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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License 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.
*/
/*
* This file is a modified version of the lwIP web server demo. The original
* author is unknown because the file didn't contain any license information.
*/
/**
* @file web.c
* @brief HTTP client code.
* @{
*/
#include <ctype.h>
#include "ch.h"
#include "lwip/netdb.h"
#include "lwip/sockets.h"
#include <string.h>
#include "wolfssl_chibios.h"
#include "web.h"
#include "chprintf.h"
extern unsigned char client_cert[];
extern unsigned int client_cert_len;
/* HTTP request */
static const char *REQUEST = "GET "CONFIG_RESOURCE" HTTP/1.0\r\n"
"Host: "CONFIG_WEBSITE"\r\n"
"User-Agent: SAMA5D2\r\n"
"\r\n";
static char recv_buf[1000];
struct addrinfo hints = {
.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM,
};
static struct addrinfo *res;
static WOLFSSL_CTX* ctx;
static WOLFSSL* ssl;
static WOLFSSL_METHOD* method;
/*
* @brief HTTPS client functions.
*/
int https_client(void) {
/* Resolve the IP of the target website */
int result = getaddrinfo(CONFIG_WEBSITE, WEB_PORT, &hints, &res);
if((result != 0) || (res == NULL)) {
chprintf((BaseSequentialStream *)&SD1, "Unable to resolve IP for target website %s\n\r", CONFIG_WEBSITE);
return 0;
}
chprintf((BaseSequentialStream *)&SD1,"Target website's IP resolved\n\r");
/* create a new socket */
int s = socket(AF_INET, SOCK_STREAM, 0);
if(s < 0) {
chprintf((BaseSequentialStream *)&SD1, "Unable to allocate a new socket\n\r");
return 0;
}
chprintf((BaseSequentialStream *)&SD1, "Socket allocated, id=%d\n\r", s);
/* connect to the specified server */
result = connect(s, res->ai_addr, res->ai_addrlen);
if(result != 0) {
chprintf((BaseSequentialStream *)&SD1, "Unable to connect to the target website\n\r");
close(s);
return 0;
}
chprintf((BaseSequentialStream *)&SD1, "Connected to the target website\n\r");
/* initialize wolfssl library */
wolfSSL_Init();
method = wolfTLSv1_2_client_method(); /* use TLS v1.2 */
/* make new ssl context */
if ((ctx = wolfSSL_CTX_new(method)) == NULL) {
chprintf((BaseSequentialStream *)&SD1, "wolfSSL_CTX_new error\n\r");
close(s);
return 0;
}
wolfSSL_SetIORecv(ctx, wolfssl_recv_cb) ;
wolfSSL_SetIOSend(ctx, wolfssl_send_cb) ;
/* Add cert to ctx */
int e = 0;
e = wolfSSL_CTX_load_verify_buffer(ctx, client_cert, client_cert_len, SSL_FILETYPE_ASN1);
if (e != SSL_SUCCESS) {
chprintf((BaseSequentialStream *)&SD1, "Error loading client certs\n\r");
close(s);
return 0;
}
/* TODO: delete this line */
wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
/* make new wolfSSL struct */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
chprintf((BaseSequentialStream *)&SD1, "wolfSSL_new error\n\r");
close(s);
return 0;
}
/* Connect wolfssl to the socket, server, then send message */
e = wolfSSL_set_fd(ssl, s);
if (e != SSL_SUCCESS) {
chprintf((BaseSequentialStream *)&SD1, "wolfSSL_set_fd error\n\r");
close(s);
return 0;
}
e = wolfSSL_connect(ssl);
if (e != SSL_SUCCESS) {
chprintf((BaseSequentialStream *)&SD1, "wolfSSL_connect error\n\r");
close(s);
return 0;
}
/* send the request */
result = wolfSSL_write(ssl, REQUEST, strlen(REQUEST));
if(result < 0) {
chprintf((BaseSequentialStream *)&SD1, "Unable to send the HTTP request\r\n");
close(s);
return 0;
}
chprintf((BaseSequentialStream *)&SD1, "HTTPS request sent\n\r");
/* print the response */
chprintf((BaseSequentialStream *)&SD1, "HTTPS response:\n\r");
chprintf((BaseSequentialStream *)&SD1,"--------------------------------------------------------------------------------\n\r");
int r;
do {
memset(recv_buf, 0, sizeof(recv_buf));
r = wolfSSL_read(ssl, recv_buf, sizeof(recv_buf) - 1);
chprintf((BaseSequentialStream *)&SD1,"%s\n\r",recv_buf);
} while(r > 0);
chprintf((BaseSequentialStream *)&SD1, "--------------------------------------------------------------------------------\n\r");
/* frees all data before client termination */
wolfSSL_free(ssl);
wolfSSL_CTX_free(ctx);
wolfSSL_Cleanup();
lwip_freeaddrinfo(res);
close(s);
chprintf((BaseSequentialStream *)&SD1, "Socket closed\n\r");
return 1;
}
/** @} */
|
