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