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authorJeremy Allison <jra@samba.org>2000-12-01 00:32:25 +0000
committerJeremy Allison <jra@samba.org>2000-12-01 00:32:25 +0000
commit36390f729360bec7ad3ef6413b2245b0c2e420ce (patch)
treee0ccf873557c36cba34b0ecd4441592f2c742d0e
parent8c0a28802a9660d55dbab08df29bc7ef655cca0a (diff)
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Code to read & return POSIX ACLs as NT ACLs. Close to test on Linux.
Jeremy. (This used to be commit 52e9311bc2a837d1f4791f36c3477c430f841378)
-rw-r--r--source3/smbd/posix_acls.c169
1 files changed, 95 insertions, 74 deletions
diff --git a/source3/smbd/posix_acls.c b/source3/smbd/posix_acls.c
index 427fc50472..705078e587 100644
--- a/source3/smbd/posix_acls.c
+++ b/source3/smbd/posix_acls.c
@@ -306,6 +306,21 @@ static BOOL unpack_nt_permissions(SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *p
}
/****************************************************************************
+ Map generic UNIX permissions to POSIX ACL perms.
+****************************************************************************/
+
+static acl_perm_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
+{
+ acl_perm_t ret = 0;
+
+ ret |= (mode & r_mask) ? ACL_READ : 0;
+ ret |= (mode & w_mask) ? ACL_WRITE : 0;
+ ret |= (mode & x_mask) ? ACL_EXECUTE : 0;
+
+ return ret;
+}
+
+/****************************************************************************
Count a linked list of canonical ACE entries.
****************************************************************************/
@@ -333,6 +348,76 @@ static void free_canon_ace_list( canon_ace *list_head )
}
}
+/******************************************************************************
+ Fall back to the generic 3 element UNIX permissions.
+********************************************************************************/
+
+static canon_ace *unix_canonicalise_acl(files_struct *fsp, SMB_STRUCT_STAT *psbuf,
+ DOM_SID *powner, DOM_SID *pgroup)
+{
+ extern DOM_SID global_sid_World;
+ canon_ace *list_head = NULL;
+ canon_ace *owner_ace = NULL;
+ canon_ace *group_ace = NULL;
+ canon_ace *other_ace = NULL;
+
+ /*
+ * Create 3 linked list entries.
+ */
+
+ if ((owner_ace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL)
+ goto fail;
+
+ if ((gtoup_ace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL)
+ goto fail;
+
+ if ((other_ace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL)
+ goto fail;
+
+ ZERO_STRUCTP(owner_ace);
+ ZERO_STRUCTP(group_ace);
+ ZERO_STRUCTP(other_ace);
+
+ acl_tag_t type;
+ acl_perm_t perms;
+ DOM_SID sid;
+
+ owner_ace->type = ACL_USER_OBJ;
+ owner_ace->sid = *powner;
+
+ group_ace->type = ACL_GROUP_OBJ;
+ group_ace->sid = *pgroup;
+
+ other_ace->type = ACL_OTHER_OBJ;
+ other_ace->sid = global_sid_World;
+
+ if (!fsp->is_directory) {
+ owner_ace->perms = unix_perms_to_acl_perms(sbuf.st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
+ group_ace->perms = unix_perms_to_acl_perms(sbuf.st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
+ other_ace->perms = unix_perms_to_acl_perms(sbuf.st_mode, S_IROTH, S_IWOTH, S_IXOTH);
+ } else {
+ mode_t mode = unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name);
+
+ owner_ace->perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
+ group_ace->perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
+ other_ace->perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
+ }
+
+ DLIST_ADD(list_head, other_ace);
+ DLIST_ADD(list_head, group_ace);
+ DLIST_ADD(list_head, owner_ace);
+
+ return list_head;
+
+ fail:
+
+ safe_free(owner_ace);
+ safe_free(group_ace);
+ safe_free(other_ace);
+
+ return NULL;
+}
+
/****************************************************************************
Create a linked list of canonical ACE entries. This is sorted so that DENY
entries are at the front of the list, as NT requires.
@@ -348,9 +433,6 @@ static canon_ace *canonicalise_acl( acl_t posix_acl, SMB_STRUCT_STAT *psbuf)
int entry_id = ACL_FIRST_ENTRY;
acl_entry_t entry;
- if (posix_acl == NULL)
- return default_canonicalise_acl(psbuf);
-
while ( acl_get_entry(posix_acl, entry_id, &entry) == 1) {
acl_tag_t tagtype;
acl_permset_t permset;
@@ -525,11 +607,19 @@ size_t get_nt_acl(files_struct *fsp, SEC_DESC **ppdesc)
create_file_sids(&sbuf, &owner_sid, &group_sid);
/* Create the canon_ace lists. */
- file_ace = canonicalise_acl( posix_acl, &sbuf);
+ if (posix_acl)
+ file_ace = canonicalise_acl( posix_acl, &sbuf);
+ else
+ file_ace = unix_canonicalise_acl(fsp, &sbuf, &owner_sid, &group_sid);
+
num_acls = count_canon_ace_list(file_ace);
if (fsp->is_directory) {
- dir_ace = canonicalise_acl( dir_acl, &sbuf);
+ if (dir_ace)
+ dir_ace = canonicalise_acl( dir_acl, &sbuf);
+ else
+ dir_ace = unix_canonicalise_acl(fsp, &sbuf, &owner_sid, &group_sid);
+
num_dir_acls = count_canon_ace_list(dir_ace);
}
@@ -597,75 +687,6 @@ size_t get_nt_acl(files_struct *fsp, SEC_DESC **ppdesc)
return sd_size;
}
- } else {
-
- /*
- * Fall back to the generic 3 element UNIX permissions.
- */
-
- owner_access = map_unix_perms(&owner_acl_type, sbuf.st_mode,
- S_IRUSR, S_IWUSR, S_IXUSR, fsp->is_directory);
- group_access = map_unix_perms(&grp_acl_type, sbuf.st_mode,
- S_IRGRP, S_IWGRP, S_IXGRP, fsp->is_directory);
- other_access = map_unix_perms(&other_acl_type, sbuf.st_mode,
- S_IROTH, S_IWOTH, S_IXOTH, fsp->is_directory);
-
- if(owner_access.mask)
- init_sec_ace(&ace_list[num_acls++], &owner_sid, owner_acl_type, owner_access, 0);
-
- if(group_access.mask)
- init_sec_ace(&ace_list[num_acls++], &group_sid, grp_acl_type, group_access, 0);
-
- if(other_access.mask)
- init_sec_ace(&ace_list[num_acls++], &global_sid_World, other_acl_type, other_access, 0);
-
- if(fsp->is_directory) {
- /*
- * For directory ACLs we also add in the inherited permissions
- * ACE entries. These are the permissions a file would get when
- * being created in the directory.
- */
- mode_t mode = unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name);
-
- owner_access = map_unix_perms(&owner_acl_type, mode,
- S_IRUSR, S_IWUSR, S_IXUSR, fsp->is_directory);
- group_access = map_unix_perms(&grp_acl_type, mode,
- S_IRGRP, S_IWGRP, S_IXGRP, fsp->is_directory);
- other_access = map_unix_perms(&other_acl_type, mode,
- S_IROTH, S_IWOTH, S_IXOTH, fsp->is_directory);
-
- if(owner_access.mask)
- init_sec_ace(&ace_list[num_acls++], &owner_sid, owner_acl_type,
- owner_access, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY);
-
- if(group_access.mask)
- init_sec_ace(&ace_list[num_acls++], &group_sid, grp_acl_type,
- group_access, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY);
-
- if(other_access.mask)
- init_sec_ace(&ace_list[num_acls++], &global_sid_World, other_acl_type,
- other_access, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY);
- }
-
- if(num_acls) {
- if((psa = make_sec_acl( ACL_REVISION, num_acls, ace_list)) == NULL) {
- DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
- return 0;
- }
- }
-
- *ppdesc = make_standard_sec_desc( &owner_sid, &group_sid, psa, &sd_size);
-
- if(!*ppdesc) {
- DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
- sd_size = 0;
- }
-
- free_sec_acl(&psa);
-
- return sd_size;
-}
-
/****************************************************************************
Reply to set a security descriptor on an fsp. security_info_sent is the
description of the following NT ACL.