601 lines
18 KiB
C
601 lines
18 KiB
C
/* cyglsa.c: LSA authentication module for Cygwin
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Copyright 2006, 2008, 2010, 2011, 2012 Red Hat, Inc.
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Written by Corinna Vinschen <corinna@vinschen.de>
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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 details. */
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#define WINVER 0x0600
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#include <ntstatus.h>
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#include <windows.h>
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#include <wininet.h>
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#include <lmcons.h>
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#include <iptypes.h>
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#include <ntsecapi.h>
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#include "../cygwin/cyglsa.h"
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#include "../cygwin/include/cygwin/version.h"
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static PLSA_SECPKG_FUNCS funcs;
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BOOL APIENTRY
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DllMain (HINSTANCE inst, DWORD reason, LPVOID res)
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{
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switch (reason)
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{
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case DLL_PROCESS_ATTACH:
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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case DLL_PROCESS_DETACH:
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break;
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}
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return TRUE;
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}
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/* Declare NTDLL functions here to avoid problems with different
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header file layout in different compiler environments. */
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#ifndef NT_SUCCESS
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#define NT_SUCCESS(s) ((s) >= 0)
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#endif
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/* These standard POSIX functions are implemented in NTDLL and exported.
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There's just no header to define them and using wchar.h from mingw
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or Cygwin seems wrong somehow. */
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wchar_t *__cdecl wcscpy (wchar_t *, const wchar_t *);
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size_t __cdecl wcslen (const wchar_t *);
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#ifndef RtlInitEmptyUnicodeString
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__inline VOID NTAPI
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RtlInitEmptyUnicodeString(PUNICODE_STRING dest, PCWSTR buf, USHORT len)
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{
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dest->Length = 0;
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dest->MaximumLength = len;
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dest->Buffer = (PWSTR) buf;
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}
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#endif
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static PUNICODE_STRING
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uni_alloc (PWCHAR src, USHORT len)
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{
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PUNICODE_STRING tgt;
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if (!(tgt = funcs->AllocateLsaHeap (sizeof (UNICODE_STRING))))
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return NULL;
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tgt->Length = len * sizeof (WCHAR);
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tgt->MaximumLength = tgt->Length + sizeof (WCHAR);
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if (!(tgt->Buffer = funcs->AllocateLsaHeap (tgt->MaximumLength)))
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{
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funcs->FreeLsaHeap (tgt);
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return NULL;
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}
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wcscpy (tgt->Buffer, src);
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return tgt;
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}
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/* No, I don't want to include stdio.h so I take what ntdll offers. */
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extern int _vsnprintf (char *, size_t, const char *, va_list);
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static HANDLE fh = INVALID_HANDLE_VALUE;
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static int
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cyglsa_printf (const char *format, ...)
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{
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char buf[256];
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DWORD wr;
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int ret;
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va_list ap;
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if (fh == INVALID_HANDLE_VALUE)
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return 0;
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va_start (ap, format);
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ret = _vsnprintf (buf, 256, format, ap);
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va_end (ap);
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if (ret <= 0)
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return ret;
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if (ret > 256)
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ret = 255;
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buf[255] = '\0';
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WriteFile (fh, buf, ret, &wr, NULL);
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return wr;
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}
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static void
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print_sid (const char *prefix, int idx, PISID sid)
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{
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DWORD i;
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cyglsa_printf ("%s", prefix);
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if (idx >= 0)
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cyglsa_printf ("[%d] ", idx);
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cyglsa_printf ("(0x%08x) ", (INT_PTR) sid);
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if (!sid)
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cyglsa_printf ("NULL\n");
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else if (IsBadReadPtr (sid, 8))
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cyglsa_printf ("INVALID POINTER\n");
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else if (!IsValidSid ((PSID) sid))
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cyglsa_printf ("INVALID SID\n");
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else if (IsBadReadPtr (sid, 8 + sizeof (DWORD) * sid->SubAuthorityCount))
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cyglsa_printf ("INVALID POINTER SPACE\n");
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else
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{
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cyglsa_printf ("S-%d-%d", sid->Revision, sid->IdentifierAuthority.Value[5]);
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for (i = 0; i < sid->SubAuthorityCount; ++i)
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cyglsa_printf ("-%lu", sid->SubAuthority[i]);
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cyglsa_printf ("\n");
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}
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}
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static void
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print_groups (PTOKEN_GROUPS grps)
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{
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DWORD i;
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cyglsa_printf ("Groups: (0x%08x) ", (INT_PTR) grps);
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if (!grps)
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cyglsa_printf ("NULL\n");
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else if (IsBadReadPtr (grps, sizeof (DWORD)))
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cyglsa_printf ("INVALID POINTER\n");
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else if (IsBadReadPtr (grps, sizeof (DWORD) + sizeof (SID_AND_ATTRIBUTES)
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* grps->GroupCount))
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cyglsa_printf ("INVALID POINTER SPACE\n");
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else
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{
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cyglsa_printf ("Count: %lu\n", grps->GroupCount);
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for (i = 0; i < grps->GroupCount; ++i)
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{
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cyglsa_printf ("(attr: 0x%lx)", grps->Groups[i].Attributes);
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print_sid (" ", i, (PISID) grps->Groups[i].Sid);
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}
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}
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}
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static void
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print_privs (PTOKEN_PRIVILEGES privs)
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{
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DWORD i;
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cyglsa_printf ("Privileges: (0x%08x) ", (INT_PTR) privs);
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if (!privs)
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cyglsa_printf ("NULL\n");
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else if (IsBadReadPtr (privs, sizeof (DWORD)))
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cyglsa_printf ("INVALID POINTER\n");
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else if (IsBadReadPtr (privs, sizeof (DWORD) + sizeof (LUID_AND_ATTRIBUTES)
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* privs->PrivilegeCount))
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cyglsa_printf ("INVALID POINTER SPACE\n");
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else
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{
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cyglsa_printf ("Count: %lu\n", privs->PrivilegeCount);
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for (i = 0; i < privs->PrivilegeCount; ++i)
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cyglsa_printf ("Luid: {%ld, %lu} Attributes: 0x%lx\n",
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privs->Privileges[i].Luid.HighPart,
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privs->Privileges[i].Luid.LowPart,
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privs->Privileges[i].Attributes);
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}
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}
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static void
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print_dacl (PACL dacl)
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{
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DWORD i;
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cyglsa_printf ("DefaultDacl: (0x%08x) ", (INT_PTR) dacl);
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if (!dacl)
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cyglsa_printf ("NULL\n");
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else if (IsBadReadPtr (dacl, sizeof (ACL)))
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cyglsa_printf ("INVALID POINTER\n");
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else if (IsBadReadPtr (dacl, dacl->AclSize))
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cyglsa_printf ("INVALID POINTER SPACE\n");
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else
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{
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cyglsa_printf ("Rev: %d, Count: %d\n", dacl->AclRevision, dacl->AceCount);
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for (i = 0; i < dacl->AceCount; ++i)
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{
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PVOID vace;
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PACCESS_ALLOWED_ACE ace;
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if (!GetAce (dacl, i, &vace))
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cyglsa_printf ("[%lu] GetAce error %lu\n", i, GetLastError ());
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else
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{
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ace = (PACCESS_ALLOWED_ACE) vace;
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cyglsa_printf ("Type: %x, Flags: %x, Access: %lx,",
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ace->Header.AceType, ace->Header.AceFlags, (DWORD) ace->Mask);
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print_sid (" ", i, (PISID) &ace->SidStart);
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}
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}
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}
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}
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static void
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print_tokinf (PLSA_TOKEN_INFORMATION_V2 ptok, size_t size,
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PVOID got_start, PVOID gotinf_start, PVOID gotinf_end)
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{
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if (fh == INVALID_HANDLE_VALUE)
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return;
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cyglsa_printf ("INCOMING: start: 0x%08x infstart: 0x%08x infend: 0x%08x\n",
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(INT_PTR) got_start, (INT_PTR) gotinf_start,
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(INT_PTR) gotinf_end);
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cyglsa_printf ("LSA_TOKEN_INFORMATION_V2: 0x%08x - 0x%08x\n",
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(INT_PTR) ptok, (INT_PTR) ptok + size);
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/* User SID */
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cyglsa_printf ("User: (attr: 0x%lx)", ptok->User.User.Attributes);
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print_sid (" ", -1, (PISID) ptok->User.User.Sid);
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/* Groups */
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print_groups (ptok->Groups);
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/* Primary Group SID */
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print_sid ("Primary Group: ", -1, (PISID)ptok->PrimaryGroup.PrimaryGroup);
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/* Privileges */
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print_privs (ptok->Privileges);
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/* Owner */
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print_sid ("Owner: ", -1, (PISID) ptok->Owner.Owner);
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/* Default DACL */
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print_dacl (ptok->DefaultDacl.DefaultDacl);
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// CloseHandle (fh);
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}
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NTSTATUS NTAPI
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LsaApInitializePackage (ULONG authp_id, PLSA_SECPKG_FUNCS dpt,
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PLSA_STRING dummy1, PLSA_STRING dummy2,
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PLSA_STRING *authp_name)
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{
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PLSA_STRING name = NULL;
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/* Set global pointer to lsa helper function table. */
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funcs = dpt;
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/* Allocate and set the name of the authentication package. This is the
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name which has to be used in LsaLookupAuthenticationPackage. */
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if (!(name = funcs->AllocateLsaHeap (sizeof *name)))
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return STATUS_NO_MEMORY;
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if (!(name->Buffer = funcs->AllocateLsaHeap (sizeof (CYG_LSA_PKGNAME))))
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{
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funcs->FreeLsaHeap (name);
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return STATUS_NO_MEMORY;
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}
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name->Length = sizeof (CYG_LSA_PKGNAME) - 1;
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name->MaximumLength = sizeof (CYG_LSA_PKGNAME);
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strcpy (name->Buffer, CYG_LSA_PKGNAME);
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(*authp_name) = name;
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#ifdef DEBUGGING
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fh = CreateFile ("C:\\cyglsa.dbgout", GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
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NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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cyglsa_printf ("Initialized\n");
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#endif /* DEBUGGING */
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return STATUS_SUCCESS;
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}
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NTSTATUS NTAPI
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LsaApLogonUserEx (PLSA_CLIENT_REQUEST request, SECURITY_LOGON_TYPE logon_type,
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PVOID auth, PVOID client_auth_base, ULONG auth_len,
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PVOID *pbuf, PULONG pbuf_len, PLUID logon_id,
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PNTSTATUS sub_stat, PLSA_TOKEN_INFORMATION_TYPE tok_type,
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PVOID *tok, PUNICODE_STRING *account,
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PUNICODE_STRING *authority, PUNICODE_STRING *machine)
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{
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DWORD checksum, i;
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PDWORD csp, csp_end;
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NTSTATUS stat;
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SECPKG_CLIENT_INFO clinf;
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PLSA_TOKEN_INFORMATION_V2 tokinf;
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cyglsa_t *authinf = (cyglsa_t *) auth;
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/* Check if the caller has the SeTcbPrivilege, otherwise refuse service. */
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stat = funcs->GetClientInfo (&clinf);
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if (stat != STATUS_SUCCESS)
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{
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cyglsa_printf ("GetClientInfo failed: 0x%08lx\n", stat);
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return stat;
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}
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if (!clinf.HasTcbPrivilege)
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{
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cyglsa_printf ("Client has no TCB privilege. Access denied.\n");
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return STATUS_ACCESS_DENIED;
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}
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/* Make a couple of validity checks. */
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if (auth_len < sizeof *authinf
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|| authinf->magic != CYG_LSA_MAGIC
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|| !authinf->username[0]
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|| !authinf->domain[0])
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{
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cyglsa_printf ("Invalid authentication parameter.\n");
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return STATUS_INVALID_PARAMETER;
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}
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checksum = CYG_LSA_MAGIC;
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csp = (PDWORD) &authinf->username;
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csp_end = (PDWORD) ((PBYTE) authinf + auth_len);
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while (csp < csp_end)
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checksum += *csp++;
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if (authinf->checksum != checksum)
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{
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cyglsa_printf ("Invalid checksum.\n");
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return STATUS_INVALID_PARAMETER_3;
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}
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/* Set account to username and authority to domain resp. machine name.
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The name of the logon account name as returned by LookupAccountSid
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is created from here as "authority\account". */
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authinf->username[UNLEN] = '\0';
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authinf->domain[MAX_DOMAIN_NAME_LEN] = '\0';
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if (account && !(*account = uni_alloc (authinf->username,
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wcslen (authinf->username))))
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{
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cyglsa_printf ("No memory trying to create account.\n");
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return STATUS_NO_MEMORY;
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}
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if (authority && !(*authority = uni_alloc (authinf->domain,
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wcslen (authinf->domain))))
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{
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cyglsa_printf ("No memory trying to create authority.\n");
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return STATUS_NO_MEMORY;
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}
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if (machine)
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{
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WCHAR mach[MAX_COMPUTERNAME_LENGTH + 1];
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DWORD msize = MAX_COMPUTERNAME_LENGTH + 1;
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if (!GetComputerNameW (mach, &msize))
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wcscpy (mach, L"UNKNOWN");
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if (!(*machine = uni_alloc (mach, wcslen (mach))))
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{
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cyglsa_printf ("No memory trying to create machine.\n");
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return STATUS_NO_MEMORY;
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}
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}
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/* Create a fake buffer in pbuf which is free'd again in the client.
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Windows 2000 tends to crash when setting this pointer to NULL. */
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if (pbuf)
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{
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#ifdef JUST_ANOTHER_NONWORKING_SOLUTION
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cygprf_t prf;
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WCHAR sam_username[MAX_DOMAIN_NAME_LEN + UNLEN + 2];
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SECURITY_STRING sam_user, prefix;
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PUCHAR user_auth;
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ULONG user_auth_size;
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WCHAR flatname[UNLEN + 1];
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UNICODE_STRING flatnm;
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TOKEN_SOURCE ts;
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HANDLE token;
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#endif /* JUST_ANOTHER_NONWORKING_SOLUTION */
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stat = funcs->AllocateClientBuffer (request, 64UL, pbuf);
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if (!LSA_SUCCESS (stat))
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{
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cyglsa_printf ("AllocateClientBuffer failed: 0x%08lx\n", stat);
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return stat;
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}
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#ifdef JUST_ANOTHER_NONWORKING_SOLUTION
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prf.magic_pre = MAGIC_PRE;
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prf.token = NULL;
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prf.magic_post = MAGIC_POST;
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#if 0
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/* That's how it was supposed to work according to MSDN... */
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wcscpy (sam_username, authinf->domain);
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wcscat (sam_username, L"\\");
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wcscat (sam_username, authinf->username);
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#else
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/* That's the only solution which worked, and then it only worked
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for machine local accounts. No domain authentication possible.
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STATUS_NO_SUCH_USER galore! */
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wcscpy (sam_username, authinf->username);
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#endif
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RtlInitUnicodeString (&sam_user, sam_username);
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RtlInitUnicodeString (&prefix, L"");
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RtlInitEmptyUnicodeString (&flatnm, flatname,
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(UNLEN + 1) * sizeof (WCHAR));
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stat = funcs->GetAuthDataForUser (&sam_user, SecNameSamCompatible,
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NULL, &user_auth,
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&user_auth_size, &flatnm);
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if (!NT_SUCCESS (stat))
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{
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char sam_u[MAX_DOMAIN_NAME_LEN + UNLEN + 2];
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wcstombs (sam_u, sam_user.Buffer, sizeof (sam_u));
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cyglsa_printf ("GetAuthDataForUser (%u,%u,%s) failed: 0x%08lx\n",
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sam_user.Length, sam_user.MaximumLength, sam_u, stat);
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return stat;
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}
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memcpy (ts.SourceName, "Cygwin.1", 8);
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ts.SourceIdentifier.HighPart = 0;
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ts.SourceIdentifier.LowPart = 0x0104;
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RtlInitEmptyUnicodeString (&flatnm, flatname,
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(UNLEN + 1) * sizeof (WCHAR));
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stat = funcs->ConvertAuthDataToToken (user_auth, user_auth_size,
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SecurityDelegation, &ts,
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Interactive, *authority,
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&token, logon_id, &flatnm,
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sub_stat);
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if (!NT_SUCCESS (stat))
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{
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cyglsa_printf ("ConvertAuthDataToToken failed: 0x%08lx\n", stat);
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return stat;
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}
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stat = funcs->DuplicateHandle (token, &prf.token);
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if (!NT_SUCCESS (stat))
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{
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cyglsa_printf ("DuplicateHandle failed: 0x%08lx\n", stat);
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return stat;
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}
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stat = funcs->CopyToClientBuffer (request, sizeof prf, *pbuf, &prf);
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if (!NT_SUCCESS (stat))
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{
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cyglsa_printf ("CopyToClientBuffer failed: 0x%08lx\n", stat);
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return stat;
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}
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funcs->FreeLsaHeap (user_auth);
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#endif /* JUST_ANOTHER_NONWORKING_SOLUTION */
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}
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if (pbuf_len)
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*pbuf_len = 64UL;
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/* A PLSA_TOKEN_INFORMATION_V2 is allocated in one piece, so... */
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#if defined (__x86_64__) || defined (_M_AMD64)
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{
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/* ...on 64 bit systems we have to convert the incoming 32 bit offsets
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into 64 bit pointers. That requires to re-evaluate the size of the
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outgoing tokinf structure and a somewhat awkward procedure to copy
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the information over. */
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LONG_PTR base;
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PBYTE tptr;
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DWORD size, newsize;
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PSID src_sid;
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PCYG_TOKEN_GROUPS src_grps;
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PTOKEN_GROUPS grps;
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PTOKEN_PRIVILEGES src_privs;
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PACL src_acl;
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base = (LONG_PTR) &authinf->inf;
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newsize = authinf->inf_size;
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newsize += sizeof (TOKEN_USER) - sizeof (CYG_TOKEN_USER); /* User SID */
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newsize += sizeof (PTOKEN_GROUPS) - sizeof (OFFSET); /* Groups */
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src_grps = (PCYG_TOKEN_GROUPS) (base + authinf->inf.Groups);
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newsize += src_grps->GroupCount /* Group SIDs */
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* (sizeof (SID_AND_ATTRIBUTES)
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- sizeof (CYG_SID_AND_ATTRIBUTES));
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newsize += sizeof (PSID) - sizeof (OFFSET); /* Primary Group SID */
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newsize += sizeof (PTOKEN_PRIVILEGES) - sizeof (OFFSET); /* Privileges */
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newsize += 0; /* Owner SID */
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newsize += sizeof (PACL) - sizeof (OFFSET); /* Default DACL */
|
|
|
|
if (!(tokinf = funcs->AllocateLsaHeap (newsize)))
|
|
return STATUS_NO_MEMORY;
|
|
tptr = (PBYTE)(tokinf + 1);
|
|
|
|
tokinf->ExpirationTime = authinf->inf.ExpirationTime;
|
|
/* User SID */
|
|
src_sid = (PSID) (base + authinf->inf.User.User.Sid);
|
|
size = GetLengthSid (src_sid);
|
|
CopySid (size, (PSID) tptr, src_sid);
|
|
tokinf->User.User.Sid = (PSID) tptr;
|
|
tptr += size;
|
|
tokinf->User.User.Attributes = authinf->inf.User.User.Attributes;
|
|
/* Groups */
|
|
grps = (PTOKEN_GROUPS) tptr;
|
|
tokinf->Groups = grps;
|
|
grps->GroupCount = src_grps->GroupCount;
|
|
tptr += sizeof grps->GroupCount
|
|
+ grps->GroupCount * sizeof (SID_AND_ATTRIBUTES);
|
|
/* Group SIDs */
|
|
for (i = 0; i < src_grps->GroupCount; ++i)
|
|
{
|
|
src_sid = (PSID) (base + src_grps->Groups[i].Sid);
|
|
size = GetLengthSid (src_sid);
|
|
CopySid (size, (PSID) tptr, src_sid);
|
|
tokinf->Groups->Groups[i].Sid = (PSID) tptr;
|
|
tptr += size;
|
|
tokinf->Groups->Groups[i].Attributes = src_grps->Groups[i].Attributes;
|
|
}
|
|
/* Primary Group SID */
|
|
src_sid = (PSID) (base + authinf->inf.PrimaryGroup.PrimaryGroup);
|
|
size = GetLengthSid (src_sid);
|
|
CopySid (size, (PSID) tptr, src_sid);
|
|
tokinf->PrimaryGroup.PrimaryGroup = (PSID) tptr;
|
|
tptr += size;
|
|
/* Privileges */
|
|
src_privs = (PTOKEN_PRIVILEGES) (base + authinf->inf.Privileges);
|
|
size = sizeof src_privs->PrivilegeCount
|
|
+ src_privs->PrivilegeCount * sizeof (LUID_AND_ATTRIBUTES);
|
|
memcpy (tptr, src_privs, size);
|
|
tokinf->Privileges = (PTOKEN_PRIVILEGES) tptr;
|
|
tptr += size;
|
|
/* Owner */
|
|
tokinf->Owner.Owner = NULL;
|
|
/* Default DACL */
|
|
src_acl = (PACL) (base + authinf->inf.DefaultDacl.DefaultDacl);
|
|
size = src_acl->AclSize;
|
|
memcpy (tptr, src_acl, size);
|
|
tokinf->DefaultDacl.DefaultDacl = (PACL) tptr;
|
|
}
|
|
#else
|
|
{
|
|
/* ...on 32 bit systems we just allocate tokinf with the same size as
|
|
we get, copy the whole structure and convert offsets into pointers. */
|
|
if (!(tokinf = funcs->AllocateLsaHeap (authinf->inf_size)))
|
|
return STATUS_NO_MEMORY;
|
|
memcpy (tokinf, &authinf->inf, authinf->inf_size);
|
|
|
|
/* User SID */
|
|
tokinf->User.User.Sid = (PSID)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->User.User.Sid);
|
|
/* Groups */
|
|
tokinf->Groups = (PTOKEN_GROUPS)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->Groups);
|
|
/* Group SIDs */
|
|
for (i = 0; i < tokinf->Groups->GroupCount; ++i)
|
|
tokinf->Groups->Groups[i].Sid = (PSID)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->Groups->Groups[i].Sid);
|
|
/* Primary Group SID */
|
|
tokinf->PrimaryGroup.PrimaryGroup = (PSID)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->PrimaryGroup.PrimaryGroup);
|
|
/* Privileges */
|
|
tokinf->Privileges = (PTOKEN_PRIVILEGES)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->Privileges);
|
|
/* Owner SID */
|
|
tokinf->Owner.Owner = NULL;
|
|
/* Default DACL */
|
|
tokinf->DefaultDacl.DefaultDacl = (PACL)
|
|
((PBYTE) tokinf + (LONG_PTR) tokinf->DefaultDacl.DefaultDacl);
|
|
}
|
|
#endif
|
|
|
|
*tok = (PVOID) tokinf;
|
|
*tok_type = LsaTokenInformationV2;
|
|
|
|
print_tokinf (tokinf, authinf->inf_size, authinf, &authinf->inf,
|
|
(PVOID)((LONG_PTR) &authinf->inf + authinf->inf_size));
|
|
|
|
/* Create logon session. */
|
|
if (!AllocateLocallyUniqueId (logon_id))
|
|
{
|
|
funcs->FreeLsaHeap (*tok);
|
|
*tok = NULL;
|
|
cyglsa_printf ("AllocateLocallyUniqueId failed: Win32 error %lu\n",
|
|
GetLastError ());
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
stat = funcs->CreateLogonSession (logon_id);
|
|
if (stat != STATUS_SUCCESS)
|
|
{
|
|
funcs->FreeLsaHeap (*tok);
|
|
*tok = NULL;
|
|
cyglsa_printf ("CreateLogonSession failed: 0x%08lx\n", stat);
|
|
return stat;
|
|
}
|
|
|
|
cyglsa_printf ("BINGO!!!\n", stat);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
VOID NTAPI
|
|
LsaApLogonTerminated(PLUID LogonId)
|
|
{
|
|
}
|
|
|
|
NTSTATUS NTAPI
|
|
LsaApCallPackage (PLSA_CLIENT_REQUEST request, PVOID authinf,
|
|
PVOID client_auth_base, ULONG auth_len, PVOID *ret_buf,
|
|
PULONG ret_buf_len, PNTSTATUS ret_stat)
|
|
{
|
|
return STATUS_NOT_IMPLEMENTED;
|
|
}
|