134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* $NetBSD: tilde-luzah-bozo.c,v 1.5 2009/04/18 07:28:24 mrg Exp $ */
|
|
|
|
/* $eterna: tilde-luzah-bozo.c,v 1.10 2009/04/18 05:36:04 mrg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997-2009 Matthew R. Green
|
|
* All rights reserved.
|
|
*
|
|
* 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 and
|
|
* dedication in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*
|
|
*/
|
|
|
|
/* this code implements ~user support for bozohttpd */
|
|
|
|
#ifndef NO_USER_SUPPORT
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <errno.h>
|
|
#include <pwd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "bozohttpd.h"
|
|
|
|
#ifndef PUBLIC_HTML
|
|
#define PUBLIC_HTML "public_html"
|
|
#endif
|
|
|
|
int uflag; /* allow /~user/ translation */
|
|
const char *public_html = PUBLIC_HTML;
|
|
|
|
/*
|
|
* user_transform does this:
|
|
* - chdir's /~user/public_html
|
|
* - returns the rest of the file, index.html appended if required
|
|
* - returned malloced file to serve in request->hr_file,
|
|
* ala transform_request().
|
|
*
|
|
* transform_request() is supposed to check that we have user support
|
|
* enabled.
|
|
*/
|
|
int
|
|
user_transform(request, isindex)
|
|
http_req *request;
|
|
int *isindex;
|
|
{
|
|
char c, *s, *file = NULL;
|
|
struct passwd *pw;
|
|
|
|
*isindex = 0;
|
|
|
|
if ((s = strchr(request->hr_file + 2, '/')) != NULL) {
|
|
*s++ = '\0';
|
|
c = s[strlen(s)-1];
|
|
*isindex = (c == '/' || c == '\0');
|
|
}
|
|
|
|
debug((DEBUG_OBESE, "looking for user %s", request->hr_file + 2));
|
|
pw = getpwnam(request->hr_file + 2);
|
|
/* fix this up immediately */
|
|
if (s)
|
|
s[-1] = '/';
|
|
if (pw == NULL) {
|
|
(void)http_error(404, request, "no such user");
|
|
return 0;
|
|
}
|
|
|
|
debug((DEBUG_OBESE, "user %s home dir %s uid %d gid %d", pw->pw_name,
|
|
pw->pw_dir, pw->pw_uid, pw->pw_gid));
|
|
|
|
if (chdir(pw->pw_dir) < 0) {
|
|
warning("chdir1 error: %s: %s", pw->pw_dir, strerror(errno));
|
|
(void)http_error(403, request, "can't chdir to homedir");
|
|
return 0;
|
|
}
|
|
if (chdir(public_html) < 0) {
|
|
warning("chdir2 error: %s: %s", public_html, strerror(errno));
|
|
(void)http_error(403, request, "can't chdir to public_html");
|
|
return 0;
|
|
}
|
|
if (s == NULL || *s == '\0') {
|
|
file = bozostrdup(index_html);
|
|
} else {
|
|
file = bozomalloc(strlen(s) +
|
|
(*isindex ? strlen(index_html) + 1 : 1));
|
|
strcpy(file, s);
|
|
if (*isindex)
|
|
strcat(file, index_html);
|
|
}
|
|
|
|
/* see transform_request() */
|
|
if (*file == '/' || strcmp(file, "..") == 0 ||
|
|
strstr(file, "/..") || strstr(file, "../")) {
|
|
(void)http_error(403, request, "illegal request");
|
|
free(file);
|
|
return 0;
|
|
}
|
|
|
|
if (auth_check(request, file)) {
|
|
free(file);
|
|
return 0;
|
|
}
|
|
|
|
free(request->hr_file);
|
|
request->hr_file = file;
|
|
|
|
debug((DEBUG_FAT, "transform_user returning %s under %s", file,
|
|
pw->pw_dir));
|
|
return 1;
|
|
}
|
|
#endif /* NO_USER_SUPPORT */
|