s3:winbind: Add async wb_gid2sid

12 files changed, 541 insertions, 2 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index 48f6a9ad2e..4a872fe885 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -1157,6 +1157,7 @@ WINBINDD_OBJ1 = \
 		winbindd/wb_sid2uid.o \
 		winbindd/wb_sid2gid.o \
 		winbindd/wb_uid2sid.o \
+		winbindd/wb_gid2sid.o \
 		winbindd/winbindd_lookupsid.o \
 		winbindd/winbindd_lookupname.o \
 		winbindd/winbindd_sid_to_uid.o \
diff --git a/source3/librpc/gen_ndr/cli_wbint.c b/source3/librpc/gen_ndr/cli_wbint.c
index 847c937fe8..4176e94a3f 100644
--- a/source3/librpc/gen_ndr/cli_wbint.c
+++ b/source3/librpc/gen_ndr/cli_wbint.c
@@ -997,3 +997,168 @@ NTSTATUS rpccli_wbint_Uid2Sid(struct rpc_pipe_client *cli,
 	return r.out.result;
 }
 
+struct rpccli_wbint_Gid2Sid_state {
+	struct wbint_Gid2Sid orig;
+	struct wbint_Gid2Sid tmp;
+	TALLOC_CTX *out_mem_ctx;
+	NTSTATUS (*dispatch_recv)(struct tevent_req *req, TALLOC_CTX *mem_ctx);
+};
+
+static void rpccli_wbint_Gid2Sid_done(struct tevent_req *subreq);
+
+struct tevent_req *rpccli_wbint_Gid2Sid_send(TALLOC_CTX *mem_ctx,
+					     struct tevent_context *ev,
+					     struct rpc_pipe_client *cli,
+					     const char *_dom_name /* [in] [unique,charset(UTF8)] */,
+					     uint64_t _gid /* [in]  */,
+					     struct dom_sid *_sid /* [out] [ref] */)
+{
+	struct tevent_req *req;
+	struct rpccli_wbint_Gid2Sid_state *state;
+	struct tevent_req *subreq;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct rpccli_wbint_Gid2Sid_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->out_mem_ctx = NULL;
+	state->dispatch_recv = cli->dispatch_recv;
+
+	/* In parameters */
+	state->orig.in.dom_name = _dom_name;
+	state->orig.in.gid = _gid;
+
+	/* Out parameters */
+	state->orig.out.sid = _sid;
+
+	/* Result */
+	ZERO_STRUCT(state->orig.out.result);
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_IN_DEBUG(wbint_Gid2Sid, &state->orig);
+	}
+
+	state->out_mem_ctx = talloc_named_const(state, 0,
+			     "rpccli_wbint_Gid2Sid_out_memory");
+	if (tevent_req_nomem(state->out_mem_ctx, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	/* make a temporary copy, that we pass to the dispatch function */
+	state->tmp = state->orig;
+
+	subreq = cli->dispatch_send(state, ev, cli,
+				    &ndr_table_wbint,
+				    NDR_WBINT_GID2SID,
+				    &state->tmp);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, rpccli_wbint_Gid2Sid_done, req);
+	return req;
+}
+
+static void rpccli_wbint_Gid2Sid_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct rpccli_wbint_Gid2Sid_state *state = tevent_req_data(
+		req, struct rpccli_wbint_Gid2Sid_state);
+	NTSTATUS status;
+	TALLOC_CTX *mem_ctx;
+
+	if (state->out_mem_ctx) {
+		mem_ctx = state->out_mem_ctx;
+	} else {
+		mem_ctx = state;
+	}
+
+	status = state->dispatch_recv(subreq, mem_ctx);
+	TALLOC_FREE(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		tevent_req_nterror(req, status);
+		return;
+	}
+
+	/* Copy out parameters */
+	*state->orig.out.sid = *state->tmp.out.sid;
+
+	/* Copy result */
+	state->orig.out.result = state->tmp.out.result;
+
+	/* Reset temporary structure */
+	ZERO_STRUCT(state->tmp);
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_OUT_DEBUG(wbint_Gid2Sid, &state->orig);
+	}
+
+	tevent_req_done(req);
+}
+
+NTSTATUS rpccli_wbint_Gid2Sid_recv(struct tevent_req *req,
+				   TALLOC_CTX *mem_ctx,
+				   NTSTATUS *result)
+{
+	struct rpccli_wbint_Gid2Sid_state *state = tevent_req_data(
+		req, struct rpccli_wbint_Gid2Sid_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	/* Steal possbile out parameters to the callers context */
+	talloc_steal(mem_ctx, state->out_mem_ctx);
+
+	/* Return result */
+	*result = state->orig.out.result;
+
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
+
+NTSTATUS rpccli_wbint_Gid2Sid(struct rpc_pipe_client *cli,
+			      TALLOC_CTX *mem_ctx,
+			      const char *dom_name /* [in] [unique,charset(UTF8)] */,
+			      uint64_t gid /* [in]  */,
+			      struct dom_sid *sid /* [out] [ref] */)
+{
+	struct wbint_Gid2Sid r;
+	NTSTATUS status;
+
+	/* In parameters */
+	r.in.dom_name = dom_name;
+	r.in.gid = gid;
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_IN_DEBUG(wbint_Gid2Sid, &r);
+	}
+
+	status = cli->dispatch(cli,
+				mem_ctx,
+				&ndr_table_wbint,
+				NDR_WBINT_GID2SID,
+				&r);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_OUT_DEBUG(wbint_Gid2Sid, &r);
+	}
+
+	if (NT_STATUS_IS_ERR(status)) {
+		return status;
+	}
+
+	/* Return variables */
+	*sid = *r.out.sid;
+
+	/* Return result */
+	return r.out.result;
+}
+
diff --git a/source3/librpc/gen_ndr/cli_wbint.h b/source3/librpc/gen_ndr/cli_wbint.h
index 458e69211b..55fe22bd8f 100644
--- a/source3/librpc/gen_ndr/cli_wbint.h
+++ b/source3/librpc/gen_ndr/cli_wbint.h
@@ -88,4 +88,18 @@ NTSTATUS rpccli_wbint_Uid2Sid(struct rpc_pipe_client *cli,
 			      const char *dom_name /* [in] [unique,charset(UTF8)] */,
 			      uint64_t uid /* [in]  */,
 			      struct dom_sid *sid /* [out] [ref] */);
+struct tevent_req *rpccli_wbint_Gid2Sid_send(TALLOC_CTX *mem_ctx,
+					     struct tevent_context *ev,
+					     struct rpc_pipe_client *cli,
+					     const char *_dom_name /* [in] [unique,charset(UTF8)] */,
+					     uint64_t _gid /* [in]  */,
+					     struct dom_sid *_sid /* [out] [ref] */);
+NTSTATUS rpccli_wbint_Gid2Sid_recv(struct tevent_req *req,
+				   TALLOC_CTX *mem_ctx,
+				   NTSTATUS *result);
+NTSTATUS rpccli_wbint_Gid2Sid(struct rpc_pipe_client *cli,
+			      TALLOC_CTX *mem_ctx,
+			      const char *dom_name /* [in] [unique,charset(UTF8)] */,
+			      uint64_t gid /* [in]  */,
+			      struct dom_sid *sid /* [out] [ref] */);
 #endif /* __CLI_WBINT__ */
diff --git a/source3/librpc/gen_ndr/ndr_wbint.c b/source3/librpc/gen_ndr/ndr_wbint.c
index 90a4fcf883..f6e53eef96 100644
--- a/source3/librpc/gen_ndr/ndr_wbint.c
+++ b/source3/librpc/gen_ndr/ndr_wbint.c
@@ -673,6 +673,103 @@ _PUBLIC_ void ndr_print_wbint_Uid2Sid(struct ndr_print *ndr, const char *name, i
 	ndr->depth--;
 }
 
+static enum ndr_err_code ndr_push_wbint_Gid2Sid(struct ndr_push *ndr, int flags, const struct wbint_Gid2Sid *r)
+{
+	if (flags & NDR_IN) {
+		NDR_CHECK(ndr_push_unique_ptr(ndr, r->in.dom_name));
+		if (r->in.dom_name) {
+			NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, ndr_charset_length(r->in.dom_name, CH_UTF8)));
+			NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
+			NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, ndr_charset_length(r->in.dom_name, CH_UTF8)));
+			NDR_CHECK(ndr_push_charset(ndr, NDR_SCALARS, r->in.dom_name, ndr_charset_length(r->in.dom_name, CH_UTF8), sizeof(uint8_t), CH_UTF8));
+		}
+		NDR_CHECK(ndr_push_hyper(ndr, NDR_SCALARS, r->in.gid));
+	}
+	if (flags & NDR_OUT) {
+		if (r->out.sid == NULL) {
+			return ndr_push_error(ndr, NDR_ERR_INVALID_POINTER, "NULL [ref] pointer");
+		}
+		NDR_CHECK(ndr_push_dom_sid(ndr, NDR_SCALARS, r->out.sid));
+		NDR_CHECK(ndr_push_NTSTATUS(ndr, NDR_SCALARS, r->out.result));
+	}
+	return NDR_ERR_SUCCESS;
+}
+
+static enum ndr_err_code ndr_pull_wbint_Gid2Sid(struct ndr_pull *ndr, int flags, struct wbint_Gid2Sid *r)
+{
+	uint32_t _ptr_dom_name;
+	TALLOC_CTX *_mem_save_dom_name_0;
+	TALLOC_CTX *_mem_save_sid_0;
+	if (flags & NDR_IN) {
+		ZERO_STRUCT(r->out);
+
+		NDR_CHECK(ndr_pull_generic_ptr(ndr, &_ptr_dom_name));
+		if (_ptr_dom_name) {
+			NDR_PULL_ALLOC(ndr, r->in.dom_name);
+		} else {
+			r->in.dom_name = NULL;
+		}
+		if (r->in.dom_name) {
+			_mem_save_dom_name_0 = NDR_PULL_GET_MEM_CTX(ndr);
+			NDR_PULL_SET_MEM_CTX(ndr, r->in.dom_name, 0);
+			NDR_CHECK(ndr_pull_array_size(ndr, &r->in.dom_name));
+			NDR_CHECK(ndr_pull_array_length(ndr, &r->in.dom_name));
+			if (ndr_get_array_length(ndr, &r->in.dom_name) > ndr_get_array_size(ndr, &r->in.dom_name)) {
+				return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "Bad array size %u should exceed array length %u", ndr_get_array_size(ndr, &r->in.dom_name), ndr_get_array_length(ndr, &r->in.dom_name));
+			}
+			NDR_CHECK(ndr_check_string_terminator(ndr, ndr_get_array_length(ndr, &r->in.dom_name), sizeof(uint8_t)));
+			NDR_CHECK(ndr_pull_charset(ndr, NDR_SCALARS, &r->in.dom_name, ndr_get_array_length(ndr, &r->in.dom_name), sizeof(uint8_t), CH_UTF8));
+			NDR_PULL_SET_MEM_CTX(ndr, _mem_save_dom_name_0, 0);
+		}
+		NDR_CHECK(ndr_pull_hyper(ndr, NDR_SCALARS, &r->in.gid));
+		NDR_PULL_ALLOC(ndr, r->out.sid);
+		ZERO_STRUCTP(r->out.sid);
+	}
+	if (flags & NDR_OUT) {
+		if (ndr->flags & LIBNDR_FLAG_REF_ALLOC) {
+			NDR_PULL_ALLOC(ndr, r->out.sid);
+		}
+		_mem_save_sid_0 = NDR_PULL_GET_MEM_CTX(ndr);
+		NDR_PULL_SET_MEM_CTX(ndr, r->out.sid, LIBNDR_FLAG_REF_ALLOC);
+		NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, r->out.sid));
+		NDR_PULL_SET_MEM_CTX(ndr, _mem_save_sid_0, LIBNDR_FLAG_REF_ALLOC);
+		NDR_CHECK(ndr_pull_NTSTATUS(ndr, NDR_SCALARS, &r->out.result));
+	}
+	return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ void ndr_print_wbint_Gid2Sid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Gid2Sid *r)
+{
+	ndr_print_struct(ndr, name, "wbint_Gid2Sid");
+	ndr->depth++;
+	if (flags & NDR_SET_VALUES) {
+		ndr->flags |= LIBNDR_PRINT_SET_VALUES;
+	}
+	if (flags & NDR_IN) {
+		ndr_print_struct(ndr, "in", "wbint_Gid2Sid");
+		ndr->depth++;
+		ndr_print_ptr(ndr, "dom_name", r->in.dom_name);
+		ndr->depth++;
+		if (r->in.dom_name) {
+			ndr_print_string(ndr, "dom_name", r->in.dom_name);
+		}
+		ndr->depth--;
+		ndr_print_hyper(ndr, "gid", r->in.gid);
+		ndr->depth--;
+	}
+	if (flags & NDR_OUT) {
+		ndr_print_struct(ndr, "out", "wbint_Gid2Sid");
+		ndr->depth++;
+		ndr_print_ptr(ndr, "sid", r->out.sid);
+		ndr->depth++;
+		ndr_print_dom_sid(ndr, "sid", r->out.sid);
+		ndr->depth--;
+		ndr_print_NTSTATUS(ndr, "result", r->out.result);
+		ndr->depth--;
+	}
+	ndr->depth--;
+}
+
 static const struct ndr_interface_call wbint_calls[] = {
 	{
 		"wbint_Ping",
@@ -722,6 +819,14 @@ static const struct ndr_interface_call wbint_calls[] = {
 		(ndr_print_function_t) ndr_print_wbint_Uid2Sid,
 		false,
 	},
+	{
+		"wbint_Gid2Sid",
+		sizeof(struct wbint_Gid2Sid),
+		(ndr_push_flags_fn_t) ndr_push_wbint_Gid2Sid,
+		(ndr_pull_flags_fn_t) ndr_pull_wbint_Gid2Sid,
+		(ndr_print_function_t) ndr_print_wbint_Gid2Sid,
+		false,
+	},
 	{ NULL, 0, NULL, NULL, NULL, false }
 };
 
@@ -751,7 +856,7 @@ const struct ndr_interface_table ndr_table_wbint = {
 		NDR_WBINT_VERSION
 	},
 	.helpstring	= NDR_WBINT_HELPSTRING,
-	.num_calls	= 6,
+	.num_calls	= 7,
 	.calls		= wbint_calls,
 	.endpoints	= &wbint_endpoints,
 	.authservices	= &wbint_authservices
diff --git a/source3/librpc/gen_ndr/ndr_wbint.h b/source3/librpc/gen_ndr/ndr_wbint.h
index 169487079d..d8843a3c0c 100644
--- a/source3/librpc/gen_ndr/ndr_wbint.h
+++ b/source3/librpc/gen_ndr/ndr_wbint.h
@@ -23,11 +23,14 @@ extern const struct ndr_interface_table ndr_table_wbint;
 
 #define NDR_WBINT_UID2SID (0x05)
 
-#define NDR_WBINT_CALL_COUNT (6)
+#define NDR_WBINT_GID2SID (0x06)
+
+#define NDR_WBINT_CALL_COUNT (7)
 void ndr_print_wbint_Ping(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Ping *r);
 void ndr_print_wbint_LookupSid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_LookupSid *r);
 void ndr_print_wbint_LookupName(struct ndr_print *ndr, const char *name, int flags, const struct wbint_LookupName *r);
 void ndr_print_wbint_Sid2Uid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Sid2Uid *r);
 void ndr_print_wbint_Sid2Gid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Sid2Gid *r);
 void ndr_print_wbint_Uid2Sid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Uid2Sid *r);
+void ndr_print_wbint_Gid2Sid(struct ndr_print *ndr, const char *name, int flags, const struct wbint_Gid2Sid *r);
 #endif /* _HEADER_NDR_wbint */
diff --git a/source3/librpc/gen_ndr/srv_wbint.c b/source3/librpc/gen_ndr/srv_wbint.c
index 7a76f53959..a04aa8245f 100644
--- a/source3/librpc/gen_ndr/srv_wbint.c
+++ b/source3/librpc/gen_ndr/srv_wbint.c
@@ -504,6 +504,86 @@ static bool api_wbint_Uid2Sid(pipes_struct *p)
 	return true;
 }
 
+static bool api_wbint_Gid2Sid(pipes_struct *p)
+{
+	const struct ndr_interface_call *call;
+	struct ndr_pull *pull;
+	struct ndr_push *push;
+	enum ndr_err_code ndr_err;
+	DATA_BLOB blob;
+	struct wbint_Gid2Sid *r;
+
+	call = &ndr_table_wbint.calls[NDR_WBINT_GID2SID];
+
+	r = talloc(talloc_tos(), struct wbint_Gid2Sid);
+	if (r == NULL) {
+		return false;
+	}
+
+	if (!prs_data_blob(&p->in_data.data, &blob, r)) {
+		talloc_free(r);
+		return false;
+	}
+
+	pull = ndr_pull_init_blob(&blob, r, NULL);
+	if (pull == NULL) {
+		talloc_free(r);
+		return false;
+	}
+
+	pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+	ndr_err = call->ndr_pull(pull, NDR_IN, r);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		talloc_free(r);
+		return false;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_IN_DEBUG(wbint_Gid2Sid, r);
+	}
+
+	ZERO_STRUCT(r->out);
+	r->out.sid = talloc_zero(r, struct dom_sid);
+	if (r->out.sid == NULL) {
+		talloc_free(r);
+		return false;
+	}
+
+	r->out.result = _wbint_Gid2Sid(p, r);
+
+	if (p->rng_fault_state) {
+		talloc_free(r);
+		/* Return true here, srv_pipe_hnd.c will take care */
+		return true;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_OUT_DEBUG(wbint_Gid2Sid, r);
+	}
+
+	push = ndr_push_init_ctx(r, NULL);
+	if (push == NULL) {
+		talloc_free(r);
+		return false;
+	}
+
+	ndr_err = call->ndr_push(push, NDR_OUT, r);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		talloc_free(r);
+		return false;
+	}
+
+	blob = ndr_push_blob(push);
+	if (!prs_copy_data_in(&p->out_data.rdata, (const char *)blob.data, (uint32_t)blob.length)) {
+		talloc_free(r);
+		return false;
+	}
+
+	talloc_free(r);
+
+	return true;
+}
+
 
 /* Tables */
 static struct api_struct api_wbint_cmds[] =
@@ -514,6 +594,7 @@ static struct api_struct api_wbint_cmds[] =
 	{"WBINT_SID2UID", NDR_WBINT_SID2UID, api_wbint_Sid2Uid},
 	{"WBINT_SID2GID", NDR_WBINT_SID2GID, api_wbint_Sid2Gid},
 	{"WBINT_UID2SID", NDR_WBINT_UID2SID, api_wbint_Uid2Sid},
+	{"WBINT_GID2SID", NDR_WBINT_GID2SID, api_wbint_Gid2Sid},
 };
 
 void wbint_get_pipe_fns(struct api_struct **fns, int *n_fns)
@@ -617,6 +698,18 @@ NTSTATUS rpc_wbint_dispatch(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, co
 			return NT_STATUS_OK;
 		}
 
+		case NDR_WBINT_GID2SID: {
+			struct wbint_Gid2Sid *r = (struct wbint_Gid2Sid *)_r;
+			ZERO_STRUCT(r->out);
+			r->out.sid = talloc_zero(mem_ctx, struct dom_sid);
+			if (r->out.sid == NULL) {
+			return NT_STATUS_NO_MEMORY;
+			}
+
+			r->out.result = _wbint_Gid2Sid(cli->pipes_struct, r);
+			return NT_STATUS_OK;
+		}
+
 		default:
 			return NT_STATUS_NOT_IMPLEMENTED;
 	}
diff --git a/source3/librpc/gen_ndr/srv_wbint.h b/source3/librpc/gen_ndr/srv_wbint.h
index d1141b0a02..9311e6b641 100644
--- a/source3/librpc/gen_ndr/srv_wbint.h
+++ b/source3/librpc/gen_ndr/srv_wbint.h
@@ -7,6 +7,7 @@ NTSTATUS _wbint_LookupName(pipes_struct *p, struct wbint_LookupName *r);
 NTSTATUS _wbint_Sid2Uid(pipes_struct *p, struct wbint_Sid2Uid *r);
 NTSTATUS _wbint_Sid2Gid(pipes_struct *p, struct wbint_Sid2Gid *r);
 NTSTATUS _wbint_Uid2Sid(pipes_struct *p, struct wbint_Uid2Sid *r);
+NTSTATUS _wbint_Gid2Sid(pipes_struct *p, struct wbint_Gid2Sid *r);
 void wbint_get_pipe_fns(struct api_struct **fns, int *n_fns);
 NTSTATUS rpc_wbint_dispatch(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, const struct ndr_interface_table *table, uint32_t opnum, void *r);
 void _wbint_Ping(pipes_struct *p, struct wbint_Ping *r);
@@ -15,5 +16,6 @@ NTSTATUS _wbint_LookupName(pipes_struct *p, struct wbint_LookupName *r);
 NTSTATUS _wbint_Sid2Uid(pipes_struct *p, struct wbint_Sid2Uid *r);
 NTSTATUS _wbint_Sid2Gid(pipes_struct *p, struct wbint_Sid2Gid *r);
 NTSTATUS _wbint_Uid2Sid(pipes_struct *p, struct wbint_Uid2Sid *r);
+NTSTATUS _wbint_Gid2Sid(pipes_struct *p, struct wbint_Gid2Sid *r);
 NTSTATUS rpc_wbint_init(void);
 #endif /* __SRV_WBINT__ */
diff --git a/source3/librpc/gen_ndr/wbint.h b/source3/librpc/gen_ndr/wbint.h
index 03f58c813f..d6f344e5c9 100644
--- a/source3/librpc/gen_ndr/wbint.h
+++ b/source3/librpc/gen_ndr/wbint.h
@@ -93,4 +93,18 @@ struct wbint_Uid2Sid {
 
 };
 
+
+struct wbint_Gid2Sid {
+	struct {
+		const char *dom_name;/* [unique,charset(UTF8)] */
+		uint64_t gid;
+	} in;
+
+	struct {
+		struct dom_sid *sid;/* [ref] */
+		NTSTATUS result;
+	} out;
+
+};
+
 #endif /* _HEADER_wbint */
diff --git a/source3/librpc/idl/wbint.idl b/source3/librpc/idl/wbint.idl
index bc10b23f56..93627fbe07 100644
--- a/source3/librpc/idl/wbint.idl
+++ b/source3/librpc/idl/wbint.idl
@@ -47,4 +47,10 @@ interface wbint
 	[in] hyper uid,
 	[out] dom_sid *sid
 	);
+
+    NTSTATUS wbint_Gid2Sid(
+	[in,unique,string,charset(UTF8)] char *dom_name,
+	[in] hyper gid,
+	[out] dom_sid *sid
+	);
 }
\ No newline at end of file
diff --git a/source3/winbindd/wb_gid2sid.c b/source3/winbindd/wb_gid2sid.c
new file mode 100644
index 0000000000..a0ae850ef8
--- /dev/null
+++ b/source3/winbindd/wb_gid2sid.c
@@ -0,0 +1,119 @@
+/*
+   Unix SMB/CIFS implementation.
+   async gid2sid
+   Copyright (C) Volker Lendecke 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 "winbindd.h"
+#include "librpc/gen_ndr/cli_wbint.h"
+
+struct wb_gid2sid_state {
+	struct tevent_context *ev;
+	char *dom_name;
+	struct dom_sid sid;
+};
+
+static void wb_gid2sid_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_gid2sid_send(TALLOC_CTX *mem_ctx,
+				   struct tevent_context *ev,
+				   gid_t gid)
+{
+	struct tevent_req *req, *subreq;
+	struct wb_gid2sid_state *state;
+	struct winbindd_domain *domain;
+	struct winbindd_child *child;
+	bool expired;
+
+	req = tevent_req_create(mem_ctx, &state, struct wb_gid2sid_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	if (winbindd_use_idmap_cache()
+	    && idmap_cache_find_gid2sid(gid, &state->sid, &expired)) {
+
+		DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
+			   (int)gid, expired ? " (expired)": ""));
+
+		if (!expired || idmap_is_offline()) {
+			if (is_null_sid(&state->sid)) {
+				tevent_req_nterror(req,
+						   NT_STATUS_NONE_MAPPED);
+			} else {
+				tevent_req_done(req);
+			}
+			return tevent_req_post(req, ev);
+		}
+	}
+
+	state->dom_name = NULL;
+
+	for (domain = domain_list(); domain != NULL; domain = domain->next) {
+		if (domain->have_idmap_config
+		    && (gid >= domain->id_range_low)
+		    && (gid <= domain->id_range_high)) {
+			state->dom_name = domain->name;
+			break;
+		}
+	}
+
+	child = idmap_child();
+
+	subreq = rpccli_wbint_Gid2Sid_send(
+		state, ev, child->rpccli, state->dom_name,
+		gid, &state->sid);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, wb_gid2sid_done, req);
+	return req;
+}
+
+static void wb_gid2sid_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct wb_gid2sid_state *state = tevent_req_data(
+		req, struct wb_gid2sid_state);
+	NTSTATUS status, result;
+
+	status = rpccli_wbint_Gid2Sid_recv(subreq, state, &result);
+	TALLOC_FREE(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		tevent_req_nterror(req, status);
+		return;
+	}
+	if (!NT_STATUS_IS_OK(result)) {
+		tevent_req_nterror(req, result);
+		return;
+	}
+	tevent_req_done(req);
+}
+
+NTSTATUS wb_gid2sid_recv(struct tevent_req *req, struct dom_sid *sid)
+{
+	struct wb_gid2sid_state *state = tevent_req_data(
+		req, struct wb_gid2sid_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+	sid_copy(sid, &state->sid);
+	return NT_STATUS_OK;
+}
diff --git a/source3/winbindd/winbindd_dual_srv.c b/source3/winbindd/winbindd_dual_srv.c
index bad9cd585a..35fecbd08e 100644
--- a/source3/winbindd/winbindd_dual_srv.c
+++ b/source3/winbindd/winbindd_dual_srv.c
@@ -105,3 +105,15 @@ NTSTATUS _wbint_Uid2Sid(pipes_struct *p, struct wbint_Uid2Sid *r)
 	}
 	return NT_STATUS_OK;
 }
+
+NTSTATUS _wbint_Gid2Sid(pipes_struct *p, struct wbint_Gid2Sid *r)
+{
+	NTSTATUS status;
+
+	status = idmap_gid_to_sid(r->in.dom_name ? r->in.dom_name : "",
+				  r->out.sid, r->in.gid);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	return NT_STATUS_OK;
+}
diff --git a/source3/winbindd/winbindd_proto.h b/source3/winbindd/winbindd_proto.h
index f1fb7e0a87..d8bd984590 100644
--- a/source3/winbindd/winbindd_proto.h
+++ b/source3/winbindd/winbindd_proto.h
@@ -670,5 +670,10 @@ struct tevent_req *winbindd_uid_to_sid_send(TALLOC_CTX *mem_ctx,
 NTSTATUS winbindd_uid_to_sid_recv(struct tevent_req *req,
 				  struct winbindd_response *response);
 
+struct tevent_req *wb_gid2sid_send(TALLOC_CTX *mem_ctx,
+				   struct tevent_context *ev,
+				   gid_t gid);
+NTSTATUS wb_gid2sid_recv(struct tevent_req *req, struct dom_sid *sid);
+
 
 #endif /*  _WINBINDD_PROTO_H_  */