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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
* Copyright 2011 Red Hat, Inc.
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "nm-vpn-plugin-utils.h"
#include "nm-vpn-plugin.h"
#include "nm-setting-private.h"
#include "nm-dbus-glib-types.h"
#define DATA_KEY_TAG "DATA_KEY="
#define DATA_VAL_TAG "DATA_VAL="
#define SECRET_KEY_TAG "SECRET_KEY="
#define SECRET_VAL_TAG "SECRET_VAL="
static void
free_secret (gpointer data)
{
char *secret = data;
memset (secret, 0, strlen (secret));
g_free (secret);
}
/**
* nm_vpn_plugin_utils_read_vpn_details:
* @fd: file descriptor to read from, usually stdin (0)
* @out_data: (out) (transfer full): on successful return, a hash table
* (mapping char*:char*) containing the key/value pairs of VPN data items
* @out_secrets: (out) (transfer full): on successful return, a hash table
* (mapping char*:char*) containing the key/value pairsof VPN secrets
*
* Parses key/value pairs from a file descriptor (normally stdin) passed by
* an applet when the applet calls the authentication dialog of the VPN plugin.
*
* Returns: %TRUE if reading values was successful, %FALSE if not
**/
gboolean
nm_vpn_plugin_utils_read_vpn_details (int fd,
GHashTable **out_data,
GHashTable **out_secrets)
{
GHashTable *data, *secrets;
gboolean success = FALSE;
char *key = NULL, *val = NULL;
GString *line;
gchar c;
if (out_data)
g_return_val_if_fail (*out_data == NULL, FALSE);
if (out_secrets)
g_return_val_if_fail (*out_secrets == NULL, FALSE);
data = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
secrets = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, free_secret);
line = g_string_new (NULL);
/* Read stdin for data and secret items until we get a DONE */
while (1) {
ssize_t nr;
GHashTable *hash = NULL;
errno = 0;
nr = read (fd, &c, 1);
if (nr == -1) {
if (errno == EAGAIN) {
g_usleep (100);
continue;
}
break;
}
if (c != '\n') {
g_string_append_c (line, c);
continue;
}
/* Check for the finish marker */
if (strcmp (line->str, "DONE") == 0)
break;
/* Otherwise it's a data/secret item */
if (strncmp (line->str, DATA_KEY_TAG, strlen (DATA_KEY_TAG)) == 0) {
hash = data;
key = g_strdup (line->str + strlen (DATA_KEY_TAG));
} else if (strncmp (line->str, DATA_VAL_TAG, strlen (DATA_VAL_TAG)) == 0) {
hash = data;
val = g_strdup (line->str + strlen (DATA_VAL_TAG));
} else if (strncmp (line->str, SECRET_KEY_TAG, strlen (SECRET_KEY_TAG)) == 0) {
hash = secrets;
key = g_strdup (line->str + strlen (SECRET_KEY_TAG));
} else if (strncmp (line->str, SECRET_VAL_TAG, strlen (SECRET_VAL_TAG)) == 0) {
hash = secrets;
val = g_strdup (line->str + strlen (SECRET_VAL_TAG));
}
g_string_truncate (line, 0);
if (key && val && hash) {
g_hash_table_insert (hash, key, val);
key = NULL;
val = NULL;
success = TRUE; /* Got at least one value */
}
}
if (success) {
if (out_data)
*out_data = data;
else
g_hash_table_destroy (data);
if (out_secrets)
*out_secrets = secrets;
else
g_hash_table_destroy (secrets);
} else {
g_hash_table_destroy (data);
g_hash_table_destroy (secrets);
}
g_string_free (line, TRUE);
return success;
}
/**
* nm_vpn_plugin_utils_get_secret_flags:
* @data: hash table containing VPN key/value pair data items
* @secret_name: VPN secret key name for which to retrieve flags for
* @out_flags: (out): on success, the flags associated with @secret_name
*
* Given a VPN secret key name, attempts to find the corresponding flags data
* item in @data. If found, converts the flags data item to
* #NMSettingSecretFlags and returns it.
*
* Returns: %TRUE if the flag data item was found and successfully converted
* to flags, %FALSE if not
**/
gboolean
nm_vpn_plugin_utils_get_secret_flags (GHashTable *data,
const char *secret_name,
NMSettingSecretFlags *out_flags)
{
char *flag_name;
const char *val;
unsigned long tmp;
gboolean success = FALSE;
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (secret_name != NULL, FALSE);
g_return_val_if_fail (out_flags != NULL, FALSE);
g_return_val_if_fail (*out_flags == NM_SETTING_SECRET_FLAG_NONE, FALSE);
flag_name = g_strdup_printf ("%s-flags", secret_name);
/* Try new flags value first */
val = g_hash_table_lookup (data, flag_name);
if (val) {
errno = 0;
tmp = strtoul (val, NULL, 10);
if (errno == 0 && tmp <= NM_SETTING_SECRET_FLAGS_ALL) {
*out_flags = (NMSettingSecretFlags) tmp;
success = TRUE;
}
}
g_free (flag_name);
return success;
}
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