source4/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_OID_NTLMSSP "1.3.6.1.4.1.311.2.2.10"
  30 #define GENSEC_OID_SPNEGO "1.3.6.1.5.5.2"
  31 #define GENSEC_OID_KERBEROS5 "1.2.840.113554.1.2.2"
  32 #define GENSEC_OID_KERBEROS5_OLD "1.2.840.48018.1.2.2"
  33 #define GENSEC_OID_KERBEROS5_USER2USER "1.2.840.113554.1.2.2.3"
  34
  35 enum gensec_priority {
  36         GENSEC_SPNEGO = 90,
  37         GENSEC_GSSAPI = 80,
  38         GENSEC_KRB5 = 70,
  39         GENSEC_SCHANNEL = 60,
  40         GENSEC_NTLMSSP = 50,
  41         GENSEC_SASL = 20,
  42         GENSEC_OTHER = 0
  43 };
  44
  45 struct gensec_security;
  46 struct gensec_target {
  47         const char *principal;
  48         const char *hostname;
  49         const char *service;
  50 };
  51
  52 #define GENSEC_FEATURE_SESSION_KEY      0x00000001
  53 #define GENSEC_FEATURE_SIGN             0x00000002
  54 #define GENSEC_FEATURE_SEAL             0x00000004
  55 #define GENSEC_FEATURE_DCE_STYLE        0x00000008
  56 #define GENSEC_FEATURE_ASYNC_REPLIES    0x00000010
  57 #define GENSEC_FEATURE_DATAGRAM_MODE    0x00000020
  58 #define GENSEC_FEATURE_SIGN_PKT_HEADER  0x00000040
  59 #define GENSEC_FEATURE_NEW_SPNEGO       0x00000080
  60
  61 /* GENSEC mode */
  62 enum gensec_role
  63 {
  64         GENSEC_SERVER,
  65         GENSEC_CLIENT
  66 };
  67
  68 struct auth_session_info;
  69 struct cli_credentials;
  70 struct gensec_settings;
  71 struct tevent_context;
  72
  73 struct gensec_update_request {
  74         struct gensec_security *gensec_security;
  75         void *private_data;
  76         DATA_BLOB in;
  77         DATA_BLOB out;
  78         NTSTATUS status;
  79         struct {
  80                 void (*fn)(struct gensec_update_request *req, void *private_data);
  81                 void *private_data;
  82         } callback;
  83 };
  84
  85 struct gensec_settings {
  86         struct loadparm_context *lp_ctx;
  87         struct smb_iconv_convenience *iconv_convenience;
  88         const char *target_hostname;
  89 };
  90
  91 struct gensec_security_ops {
  92         const char *name;
  93         const char *sasl_name;
  94         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
  95         const char **oid;  /* NULL if not offered by SPNEGO */
  96         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
  97         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
  98         /**
  99            Determine if a packet has the right 'magic' for this mechanism
 100         */
 101         NTSTATUS (*magic)(struct gensec_security *gensec_security,
 102                           const DATA_BLOB *first_packet);
 103         NTSTATUS (*update)(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 104                            const DATA_BLOB in, DATA_BLOB *out);
 105         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 106                                 uint8_t *data, size_t length,
 107                                 const uint8_t *whole_pdu, size_t pdu_length,
 108                                 DATA_BLOB *sig);
 109         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 110                                 const uint8_t *data, size_t length,
 111                                 const uint8_t *whole_pdu, size_t pdu_length,
 112                                 DATA_BLOB *sig);
 113         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
 114         size_t   (*max_input_size)(struct gensec_security *gensec_security);
 115         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
 116         NTSTATUS (*check_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 117                                  const uint8_t *data, size_t length,
 118                                  const uint8_t *whole_pdu, size_t pdu_length,
 119                                  const DATA_BLOB *sig);
 120         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 121                                   uint8_t *data, size_t length,
 122                                   const uint8_t *whole_pdu, size_t pdu_length,
 123                                   const DATA_BLOB *sig);
 124         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
 125                                   TALLOC_CTX *mem_ctx,
 126                                   const DATA_BLOB *in,
 127                                   DATA_BLOB *out);
 128         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
 129                            TALLOC_CTX *mem_ctx,
 130                            const DATA_BLOB *in,
 131                            DATA_BLOB *out);
 132         NTSTATUS (*wrap_packets)(struct gensec_security *gensec_security,
 133                                  TALLOC_CTX *mem_ctx,
 134                                  const DATA_BLOB *in,
 135                                  DATA_BLOB *out,
 136                                  size_t *len_processed);
 137         NTSTATUS (*unwrap_packets)(struct gensec_security *gensec_security,
 138                                    TALLOC_CTX *mem_ctx,
 139                                    const DATA_BLOB *in,
 140                                    DATA_BLOB *out,
 141                                    size_t *len_processed);
 142         NTSTATUS (*packet_full_request)(struct gensec_security *gensec_security,
 143                                         DATA_BLOB blob, size_t *size);
 144         NTSTATUS (*session_key)(struct gensec_security *gensec_security, DATA_BLOB *session_key);
 145         NTSTATUS (*session_info)(struct gensec_security *gensec_security,
 146                                  struct auth_session_info **session_info);
 147         void (*want_feature)(struct gensec_security *gensec_security,
 148                                     uint32_t feature);
 149         bool (*have_feature)(struct gensec_security *gensec_security,
 150                                     uint32_t feature);
 151         bool enabled;
 152         bool kerberos;
 153         enum gensec_priority priority;
 154 };
 155
 156 struct gensec_security_ops_wrapper {
 157         const struct gensec_security_ops *op;
 158         const char *oid;
 159 };
 160
 161 #define GENSEC_INTERFACE_VERSION 0
 162
 163 struct gensec_security {
 164         const struct gensec_security_ops *ops;
 165         void *private_data;
 166         struct cli_credentials *credentials;
 167         struct gensec_target target;
 168         enum gensec_role gensec_role;
 169         bool subcontext;
 170         uint32_t want_features;
 171         struct tevent_context *event_ctx;
 172         struct socket_address *my_addr, *peer_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 auth_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 auth_context;
 193
 194 NTSTATUS gensec_socket_init(struct gensec_security *gensec_security,
 195                             TALLOC_CTX *mem_ctx,
 196                             struct socket_context *current_socket,
 197                             struct tevent_context *ev,
 198                             void (*recv_handler)(void *, uint16_t),
 199                             void *recv_private,
 200                             struct socket_context **new_socket);
 201 /* These functions are for use here only (public because SPNEGO must
 202  * use them for recursion) */
 203 NTSTATUS gensec_wrap_packets(struct gensec_security *gensec_security,
 204                              TALLOC_CTX *mem_ctx,
 205                              const DATA_BLOB *in,
 206                              DATA_BLOB *out,
 207                              size_t *len_processed);
 208 /* These functions are for use here only (public because SPNEGO must
 209  * use them for recursion) */
 210 NTSTATUS gensec_unwrap_packets(struct gensec_security *gensec_security,
 211                                TALLOC_CTX *mem_ctx,
 212                                const DATA_BLOB *in,
 213                                DATA_BLOB *out,
 214                                size_t *len_processed);
 215
 216 /* These functions are for use here only (public because SPNEGO must
 217  * use them for recursion) */
 218 NTSTATUS gensec_packet_full_request(struct gensec_security *gensec_security,
 219                                     DATA_BLOB blob, size_t *size);
 220
 221 struct loadparm_context;
 222
 223 NTSTATUS gensec_subcontext_start(TALLOC_CTX *mem_ctx,
 224                                  struct gensec_security *parent,
 225                                  struct gensec_security **gensec_security);
 226 NTSTATUS gensec_client_start(TALLOC_CTX *mem_ctx,
 227                              struct gensec_security **gensec_security,
 228                              struct tevent_context *ev,
 229                              struct gensec_settings *settings);
 230 NTSTATUS gensec_start_mech_by_sasl_list(struct gensec_security *gensec_security,
 231                                                  const char **sasl_names);
 232 NTSTATUS gensec_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 233                        const DATA_BLOB in, DATA_BLOB *out);
 234 void gensec_update_send(struct gensec_security *gensec_security, const DATA_BLOB in,
 235                                  void (*callback)(struct gensec_update_request *req, void *private_data),
 236                                  void *private_data);
 237 NTSTATUS gensec_update_recv(struct gensec_update_request *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                             DATA_BLOB *session_key);
 249 NTSTATUS gensec_start_mech_by_oid(struct gensec_security *gensec_security,
 250                                   const char *mech_oid);
 251 const char *gensec_get_name_by_oid(struct gensec_security *gensec_security, const char *oid_string);
 252 struct cli_credentials *gensec_get_credentials(struct gensec_security *gensec_security);
 253 struct socket_address *gensec_get_peer_addr(struct gensec_security *gensec_security);
 254 NTSTATUS gensec_init(struct loadparm_context *lp_ctx);
 255 NTSTATUS gensec_unseal_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                               const DATA_BLOB *sig);
 260 NTSTATUS gensec_check_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                              const DATA_BLOB *sig);
 265 size_t gensec_sig_size(struct gensec_security *gensec_security, size_t data_size);
 266 NTSTATUS gensec_seal_packet(struct gensec_security *gensec_security,
 267                             TALLOC_CTX *mem_ctx,
 268                             uint8_t *data, size_t length,
 269                             const uint8_t *whole_pdu, size_t pdu_length,
 270                             DATA_BLOB *sig);
 271 NTSTATUS gensec_sign_packet(struct gensec_security *gensec_security,
 272                             TALLOC_CTX *mem_ctx,
 273                             const uint8_t *data, size_t length,
 274                             const uint8_t *whole_pdu, size_t pdu_length,
 275                             DATA_BLOB *sig);
 276 NTSTATUS gensec_start_mech_by_authtype(struct gensec_security *gensec_security,
 277                                        uint8_t auth_type, uint8_t auth_level);
 278 const char *gensec_get_name_by_authtype(struct gensec_security *gensec_security, uint8_t authtype);
 279 NTSTATUS gensec_server_start(TALLOC_CTX *mem_ctx,
 280                              struct tevent_context *ev,
 281                              struct gensec_settings *settings,
 282                              struct auth_context *auth_context,
 283                              struct gensec_security **gensec_security);
 284 NTSTATUS gensec_session_info(struct gensec_security *gensec_security,
 285                              struct auth_session_info **session_info);
 286 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status);
 287 struct creds_CredentialState;
 288 NTSTATUS dcerpc_schannel_creds(struct gensec_security *gensec_security,
 289                                TALLOC_CTX *mem_ctx,
 290                                struct creds_CredentialState **creds);
 291 NTSTATUS gensec_set_peer_addr(struct gensec_security *gensec_security, struct socket_address *peer_addr);
 292 NTSTATUS gensec_set_my_addr(struct gensec_security *gensec_security, struct socket_address *my_addr);
 293
 294 NTSTATUS gensec_start_mech_by_name(struct gensec_security *gensec_security,
 295                                         const char *name);
 296
 297 NTSTATUS gensec_unwrap(struct gensec_security *gensec_security,
 298                        TALLOC_CTX *mem_ctx,
 299                        const DATA_BLOB *in,
 300                        DATA_BLOB *out);
 301 NTSTATUS gensec_wrap(struct gensec_security *gensec_security,
 302                      TALLOC_CTX *mem_ctx,
 303                      const DATA_BLOB *in,
 304                      DATA_BLOB *out);
 305
 306 struct gensec_security_ops **gensec_security_all(void);
 307 bool gensec_security_ops_enabled(struct gensec_security_ops *ops, struct loadparm_context *lp_ctx);
 308 struct gensec_security_ops **gensec_use_kerberos_mechs(TALLOC_CTX *mem_ctx,
 309                                                        struct gensec_security_ops **old_gensec_list,
 310                                                        struct cli_credentials *creds);
 311
 312 NTSTATUS gensec_start_mech_by_sasl_name(struct gensec_security *gensec_security,
 313                                         const char *sasl_name);
 314
 315 int gensec_setting_int(struct gensec_settings *settings, const char *mechanism, const char *name, int default_value);
 316 bool gensec_setting_bool(struct gensec_settings *settings, const char *mechanism, const char *name, bool default_value);
 317
 318 #endif /* __GENSEC_H__ */