source4/auth/samba_server_gensec.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Generic Authentication Interface for Samba Servers
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /* This code sets up GENSEC in the way that all Samba servers want
  23  * (becaue they have presumed access to the sam.ldb etc */
  24
  25 #include "includes.h"
  26 #include "auth/auth.h"
  27 #include "auth/gensec/gensec.h"
  28 #include "param/param.h"
  29
  30 static NTSTATUS samba_server_gensec_start_settings(TALLOC_CTX *mem_ctx,
  31                                    struct tevent_context *event_ctx,
  32                                    struct imessaging_context *msg_ctx,
  33                                    struct loadparm_context *lp_ctx,
  34                                    struct gensec_settings *settings,
  35                                    struct cli_credentials *server_credentials,
  36                                    const char *target_service,
  37                                    struct gensec_security **gensec_context)
  38 {
  39         NTSTATUS nt_status;
  40         struct gensec_security *gensec_ctx;
  41         struct auth4_context *auth_context;
  42
  43         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
  44         if (!tmp_ctx) {
  45                 return NT_STATUS_NO_MEMORY;
  46         }
  47
  48         nt_status = auth_context_create(tmp_ctx,
  49                                         event_ctx,
  50                                         msg_ctx,
  51                                         lp_ctx,
  52                                         &auth_context);
  53
  54         if (!NT_STATUS_IS_OK(nt_status)) {
  55                 DEBUG(1, ("Failed to start auth server code: %s\n", nt_errstr(nt_status)));
  56                 talloc_free(tmp_ctx);
  57                 return nt_status;
  58         }
  59
  60         nt_status = gensec_server_start(tmp_ctx,
  61                                         settings,
  62                                         auth_context,
  63                                         &gensec_ctx);
  64         if (!NT_STATUS_IS_OK(nt_status)) {
  65                 talloc_free(tmp_ctx);
  66                 DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(nt_status)));
  67                 return nt_status;
  68         }
  69
  70         gensec_set_credentials(gensec_ctx, server_credentials);
  71
  72         if (target_service) {
  73                 gensec_set_target_service(gensec_ctx, target_service);
  74         }
  75         *gensec_context = talloc_steal(mem_ctx, gensec_ctx);
  76         talloc_free(tmp_ctx);
  77         return nt_status;
  78 }
  79
  80 NTSTATUS samba_server_gensec_start(TALLOC_CTX *mem_ctx,
  81                                    struct tevent_context *event_ctx,
  82                                    struct imessaging_context *msg_ctx,
  83                                    struct loadparm_context *lp_ctx,
  84                                    struct cli_credentials *server_credentials,
  85                                    const char *target_service,
  86                                    struct gensec_security **gensec_context)
  87 {
  88         struct gensec_settings *settings = NULL;
  89         NTSTATUS status;
  90
  91         settings = lpcfg_gensec_settings(mem_ctx, lp_ctx);
  92         if (settings == NULL) {
  93                 return NT_STATUS_NO_MEMORY;
  94         }
  95         status = samba_server_gensec_start_settings(mem_ctx, event_ctx,
  96                                                     msg_ctx, lp_ctx,
  97                                                     settings, server_credentials,
  98                                                     target_service,
  99                                                     gensec_context);
 100         if (!NT_STATUS_IS_OK(status)) {
 101                 TALLOC_FREE(settings);
 102                 return status;
 103         }
 104
 105         talloc_reparent(mem_ctx, *gensec_context, settings);
 106         return NT_STATUS_OK;
 107 }
 108
 109 NTSTATUS samba_server_gensec_krb5_start(TALLOC_CTX *mem_ctx,
 110                                         struct tevent_context *event_ctx,
 111                                         struct imessaging_context *msg_ctx,
 112                                         struct loadparm_context *lp_ctx,
 113                                         struct cli_credentials *server_credentials,
 114                                         const char *target_service,
 115                                         struct gensec_security **gensec_context)
 116 {
 117         struct gensec_settings *settings = NULL;
 118         const struct gensec_security_ops **backends = NULL;
 119         size_t idx = 0;
 120         NTSTATUS status;
 121
 122         settings = lpcfg_gensec_settings(mem_ctx, lp_ctx);
 123         if (settings == NULL) {
 124                 return NT_STATUS_NO_MEMORY;
 125         }
 126         backends = talloc_zero_array(settings,
 127                                      const struct gensec_security_ops *, 3);
 128         if (backends == NULL) {
 129                         TALLOC_FREE(settings);
 130                 return NT_STATUS_NO_MEMORY;
 131         }
 132         settings->backends = backends;
 133
 134         gensec_init();
 135
 136         backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_KERBEROS5);
 137
 138         backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_SPNEGO);
 139
 140         status = samba_server_gensec_start_settings(mem_ctx, event_ctx,
 141                                                     msg_ctx, lp_ctx,
 142                                                     settings, server_credentials,
 143                                                     target_service,
 144                                                     gensec_context);
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 TALLOC_FREE(settings);
 147                 return status;
 148         }
 149
 150         talloc_reparent(mem_ctx, *gensec_context, settings);
 151         return NT_STATUS_OK;
 152 }