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openssl_get_cipher_methods

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

openssl_get_cipher_methods — Kullanılabilecek şifreleme yöntemlerini döndürür

Açıklama

openssl_get_cipher_methods(bool $rumuzlar = false): array

Kullanılabilecek şifreleme yöntemlerini döndürür.

Bağımsız Değişkenler

rumuzlar: Şifre rumuzları dönen diziye dahil edilecekse true olmalıdır.

Dönen Değerler

OpenSSL 1.1.1 öncesinde şifreleme yöntemlerini içeren dizi büyük ve küçük harfli olabiliyordu. OpenSSL 1.1.1 ve sonrasında sadece küçük harfli dizgeler dönüyor.

Örnekler

Örnek 1 - openssl_get_cipher_methods() örneği

Kullanılabilecek şifreleme yöntemlerini ve varsa rumuzlarını listeler.

<?php
$şifreler             = openssl_get_cipher_methods();
$şifreler_ve_rumuzlar = openssl_get_cipher_methods(true);
$rumuzlar             = array_diff($şifreler_ve_rumuzlar, $şifreler);

//ECB kipinden kaçınılmalı
$şifreler = array_filter( $ciphers, function($n) { return stripos($n,"ecb")===FALSE; } );

//Aug 2016'ya kadar, Openssl için zayıf olanlar: RC2, RC4, DES, 3DES, MD5 tabanlı
$şifreler = array_filter( $şifreler, function($c) { return stripos($c,"des")===FALSE; } );
$şifreler = array_filter( $şifreler, function($c) { return stripos($c,"rc2")===FALSE; } );
$şifreler = array_filter( $şifreler, function($c) { return stripos($c,"rc4")===FALSE; } );
$şifreler = array_filter( $şifreler, function($c) { return stripos($c,"md5")===FALSE; } );
$rumuzlar = array_filter($rumuzlar,function($c) { return stripos($c,"des")===FALSE; } );
$rumuzlar = array_filter($rumuzlar,function($c) { return stripos($c,"rc2")===FALSE; } );

print_r($şifreler);
print_r($rumuzlar);

?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

Array
(
    [0] => aes-128-cbc
    [1] => aes-128-cbc-hmac-sha1
    [2] => aes-128-cbc-hmac-sha256
    [3] => aes-128-ccm
    [4] => aes-128-cfb
    [5] => aes-128-cfb1
    [6] => aes-128-cfb8
    [7] => aes-128-ctr
    [9] => aes-128-gcm
    [10] => aes-128-ocb
    [11] => aes-128-ofb
    [12] => aes-128-xts
    [13] => aes-192-cbc
    [14] => aes-192-ccm
    [15] => aes-192-cfb
    [16] => aes-192-cfb1
    [17] => aes-192-cfb8
    [18] => aes-192-ctr
    [20] => aes-192-gcm
    [21] => aes-192-ocb
    [22] => aes-192-ofb
    [23] => aes-256-cbc
    [24] => aes-256-cbc-hmac-sha1
    [25] => aes-256-cbc-hmac-sha256
    [26] => aes-256-ccm
    [27] => aes-256-cfb
    [28] => aes-256-cfb1
    [29] => aes-256-cfb8
    [30] => aes-256-ctr
    [32] => aes-256-gcm
    [33] => aes-256-ocb
    [34] => aes-256-ofb
    [35] => aes-256-xts
    [36] => aria-128-cbc
    [37] => aria-128-ccm
    [38] => aria-128-cfb
    [39] => aria-128-cfb1
    [40] => aria-128-cfb8
    [41] => aria-128-ctr
    [43] => aria-128-gcm
    [44] => aria-128-ofb
    [45] => aria-192-cbc
    [46] => aria-192-ccm
    [47] => aria-192-cfb
    [48] => aria-192-cfb1
    [49] => aria-192-cfb8
    [50] => aria-192-ctr
    [52] => aria-192-gcm
    [53] => aria-192-ofb
    [54] => aria-256-cbc
    [55] => aria-256-ccm
    [56] => aria-256-cfb
    [57] => aria-256-cfb1
    [58] => aria-256-cfb8
    [59] => aria-256-ctr
    [61] => aria-256-gcm
    [62] => aria-256-ofb
    [63] => bf-cbc
    [64] => bf-cfb
    [66] => bf-ofb
    [67] => camellia-128-cbc
    [68] => camellia-128-cfb
    [69] => camellia-128-cfb1
    [70] => camellia-128-cfb8
    [71] => camellia-128-ctr
    [73] => camellia-128-ofb
    [74] => camellia-192-cbc
    [75] => camellia-192-cfb
    [76] => camellia-192-cfb1
    [77] => camellia-192-cfb8
    [78] => camellia-192-ctr
    [80] => camellia-192-ofb
    [81] => camellia-256-cbc
    [82] => camellia-256-cfb
    [83] => camellia-256-cfb1
    [84] => camellia-256-cfb8
    [85] => camellia-256-ctr
    [87] => camellia-256-ofb
    [88] => cast5-cbc
    [89] => cast5-cfb
    [91] => cast5-ofb
    [92] => chacha20
    [93] => chacha20-poly1305
    [111] => id-aes128-CCM
    [112] => id-aes128-GCM
    [113] => id-aes128-wrap
    [114] => id-aes128-wrap-pad
    [115] => id-aes192-CCM
    [116] => id-aes192-GCM
    [117] => id-aes192-wrap
    [118] => id-aes192-wrap-pad
    [119] => id-aes256-CCM
    [120] => id-aes256-GCM
    [121] => id-aes256-wrap
    [122] => id-aes256-wrap-pad
    [124] => idea-cbc
    [125] => idea-cfb
    [127] => idea-ofb
    [137] => seed-cbc
    [138] => seed-cfb
    [140] => seed-ofb
    [141] => sm4-cbc
    [142] => sm4-cfb
    [143] => sm4-ctr
    [145] => sm4-ofb
)
Array
(
    [36] => aes128
    [37] => aes128-wrap
    [38] => aes192
    [39] => aes192-wrap
    [40] => aes256
    [41] => aes256-wrap
    [69] => aria128
    [70] => aria192
    [71] => aria256
    [72] => bf
    [77] => blowfish
    [99] => camellia128
    [100] => camellia192
    [101] => camellia256
    [102] => cast
    [103] => cast-cbc
    [146] => idea
    [164] => seed
    [169] => sm4
)

Ayrıca Bakınız

openssl_get_md_methods() - Kullanılabilecek özet yöntemlerini döndürür

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User Contributed Notes 1 note

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karel dot wintersky at gmail dot com ¶

7 years ago


May be useful for cyphers execution speed.

<?php

const TEST_COUNT = 100000;
const SOURCE = 'Note that HTML tags are not allowed in the posts, but the note formatting is preserved.';
const KEY = "password";

function TESTER( $testing_function, $argument )
{
    $t = microtime(true);

    for ($test_iterator = 0; $test_iterator < TEST_COUNT; $test_iterator++) {
        $testing_function( $argument );
    }
    return round(microtime(true) - $t, 4);
}

$crypt = function($cipher) {
    $ivlen = openssl_cipher_iv_length($cipher);
    $iv = openssl_random_pseudo_bytes($ivlen);
    openssl_encrypt(SOURCE, $cipher, KEY, $options=0, $iv);
};

$methods = openssl_get_cipher_methods(false);

array_splice( $methods, 0, count($methods) / 2);

$timings = array();

foreach ($methods as $cypher) {
    $time = TESTER( $crypt, $cypher );
    $timings[ $cypher ] = $time;
    echo str_pad($cypher, 40, ' ', STR_PAD_LEFT), " have time  ", str_pad($time, 8, STR_PAD_LEFT), ' seconds. ', PHP_EOL;
}

uasort($timings, function($a, $b){
    return $a <=> $b;
});

$min_time = round(reset($timings) / TEST_COUNT, 7);
$min_cypher = key($timings);

$max_time = round(end($timings) / TEST_COUNT, 7);
$max_cypher = key($timings);

echo '-------------', PHP_EOL;
echo "Total tests: ", count($timings), PHP_EOL;
echo "Max timing : {$max_time} seconds for `{$max_cypher}` algorithm.", PHP_EOL;
echo "Min timing : {$min_time} seconds for `{$min_cypher}` algorithm.", PHP_EOL;

echo 'Details: ', PHP_EOL;

foreach ($timings as $m => $t) {
    echo '- ', str_pad($t, 8, STR_PAD_LEFT), " seconds for `{$m}`",  PHP_EOL;
}

echo PHP_EOL;

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