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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)|SSL_CTX_set_client_CA_list(3)>,
it is not limited to CA certificates.
=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_handling();
...
=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 SEE ALSO
L<ssl(3)|ssl(3)>,
L<SSL_CTX_set_client_CA_list(3)|SSL_CTX_set_client_CA_list(3)>
=cut
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