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/*
* Copyright 2023, Vincent Douillet <vincent@vdouillet.fr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "browse.h"
#include "cgi.h"
#include "config.h"
#include "create.h"
#include "delete.h"
#include "download.h"
#include "http.h"
#include "upload.h"
#ifdef __Linux__
#include "vll_sandbox.h"
#endif /* __Linux__ */
enum page {
PAGE_BROWSE,
PAGE_DOWNLOAD,
PAGE_UPLOAD,
PAGE_DELETE,
PAGE_CREATE,
PAGE__MAX
};
static const char *const pages[PAGE__MAX] = {
BROWSE_URL,
DOWNLOAD_URL,
UPLOAD_URL,
DELETE_URL,
CREATE_URL,
};
int
main(void)
{
char *data_dir;
#ifdef __Linux__
int vll_ruleset_id;
#endif /* __Linux__ */
enum kcgi_err parse_err;
struct kreq r;
if (kutil_openlog(LOG_FILE) == 0) {
http_exit(NULL, KHTTP_500, "Unable to open %s", LOG_FILE);
return EXIT_SUCCESS;
}
parse_err = khttp_parse(&r, NULL, 0, pages, PAGE__MAX, PAGE_BROWSE);
if (parse_err != KCGI_OK) {
http_exit(NULL, KHTTP_500, "Unable to parse request: %s",
kcgi_strerror(parse_err));
return EXIT_SUCCESS;
}
data_dir = config_data_dir();
if (data_dir == NULL) {
http_exit(NULL, KHTTP_500, "Data dir not configured");
goto end;
}
/* A bit of security cannot hurt */
#ifdef __OpenBSD__
if (-1 == unveil(data_dir, "rwc")
|| -1 == unveil(TEMPLATE_DIR, "r")
|| -1 == unveil(NULL, NULL)) {
http_exit(&r, KHTTP_500, "Unveil failed: %s", strerror(errno));
goto end;
}
if (-1 == pledge("stdio rpath wpath cpath", NULL)) {
http_exit(&r, KHTTP_500, "Pledge failed: %s", strerror(errno));
goto end;
}
#endif /* __OpenBSD__ */
#ifdef __Linux__
vll_ruleset_id = vll_create_ruleset();
if (vll_ruleset_id < 0) {
http_exit(&r, KHTTP_500, "vll_ruleset_id failed");
goto end;
}
if (-1 == vll_add_rule(vll_ruleset_id, data_dir, VLL_READ | VLL_WRITE)
|| -1 == vll_add_rule(vll_ruleset_id, TEMPLATE_DIR, VLL_READ)) {
http_exit(&r, KHTTP_500, "vll_add_rule failed");
goto end;
}
if (-1 == vll_restrict_self(vll_ruleset_id)) {
http_exit(&r, KHTTP_500, "vrr_restrict_self failed");
goto end;
}
#endif /* __Linux__ */
/*
* Make sure basic request parameters are as expected : GET or POST,
* valid page and HTML document
*/
if (r.method != KMETHOD_GET && r.method != KMETHOD_POST) {
http_exit(&r, KHTTP_405, NULL);
goto end;
}
if (r.page == PAGE__MAX) {
http_exit(&r, KHTTP_404, NULL);
goto end;
}
switch (r.page) {
case PAGE_BROWSE:
if (r.mime != KMIME_TEXT_HTML)
http_exit(&r, KHTTP_406, NULL); /* Not Acceptable */
browse(&r);
break;
case PAGE_DOWNLOAD:
download(&r);
break;
case PAGE_UPLOAD:
upload(&r);
break;
case PAGE_DELETE:
del(&r);
break;
case PAGE_CREATE:
create(&r);
break;
default:
http_exit(&r, KHTTP_404, NULL);
goto end;
}
end:
khttp_free(&r);
return EXIT_SUCCESS;
}
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