Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 237 insertions, 0 deletions

diff --git a/source4/rpc_server/drsuapi/drsutil.c b/source4/rpc_server/drsuapi/drsutil.c
new file mode 100644
index 0000000..48423bb
--- /dev/null
+++ b/source4/rpc_server/drsuapi/drsutil.c
@@ -0,0 +1,237 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   useful utilities for the DRS server
+
+   Copyright (C) Andrew Tridgell 2009
+   
+   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 "rpc_server/dcerpc_server.h"
+#include "dsdb/samdb/samdb.h"
+#include "libcli/security/security.h"
+#include "libcli/security/session.h"
+#include "param/param.h"
+#include "auth/session.h"
+#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS            DBGC_DRS_REPL
+
+int drsuapi_search_with_extended_dn(struct ldb_context *ldb,
+				    TALLOC_CTX *mem_ctx,
+				    struct ldb_result **_res,
+				    struct ldb_dn *basedn,
+				    enum ldb_scope scope,
+				    const char * const *attrs,
+				    const char *filter)
+{
+	int ret;
+	struct ldb_request *req;
+	TALLOC_CTX *tmp_ctx;
+	struct ldb_result *res;
+
+	tmp_ctx = talloc_new(mem_ctx);
+
+	res = talloc_zero(tmp_ctx, struct ldb_result);
+	if (!res) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ret = ldb_build_search_req(&req, ldb, tmp_ctx,
+				   basedn,
+				   scope,
+				   filter,
+				   attrs,
+				   NULL,
+				   res,
+				   ldb_search_default_callback,
+				   NULL);
+	if (ret != LDB_SUCCESS) {
+		talloc_free(tmp_ctx);
+		return ret;
+	}
+
+	ret = ldb_request_add_control(req, LDB_CONTROL_EXTENDED_DN_OID, true, NULL);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	ret = ldb_request_add_control(req, LDB_CONTROL_SHOW_RECYCLED_OID, true, NULL);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	ret = ldb_request_add_control(req, LDB_CONTROL_REVEAL_INTERNALS, false, NULL);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	ret = ldb_request(ldb, req);
+	if (ret == LDB_SUCCESS) {
+		ret = ldb_wait(req->handle, LDB_WAIT_ALL);
+	}
+
+	talloc_free(req);
+	*_res = talloc_steal(mem_ctx, res);
+	return ret;
+}
+
+WERROR drs_security_level_check(struct dcesrv_call_state *dce_call,
+				const char* call,
+				enum security_user_level minimum_level,
+				const struct dom_sid *domain_sid)
+{
+	struct auth_session_info *session_info =
+		dcesrv_call_session_info(dce_call);
+	enum security_user_level level;
+
+	if (lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL,
+			 "drs", "disable_sec_check", false)) {
+		return WERR_OK;
+	}
+
+	level = security_session_user_level(session_info, domain_sid);
+	if (level < minimum_level) {
+		if (call) {
+			DEBUG(0,("%s refused for security token (level=%u)\n",
+				 call, (unsigned)level));
+			security_token_debug(DBGC_DRS_REPL, 2, session_info->security_token);
+		}
+		return WERR_DS_DRA_ACCESS_DENIED;
+	}
+
+	return WERR_OK;
+}
+
+void drsuapi_process_secret_attribute(struct drsuapi_DsReplicaAttribute *attr,
+				      struct drsuapi_DsReplicaMetaData *meta_data)
+{
+	if (attr->value_ctr.num_values == 0) {
+		return;
+	}
+
+	switch (attr->attid) {
+	case DRSUAPI_ATTID_dBCSPwd:
+	case DRSUAPI_ATTID_unicodePwd:
+	case DRSUAPI_ATTID_ntPwdHistory:
+	case DRSUAPI_ATTID_lmPwdHistory:
+	case DRSUAPI_ATTID_supplementalCredentials:
+	case DRSUAPI_ATTID_priorValue:
+	case DRSUAPI_ATTID_currentValue:
+	case DRSUAPI_ATTID_trustAuthOutgoing:
+	case DRSUAPI_ATTID_trustAuthIncoming:
+	case DRSUAPI_ATTID_initialAuthOutgoing:
+	case DRSUAPI_ATTID_initialAuthIncoming:
+		/*set value to null*/
+		attr->value_ctr.num_values = 0;
+		talloc_free(attr->value_ctr.values);
+		attr->value_ctr.values = NULL;
+		meta_data->originating_change_time = 0;
+		return;
+	default:
+		return;
+	}
+}
+
+
+/*
+  check security on a DN, with logging of errors
+ */
+static WERROR drs_security_access_check_log(struct ldb_context *sam_ctx,
+					    TALLOC_CTX *mem_ctx,
+					    struct security_token *token,
+					    struct ldb_dn *dn,
+					    const char *ext_right)
+{
+	int ret;
+	if (!dn) {
+		DEBUG(3,("drs_security_access_check: Null dn provided, access is denied for %s\n",
+			      ext_right));
+		return WERR_DS_DRA_ACCESS_DENIED;
+	}
+	ret = dsdb_check_access_on_dn(sam_ctx,
+				      mem_ctx,
+				      dn,
+				      token,
+				      SEC_ADS_CONTROL_ACCESS,
+				      ext_right);
+	if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
+		DEBUG(3,("%s refused for security token on %s\n",
+			 ext_right, ldb_dn_get_linearized(dn)));
+		security_token_debug(DBGC_DRS_REPL, 3, token);
+		return WERR_DS_DRA_ACCESS_DENIED;
+	} else if (ret != LDB_SUCCESS) {
+		DEBUG(1,("Failed to perform access check on %s: %s\n", ldb_dn_get_linearized(dn), ldb_strerror(ret)));
+		return WERR_DS_DRA_INTERNAL_ERROR;
+	}
+	return WERR_OK;
+}
+
+
+/*
+  check security on a object identifier
+ */
+WERROR drs_security_access_check(struct ldb_context *sam_ctx,
+				 TALLOC_CTX *mem_ctx,
+				 struct security_token *token,
+				 struct drsuapi_DsReplicaObjectIdentifier *nc,
+				 const char *ext_right)
+{
+	struct ldb_dn *dn;
+	WERROR werr;
+	int ret;
+
+	ret = drs_ObjectIdentifier_to_dn_and_nc_root(mem_ctx,
+						     sam_ctx,
+						     nc,
+						     &dn,
+						     NULL);
+	if (ret != LDB_SUCCESS) {
+		return WERR_DS_DRA_BAD_DN;
+	}
+
+	werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, dn, ext_right);
+	talloc_free(dn);
+	return werr;
+}
+
+/*
+  check security on the NC root of a object identifier
+ */
+WERROR drs_security_access_check_nc_root(struct ldb_context *sam_ctx,
+					 TALLOC_CTX *mem_ctx,
+					 struct security_token *token,
+					 struct drsuapi_DsReplicaObjectIdentifier *nc,
+					 const char *ext_right)
+{
+	struct ldb_dn *nc_root;
+	WERROR werr;
+	int ret;
+
+	ret = drs_ObjectIdentifier_to_dn_and_nc_root(mem_ctx,
+						     sam_ctx,
+						     nc,
+						     NULL,
+						     &nc_root);
+	if (ret != LDB_SUCCESS) {
+		return WERR_DS_DRA_BAD_NC;
+	}
+
+	werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, nc_root, ext_right);
+	talloc_free(nc_root);
+	return werr;
+}