1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** NetX Secure Component */
17 /** */
18 /** Transport Layer Security (TLS) */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define NX_SECURE_SOURCE_CODE
24
25 #include "nx_secure_tls.h"
26
27 /**************************************************************************/
28 /* */
29 /* FUNCTION RELEASE */
30 /* */
31 /* _nx_secure_tls_allocate_handshake_packet PORTABLE C */
32 /* 6.1 */
33 /* AUTHOR */
34 /* */
35 /* Timothy Stapko, Microsoft Corporation */
36 /* */
37 /* DESCRIPTION */
38 /* */
39 /* This function allocates a packet, positions the prepend_ptr and */
40 /* append_ptr suitable for TLS handshake packets. */
41 /* */
42 /* INPUT */
43 /* */
44 /* tls_session TLS control block */
45 /* packet_pool The pool to allocate from */
46 /* packet_ptr Pointer to the allocated */
47 /* packet */
48 /* wait_option Controls timeout actions */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* status Completion status */
53 /* */
54 /* CALLS */
55 /* */
56 /* _nx_secure_tls_packet_allocate Allocate internal TLS packet */
57 /* tx_mutex_get Get protection mutex */
58 /* tx_mutex_put Put protection mutex */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* _nx_secure_tls_server_handshake TLS Server state machine */
63 /* _nx_secure_tls_client_handshake TLS Client state machine */
64 /* _nx_secure_tls_session_renegotiate Renegotiate TLS session */
65 /* _nx_secure_tls_session_start Start TLS session */
66 /* */
67 /* RELEASE HISTORY */
68 /* */
69 /* DATE NAME DESCRIPTION */
70 /* */
71 /* 05-19-2020 Timothy Stapko Initial Version 6.0 */
72 /* 09-30-2020 Timothy Stapko Modified comment(s), */
73 /* resulting in version 6.1 */
74 /* */
75 /**************************************************************************/
_nx_secure_tls_allocate_handshake_packet(NX_SECURE_TLS_SESSION * tls_session,NX_PACKET_POOL * packet_pool,NX_PACKET ** packet_ptr,ULONG wait_option)76 UINT _nx_secure_tls_allocate_handshake_packet(NX_SECURE_TLS_SESSION *tls_session,
77 NX_PACKET_POOL *packet_pool,
78 NX_PACKET **packet_ptr, ULONG wait_option)
79 {
80 UINT status;
81
82 /* Release the protection before suspending on nx_packet_allocate. */
83 tx_mutex_put(&_nx_secure_tls_protection);
84
85 status = _nx_secure_tls_packet_allocate(tls_session, packet_pool, packet_ptr, wait_option);
86
87 /* Get the protection after nx_packet_allocate. */
88 tx_mutex_get(&_nx_secure_tls_protection, TX_WAIT_FOREVER);
89
90 if (status != NX_SECURE_TLS_SUCCESS)
91 {
92 return(NX_SECURE_TLS_ALLOCATE_PACKET_FAILED);
93 }
94
95 if (((ULONG)((*packet_ptr) -> nx_packet_data_end) - (ULONG)((*packet_ptr) -> nx_packet_prepend_ptr)) <
96 NX_SECURE_TLS_HANDSHAKE_HEADER_SIZE)
97 {
98
99 /* Packet buffer is too small. */
100 nx_packet_release(*packet_ptr);
101 return(NX_SECURE_TLS_PACKET_BUFFER_TOO_SMALL);
102 }
103
104 /* Allocate space for the handshake header. */
105 (*packet_ptr) -> nx_packet_prepend_ptr += NX_SECURE_TLS_HANDSHAKE_HEADER_SIZE;
106 (*packet_ptr) -> nx_packet_append_ptr = (*packet_ptr) -> nx_packet_prepend_ptr;
107
108
109 return(NX_SECURE_TLS_SUCCESS);
110 }
111
112
