2 Unix SMB/CIFS implementation.
4 module to store/fetch session keys for the schannel server
6 Copyright (C) Andrew Tridgell 2004
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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "system/time.h"
25 #include "auth/auth.h"
26 #include "lib/ldb/include/ldb.h"
27 #include "lib/ldb/include/ldb_errors.h"
31 connect to the schannel ldb
33 static struct ldb_context *schannel_db_connect(TALLOC_CTX *mem_ctx)
36 struct ldb_context *ldb;
38 const char *init_ldif =
40 "computerName: CASE_INSENSITIVE\n" \
41 "flatname: CASE_INSENSITIVE\n";
43 path = smbd_tmp_path(mem_ctx, "schannel.ldb");
48 existed = file_exists(path);
50 ldb = ldb_wrap_connect(mem_ctx, path, system_session(mem_ctx),
51 NULL, LDB_FLG_NOSYNC, NULL);
58 gendb_add_ldif(ldb, init_ldif);
65 remember an established session key for a netr server authentication
66 use a simple ldb structure
68 NTSTATUS schannel_store_session_key(TALLOC_CTX *mem_ctx,
69 struct creds_CredentialState *creds)
71 struct ldb_context *ldb;
72 struct ldb_message *msg;
73 struct ldb_val val, seed;
78 ldb = schannel_db_connect(mem_ctx);
80 return NT_STATUS_NO_MEMORY;
83 f = talloc_asprintf(mem_ctx, "%u", (unsigned int)creds->negotiate_flags);
87 return NT_STATUS_NO_MEMORY;
90 sct = talloc_asprintf(mem_ctx, "%u", (unsigned int)creds->secure_channel_type);
94 return NT_STATUS_NO_MEMORY;
97 msg = ldb_msg_new(ldb);
100 return NT_STATUS_NO_MEMORY;
103 msg->dn = ldb_dn_build_child(msg, "computerName", creds->computer_name, NULL);
104 if (msg->dn == NULL) {
106 return NT_STATUS_NO_MEMORY;
109 val.data = creds->session_key;
110 val.length = sizeof(creds->session_key);
112 seed.data = creds->seed.data;
113 seed.length = sizeof(creds->seed.data);
115 ldb_msg_add_string(msg, "objectClass", "schannelState");
116 ldb_msg_add_value(msg, "sessionKey", &val);
117 ldb_msg_add_value(msg, "seed", &seed);
118 ldb_msg_add_string(msg, "negotiateFlags", f);
119 ldb_msg_add_string(msg, "secureChannelType", sct);
120 ldb_msg_add_string(msg, "accountName", creds->account_name);
121 ldb_msg_add_string(msg, "computerName", creds->computer_name);
122 ldb_msg_add_string(msg, "flatname", creds->domain);
123 samdb_msg_add_dom_sid(ldb, mem_ctx, msg, "objectSid", creds->sid);
125 ret = ldb_transaction_start(ldb);
127 DEBUG(0,("Unable to start transaction to add %s to session key db - %s\n",
128 ldb_dn_linearize(msg, msg->dn), ldb_errstring(ldb)));
130 return NT_STATUS_INTERNAL_DB_CORRUPTION;
133 ldb_delete(ldb, msg->dn);
135 ret = ldb_add(ldb, msg);
138 DEBUG(0,("Unable to add %s to session key db - %s\n",
139 ldb_dn_linearize(msg, msg->dn), ldb_errstring(ldb)));
141 return NT_STATUS_INTERNAL_DB_CORRUPTION;
144 ret = ldb_transaction_commit(ldb);
147 DEBUG(0,("Unable to commit adding %s to session key db - %s\n",
148 ldb_dn_linearize(msg, msg->dn), ldb_errstring(ldb)));
150 return NT_STATUS_INTERNAL_DB_CORRUPTION;
160 read back a credentials back for a computer
162 NTSTATUS schannel_fetch_session_key(TALLOC_CTX *mem_ctx,
163 const char *computer_name,
165 struct creds_CredentialState **creds)
167 struct ldb_context *ldb;
168 struct ldb_result *res;
170 const struct ldb_val *val;
173 *creds = talloc_zero(mem_ctx, struct creds_CredentialState);
175 return NT_STATUS_NO_MEMORY;
178 ldb = schannel_db_connect(mem_ctx);
180 return NT_STATUS_NO_MEMORY;
183 expr = talloc_asprintf(mem_ctx, "(&(computerName=%s)(flatname=%s))", computer_name, domain);
186 return NT_STATUS_NO_MEMORY;
189 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE, expr, NULL, &res);
190 if (ret != LDB_SUCCESS || res->count != 1) {
192 return NT_STATUS_INVALID_HANDLE;
195 val = ldb_msg_find_ldb_val(res->msgs[0], "sessionKey");
196 if (val == NULL || val->length != 16) {
197 DEBUG(1,("schannel: record in schannel DB must contain a sessionKey of length 16, when searching for client: %s\n", computer_name));
199 return NT_STATUS_INTERNAL_ERROR;
202 memcpy((*creds)->session_key, val->data, 16);
204 val = ldb_msg_find_ldb_val(res->msgs[0], "seed");
205 if (val == NULL || val->length != 8) {
206 DEBUG(1,("schannel: record in schannel DB must contain a vaid seed of length 8, when searching for client: %s\n", computer_name));
208 return NT_STATUS_INTERNAL_ERROR;
211 memcpy((*creds)->seed.data, val->data, 8);
213 (*creds)->negotiate_flags = ldb_msg_find_int(res->msgs[0], "negotiateFlags", 0);
215 (*creds)->secure_channel_type = ldb_msg_find_int(res->msgs[0], "secureChannelType", 0);
217 (*creds)->account_name = talloc_reference(*creds, ldb_msg_find_string(res->msgs[0], "accountName", NULL));
219 (*creds)->computer_name = talloc_reference(*creds, ldb_msg_find_string(res->msgs[0], "computerName", NULL));
221 (*creds)->domain = talloc_reference(*creds, ldb_msg_find_string(res->msgs[0], "flatname", NULL));
223 (*creds)->sid = samdb_result_dom_sid(*creds, res->msgs[0], "objectSid");