Hi all,
I'm trying to port my Windows program WiFi Password Recovery to Linux.
WiFi Password Recovery is a simple tool which scans all wireless networks
stored on the device and then returns their info (such as SSID, Auth
algorithm, *password...*).
To keep portability I'm developing it in C++ using wxWidgets library. In
particular on Linux I'm trying to use libnm to interface the program with
NetworkManager. Before starting the port I decided to write a small C
console program to learn libnm API and NetworkManager basis.
I'm trying to get the passwords of all wireless networks saved on Ubuntu
using libnm but when i call the function *nm_setting_wireless_security_get_psk
*it returns null. It doesn't work with debug dump functions of libnm too. I
think I should do something with NMSecretAgentOld but I don't understand
what exactly and how. I also did not find any example on the Internet. I
slightly modified a C example about using libnm available on internet and
this is my current test code:
/*
* The example shows how to list connections. Contrast this example with
* list-connections-gdbus.c, which is a bit lower level and talks directly to NM
* using GDBus.
*
* Compile with:
* gcc -Wall test.cpp -o test `pkg-config --libs --cflags libnm`
*/
#include <glib.h>#include <stdio.h>#include <stdlib.h>
#include <NetworkManager.h>#include <nm-secret-agent-old.h>
/* Print details of connection */static voidshow_connection
(NMConnection *connection){
printf("--- CONNECTION ---\n");
NMSettingWireless* s_con;
NMSettingWirelessSecurity* wifiSec;
const char* interfce;
interfce = nm_connection_get_interface_name(connection);
s_con = nm_connection_get_setting_wireless(connection);
if (s_con) {
GBytes* ssidBytes = nm_setting_wireless_get_ssid(s_con);
const char* ssid = nm_utils_ssid_to_utf8((guint8
*)g_bytes_get_data(ssidBytes, NULL), g_bytes_get_size(ssidBytes));
printf("SSID: %s\nInterface: %s\n", ssid, interfce);
wifiSec = nm_connection_get_setting_wireless_security(connection);
if(wifiSec){
const char* auth =
nm_setting_wireless_security_get_auth_alg(wifiSec);
const char* encrypt =
nm_setting_wireless_security_get_key_mgmt(wifiSec);
const char* psk =
nm_setting_wireless_security_get_psk(wifiSec); //THIS RETURNS NULL!
BUT THE WPA-PSK PASSWORD IS SET!
printf("Auth: %s\nEncryption: %s\nPassword: %s\n", auth,
encrypt, psk);
nm_connection_dump(connection); //Also in debug dump no
password field
}
}
}
intmain (int argc, char *argv[]){
NMClient *client;
GError *error = NULL;
const GPtrArray *connections;
int i;
#if !GLIB_CHECK_VERSION (2, 35, 0)
/* Initialize GType system */
g_type_init ();#endif
if (!(client = nm_client_new (NULL, &error))) {
g_message ("Error: Could not connect to NetworkManager: %s.",
error->message);
g_error_free (error);
return EXIT_FAILURE;
}
if (!nm_client_get_nm_running (client)) {
g_message ("Error: Can't obtain connections: NetworkManager is
not running.");
return EXIT_FAILURE;
}
/* Now the connections can be listed. */
connections = nm_client_get_connections (client);
printf ("Connections:\n===================\n");
for (i = 0; i < connections->len; i++)
show_connection ((NMConnection*) connections->pdata[i]);
g_object_unref (client);
return EXIT_SUCCESS;
}
This is the interesting part of program output: Program output image
<https://i.stack.imgur.com/GTGHY.png>
And this is the etc/NetworkManager/system_connections dump (where the
psk field is set): Wireless Network file dump image
<https://i.stack.imgur.com/A6qq2.png>
Thanks in advance and Best Regards,
Flavio
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