Add ads convenience functions to samba 4. Move gpo_ldap.c to root libgpo.

Signed-off-by: Günther Deschner <gd@samba.org>

2 files changed, 309 insertions, 0 deletions

diff --git a/source4/libgpo/ads_convenience.c b/source4/libgpo/ads_convenience.c
new file mode 100644
index 0000000000..1c64197b3d
--- /dev/null
+++ b/source4/libgpo/ads_convenience.c
@@ -0,0 +1,248 @@
+/*
+   Samba CIFS implementation
+   ADS convenience functions for GPO
+
+   Copyright (C) 2001 Andrew Tridgell (from samba3 ads.c)
+   Copyright (C) 2001 Remus Koos (from samba3 ads.c)
+   Copyright (C) 2001 Andrew Bartlett (from samba3 ads.c)
+   Copyright (C) 2008 Jelmer Vernooij, jelmer@samba.org
+   Copyright (C) 2008 Wilco Baan Hofman, wilco@baanhofman.nl
+
+   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 "libnet/libnet.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "libgpo/source/ads_convenience.h"
+
+WERROR ads_startup (struct libnet_context *netctx, ADS_STRUCT **ads)
+{
+	*ads = talloc(netctx, ADS_STRUCT);
+	*ads->netctx = netctx;
+
+	ads_connect(*ads);
+
+	return WERR_OK;
+}
+
+ADS_STATUS ads_connect(ADS_STRUCT *ads)
+{
+	struct libnet_lookup_DCs *io;
+	char *url;
+
+	io = talloc_zero(ads, struct libnet_lookup_DCs);
+
+	/* We are looking for the PDC of the active domain. */
+	io->in.name_type = NBT_NAME_PDC;
+	io->in.domain_name = lp_workgroup(ads->netctx->lp_ctx);
+	libnet_lookupDCs(ads->netctx, ads, io);
+
+	url = talloc_asprintf(ads, "ldap://%s", io->out.dcs[0]);
+	ads->ldbctx = ldb_wrap_connect(ads, ads->netctx->event_ctx, ads->netctx->lp_ctx,
+	                 url, NULL, ads->netctx->cred, 0, NULL);
+	if (ads->ldbctx == NULL) {
+		return ADS_STATUS_NT(NT_STATUS_UNSUCCESSFUL);
+	}
+
+	return ADS_STATUS_NT(NT_STATUS_OK);
+}
+
+ADS_STATUS ads_search_dn(ADS_STRUCT *ads, LDAPMessage **res,
+                         const char *dn, const char **attrs)
+{
+	ADS_STATUS status;
+
+	status.err_state = ldb_search(ads->ldbctx, ads, res,
+	                              ldb_dn_new(ads, ads->ldbctx, dn),
+	                              LDB_SCOPE_BASE,
+                                      attrs,
+	                              "(objectclass=*)");
+
+	status.error_type = ENUM_ADS_ERROR_LDAP;
+	return status;
+}
+
+const char * ads_get_dn(ADS_STRUCT *ads, LDAPMessage *res)
+{
+	return ldb_dn_get_linearized(res->msgs[0]->dn);
+}
+
+bool ads_pull_sd(ADS_STRUCT *ads, TALLOC_CTX *ctx, LDAPMessage *res, const char *field, struct security_descriptor **sd)
+{
+	struct ldb_val *val;
+	struct ndr_err_code ndr_err;
+
+	val = ldb_msg_find_ldb_val(res->msgs[0], field);
+
+        *sd = talloc(ctx, struct security_descriptor);
+        if (*sd == NULL) {
+                return -1;
+        }
+        /* We can't use ndr_pull_struct_blob_all because this contains relative pointers */
+        ndr_err = ndr_pull_struct_blob(val, *sd, NULL, *sd,
+                                           (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+        if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+                talloc_free(*sd);
+                return -1;
+        }
+	return 0;
+}
+
+ADS_STATUS ads_search_retry_dn_sd_flags(ADS_STRUCT *ads, LDAPMessage **res, uint32_t sd_flags,
+                                        const char *dn, const char **attrs)
+{
+	return ads_search_sd_flags(ads, dn, LDB_SCOPE_BASE, "(objectclass=*)", attrs, sd_flags, res);
+}
+
+static ADS_STATUS ads_do_search_all_sd_flags (ADS_STRUCT *ads, const char *dn, int scope,
+                                              const char *filter, const char **attrs,
+                                              uint32_t sd_flags, LDAPMessage **res)
+{
+	int count = 3;
+	int rv;
+	struct ldb_request *req;
+	struct ldb_control **controls;
+	struct ldb_parse_tree *tree;
+
+	controls = talloc_zero_array(ads, struct ldb_control *, 2);
+	controls[0] = talloc(ads, struct ldb_control);
+	controls[0]->oid = LDB_CONTROL_SD_FLAGS_OID;
+	controls[0]->data = &sd_flags;
+	controls[0]->critical = 1;
+
+	tree = ldb_parse_tree(ads, filter);
+
+	rv = ldb_build_search_req_ex(&req, ads->ldbctx, ads, res, dn, scope, tree, attrs, controls,
+	                             res, ldb_search_default_callback, NULL);
+	if (rv != LDB_SUCCESS) {
+		talloc_free(*res);
+		talloc_free(req);
+		talloc_free(tree);
+		return ADS_STATUS(irv);
+	}
+	rv = ldb_request(ads->ldbctx, req);
+	if (rv == LDB_SUCCESS) {
+		rv = ldb_wait(req->handle, LDB_WAIT_ALL);
+	}
+
+	talloc_free(req);
+	talloc_free(tree);
+	return ADS_STATUS(rv);
+
+}
+
+const char * ads_pull_string(ADS_STRUCT *ads, TALLOC_CTX *ctx, LDAPMessage *res, const char *field)
+{
+	return ldb_msg_find_attr_as_string(res->msgs[0], field, NULL);
+}
+
+bool ads_pull_uint32(ADS_STRUCT *ads, LDAPMessage *res, const char *field, uint32_t *ret)
+{
+	if (ldb_msg_find_element(res->msgs[0], field) == NULL) {
+		return false;
+	}
+	*ret = ldb_msg_find_attr_as_uint(res->msgs[0], field, 0);
+	return true;
+}
+
+
+int ads_count_replies(ADS_STRUCT *ads, LDAPMessage *res)
+{
+	return res->count;
+}
+
+ADS_STATUS ads_msgfree(ADS_STRUCT *ads, LDAPMessage *res)
+{
+	talloc_free(res);
+}
+
+/*
+  do a rough conversion between ads error codes and NT status codes
+  we'll need to fill this in more
+*/
+NTSTATUS ads_ntstatus(ADS_STATUS status)
+{
+	switch (status.error_type) {
+	case ENUM_ADS_ERROR_NT:
+		return status.err.nt_status;
+	case ENUM_ADS_ERROR_SYSTEM:
+		return map_nt_error_from_unix(status.err.rc);
+	case ENUM_ADS_ERROR_LDAP:
+		if (status.err.rc == LDB_SUCCESS) {
+			return NT_STATUS_OK;
+		}
+		return NT_STATUS_UNSUCCESSFUL;
+	default:
+		break;
+	}
+
+	if (ADS_ERR_OK(status)) {
+		return NT_STATUS_OK;
+	}
+	return NT_STATUS_UNSUCCESSFUL;
+}
+
+/*
+  return a string for an error from an ads routine
+*/
+const char *ads_errstr(ADS_STATUS status)
+{
+	switch (status.error_type) {
+	case ENUM_ADS_ERROR_SYSTEM:
+		return strerror(status.err.rc);
+	case ENUM_ADS_ERROR_LDAP:
+		return msg;
+	case ENUM_ADS_ERROR_NT:
+		return get_friendly_nt_error_msg(ads_ntstatus(status));
+	default:
+		return "Unknown ADS error type!? (not compiled in?)";
+	}
+}
+
+ADS_STATUS ads_build_ldap_error(int ldb_error)
+{
+	ADS_STATUS ret;
+	ret.err.rc = ldb_error;
+	ret.error_type = ENUM_ADS_ERROR_LDAP;
+	return ret;
+}
+
+ADS_STATUS ads_build_nt_error(NTSTATUS nt_status)
+{
+	ADS_STATUS ret;
+	ret.err.nt_status = nt_status;
+	ret.error_type = ENUM_ADS_ERROR_NT;
+	return ret;
+}
+
+/*
+  FIXME
+  Stub write functions, these do not do anything, though they should. -- Wilco
+*/
+
+ADS_MODLIST ads_init_mods(TALLOC_CTX *ctx)
+{
+	return NULL;
+}
+
+ADS_STATUS ads_mod_str(TALLOC_CTX *ctx, ADS_MODLIST *mods, const char *name, const char *val)
+{
+	return ADS_ERROR_NT(NT_STATUS_NOT_IMPLEMENTED);
+}
+
+ADS_STATUS ads_gen_mod(ADS_STRUCT *ads, const char *mod_dn, ADS_MODLIST mods)
+{
+	return ADS_ERROR_NT(NT_STATUS_NOT_IMPLEMENTED);
+}
diff --git a/source4/libgpo/ads_convenience.h b/source4/libgpo/ads_convenience.h
new file mode 100644
index 0000000000..13bd54b588
--- /dev/null
+++ b/source4/libgpo/ads_convenience.h
@@ -0,0 +1,61 @@
+/*
+   Samba CIFS implementation
+   ADS convenience functions for GPO
+
+   Copyright (C) 2008 Jelmer Vernooij, jelmer@samba.org
+   Copyright (C) 2008 Wilco Baan Hofman, wilco@baanhofman.nl
+
+   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/>.
+*/
+
+#ifndef __ADS_CONVENIENCE_H__
+#define __ADS_CONVENIENCE_H__
+
+#define ADS_ERR_OK(status) ((status.error_type == ENUM_ADS_ERROR_NT) ? NT_STATUS_IS_OK(status.err.nt_status):(status.err.rc == 0))
+#define ADS_ERROR(rc) ads_build_ldap_error(rc)
+#define ADS_ERROR_NT(rc) ads_build_nt_error(rc)
+#define ADS_ERROR_HAVE_NO_MEMORY(x) do { \
+        if (!(x)) {\
+                return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);\
+        }\
+} while (0)
+
+#define LDAP_SCOPE_BASE		LDB_SCOPE_BASE
+#define LDAP_SCOPE_SUBTREE	LDB_SCOPE_SUBTREE
+#define LDAP_SCOPE_ONELEVEL	LDB_SCOPE_ONELEVEL
+
+
+
+
+typedef struct {
+	struct libnet_context *netctx;
+	struct ldb_context *ldbctx;
+} ADS_STRUCT;
+
+typedef struct ldb_result LDAPMessage;
+typedef struct void ** ADS_MODLIST;
+
+/* there are 3 possible types of errors the ads subsystem can produce */
+enum ads_error_type { ENUM_ADS_ERROR_LDAP, ENUM_ADS_ERROR_SYSTEM, ENUM_ADS_ERROR_NT};
+
+typedef struct {
+	enum ads_error_type error_type;
+	union err_state{
+		int rc;
+		NTSTATUS nt_status;
+	} err;
+	int minor_status;
+} ADS_STATUS;
+
+#endif