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
  26 extern const char *krbtgt_attrs[];
  27 extern const char *server_attrs[];
  28 extern const char *user_attrs[];
  29
  30 union netr_Validation;
  31 struct netr_SamBaseInfo;
  32 struct netr_SamInfo3;
  33 struct loadparm_context;
  34
  35 /* modules can use the following to determine if the interface has changed
  36  * please increment the version number after each interface change
  37  * with a comment and maybe update struct auth_critical_sizes.
  38  */
  39 /* version 1 - version from samba 3.0 - metze */
  40 /* version 2 - initial samba4 version - metze */
  41 /* version 3 - subsequent samba4 version - abartlet */
  42 /* version 4 - subsequent samba4 version - metze */
  43 /* version 0 - till samba4 is stable - metze */
  44 #define AUTH_INTERFACE_VERSION 0
  45
  46 #define USER_INFO_CASE_INSENSITIVE_USERNAME 0x01 /* username may be in any case */
  47 #define USER_INFO_CASE_INSENSITIVE_PASSWORD 0x02 /* password may be in any case */
  48 #define USER_INFO_DONT_CHECK_UNIX_ACCOUNT   0x04 /* don't check unix account status */
  49 #define USER_INFO_INTERACTIVE_LOGON         0x08 /* don't check unix account status */
  50
  51 enum auth_password_state {
  52         AUTH_PASSWORD_RESPONSE,
  53         AUTH_PASSWORD_HASH,
  54         AUTH_PASSWORD_PLAIN
  55 };
  56
  57 struct auth_usersupplied_info
  58 {
  59         const char *workstation_name;
  60         const struct tsocket_address *remote_host;
  61
  62         uint32_t logon_parameters;
  63
  64         bool mapped_state;
  65         /* the values the client gives us */
  66         struct {
  67                 const char *account_name;
  68                 const char *domain_name;
  69         } client, mapped;
  70
  71         enum auth_password_state password_state;
  72
  73         union {
  74                 struct {
  75                         DATA_BLOB lanman;
  76                         DATA_BLOB nt;
  77                 } response;
  78                 struct {
  79                         struct samr_Password *lanman;
  80                         struct samr_Password *nt;
  81                 } hash;
  82
  83                 char *plaintext;
  84         } password;
  85         uint32_t flags;
  86 };
  87
  88 struct auth_serversupplied_info
  89 {
  90         struct dom_sid *account_sid;
  91         struct dom_sid *primary_group_sid;
  92
  93         size_t n_domain_groups;
  94         struct dom_sid **domain_groups;
  95
  96         DATA_BLOB user_session_key;
  97         DATA_BLOB lm_session_key;
  98
  99         const char *account_name;
 100         const char *domain_name;
 101
 102         const char *full_name;
 103         const char *logon_script;
 104         const char *profile_path;
 105         const char *home_directory;
 106         const char *home_drive;
 107         const char *logon_server;
 108
 109         NTTIME last_logon;
 110         NTTIME last_logoff;
 111         NTTIME acct_expiry;
 112         NTTIME last_password_change;
 113         NTTIME allow_password_change;
 114         NTTIME force_password_change;
 115
 116         uint16_t logon_count;
 117         uint16_t bad_password_count;
 118
 119         uint32_t acct_flags;
 120
 121         bool authenticated;
 122
 123         struct PAC_SIGNATURE_DATA pac_srv_sig, pac_kdc_sig;
 124 };
 125
 126 struct auth_method_context;
 127 struct auth_check_password_request;
 128 struct auth_context;
 129
 130 struct auth_operations {
 131         const char *name;
 132
 133         /* If you are using this interface, then you are probably
 134          * getting something wrong.  This interface is only for
 135          * security=server, and makes a number of compromises to allow
 136          * that.  It is not compatible with being a PDC.  */
 137
 138         NTSTATUS (*get_challenge)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8]);
 139
 140         /* Given the user supplied info, check if this backend want to handle the password checking */
 141
 142         NTSTATUS (*want_check)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 143                                const struct auth_usersupplied_info *user_info);
 144
 145         /* Given the user supplied info, check a password */
 146
 147         NTSTATUS (*check_password)(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx,
 148                                    const struct auth_usersupplied_info *user_info,
 149                                    struct auth_serversupplied_info **server_info);
 150
 151         /* Lookup a 'server info' return based only on the principal */
 152         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 153                                               struct auth_context *auth_context,
 154                                               const char *principal,
 155                                               struct auth_serversupplied_info **server_info);
 156 };
 157
 158 struct auth_method_context {
 159         struct auth_method_context *prev, *next;
 160         struct auth_context *auth_ctx;
 161         const struct auth_operations *ops;
 162         int depth;
 163         void *private_data;
 164 };
 165
 166 struct auth_context {
 167         struct {
 168                 /* Who set this up in the first place? */
 169                 const char *set_by;
 170
 171                 bool may_be_modified;
 172
 173                 DATA_BLOB data;
 174         } challenge;
 175
 176         /* methods, in the order they should be called */
 177         struct auth_method_context *methods;
 178
 179         /* the event context to use for calls that can block */
 180         struct tevent_context *event_ctx;
 181
 182         /* the messaging context which can be used by backends */
 183         struct messaging_context *msg_ctx;
 184
 185         /* loadparm context */
 186         struct loadparm_context *lp_ctx;
 187
 188         NTSTATUS (*check_password)(struct auth_context *auth_ctx,
 189                                    TALLOC_CTX *mem_ctx,
 190                                    const struct auth_usersupplied_info *user_info,
 191                                    struct auth_serversupplied_info **server_info);
 192
 193         NTSTATUS (*get_challenge)(struct auth_context *auth_ctx, uint8_t chal[8]);
 194
 195         bool (*challenge_may_be_modified)(struct auth_context *auth_ctx);
 196
 197         NTSTATUS (*set_challenge)(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 198
 199         NTSTATUS (*get_server_info_principal)(TALLOC_CTX *mem_ctx,
 200                                               struct auth_context *auth_context,
 201                                               const char *principal,
 202                                               struct auth_serversupplied_info **server_info);
 203
 204 };
 205
 206 /* this structure is used by backends to determine the size of some critical types */
 207 struct auth_critical_sizes {
 208         int interface_version;
 209         int sizeof_auth_operations;
 210         int sizeof_auth_methods;
 211         int sizeof_auth_context;
 212         int sizeof_auth_usersupplied_info;
 213         int sizeof_auth_serversupplied_info;
 214 };
 215
 216  NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
 217                            enum auth_password_state to_state,
 218                            const struct auth_usersupplied_info *user_info_in,
 219                            const struct auth_usersupplied_info **user_info_encrypted);
 220
 221 #include "auth/session.h"
 222 #include "auth/system_session_proto.h"
 223
 224 struct ldb_message;
 225 struct ldb_context;
 226 struct ldb_dn;
 227 struct gensec_security;
 228
 229 NTSTATUS auth_get_challenge(struct auth_context *auth_ctx, uint8_t chal[8]);
 230 NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 231                             struct ldb_context *sam_ctx,
 232                             uint32_t logon_parameters,
 233                             struct ldb_dn *domain_dn,
 234                             struct ldb_message *msg,
 235                             const char *logon_workstation,
 236                             const char *name_for_logs,
 237                             bool allow_domain_trust,
 238                             bool password_change);
 239 struct auth_session_info *system_session(struct loadparm_context *lp_ctx);
 240 NTSTATUS authsam_expand_nested_groups(struct ldb_context *sam_ctx,
 241                                       const struct dom_sid *sid,
 242                                       const bool only_childs,
 243                                       TALLOC_CTX *res_sids_ctx,
 244                                       struct dom_sid ***res_sids,
 245                                       unsigned int *num_res_sids);
 246 NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 247                                            const char *netbios_name,
 248                                            const char *domain_name,
 249                                            struct ldb_dn *domain_dn,
 250                                            struct ldb_message *msg,
 251                                            DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 252                                   struct auth_serversupplied_info **_server_info);
 253 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
 254                                            struct loadparm_context *lp_ctx,
 255                                            struct auth_session_info **_session_info) ;
 256 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status);
 257
 258 NTSTATUS auth_context_create_methods(TALLOC_CTX *mem_ctx, const char **methods,
 259                                      struct tevent_context *ev,
 260                                      struct messaging_context *msg,
 261                                      struct loadparm_context *lp_ctx,
 262                                      struct auth_context **auth_ctx);
 263
 264 NTSTATUS auth_context_create(TALLOC_CTX *mem_ctx,
 265                              struct tevent_context *ev,
 266                              struct messaging_context *msg,
 267                              struct loadparm_context *lp_ctx,
 268                              struct auth_context **auth_ctx);
 269
 270 NTSTATUS auth_check_password(struct auth_context *auth_ctx,
 271                              TALLOC_CTX *mem_ctx,
 272                              const struct auth_usersupplied_info *user_info,
 273                              struct auth_serversupplied_info **server_info);
 274 NTSTATUS auth_init(void);
 275 NTSTATUS auth_register(const struct auth_operations *ops);
 276 NTSTATUS authenticate_username_pw(TALLOC_CTX *mem_ctx,
 277                                            struct tevent_context *ev,
 278                                            struct messaging_context *msg,
 279                                            struct loadparm_context *lp_ctx,
 280                                            const char *nt4_domain,
 281                                            const char *nt4_username,
 282                                            const char *password,
 283                                            struct auth_session_info **session_info);
 284
 285 struct tevent_req *auth_check_password_send(TALLOC_CTX *mem_ctx,
 286                                             struct tevent_context *ev,
 287                                             struct auth_context *auth_ctx,
 288                                             const struct auth_usersupplied_info *user_info);
 289 NTSTATUS auth_check_password_recv(struct tevent_req *req,
 290                                   TALLOC_CTX *mem_ctx,
 291                                   struct auth_serversupplied_info **server_info);
 292
 293 bool auth_challenge_may_be_modified(struct auth_context *auth_ctx);
 294 NTSTATUS auth_context_set_challenge(struct auth_context *auth_ctx, const uint8_t chal[8], const char *set_by);
 295
 296 NTSTATUS auth_get_server_info_principal(TALLOC_CTX *mem_ctx,
 297                                         struct auth_context *auth_ctx,
 298                                         const char *principal,
 299                                         struct auth_serversupplied_info **server_info);
 300
 301 NTSTATUS samba_server_gensec_start(TALLOC_CTX *mem_ctx,
 302                                    struct tevent_context *event_ctx,
 303                                    struct messaging_context *msg_ctx,
 304                                    struct loadparm_context *lp_ctx,
 305                                    struct cli_credentials *server_credentials,
 306                                    const char *target_service,
 307                                    struct gensec_security **gensec_context);
 308
 309 #endif /* _SMBAUTH_H_ */