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Unix SMB/CIFS implementation.
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User credentials handling (as regards on-disk files)
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Copyright (C) Jelmer Vernooij 2005
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Copyright (C) Tim Potter 2001
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "lib/events/events.h"
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#include "librpc/gen_ndr/samr.h" /* for struct samrPassword */
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#include "param/secrets.h"
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#include "system/filesys.h"
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#include "auth/credentials/credentials.h"
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#include "auth/credentials/credentials_krb5.h"
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#include "auth/kerberos/kerberos_util.h"
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#include "param/param.h"
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#include "lib/events/events.h"
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#include "dsdb/samdb/samdb.h"
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* Fill in credentials for the machine trust account, from the secrets database.
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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_PUBLIC_ NTSTATUS cli_credentials_set_secrets(struct cli_credentials *cred,
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struct loadparm_context *lp_ctx,
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struct ldb_context *ldb,
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struct ldb_message *msg;
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const char *machine_account;
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const char *old_password;
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enum netr_SchannelType sct;
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const char *salt_principal;
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const struct ldb_val *whenChanged;
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/* ok, we are going to get it now, don't recurse back here */
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cred->machine_account_pending = false;
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/* some other parts of the system will key off this */
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cred->machine_account = true;
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mem_ctx = talloc_named(cred, 0, "cli_credentials fetch machine password");
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/* Local secrets are stored in secrets.ldb */
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ldb = secrets_db_connect(mem_ctx, lp_ctx);
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/* set anonymous as the fallback, if the machine account won't work */
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cli_credentials_set_anonymous(cred);
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*error_string = talloc_strdup(cred, "Could not open secrets.ldb");
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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ldb_ret = dsdb_search_one(ldb, mem_ctx, &msg,
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ldb_dn_new(mem_ctx, ldb, base),
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NULL, 0, "%s", filter);
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if (ldb_ret != LDB_SUCCESS) {
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*error_string = talloc_asprintf(cred, "Could not find entry to match filter: '%s' base: '%s': %s: %s\n",
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filter, base ? base : "",
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ldb_strerror(ldb_ret), ldb_errstring(ldb));
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/* set anonymous as the fallback, if the machine account won't work */
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cli_credentials_set_anonymous(cred);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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password = ldb_msg_find_attr_as_string(msg, "secret", NULL);
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old_password = ldb_msg_find_attr_as_string(msg, "priorSecret", NULL);
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machine_account = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
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if (!machine_account) {
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machine_account = ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL);
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if (!machine_account) {
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const char *ldap_bind_dn = ldb_msg_find_attr_as_string(msg, "ldapBindDn", NULL);
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*error_string = talloc_asprintf(cred,
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"Could not find 'samAccountName', "
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"'servicePrincipalName' or "
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"'ldapBindDn' in secrets record: %s",
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ldb_dn_get_linearized(msg->dn));
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/* set anonymous as the fallback, if the machine account won't work */
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cli_credentials_set_anonymous(cred);
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talloc_free(mem_ctx);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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/* store bind dn in credentials */
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cli_credentials_set_bind_dn(cred, ldap_bind_dn);
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salt_principal = ldb_msg_find_attr_as_string(msg, "saltPrincipal", NULL);
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cli_credentials_set_salt_principal(cred, salt_principal);
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sct = ldb_msg_find_attr_as_int(msg, "secureChannelType", 0);
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cli_credentials_set_secure_channel_type(cred, sct);
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const struct ldb_val *nt_password_hash = ldb_msg_find_ldb_val(msg, "unicodePwd");
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struct samr_Password hash;
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if (nt_password_hash) {
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memcpy(hash.hash, nt_password_hash->data,
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MIN(nt_password_hash->length, sizeof(hash.hash)));
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cli_credentials_set_nt_hash(cred, &hash, CRED_SPECIFIED);
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cli_credentials_set_password(cred, NULL, CRED_SPECIFIED);
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cli_credentials_set_password(cred, password, CRED_SPECIFIED);
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domain = ldb_msg_find_attr_as_string(msg, "flatname", NULL);
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cli_credentials_set_domain(cred, domain, CRED_SPECIFIED);
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realm = ldb_msg_find_attr_as_string(msg, "realm", NULL);
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cli_credentials_set_realm(cred, realm, CRED_SPECIFIED);
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if (machine_account) {
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cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED);
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cli_credentials_set_kvno(cred, ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0));
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whenChanged = ldb_msg_find_ldb_val(msg, "whenChanged");
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if (ldb_val_to_time(whenChanged, &lct) == LDB_SUCCESS) {
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cli_credentials_set_password_last_changed_time(cred, lct);
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/* If there was an external keytab specified by reference in
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* the LDB, then use this. Otherwise we will make one up
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* (chewing CPU time) from the password */
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keytab = keytab_name_from_msg(cred, ldb, msg);
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cli_credentials_set_keytab_name(cred, lp_ctx, keytab, CRED_SPECIFIED);
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talloc_free(mem_ctx);
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* Fill in credentials for the machine trust account, from the secrets database.
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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_PUBLIC_ NTSTATUS cli_credentials_set_machine_account(struct cli_credentials *cred,
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struct loadparm_context *lp_ctx)
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/* Bleh, nasty recursion issues: We are setting a machine
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* account here, so we don't want the 'pending' flag around
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cred->machine_account_pending = false;
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filter = talloc_asprintf(cred, SECRETS_PRIMARY_DOMAIN_FILTER,
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cli_credentials_get_domain(cred));
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status = cli_credentials_set_secrets(cred, lp_ctx, NULL,
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SECRETS_PRIMARY_DOMAIN_DN,
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filter, &error_string);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Could not find machine account in secrets database: %s: %s", nt_errstr(status), error_string));
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talloc_free(error_string);
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* Fill in credentials for the machine trust account, from the secrets database.
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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NTSTATUS cli_credentials_set_krbtgt(struct cli_credentials *cred,
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struct loadparm_context *lp_ctx)
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/* Bleh, nasty recursion issues: We are setting a machine
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* account here, so we don't want the 'pending' flag around
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cred->machine_account_pending = false;
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filter = talloc_asprintf(cred, SECRETS_KRBTGT_SEARCH,
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cli_credentials_get_realm(cred),
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cli_credentials_get_domain(cred));
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status = cli_credentials_set_secrets(cred, lp_ctx, NULL,
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SECRETS_PRINCIPALS_DN,
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filter, &error_string);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Could not find krbtgt (master Kerberos) account in secrets database: %s: %s", nt_errstr(status), error_string));
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talloc_free(error_string);
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* Fill in credentials for a particular prinicpal, from the secrets database.
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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_PUBLIC_ NTSTATUS cli_credentials_set_stored_principal(struct cli_credentials *cred,
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struct loadparm_context *lp_ctx,
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const char *serviceprincipal)
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/* Bleh, nasty recursion issues: We are setting a machine
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* account here, so we don't want the 'pending' flag around
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cred->machine_account_pending = false;
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filter = talloc_asprintf(cred, SECRETS_PRINCIPAL_SEARCH,
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cli_credentials_get_realm(cred),
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cli_credentials_get_domain(cred),
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status = cli_credentials_set_secrets(cred, lp_ctx, NULL,
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SECRETS_PRINCIPALS_DN, filter,
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Could not find %s principal in secrets database: %s: %s", serviceprincipal, nt_errstr(status), error_string));
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* Ask that when required, the credentials system will be filled with
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* machine trust account, from the secrets database.
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* @param cred Credentials structure to fill in
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* @note This function is used to call the above function after, rather
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* than during, popt processing.
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_PUBLIC_ void cli_credentials_set_machine_account_pending(struct cli_credentials *cred,
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struct loadparm_context *lp_ctx)
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cred->machine_account_pending = true;
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cred->machine_account_pending_lp_ctx = lp_ctx;