SSL_CTX_SET_CTLOG_LIST_FILE(3ossl)

📦 version 3.5.0, in opensuse-leap 16.0

💅 SSL_CTX_SET_CTLOG_LIST_FILE(3ossl) — the OpenSSL manual, bestie edition

okay so you're deep in OpenSSL land (iconic of you) and this page lives in the 3ossl manual, which is basically the group chat where all the OpenSSL 3 functions hang out. Let's get into it 🫶

✨ NAME ✨

SSL_CTX_set_default_ctlog_list_file, SSL_CTX_set_ctlog_list_file — the two besties that load a Certificate Transparency log list from a file 💖

🌸 SYNOPSIS 🌸

#include <openssl/ssl.h>

int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx);
int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path);

look at them, so tidy, so demure 🎀

🦋 DESCRIPTION 🦋

okay so here's the tea, fr fr:

  • SSL_CTX_set_default_ctlog_list_file() loads a list of Certificate Transparency (CT) logs from the default file location. And where's that? It's "ct_log_list.cnf", sitting in the directory where OpenSSL is installed. no cap, that's just where it lives 🏠
  • SSL_CTX_set_ctlog_list_file() is the same vibe but you get to pick the spot — it loads a list of CT logs from a specific path. want the file format deets? go look at CTLOG_STORE_new(3), they explain it there 👑

🌈 NOTES 🌈

⚠️ read this bit, it's giving "important":
  • These functions will not clear the existing CT log list — it gets appended to. So if you were hoping for a clean slate, nope, sorry bestie. To replace the existing list, use SSL_CTX_set0_ctlog_store(3) first. that's the move 💅
  • If an error occurs whilst parsing a particular log entry in the file, that log entry will just be skipped. one bad entry doesn't have to ruin the whole file, we love a resilient queen ✨

⭐ RETURN VALUES ⭐

  • SSL_CTX_set_default_ctlog_list_file() and SSL_CTX_set_ctlog_list_file() return 1 if the log list is successfully loaded 🎉
  • they return 0 if an error occurs 😭
  • and heads up: in the case of an error, the log list may have been partially loaded. so like, half the vibes made it in, the other half did not 🙈

🎀 SEE ALSO 🎀

go read those too, iykyk 📚

Copyright 2016 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>.

and that's the whole page, bestie! this absolute classic dropped as version 3.5.0, dated 2026-09-25, under the SSL_CTX_SET_CTLOG_LIST_FILE(3ossl) banner — main character energy from start to finish, periodt 💜🔥

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