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/* tinyproxy - A fast light-weight HTTP proxy
* This file: Copyright (C) 2016-2017 rofl0r
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "main.h"
#include "basicauth.h"
#include "conns.h"
#include "heap.h"
#include "html-error.h"
#include "log.h"
#include "conf.h"
#include "base64.h"
/*
* Create basic-auth token in buf.
* Returns strlen of token on success,
* -1 if user/pass missing
* 0 if user/pass too long
*/
ssize_t basicauth_string(const char *user, const char *pass,
char *buf, size_t bufsize)
{
char tmp[256+2];
int l;
if (!user || !pass) return -1;
l = snprintf(tmp, sizeof tmp, "%s:%s", user, pass);
if (l < 0 || l >= (ssize_t) sizeof tmp) return 0;
if (bufsize < (BASE64ENC_BYTES((unsigned)l) + 1)) return 0;
base64enc(buf, tmp, l);
return BASE64ENC_BYTES(l);
}
/*
* Add entry to the basicauth list
*/
void basicauth_add (sblist *authlist,
const char *user, const char *pass)
{
char b[BASE64ENC_BYTES((256+2)-1) + 1], *s;
ssize_t ret;
ret = basicauth_string(user, pass, b, sizeof b);
if (ret == -1) {
log_message (LOG_WARNING,
"Illegal basicauth rule: missing user or pass");
return;
} else if (ret == 0) {
log_message (LOG_WARNING,
"User / pass in basicauth rule too long");
return;
}
if (!(s = safestrdup(b)) || !sblist_add(authlist, &s)) {
safefree(s);
log_message (LOG_ERR,
"Unable to allocate memory in basicauth_add()");
return;
}
log_message (LOG_INFO,
"Added basic auth user : %s", user);
}
/*
* Check if a user/password combination (encoded as base64)
* is in the basicauth list.
* return 1 on success, 0 on failure.
*/
int basicauth_check (sblist *authlist, const char *authstring)
{
size_t i;
char** entry;
if (!authlist) return 0;
for (i = 0; i < sblist_getsize(authlist); i++) {
entry = sblist_get (authlist, i);
if (entry && strcmp (authstring, *entry) == 0)
return 1;
}
return 0;
}
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