diff options
Diffstat (limited to 'source3/smbd/dir.c')
| -rw-r--r-- | source3/smbd/dir.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/source3/smbd/dir.c b/source3/smbd/dir.c index 7dd425ef8a..01e3063b67 100644 --- a/source3/smbd/dir.c +++ b/source3/smbd/dir.c @@ -722,6 +722,62 @@ static BOOL user_can_read_file(connection_struct *conn, char *name) } /******************************************************************* +check to see if a user can write a file. This is only approximate, +it is used as part of the "hide unwriteable" option. Don't +use it for anything security sensitive +********************************************************************/ + +static BOOL user_can_write_file(connection_struct *conn, char *name) +{ + extern struct current_user current_user; + SMB_STRUCT_STAT ste; + SEC_DESC *psd = NULL; + size_t sd_size; + files_struct *fsp; + int smb_action; + int access_mode; + NTSTATUS status; + uint32 access_granted; + + ZERO_STRUCT(ste); + + /* + * If user is a member of the Admin group + * we never hide files from them. + */ + + if (conn->admin_user) + return True; + + /* If we can't stat it does not show it */ + if (vfs_stat(conn, name, &ste) != 0) + return False; + + /* Pseudo-open the file (note - no fd's created). */ + + if(S_ISDIR(ste.st_mode)) + fsp = open_directory(conn, name, &ste, 0, SET_DENY_MODE(DENY_NONE), (FILE_FAIL_IF_NOT_EXIST|FILE_EXISTS_OPEN), + unix_mode(conn, aDIR, name), &smb_action); + else + fsp = open_file_shared1(conn, name, &ste, FILE_WRITE_ATTRIBUTES, SET_DENY_MODE(DENY_NONE), + (FILE_FAIL_IF_NOT_EXIST|FILE_EXISTS_OPEN), 0, 0, &access_mode, &smb_action); + + if (!fsp) + return False; + + /* Get NT ACL -allocated in main loop talloc context. No free needed here. */ + sd_size = conn->vfs_ops.fget_nt_acl(fsp, fsp->fd, &psd); + close_file(fsp, False); + + /* No access if SD get failed. */ + if (!sd_size) + return False; + + return se_access_check(psd, current_user.nt_user_token, FILE_WRITE_DATA, + &access_granted, &status); +} + +/******************************************************************* Open a directory. ********************************************************************/ @@ -781,6 +837,19 @@ void *OpenDir(connection_struct *conn, char *name, BOOL use_veto) continue; } + /* Honour _hide unwriteable_ option */ + if (normal_entry && conn && lp_hideunwriteable(SNUM(conn))) { + char *entry; + int ret=0; + + if (asprintf(&entry, "%s/%s/%s", conn->origpath, name, n) > 0) { + ret = user_can_write_file(conn, entry); + SAFE_FREE(entry); + } + if (!ret) + continue; + } + if (used + l > dirp->mallocsize) { int s = MAX(used+l,used+2000); char *r; |