NAME
SSL_CTX_set_stateless_cookie_generate_cb, SSL_CTX_set_stateless_cookie_verify_cb, SSL_CTX_set_cookie_generate_cb, SSL_CTX_set_cookie_verify_cb - Callback functions for stateless TLS1.3 cookies
SYNOPSIS
#include <openssl/ssl.h>
void SSL_CTX_set_stateless_cookie_generate_cb(
SSL_CTX *ctx,
int (*gen_stateless_cookie_cb) (SSL *ssl,
unsigned char *cookie,
size_t *cookie_len));
void SSL_CTX_set_stateless_cookie_verify_cb(
SSL_CTX *ctx,
int (*verify_stateless_cookie_cb) (SSL *ssl,
const unsigned char *cookie,
size_t cookie_len));
void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
int (*app_gen_cookie_cb) (SSL *ssl,
unsigned char
*cookie,
unsigned int
*cookie_len));
void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
int (*app_verify_cookie_cb) (SSL *ssl,
const unsigned
char *cookie,
unsigned int
cookie_len));
DESCRIPTION
SSL_CTX_set_stateless_cookie_generate_cb() sets the callback used by SSL_stateless(3) to determine whether the application-controlled portion of a ClientHello cookie is valid. The cookie data is pointed to by cookie and is of length cookie_len. A nonzero return value from verify_stateless_cookie_cb() communicates that the cookie is valid. The integrity of the entire cookie, including the application-controlled portion, is automatically verified by HMAC before verify_stateless_cookie_cb() is called.
SSL_CTX_set_cookie_generate_cb() sets the callback used by DTLSv1_listen(3) to determine whether the cookie in a ClientHello is valid. The cookie data is pointed to by cookie and is of length cookie_len. A nonzero return value from app_verify_cookie_cb() communicates that the cookie is valid. The integrity of the cookie is not verified by OpenSSL. This is an application responsibility.
RETURN VALUES
Neither function returns a value.
SEE ALSO
SSL_stateless(3), HISTORY
SSL_CTX_set_stateless_cookie_generate_cb() and SSL_CTX_set_stateless_cookie_verify_cb() were added in OpenSSL 1.1.1. Copyright 2018 The OpenSSL Project Authors. All Rights Reserved. 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 https://www.openssl.org/source/license.html.COPYRIGHT