=pod
=head1 NAME
SSL_load_client_CA_file,
SSL_add_file_cert_subjects_to_stack,
SSL_add_dir_cert_subjects_to_stack
- load certificate names
=head1 SYNOPSIS
#include <openssl/ssl.h>
STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
const char *file)
int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
const char *dir)
=head1 DESCRIPTION
SSL_load_client_CA_file() reads certificates from I<file> and returns
a STACK_OF(X509_NAME) with the subject names found.
SSL_add_file_cert_subjects_to_stack() reads certificates from I<file>,
and adds their subject name to the already existing I<stack>.
SSL_add_dir_cert_subjects_to_stack() reads certificates from every
file in the directory I<dir>, and adds their subject name to the
already existing I<stack>.
=head1 NOTES
SSL_load_client_CA_file() reads a file of PEM formatted certificates and
extracts the X509_NAMES of the certificates found. While the name suggests
the specific usage as support function for
L<SSL_CTX_set_client_CA_list(3)>,
it is not limited to CA certificates.
=head1 RETURN VALUES
The following return values can occur:
=over 4
=item NULL
The operation failed, check out the error stack for the reason.
=item Pointer to STACK_OF(X509_NAME)
Pointer to the subject names of the successfully read certificates.
=back
=head1 EXAMPLES
Load names of CAs from file and use it as a client CA list:
SSL_CTX *ctx;
STACK_OF(X509_NAME) *cert_names;
...
cert_names = SSL_load_client_CA_file("/path/to/CAfile.pem");
if (cert_names != NULL)
SSL_CTX_set_client_CA_list(ctx, cert_names);
else
/* error */
...
=head1 SEE ALSO
L<ssl(7)>,
L<SSL_CTX_set_client_CA_list(3)>
=head1 COPYRIGHT
Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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
L<https://www.openssl.org/source/license.html>.
=cut