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 /* GENSEC mode */
  65 enum gensec_role
  66 {
  67         GENSEC_SERVER,
  68         GENSEC_CLIENT
  69 };
  70
  71 struct auth_session_info;
  72 struct cli_credentials;
  73 struct gensec_settings;
  74 struct tevent_context;
  75 struct tevent_req;
  76 struct smb_krb5_context;
  77
  78 struct gensec_settings {
  79         struct loadparm_context *lp_ctx;
  80         const char *target_hostname;
  81
  82         /* this allows callers to specify a specific set of ops that
  83          * should be used, rather than those loaded by the plugin
  84          * mechanism */
  85         struct gensec_security_ops **backends;
  86 };
  87
  88 struct gensec_security_ops {
  89         const char *name;
  90         const char *sasl_name;
  91         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
  92         const char **oid;  /* NULL if not offered by SPNEGO */
  93         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
  94         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
  95         /**
  96            Determine if a packet has the right 'magic' for this mechanism
  97         */
  98         NTSTATUS (*magic)(struct gensec_security *gensec_security,
  99                           const DATA_BLOB *first_packet);
 100         NTSTATUS (*update)(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 101                            struct tevent_context *ev,
 102                            const DATA_BLOB in, DATA_BLOB *out);
 103         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 104                                 uint8_t *data, size_t length,
 105                                 const uint8_t *whole_pdu, size_t pdu_length,
 106                                 DATA_BLOB *sig);
 107         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 108                                 const uint8_t *data, size_t length,
 109                                 const uint8_t *whole_pdu, size_t pdu_length,
 110                                 DATA_BLOB *sig);
 111         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
 112         size_t   (*max_input_size)(struct gensec_security *gensec_security);
 113         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
 114         NTSTATUS (*check_packet)(struct gensec_security *gensec_security,
 115                                  const uint8_t *data, size_t length,
 116                                  const uint8_t *whole_pdu, size_t pdu_length,
 117                                  const DATA_BLOB *sig);
 118         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security,
 119                                   uint8_t *data, size_t length,
 120                                   const uint8_t *whole_pdu, size_t pdu_length,
 121                                   const DATA_BLOB *sig);
 122         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
 123                                   TALLOC_CTX *mem_ctx,
 124                                   const DATA_BLOB *in,
 125                                   DATA_BLOB *out);
 126         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
 127                            TALLOC_CTX *mem_ctx,
 128                            const DATA_BLOB *in,
 129                            DATA_BLOB *out);
 130         NTSTATUS (*wrap_packets)(struct gensec_security *gensec_security,
 131                                  TALLOC_CTX *mem_ctx,
 132                                  const DATA_BLOB *in,
 133                                  DATA_BLOB *out,
 134                                  size_t *len_processed);
 135         NTSTATUS (*unwrap_packets)(struct gensec_security *gensec_security,
 136                                    TALLOC_CTX *mem_ctx,
 137                                    const DATA_BLOB *in,
 138                                    DATA_BLOB *out,
 139                                    size_t *len_processed);
 140         NTSTATUS (*packet_full_request)(struct gensec_security *gensec_security,
 141                                         DATA_BLOB blob, size_t *size);
 142         NTSTATUS (*session_key)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 143                                 DATA_BLOB *session_key);
 144         NTSTATUS (*session_info)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 145                                  struct auth_session_info **session_info);
 146         void (*want_feature)(struct gensec_security *gensec_security,
 147                                     uint32_t feature);
 148         bool (*have_feature)(struct gensec_security *gensec_security,
 149                                     uint32_t feature);
 150         bool enabled;
 151         bool kerberos;
 152         enum gensec_priority priority;
 153 };
 154
 155 struct gensec_security_ops_wrapper {
 156         const struct gensec_security_ops *op;
 157         const char *oid;
 158 };
 159
 160 #define GENSEC_INTERFACE_VERSION 0
 161
 162 struct gensec_security {
 163         const struct gensec_security_ops *ops;
 164         void *private_data;
 165         struct cli_credentials *credentials;
 166         struct gensec_target target;
 167         enum gensec_role gensec_role;
 168         bool subcontext;
 169         uint32_t want_features;
 170         uint32_t max_update_size;
 171         uint8_t dcerpc_auth_level;
 172         struct tsocket_address *local_addr, *remote_addr;
 173         struct gensec_settings *settings;
 174
 175         /* When we are a server, this may be filled in to provide an
 176          * NTLM authentication backend, and user lookup (such as if no
 177          * PAC is found) */
 178         struct auth4_context *auth_context;
 179 };
 180
 181 /* this structure is used by backends to determine the size of some critical types */
 182 struct gensec_critical_sizes {
 183         int interface_version;
 184         int sizeof_gensec_security_ops;
 185         int sizeof_gensec_security;
 186 };
 187
 188 /* Socket wrapper */
 189
 190 struct gensec_security;
 191 struct socket_context;
 192 struct auth4_context;
 193 struct auth_user_info_dc;
 194
 195 /* These functions are for use here only (public because SPNEGO must
 196  * use them for recursion) */
 197 NTSTATUS gensec_wrap_packets(struct gensec_security *gensec_security,
 198                              TALLOC_CTX *mem_ctx,
 199                              const DATA_BLOB *in,
 200                              DATA_BLOB *out,
 201                              size_t *len_processed);
 202 /* These functions are for use here only (public because SPNEGO must
 203  * use them for recursion) */
 204 NTSTATUS gensec_unwrap_packets(struct gensec_security *gensec_security,
 205                                TALLOC_CTX *mem_ctx,
 206                                const DATA_BLOB *in,
 207                                DATA_BLOB *out,
 208                                size_t *len_processed);
 209
 210 /* These functions are for use here only (public because SPNEGO must
 211  * use them for recursion) */
 212 NTSTATUS gensec_packet_full_request(struct gensec_security *gensec_security,
 213                                     DATA_BLOB blob, size_t *size);
 214
 215 struct loadparm_context;
 216
 217 NTSTATUS gensec_subcontext_start(TALLOC_CTX *mem_ctx,
 218                                  struct gensec_security *parent,
 219                                  struct gensec_security **gensec_security);
 220 NTSTATUS gensec_client_start(TALLOC_CTX *mem_ctx,
 221                              struct gensec_security **gensec_security,
 222                              struct gensec_settings *settings);
 223 NTSTATUS gensec_start_mech_by_ops(struct gensec_security *gensec_security,
 224                                   const struct gensec_security_ops *ops);
 225 NTSTATUS gensec_start_mech_by_sasl_list(struct gensec_security *gensec_security,
 226                                                  const char **sasl_names);
 227 void gensec_set_max_update_size(struct gensec_security *gensec_security,
 228                                 uint32_t max_update_size);
 229 size_t gensec_max_update_size(struct gensec_security *gensec_security);
 230 NTSTATUS gensec_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 231                        struct tevent_context *ev,
 232                        const DATA_BLOB in, DATA_BLOB *out);
 233 struct tevent_req *gensec_update_send(TALLOC_CTX *mem_ctx,
 234                                       struct tevent_context *ev,
 235                                       struct gensec_security *gensec_security,
 236                                       const DATA_BLOB in);
 237 NTSTATUS gensec_update_recv(struct tevent_req *req, TALLOC_CTX *out_mem_ctx, DATA_BLOB *out);
 238 void gensec_want_feature(struct gensec_security *gensec_security,
 239                          uint32_t feature);
 240 bool gensec_have_feature(struct gensec_security *gensec_security,
 241                          uint32_t feature);
 242 NTSTATUS gensec_set_credentials(struct gensec_security *gensec_security, struct cli_credentials *credentials);
 243 NTSTATUS gensec_set_target_service(struct gensec_security *gensec_security, const char *service);
 244 const char *gensec_get_target_service(struct gensec_security *gensec_security);
 245 NTSTATUS gensec_set_target_hostname(struct gensec_security *gensec_security, const char *hostname);
 246 const char *gensec_get_target_hostname(struct gensec_security *gensec_security);
 247 NTSTATUS gensec_session_key(struct gensec_security *gensec_security,
 248                             TALLOC_CTX *mem_ctx,
 249                             DATA_BLOB *session_key);
 250 NTSTATUS gensec_start_mech_by_oid(struct gensec_security *gensec_security,
 251                                   const char *mech_oid);
 252 const char *gensec_get_name_by_oid(struct gensec_security *gensec_security, const char *oid_string);
 253 struct cli_credentials *gensec_get_credentials(struct gensec_security *gensec_security);
 254 NTSTATUS gensec_init(void);
 255 NTSTATUS gensec_register(const struct gensec_security_ops *ops);
 256 const struct gensec_security_ops *gensec_security_by_oid(struct gensec_security *gensec_security,
 257                                                          const char *oid_string);
 258 const struct gensec_security_ops *gensec_security_by_sasl_name(struct gensec_security *gensec_security,
 259                                                                const char *sasl_name);
 260 struct gensec_security_ops **gensec_security_mechs(struct gensec_security *gensec_security,
 261                                                    TALLOC_CTX *mem_ctx);
 262 const struct gensec_security_ops_wrapper *gensec_security_by_oid_list(
 263                                         struct gensec_security *gensec_security,
 264                                         TALLOC_CTX *mem_ctx,
 265                                         const char **oid_strings,
 266                                         const char *skip);
 267 const char **gensec_security_oids(struct gensec_security *gensec_security,
 268                                   TALLOC_CTX *mem_ctx,
 269                                   const char *skip);
 270 const char **gensec_security_oids_from_ops_wrapped(TALLOC_CTX *mem_ctx,
 271                                 const struct gensec_security_ops_wrapper *wops);
 272 size_t gensec_max_input_size(struct gensec_security *gensec_security);
 273 size_t gensec_max_wrapped_size(struct gensec_security *gensec_security);
 274 NTSTATUS gensec_unseal_packet(struct gensec_security *gensec_security,
 275                               uint8_t *data, size_t length,
 276                               const uint8_t *whole_pdu, size_t pdu_length,
 277                               const DATA_BLOB *sig);
 278 NTSTATUS gensec_check_packet(struct gensec_security *gensec_security,
 279                              const uint8_t *data, size_t length,
 280                              const uint8_t *whole_pdu, size_t pdu_length,
 281                              const DATA_BLOB *sig);
 282 size_t gensec_sig_size(struct gensec_security *gensec_security, size_t data_size);
 283 NTSTATUS gensec_seal_packet(struct gensec_security *gensec_security,
 284                             TALLOC_CTX *mem_ctx,
 285                             uint8_t *data, size_t length,
 286                             const uint8_t *whole_pdu, size_t pdu_length,
 287                             DATA_BLOB *sig);
 288 NTSTATUS gensec_sign_packet(struct gensec_security *gensec_security,
 289                             TALLOC_CTX *mem_ctx,
 290                             const uint8_t *data, size_t length,
 291                             const uint8_t *whole_pdu, size_t pdu_length,
 292                             DATA_BLOB *sig);
 293 NTSTATUS gensec_start_mech(struct gensec_security *gensec_security);
 294 NTSTATUS gensec_start_mech_by_authtype(struct gensec_security *gensec_security,
 295                                        uint8_t auth_type, uint8_t auth_level);
 296 const char *gensec_get_name_by_authtype(struct gensec_security *gensec_security, uint8_t authtype);
 297 NTSTATUS gensec_server_start(TALLOC_CTX *mem_ctx,
 298                              struct gensec_settings *settings,
 299                              struct auth4_context *auth_context,
 300                              struct gensec_security **gensec_security);
 301 NTSTATUS gensec_session_info(struct gensec_security *gensec_security,
 302                              TALLOC_CTX *mem_ctx,
 303                              struct auth_session_info **session_info);
 304
 305 NTSTATUS gensec_set_local_address(struct gensec_security *gensec_security,
 306                 const struct tsocket_address *local);
 307 NTSTATUS gensec_set_remote_address(struct gensec_security *gensec_security,
 308                 const struct tsocket_address *remote);
 309 const struct tsocket_address *gensec_get_local_address(struct gensec_security *gensec_security);
 310 const struct tsocket_address *gensec_get_remote_address(struct gensec_security *gensec_security);
 311
 312 NTSTATUS gensec_start_mech_by_name(struct gensec_security *gensec_security,
 313                                         const char *name);
 314
 315 NTSTATUS gensec_unwrap(struct gensec_security *gensec_security,
 316                        TALLOC_CTX *mem_ctx,
 317                        const DATA_BLOB *in,
 318                        DATA_BLOB *out);
 319 NTSTATUS gensec_wrap(struct gensec_security *gensec_security,
 320                      TALLOC_CTX *mem_ctx,
 321                      const DATA_BLOB *in,
 322                      DATA_BLOB *out);
 323
 324 struct gensec_security_ops **gensec_security_all(void);
 325 bool gensec_security_ops_enabled(struct gensec_security_ops *ops, struct gensec_security *security);
 326 struct gensec_security_ops **gensec_use_kerberos_mechs(TALLOC_CTX *mem_ctx,
 327                                                        struct gensec_security_ops **old_gensec_list,
 328                                                        struct cli_credentials *creds);
 329
 330 NTSTATUS gensec_start_mech_by_sasl_name(struct gensec_security *gensec_security,
 331                                         const char *sasl_name);
 332
 333 int gensec_setting_int(struct gensec_settings *settings, const char *mechanism, const char *name, int default_value);
 334 bool gensec_setting_bool(struct gensec_settings *settings, const char *mechanism, const char *name, bool default_value);
 335
 336 NTSTATUS gensec_set_target_principal(struct gensec_security *gensec_security, const char *principal);
 337 const char *gensec_get_target_principal(struct gensec_security *gensec_security);
 338
 339 NTSTATUS gensec_generate_session_info_pac(TALLOC_CTX *mem_ctx,
 340                                           struct gensec_security *gensec_security,
 341                                           struct smb_krb5_context *smb_krb5_context,
 342                                           DATA_BLOB *pac_blob,
 343                                           const char *principal_string,
 344                                           const struct tsocket_address *remote_address,
 345                                           struct auth_session_info **session_info);
 346
 347
 348 #endif /* __GENSEC_H__ */