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|
// Take a look at the license at the top of the repository in the LICENSE file.
use crate::sys::utils::to_str;
use crate::{
common::{Gid, Uid},
windows::sid::Sid,
User,
};
use std::ptr::null_mut;
use winapi::shared::lmcons::{MAX_PREFERRED_LENGTH, NET_API_STATUS};
use winapi::shared::minwindef::{DWORD, LPBYTE};
use winapi::shared::ntstatus::STATUS_SUCCESS;
use winapi::shared::winerror::ERROR_MORE_DATA;
use winapi::um::lmaccess::{
NetUserEnum, NetUserGetInfo, NetUserGetLocalGroups, LOCALGROUP_USERS_INFO_0, USER_INFO_23,
};
use winapi::um::lmaccess::{FILTER_NORMAL_ACCOUNT, LG_INCLUDE_INDIRECT, USER_INFO_0};
use winapi::um::lmapibuf::NetApiBufferFree;
use winapi::um::ntlsa::{
LsaEnumerateLogonSessions, LsaFreeReturnBuffer, LsaGetLogonSessionData,
SECURITY_LOGON_SESSION_DATA,
};
use winapi::um::winnt::{LPWSTR, LUID};
// FIXME: Can be removed once merged in winapi.
#[allow(non_upper_case_globals)]
const NERR_Success: NET_API_STATUS = 0;
struct NetApiBuffer<T>(*mut T);
impl<T> Drop for NetApiBuffer<T> {
fn drop(&mut self) {
unsafe {
if !self.0.is_null() {
NetApiBufferFree(self.0 as *mut _);
}
}
}
}
impl<T> Default for NetApiBuffer<T> {
fn default() -> Self {
Self(null_mut())
}
}
impl<T> NetApiBuffer<T> {
pub fn inner_mut(&mut self) -> &mut *mut T {
assert!(self.0.is_null());
&mut self.0
}
pub unsafe fn inner_mut_as_bytes(&mut self) -> &mut LPBYTE {
// https://doc.rust-lang.org/std/mem/fn.transmute.html
// Turning an &mut T into an &mut U:
&mut *(self.inner_mut() as *mut *mut T as *mut LPBYTE)
}
}
struct LsaBuffer<T>(*mut T);
impl<T> Drop for LsaBuffer<T> {
fn drop(&mut self) {
unsafe {
if !self.0.is_null() {
LsaFreeReturnBuffer(self.0 as *mut _);
}
}
}
}
impl<T> Default for LsaBuffer<T> {
fn default() -> Self {
Self(null_mut())
}
}
impl<T> LsaBuffer<T> {
pub fn inner_mut(&mut self) -> &mut *mut T {
assert!(self.0.is_null());
&mut self.0
}
}
unsafe fn get_groups_for_user(username: LPWSTR) -> Vec<String> {
let mut buf: NetApiBuffer<LOCALGROUP_USERS_INFO_0> = Default::default();
let mut nb_entries = 0;
let mut total_entries = 0;
let mut groups;
let status = NetUserGetLocalGroups(
[0u16].as_ptr(),
username,
0,
LG_INCLUDE_INDIRECT,
buf.inner_mut_as_bytes(),
MAX_PREFERRED_LENGTH,
&mut nb_entries,
&mut total_entries,
);
if status == NERR_Success {
groups = Vec::with_capacity(nb_entries as _);
if !buf.0.is_null() {
let entries = std::slice::from_raw_parts(buf.0, nb_entries as _);
groups.extend(entries.iter().map(|entry| to_str(entry.lgrui0_name)));
}
} else {
groups = Vec::new();
sysinfo_debug!("NetUserGetLocalGroups failed with ret code {}", status);
}
groups
}
pub unsafe fn get_users() -> Vec<User> {
let mut users = Vec::new();
let mut resume_handle: DWORD = 0;
loop {
let mut buffer: NetApiBuffer<USER_INFO_0> = Default::default();
let mut nb_read = 0;
let mut total = 0;
let status = NetUserEnum(
null_mut(),
0,
FILTER_NORMAL_ACCOUNT,
buffer.inner_mut_as_bytes(),
MAX_PREFERRED_LENGTH,
&mut nb_read,
&mut total,
&mut resume_handle,
);
if status == NERR_Success || status == ERROR_MORE_DATA {
let entries = std::slice::from_raw_parts(buffer.0, nb_read as _);
for entry in entries {
if entry.usri0_name.is_null() {
continue;
}
let mut user: NetApiBuffer<USER_INFO_23> = Default::default();
if NetUserGetInfo(null_mut(), entry.usri0_name, 23, user.inner_mut_as_bytes())
== NERR_Success
{
if let Some(sid) = Sid::from_psid((*user.0).usri23_user_sid) {
// Get the account name from the SID (because it's usually
// a better name), but fall back to the name we were given
// if this fails.
let name = sid
.account_name()
.unwrap_or_else(|| to_str(entry.usri0_name));
users.push(User {
uid: Uid(sid),
gid: Gid(0),
name,
groups: get_groups_for_user(entry.usri0_name),
});
}
}
}
} else {
sysinfo_debug!(
"NetUserEnum error: {}",
if status == winapi::shared::winerror::ERROR_ACCESS_DENIED {
"access denied"
} else if status == winapi::shared::winerror::ERROR_INVALID_LEVEL {
"invalid level"
} else {
"unknown error"
}
);
}
if status != ERROR_MORE_DATA {
break;
}
}
// First part done. Second part now!
let mut nb_sessions = 0;
let mut uids: LsaBuffer<LUID> = Default::default();
if LsaEnumerateLogonSessions(&mut nb_sessions, uids.inner_mut()) != STATUS_SUCCESS {
sysinfo_debug!("LsaEnumerateLogonSessions failed");
} else {
let entries = std::slice::from_raw_parts_mut(uids.0, nb_sessions as _);
for entry in entries {
let mut data: LsaBuffer<SECURITY_LOGON_SESSION_DATA> = Default::default();
if LsaGetLogonSessionData(entry, data.inner_mut()) == STATUS_SUCCESS
&& !data.0.is_null()
{
let data = *data.0;
if data.LogonType == winapi::um::ntlsa::Network {
continue;
}
let sid = match Sid::from_psid(data.Sid) {
Some(sid) => sid,
None => continue,
};
if users.iter().any(|u| u.uid.0 == sid) {
continue;
}
// Get the account name from the SID (because it's usually
// a better name), but fall back to the name we were given
// if this fails.
let name = sid.account_name().unwrap_or_else(|| {
String::from_utf16(std::slice::from_raw_parts(
data.UserName.Buffer,
data.UserName.Length as usize / std::mem::size_of::<u16>(),
))
.unwrap_or_else(|_err| {
sysinfo_debug!("Failed to convert from UTF-16 string: {}", _err);
String::new()
})
});
users.push(User {
uid: Uid(sid),
gid: Gid(0),
name,
// There is no local groups for a non-local user.
groups: Vec::new(),
});
}
}
}
users
}
|
