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/*
Copyright (c) 2007-2013 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.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <dlfcn.h>
#include <errno.h>
#include "authenticate.h"
#include "server-messages.h"
static int
init (dict_t *this, char *key, data_t *value, void *data)
{
void *handle = NULL;
char *auth_file = NULL;
auth_handle_t *auth_handle = NULL;
auth_fn_t authenticate = NULL;
int *error = NULL;
int ret = 0;
/* It gets over written */
error = data;
if (!strncasecmp (key, "ip", strlen ("ip"))) {
gf_msg ("authenticate", GF_LOG_ERROR, 0,
PS_MSG_AUTHENTICATE_ERROR, "AUTHENTICATION MODULE "
"\"IP\" HAS BEEN REPLACED BY \"ADDR\"");
dict_set (this, key, data_from_dynptr (NULL, 0));
/* TODO: 1.3.x backward compatibility */
// *error = -1;
// return;
key = "addr";
}
ret = gf_asprintf (&auth_file, "%s/%s.so", LIBDIR, key);
if (-1 == ret) {
dict_set (this, key, data_from_dynptr (NULL, 0));
*error = -1;
return -1;
}
handle = dlopen (auth_file, RTLD_LAZY);
if (!handle) {
gf_msg ("authenticate", GF_LOG_ERROR, 0,
PS_MSG_AUTHENTICATE_ERROR, "dlopen(%s): %s\n",
auth_file, dlerror ());
dict_set (this, key, data_from_dynptr (NULL, 0));
GF_FREE (auth_file);
*error = -1;
return -1;
}
GF_FREE (auth_file);
authenticate = dlsym (handle, "gf_auth");
if (!authenticate) {
gf_msg ("authenticate", GF_LOG_ERROR, 0,
PS_MSG_AUTHENTICATE_ERROR, "dlsym(gf_auth) on %s\n",
dlerror ());
dict_set (this, key, data_from_dynptr (NULL, 0));
dlclose (handle);
*error = -1;
return -1;
}
auth_handle = GF_CALLOC (1, sizeof (*auth_handle),
gf_common_mt_auth_handle_t);
if (!auth_handle) {
dict_set (this, key, data_from_dynptr (NULL, 0));
*error = -1;
dlclose (handle);
return -1;
}
auth_handle->vol_opt = GF_CALLOC (1, sizeof (volume_opt_list_t),
gf_common_mt_volume_opt_list_t);
if (!auth_handle->vol_opt) {
dict_set (this, key, data_from_dynptr (NULL, 0));
*error = -1;
GF_FREE (auth_handle);
dlclose (handle);
return -1;
}
auth_handle->vol_opt->given_opt = dlsym (handle, "options");
if (auth_handle->vol_opt->given_opt == NULL) {
gf_msg_debug ("authenticate", 0, "volume option validation "
"not specified");
}
auth_handle->authenticate = authenticate;
auth_handle->handle = handle;
dict_set (this, key,
data_from_dynptr (auth_handle, sizeof (*auth_handle)));
return 0;
}
static int
fini (dict_t *this, char *key, data_t *value, void *data)
{
auth_handle_t *handle = data_to_ptr (value);
if (handle) {
dlclose (handle->handle);
}
return 0;
}
static int
_gf_auth_option_validate (dict_t *d, char *k, data_t *v, void *tmp)
{
auth_handle_t *handle = NULL;
xlator_t *xl = NULL;
int ret = 0;
xl = tmp;
handle = data_to_ptr (v);
if (!handle)
return 0;
list_add_tail (&(handle->vol_opt->list), &(xl->volume_options));
ret = xlator_options_validate_list (xl, xl->options,
handle->vol_opt, NULL);
if (ret) {
gf_msg ("authenticate", GF_LOG_ERROR, 0,
PS_MSG_VOL_VALIDATE_FAILED, "volume option validation "
"failed");
return -1;
}
return 0;
}
int32_t
gf_auth_init (xlator_t *xl, dict_t *auth_modules)
{
int ret = 0;
dict_foreach (auth_modules, init, &ret);
if (ret)
goto out;
ret = dict_foreach (auth_modules, _gf_auth_option_validate, xl);
out:
if (ret) {
gf_msg (xl->name, GF_LOG_ERROR, 0, PS_MSG_AUTH_INIT_FAILED,
"authentication init failed");
dict_foreach (auth_modules, fini, &ret);
ret = -1;
}
return ret;
}
typedef struct {
dict_t *iparams;
dict_t *cparams;
int64_t result;
} gf_auth_args_t;
static int
gf_auth_one_method (dict_t *this, char *key, data_t *value, void *data)
{
gf_auth_args_t *args = data;
auth_handle_t *handle = NULL;
if (!value) {
return 0;
}
handle = data_to_ptr (value);
if (!handle || !handle->authenticate) {
return 0;
}
switch (handle->authenticate (args->iparams, args->cparams)) {
case AUTH_ACCEPT:
if (args->result != AUTH_REJECT) {
args->result = AUTH_ACCEPT;
}
/* FALLTHROUGH */
default:
return 0;
case AUTH_REJECT:
args->result = AUTH_REJECT;
return -1;
}
}
auth_result_t
gf_authenticate (dict_t *input_params,
dict_t *config_params,
dict_t *auth_modules)
{
char *name = NULL;
data_t *peerinfo_data = NULL;
gf_auth_args_t args;
args.iparams = input_params;
args.cparams = config_params;
args.result = AUTH_DONT_CARE;
dict_foreach (auth_modules, gf_auth_one_method, &args);
if (AUTH_DONT_CARE == args.result) {
peerinfo_data = dict_get (input_params, "peer-info-name");
if (peerinfo_data) {
name = peerinfo_data->data;
}
gf_msg ("auth", GF_LOG_ERROR, 0, PS_MSG_REMOTE_CLIENT_REFUSED,
"no authentication module is interested in "
"accepting remote-client %s", name);
args.result = AUTH_REJECT;
}
return args.result;
}
void
gf_auth_fini (dict_t *auth_modules)
{
int32_t dummy;
dict_foreach (auth_modules, fini, &dummy);
}
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