aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/restricted/aws/s2n/tls/s2n_client_hello.h
blob: 1d6afd95d5f1b764e5ff2e7125afcc4dd44d89e9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

#pragma once

#include <stdint.h>
#include "api/s2n.h"

#include "stuffer/s2n_stuffer.h"
#include "tls/extensions/s2n_extension_list.h"

#include "utils/s2n_array.h"
/*
 * the 'data' pointers in the below blobs
 * point to data in the raw_message stuffer
 */
struct s2n_client_hello {
    struct s2n_blob raw_message;

    s2n_parsed_extensions_list extensions;
    struct s2n_blob cipher_suites;
    struct s2n_blob session_id;

    unsigned int callback_invoked:1;
    unsigned int callback_async_blocked:1;
    unsigned int callback_async_done:1;
    /*
     * Marks if the client hello has been parsed.
     *
     * While a client_hello is only parsed once, it is possible to parse
     * two different client_hello during a single handshake if the server
     * issues a hello retry.
     */
    unsigned int parsed:1;
};

int s2n_client_hello_free(struct s2n_client_hello *client_hello);

extern struct s2n_client_hello *s2n_connection_get_client_hello(struct s2n_connection *conn);

extern ssize_t s2n_client_hello_get_raw_message_length(struct s2n_client_hello *ch);
extern ssize_t s2n_client_hello_get_raw_message(struct s2n_client_hello *ch, uint8_t *out, uint32_t max_length);

extern ssize_t s2n_client_hello_get_cipher_suites_length(struct s2n_client_hello *ch);
extern ssize_t s2n_client_hello_get_cipher_suites(struct s2n_client_hello *ch, uint8_t *out, uint32_t max_length);

extern ssize_t s2n_client_hello_get_extensions_length(struct s2n_client_hello *ch);
extern ssize_t s2n_client_hello_get_extensions(struct s2n_client_hello *ch, uint8_t *out, uint32_t max_length);