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