Fix OpenSSL fetching of alias ciphers

This does not seem like an issue as the aliases seem to be already
fetched most of the time. But there might be cases when it could be
failing like it was failing for MD in phpGH-19369.

It should be noted that the test does not fail without this change but
it seems useful anyway so it is added as part of this change. I
actually have not found the case where alias is not fetched for cipher
but there might be some.

Closes phpGH-19437

Author: bukka

ext/openssl/openssl_backend_v3.c

@@ -775,6 +775,12 @@ static const char *php_openssl_cipher_names[] = {
 
 const EVP_CIPHER *php_openssl_get_evp_cipher_by_name(const char *name)
 {
+	const EVP_CIPHER *cp = (const EVP_CIPHER *) OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
+
+	if (cp != NULL) {
+		return cp;
+	}
+
 	return EVP_CIPHER_fetch(PHP_OPENSSL_LIBCTX, name, PHP_OPENSSL_PROPQ);
 }
 

ext/openssl/tests/openssl_encrypt_cbc.phpt

@@ -0,0 +1,12 @@
+--TEST--
+openssl_encrypt() CBC and its alias
+--EXTENSIONS--
+openssl
+--FILE--
+<?php
+var_dump(bin2hex(openssl_encrypt('data', 'AES-128-CBC', 'foo', 0, '0123456789abcdef')));
+var_dump(bin2hex(openssl_encrypt('data', 'aes128', 'foo', 0, '0123456789abcdef')));
+?>
+--EXPECTF--
+string(48) "7a654459353452676f6c6b6a446b75455a6c4c6b4f513d3d"
+string(48) "7a654459353452676f6c6b6a446b75455a6c4c6b4f513d3d"