2015-12-27 13:21:35 +03:00
|
|
|
/* $NetBSD: auth-bozo.c,v 1.18 2015/12/27 10:21:35 mrg Exp $ */
|
2007-10-17 22:47:59 +04:00
|
|
|
|
2011-11-18 13:51:31 +04:00
|
|
|
/* $eterna: auth-bozo.c,v 1.17 2011/11/18 09:21:15 mrg Exp $ */
|
2007-10-16 05:14:01 +04:00
|
|
|
|
|
|
|
/*
|
2014-01-02 12:21:38 +04:00
|
|
|
* Copyright (c) 1997-2014 Matthew R. Green
|
2007-10-16 05:14:01 +04:00
|
|
|
* 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 "http basic authorisation" for bozohttpd */
|
|
|
|
|
|
|
|
#ifdef DO_HTPASSWD
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
|
|
|
|
#include <string.h>
|
2009-04-18 11:38:40 +04:00
|
|
|
#include <stdlib.h>
|
2007-10-16 05:14:01 +04:00
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
#include "bozohttpd.h"
|
|
|
|
|
|
|
|
#ifndef AUTH_FILE
|
|
|
|
#define AUTH_FILE ".htpasswd"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static ssize_t base64_decode(const unsigned char *, size_t,
|
|
|
|
unsigned char *, size_t);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check if HTTP authentication is required
|
|
|
|
*/
|
2009-04-18 11:28:24 +04:00
|
|
|
int
|
2010-05-10 18:44:19 +04:00
|
|
|
bozo_auth_check(bozo_httpreq_t *request, const char *file)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
2010-05-10 18:44:19 +04:00
|
|
|
bozohttpd_t *httpd = request->hr_httpd;
|
2007-10-16 05:14:01 +04:00
|
|
|
struct stat sb;
|
|
|
|
char dir[MAXPATHLEN], authfile[MAXPATHLEN], *basename;
|
|
|
|
char user[BUFSIZ], *pass;
|
|
|
|
FILE *fp;
|
|
|
|
int len;
|
|
|
|
|
|
|
|
/* get dir=dirname(file) */
|
|
|
|
snprintf(dir, sizeof(dir), "%s", file);
|
|
|
|
if ((basename = strrchr(dir, '/')) == NULL)
|
|
|
|
strcpy(dir, ".");
|
|
|
|
else {
|
|
|
|
*basename++ = '\0';
|
|
|
|
/* ensure basename(file) != AUTH_FILE */
|
2010-05-10 18:44:19 +04:00
|
|
|
if (bozo_check_special_files(request, basename))
|
2009-04-18 11:28:24 +04:00
|
|
|
return 1;
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
2015-12-27 13:21:35 +03:00
|
|
|
request->hr_authrealm = bozostrdup(httpd, request, dir);
|
2007-10-16 05:14:01 +04:00
|
|
|
|
2015-12-27 13:21:35 +03:00
|
|
|
if ((size_t)snprintf(authfile, sizeof(authfile), "%s/%s", dir,
|
|
|
|
AUTH_FILE) >= sizeof(authfile)) {
|
2014-07-08 18:01:21 +04:00
|
|
|
return bozo_http_error(httpd, 404, request,
|
|
|
|
"authfile path too long");
|
|
|
|
}
|
2007-10-16 05:14:01 +04:00
|
|
|
if (stat(authfile, &sb) < 0) {
|
2010-05-10 07:37:45 +04:00
|
|
|
debug((httpd, DEBUG_NORMAL,
|
|
|
|
"bozo_auth_check realm `%s' dir `%s' authfile `%s' missing",
|
2007-10-16 05:14:01 +04:00
|
|
|
dir, file, authfile));
|
2009-04-18 11:38:40 +04:00
|
|
|
return 0;
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
if ((fp = fopen(authfile, "r")) == NULL)
|
2010-05-10 07:37:45 +04:00
|
|
|
return bozo_http_error(httpd, 403, request,
|
|
|
|
"no permission to open authfile");
|
|
|
|
debug((httpd, DEBUG_NORMAL,
|
|
|
|
"bozo_auth_check realm `%s' dir `%s' authfile `%s' open",
|
2007-10-16 05:14:01 +04:00
|
|
|
dir, file, authfile));
|
|
|
|
if (request->hr_authuser && request->hr_authpass) {
|
|
|
|
while (fgets(user, sizeof(user), fp) != NULL) {
|
|
|
|
len = strlen(user);
|
|
|
|
if (len > 0 && user[len-1] == '\n')
|
|
|
|
user[--len] = '\0';
|
|
|
|
if ((pass = strchr(user, ':')) == NULL)
|
|
|
|
continue;
|
|
|
|
*pass++ = '\0';
|
2010-05-10 07:37:45 +04:00
|
|
|
debug((httpd, DEBUG_NORMAL,
|
|
|
|
"bozo_auth_check authfile `%s':`%s' "
|
|
|
|
"client `%s':`%s'",
|
2007-10-16 05:14:01 +04:00
|
|
|
user, pass, request->hr_authuser,
|
|
|
|
request->hr_authpass));
|
|
|
|
if (strcmp(request->hr_authuser, user) != 0)
|
|
|
|
continue;
|
2010-05-10 07:37:45 +04:00
|
|
|
if (strcmp(crypt(request->hr_authpass, pass),
|
|
|
|
pass) != 0)
|
2007-10-16 05:14:01 +04:00
|
|
|
break;
|
|
|
|
fclose(fp);
|
2009-04-18 11:38:40 +04:00
|
|
|
return 0;
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
fclose(fp);
|
2010-05-10 07:37:45 +04:00
|
|
|
return bozo_http_error(httpd, 401, request, "bad auth");
|
2009-04-18 11:28:24 +04:00
|
|
|
}
|
|
|
|
|
2014-11-21 11:58:28 +03:00
|
|
|
void
|
|
|
|
bozo_auth_init(bozo_httpreq_t *request)
|
|
|
|
{
|
|
|
|
request->hr_authuser = NULL;
|
|
|
|
request->hr_authpass = NULL;
|
|
|
|
}
|
|
|
|
|
2009-04-18 11:28:24 +04:00
|
|
|
void
|
2010-05-10 07:37:45 +04:00
|
|
|
bozo_auth_cleanup(bozo_httpreq_t *request)
|
2009-04-18 11:28:24 +04:00
|
|
|
{
|
|
|
|
|
|
|
|
if (request == NULL)
|
|
|
|
return;
|
2013-10-12 22:46:12 +04:00
|
|
|
free(request->hr_authuser);
|
|
|
|
free(request->hr_authpass);
|
|
|
|
free(request->hr_authrealm);
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2015-12-27 13:21:35 +03:00
|
|
|
bozo_auth_check_headers(bozo_httpreq_t *request, char *val, char *str,
|
|
|
|
ssize_t len)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
2010-05-10 18:44:19 +04:00
|
|
|
bozohttpd_t *httpd = request->hr_httpd;
|
|
|
|
|
2007-10-16 05:14:01 +04:00
|
|
|
if (strcasecmp(val, "authorization") == 0 &&
|
|
|
|
strncasecmp(str, "Basic ", 6) == 0) {
|
|
|
|
char authbuf[BUFSIZ];
|
2007-10-17 17:27:19 +04:00
|
|
|
char *pass = NULL;
|
2007-10-16 05:14:01 +04:00
|
|
|
ssize_t alen;
|
|
|
|
|
2010-05-10 07:37:45 +04:00
|
|
|
alen = base64_decode((unsigned char *)str + 6,
|
|
|
|
(size_t)(len - 6),
|
|
|
|
(unsigned char *)authbuf,
|
|
|
|
sizeof(authbuf) - 1);
|
2007-10-16 05:14:01 +04:00
|
|
|
if (alen != -1)
|
|
|
|
authbuf[alen] = '\0';
|
|
|
|
if (alen == -1 ||
|
|
|
|
(pass = strchr(authbuf, ':')) == NULL)
|
2010-05-10 07:37:45 +04:00
|
|
|
return bozo_http_error(httpd, 400, request,
|
2007-10-16 05:14:01 +04:00
|
|
|
"bad authorization field");
|
|
|
|
*pass++ = '\0';
|
2014-11-21 11:58:28 +03:00
|
|
|
free(request->hr_authuser);
|
|
|
|
free(request->hr_authpass);
|
2015-12-27 13:21:35 +03:00
|
|
|
request->hr_authuser = bozostrdup(httpd, request, authbuf);
|
|
|
|
request->hr_authpass = bozostrdup(httpd, request, pass);
|
2010-05-10 07:37:45 +04:00
|
|
|
debug((httpd, DEBUG_FAT,
|
2007-10-16 05:14:01 +04:00
|
|
|
"decoded authorization `%s' as `%s':`%s'",
|
|
|
|
str, request->hr_authuser, request->hr_authpass));
|
|
|
|
/* don't store in request->headers */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-04-18 11:28:24 +04:00
|
|
|
int
|
2010-05-10 18:44:19 +04:00
|
|
|
bozo_auth_check_special_files(bozo_httpreq_t *request,
|
2010-05-10 07:37:45 +04:00
|
|
|
const char *name)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
2010-05-10 18:44:19 +04:00
|
|
|
bozohttpd_t *httpd = request->hr_httpd;
|
|
|
|
|
2007-10-16 05:14:01 +04:00
|
|
|
if (strcmp(name, AUTH_FILE) == 0)
|
2010-05-10 07:37:45 +04:00
|
|
|
return bozo_http_error(httpd, 403, request,
|
|
|
|
"no permission to open authfile");
|
2009-04-18 11:28:24 +04:00
|
|
|
return 0;
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2010-05-10 18:44:19 +04:00
|
|
|
bozo_auth_check_401(bozo_httpreq_t *request, int code)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
2010-05-10 18:44:19 +04:00
|
|
|
bozohttpd_t *httpd = request->hr_httpd;
|
|
|
|
|
2007-10-16 05:14:01 +04:00
|
|
|
if (code == 401)
|
2010-05-10 07:37:45 +04:00
|
|
|
bozo_printf(httpd,
|
|
|
|
"WWW-Authenticate: Basic realm=\"%s\"\r\n",
|
2015-12-27 13:21:35 +03:00
|
|
|
request->hr_authrealm ?
|
|
|
|
request->hr_authrealm : "default realm");
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifndef NO_CGIBIN_SUPPORT
|
|
|
|
void
|
2010-05-10 18:44:19 +04:00
|
|
|
bozo_auth_cgi_setenv(bozo_httpreq_t *request,
|
2010-05-10 07:37:45 +04:00
|
|
|
char ***curenvpp)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
2010-05-10 18:44:19 +04:00
|
|
|
bozohttpd_t *httpd = request->hr_httpd;
|
|
|
|
|
2007-10-16 05:14:01 +04:00
|
|
|
if (request->hr_authuser && *request->hr_authuser) {
|
2010-05-10 07:37:45 +04:00
|
|
|
bozo_setenv(httpd, "AUTH_TYPE", "Basic", (*curenvpp)++);
|
|
|
|
bozo_setenv(httpd, "REMOTE_USER", request->hr_authuser,
|
|
|
|
(*curenvpp)++);
|
2007-10-16 05:14:01 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2010-05-10 07:37:45 +04:00
|
|
|
bozo_auth_cgi_count(bozo_httpreq_t *request)
|
2007-10-16 05:14:01 +04:00
|
|
|
{
|
|
|
|
return (request->hr_authuser && *request->hr_authuser) ? 2 : 0;
|
|
|
|
}
|
|
|
|
#endif /* NO_CGIBIN_SUPPORT */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Decode len bytes starting at in using base64 encoding into out.
|
|
|
|
* Result is *not* NUL terminated.
|
|
|
|
* Written by Luke Mewburn <lukem@NetBSD.org>
|
|
|
|
*/
|
|
|
|
const unsigned char decodetable[] = {
|
|
|
|
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
|
|
|
|
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
|
|
|
|
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
|
|
|
|
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 0, 255, 255,
|
|
|
|
255, 0, 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, 255, 255, 255, 255, 255,
|
|
|
|
255, 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, 255, 255, 255, 255, 255,
|
|
|
|
};
|
|
|
|
|
|
|
|
static ssize_t
|
|
|
|
base64_decode(const unsigned char *in, size_t ilen, unsigned char *out,
|
|
|
|
size_t olen)
|
|
|
|
{
|
|
|
|
unsigned char *cp;
|
|
|
|
size_t i;
|
|
|
|
|
2014-12-26 22:48:52 +03:00
|
|
|
if (ilen == 0) {
|
|
|
|
if (olen)
|
|
|
|
*out = '\0';
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-10-16 05:14:01 +04:00
|
|
|
cp = out;
|
|
|
|
for (i = 0; i < ilen; i += 4) {
|
|
|
|
if (cp + 3 > out + olen)
|
|
|
|
return (-1);
|
|
|
|
#define IN_CHECK(x) \
|
|
|
|
if ((x) > sizeof(decodetable) || decodetable[(x)] == 255) \
|
|
|
|
return(-1)
|
|
|
|
|
|
|
|
IN_CHECK(in[i + 0]);
|
2010-05-10 07:37:45 +04:00
|
|
|
/*LINTED*/
|
2007-10-16 05:14:01 +04:00
|
|
|
*(cp++) = decodetable[in[i + 0]] << 2
|
|
|
|
| decodetable[in[i + 1]] >> 4;
|
|
|
|
IN_CHECK(in[i + 1]);
|
2010-05-10 07:37:45 +04:00
|
|
|
/*LINTED*/
|
2007-10-16 05:14:01 +04:00
|
|
|
*(cp++) = decodetable[in[i + 1]] << 4
|
|
|
|
| decodetable[in[i + 2]] >> 2;
|
|
|
|
IN_CHECK(in[i + 2]);
|
|
|
|
*(cp++) = decodetable[in[i + 2]] << 6
|
|
|
|
| decodetable[in[i + 3]];
|
|
|
|
#undef IN_CHECK
|
|
|
|
}
|
2014-12-26 22:52:00 +03:00
|
|
|
while (i > 0 && in[i - 1] == '=')
|
2007-10-16 05:14:01 +04:00
|
|
|
cp--,i--;
|
|
|
|
return (cp - out);
|
|
|
|
}
|
|
|
|
#endif /* DO_HTPASSWD */
|