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