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 #define GENSEC_OID_NTLMSSP "1.3.6.1.4.1.311.2.2.10"
  27 #define GENSEC_OID_SPNEGO "1.3.6.1.5.5.2"
  28 #define GENSEC_OID_KERBEROS5 "1.2.840.113554.1.2.2"
  29 #define GENSEC_OID_KERBEROS5_OLD "1.2.840.48018.1.2.2"
  30 #define GENSEC_OID_KERBEROS5_USER2USER "1.2.840.113554.1.2.2.3"
  31
  32 enum gensec_priority {
  33         GENSEC_SPNEGO = 90,
  34         GENSEC_GSSAPI = 80,
  35         GENSEC_KRB5 = 70,
  36         GENSEC_SCHANNEL = 60,
  37         GENSEC_NTLMSSP = 50,
  38         GENSEC_SASL = 20,
  39         GENSEC_OTHER = 0
  40 };
  41
  42 struct gensec_security;
  43 struct gensec_target {
  44         const char *principal;
  45         const char *hostname;
  46         const char *service;
  47 };
  48
  49 #define GENSEC_FEATURE_SESSION_KEY      0x00000001
  50 #define GENSEC_FEATURE_SIGN             0x00000002
  51 #define GENSEC_FEATURE_SEAL             0x00000004
  52 #define GENSEC_FEATURE_DCE_STYLE        0x00000008
  53 #define GENSEC_FEATURE_ASYNC_REPLIES    0x00000010
  54 #define GENSEC_FEATURE_DATAGRAM_MODE    0x00000020
  55 #define GENSEC_FEATURE_SIGN_PKT_HEADER  0x00000040
  56 #define GENSEC_FEATURE_NEW_SPNEGO       0x00000080
  57
  58 /* GENSEC mode */
  59 enum gensec_role
  60 {
  61         GENSEC_SERVER,
  62         GENSEC_CLIENT
  63 };
  64
  65 struct auth_session_info;
  66 struct cli_credentials;
  67
  68 struct gensec_update_request {
  69         struct gensec_security *gensec_security;
  70         void *private_data;
  71         DATA_BLOB in;
  72         DATA_BLOB out;
  73         NTSTATUS status;
  74         struct {
  75                 void (*fn)(struct gensec_update_request *req, void *private_data);
  76                 void *private_data;
  77         } callback;
  78 };
  79
  80 struct gensec_security_ops {
  81         const char *name;
  82         const char *sasl_name;
  83         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
  84         const char **oid;  /* NULL if not offered by SPNEGO */
  85         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
  86         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
  87         /**
  88            Determine if a packet has the right 'magic' for this mechanism
  89         */
  90         NTSTATUS (*magic)(struct gensec_security *gensec_security,
  91                           const DATA_BLOB *first_packet);
  92         NTSTATUS (*update)(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
  93                            const DATA_BLOB in, DATA_BLOB *out);
  94         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  95                                 uint8_t *data, size_t length,
  96                                 const uint8_t *whole_pdu, size_t pdu_length,
  97                                 DATA_BLOB *sig);
  98         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  99                                 const uint8_t *data, size_t length,
 100                                 const uint8_t *whole_pdu, size_t pdu_length,
 101                                 DATA_BLOB *sig);
 102         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
 103         size_t   (*max_input_size)(struct gensec_security *gensec_security);
 104         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
 105         NTSTATUS (*check_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 106                                  const uint8_t *data, size_t length,
 107                                  const uint8_t *whole_pdu, size_t pdu_length,
 108                                  const DATA_BLOB *sig);
 109         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
 110                                   uint8_t *data, size_t length,
 111                                   const uint8_t *whole_pdu, size_t pdu_length,
 112                                   const DATA_BLOB *sig);
 113         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
 114                                   TALLOC_CTX *mem_ctx,
 115                                   const DATA_BLOB *in,
 116                                   DATA_BLOB *out);
 117         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
 118                            TALLOC_CTX *mem_ctx,
 119                            const DATA_BLOB *in,
 120                            DATA_BLOB *out);
 121         NTSTATUS (*wrap_packets)(struct gensec_security *gensec_security,
 122                                  TALLOC_CTX *mem_ctx,
 123                                  const DATA_BLOB *in,
 124                                  DATA_BLOB *out,
 125                                  size_t *len_processed);
 126         NTSTATUS (*unwrap_packets)(struct gensec_security *gensec_security,
 127                                    TALLOC_CTX *mem_ctx,
 128                                    const DATA_BLOB *in,
 129                                    DATA_BLOB *out,
 130                                    size_t *len_processed);
 131         NTSTATUS (*packet_full_request)(struct gensec_security *gensec_security,
 132                                         DATA_BLOB blob, size_t *size);
 133         NTSTATUS (*session_key)(struct gensec_security *gensec_security, DATA_BLOB *session_key);
 134         NTSTATUS (*session_info)(struct gensec_security *gensec_security,
 135                                  struct auth_session_info **session_info);
 136         void (*want_feature)(struct gensec_security *gensec_security,
 137                                     uint32_t feature);
 138         bool (*have_feature)(struct gensec_security *gensec_security,
 139                                     uint32_t feature);
 140         bool enabled;
 141         bool kerberos;
 142         enum gensec_priority priority;
 143 };
 144
 145 struct gensec_security_ops_wrapper {
 146         const struct gensec_security_ops *op;
 147         const char *oid;
 148 };
 149
 150 #define GENSEC_INTERFACE_VERSION 0
 151
 152 struct gensec_security {
 153         const struct gensec_security_ops *ops;
 154         struct loadparm_context *lp_ctx;
 155         void *private_data;
 156         struct cli_credentials *credentials;
 157         struct gensec_target target;
 158         enum gensec_role gensec_role;
 159         bool subcontext;
 160         uint32_t want_features;
 161         struct event_context *event_ctx;
 162         struct messaging_context *msg_ctx; /* only valid as server */
 163         struct socket_address *my_addr, *peer_addr;
 164 };
 165
 166 /* this structure is used by backends to determine the size of some critical types */
 167 struct gensec_critical_sizes {
 168         int interface_version;
 169         int sizeof_gensec_security_ops;
 170         int sizeof_gensec_security;
 171 };
 172
 173 /* Socket wrapper */
 174
 175 struct gensec_security;
 176 struct socket_context;
 177
 178 NTSTATUS gensec_socket_init(struct gensec_security *gensec_security,
 179                             TALLOC_CTX *mem_ctx,
 180                             struct socket_context *current_socket,
 181                             struct event_context *ev,
 182                             void (*recv_handler)(void *, uint16_t),
 183                             void *recv_private,
 184                             struct socket_context **new_socket);
 185 /* These functions are for use here only (public because SPNEGO must
 186  * use them for recursion) */
 187 NTSTATUS gensec_wrap_packets(struct gensec_security *gensec_security,
 188                              TALLOC_CTX *mem_ctx,
 189                              const DATA_BLOB *in,
 190                              DATA_BLOB *out,
 191                              size_t *len_processed);
 192 /* These functions are for use here only (public because SPNEGO must
 193  * use them for recursion) */
 194 NTSTATUS gensec_unwrap_packets(struct gensec_security *gensec_security,
 195                                TALLOC_CTX *mem_ctx,
 196                                const DATA_BLOB *in,
 197                                DATA_BLOB *out,
 198                                size_t *len_processed);
 199
 200 /* These functions are for use here only (public because SPNEGO must
 201  * use them for recursion) */
 202 NTSTATUS gensec_packet_full_request(struct gensec_security *gensec_security,
 203                                     DATA_BLOB blob, size_t *size);
 204
 205 struct loadparm_context;
 206
 207 NTSTATUS gensec_subcontext_start(TALLOC_CTX *mem_ctx,
 208                                  struct gensec_security *parent,
 209                                  struct gensec_security **gensec_security);
 210 NTSTATUS gensec_client_start(TALLOC_CTX *mem_ctx,
 211                              struct gensec_security **gensec_security,
 212                              struct event_context *ev,
 213                              struct loadparm_context *lp_ctx);
 214 NTSTATUS gensec_start_mech_by_sasl_list(struct gensec_security *gensec_security,
 215                                                  const char **sasl_names);
 216 NTSTATUS gensec_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 217                        const DATA_BLOB in, DATA_BLOB *out);
 218 void gensec_update_send(struct gensec_security *gensec_security, const DATA_BLOB in,
 219                                  void (*callback)(struct gensec_update_request *req, void *private_data),
 220                                  void *private_data);
 221 NTSTATUS gensec_update_recv(struct gensec_update_request *req, TALLOC_CTX *out_mem_ctx, DATA_BLOB *out);
 222 void gensec_want_feature(struct gensec_security *gensec_security,
 223                          uint32_t feature);
 224 bool gensec_have_feature(struct gensec_security *gensec_security,
 225                          uint32_t feature);
 226 NTSTATUS gensec_set_credentials(struct gensec_security *gensec_security, struct cli_credentials *credentials);
 227 NTSTATUS gensec_set_target_service(struct gensec_security *gensec_security, const char *service);
 228 const char *gensec_get_target_service(struct gensec_security *gensec_security);
 229 NTSTATUS gensec_set_target_hostname(struct gensec_security *gensec_security, const char *hostname);
 230 const char *gensec_get_target_hostname(struct gensec_security *gensec_security);
 231 NTSTATUS gensec_session_key(struct gensec_security *gensec_security,
 232                             DATA_BLOB *session_key);
 233 NTSTATUS gensec_start_mech_by_oid(struct gensec_security *gensec_security,
 234                                   const char *mech_oid);
 235 const char *gensec_get_name_by_oid(const char *oid_string);
 236 struct cli_credentials *gensec_get_credentials(struct gensec_security *gensec_security);
 237 struct socket_address *gensec_get_peer_addr(struct gensec_security *gensec_security);
 238 NTSTATUS gensec_init(struct loadparm_context *lp_ctx);
 239 NTSTATUS gensec_unseal_packet(struct gensec_security *gensec_security,
 240                               TALLOC_CTX *mem_ctx,
 241                               uint8_t *data, size_t length,
 242                               const uint8_t *whole_pdu, size_t pdu_length,
 243                               const DATA_BLOB *sig);
 244 NTSTATUS gensec_check_packet(struct gensec_security *gensec_security,
 245                              TALLOC_CTX *mem_ctx,
 246                              const uint8_t *data, size_t length,
 247                              const uint8_t *whole_pdu, size_t pdu_length,
 248                              const DATA_BLOB *sig);
 249 size_t gensec_sig_size(struct gensec_security *gensec_security, size_t data_size);
 250 NTSTATUS gensec_seal_packet(struct gensec_security *gensec_security,
 251                             TALLOC_CTX *mem_ctx,
 252                             uint8_t *data, size_t length,
 253                             const uint8_t *whole_pdu, size_t pdu_length,
 254                             DATA_BLOB *sig);
 255 NTSTATUS gensec_sign_packet(struct gensec_security *gensec_security,
 256                             TALLOC_CTX *mem_ctx,
 257                             const uint8_t *data, size_t length,
 258                             const uint8_t *whole_pdu, size_t pdu_length,
 259                             DATA_BLOB *sig);
 260 NTSTATUS gensec_start_mech_by_authtype(struct gensec_security *gensec_security,
 261                                        uint8_t auth_type, uint8_t auth_level);
 262 const char *gensec_get_name_by_authtype(uint8_t authtype);
 263 NTSTATUS gensec_server_start(TALLOC_CTX *mem_ctx,
 264                              struct event_context *ev,
 265                              struct loadparm_context *lp_ctx,
 266                              struct messaging_context *msg,
 267                              struct gensec_security **gensec_security);
 268 NTSTATUS gensec_session_info(struct gensec_security *gensec_security,
 269                              struct auth_session_info **session_info);
 270 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status);
 271 struct creds_CredentialState;
 272 NTSTATUS dcerpc_schannel_creds(struct gensec_security *gensec_security,
 273                                TALLOC_CTX *mem_ctx,
 274                                struct creds_CredentialState **creds);
 275 NTSTATUS gensec_set_peer_addr(struct gensec_security *gensec_security, struct socket_address *peer_addr);
 276 NTSTATUS gensec_set_my_addr(struct gensec_security *gensec_security, struct socket_address *my_addr);
 277
 278 NTSTATUS gensec_start_mech_by_name(struct gensec_security *gensec_security,
 279                                         const char *name);
 280
 281 NTSTATUS gensec_unwrap(struct gensec_security *gensec_security,
 282                        TALLOC_CTX *mem_ctx,
 283                        const DATA_BLOB *in,
 284                        DATA_BLOB *out);
 285 NTSTATUS gensec_wrap(struct gensec_security *gensec_security,
 286                      TALLOC_CTX *mem_ctx,
 287                      const DATA_BLOB *in,
 288                      DATA_BLOB *out);
 289
 290 struct gensec_security_ops **gensec_security_all(void);
 291 struct gensec_security_ops **gensec_use_kerberos_mechs(TALLOC_CTX *mem_ctx,
 292                                                        struct gensec_security_ops **old_gensec_list,
 293                                                        struct cli_credentials *creds);
 294
 295 NTSTATUS gensec_start_mech_by_sasl_name(struct gensec_security *gensec_security,
 296                                         const char *sasl_name);
 297
 298
 299 #endif /* __GENSEC_H__ */