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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
/* <DESC>
* Preload domains to HSTS
* </DESC>
*/
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
struct entry {
const char *name;
const char *exp;
};
static const struct entry preload_hosts[] = {
{ "example.com", "20370320 01:02:03" },
{ "curl.se", "20370320 03:02:01" },
{ NULL, NULL } /* end of list marker */
};
struct state {
int index;
};
/* "read" is from the point of the library, it wants data from us. One domain
entry per invoke. */
static CURLSTScode hstsread(CURL *easy, struct curl_hstsentry *e,
void *userp)
{
const char *host;
const char *expire;
struct state *s = (struct state *)userp;
(void)easy;
host = preload_hosts[s->index].name;
expire = preload_hosts[s->index++].exp;
if(host && (strlen(host) < e->namelen)) {
strcpy(e->name, host);
e->includeSubDomains = 0;
strcpy(e->expire, expire);
fprintf(stderr, "HSTS preload '%s' until '%s'\n", host, expire);
}
else
return CURLSTS_DONE;
return CURLSTS_OK;
}
static CURLSTScode hstswrite(CURL *easy, struct curl_hstsentry *e,
struct curl_index *i, void *userp)
{
(void)easy;
(void)userp; /* we have no custom input */
printf("[%u/%u] %s %s\n", (unsigned int)i->index, (unsigned int)i->total,
e->name, e->expire);
return CURLSTS_OK;
}
int main(void)
{
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
struct state st = {0};
/* enable HSTS for this handle */
curl_easy_setopt(curl, CURLOPT_HSTS_CTRL, (long)CURLHSTS_ENABLE);
/* function to call at first to populate the cache before the transfer */
curl_easy_setopt(curl, CURLOPT_HSTSREADFUNCTION, hstsread);
curl_easy_setopt(curl, CURLOPT_HSTSREADDATA, &st);
/* function to call after transfer to store the new state of the HSTS
cache */
curl_easy_setopt(curl, CURLOPT_HSTSWRITEFUNCTION, hstswrite);
curl_easy_setopt(curl, CURLOPT_HSTSWRITEDATA, NULL);
/* use the domain with HTTP but due to the preload, it should do the
transfer using HTTPS */
curl_easy_setopt(curl, CURLOPT_URL, "http://curl.se");
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
/* Perform the request, res gets the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
/* always cleanup */
curl_easy_cleanup(curl);
}
return 0;
}