add test for libargon2/openssl compat check

Author: remicollet

ext/openssl/tests/openssl_password_compat.phpt

@@ -1,5 +1,5 @@
 --TEST--
-Compatibility of password_hash
+Compatibility of password_hash (libsodium / openssl)
 --EXTENSIONS--
 openssl
 sodium

ext/openssl/tests/openssl_password_compat2.phpt

@@ -0,0 +1,52 @@
+--TEST--
+Compatibility of password_hash (libargon2 / openssl)
+--EXTENSIONS--
+openssl
+sodium
+--SKIPIF--
+<?php
+if (PASSWORD_ARGON2_PROVIDER != "standard") {
+  echo "skip - libargon2 not available";
+}
+
+if (!function_exists('openssl_password_hash')) {
+  echo "skip - No crypto_pwhash_str_verify";
+}
+?>
+--FILE--
+<?php
+
+echo 'Argon2 provider: ';
+var_dump(PASSWORD_ARGON2_PROVIDER);
+
+foreach([1, 2] as $mem) {
+  foreach([1, 2] as $time) {
+    $opts = [
+      'memory_cost' => PASSWORD_ARGON2_DEFAULT_MEMORY_COST / $mem,
+      'time_cost'   => PASSWORD_ARGON2_DEFAULT_TIME_COST / $time,
+      'threads'     => PASSWORD_ARGON2_DEFAULT_THREADS,
+    ];
+    $algo = 'argon2id';
+    $pass = "secret$mem$time$algo";
+
+    /* hash with libargon2 / verify with openssl */
+    $hash = password_hash($pass, PASSWORD_ARGON2ID, $opts);
+    var_dump(openssl_password_verify($algo, $pass, $hash));
+
+    /* hash with openssl / verify with libargon2 */
+    $hash = openssl_password_hash($algo, $pass, $opts);
+    var_dump(password_verify($pass, $hash));
+  }
+}
+?>
+--EXPECT--
+Argon2 provider: string(8) "standard"
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+