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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include <fnmatch.h>
#include "authenticate.h"
auth_result_t gf_auth (dict_t *input_params, dict_t *config_params)
{
auth_result_t result = AUTH_DONT_CARE;
int ret = 0;
data_t *allow_user = NULL;
data_t *username_data = NULL;
data_t *passwd_data = NULL;
data_t *password_data = NULL;
char *username = NULL;
char *password = NULL;
char *brick_name = NULL;
char *searchstr = NULL;
char *username_str = NULL;
char *tmp = NULL;
char *username_cpy = NULL;
gf_boolean_t using_ssl = _gf_false;
username_data = dict_get (input_params, "ssl-name");
if (username_data) {
gf_log ("auth/login", GF_LOG_INFO,
"connecting user name: %s", username_data->data);
using_ssl = _gf_true;
}
else {
username_data = dict_get (input_params, "username");
if (!username_data) {
gf_log ("auth/login", GF_LOG_DEBUG,
"username not found, returning DONT-CARE");
goto out;
}
password_data = dict_get (input_params, "password");
if (!password_data) {
gf_log ("auth/login", GF_LOG_WARNING,
"password not found, returning DONT-CARE");
goto out;
}
password = data_to_str (password_data);
}
username = data_to_str (username_data);
brick_name = data_to_str (dict_get (input_params, "remote-subvolume"));
if (!brick_name) {
gf_log ("auth/login", GF_LOG_ERROR,
"remote-subvolume not specified");
result = AUTH_REJECT;
goto out;
}
ret = gf_asprintf (&searchstr, "auth.login.%s.%s", brick_name,
using_ssl ? "ssl-allow" : "allow");
if (-1 == ret) {
gf_log ("auth/login", GF_LOG_WARNING,
"asprintf failed while setting search string, "
"returning DONT-CARE");
goto out;
}
allow_user = dict_get (config_params, searchstr);
GF_FREE (searchstr);
if (allow_user) {
gf_log ("auth/login", GF_LOG_INFO,
"allowed user names: %s", allow_user->data);
/*
* There's a subtle difference between SSL and non-SSL behavior
* if we can't match anything in the "while" loop below.
* Intuitively, we should AUTH_REJECT if there's no match.
* However, existing code depends on allowing untrusted users
* to connect with *no credentials at all* by falling through
* the loop. They're still distinguished from trusted users
* who do provide a valid username and password (in fact that's
* pretty much the only thing we use non-SSL login auth for),
* but they are allowed to connect. It's wrong, but it's not
* worth changing elsewhere. Therefore, we do the sane thing
* only for SSL here.
*
* For SSL, if there's a list *you must be on it*. Note that
* if there's no list we don't care. In that case (and the
* ssl-allow=* case as well) authorization is effectively
* disabled, though authentication and encryption are still
* active.
*/
if (using_ssl) {
result = AUTH_REJECT;
}
username_cpy = gf_strdup (allow_user->data);
if (!username_cpy)
goto out;
username_str = strtok_r (username_cpy, " ,", &tmp);
/*
* We have to match a user's *authenticated* name to one in the
* list. If we're using SSL, they're already authenticated.
* Otherwise, they need a matching password to complete the
* process.
*/
while (username_str) {
if (!fnmatch (username_str, username, 0)) {
if (using_ssl) {
result = AUTH_ACCEPT;
break;
}
ret = gf_asprintf (&searchstr,
"auth.login.%s.password",
username);
if (-1 == ret) {
gf_log ("auth/login", GF_LOG_WARNING,
"asprintf failed while setting search string");
goto out;
}
passwd_data = dict_get (config_params, searchstr);
GF_FREE (searchstr);
if (!passwd_data) {
gf_log ("auth/login", GF_LOG_ERROR,
"wrong username/password combination");
result = AUTH_REJECT;
goto out;
}
result = !((strcmp (data_to_str (passwd_data),
password)) ?
AUTH_ACCEPT :
AUTH_REJECT);
if (result == AUTH_REJECT)
gf_log ("auth/login", GF_LOG_ERROR,
"wrong password for user %s",
username);
break;
}
username_str = strtok_r (NULL, " ,", &tmp);
}
}
out:
GF_FREE (username_cpy);
return result;
}
struct volume_options options[] = {
{ .key = {"auth.login.*.allow"},
.type = GF_OPTION_TYPE_ANY
},
{ .key = {"auth.login.*.password"},
.type = GF_OPTION_TYPE_ANY
},
{ .key = {NULL} }
};
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