source4/auth/auth.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Standardised Authentication types
   4    Copyright (C) Andrew Bartlett   2001
   5    Copyright (C) Stefan Metzmacher 2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #ifndef _SAMBA_AUTH_H
  22 #define _SAMBA_AUTH_H
  23
  24 #include "librpc/gen_ndr/ndr_krb5pac.h"
  25 #include "../auth/common_auth.h"
  26
  27 extern const char *krbtgt_attrs[];
  28 extern const char *server_attrs[];
  29 extern const char *user_attrs[];
  30
  31 union netr_Validation;
  32 struct netr_SamBaseInfo;
  33 struct netr_SamInfo3;
  34 struct loadparm_context;
  35
  36 /* modules can use the following to determine if the interface has changed
  37  * please increment the version number after each interface change
  38  * with a comment and maybe update struct auth_critical_sizes.
  39  */
  40 /* version 1 - version from samba 3.0 - metze */
  41 /* version 2 - initial samba4 version - metze */
  42 /* version 3 - subsequent samba4 version - abartlet */
  43 /* version 4 - subsequent samba4 version - metze */
  44 /* version 0 - till samba4 is stable - metze */
  45 #define AUTH_INTERFACE_VERSION 0
  46
  47 #define AUTH_SESSION_INFO_DEFAULT_GROUPS     0x01 /* Add the user to the default world and network groups */
  48 #define AUTH_SESSION_INFO_AUTHENTICATED      0x02 /* Add the user to the 'authenticated users' group */
  49 #define AUTH_SESSION_INFO_SIMPLE_PRIVILEGES  0x04 /* Use a trivial map between users and privilages, rather than a DB */
  50
  51 struct auth_serversupplied_info
  52 {
  53         struct dom_sid *account_sid;
  54         struct dom_sid *primary_group_sid;
  55
  56         size_t n_domain_groups;
  57         struct dom_sid **domain_groups;
  58
  59         DATA_BLOB user_session_key;
  60         DATA_BLOB lm_session_key;
  61
  62         const char *account_name;
  63         const char *domain_name;
  64
  65         const char *full_name;
  66         const char *logon_script;
  67         const char *profile_path;
  68         const char *home_directory;
  69         const char *home_drive;
  70         const char *logon_server;
  71
  72         NTTIME last_logon;
  73         NTTIME last_logoff;
  74         NTTIME acct_expiry;
  75         NTTIME last_password_change;
  76         NTTIME allow_password_change;
  77         NTTIME force_password_change;
  78
  79         uint16_t logon_count;
  80         uint16_t bad_password_count;
  81
  82         uint32_t acct_flags;
  83
  84         bool authenticated;
  85
  86         struct PAC_SIGNATURE_DATA pac_srv_sig, pac_kdc_sig;
  87 };
  88
  89 struct auth_method_context;
  90 struct auth_check_password_request;
  91 struct auth_context;
  92 struct auth_session_info;
  93 struct ldb_dn;
  94
  95 struct auth_operations {
  96         const char *name;
  97
  98         /* If you are using this interface, then you are probably
  99          * getting something wrong.  This interface is only for
 100          * security=server, and makes a number of compromises to allow
 101          * that.  It is not compatible with being a PDC.  */
 102
 103         NTSTATUS (*get_challenge)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8]);
 104
 105         /* Given the user supplied info, check if this backend want to handle the password checking */
 106
 107         NTSTATUS (*want_check)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 108                                const struct auth_usersupplied_info *user_info);
 109
 110         /* Given the user supplied info, check a password */
 111
 112         NTSTATUS (*check_password)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 113                                    const struct auth_usersupplied_info *user_info,
 114                                    struct auth_serversupplied_info **server_info);
 115
 116         /* Lookup a 'server info' return based only on the principal */
 117         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 118                                               struct auth_context *auth_context,
 119                                               const char *principal,
 120                                               struct ldb_dn *user_dn,
 121                                               struct auth_serversupplied_info **server_info);
 122 };
 123
 124 struct auth_method_context {
 125         struct auth_method_context *prev, *next;
 126         struct auth_context *auth_ctx;
 127         const struct auth_operations *ops;
 128         int depth;
 129         void *private_data;
 130 };
 131
 132 struct auth_context {
 133         struct {
 134                 /* Who set this up in the first place? */
 135                 const char *set_by;
 136
 137                 bool may_be_modified;
 138
 139                 DATA_BLOB data;
 140         } challenge;
 141
 142         /* methods, in the order they should be called */
 143         struct auth_method_context *methods;
 144
 145         /* the event context to use for calls that can block */
 146         struct tevent_context *event_ctx;
 147
 148         /* the messaging context which can be used by backends */
 149         struct messaging_context *msg_ctx;
 150
 151         /* loadparm context */
 152         struct loadparm_context *lp_ctx;
 153
 154         /* SAM database for this local machine - to fill in local groups, or to authenticate local NTLM users */
 155         struct ldb_context *sam_ctx;
 156
 157         NTSTATUS (*check_password)(struct auth_context *auth_ctx,
 158                                    TALLOC_CTX *mem_ctx,
 159                                    const struct auth_usersupplied_info *user_info,
 160                                    struct auth_serversupplied_info **server_info);
 161
 162         NTSTATUS (*get_challenge)(struct auth_context *auth_ctx, uint8_t chal[8]);
 163
 164         bool (*challenge_may_be_modified)(struct auth_context *auth_ctx);
 165
 166         NTSTATUS (*set_challenge)(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 167
 168         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 169                                                  struct auth_context *auth_ctx,
 170                                                  const char *principal,
 171                                                  struct ldb_dn *user_dn,
 172                                                  struct auth_serversupplied_info **server_info);
 173
 174         NTSTATUS (*generate_session_info)(TALLOC_CTX *mem_ctx,
 175                                           struct auth_context *auth_context,
 176                                           struct auth_serversupplied_info *server_info,
 177                                           uint32_t session_info_flags,
 178                                           struct auth_session_info **session_info);
 179 };
 180
 181 /* this structure is used by backends to determine the size of some critical types */
 182 struct auth_critical_sizes {
 183         int interface_version;
 184         int sizeof_auth_operations;
 185         int sizeof_auth_methods;
 186         int sizeof_auth_context;
 187         int sizeof_auth_usersupplied_info;
 188         int sizeof_auth_serversupplied_info;
 189 };
 190
 191  NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
 192                            enum auth_password_state to_state,
 193                            const struct auth_usersupplied_info *user_info_in,
 194                            const struct auth_usersupplied_info **user_info_encrypted);
 195
 196 #include "auth/session.h"
 197 #include "auth/system_session_proto.h"
 198
 199 struct ldb_message;
 200 struct ldb_context;
 201 struct gensec_security;
 202
 203 NTSTATUS auth_get_challenge(struct auth_context *auth_ctx, uint8_t chal[8]);
 204 NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 205                             struct ldb_context *sam_ctx,
 206                             uint32_t logon_parameters,
 207                             struct ldb_dn *domain_dn,
 208                             struct ldb_message *msg,
 209                             const char *logon_workstation,
 210                             const char *name_for_logs,
 211                             bool allow_domain_trust,
 212                             bool password_change);
 213 NTSTATUS authsam_expand_nested_groups(struct ldb_context *sam_ctx,
 214                                       struct ldb_val *dn_val, const bool only_childs, const char *filter,
 215                                       TALLOC_CTX *res_sids_ctx, struct dom_sid ***res_sids,
 216                                       unsigned int *num_res_sids);
 217 struct auth_session_info *system_session(struct loadparm_context *lp_ctx);
 218 NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 219                                            const char *netbios_name,
 220                                            const char *domain_name,
 221                                            struct ldb_dn *domain_dn,
 222                                            struct ldb_message *msg,
 223                                            DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 224                                   struct auth_serversupplied_info **_server_info);
 225 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
 226                                            struct loadparm_context *lp_ctx,
 227                                            struct auth_session_info **_session_info) ;
 228 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status);
 229
 230 NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **methods,
 231                                      struct tevent_context *ev,
 232                                      struct messaging_context *msg,
 233                                      struct loadparm_context *lp_ctx,
 234                                      struct ldb_context *sam_ctx,
 235                                      struct auth_context **auth_ctx);
 236
 237 NTSTATUS auth_context_create(TALLOC_CTX *mem_ctx,
 238                              struct tevent_context *ev,
 239                              struct messaging_context *msg,
 240                              struct loadparm_context *lp_ctx,
 241                              struct auth_context **auth_ctx);
 242 NTSTATUS auth_context_create_from_ldb(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct auth_context **auth_ctx);
 243
 244 NTSTATUS auth_check_password(struct auth_context *auth_ctx,
 245                              TALLOC_CTX *mem_ctx,
 246                              const struct auth_usersupplied_info *user_info,
 247                              struct auth_serversupplied_info **server_info);
 248 NTSTATUS auth_init(void);
 249 NTSTATUS auth_register(const struct auth_operations *ops);
 250 NTSTATUS server_service_auth_init(void);
 251 NTSTATUS authenticate_username_pw(TALLOC_CTX *mem_ctx,
 252                                   struct tevent_context *ev,
 253                                   struct messaging_context *msg,
 254                                   struct loadparm_context *lp_ctx,
 255                                   const char *nt4_domain,
 256                                   const char *nt4_username,
 257                                   const char *password,
 258                                   const uint32_t logon_parameters,
 259                                   struct auth_session_info **session_info);
 260
 261 struct tevent_req *auth_check_password_send(TALLOC_CTX *mem_ctx,
 262                                             struct tevent_context *ev,
 263                                             struct auth_context *auth_ctx,
 264                                             const struct auth_usersupplied_info *user_info);
 265 NTSTATUS auth_check_password_recv(struct tevent_req *req,
 266                                   TALLOC_CTX *mem_ctx,
 267                                   struct auth_serversupplied_info **server_info);
 268
 269 bool auth_challenge_may_be_modified(struct auth_context *auth_ctx);
 270 NTSTATUS auth_context_set_challenge(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 271
 272 NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx,
 273                                         struct auth_context *auth_ctx,
 274                                         const char *principal,
 275                                         struct ldb_dn *user_dn,
 276                                         struct auth_serversupplied_info **server_info);
 277
 278 NTSTATUS samba_server_gensec_start(TALLOC_CTX *mem_ctx,
 279                                    struct tevent_context *event_ctx,
 280                                    struct messaging_context *msg_ctx,
 281                                    struct loadparm_context *lp_ctx,
 282                                    struct cli_credentials *server_credentials,
 283                                    const char *target_service,
 284                                    struct gensec_security **gensec_context);
 285
 286 #endif /* _SMBAUTH_H_ */