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;
openssl_get_cipher_methods
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
openssl_get_cipher_methods — Gets available cipher methods
Beschreibung
Gets a list of available cipher methods.
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
)
add a note
User Contributed Notes 1 note
karel dot wintersky at gmail dot com ¶
7 years ago
