openssl_get_cipher_methods

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

openssl_get_cipher_methods — Gets available cipher methods

Beschreibung

openssl_get_cipher_methods(bool $aliases = false): array

Gets a list of available cipher methods.

Parameter-Liste

aliases: Set to true if cipher aliases should be included within the returned array.

Rückgabewerte

An array of available cipher methods. Note that prior to OpenSSL 1.1.1, the cipher methods have been returned in upper case and lower case spelling; as of OpenSSL 1.1.1 only the lower case variants are returned.

Beispiele

Beispiel #1 openssl_get_cipher_methods() example

Shows how the available ciphers might look, and also which aliases might be available.


<?php
$ciphers             = openssl_get_cipher_methods();
$ciphers_and_aliases = openssl_get_cipher_methods(true);
$cipher_aliases      = array_diff($ciphers_and_aliases, $ciphers);

//ECB mode should be avoided
$ciphers = array_filter( $ciphers, function($n) { return stripos($n,"ecb")===FALSE; } );

//At least as early as Aug 2016, Openssl declared the following weak: RC2, RC4, DES, 3DES, MD5 based
$ciphers = array_filter( $ciphers, function($c) { return stripos($c,"des")===FALSE; } );
$ciphers = array_filter( $ciphers, function($c) { return stripos($c,"rc2")===FALSE; } );
$ciphers = array_filter( $ciphers, function($c) { return stripos($c,"rc4")===FALSE; } );
$ciphers = array_filter( $ciphers, function($c) { return stripos($c,"md5")===FALSE; } );
$cipher_aliases = array_filter($cipher_aliases,function($c) { return stripos($c,"des")===FALSE; } );
$cipher_aliases = array_filter($cipher_aliases,function($c) { return stripos($c,"rc2")===FALSE; } );

print_r($ciphers);
print_r($cipher_aliases);
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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
)