.190	20.57
7.0.3	0.070	0.117	20.76
7.0.2	0.067	0.097	20.63
7.0.1	0.070	0.180	20.47
7.0.0	0.067	0.103	20.53
5.6.28	0.003	0.070	20.94
5.6.22	0.067	0.077	20.73
5.6.21	0.063	0.063	20.65
5.6.20	0.067	0.063	21.11
5.6.19	0.067	0.053	21.03
5.6.18	0.080	0.047	21.17
5.6.17	0.060	0.063	21.03
5.6.16	0.067	0.060	21.09
5.6.15	0.073	0.077	21.18
5.6.14	0.063	0.070	21.02
5.6.13	0.077	0.073	21.18
5.6.12	0.013	0.067	21.11
5.6.11	0.033	0.063	21.00
5.6.10	0.063	0.063	21.15
5.6.9	0.070	0.060	20.99
5.6.8	0.060	0.060	20.56
5.6.7	0.060	0.053	20.48
5.6.6	0.070	0.043	20.38
5.6.5	0.060	0.060	20.39
5.6.4	0.067	0.060	20.56
5.6.3	0.077	0.070	20.39
5.6.2	0.063	0.063	20.38
5.6.1	0.063	0.053	20.50
5.6.0	0.060	0.057	20.37
5.5.36	0.053	0.060	20.51
5.5.35	0.057	0.067	20.43
5.5.34	0.057	0.063	20.85
5.5.33	0.067	0.063	20.80
5.5.32	0.067	0.060	20.87
5.5.31	0.053	0.060	20.96
5.5.30	0.063	0.060	20.87
5.5.29	0.083	0.077	20.90
5.5.28	0.010	0.067	20.96
5.5.27	0.063	0.067	20.99
5.5.26	0.063	0.063	20.86
5.5.25	0.070	0.060	20.64
5.5.24	0.060	0.063	20.34
5.5.23	0.070	0.067	20.28
5.5.22	0.057	0.060	20.16
5.5.21	0.053	0.060	20.34
5.5.20	0.073	0.047	20.23
5.5.19	0.060	0.063	20.18
5.5.18	0.067	0.050	20.18
5.5.16	0.057	0.057	20.19
5.5.15	0.057	0.057	20.32
5.5.14	0.070	0.043	20.30
5.5.13	0.063	0.057	20.19
5.5.12	0.057	0.060	20.27
5.5.11	0.070	0.047	20.21
5.5.10	0.063	0.053	20.25
5.5.9	0.067	0.053	19.98
5.5.8	0.060	0.053	20.14
5.5.7	0.057	0.057	20.21
5.5.6	0.070	0.043	20.13
5.5.5	0.067	0.047	20.09
5.5.4	0.057	0.053	20.13
5.5.3	0.063	0.073	20.00
5.5.2	0.063	0.050	20.12
5.5.1	0.073	0.067	20.16
5.5.0	0.077	0.073	20.12

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