blob: 22d903be1f4f059f32f7d2ebbc08a81108420708 (
plain)
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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2025-present Eclipse ThreadX Contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** Transport Layer Security (TLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_tls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_tls_process_changecipherspec PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function processes an incoming ChangeCipherSpec message and */
/* sets the TLS state machine state accordingly. */
/* */
/* INPUT */
/* */
/* tls_session TLS control block */
/* packet_buffer Pointer to message data */
/* message_length Length of message data (bytes)*/
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_tls_session_keys_set Set session keys */
/* */
/* CALLED BY */
/* */
/* _nx_secure_dtls_process_record Process DTLS record */
/* _nx_secure_tls_process_record Process TLS record */
/* */
/**************************************************************************/
UINT _nx_secure_tls_process_changecipherspec(NX_SECURE_TLS_SESSION *tls_session,
UCHAR *packet_buffer, UINT message_length)
{
UINT status = NX_SUCCESS;
/* Verify that we received a proper ChangeCipherSpec message. */
if (message_length != 1)
{
return(NX_SECURE_TLS_INCORRECT_MESSAGE_LENGTH);
}
/* The contents of a ChangeCipherSpec payload should always be a single byte with value 1. */
if (packet_buffer[0] != 0x1)
{
return(NX_SECURE_TLS_BAD_CIPHERSPEC);
}
#if (NX_SECURE_TLS_TLS_1_3_ENABLED)
/* TLS 1.3 deprecates the ChangeCipherSpec message. Check that it's correct (above)
but otherwise ignore it. */
if(!tls_session->nx_secure_tls_1_3)
#endif
{
#ifndef NX_SECURE_TLS_SERVER_DISABLED
if (tls_session -> nx_secure_tls_socket_type == NX_SECURE_TLS_SESSION_TYPE_SERVER &&
tls_session -> nx_secure_tls_server_state != NX_SECURE_TLS_SERVER_STATE_KEY_EXCHANGE &&
tls_session -> nx_secure_tls_server_state != NX_SECURE_TLS_SERVER_STATE_CERTIFICATE_VERIFY)
{
return(NX_SECURE_TLS_UNEXPECTED_MESSAGE);
}
#endif
#ifndef NX_SECURE_TLS_CLIENT_DISABLED
if (tls_session -> nx_secure_tls_socket_type == NX_SECURE_TLS_SESSION_TYPE_CLIENT &&
tls_session -> nx_secure_tls_client_state != NX_SECURE_TLS_CLIENT_STATE_SERVERHELLO_DONE)
{
return(NX_SECURE_TLS_UNEXPECTED_MESSAGE);
}
#endif
/* The remote session is now active - all incoming records from this point will be hashed and encrypted. */
tls_session -> nx_secure_tls_remote_session_active = 1;
/* Reset the sequence number now that we are starting a new session. */
NX_SECURE_MEMSET(tls_session -> nx_secure_tls_remote_sequence_number, 0, sizeof(tls_session -> nx_secure_tls_remote_sequence_number));
/* Set our remote session keys since we have received a CCS from the remote host. */
status = _nx_secure_tls_session_keys_set(tls_session, NX_SECURE_TLS_KEY_SET_REMOTE);
}
return(status);
}
|
