Fix GH-19369: openssl_sign() - support for alias digest algs broken

Closes GH-19436

NEWS

@@ -20,6 +20,10 @@ PHP                                                                        NEWS
 - MySQLi:
   . The mysqli_execute() alias function has been deprecated. (timwolla)
 
+- OpenSSL:
+  . Fixed bug GH-19369 (8.5 | Regression in openssl_sign() - support for alias
+    algorithms appears to be broken). (Jakub Zelenka)
+
 - PDO:
   . The "uri:" DSN scheme has been deprecated due to security concerns with
     DSNs coming from remote URIs. (timwolla)

ext/openssl/openssl_backend_v3.c

@@ -713,6 +713,12 @@ zend_string *php_openssl_dh_compute_key(EVP_PKEY *pkey, char *pub_str, size_t pu
 
 const EVP_MD *php_openssl_get_evp_md_by_name(const char *name)
 {
+	const EVP_MD *dp = (const EVP_MD *) OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
+
+	if (dp != NULL) {
+		return dp;
+	}
+
 	return EVP_MD_fetch(PHP_OPENSSL_LIBCTX, name, PHP_OPENSSL_PROPQ);
 }
 

ext/openssl/tests/gh19369.phpt

@@ -0,0 +1,24 @@
+--TEST--
+GH-19369: openssl_sign with alias algorithms
+--EXTENSIONS--
+openssl
+--SKIPIF--
+<?php
+if (!in_array('sha256WithRSAEncryption', openssl_get_md_methods(true))) {
+    die('skip sha256WithRSAEncryption alias not present');
+}
+?>
+--FILE--
+<?php
+$digests             = openssl_get_md_methods();
+$digests_and_aliases = openssl_get_md_methods(true);
+$digest_aliases      = array_diff($digests_and_aliases, $digests);
+
+$data = "Testing openssl_sign() with alias algorithm";
+$privkey = "file://" . __DIR__ . "/private_rsa_1024.key";
+
+var_dump(openssl_sign($data, $sign, $privkey, 'sha256WithRSAEncryption'));
+
+?>
+--EXPECT--
+bool(true)