SSL_get_ex_data_X509_STORE_CTX_idx,
SSL_CTX_set_verify, SSL_set_verify,
SSL_CTX_set_verify_depth, SSL_set_verify_depth,
-SSL_verify_cb
+SSL_verify_cb,
+SSL_verify_client_post_handshake,
+SSL_set_post_handshake_auth,
+SSL_CTX_set_post_handshake_auth
- set peer certificate verification parameters
=head1 SYNOPSIS
typedef int (*SSL_verify_cb)(int preverify_ok, X509_STORE_CTX *x509_ctx);
void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, SSL_verify_cb verify_callback);
- void SSL_set_verify(SSL *s, int mode, SSL_verify_cb verify_callback);
+ void SSL_set_verify(SSL *ssl, int mode, SSL_verify_cb verify_callback);
SSL_get_ex_data_X509_STORE_CTX_idx(void);
void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth);
- void SSL_set_verify_depth(SSL *s, int depth);
+ void SSL_set_verify_depth(SSL *ssl, int depth);
+
+ int SSL_verify_client_post_handshake(SSL *ssl);
+ void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val);
+ void SSL_set_post_handshake_auth(SSL *ssl, int val);
=head1 DESCRIPTION
SSL_set_verify_depth() sets the maximum B<depth> for the certificate chain
verification that shall be allowed for B<ssl>.
+SSL_CTX_set_post_handshake_auth() and SSL_set_post_handshake_auth() enable the
+Post-Handshake Authentication extension to be added to the ClientHello such that
+post-handshake authentication can be requested by the server. If B<val> is 0
+then the extension is not sent, otherwise it is. By default the extension is not
+sent. A certificate callback will need to be set via
+SSL_CTX_set_client_cert_cb() if no certificate is provided at initialization.
+
+SSL_verify_client_post_handshake() causes a CertificateRequest message to be
+sent by a server on the given B<ssl> connection. The SSL_VERIFY_PEER flag must
+be set; the SSL_VERIFY_POST_HANDSHAKE flag is optional.
+
=head1 NOTES
The verification of certificates can be controlled by a set of logically
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.
+SSL_VERIFY_FAIL_IF_NO_PEER_CERT, SSL_VERIFY_CLIENT_ONCE and
+SSL_VERIFY_POST_HANDSHAKE flags.
B<Client mode:> the server certificate is verified. If the verification process
fails, the TLS/SSL handshake is
=item SSL_VERIFY_CLIENT_ONCE
-B<Server mode:> only request a client certificate on the initial TLS/SSL
-handshake. Do not ask for a client certificate again in case of a
-renegotiation. This flag must be used together with SSL_VERIFY_PEER.
+B<Server mode:> only request a client certificate once during the
+connection. Do not ask for a client certificate again during
+renegotiation or post-authentication if a certificate was requested
+during the initial handshake. This flag must be used together with
+SSL_VERIFY_PEER.
+
+B<Client mode:> ignored
+
+=item SSL_VERIFY_POST_HANDSHAKE
+
+B<Server mode:> the server will not send a client certificate request
+during the initial handshake, but will send the request via
+SSL_verify_client_post_handshake(). This allows the SSL_CTX or SSL
+to be configured for post-handshake peer verification before the
+handshake occurs. This flag must be used together with
+SSL_VERIFY_PEER. TLSv1.3 only; no effect on pre-TLSv1.3 connections.
B<Client mode:> ignored
failure will lead to a termination of the TLS/SSL handshake with an
alert message, if SSL_VERIFY_PEER is set.
+After calling SSL_set_post_handshake_auth(), the client will need to add a
+certificate or certificate callback to its configuration before it can
+successfully authenticate. This must be called before SSL_connect().
+
+SSL_verify_client_post_handshake() requires that verify flags have been
+previously set, and that a client sent the post-handshake authentication
+extension. When the client returns a certificate the verify callback will be
+invoked. A write operation must take place for the Certificate Request to be
+sent to the client, this can be done with SSL_do_handshake() or SSL_write_ex().
+Only one certificate request may be outstanding at any time.
+
+When post-handshake authentication occurs, a refreshed NewSessionTicket
+message is sent to the client.
+
=head1 BUGS
In client mode, it is not checked whether the SSL_VERIFY_PEER flag
The SSL*_set_verify*() functions do not provide diagnostic information.
+The SSL_verify_client_post_handshake() function returns 1 if the request
+succeeded, and 0 if the request failed. The error stack can be examined
+to determine the failure reason.
+
=head1 EXAMPLES
The following code sequence realizes an example B<verify_callback> function
L<SSL_get_peer_certificate(3)>,
L<SSL_CTX_set_cert_verify_callback(3)>,
L<SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
+L<SSL_CTX_set_client_cert_cb(3)>,
L<CRYPTO_get_ex_new_index(3)>
+=head1 HISTORY
+
+The SSL_VERIFY_POST_HANDSHAKE option, and the SSL_verify_client_post_handshake()
+and SSL_set_post_handshake_auth() functions were added in OpenSSL 1.1.1.
+
=head1 COPYRIGHT
-Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
-Licensed under the OpenSSL license (the "License"). You may not use
+Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
projects / openssl.git / blobdiff