s4:windc move windc plugin in its own file

Keep all heimdal related plugin code within wdc-samba4.c
Leave only interfaces common to multiple plugins in pac-glue.c

1 files changed, 212 insertions, 0 deletions

diff --git a/source4/kdc/wdc-samba4.c b/source4/kdc/wdc-samba4.c
new file mode 100644
index 0000000000..2ff266e4f4
--- /dev/null
+++ b/source4/kdc/wdc-samba4.c
@@ -0,0 +1,212 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   PAC Glue between Samba and the KDC
+
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
+   Copyright (C) Simo Sorce <idra@samba.org> 2010
+
+   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 "../libds/common/flags.h"
+#include "auth/auth.h"
+#include "kdc/kdc.h"
+#include "param/param.h"
+#include "kdc/pac-glue.h"
+
+/* Given the right private pointer from hdb_samba4, get a PAC from the attached ldb messages */
+static krb5_error_code samba_wdc_get_pac(void *priv, krb5_context context,
+					 struct hdb_entry_ex *client,
+					 krb5_pac *pac)
+{
+	TALLOC_CTX *mem_ctx;
+	DATA_BLOB *pac_blob;
+	krb5_error_code ret;
+	NTSTATUS nt_status;
+
+	mem_ctx = talloc_named(client->ctx, 0, "samba_get_pac context");
+	if (!mem_ctx) {
+		return ENOMEM;
+	}
+
+	nt_status = samba_kdc_get_pac_blob(mem_ctx, client, &pac_blob);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(mem_ctx);
+		return EINVAL;
+	}
+
+	ret = samba_make_krb5_pac(context, pac_blob, pac);
+
+	talloc_free(mem_ctx);
+	return ret;
+}
+
+/* Resign (and reform, including possibly new groups) a PAC */
+
+static krb5_error_code samba_wdc_reget_pac(void *priv, krb5_context context,
+					   const krb5_principal client_principal,
+					   struct hdb_entry_ex *client,
+					   struct hdb_entry_ex *server, krb5_pac *pac)
+{
+	struct hdb_samba4_private *p = talloc_get_type(server->ctx, struct hdb_samba4_private);
+	TALLOC_CTX *mem_ctx = talloc_named(p, 0, "samba_kdc_reget_pac context");
+	DATA_BLOB *pac_blob;
+	krb5_error_code ret;
+	NTSTATUS nt_status;
+
+	if (!mem_ctx) {
+		return ENOMEM;
+	}
+
+	pac_blob = talloc_zero(mem_ctx, DATA_BLOB);
+	if (!pac_blob) {
+		talloc_free(mem_ctx);
+		return ENOMEM;
+	}
+
+	/* The user account may be set not to want the PAC */
+	if (!samba_princ_needs_pac(server)) {
+		talloc_free(mem_ctx);
+		return EINVAL;
+	}
+
+	nt_status = samba_kdc_update_pac_blob(mem_ctx, context,
+					      p->iconv_convenience,
+					      pac, pac_blob);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(0, ("Building PAC failed: %s\n",
+			  nt_errstr(nt_status)));
+		talloc_free(mem_ctx);
+		return EINVAL;
+	}
+
+	/* We now completly regenerate this pac */
+	krb5_pac_free(context, *pac);
+
+	ret = samba_make_krb5_pac(context, pac_blob, pac);
+
+	talloc_free(mem_ctx);
+	return ret;
+}
+
+/* Given an hdb entry (and in particular it's private member), consult
+ * the account_ok routine in auth/auth_sam.c for consistancy */
+static krb5_error_code samba_wdc_check_client_access(void *priv,
+						     krb5_context context,
+						     krb5_kdc_configuration *config,
+						     hdb_entry_ex *client_ex, const char *client_name,
+						     hdb_entry_ex *server_ex, const char *server_name,
+						     KDC_REQ *req,
+						     krb5_data *e_data)
+{
+	krb5_error_code ret;
+	NTSTATUS nt_status;
+	TALLOC_CTX *tmp_ctx;
+	struct hdb_samba4_private *p;
+	char *workstation = NULL;
+	HostAddresses *addresses = req->req_body.addresses;
+	int i;
+	bool password_change;
+
+	tmp_ctx = talloc_new(client_ex->ctx);
+	p = talloc_get_type(client_ex->ctx, struct hdb_samba4_private);
+
+	if (!tmp_ctx) {
+		return ENOMEM;
+	}
+
+	if (addresses) {
+		for (i=0; i < addresses->len; i++) {
+			if (addresses->val->addr_type == KRB5_ADDRESS_NETBIOS) {
+				workstation = talloc_strndup(tmp_ctx, addresses->val->address.data, MIN(addresses->val->address.length, 15));
+				if (workstation) {
+					break;
+				}
+			}
+		}
+	}
+
+	/* Strip space padding */
+	if (workstation) {
+		i = MIN(strlen(workstation), 15);
+		for (; i > 0 && workstation[i - 1] == ' '; i--) {
+			workstation[i - 1] = '\0';
+		}
+	}
+
+	password_change = (server_ex && server_ex->entry.flags.change_pw);
+
+	/* we allow all kinds of trusts here */
+	nt_status = authsam_account_ok(tmp_ctx,
+				       p->samdb,
+				       MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
+				       p->realm_dn,
+				       p->msg,
+				       workstation,
+				       client_name, true, password_change);
+
+	if (NT_STATUS_IS_OK(nt_status)) {
+		/* Now do the standard Heimdal check */
+		ret = kdc_check_flags(context, config,
+				      client_ex, client_name,
+				      server_ex, server_name,
+				      req->msg_type == krb_as_req);
+	} else {
+		if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_MUST_CHANGE))
+			ret = KRB5KDC_ERR_KEY_EXPIRED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_EXPIRED))
+			ret = KRB5KDC_ERR_KEY_EXPIRED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_EXPIRED))
+			ret = KRB5KDC_ERR_CLIENT_REVOKED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_DISABLED))
+			ret = KRB5KDC_ERR_CLIENT_REVOKED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_LOGON_HOURS))
+			ret = KRB5KDC_ERR_CLIENT_REVOKED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_LOCKED_OUT))
+			ret = KRB5KDC_ERR_CLIENT_REVOKED;
+		else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_WORKSTATION))
+			ret = KRB5KDC_ERR_POLICY;
+		else
+			ret = KRB5KDC_ERR_POLICY;
+
+		samba_kdc_build_edata_reply(tmp_ctx, e_data, nt_status);
+	}
+
+	return ret;
+}
+
+static krb5_error_code samba_wdc_plugin_init(krb5_context context, void **ptr)
+{
+	*ptr = NULL;
+	return 0;
+}
+
+static void samba_wdc_plugin_fini(void *ptr)
+{
+	return;
+}
+
+struct krb5plugin_windc_ftable windc_plugin_table = {
+	.minor_version = KRB5_WINDC_PLUGING_MINOR,
+	.init = samba_wdc_plugin_init,
+	.fini = samba_wdc_plugin_fini,
+	.pac_generate = samba_wdc_get_pac,
+	.pac_verify = samba_wdc_reget_pac,
+	.client_access = samba_wdc_check_client_access,
+};
+
+