diff options
Diffstat (limited to 'source4/auth/credentials/credentials_secrets.c')
| -rw-r--r-- | source4/auth/credentials/credentials_secrets.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/source4/auth/credentials/credentials_secrets.c b/source4/auth/credentials/credentials_secrets.c new file mode 100644 index 0000000000..4a9ccf5358 --- /dev/null +++ b/source4/auth/credentials/credentials_secrets.c @@ -0,0 +1,296 @@ +/* + Unix SMB/CIFS implementation. + + User credentials handling (as regards on-disk files) + + Copyright (C) Jelmer Vernooij 2005 + Copyright (C) Tim Potter 2001 + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005 + + 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/>. +*/ + +#include "includes.h" +#include "lib/events/events.h" +#include "lib/ldb/include/ldb.h" +#include "librpc/gen_ndr/samr.h" /* for struct samrPassword */ +#include "param/secrets.h" +#include "system/filesys.h" +#include "../lib/util/util_ldb.h" +#include "auth/credentials/credentials.h" +#include "auth/credentials/credentials_krb5.h" +#include "auth/credentials/credentials_proto.h" +#include "param/param.h" +#include "lib/events/events.h" +#include "dsdb/samdb/samdb.h" + +/** + * Fill in credentials for the machine trust account, from the secrets database. + * + * @param cred Credentials structure to fill in + * @retval NTSTATUS error detailing any failure + */ +_PUBLIC_ NTSTATUS cli_credentials_set_secrets(struct cli_credentials *cred, + struct tevent_context *event_ctx, + struct loadparm_context *lp_ctx, + struct ldb_context *ldb, + const char *base, + const char *filter, + char **error_string) +{ + TALLOC_CTX *mem_ctx; + + int ldb_ret; + struct ldb_message *msg; + + const char *machine_account; + const char *password; + const char *old_password; + const char *domain; + const char *realm; + enum netr_SchannelType sct; + const char *salt_principal; + char *keytab; + const struct ldb_val *whenChanged; + + /* ok, we are going to get it now, don't recurse back here */ + cred->machine_account_pending = false; + + /* some other parts of the system will key off this */ + cred->machine_account = true; + + mem_ctx = talloc_named(cred, 0, "cli_credentials fetch machine password"); + + if (!ldb) { + /* Local secrets are stored in secrets.ldb */ + ldb = secrets_db_connect(mem_ctx, event_ctx, lp_ctx); + if (!ldb) { + /* set anonymous as the fallback, if the machine account won't work */ + cli_credentials_set_anonymous(cred); + *error_string = talloc_strdup(cred, "Could not open secrets.ldb"); + talloc_free(mem_ctx); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } + } + + ldb_ret = dsdb_search_one(ldb, ldb, &msg, + ldb_dn_new(mem_ctx, ldb, base), + LDB_SCOPE_SUBTREE, + NULL, 0, "%s", filter); + + if (ldb_ret != LDB_SUCCESS) { + *error_string = talloc_asprintf(cred, "Could not find entry to match filter: '%s' base: '%s': %s: %s\n", + filter, base ? base : "", + ldb_strerror(ldb_ret), ldb_errstring(ldb)); + /* set anonymous as the fallback, if the machine account won't work */ + cli_credentials_set_anonymous(cred); + talloc_free(mem_ctx); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } + + password = ldb_msg_find_attr_as_string(msg, "secret", NULL); + old_password = ldb_msg_find_attr_as_string(msg, "priorSecret", NULL); + + machine_account = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL); + + if (!machine_account) { + machine_account = ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL); + + if (!machine_account) { + const char *ldap_bind_dn = ldb_msg_find_attr_as_string(msg, "ldapBindDn", NULL); + if (!ldap_bind_dn) { + *error_string = talloc_asprintf(cred, + "Could not find 'samAccountName', " + "'servicePrincipalName' or " + "'ldapBindDn' in secrets record: %s", + ldb_dn_get_linearized(msg->dn)); + /* set anonymous as the fallback, if the machine account won't work */ + cli_credentials_set_anonymous(cred); + talloc_free(mem_ctx); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } else { + /* store bind dn in credentials */ + cli_credentials_set_bind_dn(cred, ldap_bind_dn); + } + } + } + + salt_principal = ldb_msg_find_attr_as_string(msg, "saltPrincipal", NULL); + cli_credentials_set_salt_principal(cred, salt_principal); + + sct = ldb_msg_find_attr_as_int(msg, "secureChannelType", 0); + if (sct) { + cli_credentials_set_secure_channel_type(cred, sct); + } + + if (!password) { + const struct ldb_val *nt_password_hash = ldb_msg_find_ldb_val(msg, "unicodePwd"); + struct samr_Password hash; + ZERO_STRUCT(hash); + if (nt_password_hash) { + memcpy(hash.hash, nt_password_hash->data, + MIN(nt_password_hash->length, sizeof(hash.hash))); + + cli_credentials_set_nt_hash(cred, &hash, CRED_SPECIFIED); + } else { + cli_credentials_set_password(cred, NULL, CRED_SPECIFIED); + } + } else { + cli_credentials_set_password(cred, password, CRED_SPECIFIED); + } + + + domain = ldb_msg_find_attr_as_string(msg, "flatname", NULL); + if (domain) { + cli_credentials_set_domain(cred, domain, CRED_SPECIFIED); + } + + realm = ldb_msg_find_attr_as_string(msg, "realm", NULL); + if (realm) { + cli_credentials_set_realm(cred, realm, CRED_SPECIFIED); + } + + if (machine_account) { + cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED); + } + + cli_credentials_set_kvno(cred, ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0)); + + whenChanged = ldb_msg_find_ldb_val(msg, "whenChanged"); + if (whenChanged) { + time_t lct; + if (ldb_val_to_time(whenChanged, &lct) == LDB_SUCCESS) { + cli_credentials_set_password_last_changed_time(cred, lct); + } + } + + /* If there was an external keytab specified by reference in + * the LDB, then use this. Otherwise we will make one up + * (chewing CPU time) from the password */ + keytab = keytab_name_from_msg(cred, ldb, msg); + if (keytab) { + cli_credentials_set_keytab_name(cred, event_ctx, lp_ctx, keytab, CRED_SPECIFIED); + talloc_free(keytab); + } + talloc_free(mem_ctx); + + return NT_STATUS_OK; +} + +/** + * Fill in credentials for the machine trust account, from the secrets database. + * + * @param cred Credentials structure to fill in + * @retval NTSTATUS error detailing any failure + */ +_PUBLIC_ NTSTATUS cli_credentials_set_machine_account(struct cli_credentials *cred, + struct loadparm_context *lp_ctx) +{ + NTSTATUS status; + char *filter; + char *error_string; + /* Bleh, nasty recursion issues: We are setting a machine + * account here, so we don't want the 'pending' flag around + * any more */ + cred->machine_account_pending = false; + filter = talloc_asprintf(cred, SECRETS_PRIMARY_DOMAIN_FILTER, + cli_credentials_get_domain(cred)); + status = cli_credentials_set_secrets(cred, event_context_find(cred), lp_ctx, NULL, + SECRETS_PRIMARY_DOMAIN_DN, + filter, &error_string); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Could not find machine account in secrets database: %s: %s", nt_errstr(status), error_string)); + talloc_free(error_string); + } + return status; +} + +/** + * Fill in credentials for the machine trust account, from the secrets database. + * + * @param cred Credentials structure to fill in + * @retval NTSTATUS error detailing any failure + */ +NTSTATUS cli_credentials_set_krbtgt(struct cli_credentials *cred, + struct tevent_context *event_ctx, + struct loadparm_context *lp_ctx) +{ + NTSTATUS status; + char *filter; + char *error_string; + /* Bleh, nasty recursion issues: We are setting a machine + * account here, so we don't want the 'pending' flag around + * any more */ + cred->machine_account_pending = false; + filter = talloc_asprintf(cred, SECRETS_KRBTGT_SEARCH, + cli_credentials_get_realm(cred), + cli_credentials_get_domain(cred)); + status = cli_credentials_set_secrets(cred, event_ctx, lp_ctx, NULL, + SECRETS_PRINCIPALS_DN, + filter, &error_string); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Could not find krbtgt (master Kerberos) account in secrets database: %s: %s", nt_errstr(status), error_string)); + talloc_free(error_string); + } + return status; +} + +/** + * Fill in credentials for a particular prinicpal, from the secrets database. + * + * @param cred Credentials structure to fill in + * @retval NTSTATUS error detailing any failure + */ +_PUBLIC_ NTSTATUS cli_credentials_set_stored_principal(struct cli_credentials *cred, + struct tevent_context *event_ctx, + struct loadparm_context *lp_ctx, + const char *serviceprincipal) +{ + NTSTATUS status; + char *filter; + char *error_string; + /* Bleh, nasty recursion issues: We are setting a machine + * account here, so we don't want the 'pending' flag around + * any more */ + cred->machine_account_pending = false; + filter = talloc_asprintf(cred, SECRETS_PRINCIPAL_SEARCH, + cli_credentials_get_realm(cred), + cli_credentials_get_domain(cred), + serviceprincipal); + status = cli_credentials_set_secrets(cred, event_ctx, lp_ctx, NULL, + SECRETS_PRINCIPALS_DN, filter, + &error_string); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Could not find %s principal in secrets database: %s: %s", serviceprincipal, nt_errstr(status), error_string)); + } + return status; +} + +/** + * Ask that when required, the credentials system will be filled with + * machine trust account, from the secrets database. + * + * @param cred Credentials structure to fill in + * @note This function is used to call the above function after, rather + * than during, popt processing. + * + */ +_PUBLIC_ void cli_credentials_set_machine_account_pending(struct cli_credentials *cred, + struct loadparm_context *lp_ctx) +{ + cred->machine_account_pending = true; + cred->machine_account_pending_lp_ctx = lp_ctx; +} + + |