xref: /openssl/doc/man7/ct.pod (revision 6f8b858d)
1=pod
2
3=head1 NAME
4
5ct - Certificate Transparency
6
7=head1 SYNOPSIS
8
9 #include <openssl/ct.h>
10
11=head1 DESCRIPTION
12
13This library implements Certificate Transparency (CT) verification for TLS
14clients, as defined in RFC 6962. This verification can provide some confidence
15that a certificate has been publicly logged in a set of CT logs.
16
17By default, these checks are disabled. They can be enabled using
18L<SSL_CTX_enable_ct(3)> or L<SSL_enable_ct(3)>.
19
20This library can also be used to parse and examine CT data structures, such as
21Signed Certificate Timestamps (SCTs), or to read a list of CT logs. There are
22functions for:
23- decoding and encoding SCTs in DER and TLS wire format.
24- printing SCTs.
25- verifying the authenticity of SCTs.
26- loading a CT log list from a CONF file.
27
28=head1 SEE ALSO
29
30L<d2i_SCT_LIST(3)>,
31L<CTLOG_STORE_new(3)>,
32L<CTLOG_STORE_get0_log_by_id(3)>,
33L<SCT_new(3)>,
34L<SCT_print(3)>,
35L<SCT_validate(3)>,
36L<SCT_validate(3)>,
37L<CT_POLICY_EVAL_CTX_new(3)>,
38L<SSL_CTX_set_ct_validation_callback(3)>
39
40=head1 HISTORY
41
42The ct library was added in OpenSSL 1.1.0.
43
44=head1 COPYRIGHT
45
46Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
47
48Licensed under the Apache License 2.0 (the "License").  You may not use
49this file except in compliance with the License.  You can obtain a copy
50in the file LICENSE in the source distribution or at
51L<https://www.openssl.org/source/license.html>.
52
53=cut
54