s3-libnet-samsync: pass sequence number pointer to process routine.
[kai/samba.git] / source3 / libnet / libnet_samsync_keytab.c
1 /*
2    Unix SMB/CIFS implementation.
3    dump the remote SAM using rpc samsync operations
4
5    Copyright (C) Guenther Deschner 2008.
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 "libnet/libnet.h"
23
24 #if defined(HAVE_ADS) && defined(ENCTYPE_ARCFOUR_HMAC)
25
26 /****************************************************************
27 ****************************************************************/
28
29 static NTSTATUS keytab_ad_connect(TALLOC_CTX *mem_ctx,
30                                   const char *domain_name,
31                                   const char *username,
32                                   const char *password,
33                                   struct libnet_keytab_context *ctx)
34 {
35         NTSTATUS status;
36         ADS_STATUS ad_status;
37         ADS_STRUCT *ads;
38         struct netr_DsRGetDCNameInfo *info = NULL;
39         const char *dc;
40
41         status = dsgetdcname(mem_ctx, NULL, domain_name, NULL, NULL, 0, &info);
42         if (!NT_STATUS_IS_OK(status)) {
43                 return status;
44         }
45
46         dc = strip_hostname(info->dc_unc);
47
48         ads = ads_init(NULL, domain_name, dc);
49         NT_STATUS_HAVE_NO_MEMORY(ads);
50
51         if (getenv(KRB5_ENV_CCNAME) == NULL) {
52                 setenv(KRB5_ENV_CCNAME, "MEMORY:libnet_samsync_keytab", 1);
53         }
54
55         ads->auth.user_name = SMB_STRDUP(username);
56         ads->auth.password = SMB_STRDUP(password);
57
58         ad_status = ads_connect_user_creds(ads);
59         if (!ADS_ERR_OK(ad_status)) {
60                 return NT_STATUS_UNSUCCESSFUL;
61         }
62
63         ctx->ads = ads;
64
65         ctx->dns_domain_name = talloc_strdup_upper(mem_ctx, ads->config.realm);
66         NT_STATUS_HAVE_NO_MEMORY(ctx->dns_domain_name);
67
68         return NT_STATUS_OK;
69 }
70
71 /****************************************************************
72 ****************************************************************/
73
74 static NTSTATUS fetch_sam_entry_keytab(TALLOC_CTX *mem_ctx,
75                                        enum netr_SamDatabaseID database_id,
76                                        uint32_t rid,
77                                        struct netr_DELTA_USER *r,
78                                        struct libnet_keytab_context *ctx)
79 {
80         NTSTATUS status;
81         uint32_t kvno = 0;
82         DATA_BLOB blob;
83
84         if (memcmp(r->ntpassword.hash, ctx->zero_buf, 16) == 0) {
85                 return NT_STATUS_OK;
86         }
87
88         kvno = ads_get_kvno(ctx->ads, r->account_name.string);
89         blob = data_blob_const(r->ntpassword.hash, 16);
90
91         status = libnet_keytab_add_to_keytab_entries(mem_ctx, ctx,
92                                                      kvno,
93                                                      r->account_name.string,
94                                                      NULL,
95                                                      ENCTYPE_ARCFOUR_HMAC,
96                                                      blob);
97         if (!NT_STATUS_IS_OK(status)) {
98                 return status;
99         }
100
101         return NT_STATUS_OK;
102 }
103
104 /****************************************************************
105 ****************************************************************/
106
107 static NTSTATUS init_keytab(TALLOC_CTX *mem_ctx,
108                             struct samsync_context *ctx,
109                             enum netr_SamDatabaseID database_id,
110                             uint64_t *sequence_num)
111 {
112         krb5_error_code ret = 0;
113         NTSTATUS status;
114         struct libnet_keytab_context *keytab_ctx;
115
116         ret = libnet_keytab_init(mem_ctx, ctx->output_filename, &keytab_ctx);
117         if (ret) {
118                 return krb5_to_nt_status(ret);
119         }
120
121         keytab_ctx->clean_old_entries = ctx->clean_old_entries;
122         ctx->private_data = keytab_ctx;
123
124         status = keytab_ad_connect(mem_ctx,
125                                    ctx->domain_name,
126                                    ctx->username,
127                                    ctx->password,
128                                    keytab_ctx);
129         if (!NT_STATUS_IS_OK(status)) {
130                 TALLOC_FREE(keytab_ctx);
131                 return status;
132         }
133
134         return status;
135 }
136
137 /****************************************************************
138 ****************************************************************/
139
140 static NTSTATUS fetch_sam_entries_keytab(TALLOC_CTX *mem_ctx,
141                                          enum netr_SamDatabaseID database_id,
142                                          struct netr_DELTA_ENUM_ARRAY *r,
143                                          uint64_t *sequence_num,
144                                          struct samsync_context *ctx)
145 {
146         struct libnet_keytab_context *keytab_ctx =
147                 (struct libnet_keytab_context *)ctx->private_data;
148
149         NTSTATUS status = NT_STATUS_OK;
150         int i;
151
152         for (i = 0; i < r->num_deltas; i++) {
153
154                 if (r->delta_enum[i].delta_type != NETR_DELTA_USER) {
155                         continue;
156                 }
157
158                 status = fetch_sam_entry_keytab(mem_ctx, database_id,
159                                                 r->delta_enum[i].delta_id_union.rid,
160                                                 r->delta_enum[i].delta_union.user,
161                                                 keytab_ctx);
162                 if (!NT_STATUS_IS_OK(status)) {
163                         goto out;
164                 }
165         }
166  out:
167         return status;
168 }
169
170 /****************************************************************
171 ****************************************************************/
172
173 static NTSTATUS close_keytab(TALLOC_CTX *mem_ctx,
174                              struct samsync_context *ctx,
175                              enum netr_SamDatabaseID database_id,
176                              uint64_t sequence_num)
177 {
178         struct libnet_keytab_context *keytab_ctx =
179                 (struct libnet_keytab_context *)ctx->private_data;
180         krb5_error_code ret;
181         NTSTATUS status;
182
183         ret = libnet_keytab_add(keytab_ctx);
184         if (ret) {
185                 status = krb5_to_nt_status(ret);
186                 ctx->error_message = talloc_asprintf(ctx,
187                         "Failed to add entries to keytab %s: %s",
188                         keytab_ctx->keytab_name, error_message(ret));
189                 TALLOC_FREE(keytab_ctx);
190                 return status;
191         }
192
193         ctx->result_message = talloc_asprintf(ctx,
194                 "Vampired %d accounts to keytab %s",
195                 keytab_ctx->count,
196                 keytab_ctx->keytab_name);
197
198         TALLOC_FREE(keytab_ctx);
199
200         return NT_STATUS_OK;
201 }
202
203 #else
204
205 static NTSTATUS init_keytab(TALLOC_CTX *mem_ctx,
206                             struct samsync_context *ctx,
207                             enum netr_SamDatabaseID database_id,
208                             uint64_t *sequence_num)
209 {
210         return NT_STATUS_NOT_SUPPORTED;
211 }
212
213 static NTSTATUS fetch_sam_entries_keytab(TALLOC_CTX *mem_ctx,
214                                          enum netr_SamDatabaseID database_id,
215                                          struct netr_DELTA_ENUM_ARRAY *r,
216                                          uint64_t *sequence_num,
217                                          struct samsync_context *ctx)
218 {
219         return NT_STATUS_NOT_SUPPORTED;
220 }
221
222 static NTSTATUS close_keytab(TALLOC_CTX *mem_ctx,
223                              struct samsync_context *ctx,
224                              enum netr_SamDatabaseID database_id,
225                              uint64_t sequence_num)
226 {
227         return NT_STATUS_NOT_SUPPORTED;
228 }
229
230 #endif /* defined(HAVE_ADS) && defined(ENCTYPE_ARCFOUR_HMAC) */
231
232 const struct samsync_ops libnet_samsync_keytab_ops = {
233         .startup                = init_keytab,
234         .process_objects        = fetch_sam_entries_keytab,
235         .finish                 = close_keytab
236 };