1=pod 2 3=head1 NAME 4 5SSL_load_client_CA_file, 6SSL_add_file_cert_subjects_to_stack, 7SSL_add_dir_cert_subjects_to_stack 8- load certificate names 9 10=head1 SYNOPSIS 11 12 #include <openssl/ssl.h> 13 14 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file); 15 16 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 17 const char *file) 18 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 19 const char *dir) 20 21=head1 DESCRIPTION 22 23SSL_load_client_CA_file() reads certificates from I<file> and returns 24a STACK_OF(X509_NAME) with the subject names found. 25 26SSL_add_file_cert_subjects_to_stack() reads certificates from I<file>, 27and adds their subject name to the already existing I<stack>. 28 29SSL_add_dir_cert_subjects_to_stack() reads certificates from every 30file in the directory I<dir>, and adds their subject name to the 31already existing I<stack>. 32 33=head1 NOTES 34 35SSL_load_client_CA_file() reads a file of PEM formatted certificates and 36extracts the X509_NAMES of the certificates found. While the name suggests 37the specific usage as support function for 38L<SSL_CTX_set_client_CA_list(3)>, 39it is not limited to CA certificates. 40 41=head1 RETURN VALUES 42 43The following return values can occur: 44 45=over 4 46 47=item NULL 48 49The operation failed, check out the error stack for the reason. 50 51=item Pointer to STACK_OF(X509_NAME) 52 53Pointer to the subject names of the successfully read certificates. 54 55=back 56 57=head1 EXAMPLES 58 59Load names of CAs from file and use it as a client CA list: 60 61 SSL_CTX *ctx; 62 STACK_OF(X509_NAME) *cert_names; 63 64 ... 65 cert_names = SSL_load_client_CA_file("/path/to/CAfile.pem"); 66 if (cert_names != NULL) 67 SSL_CTX_set_client_CA_list(ctx, cert_names); 68 else 69 /* error */ 70 ... 71 72=head1 SEE ALSO 73 74L<ssl(7)>, 75L<SSL_CTX_set_client_CA_list(3)> 76 77=head1 COPYRIGHT 78 79Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved. 80 81Licensed under the OpenSSL license (the "License"). You may not use 82this file except in compliance with the License. You can obtain a copy 83in the file LICENSE in the source distribution or at 84L<https://www.openssl.org/source/license.html>. 85 86=cut 87