1 files changed, 293 insertions, 0 deletions
diff --git a/source4/rpc_server/lsa/lsa_init.c b/source4/rpc_server/lsa/lsa_init.c
new file mode 100644
index 0000000..1065cc3
--- /dev/null
+++ b/source4/rpc_server/lsa/lsa_init.c
@@ -0,0 +1,293 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   endpoint server for the lsarpc pipe
+
+   Copyright (C) Andrew Tridgell 2004
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2007
+   
+   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 "rpc_server/lsa/lsa.h"
+
+/*
+ * This matches a Windows 2012R2 dc in
+ * a domain with function level 2012R2.
+ */
+#define DCESRV_LSA_POLICY_SD_SDDL \
+	"O:BAG:SY" \
+	"D:" \
+	"(D;;0x00000800;;;AN)" \
+	"(A;;0x000f1fff;;;BA)" \
+	"(A;;0x00020801;;;WD)" \
+	"(A;;0x00000801;;;AN)" \
+	"(A;;0x00001000;;;LS)" \
+	"(A;;0x00001000;;;NS)" \
+	"(A;;0x00001000;;;S-1-5-17)" \
+	"(A;;0x00000801;;;AC)" \
+	"(A;;0x00000801;;;S-1-15-2-2)"
+
+static const struct generic_mapping dcesrv_lsa_policy_mapping = {
+	LSA_POLICY_READ,
+	LSA_POLICY_WRITE,
+	LSA_POLICY_EXECUTE,
+	LSA_POLICY_ALL_ACCESS
+};
+
+NTSTATUS dcesrv_lsa_get_policy_state(struct dcesrv_call_state *dce_call,
+				     TALLOC_CTX *mem_ctx,
+				     uint32_t access_desired,
+				     struct lsa_policy_state **_state)
+{
+	struct auth_session_info *session_info =
+		dcesrv_call_session_info(dce_call);
+	enum security_user_level security_level;
+	struct lsa_policy_state *state;
+	struct ldb_result *dom_res;
+	const char *dom_attrs[] = {
+		"objectSid", 
+		"objectGUID", 
+		"nTMixedDomain",
+		"fSMORoleOwner",
+		NULL
+	};
+	char *p;
+	int ret;
+
+	state = talloc_zero(mem_ctx, struct lsa_policy_state);
+	if (!state) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* make sure the sam database is accessible */
+	state->sam_ldb = dcesrv_samdb_connect_as_user(state, dce_call);
+	if (state->sam_ldb == NULL) {
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+
+	/* and the privilege database */
+	state->pdb = privilege_connect(state, dce_call->conn->dce_ctx->lp_ctx);
+	if (state->pdb == NULL) {
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+
+	/* work out the domain_dn - useful for so many calls its worth
+	   fetching here */
+	state->domain_dn = ldb_get_default_basedn(state->sam_ldb);
+	if (!state->domain_dn) {
+		return NT_STATUS_NO_MEMORY;		
+	}
+
+	/* work out the forest root_dn - useful for so many calls its worth
+	   fetching here */
+	state->forest_dn = ldb_get_root_basedn(state->sam_ldb);
+	if (!state->forest_dn) {
+		return NT_STATUS_NO_MEMORY;		
+	}
+
+	ret = ldb_search(state->sam_ldb, mem_ctx, &dom_res,
+			 state->domain_dn, LDB_SCOPE_BASE, dom_attrs, NULL);
+	if (ret != LDB_SUCCESS) {
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+	if (dom_res->count != 1) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->domain_sid = samdb_result_dom_sid(state, dom_res->msgs[0], "objectSid");
+	if (!state->domain_sid) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->domain_guid = samdb_result_guid(dom_res->msgs[0], "objectGUID");
+
+	state->mixed_domain = ldb_msg_find_attr_as_uint(dom_res->msgs[0], "nTMixedDomain", 0);
+	
+	talloc_free(dom_res);
+
+	state->domain_name = lpcfg_sam_name(dce_call->conn->dce_ctx->lp_ctx);
+
+	state->domain_dns = ldb_dn_canonical_string(state, state->domain_dn);
+	if (!state->domain_dns) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+	p = strchr(state->domain_dns, '/');
+	if (p) {
+		*p = '\0';
+	}
+
+	state->forest_dns = ldb_dn_canonical_string(state, state->forest_dn);
+	if (!state->forest_dns) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+	p = strchr(state->forest_dns, '/');
+	if (p) {
+		*p = '\0';
+	}
+
+	/* work out the builtin_dn - useful for so many calls its worth
+	   fetching here */
+	state->builtin_dn = samdb_search_dn(state->sam_ldb, state, state->domain_dn, "(objectClass=builtinDomain)");
+	if (!state->builtin_dn) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	/* work out the system_dn - useful for so many calls its worth
+	   fetching here */
+	state->system_dn = samdb_system_container_dn(state->sam_ldb, state);
+	if (state->system_dn == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	state->builtin_sid = dom_sid_parse_talloc(state, SID_BUILTIN);
+	if (!state->builtin_sid) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->nt_authority_sid = dom_sid_parse_talloc(state, SID_NT_AUTHORITY);
+	if (!state->nt_authority_sid) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->creator_owner_domain_sid = dom_sid_parse_talloc(state, SID_CREATOR_OWNER_DOMAIN);
+	if (!state->creator_owner_domain_sid) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->world_domain_sid = dom_sid_parse_talloc(state, SID_WORLD_DOMAIN);
+	if (!state->world_domain_sid) {
+		return NT_STATUS_NO_SUCH_DOMAIN;		
+	}
+
+	state->sd = sddl_decode(state, DCESRV_LSA_POLICY_SD_SDDL,
+				state->domain_sid);
+	if (state->sd == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	state->sd->dacl->revision = SECURITY_ACL_REVISION_NT4;
+
+	se_map_generic(&access_desired, &dcesrv_lsa_policy_mapping);
+	security_acl_map_generic(state->sd->dacl, &dcesrv_lsa_policy_mapping);
+
+	security_level = security_session_user_level(session_info, NULL);
+	if (security_level >= SECURITY_SYSTEM) {
+		/*
+		 * The security descriptor doesn't allow system,
+		 * but we want to allow system via ncalrpc as root.
+		 */
+		state->access_mask = access_desired;
+		if (state->access_mask & SEC_FLAG_MAXIMUM_ALLOWED) {
+			state->access_mask &= ~SEC_FLAG_MAXIMUM_ALLOWED;
+			state->access_mask |= LSA_POLICY_ALL_ACCESS;
+		}
+	} else {
+		NTSTATUS status;
+
+		status = se_access_check(state->sd,
+					 session_info->security_token,
+					 access_desired,
+					 &state->access_mask);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(2,("%s: access desired[0x%08X] rejected[0x%08X] - %s\n",
+				 __func__,
+				 (unsigned)access_desired,
+				 (unsigned)state->access_mask,
+				 nt_errstr(status)));
+			return status;
+		}
+	}
+
+	DEBUG(10,("%s: access desired[0x%08X] granted[0x%08X] - success.\n",
+		  __func__,
+		 (unsigned)access_desired,
+		 (unsigned)state->access_mask));
+
+	*_state = state;
+
+	return NT_STATUS_OK;
+}
+
+/* 
+  lsa_OpenPolicy2
+*/
+NTSTATUS dcesrv_lsa_OpenPolicy2(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
+				struct lsa_OpenPolicy2 *r)
+{
+	enum dcerpc_transport_t transport =
+		dcerpc_binding_get_transport(dce_call->conn->endpoint->ep_description);
+	NTSTATUS status;
+	struct lsa_policy_state *state;
+	struct dcesrv_handle *handle;
+
+	if (transport != NCACN_NP && transport != NCALRPC) {
+		DCESRV_FAULT(DCERPC_FAULT_ACCESS_DENIED);
+	}
+
+	ZERO_STRUCTP(r->out.handle);
+
+	if (r->in.attr != NULL &&
+	    r->in.attr->root_dir != NULL) {
+		/* MS-LSAD 3.1.4.4.1 */
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	status = dcesrv_lsa_get_policy_state(dce_call, mem_ctx,
+					     r->in.access_mask,
+					     &state);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	handle = dcesrv_handle_create(dce_call, LSA_HANDLE_POLICY);
+	if (!handle) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	handle->data = talloc_steal(handle, state);
+
+	state->handle = handle;
+	*r->out.handle = handle->wire_handle;
+
+	/* note that we have completely ignored the attr element of
+	   the OpenPolicy. As far as I can tell, this is what w2k3
+	   does */
+
+	return NT_STATUS_OK;
+}
+
+/* 
+  lsa_OpenPolicy
+  a wrapper around lsa_OpenPolicy2
+*/
+NTSTATUS dcesrv_lsa_OpenPolicy(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
+				struct lsa_OpenPolicy *r)
+{
+	enum dcerpc_transport_t transport =
+		dcerpc_binding_get_transport(dce_call->conn->endpoint->ep_description);
+	struct lsa_OpenPolicy2 r2;
+
+	if (transport != NCACN_NP && transport != NCALRPC) {
+		DCESRV_FAULT(DCERPC_FAULT_ACCESS_DENIED);
+	}
+
+	r2.in.system_name = NULL;
+	r2.in.attr = r->in.attr;
+	r2.in.access_mask = r->in.access_mask;
+	r2.out.handle = r->out.handle;
+
+	return dcesrv_lsa_OpenPolicy2(dce_call, mem_ctx, &r2);
+}
+
+