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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(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.
       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:
       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.
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)

1.0.2k                            2017-01-26     SSL_CTX_set_client_CA_list(3)