This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "vfs_posix.h"
#include "librpc/gen_ndr/xattr.h"
#include "libcli/security/security.h"
+#include "param/param.h"
+#include "../lib/util/unix_privs.h"
+#include "lib/util/samba_modules.h"
+
+#if defined(UID_WRAPPER)
+#if !defined(UID_WRAPPER_REPLACE) && !defined(UID_WRAPPER_NOT_REPLACE)
+#define UID_WRAPPER_REPLACE
+#include "../uid_wrapper/uid_wrapper.h"
+#endif
+#else
+#define uwrap_enabled() 0
+#endif
+
+/* the list of currently registered ACL backends */
+static struct pvfs_acl_backend {
+ const struct pvfs_acl_ops *ops;
+} *backends = NULL;
+static int num_backends;
+
+/*
+ register a pvfs acl backend.
+
+ The 'name' can be later used by other backends to find the operations
+ structure for this backend.
+*/
+NTSTATUS pvfs_acl_register(const struct pvfs_acl_ops *ops)
+{
+ struct pvfs_acl_ops *new_ops;
+
+ if (pvfs_acl_backend_byname(ops->name) != NULL) {
+ DEBUG(0,("pvfs acl backend '%s' already registered\n", ops->name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ backends = talloc_realloc(talloc_autofree_context(), backends, struct pvfs_acl_backend, num_backends+1);
+ NT_STATUS_HAVE_NO_MEMORY(backends);
+
+ new_ops = (struct pvfs_acl_ops *)talloc_memdup(backends, ops, sizeof(*ops));
+ new_ops->name = talloc_strdup(new_ops, ops->name);
+
+ backends[num_backends].ops = new_ops;
+
+ num_backends++;
+
+ DEBUG(3,("NTVFS backend '%s' registered\n", ops->name));
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ return the operations structure for a named backend
+*/
+const struct pvfs_acl_ops *pvfs_acl_backend_byname(const char *name)
+{
+ int i;
+
+ for (i=0;i<num_backends;i++) {
+ if (strcmp(backends[i].ops->name, name) == 0) {
+ return backends[i].ops;
+ }
+ }
+
+ return NULL;
+}
+
+NTSTATUS pvfs_acl_init(void)
+{
+ static bool initialized = false;
+#define _MODULE_PROTO(init) extern NTSTATUS init(void);
+ STATIC_pvfs_acl_MODULES_PROTO;
+ init_module_fn static_init[] = { STATIC_pvfs_acl_MODULES };
+ init_module_fn *shared_init;
+
+ if (initialized) return NT_STATUS_OK;
+ initialized = true;
+
+ shared_init = load_samba_modules(NULL, "pvfs_acl");
+
+ run_init_functions(static_init);
+ run_init_functions(shared_init);
+
+ talloc_free(shared_init);
+
+ return NT_STATUS_OK;
+}
/*
{
unsigned i;
+ if (!acl) return;
+
for (i=0;i<acl->num_aces;i++) {
struct security_ace *ace = &acl->aces[i];
ace->access_mask = pvfs_translate_mask(ace->access_mask);
static NTSTATUS pvfs_default_acl(struct pvfs_state *pvfs,
struct ntvfs_request *req,
struct pvfs_filename *name, int fd,
- struct xattr_NTACL *acl)
+ struct security_descriptor **psd)
{
struct security_descriptor *sd;
NTSTATUS status;
struct security_ace ace;
mode_t mode;
+ struct id_map *ids;
+ struct composite_context *ctx;
- sd = security_descriptor_initialise(req);
- if (sd == NULL) {
+ *psd = security_descriptor_initialise(req);
+ if (*psd == NULL) {
return NT_STATUS_NO_MEMORY;
}
+ sd = *psd;
- status = sidmap_uid_to_sid(pvfs->sidmap, sd, name->st.st_uid, &sd->owner_sid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- status = sidmap_gid_to_sid(pvfs->sidmap, sd, name->st.st_gid, &sd->group_sid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ ids = talloc_zero_array(sd, struct id_map, 2);
+ NT_STATUS_HAVE_NO_MEMORY(ids);
+
+ ids[0].xid.id = name->st.st_uid;
+ ids[0].xid.type = ID_TYPE_UID;
+ ids[0].sid = NULL;
+
+ ids[1].xid.id = name->st.st_gid;
+ ids[1].xid.type = ID_TYPE_GID;
+ ids[1].sid = NULL;
+
+ ctx = wbc_xids_to_sids_send(pvfs->wbc_ctx, ids, 2, ids);
+ NT_STATUS_HAVE_NO_MEMORY(ctx);
+ status = wbc_xids_to_sids_recv(ctx, &ids);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ sd->owner_sid = talloc_steal(sd, ids[0].sid);
+ sd->group_sid = talloc_steal(sd, ids[1].sid);
+
+ talloc_free(ids);
sd->type |= SEC_DESC_DACL_PRESENT;
mode = name->st.st_mode;
ace.access_mask = SEC_RIGHTS_FILE_ALL;
security_descriptor_dacl_add(sd, &ace);
- acl->version = 1;
- acl->info.sd = sd;
-
return NT_STATUS_OK;
}
uint32_t access_mask,
union smb_setfileinfo *info)
{
- struct xattr_NTACL *acl;
uint32_t secinfo_flags = info->set_secdesc.in.secinfo_flags;
struct security_descriptor *new_sd, *sd, orig_sd;
- NTSTATUS status;
- uid_t uid = -1;
- gid_t gid = -1;
-
- acl = talloc(req, struct xattr_NTACL);
- if (acl == NULL) {
- return NT_STATUS_NO_MEMORY;
+ NTSTATUS status = NT_STATUS_NOT_FOUND;
+ uid_t old_uid = -1;
+ gid_t old_gid = -1;
+ uid_t new_uid = -1;
+ gid_t new_gid = -1;
+ struct id_map *ids;
+ struct composite_context *ctx;
+
+ if (pvfs->acl_ops != NULL) {
+ status = pvfs->acl_ops->acl_load(pvfs, name, fd, req, &sd);
}
-
- status = pvfs_acl_load(pvfs, name, fd, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
- status = pvfs_default_acl(pvfs, req, name, fd, acl);
+ status = pvfs_default_acl(pvfs, req, name, fd, &sd);
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- switch (acl->version) {
- case 1:
- sd = acl->info.sd;
- break;
- default:
- return NT_STATUS_INVALID_ACL;
- }
+ ids = talloc(req, struct id_map);
+ NT_STATUS_HAVE_NO_MEMORY(ids);
+ ZERO_STRUCT(ids->xid);
+ ids->sid = NULL;
+ ids->status = ID_UNKNOWN;
new_sd = info->set_secdesc.in.sd;
orig_sd = *sd;
- uid = name->st.st_uid;
- gid = name->st.st_gid;
+ old_uid = name->st.st_uid;
+ old_gid = name->st.st_gid;
/* only set the elements that have been specified */
- if ((secinfo_flags & SECINFO_OWNER) &&
- !dom_sid_equal(sd->owner_sid, new_sd->owner_sid)) {
+ if (secinfo_flags & SECINFO_OWNER) {
if (!(access_mask & SEC_STD_WRITE_OWNER)) {
return NT_STATUS_ACCESS_DENIED;
}
- sd->owner_sid = new_sd->owner_sid;
- status = sidmap_sid_to_unixuid(pvfs->sidmap, sd->owner_sid, &uid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ if (!dom_sid_equal(sd->owner_sid, new_sd->owner_sid)) {
+ ids->sid = new_sd->owner_sid;
+ ctx = wbc_sids_to_xids_send(pvfs->wbc_ctx, ids, 1, ids);
+ NT_STATUS_HAVE_NO_MEMORY(ctx);
+ status = wbc_sids_to_xids_recv(ctx, &ids);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ if (ids->xid.type == ID_TYPE_BOTH ||
+ ids->xid.type == ID_TYPE_UID) {
+ new_uid = ids->xid.id;
+ }
}
+ sd->owner_sid = new_sd->owner_sid;
}
- if ((secinfo_flags & SECINFO_GROUP) &&
- !dom_sid_equal(sd->group_sid, new_sd->group_sid)) {
- sd->group_sid = new_sd->group_sid;
- status = sidmap_sid_to_unixgid(pvfs->sidmap, sd->owner_sid, &gid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ if (secinfo_flags & SECINFO_GROUP) {
+ if (!(access_mask & SEC_STD_WRITE_OWNER)) {
+ return NT_STATUS_ACCESS_DENIED;
}
+ if (!dom_sid_equal(sd->group_sid, new_sd->group_sid)) {
+ ids->sid = new_sd->group_sid;
+ ctx = wbc_sids_to_xids_send(pvfs->wbc_ctx, ids, 1, ids);
+ NT_STATUS_HAVE_NO_MEMORY(ctx);
+ status = wbc_sids_to_xids_recv(ctx, &ids);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ if (ids->xid.type == ID_TYPE_BOTH ||
+ ids->xid.type == ID_TYPE_GID) {
+ new_gid = ids->xid.id;
+ }
+
+ }
+ sd->group_sid = new_sd->group_sid;
}
if (secinfo_flags & SECINFO_DACL) {
+ if (!(access_mask & SEC_STD_WRITE_DAC)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
sd->dacl = new_sd->dacl;
pvfs_translate_generic_bits(sd->dacl);
}
if (secinfo_flags & SECINFO_SACL) {
- sd->sacl = new_sd->sacl;
if (!(access_mask & SEC_FLAG_SYSTEM_SECURITY)) {
return NT_STATUS_ACCESS_DENIED;
}
+ sd->sacl = new_sd->sacl;
pvfs_translate_generic_bits(sd->sacl);
}
- if (uid != -1 || gid != -1) {
+ if (new_uid == old_uid) {
+ new_uid = -1;
+ }
+
+ if (new_gid == old_gid) {
+ new_gid = -1;
+ }
+
+ /* if there's something to change try it */
+ if (new_uid != -1 || new_gid != -1) {
int ret;
if (fd == -1) {
- ret = chown(name->full_name, uid, gid);
+ ret = chown(name->full_name, new_uid, new_gid);
} else {
- ret = fchown(fd, uid, gid);
+ ret = fchown(fd, new_uid, new_gid);
+ }
+ if (errno == EPERM) {
+ if (uwrap_enabled()) {
+ ret = 0;
+ } else {
+ /* try again as root if we have SEC_PRIV_RESTORE or
+ SEC_PRIV_TAKE_OWNERSHIP */
+ if (security_token_has_privilege(req->session_info->security_token,
+ SEC_PRIV_RESTORE) ||
+ security_token_has_privilege(req->session_info->security_token,
+ SEC_PRIV_TAKE_OWNERSHIP)) {
+ void *privs;
+ privs = root_privileges();
+ if (fd == -1) {
+ ret = chown(name->full_name, new_uid, new_gid);
+ } else {
+ ret = fchown(fd, new_uid, new_gid);
+ }
+ talloc_free(privs);
+ }
+ }
}
if (ret == -1) {
return pvfs_map_errno(pvfs, errno);
/* we avoid saving if the sd is the same. This means when clients
copy files and end up copying the default sd that we don't
needlessly use xattrs */
- if (!security_descriptor_equal(sd, &orig_sd)) {
- status = pvfs_acl_save(pvfs, name, fd, acl);
+ if (!security_descriptor_equal(sd, &orig_sd) && pvfs->acl_ops) {
+ status = pvfs->acl_ops->acl_save(pvfs, name, fd, sd);
}
return status;
struct pvfs_filename *name, int fd,
union smb_fileinfo *info)
{
- struct xattr_NTACL *acl;
- NTSTATUS status;
+ NTSTATUS status = NT_STATUS_NOT_FOUND;
struct security_descriptor *sd;
- acl = talloc(req, struct xattr_NTACL);
- if (acl == NULL) {
- return NT_STATUS_NO_MEMORY;
+ if (pvfs->acl_ops) {
+ status = pvfs->acl_ops->acl_load(pvfs, name, fd, req, &sd);
}
-
- status = pvfs_acl_load(pvfs, name, fd, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
- status = pvfs_default_acl(pvfs, req, name, fd, acl);
+ status = pvfs_default_acl(pvfs, req, name, fd, &sd);
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- switch (acl->version) {
- case 1:
- sd = acl->info.sd;
- break;
- default:
- return NT_STATUS_INVALID_ACL;
- }
-
normalise_sd_flags(sd, info->query_secdesc.in.secinfo_flags);
info->query_secdesc.out.sd = sd;
}
+/*
+ check the read only bit against any of the write access bits
+*/
+static bool pvfs_read_only(struct pvfs_state *pvfs, uint32_t access_mask)
+{
+ if ((pvfs->flags & PVFS_FLAG_READONLY) &&
+ (access_mask & (SEC_FILE_WRITE_DATA |
+ SEC_FILE_APPEND_DATA |
+ SEC_FILE_WRITE_EA |
+ SEC_FILE_WRITE_ATTRIBUTE |
+ SEC_STD_DELETE |
+ SEC_STD_WRITE_DAC |
+ SEC_STD_WRITE_OWNER |
+ SEC_DIR_DELETE_CHILD))) {
+ return true;
+ }
+ return false;
+}
+
+/*
+ see if we are a member of the appropriate unix group
+ */
+static bool pvfs_group_member(struct pvfs_state *pvfs, gid_t gid)
+{
+ int i, ngroups;
+ gid_t *groups;
+ if (getegid() == gid) {
+ return true;
+ }
+ ngroups = getgroups(0, NULL);
+ if (ngroups == 0) {
+ return false;
+ }
+ groups = talloc_array(pvfs, gid_t, ngroups);
+ if (groups == NULL) {
+ return false;
+ }
+ if (getgroups(ngroups, groups) != ngroups) {
+ talloc_free(groups);
+ return false;
+ }
+ for (i=0; i<ngroups; i++) {
+ if (groups[i] == gid) break;
+ }
+ talloc_free(groups);
+ return i < ngroups;
+}
+
/*
default access check function based on unix permissions
doing this saves on building a full security descriptor
for the common case of access check on files with no
specific NT ACL
+
+ If name is NULL then treat as a new file creation
*/
-NTSTATUS pvfs_access_check_unix(struct pvfs_state *pvfs,
- struct ntvfs_request *req,
- struct pvfs_filename *name,
- uint32_t *access_mask)
+static NTSTATUS pvfs_access_check_unix(struct pvfs_state *pvfs,
+ struct ntvfs_request *req,
+ struct pvfs_filename *name,
+ uint32_t *access_mask)
{
uid_t uid = geteuid();
uint32_t max_bits = SEC_RIGHTS_FILE_READ | SEC_FILE_ALL;
+ struct security_token *token = req->session_info->security_token;
- /* owner and root get extra permissions */
- if (uid == 0 || uid == name->st.st_uid) {
+ if (pvfs_read_only(pvfs, *access_mask)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (name == NULL || uid == name->st.st_uid) {
max_bits |= SEC_STD_ALL;
+ } else if (security_token_has_privilege(token, SEC_PRIV_RESTORE)) {
+ max_bits |= SEC_STD_DELETE;
}
- if (*access_mask == SEC_FLAG_MAXIMUM_ALLOWED) {
- *access_mask = max_bits;
- return NT_STATUS_OK;
+ if (name == NULL ||
+ (name->st.st_mode & S_IWOTH) ||
+ ((name->st.st_mode & S_IWGRP) &&
+ pvfs_group_member(pvfs, name->st.st_gid))) {
+ max_bits |= SEC_STD_ALL;
+ }
+
+ if (uwrap_enabled()) {
+ /* when running with the uid wrapper, files will be created
+ owned by the ruid, but we may have a different simulated
+ euid. We need to force the permission bits as though the
+ files owner matches the euid */
+ max_bits |= SEC_STD_ALL;
+ }
+
+ if (*access_mask & SEC_FLAG_MAXIMUM_ALLOWED) {
+ *access_mask |= max_bits;
+ *access_mask &= ~SEC_FLAG_MAXIMUM_ALLOWED;
+ }
+
+ if ((*access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
+ security_token_has_privilege(token, SEC_PRIV_SECURITY)) {
+ max_bits |= SEC_FLAG_SYSTEM_SECURITY;
+ }
+
+ if (((*access_mask & ~max_bits) & SEC_RIGHTS_PRIV_RESTORE) &&
+ security_token_has_privilege(token, SEC_PRIV_RESTORE)) {
+ max_bits |= ~(SEC_RIGHTS_PRIV_RESTORE);
+ }
+ if (((*access_mask & ~max_bits) & SEC_RIGHTS_PRIV_BACKUP) &&
+ security_token_has_privilege(token, SEC_PRIV_BACKUP)) {
+ max_bits |= ~(SEC_RIGHTS_PRIV_BACKUP);
}
if (*access_mask & ~max_bits) {
+ DEBUG(0,(__location__ " denied access to '%s' - wanted 0x%08x but got 0x%08x (missing 0x%08x)\n",
+ name?name->full_name:"(new file)", *access_mask, max_bits, *access_mask & ~max_bits));
return NT_STATUS_ACCESS_DENIED;
}
- *access_mask |= SEC_FILE_READ_ATTRIBUTE;
+ if (pvfs->ntvfs->ctx->protocol < PROTOCOL_SMB2_02) {
+ /* on SMB, this bit is always granted, even if not
+ asked for */
+ *access_mask |= SEC_FILE_READ_ATTRIBUTE;
+ }
return NT_STATUS_OK;
}
struct xattr_NTACL *acl;
NTSTATUS status;
struct security_descriptor *sd;
+ bool allow_delete = false;
+
+ /* on SMB2 a blank access mask is always denied */
+ if (pvfs->ntvfs->ctx->protocol >= PROTOCOL_SMB2_02 &&
+ *access_mask == 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (pvfs_read_only(pvfs, *access_mask)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (*access_mask & SEC_FLAG_MAXIMUM_ALLOWED ||
+ *access_mask & SEC_STD_DELETE) {
+ status = pvfs_access_check_parent(pvfs, req,
+ name, SEC_DIR_DELETE_CHILD);
+ if (NT_STATUS_IS_OK(status)) {
+ allow_delete = true;
+ *access_mask &= ~SEC_STD_DELETE;
+ }
+ }
acl = talloc(req, struct xattr_NTACL);
if (acl == NULL) {
/* expand the generic access bits to file specific bits */
*access_mask = pvfs_translate_mask(*access_mask);
- *access_mask &= ~SEC_FILE_READ_ATTRIBUTE;
+ if (pvfs->ntvfs->ctx->protocol < PROTOCOL_SMB2_02) {
+ *access_mask &= ~SEC_FILE_READ_ATTRIBUTE;
+ }
status = pvfs_acl_load(pvfs, name, -1, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
talloc_free(acl);
- return pvfs_access_check_unix(pvfs, req, name, access_mask);
+ status = pvfs_access_check_unix(pvfs, req, name, access_mask);
+ goto done;
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* check the acl against the required access mask */
- status = sec_access_check(sd, token, *access_mask, access_mask);
+ status = se_access_check(sd, token, *access_mask, access_mask);
+ talloc_free(acl);
+done:
+ if (pvfs->ntvfs->ctx->protocol < PROTOCOL_SMB2_02) {
+ /* on SMB, this bit is always granted, even if not
+ asked for */
+ *access_mask |= SEC_FILE_READ_ATTRIBUTE;
+ }
- /* this bit is always granted, even if not asked for */
- *access_mask |= SEC_FILE_READ_ATTRIBUTE;
+ if (allow_delete) {
+ *access_mask |= SEC_STD_DELETE;
+ }
- talloc_free(acl);
-
return status;
}
NTSTATUS pvfs_access_check_create(struct pvfs_state *pvfs,
struct ntvfs_request *req,
struct pvfs_filename *name,
- uint32_t *access_mask)
+ uint32_t *access_mask,
+ bool container,
+ struct security_descriptor **sd)
{
struct pvfs_filename *parent;
NTSTATUS status;
+ uint32_t parent_mask;
+ bool allow_delete = false;
+
+ if (pvfs_read_only(pvfs, *access_mask)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
status = pvfs_resolve_parent(pvfs, req, name, &parent);
- if (!NT_STATUS_IS_OK(status)) {
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ if (container) {
+ parent_mask = SEC_DIR_ADD_SUBDIR;
+ } else {
+ parent_mask = SEC_DIR_ADD_FILE;
+ }
+ if (*access_mask & SEC_FLAG_MAXIMUM_ALLOWED ||
+ *access_mask & SEC_STD_DELETE) {
+ parent_mask |= SEC_DIR_DELETE_CHILD;
+ }
+
+ status = pvfs_access_check(pvfs, req, parent, &parent_mask);
+ if (NT_STATUS_IS_OK(status)) {
+ if (parent_mask & SEC_DIR_DELETE_CHILD) {
+ allow_delete = true;
+ }
+ } else if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
+ /*
+ * on ACCESS_DENIED we get the rejected bits
+ * remove the non critical SEC_DIR_DELETE_CHILD
+ * and check if something else was rejected.
+ */
+ parent_mask &= ~SEC_DIR_DELETE_CHILD;
+ if (parent_mask != 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ status = NT_STATUS_OK;
+ } else {
return status;
}
- status = pvfs_access_check(pvfs, req, parent, access_mask);
+ if (*sd == NULL) {
+ status = pvfs_acl_inherited_sd(pvfs, req, req, parent, container, sd);
+ }
+
+ talloc_free(parent);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- if (! ((*access_mask) & SEC_DIR_ADD_FILE)) {
- return pvfs_access_check_simple(pvfs, req, parent, SEC_DIR_ADD_FILE);
+ /* expand the generic access bits to file specific bits */
+ *access_mask = pvfs_translate_mask(*access_mask);
+
+ if (*access_mask & SEC_FLAG_MAXIMUM_ALLOWED) {
+ *access_mask |= SEC_RIGHTS_FILE_ALL;
+ *access_mask &= ~SEC_FLAG_MAXIMUM_ALLOWED;
}
- return status;
+ if (pvfs->ntvfs->ctx->protocol < PROTOCOL_SMB2_02) {
+ /* on SMB, this bit is always granted, even if not
+ asked for */
+ *access_mask |= SEC_FILE_READ_ATTRIBUTE;
+ }
+
+ if (allow_delete) {
+ *access_mask |= SEC_STD_DELETE;
+ }
+
+ return NT_STATUS_OK;
}
/*
/*
determine if an ACE is inheritable
*/
-static BOOL pvfs_inheritable_ace(struct pvfs_state *pvfs,
+static bool pvfs_inheritable_ace(struct pvfs_state *pvfs,
const struct security_ace *ace,
- BOOL container)
+ bool container)
{
if (!container) {
return (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT) != 0;
}
if (ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) {
- return True;
+ return true;
}
if ((ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT) &&
!(ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT)) {
- return True;
+ return true;
}
- return False;
+ return false;
}
/*
static NTSTATUS pvfs_acl_inherit_aces(struct pvfs_state *pvfs,
struct security_descriptor *parent_sd,
struct security_descriptor *sd,
- BOOL container)
+ bool container)
{
int i;
/*
- setup an ACL on a new file/directory based on the inherited ACL from
- the parent. If there is no inherited ACL then we don't set anything,
- as the default ACL applies anyway
+ calculate the ACL on a new file/directory based on the inherited ACL
+ from the parent. If there is no inherited ACL then return a NULL
+ ACL, which means the default ACL should be used
*/
-NTSTATUS pvfs_acl_inherit(struct pvfs_state *pvfs,
- struct ntvfs_request *req,
- struct pvfs_filename *name,
- int fd)
+NTSTATUS pvfs_acl_inherited_sd(struct pvfs_state *pvfs,
+ TALLOC_CTX *mem_ctx,
+ struct ntvfs_request *req,
+ struct pvfs_filename *parent,
+ bool container,
+ struct security_descriptor **ret_sd)
{
struct xattr_NTACL *acl;
NTSTATUS status;
- struct pvfs_filename *parent;
struct security_descriptor *parent_sd, *sd;
- BOOL container;
+ struct id_map *ids;
+ struct composite_context *ctx;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
- /* form the parents path */
- status = pvfs_resolve_parent(pvfs, req, name, &parent);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ *ret_sd = NULL;
acl = talloc(req, struct xattr_NTACL);
- if (acl == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(acl, tmp_ctx);
status = pvfs_acl_load(pvfs, parent, -1, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
+ talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ NT_STATUS_NOT_OK_RETURN_AND_FREE(status, tmp_ctx);
switch (acl->version) {
case 1:
parent_sd = acl->info.sd;
break;
default:
+ talloc_free(tmp_ctx);
return NT_STATUS_INVALID_ACL;
}
parent_sd->dacl == NULL ||
parent_sd->dacl->num_aces == 0) {
/* go with the default ACL */
+ talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
/* create the new sd */
sd = security_descriptor_initialise(req);
- if (sd == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sd, tmp_ctx);
- status = sidmap_uid_to_sid(pvfs->sidmap, sd, name->st.st_uid, &sd->owner_sid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- status = sidmap_gid_to_sid(pvfs->sidmap, sd, name->st.st_gid, &sd->group_sid);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ ids = talloc_array(sd, struct id_map, 2);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(ids, tmp_ctx);
- sd->type |= SEC_DESC_DACL_PRESENT;
+ ids[0].xid.id = geteuid();
+ ids[0].xid.type = ID_TYPE_UID;
+ ids[0].sid = NULL;
+ ids[0].status = ID_UNKNOWN;
+
+ ids[1].xid.id = getegid();
+ ids[1].xid.type = ID_TYPE_GID;
+ ids[1].sid = NULL;
+ ids[1].status = ID_UNKNOWN;
- container = (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY) ? True:False;
+ ctx = wbc_xids_to_sids_send(pvfs->wbc_ctx, ids, 2, ids);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(ctx, tmp_ctx);
+
+ status = wbc_xids_to_sids_recv(ctx, &ids);
+ NT_STATUS_NOT_OK_RETURN_AND_FREE(status, tmp_ctx);
+
+ sd->owner_sid = talloc_steal(sd, ids[0].sid);
+ sd->group_sid = talloc_steal(sd, ids[1].sid);
+
+ sd->type |= SEC_DESC_DACL_PRESENT;
/* fill in the aces from the parent */
status = pvfs_acl_inherit_aces(pvfs, parent_sd, sd, container);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ NT_STATUS_NOT_OK_RETURN_AND_FREE(status, tmp_ctx);
/* if there is nothing to inherit then we fallback to the
default acl */
if (sd->dacl == NULL || sd->dacl->num_aces == 0) {
+ talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
- acl->info.sd = sd;
+ *ret_sd = talloc_steal(mem_ctx, sd);
+
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ setup an ACL on a new file/directory based on the inherited ACL from
+ the parent. If there is no inherited ACL then we don't set anything,
+ as the default ACL applies anyway
+*/
+NTSTATUS pvfs_acl_inherit(struct pvfs_state *pvfs,
+ struct ntvfs_request *req,
+ struct pvfs_filename *name,
+ int fd)
+{
+ struct xattr_NTACL acl;
+ NTSTATUS status;
+ struct security_descriptor *sd;
+ struct pvfs_filename *parent;
+ bool container;
+
+ /* form the parents path */
+ status = pvfs_resolve_parent(pvfs, req, name, &parent);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ container = (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY) ? true:false;
+
+ status = pvfs_acl_inherited_sd(pvfs, req, req, parent, container, &sd);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(parent);
+ return status;
+ }
+
+ if (sd == NULL) {
+ return NT_STATUS_OK;
+ }
+
+ acl.version = 1;
+ acl.info.sd = sd;
+
+ status = pvfs_acl_save(pvfs, name, fd, &acl);
+ talloc_free(sd);
+ talloc_free(parent);
- status = pvfs_acl_save(pvfs, name, fd, acl);
-
return status;
}
+
+/*
+ return the maximum allowed access mask
+*/
+NTSTATUS pvfs_access_maximal_allowed(struct pvfs_state *pvfs,
+ struct ntvfs_request *req,
+ struct pvfs_filename *name,
+ uint32_t *maximal_access)
+{
+ *maximal_access = SEC_FLAG_MAXIMUM_ALLOWED;
+ return pvfs_access_check(pvfs, req, name, maximal_access);
+}
git.samba.org / samba.git / blobdiff