(PHP 5 >= 5.3.0, PHP 7, PHP 8)
openssl_get_cipher_methods — Obtiene la lista de métodos de cifrado disponibles
Obtiene la lista de métodos de cifrado disponibles.
aliases
Pásese true si se desea que los alias de los métodos de cifrado
sean incluidos en el array devuelto.
Un array de los métodos de cifrado disponibles. Cabe señalar que antes de OpenSSL 1.1.1, los métodos de cifrado se devolvían en mayúsculas y minúsculas; a partir de OpenSSL 1.1.1 solo se devuelve la variante en minúsculas.
Ejemplo #1 Ejemplo openssl_get_cipher_methods()
Muestra cómo son los ciphers disponibles, así como los alias disponibles.
<?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);
?>Resultado del ejemplo anterior es similar a :
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
)