1X509_CHECK_CA(3)                    OpenSSL                   X509_CHECK_CA(3)
2
3
4

NAME

6       X509_check_ca - check if given certificate is CA certificate
7

SYNOPSIS

9        #include <openssl/x509v3.h>
10
11        int X509_check_ca(X509 *cert);
12

DESCRIPTION

14       This function checks if given certificate is CA certificate (can be
15       used to sign other certificates).
16

RETURN VALUES

18       Function return 0, if it is not CA certificate, 1 if it is proper
19       X509v3 CA certificate with basicConstraints extension CA:TRUE, 3, if it
20       is self-signed X509 v1 certificate, 4, if it is certificate with
21       keyUsage extension with bit keyCertSign set, but without
22       basicConstraints, and 5 if it has outdated Netscape Certificate Type
23       extension telling that it is CA certificate.
24
25       Actually, any nonzero value means that this certificate could have been
26       used to sign other certificates.
27

SEE ALSO

29       X509_verify_cert(3), X509_check_issued(3), X509_check_purpose(3)
30

32       Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
33
34       Licensed under the OpenSSL license (the "License").  You may not use
35       this file except in compliance with the License.  You can obtain a copy
36       in the file LICENSE in the source distribution or at
37       <https://www.openssl.org/source/license.html>.
38
39
40
411.1.1i                            2021-07-22                  X509_CHECK_CA(3)
Impressum