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         uint8_t auth_type;  /* 0 if not offered on DCE-RPC */
  32         const char **oid;  /* NULL if not offered by SPNEGO */
  33         NTSTATUS (*client_start)(struct gensec_security *gensec_security);
  34         NTSTATUS (*server_start)(struct gensec_security *gensec_security);
  35         /**
  36            Determine if a packet has the right 'magic' for this mechanism
  37         */
  38         NTSTATUS (*magic)(struct gensec_security *gensec_security,
  39                           const DATA_BLOB *first_packet);
  40         NTSTATUS (*update)(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
  41                            struct tevent_context *ev,
  42                            const DATA_BLOB in, DATA_BLOB *out);
  43         NTSTATUS (*seal_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  44                                 uint8_t *data, size_t length,
  45                                 const uint8_t *whole_pdu, size_t pdu_length,
  46                                 DATA_BLOB *sig);
  47         NTSTATUS (*sign_packet)(struct gensec_security *gensec_security, TALLOC_CTX *sig_mem_ctx,
  48                                 const uint8_t *data, size_t length,
  49                                 const uint8_t *whole_pdu, size_t pdu_length,
  50                                 DATA_BLOB *sig);
  51         size_t   (*sig_size)(struct gensec_security *gensec_security, size_t data_size);
  52         size_t   (*max_input_size)(struct gensec_security *gensec_security);
  53         size_t   (*max_wrapped_size)(struct gensec_security *gensec_security);
  54         NTSTATUS (*check_packet)(struct gensec_security *gensec_security,
  55                                  const uint8_t *data, size_t length,
  56                                  const uint8_t *whole_pdu, size_t pdu_length,
  57                                  const DATA_BLOB *sig);
  58         NTSTATUS (*unseal_packet)(struct gensec_security *gensec_security,
  59                                   uint8_t *data, size_t length,
  60                                   const uint8_t *whole_pdu, size_t pdu_length,
  61                                   const DATA_BLOB *sig);
  62         NTSTATUS (*wrap)(struct gensec_security *gensec_security,
  63                                   TALLOC_CTX *mem_ctx,
  64                                   const DATA_BLOB *in,
  65                                   DATA_BLOB *out);
  66         NTSTATUS (*unwrap)(struct gensec_security *gensec_security,
  67                            TALLOC_CTX *mem_ctx,
  68                            const DATA_BLOB *in,
  69                            DATA_BLOB *out);
  70         NTSTATUS (*wrap_packets)(struct gensec_security *gensec_security,
  71                                  TALLOC_CTX *mem_ctx,
  72                                  const DATA_BLOB *in,
  73                                  DATA_BLOB *out,
  74                                  size_t *len_processed);
  75         NTSTATUS (*unwrap_packets)(struct gensec_security *gensec_security,
  76                                    TALLOC_CTX *mem_ctx,
  77                                    const DATA_BLOB *in,
  78                                    DATA_BLOB *out,
  79                                    size_t *len_processed);
  80         NTSTATUS (*packet_full_request)(struct gensec_security *gensec_security,
  81                                         DATA_BLOB blob, size_t *size);
  82         NTSTATUS (*session_key)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
  83                                 DATA_BLOB *session_key);
  84         NTSTATUS (*session_info)(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
  85                                  struct auth_session_info **session_info);
  86         void (*want_feature)(struct gensec_security *gensec_security,
  87                                     uint32_t feature);
  88         bool (*have_feature)(struct gensec_security *gensec_security,
  89                                     uint32_t feature);
  90         NTTIME (*expire_time)(struct gensec_security *gensec_security);
  91         bool enabled;
  92         bool kerberos;
  93         enum gensec_priority priority;
  94 };
  95
  96 struct gensec_security_ops_wrapper {
  97         const struct gensec_security_ops *op;
  98         const char *oid;
  99 };
 100
 101 struct gensec_security {
 102         const struct gensec_security_ops *ops;
 103         void *private_data;
 104         struct cli_credentials *credentials;
 105         struct gensec_target target;
 106         enum gensec_role gensec_role;
 107         bool subcontext;
 108         uint32_t want_features;
 109         uint32_t max_update_size;
 110         uint8_t dcerpc_auth_level;
 111         struct tsocket_address *local_addr, *remote_addr;
 112         struct gensec_settings *settings;
 113
 114         /* When we are a server, this may be filled in to provide an
 115          * NTLM authentication backend, and user lookup (such as if no
 116          * PAC is found) */
 117         struct auth4_context *auth_context;
 118 };
 119
 120 /* this structure is used by backends to determine the size of some critical types */
 121 struct gensec_critical_sizes {
 122         int interface_version;
 123         int sizeof_gensec_security_ops;
 124         int sizeof_gensec_security;
 125 };
 126
 127 #endif /* __GENSEC_H__ */