Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 886 insertions, 0 deletions

diff --git a/source4/kdc/hdb-samba4.c b/source4/kdc/hdb-samba4.c
new file mode 100644
index 0000000..e465a28
--- /dev/null
+++ b/source4/kdc/hdb-samba4.c
@@ -0,0 +1,886 @@
+/*
+ * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
+ * Copyright (c) 2004-2009, Andrew Bartlett <abartlet@samba.org>.
+ * Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of PADL Software  nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "includes.h"
+#include "kdc/kdc-glue.h"
+#include "kdc/db-glue.h"
+#include "auth/auth_sam.h"
+#include "auth/common_auth.h"
+#include <ldb.h>
+#include "sdb.h"
+#include "sdb_hdb.h"
+#include "dsdb/samdb/samdb.h"
+#include "param/param.h"
+#include "../lib/tsocket/tsocket.h"
+#include "librpc/gen_ndr/ndr_winbind_c.h"
+#include "lib/messaging/irpc.h"
+#include "hdb.h"
+#include <kdc-audit.h>
+
+static krb5_error_code hdb_samba4_open(krb5_context context, HDB *db, int flags, mode_t mode)
+{
+	if (db->hdb_master_key_set) {
+		krb5_error_code ret = HDB_ERR_NOENTRY;
+		krb5_warnx(context, "hdb_samba4_open: use of a master key incompatible with LDB\n");
+		krb5_set_error_message(context, ret, "hdb_samba4_open: use of a master key incompatible with LDB\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static krb5_error_code hdb_samba4_close(krb5_context context, HDB *db)
+{
+	return 0;
+}
+
+static krb5_error_code hdb_samba4_lock(krb5_context context, HDB *db, int operation)
+{
+	return 0;
+}
+
+static krb5_error_code hdb_samba4_unlock(krb5_context context, HDB *db)
+{
+	return 0;
+}
+
+static krb5_error_code hdb_samba4_rename(krb5_context context, HDB *db, const char *new_name)
+{
+	return HDB_ERR_DB_INUSE;
+}
+
+static krb5_error_code hdb_samba4_store(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
+{
+	return HDB_ERR_DB_INUSE;
+}
+
+/*
+ * If we ever want kadmin to work fast, we might try and reopen the
+ * ldb with LDB_NOSYNC
+ */
+static krb5_error_code hdb_samba4_set_sync(krb5_context context, struct HDB *db, int set_sync)
+{
+	return 0;
+}
+
+static void hdb_samba4_free_entry_context(krb5_context context, struct HDB *db, hdb_entry *entry)
+{
+	/*
+	 * This function is now called for every HDB entry, not just those with
+	 * 'context' set, so we have to check that the context is not NULL.
+	*/
+	if (entry->context != NULL) {
+		struct samba_kdc_entry *skdc_entry =
+			talloc_get_type_abort(entry->context,
+			struct samba_kdc_entry);
+
+		/* this function is called only from hdb_free_entry().
+		 * Make sure we neutralize the destructor or we will
+		 * get a double free later when hdb_free_entry() will
+		 * try to call free_hdb_entry() */
+		entry->context = NULL;
+		skdc_entry->kdc_entry = NULL;
+		TALLOC_FREE(skdc_entry);
+	}
+}
+
+static int hdb_samba4_fill_fast_cookie(krb5_context context,
+				       struct samba_kdc_db_context *kdc_db_ctx)
+{
+	struct ldb_message *msg = ldb_msg_new(kdc_db_ctx);
+	int ldb_ret;
+
+	uint8_t secretbuffer[32];
+	struct ldb_val val = data_blob_const(secretbuffer,
+					     sizeof(secretbuffer));
+
+	if (msg == NULL) {
+		DBG_ERR("Failed to allocate msg for new fast cookie\n");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* Fill in all the keys with the same secret */
+	generate_secret_buffer(secretbuffer,
+			       sizeof(secretbuffer));
+
+	msg->dn = kdc_db_ctx->fx_cookie_dn;
+
+	ldb_ret = ldb_msg_add_value(msg, "secret", &val, NULL);
+
+	if (ldb_ret != LDB_SUCCESS) {
+		return ldb_ret;
+	}
+
+	ldb_ret = ldb_add(kdc_db_ctx->secrets_db,
+			  msg);
+	if (ldb_ret != LDB_SUCCESS) {
+		DBG_ERR("Failed to add fast cookie to ldb: %s\n",
+			ldb_errstring(kdc_db_ctx->secrets_db));
+	}
+	return ldb_ret;
+}
+
+static krb5_error_code hdb_samba4_fetch_fast_cookie(krb5_context context,
+						    struct samba_kdc_db_context *kdc_db_ctx,
+						    hdb_entry *entry)
+{
+	krb5_error_code ret = SDB_ERR_NOENTRY;
+	TALLOC_CTX *mem_ctx;
+	struct ldb_result *res;
+	int ldb_ret;
+	struct sdb_entry sentry = {};
+	const char *attrs[] = {
+		"secret",
+		NULL
+	};
+	const struct ldb_val *val;
+
+	mem_ctx = talloc_named(kdc_db_ctx, 0, "samba_kdc_fetch context");
+	if (!mem_ctx) {
+		ret = ENOMEM;
+		krb5_set_error_message(context, ret, "samba_kdc_fetch: talloc_named() failed!");
+		return ret;
+	}
+
+	/* search for CN=FX-COOKIE */
+	ldb_ret = ldb_search(kdc_db_ctx->secrets_db,
+			     mem_ctx,
+			     &res,
+			     kdc_db_ctx->fx_cookie_dn,
+			     LDB_SCOPE_BASE,
+			     attrs, NULL);
+
+	if (ldb_ret == LDB_ERR_NO_SUCH_OBJECT || res->count == 0) {
+
+		ldb_ret = hdb_samba4_fill_fast_cookie(context,
+						      kdc_db_ctx);
+
+		if (ldb_ret != LDB_SUCCESS) {
+			TALLOC_FREE(mem_ctx);
+			return HDB_ERR_NO_WRITE_SUPPORT;
+		}
+
+		/* search for CN=FX-COOKIE */
+		ldb_ret = ldb_search(kdc_db_ctx->secrets_db,
+				     mem_ctx,
+				     &res,
+				     kdc_db_ctx->fx_cookie_dn,
+				     LDB_SCOPE_BASE,
+				     attrs, NULL);
+
+		if (ldb_ret != LDB_SUCCESS || res->count != 1) {
+			TALLOC_FREE(mem_ctx);
+			return HDB_ERR_NOENTRY;
+		}
+	}
+
+	val = ldb_msg_find_ldb_val(res->msgs[0],
+				   "secret");
+	if (val == NULL || val->length != 32) {
+		TALLOC_FREE(mem_ctx);
+		return HDB_ERR_NOENTRY;
+	}
+
+
+	ret = krb5_make_principal(context,
+				  &sentry.principal,
+				  KRB5_WELLKNOWN_ORG_H5L_REALM,
+				  KRB5_WELLKNOWN_NAME, "org.h5l.fast-cookie",
+				  NULL);
+	if (ret) {
+		TALLOC_FREE(mem_ctx);
+		return ret;
+	}
+
+	ret = samba_kdc_set_fixed_keys(context, val, ENC_ALL_TYPES,
+				       &sentry.keys);
+	if (ret != 0) {
+		return ret;
+	}
+
+	ret = sdb_entry_to_hdb_entry(context, &sentry, entry);
+	sdb_entry_free(&sentry);
+	TALLOC_FREE(mem_ctx);
+
+	return ret;
+}
+
+static krb5_error_code hdb_samba4_fetch_kvno(krb5_context context, HDB *db,
+					     krb5_const_principal principal,
+					     unsigned flags,
+					     krb5_kvno kvno,
+					     hdb_entry *entry)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	struct sdb_entry sentry = {};
+	krb5_error_code code, ret;
+	uint32_t sflags;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+
+	if (flags & HDB_F_GET_FAST_COOKIE) {
+		return hdb_samba4_fetch_fast_cookie(context,
+						    kdc_db_ctx,
+						    entry);
+	}
+
+	sflags = (flags & SDB_F_HDB_MASK);
+
+	ret = samba_kdc_fetch(context,
+			      kdc_db_ctx,
+			      principal,
+			      sflags,
+			      kvno,
+			      &sentry);
+	switch (ret) {
+	case 0:
+		code = 0;
+		break;
+	case SDB_ERR_WRONG_REALM:
+		/*
+		 * If SDB_ERR_WRONG_REALM is returned we need to process the
+		 * sdb_entry to fill the principal in the HDB entry.
+		 */
+		code = HDB_ERR_WRONG_REALM;
+		break;
+	case SDB_ERR_NOENTRY:
+		return HDB_ERR_NOENTRY;
+	case SDB_ERR_NOT_FOUND_HERE:
+		return HDB_ERR_NOT_FOUND_HERE;
+	default:
+		return ret;
+	}
+
+	ret = sdb_entry_to_hdb_entry(context, &sentry, entry);
+	sdb_entry_free(&sentry);
+
+	if (code != 0 && ret != 0) {
+		code = ret;
+	}
+
+	return code;
+}
+
+static krb5_error_code hdb_samba4_kpasswd_fetch_kvno(krb5_context context, HDB *db,
+						     krb5_const_principal _principal,
+						     unsigned flags,
+						     krb5_kvno _kvno,
+						     hdb_entry *entry)
+{
+	struct samba_kdc_db_context *kdc_db_ctx = NULL;
+	krb5_error_code ret;
+	krb5_principal kpasswd_principal = NULL;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+
+	ret = smb_krb5_make_principal(context, &kpasswd_principal,
+				      lpcfg_realm(kdc_db_ctx->lp_ctx),
+				      "kadmin", "changepw",
+				      NULL);
+	if (ret) {
+		return ret;
+	}
+	smb_krb5_principal_set_type(context, kpasswd_principal, KRB5_NT_SRV_INST);
+
+	/*
+	 * For the kpasswd service, always ensure we get the latest kvno. This
+	 * also means we (correctly) refuse RODC-issued tickets.
+	 */
+	flags &= ~HDB_F_KVNO_SPECIFIED;
+
+	/* Don't bother looking up a client or krbtgt. */
+	flags &= ~(SDB_F_GET_CLIENT|SDB_F_GET_KRBTGT);
+
+	ret = hdb_samba4_fetch_kvno(context, db,
+				    kpasswd_principal,
+				    flags,
+				    0,
+				    entry);
+
+	krb5_free_principal(context, kpasswd_principal);
+	return ret;
+}
+
+static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
+					hdb_entry *entry)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	struct sdb_entry sentry = {};
+	krb5_error_code ret;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+
+	ret = samba_kdc_firstkey(context, kdc_db_ctx, &sentry);
+	switch (ret) {
+	case 0:
+		break;
+	case SDB_ERR_WRONG_REALM:
+		return HDB_ERR_WRONG_REALM;
+	case SDB_ERR_NOENTRY:
+		return HDB_ERR_NOENTRY;
+	case SDB_ERR_NOT_FOUND_HERE:
+		return HDB_ERR_NOT_FOUND_HERE;
+	default:
+		return ret;
+	}
+
+	ret = sdb_entry_to_hdb_entry(context, &sentry, entry);
+	sdb_entry_free(&sentry);
+	return ret;
+}
+
+static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
+				   hdb_entry *entry)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	struct sdb_entry sentry = {};
+	krb5_error_code ret;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+
+	ret = samba_kdc_nextkey(context, kdc_db_ctx, &sentry);
+	switch (ret) {
+	case 0:
+		break;
+	case SDB_ERR_WRONG_REALM:
+		return HDB_ERR_WRONG_REALM;
+	case SDB_ERR_NOENTRY:
+		return HDB_ERR_NOENTRY;
+	case SDB_ERR_NOT_FOUND_HERE:
+		return HDB_ERR_NOT_FOUND_HERE;
+	default:
+		return ret;
+	}
+
+	ret = sdb_entry_to_hdb_entry(context, &sentry, entry);
+	sdb_entry_free(&sentry);
+	return ret;
+}
+
+static krb5_error_code hdb_samba4_nextkey_panic(krb5_context context, HDB *db,
+						unsigned flags,
+						hdb_entry *entry)
+{
+	DBG_ERR("Attempt to iterate kpasswd keytab => PANIC\n");
+	smb_panic("hdb_samba4_nextkey_panic: Attempt to iterate kpasswd keytab");
+}
+
+static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
+{
+	talloc_free(db);
+	return 0;
+}
+
+static krb5_error_code
+hdb_samba4_check_constrained_delegation(krb5_context context, HDB *db,
+					hdb_entry *entry,
+					krb5_const_principal target_principal)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	struct samba_kdc_entry *skdc_entry;
+	krb5_error_code ret;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+	skdc_entry = talloc_get_type_abort(entry->context,
+					   struct samba_kdc_entry);
+
+	ret = samba_kdc_check_s4u2proxy(context, kdc_db_ctx,
+					skdc_entry,
+					target_principal);
+	switch (ret) {
+	case 0:
+		break;
+	case SDB_ERR_WRONG_REALM:
+		ret = HDB_ERR_WRONG_REALM;
+		break;
+	case SDB_ERR_NOENTRY:
+		ret = HDB_ERR_NOENTRY;
+		break;
+	case SDB_ERR_NOT_FOUND_HERE:
+		ret = HDB_ERR_NOT_FOUND_HERE;
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static krb5_error_code
+hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
+				     hdb_entry *entry,
+				     krb5_const_principal certificate_principal)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	struct samba_kdc_entry *skdc_entry;
+	krb5_error_code ret;
+
+	kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+					   struct samba_kdc_db_context);
+	skdc_entry = talloc_get_type_abort(entry->context,
+					   struct samba_kdc_entry);
+
+	ret = samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
+						  skdc_entry,
+						  certificate_principal);
+	switch (ret) {
+	case 0:
+		break;
+	case SDB_ERR_WRONG_REALM:
+		ret = HDB_ERR_WRONG_REALM;
+		break;
+	case SDB_ERR_NOENTRY:
+		ret = HDB_ERR_NOENTRY;
+		break;
+	case SDB_ERR_NOT_FOUND_HERE:
+		ret = HDB_ERR_NOT_FOUND_HERE;
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static krb5_error_code
+hdb_samba4_check_client_matches_target_service(krb5_context context, HDB *db,
+			  hdb_entry *client_entry,
+			  hdb_entry *server_target_entry)
+{
+	struct samba_kdc_entry *skdc_client_entry
+		= talloc_get_type_abort(client_entry->context,
+					struct samba_kdc_entry);
+	struct samba_kdc_entry *skdc_server_target_entry
+		= talloc_get_type_abort(server_target_entry->context,
+					struct samba_kdc_entry);
+
+	return samba_kdc_check_client_matches_target_service(context,
+							     skdc_client_entry,
+							     skdc_server_target_entry);
+}
+
+static void reset_bad_password_netlogon(TALLOC_CTX *mem_ctx,
+					struct samba_kdc_db_context *kdc_db_ctx,
+					struct netr_SendToSamBase *send_to_sam)
+{
+	struct dcerpc_binding_handle *irpc_handle;
+	struct winbind_SendToSam req;
+
+	irpc_handle = irpc_binding_handle_by_name(mem_ctx, kdc_db_ctx->msg_ctx,
+						  "winbind_server",
+						  &ndr_table_winbind);
+
+	if (irpc_handle == NULL) {
+		DEBUG(0, ("No winbind_server running!\n"));
+		return;
+	}
+
+	req.in.message = *send_to_sam;
+
+	dcerpc_winbind_SendToSam_r_send(mem_ctx, kdc_db_ctx->ev_ctx,
+					irpc_handle, &req);
+}
+
+static krb5_error_code hdb_samba4_audit(krb5_context context,
+					HDB *db,
+					hdb_entry *entry,
+					hdb_request_t r)
+{
+	struct samba_kdc_db_context *kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
+									struct samba_kdc_db_context);
+	struct ldb_dn *domain_dn = ldb_get_default_basedn(kdc_db_ctx->samdb);
+	uint64_t logon_id = generate_random_u64();
+	heim_object_t auth_details_obj = NULL;
+	const char *auth_details = NULL;
+	char *etype_str = NULL;
+	heim_object_t hdb_auth_status_obj = NULL;
+	int hdb_auth_status;
+	heim_object_t pa_type_obj = NULL;
+	const char *pa_type = NULL;
+	struct auth_usersupplied_info ui;
+	size_t sa_socklen = 0;
+	int final_ret = 0;
+
+	hdb_auth_status_obj = heim_audit_getkv((heim_svc_req_desc)r, KDC_REQUEST_KV_AUTH_EVENT);
+	if (hdb_auth_status_obj == NULL) {
+		/* No status code found, so just return. */
+		return 0;
+	}
+
+	hdb_auth_status = heim_number_get_int(hdb_auth_status_obj);
+
+	pa_type_obj = heim_audit_getkv((heim_svc_req_desc)r, "pa");
+	if (pa_type_obj != NULL) {
+		pa_type = heim_string_get_utf8(pa_type_obj);
+	}
+
+	auth_details_obj = heim_audit_getkv((heim_svc_req_desc)r, KDC_REQUEST_KV_PKINIT_CLIENT_CERT);
+	if (auth_details_obj != NULL) {
+		auth_details = heim_string_get_utf8(auth_details_obj);
+	} else {
+		auth_details_obj = heim_audit_getkv((heim_svc_req_desc)r, KDC_REQUEST_KV_GSS_INITIATOR);
+		if (auth_details_obj != NULL) {
+			auth_details = heim_string_get_utf8(auth_details_obj);
+		} else {
+			heim_object_t etype_obj = heim_audit_getkv((heim_svc_req_desc)r, KDC_REQUEST_KV_PA_ETYPE);
+			if (etype_obj != NULL) {
+				int etype = heim_number_get_int(etype_obj);
+
+				krb5_error_code ret = krb5_enctype_to_string(r->context, etype, &etype_str);
+				if (ret == 0) {
+					auth_details = etype_str;
+				} else {
+					auth_details = "unknown enctype";
+				}
+			}
+		}
+	}
+
+	/*
+	 * Forcing this via the NTLM auth structure is not ideal, but
+	 * it is the most practical option right now, and ensures the
+	 * logs are consistent, even if some elements are always NULL.
+	 */
+	ui = (struct auth_usersupplied_info) {
+		.was_mapped = true,
+		.client = {
+			.account_name = r->cname,
+			.domain_name = NULL,
+		},
+		.service_description = "Kerberos KDC",
+		.auth_description = "Unknown Auth Description",
+		.password_type = auth_details,
+		.logon_id = logon_id
+	};
+
+	switch (r->addr->sa_family) {
+	case AF_INET:
+		sa_socklen = sizeof(struct sockaddr_in);
+		break;
+#ifdef HAVE_IPV6
+	case AF_INET6:
+		sa_socklen = sizeof(struct sockaddr_in6);
+		break;
+#endif
+	}
+
+	switch (hdb_auth_status) {
+	default:
+	{
+		TALLOC_CTX *frame = talloc_stackframe();
+		struct samba_kdc_entry *p = talloc_get_type(entry->context,
+							    struct samba_kdc_entry);
+		struct dom_sid *sid
+			= samdb_result_dom_sid(frame, p->msg, "objectSid");
+		const char *account_name
+			= ldb_msg_find_attr_as_string(p->msg, "sAMAccountName", NULL);
+		const char *domain_name = lpcfg_sam_name(p->kdc_db_ctx->lp_ctx);
+		struct tsocket_address *remote_host;
+		const char *auth_description = NULL;
+		NTSTATUS status;
+		int ret;
+		bool rwdc_fallback = false;
+
+		ret = tsocket_address_bsd_from_sockaddr(frame, r->addr,
+							sa_socklen,
+							&remote_host);
+		if (ret != 0) {
+			ui.remote_host = NULL;
+		} else {
+			ui.remote_host = remote_host;
+		}
+
+		ui.mapped.account_name = account_name;
+		ui.mapped.domain_name = domain_name;
+
+		if (pa_type != NULL) {
+			auth_description = talloc_asprintf(frame,
+							   "%s Pre-authentication",
+							   pa_type);
+			if (auth_description == NULL) {
+				auth_description = pa_type;
+			}
+		} else {
+			auth_description = "Unknown Pre-authentication";
+		}
+		ui.auth_description = auth_description;
+
+		if (hdb_auth_status == KDC_AUTH_EVENT_CLIENT_AUTHORIZED) {
+			struct netr_SendToSamBase *send_to_sam = NULL;
+
+			/*
+			 * TODO: We could log the AS-REQ authorization success here as
+			 * well.  However before we do that, we need to pass
+			 * in the PAC here or re-calculate it.
+			 */
+			status = authsam_logon_success_accounting(kdc_db_ctx->samdb, p->msg,
+								  domain_dn, true, frame, &send_to_sam);
+			if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
+				final_ret = KRB5KDC_ERR_CLIENT_REVOKED;
+				r->error_code = final_ret;
+				rwdc_fallback = kdc_db_ctx->rodc;
+			} else if (!NT_STATUS_IS_OK(status)) {
+				final_ret = KRB5KRB_ERR_GENERIC;
+				r->error_code = final_ret;
+				rwdc_fallback = kdc_db_ctx->rodc;
+			} else if (kdc_db_ctx->rodc && send_to_sam != NULL) {
+				reset_bad_password_netlogon(frame, kdc_db_ctx, send_to_sam);
+			}
+
+			/* This is the final sucess */
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_VALIDATED_LONG_TERM_KEY) {
+			/*
+			 * This was only a pre-authentication success,
+			 * but we didn't reach the final
+			 * KDC_AUTH_EVENT_CLIENT_AUTHORIZED,
+			 * so consult the error code.
+			 */
+			if (r->error_code == 0) {
+				DBG_ERR("ERROR: VALIDATED_LONG_TERM_KEY "
+					"with error=0 => INTERNAL_ERROR\n");
+				status = NT_STATUS_INTERNAL_ERROR;
+				final_ret = KRB5KRB_ERR_GENERIC;
+				r->error_code = final_ret;
+			} else if (!NT_STATUS_IS_OK(p->reject_status)) {
+				status = p->reject_status;
+			} else {
+				status = krb5_to_nt_status(r->error_code);
+			}
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_PREAUTH_SUCCEEDED) {
+			/*
+			 * This was only a pre-authentication success,
+			 * but we didn't reach the final
+			 * KDC_AUTH_EVENT_CLIENT_AUTHORIZED,
+			 * so consult the error code.
+			 */
+			if (r->error_code == 0) {
+				DBG_ERR("ERROR: PREAUTH_SUCCEEDED "
+					"with error=0 => INTERNAL_ERROR\n");
+				status = NT_STATUS_INTERNAL_ERROR;
+				final_ret = KRB5KRB_ERR_GENERIC;
+				r->error_code = final_ret;
+			} else if (!NT_STATUS_IS_OK(p->reject_status)) {
+				status = p->reject_status;
+			} else {
+				status = krb5_to_nt_status(r->error_code);
+			}
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_CLIENT_TIME_SKEW) {
+			status = NT_STATUS_TIME_DIFFERENCE_AT_DC;
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_WRONG_LONG_TERM_KEY) {
+			status = authsam_update_bad_pwd_count(kdc_db_ctx->samdb, p->msg, domain_dn);
+			if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
+				final_ret = KRB5KDC_ERR_CLIENT_REVOKED;
+				r->error_code = final_ret;
+			} else {
+				status = NT_STATUS_WRONG_PASSWORD;
+			}
+			rwdc_fallback = kdc_db_ctx->rodc;
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_CLIENT_LOCKED_OUT) {
+			status = NT_STATUS_ACCOUNT_LOCKED_OUT;
+			rwdc_fallback = kdc_db_ctx->rodc;
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_CLIENT_NAME_UNAUTHORIZED) {
+			if (pa_type != NULL && strncmp(pa_type, "PK-INIT", strlen("PK-INIT")) == 0) {
+				status = NT_STATUS_PKINIT_NAME_MISMATCH;
+			} else {
+				status = NT_STATUS_ACCOUNT_RESTRICTION;
+			}
+			rwdc_fallback = kdc_db_ctx->rodc;
+		} else if (hdb_auth_status == KDC_AUTH_EVENT_PREAUTH_FAILED) {
+			if (pa_type != NULL && strncmp(pa_type, "PK-INIT", strlen("PK-INIT")) == 0) {
+				status = NT_STATUS_PKINIT_FAILURE;
+			} else {
+				status = NT_STATUS_GENERIC_COMMAND_FAILED;
+			}
+			rwdc_fallback = kdc_db_ctx->rodc;
+		} else {
+			DBG_ERR("Unhandled hdb_auth_status=%d => INTERNAL_ERROR\n",
+				hdb_auth_status);
+			status = NT_STATUS_INTERNAL_ERROR;
+			final_ret = KRB5KRB_ERR_GENERIC;
+			r->error_code = final_ret;
+		}
+
+		if (rwdc_fallback) {
+			/*
+			 * Forward the request to an RWDC in order
+			 * to give an authoritative answer to the client.
+			 */
+			auth_description = talloc_asprintf(frame,
+							   "%s,Forward-To-RWDC",
+							   ui.auth_description);
+			if (auth_description != NULL) {
+				ui.auth_description = auth_description;
+			}
+			final_ret = HDB_ERR_NOT_FOUND_HERE;
+		}
+
+		log_authentication_event(kdc_db_ctx->msg_ctx,
+					 kdc_db_ctx->lp_ctx,
+					 &r->tv_start,
+					 &ui,
+					 status,
+					 domain_name,
+					 account_name,
+					 sid);
+		if (final_ret == KRB5KRB_ERR_GENERIC && socket_wrapper_enabled()) {
+			/*
+			 * If we're running under make test
+			 * just panic
+			 */
+			DBG_ERR("Unexpected situation => PANIC\n");
+			smb_panic("hdb_samba4_audit: Unexpected situation");
+		}
+		TALLOC_FREE(frame);
+		break;
+	}
+	case KDC_AUTH_EVENT_CLIENT_UNKNOWN:
+	{
+		struct tsocket_address *remote_host;
+		int ret;
+		TALLOC_CTX *frame = talloc_stackframe();
+		ret = tsocket_address_bsd_from_sockaddr(frame, r->addr,
+							sa_socklen,
+							&remote_host);
+		if (ret != 0) {
+			ui.remote_host = NULL;
+		} else {
+			ui.remote_host = remote_host;
+		}
+
+		if (pa_type == NULL) {
+			pa_type = "AS-REQ";
+		}
+
+		ui.auth_description = pa_type;
+
+		/* Note this is not forwarded to an RWDC */
+
+		log_authentication_event(kdc_db_ctx->msg_ctx,
+					 kdc_db_ctx->lp_ctx,
+					 &r->tv_start,
+					 &ui,
+					 NT_STATUS_NO_SUCH_USER,
+					 NULL, NULL,
+					 NULL);
+		TALLOC_FREE(frame);
+		break;
+	}
+	}
+
+	free(etype_str);
+
+	return final_ret;
+}
+
+/* This interface is to be called by the KDC and libnet_keytab_dump,
+ * which is expecting Samba calling conventions.
+ * It is also called by a wrapper (hdb_samba4_create) from the
+ * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
+
+NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
+			       krb5_context context, struct HDB **db)
+{
+	struct samba_kdc_db_context *kdc_db_ctx;
+	NTSTATUS nt_status;
+
+	if (hdb_interface_version != HDB_INTERFACE_VERSION) {
+		krb5_set_error_message(context, EINVAL, "Heimdal HDB interface version mismatch between build-time and run-time libraries!");
+		return NT_STATUS_ERROR_DS_INCOMPATIBLE_VERSION;
+	}
+
+	*db = talloc_zero(base_ctx, HDB);
+	if (!*db) {
+		krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	(*db)->hdb_master_key_set = 0;
+	(*db)->hdb_db = NULL;
+	(*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
+
+	nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(*db);
+		return nt_status;
+	}
+	(*db)->hdb_db = kdc_db_ctx;
+
+	(*db)->hdb_dbc = NULL;
+	(*db)->hdb_open = hdb_samba4_open;
+	(*db)->hdb_close = hdb_samba4_close;
+	(*db)->hdb_free_entry_context = hdb_samba4_free_entry_context;
+	(*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
+	(*db)->hdb_store = hdb_samba4_store;
+	(*db)->hdb_firstkey = hdb_samba4_firstkey;
+	(*db)->hdb_nextkey = hdb_samba4_nextkey;
+	(*db)->hdb_lock = hdb_samba4_lock;
+	(*db)->hdb_unlock = hdb_samba4_unlock;
+	(*db)->hdb_set_sync = hdb_samba4_set_sync;
+	(*db)->hdb_rename = hdb_samba4_rename;
+	/* we don't implement these, as we are not a lockable database */
+	(*db)->hdb__get = NULL;
+	(*db)->hdb__put = NULL;
+	/* kadmin should not be used for deletes - use other tools instead */
+	(*db)->hdb__del = NULL;
+	(*db)->hdb_destroy = hdb_samba4_destroy;
+
+	(*db)->hdb_audit = hdb_samba4_audit;
+	(*db)->hdb_check_constrained_delegation = hdb_samba4_check_constrained_delegation;
+	(*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
+	(*db)->hdb_check_client_matches_target_service = hdb_samba4_check_client_matches_target_service;
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS hdb_samba4_kpasswd_create_kdc(struct samba_kdc_base_context *base_ctx,
+				       krb5_context context, struct HDB **db)
+{
+	NTSTATUS nt_status;
+
+	nt_status = hdb_samba4_create_kdc(base_ctx, context, db);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	(*db)->hdb_fetch_kvno = hdb_samba4_kpasswd_fetch_kvno;
+	(*db)->hdb_firstkey = hdb_samba4_nextkey_panic;
+	(*db)->hdb_nextkey = hdb_samba4_nextkey_panic;
+
+	return NT_STATUS_OK;
+}