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newlib/winsup/lsaauth/cyglsa.c

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/* cyglsa.c: LSA authentication module for Cygwin
Copyright 2006 Red Hat, Inc.
Written by Corinna Vinschen <corinna@vinschen.de>
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. */
#define WINVER 0x0600
#define _CRT_SECURE_NO_DEPRECATE
#include <ntstatus.h>
#define WIN32_NO_STATUS
#include <windows.h>
#include <wininet.h>
#include <lm.h>
#include <ntsecapi.h>
#include "../cygwin/cyglsa.h"
#include "../cygwin/include/cygwin/version.h"
static PLSA_SECPKG_FUNCS funcs;
static BOOL must_create_logon_sid;
BOOL APIENTRY
DllMain (HINSTANCE inst, DWORD reason, LPVOID res)
{
switch (reason)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
static PUNICODE_STRING
uni_alloc (PWCHAR src, DWORD len)
{
PUNICODE_STRING tgt;
if (!(tgt = funcs->AllocateLsaHeap (sizeof (UNICODE_STRING))))
return NULL;
tgt->Length = len * sizeof (WCHAR);
tgt->MaximumLength = tgt->Length + sizeof (WCHAR);
if (!(tgt->Buffer = funcs->AllocateLsaHeap (tgt->MaximumLength)))
{
funcs->FreeLsaHeap (tgt);
return NULL;
}
wcscpy (tgt->Buffer, src);
return tgt;
}
#ifdef DEBUGGING
/* No, I don't want to include stdio.h... */
extern int sprintf (const char *, const char *, ...);
static void
print (HANDLE fh, const char *text, BOOL nl)
{
DWORD wr;
WriteFile (fh, text, strlen (text), &wr, NULL);
if (nl)
WriteFile (fh, "\n", 1, &wr, NULL);
}
static void
print_sid (HANDLE fh, const char *prefix, int idx, PISID sid)
{
char buf[256];
DWORD i;
print (fh, prefix, FALSE);
if (idx >= 0)
{
sprintf (buf, "[%d] ", idx);
print (fh, buf, FALSE);
}
sprintf (buf, "(0x%08x) ", (INT_PTR) sid);
print (fh, buf, FALSE);
if (!sid)
print (fh, "NULL", TRUE);
else if (IsBadReadPtr (sid, 8))
print (fh, "INVALID POINTER", TRUE);
else if (!IsValidSid ((PSID) sid))
print (fh, "INVALID SID", TRUE);
else if (IsBadReadPtr (sid, 8 + sizeof (DWORD) * sid->SubAuthorityCount))
print (fh, "INVALID POINTER SPACE", TRUE);
else
{
sprintf (buf, "S-%d-%d", sid->Revision, sid->IdentifierAuthority.Value[5]);
for (i = 0; i < sid->SubAuthorityCount; ++i)
sprintf (buf + strlen (buf), "-%lu", sid->SubAuthority[i]);
print (fh, buf, TRUE);
}
}
static void
print_groups (HANDLE fh, PTOKEN_GROUPS grps)
{
char buf[256];
DWORD i;
sprintf (buf, "Groups: (0x%08x) ", (INT_PTR) grps);
print (fh, buf, FALSE);
if (!grps)
print (fh, "NULL", TRUE);
else if (IsBadReadPtr (grps, sizeof (DWORD)))
print (fh, "INVALID POINTER", TRUE);
else if (IsBadReadPtr (grps, sizeof (DWORD) + sizeof (SID_AND_ATTRIBUTES)
* grps->GroupCount))
print (fh, "INVALID POINTER SPACE", TRUE);
else
{
sprintf (buf, "Count: %lu", grps->GroupCount);
print (fh, buf, TRUE);
for (i = 0; i < grps->GroupCount; ++i)
{
sprintf (buf, "(attr: 0x%lx)", grps->Groups[i].Attributes);
print_sid (fh, " ", i, (PISID) grps->Groups[i].Sid);
}
}
}
static void
print_privs (HANDLE fh, PTOKEN_PRIVILEGES privs)
{
char buf[256];
DWORD i;
sprintf (buf, "Privileges: (0x%08x) ", (INT_PTR) privs);
print (fh, buf, FALSE);
if (!privs)
print (fh, "NULL", TRUE);
else if (IsBadReadPtr (privs, sizeof (DWORD)))
print (fh, "INVALID POINTER", TRUE);
else if (IsBadReadPtr (privs, sizeof (DWORD) + sizeof (LUID_AND_ATTRIBUTES)
* privs->PrivilegeCount))
print (fh, "INVALID POINTER SPACE", TRUE);
else
{
sprintf (buf, "Count: %lu", privs->PrivilegeCount);
print (fh, buf, TRUE);
for (i = 0; i < privs->PrivilegeCount; ++i)
{
sprintf (buf, "Luid: {%ld, %lu} Attributes: 0x%lx",
privs->Privileges[i].Luid.HighPart,
privs->Privileges[i].Luid.LowPart,
privs->Privileges[i].Attributes);
print (fh, buf, TRUE);
}
}
}
static void
print_dacl (HANDLE fh, PACL dacl)
{
char buf[256];
DWORD i;
sprintf (buf, "DefaultDacl: (0x%08x) ", (INT_PTR) dacl);
print (fh, buf, FALSE);
if (!dacl)
print (fh, "NULL", TRUE);
else if (IsBadReadPtr (dacl, sizeof (ACL)))
print (fh, "INVALID POINTER", TRUE);
else if (IsBadReadPtr (dacl, dacl->AclSize))
print (fh, "INVALID POINTER SPACE", TRUE);
else
{
sprintf (buf, "Rev: %d, Count: %d", dacl->AclRevision, dacl->AceCount);
print (fh, buf, TRUE);
for (i = 0; i < dacl->AceCount; ++i)
{
PACCESS_ALLOWED_ACE ace;
if (!GetAce (dacl, i, (PVOID *) &ace))
{
sprintf (buf, "[%lu] GetAce error %lu", i, GetLastError ());
print (fh, buf, TRUE);
}
else
{
sprintf (buf, "Type: %x, Flags: %x, Access: %lx, ",
ace->Header.AceType, ace->Header.AceFlags, (DWORD) ace->Mask);
print_sid (fh, buf, i, (PISID) &ace->SidStart);
}
}
}
}
static void
print_tokinf (PLSA_TOKEN_INFORMATION_V2 ptok, size_t size,
PVOID got_start, PVOID gotinf_start, PVOID gotinf_end)
{
HANDLE fh;
char buf[256];
fh = CreateFile ("C:\\cyglsa.dbgout", GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (fh == INVALID_HANDLE_VALUE)
return;
sprintf (buf, "INCOMING: start: 0x%08x infstart: 0x%08x infend: 0x%08x",
(INT_PTR) got_start, (INT_PTR) gotinf_start,
(INT_PTR) gotinf_end);
print (fh, buf, TRUE);
sprintf (buf, "LSA_TOKEN_INFORMATION_V2: 0x%08x - 0x%08x",
(INT_PTR) ptok, (INT_PTR) ptok + size);
print (fh, buf, TRUE);
/* User SID */
sprintf (buf, "User: (attr: 0x%lx)", ptok->User.User.Attributes);
print_sid (fh, "User: ", -1, (PISID) ptok->User.User.Sid);
/* Groups */
print_groups (fh, ptok->Groups);
/* Primary Group SID */
print_sid (fh, "Primary Group: ", -1, (PISID)ptok->PrimaryGroup.PrimaryGroup);
/* Privileges */
print_privs (fh, ptok->Privileges);
/* Owner */
print_sid (fh, "Owner: ", -1, (PISID) ptok->Owner.Owner);
/* Default DACL */
print_dacl (fh, ptok->DefaultDacl.DefaultDacl);
CloseHandle (fh);
}
#endif /* DEBUGGING */
NTSTATUS NTAPI
LsaApInitializePackage (ULONG authp_id, PLSA_SECPKG_FUNCS dpt,
PLSA_STRING dummy1, PLSA_STRING dummy2,
PLSA_STRING *authp_name)
{
PLSA_STRING name = NULL;
DWORD vers, major, minor;
/* Set global pointer to lsa helper function table. */
funcs = dpt;
/* Allocate and set the name of the authentication package. This is the
name which has to be used in LsaLookupAuthenticationPackage. */
if (!(name = funcs->AllocateLsaHeap (sizeof *name)))
return STATUS_NO_MEMORY;
if (!(name->Buffer = funcs->AllocateLsaHeap (sizeof (CYG_LSA_PKGNAME))))
{
funcs->FreeLsaHeap (name);
return STATUS_NO_MEMORY;
}
name->Length = sizeof (CYG_LSA_PKGNAME) - 1;
name->MaximumLength = sizeof (CYG_LSA_PKGNAME);
strcpy (name->Buffer, CYG_LSA_PKGNAME);
(*authp_name) = name;
vers = GetVersion ();
major = LOBYTE (LOWORD (vers));
minor = HIBYTE (LOWORD (vers));
/* Check if we're running on Windows 2000 or lower. If so, we must create
the logon sid in the group list by ourselves. */
if (major < 5 || (major == 5 && minor == 0))
must_create_logon_sid = TRUE;
return STATUS_SUCCESS;
}
NTSTATUS NTAPI
LsaApLogonUser (PLSA_CLIENT_REQUEST request, SECURITY_LOGON_TYPE logon_type,
PVOID auth, PVOID client_auth_base, ULONG auth_len,
PVOID *pbuf, PULONG pbuf_len, PLUID logon_id,
PNTSTATUS sub_stat, PLSA_TOKEN_INFORMATION_TYPE tok_type,
PVOID *tok, PLSA_UNICODE_STRING *account,
PLSA_UNICODE_STRING *authority)
{
WCHAR user[UNLEN + 1];
WCHAR domain[INTERNET_MAX_HOST_NAME_LENGTH + 1];
DWORD checksum, ulen, dlen, i;
PDWORD csp, csp_end;
NTSTATUS stat;
SECPKG_CLIENT_INFO clinf;
PLSA_TOKEN_INFORMATION_V2 tokinf;
cyglsa_t *authinf = (cyglsa_t *) auth;
/* Check if the caller has the SeTcbPrivilege, otherwise refuse service. */
stat = funcs->GetClientInfo (&clinf);
if (stat != STATUS_SUCCESS)
return stat;
if (!clinf.HasTcbPrivilege)
return STATUS_ACCESS_DENIED;
/* Make a couple of validity checks. */
if (auth_len < sizeof *authinf
|| authinf->magic != CYG_LSA_MAGIC
|| !authinf->username[0]
|| !authinf->domain[0])
return STATUS_INVALID_PARAMETER;
checksum = CYGWIN_VERSION_MAGIC (CYGWIN_VERSION_DLL_MAJOR,
CYGWIN_VERSION_DLL_MINOR);
csp = (PDWORD) &authinf->username;
csp_end = (PDWORD) ((PBYTE) authinf + auth_len);
while (csp < csp_end)
checksum += *csp++;
if (authinf->checksum != checksum)
return STATUS_INVALID_PARAMETER_3;
/* Set account to username and authority to domain resp. machine name.
The name of the logon account name as returned by LookupAccountSid
is created from here as "authority\account". */
authinf->username[UNLEN] = '\0';
ulen = mbstowcs (user, authinf->username, UNLEN + 1);
authinf->domain[INTERNET_MAX_HOST_NAME_LENGTH] = '\0';
dlen = mbstowcs (domain, authinf->domain, INTERNET_MAX_HOST_NAME_LENGTH + 1);
if (account && !(*account = uni_alloc (user, ulen)))
return STATUS_NO_MEMORY;
if (authority && !(*authority = uni_alloc (domain, dlen)))
return STATUS_NO_MEMORY;
/* Create a fake buffer in pbuf which is free'd again in the client.
Windows 2000 tends to crash when setting this pointer to NULL. */
if (pbuf)
{
stat = funcs->AllocateClientBuffer (request, 64UL, pbuf);
if (!LSA_SUCCESS (stat))
return stat;
}
if (pbuf_len)
*pbuf_len = 64UL;
/* A PLSA_TOKEN_INFORMATION_V2 is allocated in one piece, so... */
#if defined (__x86_64__) || defined (_M_AMD64)
{
/* ...on 64 bit systems we have to convert the incoming 32 bit offsets
into 64 bit pointers. That requires to re-evaluate the size of the
outgoing tokinf structure and a somewhat awkward procedure to copy
the information over. */
LONG_PTR base;
PBYTE tptr;
DWORD size, newsize;
PSID src_sid;
PCYG_TOKEN_GROUPS src_grps;
PTOKEN_GROUPS grps;
PTOKEN_PRIVILEGES src_privs;
PACL src_acl;
base = (LONG_PTR) &authinf->inf;
newsize = authinf->inf_size;
newsize += sizeof (PSID) - sizeof (OFFSET); /* User SID */
newsize += sizeof (PTOKEN_GROUPS) - sizeof (OFFSET); /* Groups */
src_grps = (PCYG_TOKEN_GROUPS) (base + authinf->inf.Groups);
newsize += src_grps->GroupCount /* Group SIDs */
* (sizeof (PSID) - sizeof (OFFSET));
newsize += sizeof (PSID) - sizeof (OFFSET); /* Primary Group SID */
newsize += sizeof (PSID) - sizeof (OFFSET); /* Owner SID */
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. */
/* Allocate LUID for usage in the logon SID on Windows 2000. This is
not done in the 64 bit code above for hopefully obvious reasons... */
LUID logon_sid_id;
if (must_create_logon_sid && !AllocateLocallyUniqueId (&logon_sid_id))
return STATUS_INSUFFICIENT_RESOURCES;
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);
if (must_create_logon_sid
&& tokinf->Groups->Groups[i].Attributes & SE_GROUP_LOGON_ID
&& *GetSidSubAuthorityCount (tokinf->Groups->Groups[i].Sid) == 3
&& *GetSidSubAuthority (tokinf->Groups->Groups[i].Sid, 0)
== SECURITY_LOGON_IDS_RID)
{
*GetSidSubAuthority (tokinf->Groups->Groups[i].Sid, 1)
= logon_sid_id.HighPart;
*GetSidSubAuthority (tokinf->Groups->Groups[i].Sid, 2)
= logon_sid_id.LowPart;
}
}
/* 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;
#ifdef DEBUGGING
print_tokinf (tokinf, authinf->inf_size, authinf, &authinf->inf,
(PVOID)((LONG_PTR) &authinf->inf + authinf->inf_size));
#endif
/* Create logon session. */
if (!AllocateLocallyUniqueId (logon_id))
{
funcs->FreeLsaHeap (*tok);
*tok = NULL;
return STATUS_INSUFFICIENT_RESOURCES;
}
stat = funcs->CreateLogonSession (logon_id);
if (stat != STATUS_SUCCESS)
{
funcs->FreeLsaHeap (*tok);
*tok = NULL;
return 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;
}
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