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Diffstat (limited to 'source3/passdb/machine_account_secrets.c')
-rw-r--r--source3/passdb/machine_account_secrets.c398
1 files changed, 398 insertions, 0 deletions
diff --git a/source3/passdb/machine_account_secrets.c b/source3/passdb/machine_account_secrets.c
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index 0000000000..4a1c3faa87
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+++ b/source3/passdb/machine_account_secrets.c
@@ -0,0 +1,398 @@
+/*
+ Unix SMB/CIFS implementation.
+ Copyright (C) Andrew Tridgell 1992-2001
+ Copyright (C) Andrew Bartlett 2002
+ Copyright (C) Rafal Szczesniak 2002
+ Copyright (C) Tim Potter 2001
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* the Samba secrets database stores any generated, private information
+ such as the local SID and machine trust password */
+
+#include "includes.h"
+#include "../libcli/auth/libcli_auth.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
+/* Urrrg. global.... */
+bool global_machine_password_needs_changing;
+
+/**
+ * Form a key for fetching the domain sid
+ *
+ * @param domain domain name
+ *
+ * @return keystring
+ **/
+static const char *domain_sid_keystr(const char *domain)
+{
+ char *keystr;
+
+ keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+ SECRETS_DOMAIN_SID, domain);
+ SMB_ASSERT(keystr != NULL);
+ return keystr;
+}
+
+bool secrets_store_domain_sid(const char *domain, const struct dom_sid *sid)
+{
+ bool ret;
+
+ ret = secrets_store(domain_sid_keystr(domain), sid, sizeof(struct dom_sid ));
+
+ /* Force a re-query, in case we modified our domain */
+ if (ret)
+ reset_global_sam_sid();
+ return ret;
+}
+
+bool secrets_fetch_domain_sid(const char *domain, struct dom_sid *sid)
+{
+ struct dom_sid *dyn_sid;
+ size_t size = 0;
+
+ dyn_sid = (struct dom_sid *)secrets_fetch(domain_sid_keystr(domain), &size);
+
+ if (dyn_sid == NULL)
+ return False;
+
+ if (size != sizeof(struct dom_sid)) {
+ SAFE_FREE(dyn_sid);
+ return False;
+ }
+
+ *sid = *dyn_sid;
+ SAFE_FREE(dyn_sid);
+ return True;
+}
+
+bool secrets_store_domain_guid(const char *domain, struct GUID *guid)
+{
+ fstring key;
+
+ slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
+ strupper_m(key);
+ return secrets_store(key, guid, sizeof(struct GUID));
+}
+
+bool secrets_fetch_domain_guid(const char *domain, struct GUID *guid)
+{
+ struct GUID *dyn_guid;
+ fstring key;
+ size_t size = 0;
+ struct GUID new_guid;
+
+ slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
+ strupper_m(key);
+ dyn_guid = (struct GUID *)secrets_fetch(key, &size);
+
+ if (!dyn_guid) {
+ if (lp_server_role() == ROLE_DOMAIN_PDC) {
+ new_guid = GUID_random();
+ if (!secrets_store_domain_guid(domain, &new_guid))
+ return False;
+ dyn_guid = (struct GUID *)secrets_fetch(key, &size);
+ }
+ if (dyn_guid == NULL) {
+ return False;
+ }
+ }
+
+ if (size != sizeof(struct GUID)) {
+ DEBUG(1,("UUID size %d is wrong!\n", (int)size));
+ SAFE_FREE(dyn_guid);
+ return False;
+ }
+
+ *guid = *dyn_guid;
+ SAFE_FREE(dyn_guid);
+ return True;
+}
+
+/**
+ * Form a key for fetching the machine trust account sec channel type
+ *
+ * @param domain domain name
+ *
+ * @return keystring
+ **/
+static const char *machine_sec_channel_type_keystr(const char *domain)
+{
+ char *keystr;
+
+ keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+ SECRETS_MACHINE_SEC_CHANNEL_TYPE,
+ domain);
+ SMB_ASSERT(keystr != NULL);
+ return keystr;
+}
+
+/**
+ * Form a key for fetching the machine trust account last change time
+ *
+ * @param domain domain name
+ *
+ * @return keystring
+ **/
+static const char *machine_last_change_time_keystr(const char *domain)
+{
+ char *keystr;
+
+ keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+ SECRETS_MACHINE_LAST_CHANGE_TIME,
+ domain);
+ SMB_ASSERT(keystr != NULL);
+ return keystr;
+}
+
+
+/**
+ * Form a key for fetching the machine trust account password
+ *
+ * @param domain domain name
+ *
+ * @return keystring
+ **/
+static const char *machine_password_keystr(const char *domain)
+{
+ char *keystr;
+
+ keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+ SECRETS_MACHINE_PASSWORD, domain);
+ SMB_ASSERT(keystr != NULL);
+ return keystr;
+}
+
+/**
+ * Form a key for fetching the machine trust account password
+ *
+ * @param domain domain name
+ *
+ * @return stored password's key
+ **/
+static const char *trust_keystr(const char *domain)
+{
+ char *keystr;
+
+ keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+ SECRETS_MACHINE_ACCT_PASS, domain);
+ SMB_ASSERT(keystr != NULL);
+ return keystr;
+}
+
+/************************************************************************
+ Lock the trust password entry.
+************************************************************************/
+
+void *secrets_get_trust_account_lock(TALLOC_CTX *mem_ctx, const char *domain)
+{
+ struct db_context *db_ctx;
+ if (!secrets_init()) {
+ return NULL;
+ }
+
+ db_ctx = secrets_db_ctx();
+
+ return db_ctx->fetch_locked(
+ db_ctx, mem_ctx, string_term_tdb_data(trust_keystr(domain)));
+}
+
+/************************************************************************
+ Routine to get the default secure channel type for trust accounts
+************************************************************************/
+
+enum netr_SchannelType get_default_sec_channel(void)
+{
+ if (lp_server_role() == ROLE_DOMAIN_BDC ||
+ lp_server_role() == ROLE_DOMAIN_PDC) {
+ return SEC_CHAN_BDC;
+ } else {
+ return SEC_CHAN_WKSTA;
+ }
+}
+
+/************************************************************************
+ Routine to get the trust account password for a domain.
+ This only tries to get the legacy hashed version of the password.
+ The user of this function must have locked the trust password file using
+ the above secrets_lock_trust_account_password().
+************************************************************************/
+
+bool secrets_fetch_trust_account_password_legacy(const char *domain,
+ uint8 ret_pwd[16],
+ time_t *pass_last_set_time,
+ enum netr_SchannelType *channel)
+{
+ struct machine_acct_pass *pass;
+ size_t size = 0;
+
+ if (!(pass = (struct machine_acct_pass *)secrets_fetch(
+ trust_keystr(domain), &size))) {
+ DEBUG(5, ("secrets_fetch failed!\n"));
+ return False;
+ }
+
+ if (size != sizeof(*pass)) {
+ DEBUG(0, ("secrets were of incorrect size!\n"));
+ SAFE_FREE(pass);
+ return False;
+ }
+
+ if (pass_last_set_time) {
+ *pass_last_set_time = pass->mod_time;
+ }
+ memcpy(ret_pwd, pass->hash, 16);
+
+ if (channel) {
+ *channel = get_default_sec_channel();
+ }
+
+ /* Test if machine password has expired and needs to be changed */
+ if (lp_machine_password_timeout()) {
+ if (pass->mod_time > 0 && time(NULL) > (pass->mod_time +
+ (time_t)lp_machine_password_timeout())) {
+ global_machine_password_needs_changing = True;
+ }
+ }
+
+ SAFE_FREE(pass);
+ return True;
+}
+
+/************************************************************************
+ Routine to get the trust account password for a domain.
+ The user of this function must have locked the trust password file using
+ the above secrets_lock_trust_account_password().
+************************************************************************/
+
+bool secrets_fetch_trust_account_password(const char *domain, uint8 ret_pwd[16],
+ time_t *pass_last_set_time,
+ enum netr_SchannelType *channel)
+{
+ char *plaintext;
+
+ plaintext = secrets_fetch_machine_password(domain, pass_last_set_time,
+ channel);
+ if (plaintext) {
+ DEBUG(4,("Using cleartext machine password\n"));
+ E_md4hash(plaintext, ret_pwd);
+ SAFE_FREE(plaintext);
+ return True;
+ }
+
+ return secrets_fetch_trust_account_password_legacy(domain, ret_pwd,
+ pass_last_set_time,
+ channel);
+}
+
+/************************************************************************
+ Routine to delete the plaintext machine account password
+************************************************************************/
+
+bool secrets_delete_machine_password(const char *domain)
+{
+ return secrets_delete(machine_password_keystr(domain));
+}
+
+/************************************************************************
+ Routine to delete the plaintext machine account password, sec channel type and
+ last change time from secrets database
+************************************************************************/
+
+bool secrets_delete_machine_password_ex(const char *domain)
+{
+ if (!secrets_delete(machine_password_keystr(domain))) {
+ return false;
+ }
+ if (!secrets_delete(machine_sec_channel_type_keystr(domain))) {
+ return false;
+ }
+ return secrets_delete(machine_last_change_time_keystr(domain));
+}
+
+/************************************************************************
+ Routine to delete the domain sid
+************************************************************************/
+
+bool secrets_delete_domain_sid(const char *domain)
+{
+ return secrets_delete(domain_sid_keystr(domain));
+}
+
+/************************************************************************
+ Routine to set the plaintext machine account password for a realm
+the password is assumed to be a null terminated ascii string
+************************************************************************/
+
+bool secrets_store_machine_password(const char *pass, const char *domain,
+ enum netr_SchannelType sec_channel)
+{
+ bool ret;
+ uint32 last_change_time;
+ uint32 sec_channel_type;
+
+ ret = secrets_store(machine_password_keystr(domain), pass, strlen(pass)+1);
+ if (!ret)
+ return ret;
+
+ SIVAL(&last_change_time, 0, time(NULL));
+ ret = secrets_store(machine_last_change_time_keystr(domain), &last_change_time, sizeof(last_change_time));
+
+ SIVAL(&sec_channel_type, 0, sec_channel);
+ ret = secrets_store(machine_sec_channel_type_keystr(domain), &sec_channel_type, sizeof(sec_channel_type));
+
+ return ret;
+}
+
+/************************************************************************
+ Routine to fetch the plaintext machine account password for a realm
+ the password is assumed to be a null terminated ascii string.
+************************************************************************/
+
+char *secrets_fetch_machine_password(const char *domain,
+ time_t *pass_last_set_time,
+ enum netr_SchannelType *channel)
+{
+ char *ret;
+ ret = (char *)secrets_fetch(machine_password_keystr(domain), NULL);
+
+ if (pass_last_set_time) {
+ size_t size;
+ uint32 *last_set_time;
+ last_set_time = (unsigned int *)secrets_fetch(machine_last_change_time_keystr(domain), &size);
+ if (last_set_time) {
+ *pass_last_set_time = IVAL(last_set_time,0);
+ SAFE_FREE(last_set_time);
+ } else {
+ *pass_last_set_time = 0;
+ }
+ }
+
+ if (channel) {
+ size_t size;
+ uint32 *channel_type;
+ channel_type = (unsigned int *)secrets_fetch(machine_sec_channel_type_keystr(domain), &size);
+ if (channel_type) {
+ *channel = IVAL(channel_type,0);
+ SAFE_FREE(channel_type);
+ } else {
+ *channel = get_default_sec_channel();
+ }
+ }
+
+ return ret;
+}