source3/libsmb/ntlmssp_wrap.c

   1 /*
   2    NLTMSSP wrappers
   3
   4    Copyright (C) Andrew Tridgell      2001
   5    Copyright (C) Andrew Bartlett 2001-2003,2011
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "auth/ntlmssp/ntlmssp.h"
  23 #include "ntlmssp_wrap.h"
  24 #include "auth/gensec/gensec.h"
  25 #include "auth/credentials/credentials.h"
  26 #include "librpc/rpc/dcerpc.h"
  27 #include "lib/param/param.h"
  28
  29 NTSTATUS auth_ntlmssp_set_username(struct auth_ntlmssp_state *ans,
  30                                    const char *user)
  31 {
  32         cli_credentials_set_username(ans->credentials, user, CRED_SPECIFIED);
  33         return NT_STATUS_OK;
  34 }
  35
  36 NTSTATUS auth_ntlmssp_set_domain(struct auth_ntlmssp_state *ans,
  37                                  const char *domain)
  38 {
  39         cli_credentials_set_domain(ans->credentials, domain, CRED_SPECIFIED);
  40         return NT_STATUS_OK;
  41 }
  42
  43 NTSTATUS auth_ntlmssp_set_password(struct auth_ntlmssp_state *ans,
  44                                    const char *password)
  45 {
  46         cli_credentials_set_password(ans->credentials, password, CRED_SPECIFIED);
  47         return NT_STATUS_OK;
  48 }
  49
  50 static NTSTATUS gensec_ntlmssp3_client_update(struct gensec_security *gensec_security,
  51                                               TALLOC_CTX *out_mem_ctx,
  52                                               struct tevent_context *ev,
  53                                               const DATA_BLOB request,
  54                                               DATA_BLOB *reply)
  55 {
  56         NTSTATUS status;
  57         struct gensec_ntlmssp_context *gensec_ntlmssp =
  58                 talloc_get_type_abort(gensec_security->private_data,
  59                                       struct gensec_ntlmssp_context);
  60
  61         status = ntlmssp_update(gensec_ntlmssp->ntlmssp_state, request, reply);
  62         if (NT_STATUS_IS_OK(status) ||
  63             NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  64                 talloc_steal(out_mem_ctx, reply->data);
  65         }
  66
  67         return status;
  68 }
  69
  70 static NTSTATUS gensec_ntlmssp3_client_start(struct gensec_security *gensec_security)
  71 {
  72         NTSTATUS nt_status;
  73         struct gensec_ntlmssp_context *gensec_ntlmssp;
  74         const char *user, *domain;
  75         const char *password;
  76
  77         nt_status = gensec_ntlmssp_start(gensec_security);
  78         NT_STATUS_NOT_OK_RETURN(nt_status);
  79
  80         gensec_ntlmssp =
  81                 talloc_get_type_abort(gensec_security->private_data,
  82                                       struct gensec_ntlmssp_context);
  83
  84         nt_status = ntlmssp_client_start(gensec_ntlmssp,
  85                                          lp_netbios_name(), lp_workgroup(),
  86                                          lp_client_ntlmv2_auth(), &gensec_ntlmssp->ntlmssp_state);
  87         if (!NT_STATUS_IS_OK(nt_status)) {
  88                 return nt_status;
  89         }
  90
  91         cli_credentials_get_ntlm_username_domain(gensec_security->credentials, gensec_ntlmssp, &user, &domain);
  92         if (!user || !domain) {
  93                 return NT_STATUS_NO_MEMORY;
  94         }
  95
  96         nt_status = ntlmssp_set_username(gensec_ntlmssp->ntlmssp_state, user);
  97         if (!NT_STATUS_IS_OK(nt_status)) {
  98                 return nt_status;
  99         }
 100
 101         nt_status = ntlmssp_set_domain(gensec_ntlmssp->ntlmssp_state, domain);
 102         if (!NT_STATUS_IS_OK(nt_status)) {
 103                 return nt_status;
 104         }
 105
 106         password = cli_credentials_get_password(gensec_security->credentials);
 107         if (!password) {
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110
 111         nt_status = ntlmssp_set_password(gensec_ntlmssp->ntlmssp_state, password);
 112         if (!NT_STATUS_IS_OK(nt_status)) {
 113                 return nt_status;
 114         }
 115
 116         if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
 117                 gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 118         }
 119         if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 120                 gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 121         }
 122         if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 123                 gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 124                 gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
 125         }
 126
 127         return NT_STATUS_OK;
 128 }
 129
 130 static const char *gensec_ntlmssp3_client_oids[] = {
 131         GENSEC_OID_NTLMSSP,
 132         NULL
 133 };
 134
 135 static const struct gensec_security_ops gensec_ntlmssp3_client_ops = {
 136         .name           = "ntlmssp3_client",
 137         .sasl_name      = GENSEC_SASL_NAME_NTLMSSP, /* "NTLM" */
 138         .auth_type      = DCERPC_AUTH_TYPE_NTLMSSP,
 139         .oid            = gensec_ntlmssp3_client_oids,
 140         .client_start   = gensec_ntlmssp3_client_start,
 141         .magic          = gensec_ntlmssp_magic,
 142         .update         = gensec_ntlmssp3_client_update,
 143         .sig_size       = gensec_ntlmssp_sig_size,
 144         .sign_packet    = gensec_ntlmssp_sign_packet,
 145         .check_packet   = gensec_ntlmssp_check_packet,
 146         .seal_packet    = gensec_ntlmssp_seal_packet,
 147         .unseal_packet  = gensec_ntlmssp_unseal_packet,
 148         .wrap           = gensec_ntlmssp_wrap,
 149         .unwrap         = gensec_ntlmssp_unwrap,
 150         .session_key    = gensec_ntlmssp_session_key,
 151         .have_feature   = gensec_ntlmssp_have_feature,
 152         .enabled        = true,
 153         .priority       = GENSEC_NTLMSSP
 154 };
 155
 156 NTSTATUS auth_ntlmssp_client_prepare(TALLOC_CTX *mem_ctx, struct auth_ntlmssp_state **auth_ntlmssp_state)
 157 {
 158         struct auth_ntlmssp_state *ans;
 159         NTSTATUS nt_status;
 160
 161         struct gensec_settings *gensec_settings;
 162         struct loadparm_context *lp_ctx;
 163
 164         ans = talloc_zero(mem_ctx, struct auth_ntlmssp_state);
 165         if (!ans) {
 166                 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
 167                 return NT_STATUS_NO_MEMORY;
 168         }
 169
 170         lp_ctx = loadparm_init_s3(ans, loadparm_s3_context());
 171         if (lp_ctx == NULL) {
 172                 DEBUG(10, ("loadparm_init_s3 failed\n"));
 173                 TALLOC_FREE(ans);
 174                 return NT_STATUS_INVALID_SERVER_STATE;
 175         }
 176
 177         gensec_settings = lpcfg_gensec_settings(ans, lp_ctx);
 178         if (lp_ctx == NULL) {
 179                 DEBUG(10, ("lpcfg_gensec_settings failed\n"));
 180                 TALLOC_FREE(ans);
 181                 return NT_STATUS_NO_MEMORY;
 182         }
 183
 184         nt_status = gensec_client_start(ans, &ans->gensec_security, gensec_settings);
 185
 186         if (!NT_STATUS_IS_OK(nt_status)) {
 187                 TALLOC_FREE(ans);
 188                 return nt_status;
 189         }
 190
 191         ans->credentials = cli_credentials_init(ans);
 192         if (!ans->credentials) {
 193                 TALLOC_FREE(ans);
 194                 return NT_STATUS_NO_MEMORY;
 195         }
 196
 197         cli_credentials_guess(ans->credentials, lp_ctx);
 198
 199         talloc_unlink(ans, lp_ctx);
 200         talloc_unlink(ans, gensec_settings);
 201
 202         *auth_ntlmssp_state = ans;
 203         return NT_STATUS_OK;
 204 }
 205
 206 NTSTATUS auth_ntlmssp_client_start(struct auth_ntlmssp_state *ans)
 207 {
 208         NTSTATUS status;
 209
 210         /* Transfer the credentials to gensec */
 211         status = gensec_set_credentials(ans->gensec_security, ans->credentials);
 212         if (!NT_STATUS_IS_OK(status)) {
 213                 DEBUG(1, ("Failed to set GENSEC credentials: %s\n",
 214                           nt_errstr(status)));
 215                 return status;
 216         }
 217         talloc_unlink(ans, ans->credentials);
 218         ans->credentials = NULL;
 219
 220         status = gensec_start_mech_by_ops(ans->gensec_security,
 221                                           &gensec_ntlmssp3_client_ops);
 222         if (!NT_STATUS_IS_OK(status)) {
 223                 return status;
 224         }
 225
 226         return NT_STATUS_OK;
 227 }