/usr/man/cat.3/SSL_set_client_CA_list.3

SSL_CTX_set_client_CA_list(3)OpenSSLSSL_CTX_set_client_CA_list(3)

NAME

     SSL_CTX_set_client_CA_list, SSL_set_client_CA_list,
     SSL_CTX_add_client_CA, SSL_add_client_CA - set list of CAs
     sent to the client when requesting a client certificate

SYNOPSIS

      #include <openssl/ssl.h>

      void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *list);
      void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *list);
      int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *cacert);
      int SSL_add_client_CA(SSL *ssl, X509 *cacert);

DESCRIPTION

     SSL_CTX_set_client_CA_list() sets the list of CAs sent to
     the client when requesting a client certificate for ctx.

     SSL_set_client_CA_list() sets the list of CAs sent to the
     client when requesting a client certificate for the chosen
     ssl, overriding the setting valid for ssl's SSL_CTX object.

     SSL_CTX_add_client_CA() adds the CA name extracted from
     cacert to the list of CAs sent to the client when requesting
     a client certificate for ctx.

     SSL_add_client_CA() adds the CA name extracted from cacert
     to the list of CAs sent to the client when requesting a
     client certificate for the chosen ssl, overriding the
     setting valid for ssl's SSL_CTX object.

NOTES

     When a TLS/SSL server requests a client certificate (see
     SSSSLL_CCTTXX_sseett_vveerriiffyy(3)), it sends a list of CAs, for which it
     will accept certificates, to the client.

     This list must explicitly be set using
     SSL_CTX_set_client_CA_list() for ctx and
     SSL_set_client_CA_list() for the specific ssl. The list
     specified overrides the previous setting. The CAs listed do
     not become trusted (list only contains the names, not the
     complete certificates); use SSL_CTX_load_verify_locations(3)
     to additionally load them for verification.

     If the list of acceptable CAs is compiled in a file, the
     SSL_load_client_CA_file(3) function can be used to help
     importing the necessary data.

     SSL_CTX_add_client_CA() and SSL_add_client_CA() can be used
     to add additional items the list of client CAs. If no list
     was specified before using SSL_CTX_set_client_CA_list() or
     SSL_set_client_CA_list(), a new client CA list for ctx or
     ssl (as appropriate) is opened.

1.0.2t               Last change: 2019-09-10                    1

SSL_CTX_set_client_CA_list(3)OpenSSLSSL_CTX_set_client_CA_list(3)

     These functions are only useful for TLS/SSL servers.

     SSL_CTX_set_client_CA_list() and SSL_set_client_CA_list() do
     not return diagnostic information.

     SSL_CTX_add_client_CA() and SSL_add_client_CA() have the
     following return values:

     0   A failure while manipulating the STACK_OF(X509_NAME)
         object occurred or the X509_NAME could not be extracted
         from cacert. Check the error stack to find out the
         reason.

     1   The operation succeeded.

     Scan all certificates in CAfile and list them as acceptable
     CAs:

       SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));

     ssl(3), SSL_get_client_CA_list(3),
     SSL_load_client_CA_file(3), SSL_CTX_load_verify_locations(3)

1.0.2t               Last change: 2019-09-10                    2

See also SSL_CTX_add_client_CA(3)
See also SSL_CTX_set_client_CA_list(3)
See also SSL_add_client_CA(3)