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ohs_th_https.h
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ohs_th_https.h
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/*
* ohs_th_https.h
*
* Created on: 6. 9. 2020
* Author: adam
*/
#ifndef OHS_TH_HTTPS_H_
#define OHS_TH_HTTPS_H_
#ifdef OHS_HTTPS
#define WOLFSSL_STM32F4
#include "wolfssl_chibios.h"
#if !defined(WEB_THREAD_STACK_SIZE)
#define WEB_THREAD_STACK_SIZE (16 * 1024)
#endif
#if !defined(WEB_THREAD_PORT)
#define WEB_THREAD_PORT 443
#endif
#if !defined(WEB_THREAD_PRIORITY)
#define WEB_THREAD_PRIORITY (LOWPRIO + 2)
#endif
#if !defined(WEB_MAX_PATH_SIZE)
#define WEB_MAX_PATH_SIZE 128
#endif
const unsigned char server_cert[] = {
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0xbb, 0x60, 0xd3, 0x30, 0x0c, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x04, 0x05,
0x30, 0x03, 0x01, 0x01, 0xff, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48,
0xce, 0x3d, 0x04, 0x03, 0x02, 0x03, 0x49, 0x00, 0x30, 0x46, 0x02, 0x21,
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};
unsigned int server_cert_len = 788;
const unsigned char server_key[] = {
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0x4c, 0x27, 0x50, 0x4a, 0xc6, 0x4a, 0xa5, 0x04, 0xc3, 0x3c, 0xde, 0x9f,
0x36, 0xdb, 0x72, 0x2d, 0xce, 0x94, 0xea, 0x2b, 0xfa, 0xcb, 0x20, 0x09,
0x39, 0x2c, 0x16, 0xe8, 0x61, 0x02, 0xe9, 0xaf, 0x4d, 0xd3, 0x02, 0x93,
0x9a, 0x31, 0x5b, 0x97, 0x92, 0x21, 0x7f, 0xf0, 0xcf, 0x18, 0xda, 0x91,
0x11, 0x02, 0x34, 0x86, 0xe8, 0x20, 0x58, 0x33, 0x0b, 0x80, 0x34, 0x89,
0xd8
};
unsigned int server_key_len = 121;
static char url_buffer[WEB_MAX_PATH_SIZE];
unsigned int server_cert_len;
unsigned int server_key_len;
#define HEXTOI(x) (isdigit(x) ? (x) - '0' : (x) - 'a' + 10)
/**
* @brief Decodes an URL sting.
* @note The string is terminated by a zero or a separator.
*
* @param[in] url encoded URL string
* @param[out] buf buffer for the processed string
* @param[in] max max number of chars to copy into the buffer
* @return The conversion status.
* @retval false string converted.
* @retval true the string was not valid or the buffer overflowed
*
* @notapi
*/
static bool decode_url(const char *url, char *buf, size_t max) {
while (true) {
int h, l;
unsigned c = *url++;
switch (c) {
case 0:
case '\r':
case '\n':
case '\t':
case ' ':
case '?':
*buf = 0;
return false;
case '.':
if (max <= 1)
return true;
h = *(url + 1);
if (h == '.')
return true;
break;
case '%':
if (max <= 1)
return true;
h = tolower((int)*url++);
if (h == 0)
return true;
if (!isxdigit(h))
return true;
l = tolower((int)*url++);
if (l == 0)
return true;
if (!isxdigit(l))
return true;
c = (char)((HEXTOI(h) << 4) | HEXTOI(l));
break;
default:
if (max <= 1)
return true;
if (!isalnum(c) && (c != '_') && (c != '-') && (c != '+') &&
(c != '/'))
return true;
break;
}
*buf++ = c;
max--;
}
}
#define MAX_HTTPREQ_SIZE 256
static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
static const char http_index_html[] = "<html><head><title>Congrats!</title></head><body><h1>Welcome to chibiOS HTTPS server!</h1><p>Powered by LwIP + WolfSSL</body></html>";
static char inbuf[MAX_HTTPREQ_SIZE];
static void https_server_serve(sslconn *sc)
{
int ret;
/* Read the data from the port, blocking if nothing yet there.
We assume the request (the part we care about) is in one netbuf.*/
ret = wolfSSL_read(sc->ssl, inbuf, MAX_HTTPREQ_SIZE);
if (ret >= 5 &&
inbuf[0] == 'G' &&
inbuf[1] == 'E' &&
inbuf[2] == 'T' &&
inbuf[3] == ' ' &&
inbuf[4] == '/') {
if (decode_url(inbuf + 4, url_buffer, WEB_MAX_PATH_SIZE)) {
/* Invalid URL handling.*/
return;
}
/* Send the HTML header
* subtract 1 from the size, since we dont send the \0 in the string
* NETCONN_NOCOPY: our data is const static, so no need to copy it
*/
wolfSSL_write(sc->ssl, http_html_hdr, sizeof(http_html_hdr)-1);
/* Send our HTML page */
wolfSSL_write(sc->ssl, http_index_html, sizeof(http_index_html)-1);
}
}
/**
* @brief Stack area for the http thread.
*/
THD_WORKING_AREA(wa_https_server, WEB_THREAD_STACK_SIZE);
/**
* @brssl HTTPS server thread.
*/
THD_FUNCTION(https_server, p) {
sslconn *sc, *newsc;
(void)p;
chRegSetThreadName("https");
/* Initialize wolfSSL */
wolfSSL_Init();
/* Create a new SSL connection handle */
sc = sslconn_new(NETCONN_TCP, wolfTLSv1_2_server_method());
if (!sc) {
while(1) {}
}
/* Load certificate file for the HTTPS server */
if (wolfSSL_CTX_use_certificate_buffer(sc->ctx, server_cert,
server_cert_len, SSL_FILETYPE_ASN1 ) != SSL_SUCCESS)
while(1) {}
/* Load the private key */
if (wolfSSL_CTX_use_PrivateKey_buffer(sc->ctx, server_key,
server_key_len, SSL_FILETYPE_ASN1 ) != SSL_SUCCESS)
while(1) {}
/* Bind to port 443 (HTTPS) with default IP address */
netconn_bind(sc->conn, NULL, WEB_THREAD_PORT);
/* Put the connection into LISTEN state */
netconn_listen(sc->conn);
/* Goes to the final priority after initialization.*/
chThdSetPriority(WEB_THREAD_PRIORITY);
/* Listening loop */
while (true) {
newsc = sslconn_accept(sc);
if (!newsc) {
chThdSleepMilliseconds(100);
continue;
}
/* New connection: a new SSL connector is spawned */
https_server_serve(newsc);
//umm_info(&ohsUmmHeap[0], true);
sslconn_close(newsc);
}
}
#endif
#endif /* OHS_TH_HTTPS_H_ */