SSL_CTX_set_client_CA_list(3)					      OpenSSL					     SSL_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 SSL_CTX_set_verify_options()), 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 certifi-
       cates); 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.

       These functions are only useful for TLS/SSL servers.

RETURN VALUES

       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:

       1   The operation succeeded.

       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.

EXAMPLES

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

	 SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));

SEE ALSO

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

0.9.7a								    2001-04-12					     SSL_CTX_set_client_CA_list(3)