diff options
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/proto.h | 4 | ||||
| -rw-r--r-- | source3/smbd/uid.c | 56 |
2 files changed, 60 insertions, 0 deletions
diff --git a/source3/smbd/proto.h b/source3/smbd/proto.h index 2198ccd3f7..e8ee8733a4 100644 --- a/source3/smbd/proto.h +++ b/source3/smbd/proto.h @@ -1099,6 +1099,10 @@ void reply_transs2(struct smb_request *req); /* The following definitions come from smbd/uid.c */ bool change_to_guest(void); +NTSTATUS check_user_share_access(connection_struct *conn, + const struct auth_session_info *session_info, + uint32_t *p_share_access, + bool *p_readonly_share); bool change_to_user(connection_struct *conn, uint64_t vuid); bool change_to_root_user(void); bool smbd_change_to_root_user(void); diff --git a/source3/smbd/uid.c b/source3/smbd/uid.c index 397380c525..f551e50eda 100644 --- a/source3/smbd/uid.c +++ b/source3/smbd/uid.c @@ -79,6 +79,62 @@ static void free_conn_session_info_if_unused(connection_struct *conn) } /******************************************************************* + Calculate access mask and if this user can access this share. +********************************************************************/ + +NTSTATUS check_user_share_access(connection_struct *conn, + const struct auth_session_info *session_info, + uint32_t *p_share_access, + bool *p_readonly_share) +{ + int snum = SNUM(conn); + uint32_t share_access = 0; + bool readonly_share = false; + + if (!user_ok_token(session_info->unix_info->unix_name, + session_info->info->domain_name, + session_info->security_token, snum)) { + return NT_STATUS_ACCESS_DENIED; + } + + readonly_share = is_share_read_only_for_token( + session_info->unix_info->unix_name, + session_info->info->domain_name, + session_info->security_token, + conn); + + share_access = create_share_access_mask(snum, + readonly_share, + session_info->security_token); + + if ((share_access & FILE_WRITE_DATA) == 0) { + if ((share_access & FILE_READ_DATA) == 0) { + /* No access, read or write. */ + DEBUG(0,("user %s connection to %s " + "denied due to share security " + "descriptor.\n", + session_info->unix_info->unix_name, + lp_servicename(talloc_tos(), snum))); + return NT_STATUS_ACCESS_DENIED; + } + } + + if (!readonly_share && + !(share_access & FILE_WRITE_DATA)) { + /* smb.conf allows r/w, but the security descriptor denies + * write. Fall back to looking at readonly. */ + readonly_share = True; + DEBUG(5,("falling back to read-only access-evaluation due to " + "security descriptor\n")); + } + + *p_share_access = share_access; + *p_readonly_share = readonly_share; + + return NT_STATUS_OK; +} + +/******************************************************************* Check if a username is OK. This sets up conn->session_info with a copy related to this vuser that |