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authorCorinna Vinschen <corinna@vinschen.de>2003-02-05 16:15:22 +0000
committerCorinna Vinschen <corinna@vinschen.de>2003-02-05 16:15:22 +0000
commit62cd433e9813907639f8a30d8c5a3851424a57f6 (patch)
treec705b7808dd30b0cbb561145a4d0038d27a20318 /winsup/cygwin/sec_acl.cc
parent33c7867ef117710ac341c3d816d92e76d6cf7e9e (diff)
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* sec_acl.cc (setacl): Move all permission settings to beginning of
loop. Set default rights to same values as in alloc_sd(). Set DELETE for owner and default owner only if S_IWOTH is given. * sec_acl.cc: Change all __aclent16_t to __aclent32_t except in wrapper function definitions. Replace call to the aclXYZ functions by calls aclXYZ32. (searchace): Change type of third argument to __uid32_t and use ILLEGAL_UID instead of -1; (setacl): Remove some initializations. Only give STANDARD_RIGHTS_WRITE for S_IWOTH. Replace -1 by ILLEGAL_UID. (getacl): Change type of owner_sid, group_sid and ace_sid to cygpsid. In last else clause, suppress second call to ace_sid.get_id and use TRUE in first call. Replace EqualSid by ==. (acl_access): Call internal_getgroups in USER and GROUP cases. (acecmp: Define static. (acl32): Create from 16 bit type. (facl32): Ditto. (lacl32): Ditto. (aclcheck32): Ditto. (aclsort32): Ditto. (acltomode32): Ditto. (aclfrommode32): Ditto. (acltopbits32): Ditto. (aclfrompbits32): Ditto. (acltotext32): Ditto. (aclfromtext32): Ditto, and use strechr. (acl16to32): Create. (acl): Make it a wrapper function. (facl): Ditto. (lacl): Ditto. (aclcheck): Ditto. (aclsort): Ditto. (acltomode): Ditto. (aclfrommode): Ditto. (acltopbits): Ditto. (aclfrompbits): Ditto. (acltotext): Ditto. (aclfromtext): Ditto. * security.cc (write_sd): Call set_process_privilege and check ownership. (alloc_sd): Remove call to set_process_privilege and the owner check.
Diffstat (limited to 'winsup/cygwin/sec_acl.cc')
-rw-r--r--winsup/cygwin/sec_acl.cc256
1 files changed, 173 insertions, 83 deletions
diff --git a/winsup/cygwin/sec_acl.cc b/winsup/cygwin/sec_acl.cc
index a7fc462..febda4f 100644
--- a/winsup/cygwin/sec_acl.cc
+++ b/winsup/cygwin/sec_acl.cc
@@ -32,23 +32,23 @@ details. */
#include "cygheap.h"
#include "pwdgrp.h"
-extern "C" int aclsort (int nentries, int, __aclent16_t *aclbufp);
-extern "C" int acl (const char *path, int cmd, int nentries, __aclent16_t *aclbufp);
+extern "C" int aclsort32 (int nentries, int, __aclent32_t *aclbufp);
+extern "C" int acl32 (const char *path, int cmd, int nentries, __aclent32_t *aclbufp);
static int
-searchace (__aclent16_t *aclp, int nentries, int type, int id = -1)
+searchace (__aclent32_t *aclp, int nentries, int type, __uid32_t id = ILLEGAL_UID)
{
int i;
for (i = 0; i < nentries; ++i)
- if ((aclp[i].a_type == type && (id == -1 || aclp[i].a_id == id))
+ if ((aclp[i].a_type == type && (id == ILLEGAL_UID || aclp[i].a_id == id))
|| !aclp[i].a_type)
return i;
return -1;
}
static int
-setacl (const char *file, int nentries, __aclent16_t *aclbufp)
+setacl (const char *file, int nentries, __aclent32_t *aclbufp)
{
DWORD sd_size = 4096;
char sd_buf[4096];
@@ -63,7 +63,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
BOOL dummy;
/* Get owner SID. */
- PSID owner_sid = NULL;
+ PSID owner_sid;
if (!GetSecurityDescriptorOwner (psd, &owner_sid, &dummy))
{
__seterrno ();
@@ -72,7 +72,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
cygsid owner (owner_sid);
/* Get group SID. */
- PSID group_sid = NULL;
+ PSID group_sid;
if (!GetSecurityDescriptorGroup (psd, &group_sid, &dummy))
{
__seterrno ();
@@ -92,8 +92,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
__seterrno ();
return -1;
}
- if (group
- && !SetSecurityDescriptorGroup (&sd, group, FALSE))
+ if (!SetSecurityDescriptorGroup (&sd, group, FALSE))
{
__seterrno ();
return -1;
@@ -117,12 +116,22 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
}
for (int i = 0; i < nentries; ++i)
{
- DWORD allow = STANDARD_RIGHTS_READ
- | FILE_READ_ATTRIBUTES | FILE_READ_EA;
+ DWORD allow;
+ /* Owner has more standard rights set. */
+ if ((aclbufp[i].a_type & ~ACL_DEFAULT) == USER_OBJ)
+ allow = (STANDARD_RIGHTS_ALL & ~DELETE)
+ | FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA;
+ else
+ allow = STANDARD_RIGHTS_READ | FILE_READ_ATTRIBUTES | FILE_READ_EA;
if (aclbufp[i].a_perm & S_IROTH)
allow |= FILE_GENERIC_READ;
if (aclbufp[i].a_perm & S_IWOTH)
- allow |= STANDARD_RIGHTS_ALL | FILE_GENERIC_WRITE;
+ {
+ allow |= STANDARD_RIGHTS_WRITE | FILE_GENERIC_WRITE;
+ /* Owner gets DELETE right, too. */
+ if ((aclbufp[i].a_type & ~ACL_DEFAULT) == USER_OBJ)
+ allow |= DELETE;
+ }
if (aclbufp[i].a_perm & S_IXOTH)
allow |= FILE_GENERIC_EXECUTE;
if ((aclbufp[i].a_perm & (S_IWOTH | S_IXOTH)) == (S_IWOTH | S_IXOTH))
@@ -141,7 +150,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
&& (pos = searchace (aclbufp + i + 1, nentries - i - 1,
aclbufp[i].a_type | ACL_DEFAULT,
(aclbufp[i].a_type & (USER|GROUP))
- ? aclbufp[i].a_id : -1)) >= 0
+ ? aclbufp[i].a_id : ILLEGAL_UID)) >= 0
&& aclbufp[i].a_perm == aclbufp[pos].a_perm)
{
inheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
@@ -151,13 +160,11 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
switch (aclbufp[i].a_type)
{
case USER_OBJ:
- allow |= STANDARD_RIGHTS_ALL & ~DELETE;
if (!add_access_allowed_ace (acl, ace_off++, allow,
owner, acl_len, inheritance))
return -1;
break;
case DEF_USER_OBJ:
- allow |= STANDARD_RIGHTS_ALL & ~DELETE;
if (!add_access_allowed_ace (acl, ace_off++, allow,
well_known_creator_owner_sid, acl_len, inheritance))
return -1;
@@ -167,12 +174,12 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
if (!(pw = internal_getpwuid (aclbufp[i].a_id))
|| !sid.getfrompw (pw)
|| !add_access_allowed_ace (acl, ace_off++, allow,
- sid, acl_len, inheritance))
+ sid, acl_len, inheritance))
return -1;
break;
case GROUP_OBJ:
if (!add_access_allowed_ace (acl, ace_off++, allow,
- group, acl_len, inheritance))
+ group, acl_len, inheritance))
return -1;
break;
case DEF_GROUP_OBJ:
@@ -185,7 +192,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
if (!(gr = internal_getgrgid (aclbufp[i].a_id))
|| !sid.getfromgr (gr)
|| !add_access_allowed_ace (acl, ace_off++, allow,
- sid, acl_len, inheritance))
+ sid, acl_len, inheritance))
return -1;
break;
case OTHER_OBJ:
@@ -229,7 +236,7 @@ setacl (const char *file, int nentries, __aclent16_t *aclbufp)
#define DENY_X 010000
static void
-getace (__aclent16_t &acl, int type, int id, DWORD win_ace_mask,
+getace (__aclent32_t &acl, int type, int id, DWORD win_ace_mask,
DWORD win_ace_type)
{
acl.a_type = type;
@@ -255,7 +262,7 @@ getace (__aclent16_t &acl, int type, int id, DWORD win_ace_mask,
}
static int
-getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
+getacl (const char *file, DWORD attr, int nentries, __aclent32_t *aclbufp)
{
DWORD sd_size = 4096;
char sd_buf[4096];
@@ -268,30 +275,30 @@ getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
return ret;
}
- PSID owner_sid;
- PSID group_sid;
+ cygpsid owner_sid;
+ cygpsid group_sid;
BOOL dummy;
__uid32_t uid;
__gid32_t gid;
- if (!GetSecurityDescriptorOwner (psd, &owner_sid, &dummy))
+ if (!GetSecurityDescriptorOwner (psd, (PSID *) &owner_sid, &dummy))
{
debug_printf ("GetSecurityDescriptorOwner %E");
__seterrno ();
return -1;
}
- uid = cygsid (owner_sid).get_uid ();
+ uid = owner_sid.get_uid ();
- if (!GetSecurityDescriptorGroup (psd, &group_sid, &dummy))
+ if (!GetSecurityDescriptorGroup (psd, (PSID *) &group_sid, &dummy))
{
debug_printf ("GetSecurityDescriptorGroup %E");
__seterrno ();
return -1;
}
- gid = cygsid (group_sid).get_gid ();
+ gid = group_sid.get_gid ();
- __aclent16_t lacl[MAX_ACL_ENTRIES];
- memset (&lacl, 0, MAX_ACL_ENTRIES * sizeof (__aclent16_t));
+ __aclent32_t lacl[MAX_ACL_ENTRIES];
+ memset (&lacl, 0, MAX_ACL_ENTRIES * sizeof (__aclent32_t));
lacl[0].a_type = USER_OBJ;
lacl[0].a_id = uid;
lacl[1].a_type = GROUP_OBJ;
@@ -326,7 +333,7 @@ getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
if (!GetAce (acl, i, (PVOID *) &ace))
continue;
- cygsid ace_sid ((PSID) &ace->SidStart);
+ cygpsid ace_sid ((PSID) &ace->SidStart);
int id;
int type = 0;
@@ -356,19 +363,8 @@ getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
id = ILLEGAL_GID;
}
else
- {
- id = ace_sid.get_id (FALSE, &type);
- if (type != GROUP)
- {
- int type2 = 0;
- int id2 = ace_sid.get_id (TRUE, &type2);
- if (type2 == GROUP)
- {
- id = id2;
- type = GROUP;
- }
- }
- }
+ id = ace_sid.get_id (TRUE, &type);
+
if (!type)
continue;
if (!(ace->Header.AceFlags & INHERIT_ONLY || type & ACL_DEFAULT))
@@ -401,17 +397,17 @@ getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
if ((pos = searchace (lacl, MAX_ACL_ENTRIES, 0)) < 0)
pos = MAX_ACL_ENTRIES;
if (aclbufp) {
- if (EqualSid (owner_sid, group_sid))
+ if (owner_sid == group_sid)
lacl[0].a_perm = lacl[1].a_perm;
if (pos > nentries)
{
set_errno (ENOSPC);
return -1;
}
- memcpy (aclbufp, lacl, pos * sizeof (__aclent16_t));
+ memcpy (aclbufp, lacl, pos * sizeof (__aclent32_t));
for (i = 0; i < pos; ++i)
aclbufp[i].a_perm &= ~(DENY_R | DENY_W | DENY_X);
- aclsort (pos, 0, aclbufp);
+ aclsort32 (pos, 0, aclbufp);
}
syscall_printf ("%d = getacl (%s)", pos, file);
return pos;
@@ -420,13 +416,13 @@ getacl (const char *file, DWORD attr, int nentries, __aclent16_t *aclbufp)
int
acl_access (const char *path, int flags)
{
- __aclent16_t acls[MAX_ACL_ENTRIES];
+ __aclent32_t acls[MAX_ACL_ENTRIES];
int cnt;
- if ((cnt = acl (path, GETACL, MAX_ACL_ENTRIES, acls)) < 1)
+ if ((cnt = acl32 (path, GETACL, MAX_ACL_ENTRIES, acls)) < 1)
return -1;
- /* Only check existance. */
+ /* Only check existence. */
if (!(flags & (R_OK | W_OK | X_OK)))
return 0;
@@ -440,25 +436,31 @@ acl_access (const char *path, int flags)
{
/*
* Check if user is a NT group:
- * Take SID from passwd, search SID in group, check is_grp_member.
+ * Take SID from passwd, search SID in token groups
*/
cygsid owner;
struct passwd *pw;
- struct __group32 *gr = NULL;
if ((pw = internal_getpwuid (acls[i].a_id)) != NULL
&& owner.getfrompw (pw)
- && (gr = internal_getgrsid (owner))
- && is_grp_member (myself->uid, gr->gr_gid))
+ && internal_getgroups (0, NULL, &owner) > 0)
break;
continue;
}
break;
case GROUP_OBJ:
case GROUP:
- if (acls[i].a_id != myself->gid &&
- !is_grp_member (myself->uid, acls[i].a_id))
- continue;
+ if (acls[i].a_id != myself->gid)
+ {
+ cygsid group;
+ struct __group32 *gr = NULL;
+
+ if ((gr = internal_getgrgid (acls[i].a_id)) != NULL
+ && group.getfromgr (gr)
+ && internal_getgroups (0, NULL, &group) > 0)
+ break;
+ continue;
+ }
break;
case OTHER_OBJ:
break;
@@ -476,7 +478,7 @@ acl_access (const char *path, int flags)
static
int
-acl_worker (const char *path, int cmd, int nentries, __aclent16_t *aclbufp,
+acl_worker (const char *path, int cmd, int nentries, __aclent32_t *aclbufp,
int nofollow)
{
extern suffix_info stat_suffixes[];
@@ -530,7 +532,7 @@ acl_worker (const char *path, int cmd, int nentries, __aclent16_t *aclbufp,
switch (cmd)
{
case SETACL:
- if (!aclsort (nentries, 0, aclbufp))
+ if (!aclsort32 (nentries, 0, aclbufp))
return setacl (real_path.get_win32 (),
nentries, aclbufp);
break;
@@ -556,21 +558,21 @@ acl_worker (const char *path, int cmd, int nentries, __aclent16_t *aclbufp,
extern "C"
int
-acl (const char *path, int cmd, int nentries, __aclent16_t *aclbufp)
+acl32 (const char *path, int cmd, int nentries, __aclent32_t *aclbufp)
{
return acl_worker (path, cmd, nentries, aclbufp, 0);
}
extern "C"
int
-lacl (const char *path, int cmd, int nentries, __aclent16_t *aclbufp)
+lacl32 (const char *path, int cmd, int nentries, __aclent32_t *aclbufp)
{
return acl_worker (path, cmd, nentries, aclbufp, 1);
}
extern "C"
int
-facl (int fd, int cmd, int nentries, __aclent16_t *aclbufp)
+facl32 (int fd, int cmd, int nentries, __aclent32_t *aclbufp)
{
cygheap_fdget cfd (fd);
if (cfd < 0)
@@ -591,7 +593,7 @@ facl (int fd, int cmd, int nentries, __aclent16_t *aclbufp)
extern "C"
int
-aclcheck (__aclent16_t *aclbufp, int nentries, int *which)
+aclcheck32 (__aclent32_t *aclbufp, int nentries, int *which)
{
BOOL has_user_obj = FALSE;
BOOL has_group_obj = FALSE;
@@ -722,10 +724,10 @@ aclcheck (__aclent16_t *aclbufp, int nentries, int *which)
return 0;
}
-extern "C"
+static
int acecmp (const void *a1, const void *a2)
{
-#define ace(i) ((const __aclent16_t *) a##i)
+#define ace(i) ((const __aclent32_t *) a##i)
int ret = ace (1)->a_type - ace (2)->a_type;
if (!ret)
ret = ace (1)->a_id - ace (2)->a_id;
@@ -735,22 +737,22 @@ int acecmp (const void *a1, const void *a2)
extern "C"
int
-aclsort (int nentries, int, __aclent16_t *aclbufp)
+aclsort32 (int nentries, int, __aclent32_t *aclbufp)
{
- if (aclcheck (aclbufp, nentries, NULL))
+ if (aclcheck32 (aclbufp, nentries, NULL))
return -1;
if (!aclbufp || nentries < 1)
{
set_errno (EINVAL);
return -1;
}
- qsort ((void *) aclbufp, nentries, sizeof (__aclent16_t), acecmp);
+ qsort ((void *) aclbufp, nentries, sizeof (__aclent32_t), acecmp);
return 0;
}
extern "C"
int
-acltomode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
+acltomode32 (__aclent32_t *aclbufp, int nentries, mode_t *modep)
{
int pos;
@@ -790,7 +792,7 @@ acltomode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
extern "C"
int
-aclfrommode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
+aclfrommode32 (__aclent32_t *aclbufp, int nentries, mode_t *modep)
{
int pos;
@@ -828,16 +830,16 @@ aclfrommode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
extern "C"
int
-acltopbits (__aclent16_t *aclbufp, int nentries, mode_t *pbitsp)
+acltopbits32 (__aclent32_t *aclbufp, int nentries, mode_t *pbitsp)
{
- return acltomode (aclbufp, nentries, pbitsp);
+ return acltomode32 (aclbufp, nentries, pbitsp);
}
extern "C"
int
-aclfrompbits (__aclent16_t *aclbufp, int nentries, mode_t *pbitsp)
+aclfrompbits32 (__aclent32_t *aclbufp, int nentries, mode_t *pbitsp)
{
- return aclfrommode (aclbufp, nentries, pbitsp);
+ return aclfrommode32 (aclbufp, nentries, pbitsp);
}
static char *
@@ -854,10 +856,10 @@ permtostr (mode_t perm)
extern "C"
char *
-acltotext (__aclent16_t *aclbufp, int aclcnt)
+acltotext32 (__aclent32_t *aclbufp, int aclcnt)
{
if (!aclbufp || aclcnt < 1 || aclcnt > MAX_ACL_ENTRIES
- || aclcheck (aclbufp, aclcnt, NULL))
+ || aclcheck32 (aclbufp, aclcnt, NULL))
{
set_errno (EINVAL);
return NULL;
@@ -930,8 +932,8 @@ permfromstr (char *perm)
}
extern "C"
-__aclent16_t *
-aclfromtext (char *acltextp, int *)
+__aclent32_t *
+aclfromtext32 (char *acltextp, int *)
{
if (!acltextp)
{
@@ -939,7 +941,7 @@ aclfromtext (char *acltextp, int *)
return NULL;
}
char buf[strlen (acltextp) + 1];
- __aclent16_t lacl[MAX_ACL_ENTRIES];
+ __aclent32_t lacl[MAX_ACL_ENTRIES];
memset (lacl, 0, sizeof lacl);
int pos = 0;
strcpy (buf, acltextp);
@@ -970,11 +972,11 @@ aclfromtext (char *acltextp, int *)
return NULL;
}
lacl[pos].a_id = pw->pw_uid;
- c = strchr (c, ':');
+ c = strechr (c, ':');
}
else if (isdigit (*c))
lacl[pos].a_id = strtol (c, &c, 10);
- if (!c || *c != ':')
+ if (*c != ':')
{
set_errno (EINVAL);
return NULL;
@@ -998,11 +1000,11 @@ aclfromtext (char *acltextp, int *)
return NULL;
}
lacl[pos].a_id = gr->gr_gid;
- c = strchr (c, ':');
+ c = strechr (c, ':');
}
else if (isdigit (*c))
lacl[pos].a_id = strtol (c, &c, 10);
- if (!c || *c != ':')
+ if (*c != ':')
{
set_errno (EINVAL);
return NULL;
@@ -1036,9 +1038,97 @@ aclfromtext (char *acltextp, int *)
}
++pos;
}
- __aclent16_t *aclp = (__aclent16_t *) malloc (pos * sizeof (__aclent16_t));
+ __aclent32_t *aclp = (__aclent32_t *) malloc (pos * sizeof (__aclent32_t));
if (aclp)
- memcpy (aclp, lacl, pos * sizeof (__aclent16_t));
+ memcpy (aclp, lacl, pos * sizeof (__aclent32_t));
return aclp;
}
+/* __aclent16_t and __aclent32_t have same size and same member offsets */
+static __aclent32_t *
+acl16to32 (__aclent16_t *aclbufp, int nentries)
+{
+ __aclent32_t *aclbufp32 = (__aclent32_t *) aclbufp;
+ if (aclbufp32)
+ for (int i = 0; i < nentries; i++)
+ aclbufp32[i].a_id &= USHRT_MAX;
+ return aclbufp32;
+}
+
+extern "C"
+int
+acl (const char *path, int cmd, int nentries, __aclent16_t *aclbufp)
+{
+ return acl32 (path, cmd, nentries, acl16to32 (aclbufp, nentries));
+}
+
+extern "C"
+int
+facl (int fd, int cmd, int nentries, __aclent16_t *aclbufp)
+{
+ return facl32 (fd, cmd, nentries, acl16to32 (aclbufp, nentries));
+}
+
+extern "C"
+int
+lacl (const char *path, int cmd, int nentries, __aclent16_t *aclbufp)
+{
+ return lacl32 (path, cmd, nentries, acl16to32 (aclbufp, nentries));
+}
+
+extern "C"
+int
+aclcheck (__aclent16_t *aclbufp, int nentries, int *which)
+{
+ return aclcheck32 (acl16to32 (aclbufp, nentries), nentries, which);
+}
+
+extern "C"
+int
+aclsort (int nentries, int i, __aclent16_t *aclbufp)
+{
+ return aclsort32 (nentries, i, acl16to32 (aclbufp, nentries));
+}
+
+
+extern "C"
+int
+acltomode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
+{
+ return acltomode32 (acl16to32 (aclbufp, nentries), nentries, modep);
+}
+
+extern "C"
+int
+aclfrommode (__aclent16_t *aclbufp, int nentries, mode_t *modep)
+{
+ return aclfrommode32 ((__aclent32_t *)aclbufp, nentries, modep);
+}
+
+extern "C"
+int
+acltopbits (__aclent16_t *aclbufp, int nentries, mode_t *pbitsp)
+{
+ return acltopbits32 (acl16to32 (aclbufp, nentries), nentries, pbitsp);
+}
+
+extern "C"
+int
+aclfrompbits (__aclent16_t *aclbufp, int nentries, mode_t *pbitsp)
+{
+ return aclfrompbits32 ((__aclent32_t *)aclbufp, nentries, pbitsp);
+}
+
+extern "C"
+char *
+acltotext (__aclent16_t *aclbufp, int aclcnt)
+{
+ return acltotext32 (acl16to32 (aclbufp, aclcnt), aclcnt);
+}
+
+extern "C"
+__aclent16_t *
+aclfromtext (char *acltextp, int * aclcnt)
+{
+ return (__aclent16_t *) aclfromtext32 (acltextp, aclcnt);
+}