* Makefile.in: Add object files sec_helper.cc' and sec_acl.cc'.
* security.cc: Swap out several functions.
* sec_acl.cc: New file. Move Sun compatibel ACL functions from
`security.cc' to here.
* sec_helper.cc: New file. Move security helper functions from
`security.cc' to here.
* security.h: Changed to accomodate the above changes.
* grp.cc: Replace `group_in_memory_p' by `group_state'.
Eliminate group_sem throughout.
(enum grp_state): New enumeration type.
(read_etc_group): Make race safe.
* security.cc: Eliminate group_sem throughout.
This commit is contained in:
Corinna Vinschen
399
winsup/cygwin/sec_helper.cc
Normal file
399
winsup/cygwin/sec_helper.cc
Normal file
@@ -0,0 +1,399 @@
|
||||
/* sec_helper.cc: NT security helper functions
|
||||
|
||||
Copyright 2000, 2001 Cygnus Solutions.
|
||||
|
||||
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. */
|
||||
|
||||
#include "winsup.h"
|
||||
#include <grp.h>
|
||||
#include <pwd.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
#include <limits.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/acl.h>
|
||||
#include <ctype.h>
|
||||
#include <wingdi.h>
|
||||
#include <winuser.h>
|
||||
#include "cygerrno.h"
|
||||
#include "perprocess.h"
|
||||
#include "fhandler.h"
|
||||
#include "path.h"
|
||||
#include "dtable.h"
|
||||
#include "sync.h"
|
||||
#include "sigproc.h"
|
||||
#include "pinfo.h"
|
||||
#include "cygheap.h"
|
||||
#include "security.h"
|
||||
|
||||
SID_IDENTIFIER_AUTHORITY sid_auth[] = {
|
||||
{SECURITY_NULL_SID_AUTHORITY},
|
||||
{SECURITY_WORLD_SID_AUTHORITY},
|
||||
{SECURITY_LOCAL_SID_AUTHORITY},
|
||||
{SECURITY_CREATOR_SID_AUTHORITY},
|
||||
{SECURITY_NON_UNIQUE_AUTHORITY},
|
||||
{SECURITY_NT_AUTHORITY}
|
||||
};
|
||||
|
||||
char *
|
||||
convert_sid_to_string_sid (PSID psid, char *sid_str)
|
||||
{
|
||||
char t[32];
|
||||
DWORD i;
|
||||
|
||||
if (!psid || !sid_str)
|
||||
return NULL;
|
||||
strcpy (sid_str, "S-1-");
|
||||
__small_sprintf(t, "%u", GetSidIdentifierAuthority (psid)->Value[5]);
|
||||
strcat (sid_str, t);
|
||||
for (i = 0; i < *GetSidSubAuthorityCount (psid); ++i)
|
||||
{
|
||||
__small_sprintf(t, "-%lu", *GetSidSubAuthority (psid, i));
|
||||
strcat (sid_str, t);
|
||||
}
|
||||
return sid_str;
|
||||
}
|
||||
|
||||
PSID
|
||||
get_sid (PSID psid, DWORD s, DWORD cnt, DWORD *r)
|
||||
{
|
||||
DWORD i;
|
||||
|
||||
if (!psid || s > 5 || cnt < 1 || cnt > 8)
|
||||
return NULL;
|
||||
|
||||
InitializeSid(psid, &sid_auth[s], cnt);
|
||||
for (i = 0; i < cnt; ++i)
|
||||
memcpy ((char *) psid + 8 + sizeof (DWORD) * i, &r[i], sizeof (DWORD));
|
||||
return psid;
|
||||
}
|
||||
|
||||
PSID
|
||||
convert_string_sid_to_sid (PSID psid, const char *sid_str)
|
||||
{
|
||||
char sid_buf[256];
|
||||
char *t, *lasts;
|
||||
DWORD cnt = 0;
|
||||
DWORD s = 0;
|
||||
DWORD i, r[8];
|
||||
|
||||
if (!sid_str || strncmp (sid_str, "S-1-", 4))
|
||||
return NULL;
|
||||
|
||||
strcpy (sid_buf, sid_str);
|
||||
|
||||
for (t = sid_buf + 4, i = 0;
|
||||
cnt < 8 && (t = strtok_r (t, "-", &lasts));
|
||||
t = NULL, ++i)
|
||||
if (i == 0)
|
||||
s = strtoul (t, NULL, 10);
|
||||
else
|
||||
r[cnt++] = strtoul (t, NULL, 10);
|
||||
|
||||
return get_sid (psid, s, cnt, r);
|
||||
}
|
||||
|
||||
BOOL
|
||||
get_pw_sid (PSID sid, struct passwd *pw)
|
||||
{
|
||||
char *sp = pw->pw_gecos ? strrchr (pw->pw_gecos, ',') : NULL;
|
||||
|
||||
if (!sp)
|
||||
return FALSE;
|
||||
return convert_string_sid_to_sid (sid, ++sp) != NULL;
|
||||
}
|
||||
|
||||
BOOL
|
||||
get_gr_sid (PSID sid, struct group *gr)
|
||||
{
|
||||
return convert_string_sid_to_sid (sid, gr->gr_passwd) != NULL;
|
||||
}
|
||||
|
||||
PSID
|
||||
get_admin_sid ()
|
||||
{
|
||||
static NO_COPY char admin_sid_buf[MAX_SID_LEN];
|
||||
static NO_COPY PSID admin_sid = NULL;
|
||||
|
||||
if (!admin_sid)
|
||||
{
|
||||
admin_sid = (PSID) admin_sid_buf;
|
||||
convert_string_sid_to_sid (admin_sid, "S-1-5-32-544");
|
||||
}
|
||||
return admin_sid;
|
||||
}
|
||||
|
||||
PSID
|
||||
get_system_sid ()
|
||||
{
|
||||
static NO_COPY char system_sid_buf[MAX_SID_LEN];
|
||||
static NO_COPY PSID system_sid = NULL;
|
||||
|
||||
if (!system_sid)
|
||||
{
|
||||
system_sid = (PSID) system_sid_buf;
|
||||
convert_string_sid_to_sid (system_sid, "S-1-5-18");
|
||||
}
|
||||
return system_sid;
|
||||
}
|
||||
|
||||
PSID
|
||||
get_creator_owner_sid ()
|
||||
{
|
||||
static NO_COPY char owner_sid_buf[MAX_SID_LEN];
|
||||
static NO_COPY PSID owner_sid = NULL;
|
||||
|
||||
if (!owner_sid)
|
||||
{
|
||||
owner_sid = (PSID) owner_sid_buf;
|
||||
convert_string_sid_to_sid (owner_sid, "S-1-3-0");
|
||||
}
|
||||
return owner_sid;
|
||||
}
|
||||
|
||||
PSID
|
||||
get_world_sid ()
|
||||
{
|
||||
static NO_COPY char world_sid_buf[MAX_SID_LEN];
|
||||
static NO_COPY PSID world_sid = NULL;
|
||||
|
||||
if (!world_sid)
|
||||
{
|
||||
world_sid = (PSID) world_sid_buf;
|
||||
convert_string_sid_to_sid (world_sid, "S-1-1-0");
|
||||
}
|
||||
return world_sid;
|
||||
}
|
||||
|
||||
int
|
||||
get_id_from_sid (PSID psid, BOOL search_grp, int *type)
|
||||
{
|
||||
if (!IsValidSid (psid))
|
||||
{
|
||||
__seterrno ();
|
||||
small_printf ("IsValidSid failed with %E");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* First try to get SID from passwd or group entry */
|
||||
if (allow_ntsec)
|
||||
{
|
||||
char sidbuf[MAX_SID_LEN];
|
||||
PSID sid = (PSID) sidbuf;
|
||||
int id = -1;
|
||||
|
||||
if (!search_grp)
|
||||
{
|
||||
struct passwd *pw;
|
||||
while ((pw = getpwent ()) != NULL)
|
||||
{
|
||||
if (get_pw_sid (sid, pw) && EqualSid (psid, sid))
|
||||
{
|
||||
id = pw->pw_uid;
|
||||
break;
|
||||
}
|
||||
}
|
||||
endpwent ();
|
||||
if (id >= 0)
|
||||
{
|
||||
if (type)
|
||||
*type = USER;
|
||||
return id;
|
||||
}
|
||||
}
|
||||
if (search_grp || type)
|
||||
{
|
||||
struct group *gr;
|
||||
while ((gr = getgrent ()) != NULL)
|
||||
{
|
||||
if (get_gr_sid (sid, gr) && EqualSid (psid, sid))
|
||||
{
|
||||
id = gr->gr_gid;
|
||||
break;
|
||||
}
|
||||
}
|
||||
endgrent ();
|
||||
if (id >= 0)
|
||||
{
|
||||
if (type)
|
||||
*type = GROUP;
|
||||
return id;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* We use the RID as default UID/GID */
|
||||
int id = *GetSidSubAuthority(psid, *GetSidSubAuthorityCount(psid) - 1);
|
||||
|
||||
/*
|
||||
* The RID maybe -1 if accountname == computername.
|
||||
* In this case we search for the accountname in the passwd and group files.
|
||||
* If type is needed, we search in each case.
|
||||
*/
|
||||
if (id == -1 || type)
|
||||
{
|
||||
char account[MAX_USER_NAME];
|
||||
char domain[MAX_COMPUTERNAME_LENGTH+1];
|
||||
DWORD acc_len = MAX_USER_NAME;
|
||||
DWORD dom_len = MAX_COMPUTERNAME_LENGTH+1;
|
||||
SID_NAME_USE acc_type;
|
||||
|
||||
if (!LookupAccountSid (NULL, psid, account, &acc_len,
|
||||
domain, &dom_len, &acc_type))
|
||||
{
|
||||
__seterrno ();
|
||||
return -1;
|
||||
}
|
||||
|
||||
switch (acc_type)
|
||||
{
|
||||
case SidTypeGroup:
|
||||
case SidTypeAlias:
|
||||
case SidTypeWellKnownGroup:
|
||||
if (type)
|
||||
*type = GROUP;
|
||||
if (id == -1)
|
||||
{
|
||||
struct group *gr = getgrnam (account);
|
||||
if (gr)
|
||||
id = gr->gr_gid;
|
||||
}
|
||||
break;
|
||||
case SidTypeUser:
|
||||
if (type)
|
||||
*type = USER;
|
||||
if (id == -1)
|
||||
{
|
||||
struct passwd *pw = getpwnam (account);
|
||||
if (pw)
|
||||
id = pw->pw_uid;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (id == -1)
|
||||
id = getuid ();
|
||||
return id;
|
||||
}
|
||||
|
||||
int
|
||||
get_id_from_sid (PSID psid, BOOL search_grp)
|
||||
{
|
||||
return get_id_from_sid (psid, search_grp, NULL);
|
||||
}
|
||||
|
||||
BOOL
|
||||
legal_sid_type (SID_NAME_USE type)
|
||||
{
|
||||
return type == SidTypeUser || type == SidTypeGroup
|
||||
|| SidTypeAlias || SidTypeWellKnownGroup;
|
||||
}
|
||||
|
||||
BOOL
|
||||
is_grp_member (uid_t uid, gid_t gid)
|
||||
{
|
||||
extern int getgroups (int, gid_t *, gid_t, const char *);
|
||||
BOOL grp_member = TRUE;
|
||||
|
||||
struct passwd *pw = getpwuid (uid);
|
||||
gid_t grps[NGROUPS_MAX];
|
||||
int cnt = getgroups (NGROUPS_MAX, grps,
|
||||
pw ? pw->pw_gid : myself->gid,
|
||||
pw ? pw->pw_name : cygheap->user.name ());
|
||||
int i;
|
||||
for (i = 0; i < cnt; ++i)
|
||||
if (grps[i] == gid)
|
||||
break;
|
||||
grp_member = (i < cnt);
|
||||
return grp_member;
|
||||
}
|
||||
|
||||
BOOL
|
||||
lookup_name (const char *name, const char *logsrv, PSID ret_sid)
|
||||
{
|
||||
char sidbuf[MAX_SID_LEN];
|
||||
PSID sid = (PSID) sidbuf;
|
||||
DWORD sidlen;
|
||||
char domuser[MAX_COMPUTERNAME_LENGTH+MAX_USER_NAME+1];
|
||||
char dom[MAX_COMPUTERNAME_LENGTH+1];
|
||||
DWORD domlen;
|
||||
SID_NAME_USE acc_type;
|
||||
|
||||
debug_printf ("name : %s", name ? name : "NULL");
|
||||
|
||||
if (!name)
|
||||
return FALSE;
|
||||
|
||||
if (cygheap->user.domain ())
|
||||
{
|
||||
strcat (strcat (strcpy (domuser, cygheap->user.domain ()), "\\"), name);
|
||||
if (LookupAccountName (NULL, domuser,
|
||||
sid, (sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom, (domlen = MAX_COMPUTERNAME_LENGTH, &domlen),
|
||||
&acc_type)
|
||||
&& legal_sid_type (acc_type))
|
||||
goto got_it;
|
||||
if (logsrv && *logsrv
|
||||
&& LookupAccountName (logsrv, domuser,
|
||||
sid, (sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom, (domlen = MAX_COMPUTERNAME_LENGTH,&domlen),
|
||||
&acc_type)
|
||||
&& legal_sid_type (acc_type))
|
||||
goto got_it;
|
||||
}
|
||||
if (logsrv && *logsrv)
|
||||
{
|
||||
if (LookupAccountName (logsrv, name,
|
||||
sid, (sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom, (domlen = MAX_COMPUTERNAME_LENGTH, &domlen),
|
||||
&acc_type)
|
||||
&& legal_sid_type (acc_type))
|
||||
goto got_it;
|
||||
if (acc_type == SidTypeDomain)
|
||||
{
|
||||
strcat (strcat (strcpy (domuser, dom), "\\"), name);
|
||||
if (LookupAccountName (logsrv, domuser,
|
||||
sid,(sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom,(domlen = MAX_COMPUTERNAME_LENGTH,&domlen),
|
||||
&acc_type))
|
||||
goto got_it;
|
||||
}
|
||||
}
|
||||
if (LookupAccountName (NULL, name,
|
||||
sid, (sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom, (domlen = 100, &domlen),
|
||||
&acc_type)
|
||||
&& legal_sid_type (acc_type))
|
||||
goto got_it;
|
||||
if (acc_type == SidTypeDomain)
|
||||
{
|
||||
strcat (strcat (strcpy (domuser, dom), "\\"), name);
|
||||
if (LookupAccountName (NULL, domuser,
|
||||
sid, (sidlen = MAX_SID_LEN, &sidlen),
|
||||
dom, (domlen = MAX_COMPUTERNAME_LENGTH, &domlen),
|
||||
&acc_type))
|
||||
goto got_it;
|
||||
}
|
||||
debug_printf ("LookupAccountName(%s) %E", name);
|
||||
__seterrno ();
|
||||
return FALSE;
|
||||
|
||||
got_it:
|
||||
debug_printf ("sid : [%d]", *GetSidSubAuthority((PSID) sid,
|
||||
*GetSidSubAuthorityCount((PSID) sid) - 1));
|
||||
|
||||
if (ret_sid)
|
||||
memcpy (ret_sid, sid, sidlen);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
Reference in New Issue
Block a user