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#![cfg(windows)]
use std::{ffi::OsStr, io, os::windows::ffi::OsStrExt, ptr};
use winapi::{
shared::{minwindef::DWORD, winerror::ERROR_SUCCESS},
um::{
accctrl::*,
aclapi::{SetEntriesInAclW, SetSecurityInfo},
fileapi::{CreateFileW, OPEN_EXISTING},
handleapi::{CloseHandle, INVALID_HANDLE_VALUE},
securitybaseapi::{AllocateAndInitializeSid, FreeSid},
winbase::LocalFree,
winnt::*,
},
};
struct Sid {
sid_ptr: PSID,
}
impl Sid {
pub fn new(authority: PSID_IDENTIFIER_AUTHORITY, relative_id: DWORD) -> Result<Sid, io::Error> {
let mut sid = Sid {
sid_ptr: ptr::null_mut(),
};
let result = unsafe {
AllocateAndInitializeSid(
authority,
1,
relative_id,
0,
0,
0,
0,
0,
0,
0,
&mut sid.sid_ptr as *mut _,
)
};
if result != 0 {
Ok(sid)
} else {
Err(io::Error::last_os_error())
}
}
pub fn as_ptr(&self) -> PSID {
self.sid_ptr
}
}
impl Drop for Sid {
fn drop(&mut self) {
unsafe { FreeSid(self.sid_ptr) };
}
}
struct WinHandle(HANDLE);
impl WinHandle {
pub fn get_raw(&self) -> HANDLE {
self.0
}
}
impl Drop for WinHandle {
fn drop(&mut self) {
unsafe { CloseHandle(self.0) };
}
}
pub fn deny_network_access<T: AsRef<OsStr>>(ipc_path: T) -> Result<(), io::Error> {
let mut ipc_w: Vec<_> = ipc_path.as_ref().encode_wide().collect();
ipc_w.push(0u16);
let pipe_handle = unsafe {
CreateFileW(
ipc_w.as_ptr(),
GENERIC_WRITE | WRITE_DAC,
0,
ptr::null_mut(),
OPEN_EXISTING,
0,
ptr::null_mut(),
)
};
if pipe_handle == INVALID_HANDLE_VALUE {
return Err(io::Error::last_os_error());
}
let pipe_handle = WinHandle(pipe_handle);
let network_sid = Sid::new(
SECURITY_NT_AUTHORITY.as_mut_ptr() as *mut _,
SECURITY_NETWORK_RID,
)?;
let mut network_access: EXPLICIT_ACCESS_W = unsafe { std::mem::zeroed() };
network_access.grfAccessPermissions = GENERIC_READ | GENERIC_WRITE;
network_access.grfAccessMode = DENY_ACCESS;
network_access.grfInheritance = NO_INHERITANCE;
network_access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
network_access.Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
network_access.Trustee.ptstrName = network_sid.as_ptr() as *mut _;
let network_svc_sid = Sid::new(
SECURITY_NT_AUTHORITY.as_mut_ptr() as *mut _,
SECURITY_NETWORK_SERVICE_RID,
)?;
let mut network_svc_access: EXPLICIT_ACCESS_W = unsafe { std::mem::zeroed() };
network_svc_access.grfAccessPermissions = GENERIC_READ | GENERIC_WRITE;
network_svc_access.grfAccessMode = DENY_ACCESS;
network_svc_access.grfInheritance = NO_INHERITANCE;
network_svc_access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
network_svc_access.Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
network_svc_access.Trustee.ptstrName = network_svc_sid.as_ptr() as *mut _;
let everyone_sid = Sid::new(
SECURITY_WORLD_SID_AUTHORITY.as_mut_ptr() as *mut _,
SECURITY_WORLD_RID,
)?;
let mut world_access: EXPLICIT_ACCESS_W = unsafe { std::mem::zeroed() };
world_access.grfAccessPermissions = GENERIC_READ | GENERIC_WRITE;
world_access.grfAccessMode = SET_ACCESS;
world_access.grfInheritance = NO_INHERITANCE;
world_access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
world_access.Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
world_access.Trustee.ptstrName = everyone_sid.as_ptr() as *mut _;
let mut ace_entries = vec![network_access, network_svc_access, world_access];
let mut new_dacl: PACL = unsafe { std::mem::zeroed() };
let result = unsafe {
SetEntriesInAclW(
ace_entries.len() as u32,
ace_entries.as_mut_ptr(),
ptr::null_mut(),
&mut new_dacl as *mut PACL,
)
};
if result != ERROR_SUCCESS {
return Err(io::Error::from_raw_os_error(result as i32));
}
let result = unsafe {
SetSecurityInfo(
pipe_handle.get_raw(),
SE_KERNEL_OBJECT,
DACL_SECURITY_INFORMATION,
ptr::null_mut(),
ptr::null_mut(),
new_dacl as *mut ACL,
ptr::null_mut(),
)
};
unsafe { LocalFree(new_dacl as *mut _) };
if result != ERROR_SUCCESS {
return Err(io::Error::from_raw_os_error(result as i32));
}
Ok(())
}
|
