Add ffdhe groups to trace output
[openssl.git] / doc / man3 / X509_check_issued.pod
1 =pod
2
3 =head1 NAME
4
5 X509_check_issued - checks if certificate is issued by another
6 certificate
7
8 =head1 SYNOPSIS
9
10  #include <openssl/x509v3.h>
11
12  int X509_check_issued(X509 *issuer, X509 *subject);
13
14
15 =head1 DESCRIPTION
16
17 This function checks if certificate I<subject> was issued using CA
18 certificate I<issuer>. This function takes into account not only
19 matching of issuer field of I<subject> with subject field of I<issuer>,
20 but also compares B<authorityKeyIdentifier> extension of I<subject> with
21 B<subjectKeyIdentifier> of I<issuer> if B<authorityKeyIdentifier>
22 present in the I<subject> certificate and checks B<keyUsage> field of
23 I<issuer>.
24
25 =head1 RETURN VALUE
26
27 Function return B<X509_V_OK> if certificate I<subject> is issued by
28 I<issuer> or some B<X509_V_ERR*> constant to indicate an error.
29
30 =head1 SEE ALSO
31
32 L<X509_verify_cert(3)>,
33 L<X509_check_ca(3)>,
34 L<verify(1)>
35
36 =head1 COPYRIGHT
37
38 Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
39
40 Licensed under the OpenSSL license (the "License").  You may not use
41 this file except in compliance with the License.  You can obtain a copy
42 in the file LICENSE in the source distribution or at
43 L<https://www.openssl.org/source/license.html>.
44
45 =cut