*/
#include "includes.h"
+#include "system/filesys.h"
+#include "../libcli/security/security.h"
+#include "../librpc/gen_ndr/ndr_security.h"
+#include "smbd/smbd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_ACLS
* Security descriptor / NT Token level access check function.
*/
bool can_access_file_acl(struct connection_struct *conn,
- const char * fname,
- uint32_t access_mask)
+ const struct smb_filename *smb_fname,
+ uint32_t access_mask)
{
NTSTATUS status;
uint32_t access_granted;
struct security_descriptor *secdesc = NULL;
+ bool ret;
- if (conn->server_info->utok.uid == 0 || conn->admin_user) {
+ if (get_current_uid(conn) == (uid_t)0) {
/* I'm sorry sir, I didn't know you were root... */
return true;
}
- status = SMB_VFS_GET_NT_ACL(conn, fname,
- (OWNER_SECURITY_INFORMATION |
- GROUP_SECURITY_INFORMATION |
- DACL_SECURITY_INFORMATION),
+ status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
+ (SECINFO_OWNER |
+ SECINFO_GROUP |
+ SECINFO_DACL),
&secdesc);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("Could not get acl: %s\n", nt_errstr(status)));
- return false;
+ ret = false;
+ goto out;
}
- status = se_access_check(secdesc, conn->server_info->ptok,
+ status = se_access_check(secdesc, get_current_nttok(conn),
access_mask, &access_granted);
+ ret = NT_STATUS_IS_OK(status);
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("can_access_file_acl for file %s "
+ "access_mask 0x%x, access_granted 0x%x "
+ "access %s\n",
+ smb_fname_str_dbg(smb_fname),
+ (unsigned int)access_mask,
+ (unsigned int)access_granted,
+ ret ? "ALLOWED" : "DENIED" ));
+ NDR_PRINT_DEBUG(security_descriptor, secdesc);
+ }
+ out:
TALLOC_FREE(secdesc);
- return NT_STATUS_IS_OK(status);
+ return ret;
}
/****************************************************************************
this to successfully return ACCESS_DENIED on a file open for delete access.
****************************************************************************/
-bool can_delete_file_in_directory(connection_struct *conn, const char *fname)
+bool can_delete_file_in_directory(connection_struct *conn,
+ struct smb_filename *smb_fname)
{
- SMB_STRUCT_STAT sbuf;
TALLOC_CTX *ctx = talloc_tos();
char *dname = NULL;
+ struct smb_filename *smb_fname_parent = NULL;
+ NTSTATUS status;
+ bool ret;
if (!CAN_WRITE(conn)) {
return False;
}
+ if (!lp_acl_check_permissions(SNUM(conn))) {
+ /* This option means don't check. */
+ return true;
+ }
+
/* Get the parent directory permission mask and owners. */
- if (!parent_dirname(ctx, fname, &dname, NULL)) {
+ if (!parent_dirname(ctx, smb_fname->base_name, &dname, NULL)) {
return False;
}
- if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
- return False;
+
+ status = create_synthetic_smb_fname(ctx, dname, NULL, NULL,
+ &smb_fname_parent);
+ if (!NT_STATUS_IS_OK(status)) {
+ ret = false;
+ goto out;
+ }
+
+ if(SMB_VFS_STAT(conn, smb_fname_parent) != 0) {
+ ret = false;
+ goto out;
}
/* fast paths first */
- if (!S_ISDIR(sbuf.st_ex_mode)) {
- return False;
+ if (!S_ISDIR(smb_fname_parent->st.st_ex_mode)) {
+ ret = false;
+ goto out;
}
- if (conn->server_info->utok.uid == 0 || conn->admin_user) {
+ if (get_current_uid(conn) == (uid_t)0) {
/* I'm sorry sir, I didn't know you were root... */
- return True;
+ ret = true;
+ goto out;
}
#ifdef S_ISVTX
/* sticky bit means delete only by owner of file or by root or
* by owner of directory. */
- if (sbuf.st_ex_mode & S_ISVTX) {
- SMB_STRUCT_STAT sbuf_file;
- if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
+ if (smb_fname_parent->st.st_ex_mode & S_ISVTX) {
+ if(SMB_VFS_STAT(conn, smb_fname) != 0) {
if (errno == ENOENT) {
/* If the file doesn't already exist then
* yes we'll be able to delete it. */
- return True;
+ ret = true;
+ goto out;
}
DEBUG(10,("can_delete_file_in_directory: can't "
- "stat file %s (%s)",
- fname, strerror(errno) ));
- return False;
+ "stat file %s (%s)",
+ smb_fname_str_dbg(smb_fname),
+ strerror(errno) ));
+ ret = false;
+ goto out;
}
+
/*
* Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
* for bug #3348. Don't assume owning sticky bit
* or the owner of the directory as we have no possible
* chance of deleting. Otherwise, go on and check the ACL.
*/
- if ((conn->server_info->utok.uid != sbuf.st_ex_uid) &&
- (conn->server_info->utok.uid != sbuf_file.st_ex_uid)) {
+ if ((get_current_uid(conn) !=
+ smb_fname_parent->st.st_ex_uid) &&
+ (get_current_uid(conn) != smb_fname->st.st_ex_uid)) {
DEBUG(10,("can_delete_file_in_directory: not "
- "owner of file %s or directory %s",
- fname, dname));
- return False;
+ "owner of file %s or directory %s",
+ smb_fname_str_dbg(smb_fname),
+ smb_fname_str_dbg(smb_fname_parent)));
+ ret = false;
+ goto out;
}
}
#endif
* check the file DELETE permission separately.
*/
- return can_access_file_acl(conn, dname, FILE_DELETE_CHILD);
+ ret = can_access_file_acl(conn, smb_fname_parent, FILE_DELETE_CHILD);
+ out:
+ TALLOC_FREE(dname);
+ TALLOC_FREE(smb_fname_parent);
+ return ret;
}
/****************************************************************************
Note this doesn't take into account share write permissions.
****************************************************************************/
-bool can_access_file_data(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
+bool can_access_file_data(connection_struct *conn,
+ const struct smb_filename *smb_fname,
+ uint32 access_mask)
{
if (!(access_mask & (FILE_READ_DATA|FILE_WRITE_DATA))) {
return False;
/* some fast paths first */
DEBUG(10,("can_access_file_data: requesting 0x%x on file %s\n",
- (unsigned int)access_mask, fname ));
+ (unsigned int)access_mask, smb_fname_str_dbg(smb_fname)));
- if (conn->server_info->utok.uid == 0 || conn->admin_user) {
+ if (get_current_uid(conn) == (uid_t)0) {
/* I'm sorry sir, I didn't know you were root... */
return True;
}
- if (!VALID_STAT(*psbuf)) {
- /* Get the file permission mask and owners. */
- if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
- return False;
- }
- }
+ SMB_ASSERT(VALID_STAT(smb_fname->st));
/* Check primary owner access. */
- if (conn->server_info->utok.uid == psbuf->st_ex_uid) {
+ if (get_current_uid(conn) == smb_fname->st.st_ex_uid) {
switch (access_mask) {
case FILE_READ_DATA:
- return (psbuf->st_ex_mode & S_IRUSR) ? True : False;
+ return (smb_fname->st.st_ex_mode & S_IRUSR) ?
+ True : False;
case FILE_WRITE_DATA:
- return (psbuf->st_ex_mode & S_IWUSR) ? True : False;
+ return (smb_fname->st.st_ex_mode & S_IWUSR) ?
+ True : False;
default: /* FILE_READ_DATA|FILE_WRITE_DATA */
- if ((psbuf->st_ex_mode & (S_IWUSR|S_IRUSR)) == (S_IWUSR|S_IRUSR)) {
+ if ((smb_fname->st.st_ex_mode &
+ (S_IWUSR|S_IRUSR)) ==
+ (S_IWUSR|S_IRUSR)) {
return True;
} else {
return False;
/* now for ACL checks */
- return can_access_file_acl(conn, fname, access_mask);
+ return can_access_file_acl(conn, smb_fname, access_mask);
}
/****************************************************************************
Note this doesn't take into account share write permissions.
****************************************************************************/
-bool can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
+bool can_write_to_file(connection_struct *conn,
+ const struct smb_filename *smb_fname)
{
- return can_access_file_data(conn, fname, psbuf, FILE_WRITE_DATA);
+ return can_access_file_data(conn, smb_fname, FILE_WRITE_DATA);
}
/****************************************************************************
struct security_descriptor *secdesc = NULL;
unsigned int i;
NTSTATUS status = SMB_VFS_GET_NT_ACL(conn, fname,
- DACL_SECURITY_INFORMATION, &secdesc);
+ SECINFO_DACL, &secdesc);
if (!NT_STATUS_IS_OK(status) || secdesc == NULL) {
return false;
git.samba.org / ira / wip.git / blobdiff