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/* setlsapwd.cc: Set LSA private data password for current user.
Copyright 2008, 2009, 2011, 2014 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include "shared_info.h"
#include "cygerrno.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "security.h"
#include "cygserver_setpwd.h"
#include "pwdgrp.h"
#include "ntdll.h"
#include <ntsecapi.h>
#include <stdlib.h>
#include <wchar.h>
/*
* client_request_setpwd Constructor
*/
client_request_setpwd::client_request_setpwd (PUNICODE_STRING passwd)
: client_request (CYGSERVER_REQUEST_SETPWD, &_parameters, sizeof (_parameters))
{
memset (_parameters.in.passwd, 0, sizeof _parameters.in.passwd);
if (passwd->Length > 0 && passwd->Length < 256 * sizeof (WCHAR))
wcpncpy (_parameters.in.passwd, passwd->Buffer, 255);
msglen (sizeof (_parameters.in));
}
unsigned long
setlsapwd (const char *passwd, const char *username)
{
unsigned long ret = (unsigned long) -1;
HANDLE lsa;
WCHAR sid[128];
WCHAR key_name[128 + wcslen (CYGWIN_LSA_KEY_PREFIX)];
PWCHAR data_buf = NULL;
UNICODE_STRING key;
UNICODE_STRING data;
if (username)
{
cygsid psid;
struct passwd *pw = internal_getpwnam (username, false);
if (!pw || !psid.getfrompw (pw))
{
set_errno (ENOENT);
return ret;
}
wcpcpy (wcpcpy (key_name, CYGWIN_LSA_KEY_PREFIX), psid.string (sid));
}
else
wcpcpy (wcpcpy (key_name, CYGWIN_LSA_KEY_PREFIX),
cygheap->user.get_windows_id (sid));
RtlInitUnicodeString (&key, key_name);
if (!passwd || ! *passwd
|| sys_mbstowcs_alloc (&data_buf, HEAP_NOTHEAP, passwd))
{
memset (&data, 0, sizeof data);
if (data_buf)
RtlInitUnicodeString (&data, data_buf);
/* First try it locally. Works for admin accounts. */
if ((lsa = lsa_open_policy (NULL, POLICY_CREATE_SECRET)))
{
NTSTATUS status = LsaStorePrivateData (lsa, &key,
data.Length ? &data : NULL);
/* Success or we're trying to remove a password entry which doesn't
exist. */
if (NT_SUCCESS (status)
|| (data.Length == 0 && status == STATUS_OBJECT_NAME_NOT_FOUND))
ret = 0;
else
__seterrno_from_nt_status (status);
lsa_close_policy (lsa);
}
else if (ret && !username)
{
client_request_setpwd request (&data);
if (request.make_request () == -1 || request.error_code ())
set_errno (request.error_code ());
else
ret = 0;
}
if (data_buf)
{
RtlSecureZeroMemory (data.Buffer, data.Length);
free (data_buf);
}
}
return ret;
}
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