OPENSSL_LOAD_BUILTIN_MODULES(3ossl)

📦 version 3.5.0, in opensuse-leap 16.0

💅 OPENSSL_LOAD_BUILTIN_MODULES 💅

Okay so bestie, this is the tea on OPENSSL_LOAD_BUILTIN_MODULES(3ossl) from the OpenSSL fam — it's literally all about adding the standard configuration modules, and I'm obsessed. Let me break it down for you, no cap. ✨

🌸 SYNOPSIS 🌸

#include <openssl/conf.h>

void OPENSSL_load_builtin_modules(void);
void ASN1_add_oid_module(void);
void ENGINE_add_conf_module(void);

Three little functions, three big vibes. Periodt. 🎀

🦋 DESCRIPTION 🦋

So like, OPENSSL_load_builtin_modules() is the main character here — it adds all the standard OpenSSL configuration modules to the internal list. Once they're in there, the OpenSSL configuration code can use them. Slay. 💅

Then we got ASN1_add_oid_module() — this one's lowkey specific, it adds just the ASN1 OBJECT module. Just that one. No extras. 🧚

And ENGINE_add_conf_module()? Yeah, that one adds just the ENGINE configuration module. Selective queen. 👑

💖 NOTES 💖

Okay so important stuff, listen up:

  • If you call the simple configuration function OPENSSL_config(), then OPENSSL_load_builtin_modules() gets called automatically. So like, it's handled for you, iykyk. 🫶
  • But if your application uses the configuration functions directly, you're gonna need to call OPENSSL_load_builtin_modules() yourself — before any other configuration code. Don't skip this step bestie, fr fr. 😭
  • And here's the big one: applications should call OPENSSL_load_builtin_modules() to load all the configuration modules instead of adding modules selectively. Otherwise? Functionality might be missing from your application if and when new modules get added. The way that selective loading can literally leave you missing stuff later is giving risky behavior. 💀 So just load 'em all. No cap.

🌈 RETURN VALUES 🌈

None of these functions return a value. Not a one. Zero. Nada. They're void, babe. ✨

🍓 SEE ALSO 🍓

Go read those too, bestie. Knowledge is power. 💜

⭐ HISTORY ⭐

So ENGINE_add_conf_module()? It was deprecated in OpenSSL 3.0. Like, it's still there but it's giving "old news" energy. Just so you know. 🙈

Copyright 2004-2020 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

Okay that's the whole page bestie, you're officially educated on builtin modules 💖 This was OpenSSL 3.5.0, dated 2026-09-2 — go slay your config game, mwah! 🎀✨

📦 where this page comes from