SSL_CTX_set_client_CA_list.pod revision 76866
1=pod 2 3=head1 NAME 4 5SSL_CTX_set_client_CA_list, SSL_set_client_CA_list, SSL_CTX_add_client_CA, 6SSL_add_client_CA - set list of CAs sent to the client when requesting a 7client certificate 8 9=head1 SYNOPSIS 10 11 #include <openssl/ssl.h> 12 13 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *list); 14 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *list); 15 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *cacert); 16 int SSL_add_client_CA(SSL *ssl, X509 *cacert); 17 18=head1 DESCRIPTION 19 20SSL_CTX_set_client_CA_list() sets the B<list> of CAs sent to the client when 21requesting a client certificate for B<ctx>. 22 23SSL_set_client_CA_list() sets the B<list> of CAs sent to the client when 24requesting a client certificate for the chosen B<ssl>, overriding the 25setting valid for B<ssl>'s SSL_CTX object. 26 27SSL_CTX_add_client_CA() adds the CA name extracted from B<cacert> to the 28list of CAs sent to the client when requesting a client certificate for 29B<ctx>. 30 31SSL_add_client_CA() adds the CA name extracted from B<cacert> to the 32list of CAs sent to the client when requesting a client certificate for 33the chosen B<ssl>, overriding the setting valid for B<ssl>'s SSL_CTX object. 34 35=head1 NOTES 36 37When a TLS/SSL server requests a client certificate (see 38B<SSL_CTX_set_verify_options()>), it sends a list of CAs, for which 39it will accept certificates, to the client. If no special list is provided, 40the CAs available using the B<CAfile> option in 41L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)> 42are sent. 43 44This list can be explicitly set using the SSL_CTX_set_client_CA_list() for 45B<ctx> and SSL_set_client_CA_list() for the specific B<ssl>. The list 46specified overrides the previous setting. The CAs listed do not become 47trusted (B<list> only contains the names, not the complete certificates); use 48L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)> 49to additionally load them for verification. 50 51SSL_CTX_add_client_CA() and SSL_add_client_CA() can be used to add additional 52items the list of client CAs. If no list was specified before using 53SSL_CTX_set_client_CA_list() or SSL_set_client_CA_list(), a new client 54CA list for B<ctx> or B<ssl> (as appropriate) is opened. The CAs implicitly 55specified using 56L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)> 57are no longer used automatically. 58 59These functions are only useful for TLS/SSL servers. 60 61=head1 RETURN VALUES 62 63SSL_CTX_set_client_CA_list() and SSL_set_client_CA_list() do not return 64diagnostic information. 65 66SSL_CTX_add_client_CA() and SSL_add_client_CA() have the following return 67values: 68 69=over 4 70 71=item 1 72 73The operation succeeded. 74 75=item 0 76 77A failure while manipulating the STACK_OF(X509_NAME) object occurred or 78the X509_NAME could not be extracted from B<cacert>. Check the error stack 79to find out the reason. 80 81=back 82 83=head1 SEE ALSO 84 85L<ssl(3)|ssl(3)>, 86L<SSL_get_client_CA_list(3)|SSL_get_client_CA_list(3)>, 87L<SSL_load_client_CA_file(3)|SSL_load_client_CA_file(3)> 88L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)> 89 90=cut 91