SSL_CTX_set_default_ctlog_list_file, SSL_CTX_set_ctlog_list_file - load a Certificate Transparency log list from a file

#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);

SSL_CTX_set_default_ctlog_list_file() loads a list of Certificate Transparency (CT) logs from the default file location, "ct_log_list.cnf", found in the directory where OpenSSL is installed.

SSL_CTX_set_ctlog_list_file() loads a list of CT logs from a specific path. See CTLOG_STORE_new(3) for the file format.

These functions will not clear the existing CT log list - it will be appended to. To replace the existing list, use SSL_CTX_set0_ctlog_store(3) first.

If an error occurs whilst parsing a particular log entry in the file, that log entry will be skipped.

SSL_CTX_set_default_ctlog_list_file() and SSL_CTX_set_ctlog_list_file() return 1 if the log list is successfully loaded, and 0 if an error occurs. In the case of an error, the log list may have been partially loaded.

ssl(7), SSL_CTX_set_ct_validation_callback(3), CTLOG_STORE_new(3)

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

2022-11-01 3.0.7