2 Unix SMB/CIFS implementation.
3 dump the remote SAM using rpc samsync operations
5 Copyright (C) Guenther Deschner 2008.
6 Copyright (C) Michael Adam 2008
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.
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.
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/>.
25 #include "libnet/libnet_keytab.h"
29 /****************************************************************
30 ****************************************************************/
32 static int keytab_close(struct libnet_keytab_context *ctx)
38 if (ctx->keytab && ctx->context) {
39 krb5_kt_close(ctx->context, ctx->keytab);
43 krb5_free_context(ctx->context);
47 ads_destroy(&ctx->ads);
55 /****************************************************************
56 ****************************************************************/
58 krb5_error_code libnet_keytab_init(TALLOC_CTX *mem_ctx,
59 const char *keytab_name,
60 struct libnet_keytab_context **ctx)
62 krb5_error_code ret = 0;
63 krb5_context context = NULL;
64 krb5_keytab keytab = NULL;
65 const char *keytab_string = NULL;
67 struct libnet_keytab_context *r;
69 r = talloc_zero(mem_ctx, struct libnet_keytab_context);
74 talloc_set_destructor(r, keytab_close);
76 initialize_krb5_error_table();
77 ret = krb5_init_context(&context);
79 DEBUG(1,("keytab_init: could not krb5_init_context: %s\n",
84 ret = smb_krb5_open_keytab(context, keytab_name, true, &keytab);
86 DEBUG(1,("keytab_init: smb_krb5_open_keytab failed (%s)\n",
88 krb5_free_context(context);
92 ret = smb_krb5_keytab_name(mem_ctx, context, keytab, &keytab_string);
94 krb5_kt_close(context, keytab);
95 krb5_free_context(context);
101 r->keytab_name = keytab_string;
102 r->clean_old_entries = false;
109 /****************************************************************
110 ****************************************************************/
113 * Remove all entries that have the given principal, kvno and enctype.
115 static krb5_error_code libnet_keytab_remove_entries(krb5_context context,
117 const char *principal,
119 const krb5_enctype enctype,
123 krb5_kt_cursor cursor;
124 krb5_keytab_entry kt_entry;
126 ZERO_STRUCT(kt_entry);
129 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
134 while (krb5_kt_next_entry(context, keytab, &kt_entry, &cursor) == 0)
137 char *princ_s = NULL;
139 if (kt_entry.vno != kvno && !ignore_kvno) {
143 keyp = KRB5_KT_KEY(&kt_entry);
145 if (KRB5_KEY_TYPE(keyp) != enctype) {
149 ret = smb_krb5_unparse_name(talloc_tos(), context, kt_entry.principal,
152 DEBUG(5, ("smb_krb5_unparse_name failed (%s)\n",
153 error_message(ret)));
157 if (strcmp(principal, princ_s) != 0) {
161 /* match found - remove */
163 DEBUG(10, ("found entry for principal %s, kvno %d, "
164 "enctype %d - trying to remove it\n",
165 princ_s, kt_entry.vno, KRB5_KEY_TYPE(keyp)));
167 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
170 DEBUG(5, ("krb5_kt_end_seq_get failed (%s)\n",
171 error_message(ret)));
175 ret = krb5_kt_remove_entry(context, keytab,
178 DEBUG(5, ("krb5_kt_remove_entry failed (%s)\n",
179 error_message(ret)));
182 DEBUG(10, ("removed entry for principal %s, kvno %d, "
183 "enctype %d\n", princ_s, kt_entry.vno,
184 KRB5_KEY_TYPE(keyp)));
186 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
188 DEBUG(5, ("krb5_kt_start_seq_get failed (%s)\n",
189 error_message(ret)));
194 smb_krb5_kt_free_entry(context, &kt_entry);
195 TALLOC_FREE(princ_s);
198 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
200 DEBUG(5, ("krb5_kt_end_seq_get failed (%s)\n",
201 error_message(ret)));
207 static krb5_error_code libnet_keytab_add_entry(krb5_context context,
211 krb5_enctype enctype,
215 krb5_keytab_entry kt_entry;
218 /* remove duplicates first ... */
219 ret = libnet_keytab_remove_entries(context, keytab, princ_s, kvno,
222 DEBUG(1, ("libnet_keytab_remove_entries failed: %s\n",
223 error_message(ret)));
226 ZERO_STRUCT(kt_entry);
230 ret = smb_krb5_parse_name(context, princ_s, &kt_entry.principal);
232 DEBUG(1, ("smb_krb5_parse_name(%s) failed (%s)\n",
233 princ_s, error_message(ret)));
237 keyp = KRB5_KT_KEY(&kt_entry);
239 if (create_kerberos_key_from_string(context, kt_entry.principal,
240 &password, keyp, enctype, true))
242 ret = KRB5KRB_ERR_GENERIC;
246 ret = krb5_kt_add_entry(context, keytab, &kt_entry);
248 DEBUG(1, ("adding entry to keytab failed (%s)\n",
249 error_message(ret)));
253 krb5_free_keyblock_contents(context, keyp);
254 krb5_free_principal(context, kt_entry.principal);
255 ZERO_STRUCT(kt_entry);
256 smb_krb5_kt_free_entry(context, &kt_entry);
261 krb5_error_code libnet_keytab_add(struct libnet_keytab_context *ctx)
263 krb5_error_code ret = 0;
267 if (ctx->clean_old_entries) {
268 DEBUG(0, ("cleaning old entries...\n"));
269 for (i=0; i < ctx->count; i++) {
270 struct libnet_keytab_entry *entry = &ctx->entries[i];
272 ret = libnet_keytab_remove_entries(ctx->context,
279 DEBUG(1,("libnet_keytab_add: Failed to remove "
280 "old entries for %s (enctype %u): %s\n",
281 entry->principal, entry->enctype,
282 error_message(ret)));
288 for (i=0; i<ctx->count; i++) {
290 struct libnet_keytab_entry *entry = &ctx->entries[i];
293 ZERO_STRUCT(password);
294 password.data = (char *)entry->password.data;
295 password.length = entry->password.length;
297 ret = libnet_keytab_add_entry(ctx->context,
304 DEBUG(1,("libnet_keytab_add: "
305 "Failed to add entry to keytab file\n"));
313 struct libnet_keytab_entry *libnet_keytab_search(struct libnet_keytab_context *ctx,
314 const char *principal,
316 const krb5_enctype enctype,
319 krb5_error_code ret = 0;
320 krb5_kt_cursor cursor;
321 krb5_keytab_entry kt_entry;
322 struct libnet_keytab_entry *entry = NULL;
324 ZERO_STRUCT(kt_entry);
327 ret = krb5_kt_start_seq_get(ctx->context, ctx->keytab, &cursor);
329 DEBUG(10, ("krb5_kt_start_seq_get failed: %s\n",
330 error_message(ret)));
334 while (krb5_kt_next_entry(ctx->context, ctx->keytab, &kt_entry, &cursor) == 0)
337 char *princ_s = NULL;
341 if (kt_entry.vno != kvno) {
345 keyp = KRB5_KT_KEY(&kt_entry);
347 if (KRB5_KEY_TYPE(keyp) != enctype) {
351 entry = talloc_zero(mem_ctx, struct libnet_keytab_entry);
353 DEBUG(3, ("talloc failed\n"));
357 ret = smb_krb5_unparse_name(entry, ctx->context, kt_entry.principal,
363 if (strcmp(principal, princ_s) != 0) {
367 entry->principal = talloc_strdup(entry, princ_s);
368 if (!entry->principal) {
369 DEBUG(3, ("talloc_strdup_failed\n"));
373 entry->name = talloc_move(entry, &princ_s);
375 entry->password = data_blob_talloc(entry, KRB5_KEY_DATA(keyp),
376 KRB5_KEY_LENGTH(keyp));
377 if (!entry->password.data) {
378 DEBUG(3, ("data_blob_talloc failed\n"));
382 DEBUG(10, ("found entry\n"));
384 smb_krb5_kt_free_entry(ctx->context, &kt_entry);
388 smb_krb5_kt_free_entry(ctx->context, &kt_entry);
393 smb_krb5_kt_free_entry(ctx->context, &kt_entry);
398 krb5_kt_end_seq_get(ctx->context, ctx->keytab, &cursor);
403 * Helper function to add data to the list
404 * of keytab entries. It builds the prefix from the input.
406 NTSTATUS libnet_keytab_add_to_keytab_entries(TALLOC_CTX *mem_ctx,
407 struct libnet_keytab_context *ctx,
411 const krb5_enctype enctype,
414 struct libnet_keytab_entry entry;
417 entry.name = talloc_strdup(mem_ctx, name);
418 entry.principal = talloc_asprintf(mem_ctx, "%s%s%s@%s",
419 prefix ? prefix : "",
421 name, ctx->dns_domain_name);
422 entry.enctype = enctype;
423 entry.password = blob;
424 NT_STATUS_HAVE_NO_MEMORY(entry.name);
425 NT_STATUS_HAVE_NO_MEMORY(entry.principal);
426 NT_STATUS_HAVE_NO_MEMORY(entry.password.data);
428 ADD_TO_ARRAY(mem_ctx, struct libnet_keytab_entry, entry,
429 &ctx->entries, &ctx->count);
430 NT_STATUS_HAVE_NO_MEMORY(ctx->entries);
435 #endif /* HAVE_KRB5 */