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
  50 struct auth_serversupplied_info
  51 {
  52         struct dom_sid *account_sid;
  53         struct dom_sid *primary_group_sid;
  54
  55         size_t n_domain_groups;
  56         struct dom_sid **domain_groups;
  57
  58         DATA_BLOB user_session_key;
  59         DATA_BLOB lm_session_key;
  60
  61         const char *account_name;
  62         const char *domain_name;
  63
  64         const char *full_name;
  65         const char *logon_script;
  66         const char *profile_path;
  67         const char *home_directory;
  68         const char *home_drive;
  69         const char *logon_server;
  70
  71         NTTIME last_logon;
  72         NTTIME last_logoff;
  73         NTTIME acct_expiry;
  74         NTTIME last_password_change;
  75         NTTIME allow_password_change;
  76         NTTIME force_password_change;
  77
  78         uint16_t logon_count;
  79         uint16_t bad_password_count;
  80
  81         uint32_t acct_flags;
  82
  83         bool authenticated;
  84
  85         struct PAC_SIGNATURE_DATA pac_srv_sig, pac_kdc_sig;
  86 };
  87
  88 struct auth_method_context;
  89 struct auth_check_password_request;
  90 struct auth_context;
  91 struct auth_session_info;
  92 struct ldb_dn;
  93
  94 struct auth_operations {
  95         const char *name;
  96
  97         /* If you are using this interface, then you are probably
  98          * getting something wrong.  This interface is only for
  99          * security=server, and makes a number of compromises to allow
 100          * that.  It is not compatible with being a PDC.  */
 101
 102         NTSTATUS (*get_challenge)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8]);
 103
 104         /* Given the user supplied info, check if this backend want to handle the password checking */
 105
 106         NTSTATUS (*want_check)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 107                                const struct auth_usersupplied_info *user_info);
 108
 109         /* Given the user supplied info, check a password */
 110
 111         NTSTATUS (*check_password)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 112                                    const struct auth_usersupplied_info *user_info,
 113                                    struct auth_serversupplied_info **server_info);
 114
 115         /* Lookup a 'server info' return based only on the principal */
 116         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 117                                               struct auth_context *auth_context,
 118                                               const char *principal,
 119                                               struct ldb_dn *user_dn,
 120                                               struct auth_serversupplied_info **server_info);
 121 };
 122
 123 struct auth_method_context {
 124         struct auth_method_context *prev, *next;
 125         struct auth_context *auth_ctx;
 126         const struct auth_operations *ops;
 127         int depth;
 128         void *private_data;
 129 };
 130
 131 struct auth_context {
 132         struct {
 133                 /* Who set this up in the first place? */
 134                 const char *set_by;
 135
 136                 bool may_be_modified;
 137
 138                 DATA_BLOB data;
 139         } challenge;
 140
 141         /* methods, in the order they should be called */
 142         struct auth_method_context *methods;
 143
 144         /* the event context to use for calls that can block */
 145         struct tevent_context *event_ctx;
 146
 147         /* the messaging context which can be used by backends */
 148         struct messaging_context *msg_ctx;
 149
 150         /* loadparm context */
 151         struct loadparm_context *lp_ctx;
 152
 153         /* SAM database for this local machine - to fill in local groups, or to authenticate local NTLM users */
 154         struct ldb_context *sam_ctx;
 155
 156         NTSTATUS (*check_password)(struct auth_context *auth_ctx,
 157                                    TALLOC_CTX *mem_ctx,
 158                                    const struct auth_usersupplied_info *user_info,
 159                                    struct auth_serversupplied_info **server_info);
 160
 161         NTSTATUS (*get_challenge)(struct auth_context *auth_ctx, uint8_t chal[8]);
 162
 163         bool (*challenge_may_be_modified)(struct auth_context *auth_ctx);
 164
 165         NTSTATUS (*set_challenge)(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 166
 167         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 168                                                  struct auth_context *auth_ctx,
 169                                                  const char *principal,
 170                                                  struct ldb_dn *user_dn,
 171                                                  struct auth_serversupplied_info **server_info);
 172
 173         NTSTATUS (*generate_session_info)(TALLOC_CTX *mem_ctx,
 174                                           struct auth_context *auth_context,
 175                                           struct auth_serversupplied_info *server_info,
 176                                           uint32_t session_info_flags,
 177                                           struct auth_session_info **session_info);
 178 };
 179
 180 /* this structure is used by backends to determine the size of some critical types */
 181 struct auth_critical_sizes {
 182         int interface_version;
 183         int sizeof_auth_operations;
 184         int sizeof_auth_methods;
 185         int sizeof_auth_context;
 186         int sizeof_auth_usersupplied_info;
 187         int sizeof_auth_serversupplied_info;
 188 };
 189
 190  NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
 191                            enum auth_password_state to_state,
 192                            const struct auth_usersupplied_info *user_info_in,
 193                            const struct auth_usersupplied_info **user_info_encrypted);
 194
 195 #include "auth/session.h"
 196 #include "auth/system_session_proto.h"
 197
 198 struct ldb_message;
 199 struct ldb_context;
 200 struct gensec_security;
 201
 202 NTSTATUS auth_get_challenge(struct auth_context *auth_ctx, uint8_t chal[8]);
 203 NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 204                             struct ldb_context *sam_ctx,
 205                             uint32_t logon_parameters,
 206                             struct ldb_dn *domain_dn,
 207                             struct ldb_message *msg,
 208                             const char *logon_workstation,
 209                             const char *name_for_logs,
 210                             bool allow_domain_trust,
 211                             bool password_change);
 212 NTSTATUS authsam_expand_nested_groups(struct ldb_context *sam_ctx,
 213                                       struct ldb_val *dn_val, const bool only_childs, const char *filter,
 214                                       TALLOC_CTX *res_sids_ctx, struct dom_sid ***res_sids,
 215                                       unsigned int *num_res_sids);
 216 struct auth_session_info *system_session(struct loadparm_context *lp_ctx);
 217 NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 218                                            const char *netbios_name,
 219                                            const char *domain_name,
 220                                            struct ldb_dn *domain_dn,
 221                                            struct ldb_message *msg,
 222                                            DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 223                                   struct auth_serversupplied_info **_server_info);
 224 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
 225                                            struct loadparm_context *lp_ctx,
 226                                            struct auth_session_info **_session_info) ;
 227 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status);
 228
 229 NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **methods,
 230                                      struct tevent_context *ev,
 231                                      struct messaging_context *msg,
 232                                      struct loadparm_context *lp_ctx,
 233                                      struct ldb_context *sam_ctx,
 234                                      struct auth_context **auth_ctx);
 235
 236 NTSTATUS auth_context_create(TALLOC_CTX *mem_ctx,
 237                              struct tevent_context *ev,
 238                              struct messaging_context *msg,
 239                              struct loadparm_context *lp_ctx,
 240                              struct auth_context **auth_ctx);
 241 NTSTATUS auth_context_create_from_ldb(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct auth_context **auth_ctx);
 242
 243 NTSTATUS auth_check_password(struct auth_context *auth_ctx,
 244                              TALLOC_CTX *mem_ctx,
 245                              const struct auth_usersupplied_info *user_info,
 246                              struct auth_serversupplied_info **server_info);
 247 NTSTATUS auth_init(void);
 248 NTSTATUS auth_register(const struct auth_operations *ops);
 249 NTSTATUS server_service_auth_init(void);
 250 NTSTATUS authenticate_username_pw(TALLOC_CTX *mem_ctx,
 251                                   struct tevent_context *ev,
 252                                   struct messaging_context *msg,
 253                                   struct loadparm_context *lp_ctx,
 254                                   const char *nt4_domain,
 255                                   const char *nt4_username,
 256                                   const char *password,
 257                                   const uint32_t logon_parameters,
 258                                   struct auth_session_info **session_info);
 259
 260 struct tevent_req *auth_check_password_send(TALLOC_CTX *mem_ctx,
 261                                             struct tevent_context *ev,
 262                                             struct auth_context *auth_ctx,
 263                                             const struct auth_usersupplied_info *user_info);
 264 NTSTATUS auth_check_password_recv(struct tevent_req *req,
 265                                   TALLOC_CTX *mem_ctx,
 266                                   struct auth_serversupplied_info **server_info);
 267
 268 bool auth_challenge_may_be_modified(struct auth_context *auth_ctx);
 269 NTSTATUS auth_context_set_challenge(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 270
 271 NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx,
 272                                         struct auth_context *auth_ctx,
 273                                         const char *principal,
 274                                         struct ldb_dn *user_dn,
 275                                         struct auth_serversupplied_info **server_info);
 276
 277 NTSTATUS samba_server_gensec_start(TALLOC_CTX *mem_ctx,
 278                                    struct tevent_context *event_ctx,
 279                                    struct messaging_context *msg_ctx,
 280                                    struct loadparm_context *lp_ctx,
 281                                    struct cli_credentials *server_credentials,
 282                                    const char *target_service,
 283                                    struct gensec_security **gensec_context);
 284
 285 #endif /* _SMBAUTH_H_ */