auth/gensec/gensec_internal.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_INTERNAL_H__
  24 #define __GENSEC_INTERNAL_H__
  25
  26 struct gensec_security;
  27
  28 struct gensec_security_ops {
  29         const char *name;
  30         const char *sasl_name;
  31         bool weak_crypto;
  32         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
  33         const char **oid;  /* NULL if not offered by SPNEGO */
  34         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
  35         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
  36         /**
  37            Determine if a packet has the right 'magic' for this mechanism
  38         */
  39         NTSTATUS (*magic)(struct gensec_security *gensec_security,
  40                           const DATA_BLOB *first_packet);
  41         struct tevent_req *(*update_send)(TALLOC_CTX *mem_ctx,
  42                                           struct tevent_context *ev,
  43                                           struct gensec_security *gensec_security,
  44                                           const DATA_BLOB in);
  45         NTSTATUS (*update_recv)(struct tevent_req *req,
  46                                 TALLOC_CTX *out_mem_ctx,
  47                                 DATA_BLOB *out);
  48         NTSTATUS (*may_reset_crypto)(struct gensec_security *gensec_security,
  49                                      bool full_reset);
  50         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  51                                 uint8_t *data, size_t length,
  52                                 const uint8_t *whole_pdu, size_t pdu_length,
  53                                 DATA_BLOB *sig);
  54         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  55                                 const uint8_t *data, size_t length,
  56                                 const uint8_t *whole_pdu, size_t pdu_length,
  57                                 DATA_BLOB *sig);
  58         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
  59         size_t   (*max_input_size)(struct gensec_security *gensec_security);
  60         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
  61         NTSTATUS (*check_packet)(struct gensec_security *gensec_security,
  62                                  const uint8_t *data, size_t length,
  63                                  const uint8_t *whole_pdu, size_t pdu_length,
  64                                  const DATA_BLOB *sig);
  65         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security,
  66                                   uint8_t *data, size_t length,
  67                                   const uint8_t *whole_pdu, size_t pdu_length,
  68                                   const DATA_BLOB *sig);
  69         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
  70                                   TALLOC_CTX *mem_ctx,
  71                                   const DATA_BLOB *in,
  72                                   DATA_BLOB *out);
  73         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
  74                            TALLOC_CTX *mem_ctx,
  75                            const DATA_BLOB *in,
  76                            DATA_BLOB *out);
  77         NTSTATUS (*session_key)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
  78                                 DATA_BLOB *session_key);
  79         NTSTATUS (*session_info)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
  80                                  struct auth_session_info **session_info);
  81         void (*want_feature)(struct gensec_security *gensec_security,
  82                                     uint32_t feature);
  83         bool (*have_feature)(struct gensec_security *gensec_security,
  84                                     uint32_t feature);
  85         NTTIME (*expire_time)(struct gensec_security *gensec_security);
  86         const char *(*final_auth_type)(struct gensec_security *gensec_security);
  87         bool enabled;
  88         bool kerberos;
  89         enum gensec_priority priority;
  90         bool glue;
  91 };
  92
  93 struct gensec_security_ops_wrapper {
  94         const struct gensec_security_ops *op;
  95         const char *oid;
  96 };
  97
  98 /*
  99  * typedef struct gss_channel_bindings_struct {
 100  *       OM_uint32 initiator_addrtype;
 101  *       gss_buffer_desc initiator_address;
 102  *       OM_uint32 acceptor_addrtype;
 103  *       gss_buffer_desc acceptor_address;
 104  *       gss_buffer_desc application_data;
 105  * } *gss_channel_bindings_t;
 106  */
 107 struct gensec_channel_bindings {
 108         uint32_t initiator_addrtype;
 109         DATA_BLOB initiator_address;
 110         uint32_t acceptor_addrtype;
 111         DATA_BLOB acceptor_address;
 112         DATA_BLOB application_data;
 113 };
 114
 115 struct gensec_security {
 116         const struct gensec_security_ops *ops;
 117         void *private_data;
 118         struct cli_credentials *credentials;
 119         struct gensec_target target;
 120         enum gensec_role gensec_role;
 121         bool subcontext;
 122         uint32_t want_features;
 123         uint32_t max_update_size;
 124         uint8_t dcerpc_auth_level;
 125         struct tsocket_address *local_addr, *remote_addr;
 126         struct gensec_channel_bindings *channel_bindings;
 127         struct gensec_settings *settings;
 128
 129         /* When we are a server, this may be filled in to provide an
 130          * NTLM authentication backend, and user lookup (such as if no
 131          * PAC is found) */
 132         struct auth4_context *auth_context;
 133
 134         struct gensec_security *parent_security;
 135         struct gensec_security *child_security;
 136
 137         /*
 138          * This is used to mark the context as being
 139          * busy in an async gensec_update_send().
 140          */
 141         struct gensec_security **update_busy_ptr;
 142 };
 143
 144 /* this structure is used by backends to determine the size of some critical types */
 145 struct gensec_critical_sizes {
 146         int interface_version;
 147         int sizeof_gensec_security_ops;
 148         int sizeof_gensec_security;
 149 };
 150
 151 NTSTATUS gensec_may_reset_crypto(struct gensec_security *gensec_security,
 152                                  bool full_reset);
 153
 154 const char *gensec_final_auth_type(struct gensec_security *gensec_security);
 155
 156 NTSTATUS gensec_child_ready(struct gensec_security *parent,
 157                             struct gensec_security *child);
 158 void gensec_child_want_feature(struct gensec_security *gensec_security,
 159                                uint32_t feature);
 160 bool gensec_child_have_feature(struct gensec_security *gensec_security,
 161                                uint32_t feature);
 162 NTSTATUS gensec_child_unseal_packet(struct gensec_security *gensec_security,
 163                                     uint8_t *data, size_t length,
 164                                     const uint8_t *whole_pdu, size_t pdu_length,
 165                                     const DATA_BLOB *sig);
 166 NTSTATUS gensec_child_check_packet(struct gensec_security *gensec_security,
 167                                    const uint8_t *data, size_t length,
 168                                    const uint8_t *whole_pdu, size_t pdu_length,
 169                                    const DATA_BLOB *sig);
 170 NTSTATUS gensec_child_seal_packet(struct gensec_security *gensec_security,
 171                                   TALLOC_CTX *mem_ctx,
 172                                   uint8_t *data, size_t length,
 173                                   const uint8_t *whole_pdu, size_t pdu_length,
 174                                   DATA_BLOB *sig);
 175 NTSTATUS gensec_child_sign_packet(struct gensec_security *gensec_security,
 176                                   TALLOC_CTX *mem_ctx,
 177                                   const uint8_t *data, size_t length,
 178                                   const uint8_t *whole_pdu, size_t pdu_length,
 179                                   DATA_BLOB *sig);
 180 NTSTATUS gensec_child_wrap(struct gensec_security *gensec_security,
 181                            TALLOC_CTX *mem_ctx,
 182                            const DATA_BLOB *in,
 183                            DATA_BLOB *out);
 184 NTSTATUS gensec_child_unwrap(struct gensec_security *gensec_security,
 185                              TALLOC_CTX *mem_ctx,
 186                              const DATA_BLOB *in,
 187                              DATA_BLOB *out);
 188 size_t gensec_child_sig_size(struct gensec_security *gensec_security,
 189                              size_t data_size);
 190 size_t gensec_child_max_input_size(struct gensec_security *gensec_security);
 191 size_t gensec_child_max_wrapped_size(struct gensec_security *gensec_security);
 192 NTSTATUS gensec_child_session_key(struct gensec_security *gensec_security,
 193                                   TALLOC_CTX *mem_ctx,
 194                                   DATA_BLOB *session_key);
 195 NTSTATUS gensec_child_session_info(struct gensec_security *gensec_security,
 196                                    TALLOC_CTX *mem_ctx,
 197                                    struct auth_session_info **session_info);
 198 NTTIME gensec_child_expire_time(struct gensec_security *gensec_security);
 199 const char *gensec_child_final_auth_type(struct gensec_security *gensec_security);
 200
 201 char *gensec_get_unparsed_target_principal(struct gensec_security *gensec_security,
 202                                            TALLOC_CTX *mem_ctx);
 203 NTSTATUS gensec_kerberos_possible(struct gensec_security *gensec_security);
 204
 205 #endif /* __GENSEC_H__ */