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SSL_GET_CLIENT_CA_LIST(3) Library Functions Manual SSL_GET_CLIENT_CA_LIST(3)

SSL_get_client_CA_list, SSL_CTX_get_client_CA_list
get list of client CAs

#include <openssl/ssl.h>
STACK_OF(X509_NAME) *
SSL_get_client_CA_list(const SSL *s);
STACK_OF(X509_NAME) *
SSL_CTX_get_client_CA_list(const SSL_CTX *ctx);

SSL_CTX_get_client_CA_list() returns the list of client CAs explicitly set for ctx using SSL_CTX_set_client_CA_list(3).
SSL_get_client_CA_list() returns the list of client CAs explicitly set for ssl using SSL_set_client_CA_list() or ssl's SSL_CTX object with SSL_CTX_set_client_CA_list(3), when in server mode. In client mode, SSL_get_client_CA_list() returns the list of client CAs sent from the server, if any.

ssl(3), SSL_CTX_set_client_CA_list(3), SSL_CTX_set_client_cert_cb(3), X509_NAME_new(3)

SSL_get_client_CA_list() and SSL_CTX_get_client_CA_list() first appeared in SSLeay 0.8.0 and have been available since OpenBSD 2.4.
March 27, 2018 OpenBSD-current