B<Server mode:> the server sends a client certificate request to the client.
The certificate returned (if any) is checked. If the verification process
-fails as indicated by B<verify_callback>, the TLS/SSL handshake is
+fails, the TLS/SSL handshake is
immediately terminated with an alert message containing the reason for
the verification failure.
The behaviour can be controlled by the additional
SSL_VERIFY_FAIL_IF_NO_PEER_CERT and SSL_VERIFY_CLIENT_ONCE flags.
B<Client mode:> the server certificate is verified. If the verification process
-fails as indicated by B<verify_callback>, the TLS/SSL handshake is
+fails, the TLS/SSL handshake is
immediately terminated with an alert message containing the reason for
the verification failure. If no server certificate is sent, because an
anonymous cipher is used, SSL_VERIFY_PEER is ignored.
Exactly one of the B<mode> flags SSL_VERIFY_NONE and SSL_VERIFY_PEER must be
set at any time.
+The actual verification procedure is performed either using the built-in
+verification procedure or using another application provided verification
+function set with
+L<SSL_CTX_set_cert_verify_callback(3)|SSL_CTX_set_cert_verify_callback(3)>.
+The following descriptions apply in the case of the built-in procedure. An
+application provided procedure also has access to the verify depth information
+and the verify_callback() function, but the way this information is used
+may be different.
+
SSL_CTX_set_verify_depth() and SSL_set_verify_depth() set the limit up
to which depth certificates in a chain are used during the verification
procedure. If the certificate chain is longer than allowed, the certificates
L<SSL_get_verify_result(3)|SSL_get_verify_result(3)>,
L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)>,
L<SSL_get_peer_certificate(3)|SSL_get_peer_certificate(3)>,
+L<SSL_CTX_set_cert_verify_callback(3)|SSL_CTX_set_cert_verify_callback(3)>,
L<SSL_get_ex_data_X509_STORE_CTX_idx(3)|SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
L<SSL_get_ex_new_index(3)|SSL_get_ex_new_index(3)>
=item void B<SSL_CTX_set_cert_store>(SSL_CTX *ctx, X509_STORE *cs);
-=item void B<SSL_CTX_set_cert_verify_cb>(SSL_CTX *ctx, int (*cb)(SSL_CTX *), char *arg)
+=item void B<SSL_CTX_set_cert_verify_cb>(SSL_CTX *ctx, int (*cb)(), char *arg)
=item int B<SSL_CTX_set_cipher_list>(SSL_CTX *ctx, char *str);
L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>,
L<SSL_CTX_sessions(3)|SSL_CTX_sessions(3)>,
L<SSL_CTX_set_cert_store(3)|SSL_CTX_set_cert_store(3)>,
+L<SSL_CTX_set_cert_verify_callback(3)|SSL_CTX_set_cert_verify_callback(3)>,
L<SSL_CTX_set_cipher_list(3)|SSL_CTX_set_cipher_list(3)>,
L<SSL_CTX_set_client_CA_list(3)|SSL_CTX_set_client_CA_list(3)>,
L<SSL_CTX_set_default_passwd_cb(3)|SSL_CTX_set_default_passwd_cb(3)>,