Description:
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The openssl_seal and openssl_open cannot be used with cipher algorithms requiring IV (e.g. AES-128-CBC)

Test script:
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<?php
$data = "openssl_seal() test";
$cipher = 'AES-128-CBC';
// if in ext/openssl/tests
$pub_key = "file://" . dirname(__FILE__) . "/public.key";
$priv_key = "file://" . dirname(__FILE__) . "/private.key";

openssl_seal($data, $sealed, $ekeys, array($pub_key, $pub_key), $cipher, $iv);   
openssl_open($sealed, $decrypted, $ekeys[0], $priv_key, $cipher, $iv);
echo $decrypted;

Expected result:
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openssl_seal() test

Actual result:
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Warning that ciphers with IV are not supported.