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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* 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.
*
* Copyright (C) 2006 - 2012 Red Hat, Inc.
*/
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "nm-supplicant-settings-verify.h"
struct Opt {
const char * key;
const OptType type;
const gint32 int_low; /* Inclusive */
const gint32 int_high; /* Inclusive; max length for strings */
const gboolean str_allowed_multiple;
const char ** str_allowed;
};
static gboolean validate_type_int (const struct Opt * opt,
const char * value,
const guint32 len);
static gboolean validate_type_bytes (const struct Opt * opt,
const char * value,
const guint32 len);
static gboolean validate_type_utf8 (const struct Opt *opt,
const char * value,
const guint32 len);
static gboolean validate_type_keyword (const struct Opt * opt,
const char * value,
const guint32 len);
typedef gboolean (*validate_func)(const struct Opt *, const char *, const guint32);
struct validate_entry {
const OptType type;
const validate_func func;
};
static const struct validate_entry validate_table[] = {
{ TYPE_INT, validate_type_int },
{ TYPE_BYTES, validate_type_bytes },
{ TYPE_UTF8, validate_type_utf8 },
{ TYPE_KEYWORD, validate_type_keyword },
};
const char * pairwise_allowed[] = { "CCMP", "TKIP", "NONE", NULL };
const char * group_allowed[] = { "CCMP", "TKIP", "WEP104", "WEP40", NULL };
const char * proto_allowed[] = { "WPA", "RSN", NULL };
const char * key_mgmt_allowed[] = { "WPA-PSK", "WPA-EAP", "IEEE8021X", "WPA-NONE",
"NONE", NULL };
const char * auth_alg_allowed[] = { "OPEN", "SHARED", "LEAP", NULL };
const char * eap_allowed[] = { "LEAP", "MD5", "TLS", "PEAP", "TTLS", "SIM",
"PSK", "FAST", NULL };
const char * phase1_allowed[] = {"peapver=0", "peapver=1", "peaplabel=1",
"peap_outer_success=0", "include_tls_length=1",
"sim_min_num_chal=3", "fast_provisioning=0",
"fast_provisioning=1", "fast_provisioning=2",
"fast_provisioning=3", NULL };
const char * phase2_allowed[] = {"auth=PAP", "auth=CHAP", "auth=MSCHAP",
"auth=MSCHAPV2", "auth=GTC", "auth=OTP",
"auth=MD5", "auth=TLS", "autheap=MD5",
"autheap=MSCHAPV2", "autheap=OTP",
"autheap=GTC", "autheap=TLS", NULL };
static const struct Opt opt_table[] = {
{ "ssid", TYPE_BYTES, 0, 32,FALSE, NULL },
{ "bssid", TYPE_KEYWORD, 0, 0, FALSE, NULL },
{ "scan_ssid", TYPE_INT, 0, 1, FALSE, NULL },
{ "mode", TYPE_INT, 0, 1, FALSE, NULL },
{ "frequency", TYPE_INT, 2412, 5825, FALSE, NULL },
{ "auth_alg", TYPE_KEYWORD, 0, 0, FALSE, auth_alg_allowed },
{ "psk", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "pairwise", TYPE_KEYWORD, 0, 0, FALSE, pairwise_allowed },
{ "group", TYPE_KEYWORD, 0, 0, FALSE, group_allowed },
{ "proto", TYPE_KEYWORD, 0, 0, FALSE, proto_allowed },
{ "key_mgmt", TYPE_KEYWORD, 0, 0, FALSE, key_mgmt_allowed },
{ "wep_key0", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "wep_key1", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "wep_key2", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "wep_key3", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "wep_tx_keyidx", TYPE_INT, 0, 3, FALSE, NULL },
{ "eapol_flags", TYPE_INT, 0, 3, FALSE, NULL },
{ "eap", TYPE_KEYWORD, 0, 0, FALSE, eap_allowed },
{ "identity", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "password", TYPE_UTF8, 0, 0, FALSE, NULL },
{ "ca_path", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "subject_match", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "altsubject_match", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "ca_cert", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "client_cert", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "private_key", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "private_key_passwd", TYPE_BYTES, 0, 1024, FALSE, NULL },
{ "phase1", TYPE_KEYWORD, 0, 0, TRUE, phase1_allowed },
{ "phase2", TYPE_KEYWORD, 0, 0, TRUE, phase2_allowed },
{ "anonymous_identity", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "ca_path2", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "subject_match2", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "altsubject_match2", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "ca_cert2", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "client_cert2", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "private_key2", TYPE_BYTES, 0, 65536, FALSE, NULL },
{ "private_key2_passwd",TYPE_BYTES, 0, 1024, FALSE, NULL },
{ "pin", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "pcsc", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "nai", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "eappsk", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "pac_file", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "engine", TYPE_INT, 0, 1, FALSE, NULL },
{ "engine_id", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "key_id", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "fragment_size", TYPE_INT, 1, 2000, FALSE, NULL },
{ "proactive_key_caching", TYPE_INT, 0, 1, FALSE, NULL },
{ "bgscan", TYPE_BYTES, 0, 0, FALSE, NULL },
{ "pac_file", TYPE_BYTES, 0, 1024, FALSE, NULL },
};
static gboolean
validate_type_int (const struct Opt * opt,
const char * value,
const guint32 len)
{
long int intval;
g_return_val_if_fail (opt != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
errno = 0;
intval = strtol (value, NULL, 10);
if (errno != 0)
return FALSE;
/* strtol returns a long, but we are dealing with ints */
if (intval > INT_MAX || intval < INT_MIN)
return FALSE;
if (intval > opt->int_high || intval < opt->int_low)
return FALSE;
return TRUE;
}
static gboolean
validate_type_bytes (const struct Opt * opt,
const char * value,
const guint32 len)
{
guint32 check_len;
g_return_val_if_fail (opt != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
check_len = opt->int_high ? opt->int_high : 255;
if (len > check_len)
return FALSE;
return TRUE;
}
static gboolean
validate_type_utf8 (const struct Opt *opt,
const char * value,
const guint32 len)
{
guint32 check_len;
g_return_val_if_fail (opt != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
check_len = opt->int_high ? opt->int_high : 255;
/* Note that we deliberately don't validate the UTF-8, because
some "UTF-8" fields, such as 8021x.password, do not actually
have to be valid UTF-8 */
if (g_utf8_strlen (value, len) > check_len)
return FALSE;
return TRUE;
}
static gboolean
validate_type_keyword (const struct Opt * opt,
const char * value,
const guint32 len)
{
char ** allowed;
gchar ** candidates = NULL;
char ** candidate;
gboolean found = FALSE;
g_return_val_if_fail (opt != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
/* Allow everything */
if (!opt->str_allowed)
return TRUE;
candidates = g_strsplit (value, " ", 0);
if (!candidates)
goto out;
/* validate each space-separated word in 'value' */
for (candidate = candidates; *candidate; candidate++) {
found = FALSE;
for (allowed = (char **) opt->str_allowed; *allowed; allowed++) {
if (strcmp (*candidate, *allowed) == 0) {
found = TRUE;
break;
}
}
if (!found)
break;
}
out:
g_strfreev (candidates);
return found;
}
OptType
nm_supplicant_settings_verify_setting (const char * key,
const char * value,
const guint32 len)
{
OptType type = TYPE_INVALID;
int opt_count = sizeof (opt_table) / sizeof (opt_table[0]);
int val_count = sizeof (validate_table) / sizeof (validate_table[0]);
int i, j;
g_return_val_if_fail (key != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
for (i = 0; i < opt_count; i++) {
if (strcmp (opt_table[i].key, key) != 0)
continue;
for (j = 0; j < val_count; j++) {
if (validate_table[j].type == opt_table[i].type) {
if ((*(validate_table[j].func))(&opt_table[i], value, len)) {
type = opt_table[i].type;
break;
}
}
}
}
return type;
}
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