blob: 43ae4e66274da08c3f038abcdb5bff6eeb1493d7 (
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
|
/***************************************************************************
* 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_handshake_header PORTABLE C */
/* 6.1.11 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function processes a TLS Handshake record header, which is */
/* at the beginning of each TLS Handshake message, encapsulated within */
/* the TLS record itself. */
/* */
/* INPUT */
/* */
/* packet_buffer Pointer to incoming packet */
/* message_type Return message type value */
/* header_size Input size of packet buffer */
/* Return size of header */
/* message_length Return length of message */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_secure_tls_client_handshake TLS client state machine */
/* _nx_secure_tls_server_handshake TLS server state machine */
/* */
/**************************************************************************/
UINT _nx_secure_tls_process_handshake_header(UCHAR *packet_buffer, USHORT *message_type,
UINT *header_size, UINT *message_length)
{
/* Check buffer length. */
if (*header_size < 4)
{
return(NX_SECURE_TLS_INCORRECT_MESSAGE_LENGTH);
}
/* The message being passed in to this function should already be stripped of the TLS header
so the first byte in the packet/record is our handshake message type. */
*message_type = packet_buffer[0];
packet_buffer++;
/* Get the length of the TLS data. */
*message_length = (UINT)((packet_buffer[0] << 16) + (packet_buffer[1] << 8) + packet_buffer[2]);
/* We have extracted 4 bytes of the header. */
*header_size = 4;
return(NX_SECURE_TLS_SUCCESS);
}
|
