auth/gensec/gensec.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Generic Authentication Interface
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program 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
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #ifndef __GENSEC_H__
  24 #define __GENSEC_H__
  25
  26 #include "../lib/util/data_blob.h"
  27 #include "libcli/util/ntstatus.h"
  28
  29 #define GENSEC_SASL_NAME_NTLMSSP "NTLM"
  30
  31 #define GENSEC_OID_NTLMSSP "1.3.6.1.4.1.311.2.2.10"
  32 #define GENSEC_OID_SPNEGO "1.3.6.1.5.5.2"
  33 #define GENSEC_OID_KERBEROS5 "1.2.840.113554.1.2.2"
  34 #define GENSEC_OID_KERBEROS5_OLD "1.2.840.48018.1.2.2"
  35 #define GENSEC_OID_KERBEROS5_USER2USER "1.2.840.113554.1.2.2.3"
  36
  37 enum gensec_priority {
  38         GENSEC_SPNEGO = 90,
  39         GENSEC_GSSAPI = 80,
  40         GENSEC_KRB5 = 70,
  41         GENSEC_SCHANNEL = 60,
  42         GENSEC_NTLMSSP = 50,
  43         GENSEC_SASL = 20,
  44         GENSEC_OTHER = 0
  45 };
  46
  47 struct gensec_security;
  48 struct gensec_target {
  49         const char *principal;
  50         const char *hostname;
  51         const char *service;
  52 };
  53
  54 #define GENSEC_FEATURE_SESSION_KEY      0x00000001
  55 #define GENSEC_FEATURE_SIGN             0x00000002
  56 #define GENSEC_FEATURE_SEAL             0x00000004
  57 #define GENSEC_FEATURE_DCE_STYLE        0x00000008
  58 #define GENSEC_FEATURE_ASYNC_REPLIES    0x00000010
  59 #define GENSEC_FEATURE_DATAGRAM_MODE    0x00000020
  60 #define GENSEC_FEATURE_SIGN_PKT_HEADER  0x00000040
  61 #define GENSEC_FEATURE_NEW_SPNEGO       0x00000080
  62 #define GENSEC_FEATURE_UNIX_TOKEN       0x00000100
  63
  64 #define GENSEC_EXPIRE_TIME_INFINITY (NTTIME)0x8000000000000000LL
  65
  66 /* GENSEC mode */
  67 enum gensec_role
  68 {
  69         GENSEC_SERVER,
  70         GENSEC_CLIENT
  71 };
  72
  73 struct auth_session_info;
  74 struct cli_credentials;
  75 struct gensec_settings;
  76 struct tevent_context;
  77 struct tevent_req;
  78 struct smb_krb5_context;
  79
  80 struct gensec_settings {
  81         struct loadparm_context *lp_ctx;
  82         const char *target_hostname;
  83
  84         /* this allows callers to specify a specific set of ops that
  85          * should be used, rather than those loaded by the plugin
  86          * mechanism */
  87         struct gensec_security_ops **backends;
  88
  89         /* To fill in our own name in the NTLMSSP server */
  90         const char *server_dns_domain;
  91         const char *server_dns_name;
  92         const char *server_netbios_domain;
  93         const char *server_netbios_name;
  94 };
  95
  96 struct gensec_security_ops {
  97         const char *name;
  98         const char *sasl_name;
  99         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
 100         const char **oid;  /* NULL if not offered by SPNEGO */
 101         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
 102         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
 103         /**
 104            Determine if a packet has the right 'magic' for this mechanism
 105         */
 106         NTSTATUS (*magic)(struct gensec_security *gensec_security,
 107                           const DATA_BLOB *first_packet);
 108         NTSTATUS (*update)(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 109                            struct tevent_context *ev,
 110                            const DATA_BLOB in, DATA_BLOB *out);
 111         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 112                                 uint8_t *data, size_t length,
 113                                 const uint8_t *whole_pdu, size_t pdu_length,
 114                                 DATA_BLOB *sig);
 115         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 116                                 const uint8_t *data, size_t length,
 117                                 const uint8_t *whole_pdu, size_t pdu_length,
 118                                 DATA_BLOB *sig);
 119         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
 120         size_t   (*max_input_size)(struct gensec_security *gensec_security);
 121         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
 122         NTSTATUS (*check_packet)(struct gensec_security *gensec_security,
 123                                  const uint8_t *data, size_t length,
 124                                  const uint8_t *whole_pdu, size_t pdu_length,
 125                                  const DATA_BLOB *sig);
 126         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security,
 127                                   uint8_t *data, size_t length,
 128                                   const uint8_t *whole_pdu, size_t pdu_length,
 129                                   const DATA_BLOB *sig);
 130         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
 131                                   TALLOC_CTX *mem_ctx,
 132                                   const DATA_BLOB *in,
 133                                   DATA_BLOB *out);
 134         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
 135                            TALLOC_CTX *mem_ctx,
 136                            const DATA_BLOB *in,
 137                            DATA_BLOB *out);
 138         NTSTATUS (*wrap_packets)(struct gensec_security *gensec_security,
 139                                  TALLOC_CTX *mem_ctx,
 140                                  const DATA_BLOB *in,
 141                                  DATA_BLOB *out,
 142                                  size_t *len_processed);
 143         NTSTATUS (*unwrap_packets)(struct gensec_security *gensec_security,
 144                                    TALLOC_CTX *mem_ctx,
 145                                    const DATA_BLOB *in,
 146                                    DATA_BLOB *out,
 147                                    size_t *len_processed);
 148         NTSTATUS (*packet_full_request)(struct gensec_security *gensec_security,
 149                                         DATA_BLOB blob, size_t *size);
 150         NTSTATUS (*session_key)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 151                                 DATA_BLOB *session_key);
 152         NTSTATUS (*session_info)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 153                                  struct auth_session_info **session_info);
 154         void (*want_feature)(struct gensec_security *gensec_security,
 155                                     uint32_t feature);
 156         bool (*have_feature)(struct gensec_security *gensec_security,
 157                                     uint32_t feature);
 158         NTTIME (*expire_time)(struct gensec_security *gensec_security);
 159         bool enabled;
 160         bool kerberos;
 161         enum gensec_priority priority;
 162 };
 163
 164 struct gensec_security_ops_wrapper {
 165         const struct gensec_security_ops *op;
 166         const char *oid;
 167 };
 168
 169 #define GENSEC_INTERFACE_VERSION 0
 170
 171 struct gensec_security {
 172         const struct gensec_security_ops *ops;
 173         void *private_data;
 174         struct cli_credentials *credentials;
 175         struct gensec_target target;
 176         enum gensec_role gensec_role;
 177         bool subcontext;
 178         uint32_t want_features;
 179         uint32_t max_update_size;
 180         uint8_t dcerpc_auth_level;
 181         struct tsocket_address *local_addr, *remote_addr;
 182         struct gensec_settings *settings;
 183
 184         /* When we are a server, this may be filled in to provide an
 185          * NTLM authentication backend, and user lookup (such as if no
 186          * PAC is found) */
 187         struct auth4_context *auth_context;
 188 };
 189
 190 /* this structure is used by backends to determine the size of some critical types */
 191 struct gensec_critical_sizes {
 192         int interface_version;
 193         int sizeof_gensec_security_ops;
 194         int sizeof_gensec_security;
 195 };
 196 const struct gensec_critical_sizes *gensec_interface_version(void);
 197
 198 /* Socket wrapper */
 199
 200 struct gensec_security;
 201 struct socket_context;
 202 struct auth4_context;
 203 struct auth_user_info_dc;
 204
 205 /* These functions are for use here only (public because SPNEGO must
 206  * use them for recursion) */
 207 NTSTATUS gensec_wrap_packets(struct gensec_security *gensec_security,
 208                              TALLOC_CTX *mem_ctx,
 209                              const DATA_BLOB *in,
 210                              DATA_BLOB *out,
 211                              size_t *len_processed);
 212 /* These functions are for use here only (public because SPNEGO must
 213  * use them for recursion) */
 214 NTSTATUS gensec_unwrap_packets(struct gensec_security *gensec_security,
 215                                TALLOC_CTX *mem_ctx,
 216                                const DATA_BLOB *in,
 217                                DATA_BLOB *out,
 218                                size_t *len_processed);
 219
 220 /* These functions are for use here only (public because SPNEGO must
 221  * use them for recursion) */
 222 NTSTATUS gensec_packet_full_request(struct gensec_security *gensec_security,
 223                                     DATA_BLOB blob, size_t *size);
 224
 225 struct loadparm_context;
 226
 227 NTSTATUS gensec_subcontext_start(TALLOC_CTX *mem_ctx,
 228                                  struct gensec_security *parent,
 229                                  struct gensec_security **gensec_security);
 230 NTSTATUS gensec_client_start(TALLOC_CTX *mem_ctx,
 231                              struct gensec_security **gensec_security,
 232                              struct gensec_settings *settings);
 233 NTSTATUS gensec_start_mech_by_ops(struct gensec_security *gensec_security,
 234                                   const struct gensec_security_ops *ops);
 235 NTSTATUS gensec_start_mech_by_sasl_list(struct gensec_security *gensec_security,
 236                                                  const char **sasl_names);
 237 void gensec_set_max_update_size(struct gensec_security *gensec_security,
 238                                 uint32_t max_update_size);
 239 size_t gensec_max_update_size(struct gensec_security *gensec_security);
 240 NTSTATUS gensec_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 241                        struct tevent_context *ev,
 242                        const DATA_BLOB in, DATA_BLOB *out);
 243 struct tevent_req *gensec_update_send(TALLOC_CTX *mem_ctx,
 244                                       struct tevent_context *ev,
 245                                       struct gensec_security *gensec_security,
 246                                       const DATA_BLOB in);
 247 NTSTATUS gensec_update_recv(struct tevent_req *req, TALLOC_CTX *out_mem_ctx, DATA_BLOB *out);
 248 void gensec_want_feature(struct gensec_security *gensec_security,
 249                          uint32_t feature);
 250 bool gensec_have_feature(struct gensec_security *gensec_security,
 251                          uint32_t feature);
 252 NTTIME gensec_expire_time(struct gensec_security *gensec_security);
 253 NTSTATUS gensec_set_credentials(struct gensec_security *gensec_security, struct cli_credentials *credentials);
 254 NTSTATUS gensec_set_target_service(struct gensec_security *gensec_security, const char *service);
 255 const char *gensec_get_target_service(struct gensec_security *gensec_security);
 256 NTSTATUS gensec_set_target_hostname(struct gensec_security *gensec_security, const char *hostname);
 257 const char *gensec_get_target_hostname(struct gensec_security *gensec_security);
 258 NTSTATUS gensec_session_key(struct gensec_security *gensec_security,
 259                             TALLOC_CTX *mem_ctx,
 260                             DATA_BLOB *session_key);
 261 NTSTATUS gensec_start_mech_by_oid(struct gensec_security *gensec_security,
 262                                   const char *mech_oid);
 263 const char *gensec_get_name_by_oid(struct gensec_security *gensec_security, const char *oid_string);
 264 struct cli_credentials *gensec_get_credentials(struct gensec_security *gensec_security);
 265 NTSTATUS gensec_init(void);
 266 NTSTATUS gensec_register(const struct gensec_security_ops *ops);
 267 const struct gensec_security_ops *gensec_security_by_oid(struct gensec_security *gensec_security,
 268                                                          const char *oid_string);
 269 const struct gensec_security_ops *gensec_security_by_sasl_name(struct gensec_security *gensec_security,
 270                                                                const char *sasl_name);
 271 struct gensec_security_ops **gensec_security_mechs(struct gensec_security *gensec_security,
 272                                                    TALLOC_CTX *mem_ctx);
 273 const struct gensec_security_ops_wrapper *gensec_security_by_oid_list(
 274                                         struct gensec_security *gensec_security,
 275                                         TALLOC_CTX *mem_ctx,
 276                                         const char **oid_strings,
 277                                         const char *skip);
 278 const char **gensec_security_oids(struct gensec_security *gensec_security,
 279                                   TALLOC_CTX *mem_ctx,
 280                                   const char *skip);
 281 const char **gensec_security_oids_from_ops_wrapped(TALLOC_CTX *mem_ctx,
 282                                 const struct gensec_security_ops_wrapper *wops);
 283 size_t gensec_max_input_size(struct gensec_security *gensec_security);
 284 size_t gensec_max_wrapped_size(struct gensec_security *gensec_security);
 285 NTSTATUS gensec_unseal_packet(struct gensec_security *gensec_security,
 286                               uint8_t *data, size_t length,
 287                               const uint8_t *whole_pdu, size_t pdu_length,
 288                               const DATA_BLOB *sig);
 289 NTSTATUS gensec_check_packet(struct gensec_security *gensec_security,
 290                              const uint8_t *data, size_t length,
 291                              const uint8_t *whole_pdu, size_t pdu_length,
 292                              const DATA_BLOB *sig);
 293 size_t gensec_sig_size(struct gensec_security *gensec_security, size_t data_size);
 294 NTSTATUS gensec_seal_packet(struct gensec_security *gensec_security,
 295                             TALLOC_CTX *mem_ctx,
 296                             uint8_t *data, size_t length,
 297                             const uint8_t *whole_pdu, size_t pdu_length,
 298                             DATA_BLOB *sig);
 299 NTSTATUS gensec_sign_packet(struct gensec_security *gensec_security,
 300                             TALLOC_CTX *mem_ctx,
 301                             const uint8_t *data, size_t length,
 302                             const uint8_t *whole_pdu, size_t pdu_length,
 303                             DATA_BLOB *sig);
 304 NTSTATUS gensec_start_mech(struct gensec_security *gensec_security);
 305 NTSTATUS gensec_start_mech_by_authtype(struct gensec_security *gensec_security,
 306                                        uint8_t auth_type, uint8_t auth_level);
 307 const char *gensec_get_name_by_authtype(struct gensec_security *gensec_security, uint8_t authtype);
 308 NTSTATUS gensec_server_start(TALLOC_CTX *mem_ctx,
 309                              struct gensec_settings *settings,
 310                              struct auth4_context *auth_context,
 311                              struct gensec_security **gensec_security);
 312 NTSTATUS gensec_session_info(struct gensec_security *gensec_security,
 313                              TALLOC_CTX *mem_ctx,
 314                              struct auth_session_info **session_info);
 315
 316 NTSTATUS gensec_set_local_address(struct gensec_security *gensec_security,
 317                 const struct tsocket_address *local);
 318 NTSTATUS gensec_set_remote_address(struct gensec_security *gensec_security,
 319                 const struct tsocket_address *remote);
 320 const struct tsocket_address *gensec_get_local_address(struct gensec_security *gensec_security);
 321 const struct tsocket_address *gensec_get_remote_address(struct gensec_security *gensec_security);
 322
 323 NTSTATUS gensec_start_mech_by_name(struct gensec_security *gensec_security,
 324                                         const char *name);
 325
 326 NTSTATUS gensec_unwrap(struct gensec_security *gensec_security,
 327                        TALLOC_CTX *mem_ctx,
 328                        const DATA_BLOB *in,
 329                        DATA_BLOB *out);
 330 NTSTATUS gensec_wrap(struct gensec_security *gensec_security,
 331                      TALLOC_CTX *mem_ctx,
 332                      const DATA_BLOB *in,
 333                      DATA_BLOB *out);
 334
 335 struct gensec_security_ops **gensec_security_all(void);
 336 bool gensec_security_ops_enabled(struct gensec_security_ops *ops, struct gensec_security *security);
 337 struct gensec_security_ops **gensec_use_kerberos_mechs(TALLOC_CTX *mem_ctx,
 338                                                        struct gensec_security_ops **old_gensec_list,
 339                                                        struct cli_credentials *creds);
 340
 341 NTSTATUS gensec_start_mech_by_sasl_name(struct gensec_security *gensec_security,
 342                                         const char *sasl_name);
 343
 344 int gensec_setting_int(struct gensec_settings *settings, const char *mechanism, const char *name, int default_value);
 345 bool gensec_setting_bool(struct gensec_settings *settings, const char *mechanism, const char *name, bool default_value);
 346
 347 NTSTATUS gensec_set_target_principal(struct gensec_security *gensec_security, const char *principal);
 348 const char *gensec_get_target_principal(struct gensec_security *gensec_security);
 349
 350 NTSTATUS gensec_generate_session_info_pac(TALLOC_CTX *mem_ctx,
 351                                           struct gensec_security *gensec_security,
 352                                           struct smb_krb5_context *smb_krb5_context,
 353                                           DATA_BLOB *pac_blob,
 354                                           const char *principal_string,
 355                                           const struct tsocket_address *remote_address,
 356                                           struct auth_session_info **session_info);
 357
 358 NTSTATUS gensec_magic_check_krb5_oid(struct gensec_security *unused,
 359                                         const DATA_BLOB *blob);
 360
 361 #endif /* __GENSEC_H__ */