ext-openssl is inconsistent in cipher algorithm accepted in functions vs the ones returned by openssl_get_cipher_methods #19994
Description
Description
The following code:
<?php
$ciphers = openssl_get_cipher_methods();
foreach ($ciphers as $cipher) {
echo $cipher.': ';
echo openssl_cipher_iv_length($cipher);
echo "\n";
}Resulted in this output:
aes-128-cbc: 16
aes-128-cbc-cts: PHP Warning: openssl_cipher_iv_length(): Unknown cipher algorithm in /home/stof/src/Incenteev/Incenteev/build/tmp.php on line 15
PHP Stack trace:
PHP 1. {main}() /home/stof/src/Incenteev/Incenteev/build/tmp.php:0
PHP 2. openssl_cipher_iv_length($cipher_algo = 'aes-128-cbc-cts') /home/stof/src/Incenteev/Incenteev/build/tmp.php:7
aes-128-cbc-hmac-sha1: 16
aes-128-cbc-hmac-sha256: 16
aes-128-ccm: 12
aes-128-cfb: 16
aes-128-cfb1: 16
aes-128-cfb8: 16
aes-128-ctr: 16
aes-128-ecb: 0
aes-128-gcm: 12
aes-128-ocb: 12
aes-128-ofb: 16
aes-128-siv: PHP Warning: openssl_cipher_iv_length(): Unknown cipher algorithm in /home/stof/src/Incenteev/Incenteev/build/tmp.php on line 15
PHP Stack trace:
PHP 1. {main}() /home/stof/src/Incenteev/Incenteev/build/tmp.php:0
PHP 2. openssl_cipher_iv_length($cipher_algo = 'aes-128-siv') /home/stof/src/Incenteev/Incenteev/build/tmp.php:7
[REDACTED: more algorithms]
But I expected this output instead: no warnings about unknown algorithms, as I'm using the list of known algorithms as input.
PHP Version
PHP 8.3.25 (cli) (built: Aug 29 2025 12:01:53) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.3.25, Copyright (c) Zend Technologies
with Zend OPcache v8.3.25, Copyright (c), by Zend Technologies
with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans
with blackfire v1.92.44~linux-x64-non_zts83, https://blackfire.io, by Blackfire
In case this is relevant, I'm using OpenSSL 3.0.13
Operating System
Ubuntu 24.04