Check "auth event notification" param in log_json
[nivanova/samba-autobuild/.git] / auth / gensec / external.c
1 /*
2    Unix SMB/CIFS implementation.
3
4    SASL/EXTERNAL authentication.
5
6    Copyright (C) Howard Chu <hyc@symas.com> 2013
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 #include "includes.h"
23 #include <tevent.h>
24 #include "lib/util/tevent_ntstatus.h"
25 #include "auth/credentials/credentials.h"
26 #include "auth/gensec/gensec.h"
27 #include "auth/gensec/gensec_internal.h"
28 #include "auth/gensec/gensec_proto.h"
29 #include "auth/gensec/gensec_toplevel_proto.h"
30
31 #undef DBGC_CLASS
32 #define DBGC_CLASS DBGC_AUTH
33
34 /* SASL/EXTERNAL is essentially a no-op; it is only usable when the transport
35  * layer is already mutually authenticated.
36  */
37
38 NTSTATUS gensec_external_init(TALLOC_CTX *ctx);
39
40 static NTSTATUS gensec_external_start(struct gensec_security *gensec_security)
41 {
42         if (gensec_security->want_features & GENSEC_FEATURE_SIGN)
43                 return NT_STATUS_INVALID_PARAMETER;
44         if (gensec_security->want_features & GENSEC_FEATURE_SEAL)
45                 return NT_STATUS_INVALID_PARAMETER;
46
47         return NT_STATUS_OK;
48 }
49
50 struct gensec_external_update_state {
51         DATA_BLOB out;
52 };
53
54 static struct tevent_req *gensec_external_update_send(TALLOC_CTX *mem_ctx,
55                                         struct tevent_context *ev,
56                                         struct gensec_security *gensec_security,
57                                         const DATA_BLOB in)
58 {
59         struct tevent_req *req;
60         struct gensec_external_update_state *state = NULL;
61
62         req = tevent_req_create(mem_ctx, &state,
63                                 struct gensec_external_update_state);
64         if (req == NULL) {
65                 return NULL;
66         }
67
68         state->out = data_blob_talloc(state, "", 0);
69         if (tevent_req_nomem(state->out.data, req)) {
70                 return tevent_req_post(req, ev);
71         }
72
73         tevent_req_done(req);
74         return tevent_req_post(req, ev);
75 }
76
77 static NTSTATUS gensec_external_update_recv(struct tevent_req *req,
78                                             TALLOC_CTX *out_mem_ctx,
79                                             DATA_BLOB *out)
80 {
81         struct gensec_external_update_state *state =
82                 tevent_req_data(req,
83                 struct gensec_external_update_state);
84         NTSTATUS status;
85
86         *out = data_blob_null;
87
88         if (tevent_req_is_nterror(req, &status)) {
89                 tevent_req_received(req);
90                 return status;
91         }
92
93         *out = state->out;
94         tevent_req_received(req);
95         return NT_STATUS_OK;
96 }
97
98 /* We have no features */
99 static bool gensec_external_have_feature(struct gensec_security *gensec_security,
100                                      uint32_t feature)
101 {
102         return false;
103 }
104
105 static const struct gensec_security_ops gensec_external_ops = {
106         .name             = "sasl-EXTERNAL",
107         .sasl_name        = "EXTERNAL",
108         .client_start     = gensec_external_start,
109         .update_send      = gensec_external_update_send,
110         .update_recv      = gensec_external_update_recv,
111         .have_feature     = gensec_external_have_feature,
112         .enabled          = true,
113         .priority         = GENSEC_EXTERNAL
114 };
115
116
117 NTSTATUS gensec_external_init(TALLOC_CTX *ctx)
118 {
119         NTSTATUS ret;
120
121         ret = gensec_register(ctx, &gensec_external_ops);
122         if (!NT_STATUS_IS_OK(ret)) {
123                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
124                          gensec_external_ops.name));
125         }
126         return ret;
127 }