source3/winbindd/winbindd.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8
   9    This library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Lesser General Public
  11    License as published by the Free Software Foundation; either
  12    version 3 of the License, or (at your option) any later version.
  13
  14    This library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Library General Public License for more details.
  18
  19    You should have received a copy of the GNU Lesser General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #ifndef _WINBINDD_H
  24 #define _WINBINDD_H
  25
  26 #include "nsswitch/winbind_struct_protocol.h"
  27 #include "nsswitch/libwbclient/wbclient.h"
  28
  29 #ifdef HAVE_LIBNSCD
  30 #include <libnscd.h>
  31 #endif
  32
  33 #ifdef HAVE_SYS_MMAN_H
  34 #include <sys/mman.h>
  35 #endif
  36
  37 #undef DBGC_CLASS
  38 #define DBGC_CLASS DBGC_WINBIND
  39
  40 #define WB_REPLACE_CHAR         '_'
  41
  42 struct winbindd_fd_event {
  43         struct winbindd_fd_event *next, *prev;
  44         int fd;
  45         int flags; /* see EVENT_FD_* flags */
  46         void (*handler)(struct winbindd_fd_event *fde, int flags);
  47         void *data;
  48         size_t length, done;
  49         void (*finished)(void *private_data, bool success);
  50         void *private_data;
  51 };
  52
  53 struct sid_ctr {
  54         DOM_SID *sid;
  55         bool finished;
  56         const char *domain;
  57         const char *name;
  58         enum lsa_SidType type;
  59 };
  60
  61 struct winbindd_cli_state {
  62         struct winbindd_cli_state *prev, *next;   /* Linked list pointers */
  63         int sock;                                 /* Open socket from client */
  64         pid_t pid;                                /* pid of client */
  65         bool finished;                            /* Can delete from list */
  66         bool write_extra_data;                    /* Write extra_data field */
  67         time_t last_access;                       /* Time of last access (read or write) */
  68         bool privileged;                           /* Is the client 'privileged' */
  69
  70         TALLOC_CTX *mem_ctx;                      /* memory per request */
  71         struct winbindd_request *request;         /* Request from client */
  72         struct winbindd_request _request;
  73         struct tevent_queue *out_queue;
  74         struct winbindd_response response;        /* Respose to client */
  75         bool getpwent_initialized;                /* Has getpwent_state been
  76                                                    * initialized? */
  77         bool getgrent_initialized;                /* Has getgrent_state been
  78                                                    * initialized? */
  79         struct getent_state *getpwent_state;      /* State for getpwent() */
  80         struct getent_state *getgrent_state;      /* State for getgrent() */
  81 };
  82
  83 /* State between get{pw,gr}ent() calls */
  84
  85 struct getent_state {
  86         struct getent_state *prev, *next;
  87         void *sam_entries;
  88         uint32 sam_entry_index, num_sam_entries;
  89         bool got_sam_entries;
  90         fstring domain_name;
  91 };
  92
  93 /* Storage for cached getpwent() user entries */
  94
  95 struct getpwent_user {
  96         fstring name;                        /* Account name */
  97         fstring gecos;                       /* User information */
  98         fstring homedir;                     /* User Home Directory */
  99         fstring shell;                       /* User Login Shell */
 100         DOM_SID user_sid;                    /* NT user and primary group SIDs */
 101         DOM_SID group_sid;
 102 };
 103
 104 /* Server state structure */
 105
 106 typedef struct {
 107         char *acct_name;
 108         char *full_name;
 109         char *homedir;
 110         char *shell;
 111         gid_t primary_gid;                   /* allow the nss_info
 112                                                 backend to set the primary group */
 113         DOM_SID user_sid;                    /* NT user and primary group SIDs */
 114         DOM_SID group_sid;
 115 } WINBIND_USERINFO;
 116
 117 /* Our connection to the DC */
 118
 119 struct winbindd_cm_conn {
 120         struct cli_state *cli;
 121
 122         struct rpc_pipe_client *samr_pipe;
 123         struct policy_handle sam_connect_handle, sam_domain_handle;
 124
 125         struct rpc_pipe_client *lsa_pipe;
 126         struct policy_handle lsa_policy;
 127
 128         struct rpc_pipe_client *netlogon_pipe;
 129 };
 130
 131 struct winbindd_async_request;
 132
 133 /* Async child */
 134
 135 struct winbindd_domain;
 136
 137 struct winbindd_child_dispatch_table {
 138         const char *name;
 139         enum winbindd_cmd struct_cmd;
 140         enum winbindd_result (*struct_fn)(struct winbindd_domain *domain,
 141                                           struct winbindd_cli_state *state);
 142 };
 143
 144 struct winbindd_child {
 145         struct winbindd_child *next, *prev;
 146
 147         pid_t pid;
 148         struct winbindd_domain *domain;
 149         char *logfilename;
 150
 151         struct winbindd_fd_event event;
 152         struct timed_event *lockout_policy_event;
 153         struct timed_event *machine_password_change_event;
 154         struct winbindd_async_request *requests;
 155
 156         const struct winbindd_child_dispatch_table *table;
 157 };
 158
 159 /* Structures to hold per domain information */
 160
 161 struct winbindd_domain {
 162         fstring name;                          /* Domain name (NetBIOS) */
 163         fstring alt_name;                      /* alt Domain name, if any (FQDN for ADS) */
 164         fstring forest_name;                   /* Name of the AD forest we're in */
 165         DOM_SID sid;                           /* SID for this domain */
 166         uint32 domain_flags;                   /* Domain flags from netlogon.h */
 167         uint32 domain_type;                    /* Domain type from netlogon.h */
 168         uint32 domain_trust_attribs;           /* Trust attribs from netlogon.h */
 169         bool initialized;                      /* Did we already ask for the domain mode? */
 170         bool native_mode;                      /* is this a win2k domain in native mode ? */
 171         bool active_directory;                 /* is this a win2k active directory ? */
 172         bool primary;                          /* is this our primary domain ? */
 173         bool internal;                         /* BUILTIN and member SAM */
 174         bool online;                           /* is this domain available ? */
 175         time_t startup_time;                   /* When we set "startup" true. */
 176         bool startup;                          /* are we in the first 30 seconds after startup_time ? */
 177
 178         bool can_do_samlogon_ex; /* Due to the lack of finer control what type
 179                                   * of DC we have, let us try to do a
 180                                   * credential-chain less samlogon_ex call
 181                                   * with AD and schannel. If this fails with
 182                                   * DCERPC_FAULT_OP_RNG_ERROR, then set this
 183                                   * to False. This variable is around so that
 184                                   * we don't have to try _ex every time. */
 185
 186         /* Lookup methods for this domain (LDAP or RPC) */
 187         struct winbindd_methods *methods;
 188
 189         /* the backend methods are used by the cache layer to find the right
 190            backend */
 191         struct winbindd_methods *backend;
 192
 193         /* Private data for the backends (used for connection cache) */
 194
 195         void *private_data;
 196
 197         /*
 198          * idmap config settings, used to tell the idmap child which
 199          * special domain config to use for a mapping
 200          */
 201         bool have_idmap_config;
 202         uint32_t id_range_low, id_range_high;
 203
 204         /* A working DC */
 205         pid_t dc_probe_pid; /* Child we're using to detect the DC. */
 206         fstring dcname;
 207         struct sockaddr_storage dcaddr;
 208
 209         /* Sequence number stuff */
 210
 211         time_t last_seq_check;
 212         uint32 sequence_number;
 213         NTSTATUS last_status;
 214
 215         /* The smb connection */
 216
 217         struct winbindd_cm_conn conn;
 218
 219         /* The child pid we're talking to */
 220
 221         struct winbindd_child child;
 222
 223         /* Callback we use to try put us back online. */
 224
 225         uint32 check_online_timeout;
 226         struct timed_event *check_online_event;
 227
 228         /* Linked list info */
 229
 230         struct winbindd_domain *prev, *next;
 231 };
 232
 233 /* per-domain methods. This is how LDAP vs RPC is selected
 234  */
 235 struct winbindd_methods {
 236         /* does this backend provide a consistent view of the data? (ie. is the primary group
 237            always correct) */
 238         bool consistent;
 239
 240         /* get a list of users, returning a WINBIND_USERINFO for each one */
 241         NTSTATUS (*query_user_list)(struct winbindd_domain *domain,
 242                                    TALLOC_CTX *mem_ctx,
 243                                    uint32 *num_entries,
 244                                    WINBIND_USERINFO **info);
 245
 246         /* get a list of domain groups */
 247         NTSTATUS (*enum_dom_groups)(struct winbindd_domain *domain,
 248                                     TALLOC_CTX *mem_ctx,
 249                                     uint32 *num_entries,
 250                                     struct acct_info **info);
 251
 252         /* get a list of domain local groups */
 253         NTSTATUS (*enum_local_groups)(struct winbindd_domain *domain,
 254                                     TALLOC_CTX *mem_ctx,
 255                                     uint32 *num_entries,
 256                                     struct acct_info **info);
 257
 258         /* convert one user or group name to a sid */
 259         NTSTATUS (*name_to_sid)(struct winbindd_domain *domain,
 260                                 TALLOC_CTX *mem_ctx,
 261                                 enum winbindd_cmd orig_cmd,
 262                                 const char *domain_name,
 263                                 const char *name,
 264                                 DOM_SID *sid,
 265                                 enum lsa_SidType *type);
 266
 267         /* convert a sid to a user or group name */
 268         NTSTATUS (*sid_to_name)(struct winbindd_domain *domain,
 269                                 TALLOC_CTX *mem_ctx,
 270                                 const DOM_SID *sid,
 271                                 char **domain_name,
 272                                 char **name,
 273                                 enum lsa_SidType *type);
 274
 275         NTSTATUS (*rids_to_names)(struct winbindd_domain *domain,
 276                                   TALLOC_CTX *mem_ctx,
 277                                   const DOM_SID *domain_sid,
 278                                   uint32 *rids,
 279                                   size_t num_rids,
 280                                   char **domain_name,
 281                                   char ***names,
 282                                   enum lsa_SidType **types);
 283
 284         /* lookup user info for a given SID */
 285         NTSTATUS (*query_user)(struct winbindd_domain *domain,
 286                                TALLOC_CTX *mem_ctx,
 287                                const DOM_SID *user_sid,
 288                                WINBIND_USERINFO *user_info);
 289
 290         /* lookup all groups that a user is a member of. The backend
 291            can also choose to lookup by username or rid for this
 292            function */
 293         NTSTATUS (*lookup_usergroups)(struct winbindd_domain *domain,
 294                                       TALLOC_CTX *mem_ctx,
 295                                       const DOM_SID *user_sid,
 296                                       uint32 *num_groups, DOM_SID **user_gids);
 297
 298         /* Lookup all aliases that the sids delivered are member of. This is
 299          * to implement 'domain local groups' correctly */
 300         NTSTATUS (*lookup_useraliases)(struct winbindd_domain *domain,
 301                                        TALLOC_CTX *mem_ctx,
 302                                        uint32 num_sids,
 303                                        const DOM_SID *sids,
 304                                        uint32 *num_aliases,
 305                                        uint32 **alias_rids);
 306
 307         /* find all members of the group with the specified group_rid */
 308         NTSTATUS (*lookup_groupmem)(struct winbindd_domain *domain,
 309                                     TALLOC_CTX *mem_ctx,
 310                                     const DOM_SID *group_sid,
 311                                     uint32 *num_names,
 312                                     DOM_SID **sid_mem, char ***names,
 313                                     uint32 **name_types);
 314
 315         /* return the current global sequence number */
 316         NTSTATUS (*sequence_number)(struct winbindd_domain *domain, uint32 *seq);
 317
 318         /* return the lockout policy */
 319         NTSTATUS (*lockout_policy)(struct winbindd_domain *domain,
 320                                    TALLOC_CTX *mem_ctx,
 321                                    struct samr_DomInfo12 *lockout_policy);
 322
 323         /* return the lockout policy */
 324         NTSTATUS (*password_policy)(struct winbindd_domain *domain,
 325                                     TALLOC_CTX *mem_ctx,
 326                                     struct samr_DomInfo1 *password_policy);
 327
 328         /* enumerate trusted domains */
 329         NTSTATUS (*trusted_domains)(struct winbindd_domain *domain,
 330                                     TALLOC_CTX *mem_ctx,
 331                                     uint32 *num_domains,
 332                                     char ***names,
 333                                     char ***alt_names,
 334                                     DOM_SID **dom_sids);
 335 };
 336
 337 /* Filled out by IDMAP backends */
 338 struct winbindd_idmap_methods {
 339   /* Called when backend is first loaded */
 340   bool (*init)(void);
 341
 342   bool (*get_sid_from_uid)(uid_t uid, DOM_SID *sid);
 343   bool (*get_sid_from_gid)(gid_t gid, DOM_SID *sid);
 344
 345   bool (*get_uid_from_sid)(DOM_SID *sid, uid_t *uid);
 346   bool (*get_gid_from_sid)(DOM_SID *sid, gid_t *gid);
 347
 348   /* Called when backend is unloaded */
 349   bool (*close)(void);
 350   /* Called to dump backend status */
 351   void (*status)(void);
 352 };
 353
 354 /* Data structures for dealing with the trusted domain cache */
 355
 356 struct winbindd_tdc_domain {
 357         const char *domain_name;
 358         const char *dns_name;
 359         DOM_SID sid;
 360         uint32 trust_flags;
 361         uint32 trust_attribs;
 362         uint32 trust_type;
 363 };
 364
 365 /* Switch for listing users or groups */
 366 enum ent_type {
 367         LIST_USERS = 0,
 368         LIST_GROUPS,
 369 };
 370
 371 struct WINBINDD_MEMORY_CREDS {
 372         struct WINBINDD_MEMORY_CREDS *next, *prev;
 373         const char *username; /* lookup key. */
 374         uid_t uid;
 375         int ref_count;
 376         size_t len;
 377         uint8_t *nt_hash; /* Base pointer for the following 2 */
 378         uint8_t *lm_hash;
 379         char *pass;
 380 };
 381
 382 struct WINBINDD_CCACHE_ENTRY {
 383         struct WINBINDD_CCACHE_ENTRY *next, *prev;
 384         const char *principal_name;
 385         const char *ccname;
 386         const char *service;
 387         const char *username;
 388         const char *realm;
 389         struct WINBINDD_MEMORY_CREDS *cred_ptr;
 390         int ref_count;
 391         uid_t uid;
 392         time_t create_time;
 393         time_t renew_until;
 394         time_t refresh_time;
 395         struct timed_event *event;
 396 };
 397
 398 #include "winbindd/winbindd_proto.h"
 399
 400 #define WINBINDD_ESTABLISH_LOOP 30
 401 #define WINBINDD_RESCAN_FREQ lp_winbind_cache_time()
 402 #define WINBINDD_PAM_AUTH_KRB5_RENEW_TIME 2592000 /* one month */
 403 #define DOM_SEQUENCE_NONE ((uint32)-1)
 404
 405 #define IS_DOMAIN_OFFLINE(x) ( lp_winbind_offline_logon() && \
 406                                ( get_global_winbindd_state_offline() \
 407                                  || !(x)->online ) )
 408 #define IS_DOMAIN_ONLINE(x) (!IS_DOMAIN_OFFLINE(x))
 409
 410 #endif /* _WINBINDD_H */