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=pod
=head1 NAME
SSL_load_client_CA_file - load certificate names from file
=head1 SYNOPSIS
#include <openssl/ssl.h>
STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
=head1 DESCRIPTION
SSL_load_client_CA_file() reads certificates from B<file> and returns
a STACK_OF(X509_NAME) with the subject names found.
=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 2000-2016 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
L<https://www.openssl.org/source/license.html>.
=cut
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