From: Samuel Cabrero Date: Thu, 3 Oct 2019 17:38:31 +0000 (+0200) Subject: s4:rpc_server: Move core functions to core library X-Git-Tag: talloc-2.3.1~297 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=491102b5b2ca56375d5a58e98f1c037298aa89f3;p=thirdparty%2Fsamba.git s4:rpc_server: Move core functions to core library Signed-off-by: Samuel Cabrero Reviewed-by: Andrew Bartlett Reviewed-by: Andreas Schneider --- diff --git a/source4/rpc_server/dcesrv_auth.c b/librpc/rpc/dcesrv_auth.c similarity index 98% rename from source4/rpc_server/dcesrv_auth.c rename to librpc/rpc/dcesrv_auth.c index 87bc76d2780..8ac90f2a2bd 100644 --- a/source4/rpc_server/dcesrv_auth.c +++ b/librpc/rpc/dcesrv_auth.c @@ -1,4 +1,4 @@ -/* +/* Unix SMB/CIFS implementation. server side dcerpc authentication code @@ -10,25 +10,24 @@ 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 . */ #include "includes.h" -#include "rpc_server/dcerpc_server.h" -#include "rpc_server/dcerpc_server_proto.h" +#include "librpc/rpc/dcesrv_core.h" +#include "librpc/rpc/dcesrv_core_proto.h" #include "librpc/gen_ndr/ndr_dcerpc.h" #include "auth/credentials/credentials.h" #include "auth/gensec/gensec.h" #include "auth/auth.h" #include "param/param.h" -#include "librpc/rpc/rpc_common.h" static NTSTATUS dcesrv_auth_negotiate_hdr_signing(struct dcesrv_call_state *call, struct ncacn_packet *pkt) @@ -477,7 +476,7 @@ bool dcesrv_auth_prepare_auth3(struct dcesrv_call_state *call) /* parse any auth information from a dcerpc alter request - return false if we can't handle the auth request for some + return false if we can't handle the auth request for some reason (in which case we send a bind_nak (is this true for here?)) */ bool dcesrv_auth_alter(struct dcesrv_call_state *call) @@ -637,7 +636,7 @@ bool dcesrv_auth_pkt_pull(struct dcesrv_call_state *call, return true; } -/* +/* push a signed or sealed dcerpc request packet into a blob */ bool dcesrv_auth_pkt_push(struct dcesrv_call_state *call, diff --git a/librpc/rpc/dcesrv_core.c b/librpc/rpc/dcesrv_core.c index 94f7680597e..2bc94ce66a5 100644 --- a/librpc/rpc/dcesrv_core.c +++ b/librpc/rpc/dcesrv_core.c @@ -22,4 +22,2781 @@ */ #include "includes.h" -#include "dcesrv_core.h" +#include "librpc/rpc/dcesrv_core.h" +#include "librpc/rpc/dcesrv_core_proto.h" +#include "librpc/gen_ndr/auth.h" +#include "auth/gensec/gensec.h" +#include "lib/util/dlinklist.h" +#include "libcli/security/security.h" +#include "param/param.h" +#include "lib/tsocket/tsocket.h" +#include "librpc/gen_ndr/ndr_dcerpc.h" +#include "lib/util/tevent_ntstatus.h" + +static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call, + const struct dcerpc_bind *b, + struct dcerpc_ack_ctx *ack_ctx_list); + +/* + see if two endpoints match +*/ +static bool endpoints_match(const struct dcerpc_binding *ep1, + const struct dcerpc_binding *ep2) +{ + enum dcerpc_transport_t t1; + enum dcerpc_transport_t t2; + const char *e1; + const char *e2; + + t1 = dcerpc_binding_get_transport(ep1); + t2 = dcerpc_binding_get_transport(ep2); + + e1 = dcerpc_binding_get_string_option(ep1, "endpoint"); + e2 = dcerpc_binding_get_string_option(ep2, "endpoint"); + + if (t1 != t2) { + return false; + } + + if (!e1 || !e2) { + return e1 == e2; + } + + if (strcasecmp(e1, e2) != 0) { + return false; + } + + return true; +} + +/* + find an endpoint in the dcesrv_context +*/ +static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx, + const struct dcerpc_binding *ep_description) +{ + struct dcesrv_endpoint *ep; + for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) { + if (endpoints_match(ep->ep_description, ep_description)) { + return ep; + } + } + return NULL; +} + +/* + find a registered context_id from a bind or alter_context +*/ +static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn, + uint16_t context_id) +{ + struct dcesrv_connection_context *c; + for (c=conn->contexts;c;c=c->next) { + if (c->context_id == context_id) return c; + } + return NULL; +} + +/* + see if a uuid and if_version match to an interface +*/ +static bool interface_match(const struct dcesrv_interface *if1, + const struct dcesrv_interface *if2) +{ + return (if1->syntax_id.if_version == if2->syntax_id.if_version && + GUID_equal(&if1->syntax_id.uuid, &if2->syntax_id.uuid)); +} + +/* + find the interface operations on any endpoint with this binding +*/ +static const struct dcesrv_interface *find_interface_by_binding(struct dcesrv_context *dce_ctx, + struct dcerpc_binding *binding, + const struct dcesrv_interface *iface) +{ + struct dcesrv_endpoint *ep; + for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) { + if (endpoints_match(ep->ep_description, binding)) { + struct dcesrv_if_list *ifl; + for (ifl=ep->interface_list; ifl; ifl=ifl->next) { + if (interface_match(&(ifl->iface), iface)) { + return &(ifl->iface); + } + } + } + } + return NULL; +} + +/* + see if a uuid and if_version match to an interface +*/ +static bool interface_match_by_uuid(const struct dcesrv_interface *iface, + const struct GUID *uuid, uint32_t if_version) +{ + return (iface->syntax_id.if_version == if_version && + GUID_equal(&iface->syntax_id.uuid, uuid)); +} + +/* + find the interface operations on an endpoint by uuid +*/ +const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint, + const struct GUID *uuid, uint32_t if_version) +{ + struct dcesrv_if_list *ifl; + for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) { + if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) { + return &(ifl->iface); + } + } + return NULL; +} + +/* + find the earlier parts of a fragmented call awaiting reassembily +*/ +static struct dcesrv_call_state *dcesrv_find_fragmented_call(struct dcesrv_connection *dce_conn, uint32_t call_id) +{ + struct dcesrv_call_state *c; + for (c=dce_conn->incoming_fragmented_call_list;c;c=c->next) { + if (c->pkt.call_id == call_id) { + return c; + } + } + return NULL; +} + +/* + register an interface on an endpoint + + An endpoint is one unix domain socket (for ncalrpc), one TCP port + (for ncacn_ip_tcp) or one (forwarded) named pipe (for ncacn_np). + + Each endpoint can have many interfaces such as netlogon, lsa or + samr. Some have essentially the full set. + + This is driven from the set of interfaces listed in each IDL file + via the PIDL generated *__op_init_server() functions. +*/ +_PUBLIC_ NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx, + const char *ep_name, + const char *ncacn_np_secondary_endpoint, + const struct dcesrv_interface *iface, + const struct security_descriptor *sd) +{ + struct dcesrv_endpoint *ep; + struct dcesrv_if_list *ifl; + struct dcerpc_binding *binding; + struct dcerpc_binding *binding2 = NULL; + bool add_ep = false; + NTSTATUS status; + enum dcerpc_transport_t transport; + char *ep_string = NULL; + bool use_single_process = true; + const char *ep_process_string; + + /* + * If we are not using handles, there is no need for force + * this service into using a single process. + * + * However, due to the way we listen for RPC packets, we can + * only do this if we have a single service per pipe or TCP + * port, so we still force a single combined process for + * ncalrpc. + */ + if (iface->flags & DCESRV_INTERFACE_FLAGS_HANDLES_NOT_USED) { + use_single_process = false; + } + + status = dcerpc_parse_binding(dce_ctx, ep_name, &binding); + + if (NT_STATUS_IS_ERR(status)) { + DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name)); + return status; + } + + transport = dcerpc_binding_get_transport(binding); + if (transport == NCACN_IP_TCP) { + int port; + char port_str[6]; + + /* + * First check if there is already a port specified, eg + * for epmapper on ncacn_ip_tcp:[135] + */ + const char *endpoint + = dcerpc_binding_get_string_option(binding, + "endpoint"); + if (endpoint == NULL) { + port = lpcfg_parm_int(dce_ctx->lp_ctx, NULL, + "rpc server port", iface->name, 0); + + /* + * For RPC services that are not set to use a single + * process, we do not default to using the 'rpc server + * port' because that would cause a double-bind on + * that port. + */ + if (port == 0 && !use_single_process) { + port = lpcfg_rpc_server_port(dce_ctx->lp_ctx); + } + if (port != 0) { + snprintf(port_str, sizeof(port_str), "%u", port); + status = dcerpc_binding_set_string_option(binding, + "endpoint", + port_str); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + } + } + } + + if (transport == NCACN_NP && ncacn_np_secondary_endpoint != NULL) { + enum dcerpc_transport_t transport2; + + status = dcerpc_parse_binding(dce_ctx, + ncacn_np_secondary_endpoint, + &binding2); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Trouble parsing 2nd binding string '%s'\n", + ncacn_np_secondary_endpoint)); + return status; + } + + transport2 = dcerpc_binding_get_transport(binding2); + SMB_ASSERT(transport2 == transport); + } + + /* see if the interface is already registered on the endpoint */ + if (find_interface_by_binding(dce_ctx, binding, iface)!=NULL) { + DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n", + iface->name, ep_name)); + return NT_STATUS_OBJECT_NAME_COLLISION; + } + + /* check if this endpoint exists + */ + ep = find_endpoint(dce_ctx, binding); + + if (ep != NULL) { + /* + * We want a new port on ncacn_ip_tcp for NETLOGON, so + * it can be multi-process. Other processes can also + * listen on distinct ports, if they have one forced + * in the code above with eg 'rpc server port:drsuapi = 1027' + * + * If we have mulitiple endpoints on port 0, they each + * get an epemeral port (currently by walking up from + * 1024). + * + * Because one endpoint can only have one process + * model, we add a new IP_TCP endpoint for each model. + * + * This works in conjunction with the forced overwrite + * of ep->use_single_process below. + */ + if (ep->use_single_process != use_single_process + && transport == NCACN_IP_TCP) { + add_ep = true; + } + } + + if (ep == NULL || add_ep) { + ep = talloc_zero(dce_ctx, struct dcesrv_endpoint); + if (!ep) { + return NT_STATUS_NO_MEMORY; + } + ZERO_STRUCTP(ep); + ep->ep_description = talloc_move(ep, &binding); + ep->ep_2nd_description = talloc_move(ep, &binding2); + add_ep = true; + + /* add mgmt interface */ + ifl = talloc_zero(ep, struct dcesrv_if_list); + if (!ifl) { + return NT_STATUS_NO_MEMORY; + } + + ifl->iface = dcesrv_get_mgmt_interface(); + + DLIST_ADD(ep->interface_list, ifl); + } + + /* + * By default don't force into a single process, but if any + * interface on this endpoint on this service uses handles + * (most do), then we must force into single process mode + * + * By overwriting this each time a new interface is added to + * this endpoint, we end up with the most restrictive setting. + */ + if (use_single_process) { + ep->use_single_process = true; + } + + /* talloc a new interface list element */ + ifl = talloc_zero(ep, struct dcesrv_if_list); + if (!ifl) { + return NT_STATUS_NO_MEMORY; + } + + /* copy the given interface struct to the one on the endpoints interface list */ + memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface)); + + /* if we have a security descriptor given, + * we should see if we can set it up on the endpoint + */ + if (sd != NULL) { + /* if there's currently no security descriptor given on the endpoint + * we try to set it + */ + if (ep->sd == NULL) { + ep->sd = security_descriptor_copy(ep, sd); + } + + /* if now there's no security descriptor given on the endpoint + * something goes wrong, either we failed to copy the security descriptor + * or there was already one on the endpoint + */ + if (ep->sd != NULL) { + DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n" + " on endpoint '%s'\n", + iface->name, ep_name)); + if (add_ep) free(ep); + free(ifl); + return NT_STATUS_OBJECT_NAME_COLLISION; + } + } + + /* finally add the interface on the endpoint */ + DLIST_ADD(ep->interface_list, ifl); + + /* if it's a new endpoint add it to the dcesrv_context */ + if (add_ep) { + DLIST_ADD(dce_ctx->endpoint_list, ep); + } + + /* Re-get the string as we may have set a port */ + ep_string = dcerpc_binding_string(dce_ctx, ep->ep_description); + + if (use_single_process) { + ep_process_string = "single process required"; + } else { + ep_process_string = "multi process compatible"; + } + + DBG_INFO("Interface '%s' registered on endpoint '%s' (%s)\n", + iface->name, ep_string, ep_process_string); + TALLOC_FREE(ep_string); + + return NT_STATUS_OK; +} + +static NTSTATUS dcesrv_session_info_session_key(struct dcesrv_auth *auth, + DATA_BLOB *session_key) +{ + if (auth->session_info == NULL) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + + if (auth->session_info->session_key.length == 0) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + + *session_key = auth->session_info->session_key; + return NT_STATUS_OK; +} + +static NTSTATUS dcesrv_remote_session_key(struct dcesrv_auth *auth, + DATA_BLOB *session_key) +{ + if (auth->auth_type != DCERPC_AUTH_TYPE_NONE) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + + return dcesrv_session_info_session_key(auth, session_key); +} + +static NTSTATUS dcesrv_local_fixed_session_key(struct dcesrv_auth *auth, + DATA_BLOB *session_key) +{ + return dcerpc_generic_session_key(session_key); +} + +/* + * Fetch the authentication session key if available. + * + * This is the key generated by a gensec authentication. + * + */ +_PUBLIC_ NTSTATUS dcesrv_auth_session_key(struct dcesrv_call_state *call, + DATA_BLOB *session_key) +{ + struct dcesrv_auth *auth = call->auth_state; + SMB_ASSERT(auth->auth_finished); + return dcesrv_session_info_session_key(auth, session_key); +} + +/* + * Fetch the transport session key if available. + * Typically this is the SMB session key + * or a fixed key for local transports. + * + * The key is always truncated to 16 bytes. +*/ +_PUBLIC_ NTSTATUS dcesrv_transport_session_key(struct dcesrv_call_state *call, + DATA_BLOB *session_key) +{ + struct dcesrv_auth *auth = call->auth_state; + NTSTATUS status; + + SMB_ASSERT(auth->auth_finished); + + if (auth->session_key_fn == NULL) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + + status = auth->session_key_fn(auth, session_key); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + session_key->length = MIN(session_key->length, 16); + + return NT_STATUS_OK; +} + +static struct dcesrv_auth *dcesrv_auth_create(struct dcesrv_connection *conn) +{ + const struct dcesrv_endpoint *ep = conn->endpoint; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(ep->ep_description); + struct dcesrv_auth *auth = NULL; + + auth = talloc_zero(conn, struct dcesrv_auth); + if (auth == NULL) { + return NULL; + } + + switch (transport) { + case NCACN_NP: + auth->session_key_fn = dcesrv_remote_session_key; + break; + case NCALRPC: + case NCACN_UNIX_STREAM: + auth->session_key_fn = dcesrv_local_fixed_session_key; + break; + default: + /* + * All other's get a NULL pointer, which + * results in NT_STATUS_NO_USER_SESSION_KEY + */ + break; + } + + return auth; +} + +/* + connect to a dcerpc endpoint +*/ +_PUBLIC_ NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx, + TALLOC_CTX *mem_ctx, + const struct dcesrv_endpoint *ep, + struct auth_session_info *session_info, + struct tevent_context *event_ctx, + uint32_t state_flags, + struct dcesrv_connection **_p) +{ + struct dcesrv_auth *auth = NULL; + struct dcesrv_connection *p; + + if (!session_info) { + return NT_STATUS_ACCESS_DENIED; + } + + p = talloc_zero(mem_ctx, struct dcesrv_connection); + NT_STATUS_HAVE_NO_MEMORY(p); + + p->dce_ctx = dce_ctx; + p->endpoint = ep; + p->packet_log_dir = lpcfg_lock_directory(dce_ctx->lp_ctx); + p->event_ctx = event_ctx; + p->state_flags = state_flags; + p->allow_bind = true; + p->max_recv_frag = 5840; + p->max_xmit_frag = 5840; + p->max_total_request_size = DCERPC_NCACN_REQUEST_DEFAULT_MAX_SIZE; + + p->support_hdr_signing = lpcfg_parm_bool(dce_ctx->lp_ctx, + NULL, + "dcesrv", + "header signing", + true); + p->max_auth_states = lpcfg_parm_ulong(dce_ctx->lp_ctx, + NULL, + "dcesrv", + "max auth states", + 2049); + + auth = dcesrv_auth_create(p); + if (auth == NULL) { + talloc_free(p); + return NT_STATUS_NO_MEMORY; + } + + auth->session_info = talloc_reference(auth, session_info); + if (auth->session_info == NULL) { + talloc_free(p); + return NT_STATUS_NO_MEMORY; + } + + p->default_auth_state = auth; + + /* + * For now we only support NDR32. + */ + p->preferred_transfer = &ndr_transfer_syntax_ndr; + + *_p = p; + return NT_STATUS_OK; +} + +/* + move a call from an existing linked list to the specified list. This + prevents bugs where we forget to remove the call from a previous + list when moving it. + */ +static void dcesrv_call_set_list(struct dcesrv_call_state *call, + enum dcesrv_call_list list) +{ + switch (call->list) { + case DCESRV_LIST_NONE: + break; + case DCESRV_LIST_CALL_LIST: + DLIST_REMOVE(call->conn->call_list, call); + break; + case DCESRV_LIST_FRAGMENTED_CALL_LIST: + DLIST_REMOVE(call->conn->incoming_fragmented_call_list, call); + break; + case DCESRV_LIST_PENDING_CALL_LIST: + DLIST_REMOVE(call->conn->pending_call_list, call); + break; + } + call->list = list; + switch (list) { + case DCESRV_LIST_NONE: + break; + case DCESRV_LIST_CALL_LIST: + DLIST_ADD_END(call->conn->call_list, call); + break; + case DCESRV_LIST_FRAGMENTED_CALL_LIST: + DLIST_ADD_END(call->conn->incoming_fragmented_call_list, call); + break; + case DCESRV_LIST_PENDING_CALL_LIST: + DLIST_ADD_END(call->conn->pending_call_list, call); + break; + } +} + +static void dcesrv_call_disconnect_after(struct dcesrv_call_state *call, + const char *reason) +{ + struct dcesrv_auth *a = NULL; + + if (call->conn->terminate != NULL) { + return; + } + + call->conn->allow_bind = false; + call->conn->allow_alter = false; + + call->conn->default_auth_state->auth_invalid = true; + + for (a = call->conn->auth_states; a != NULL; a = a->next) { + a->auth_invalid = true; + } + + call->terminate_reason = talloc_strdup(call, reason); + if (call->terminate_reason == NULL) { + call->terminate_reason = __location__; + } +} + +/* + return a dcerpc bind_nak +*/ +static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason) +{ + struct ncacn_packet pkt; + struct dcerpc_bind_nak_version version; + struct data_blob_list_item *rep; + NTSTATUS status; + static const uint8_t _pad[3] = { 0, }; + + /* + * We add the call to the pending_call_list + * in order to defer the termination. + */ + dcesrv_call_disconnect_after(call, "dcesrv_bind_nak"); + + /* setup a bind_nak */ + dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); + pkt.auth_length = 0; + pkt.call_id = call->pkt.call_id; + pkt.ptype = DCERPC_PKT_BIND_NAK; + pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST; + pkt.u.bind_nak.reject_reason = reason; + version.rpc_vers = 5; + version.rpc_vers_minor = 0; + pkt.u.bind_nak.num_versions = 1; + pkt.u.bind_nak.versions = &version; + pkt.u.bind_nak._pad = data_blob_const(_pad, sizeof(_pad)); + + rep = talloc_zero(call, struct data_blob_list_item); + if (!rep) { + return NT_STATUS_NO_MEMORY; + } + + status = dcerpc_ncacn_push_auth(&rep->blob, call, &pkt, NULL); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + dcerpc_set_frag_length(&rep->blob, rep->blob.length); + + DLIST_ADD_END(call->replies, rep); + dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST); + + if (call->conn->call_list && call->conn->call_list->replies) { + if (call->conn->transport.report_output_data) { + call->conn->transport.report_output_data(call->conn); + } + } + + return NT_STATUS_OK; +} + +static NTSTATUS dcesrv_fault_disconnect(struct dcesrv_call_state *call, + uint32_t fault_code) +{ + /* + * We add the call to the pending_call_list + * in order to defer the termination. + */ + dcesrv_call_disconnect_after(call, "dcesrv_fault_disconnect"); + + return dcesrv_fault_with_flags(call, fault_code, + DCERPC_PFC_FLAG_DID_NOT_EXECUTE); +} + +static int dcesrv_connection_context_destructor(struct dcesrv_connection_context *c) +{ + DLIST_REMOVE(c->conn->contexts, c); + + if (c->iface && c->iface->unbind) { + c->iface->unbind(c, c->iface); + c->iface = NULL; + } + + return 0; +} + +static void dcesrv_prepare_context_auth(struct dcesrv_call_state *dce_call) +{ + struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx; + const struct dcesrv_endpoint *endpoint = dce_call->conn->endpoint; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(endpoint->ep_description); + struct dcesrv_connection_context *context = dce_call->context; + const struct dcesrv_interface *iface = context->iface; + + context->min_auth_level = DCERPC_AUTH_LEVEL_NONE; + + if (transport == NCALRPC) { + context->allow_connect = true; + return; + } + + /* + * allow overwrite per interface + * allow dcerpc auth level connect: + */ + context->allow_connect = lpcfg_allow_dcerpc_auth_level_connect(lp_ctx); + context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, + "allow dcerpc auth level connect", + iface->name, + context->allow_connect); +} + +NTSTATUS dcesrv_interface_bind_require_integrity(struct dcesrv_connection_context *context, + const struct dcesrv_interface *iface) +{ + /* + * For connection oriented DCERPC DCERPC_AUTH_LEVEL_PACKET (4) + * has the same behavior as DCERPC_AUTH_LEVEL_INTEGRITY (5). + */ + context->min_auth_level = DCERPC_AUTH_LEVEL_PACKET; + return NT_STATUS_OK; +} + +NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_connection_context *context, + const struct dcesrv_interface *iface) +{ + context->min_auth_level = DCERPC_AUTH_LEVEL_PRIVACY; + return NT_STATUS_OK; +} + +_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_connection_context *context, + const struct dcesrv_interface *iface) +{ + struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx; + const struct dcesrv_endpoint *endpoint = context->conn->endpoint; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(endpoint->ep_description); + + if (transport == NCALRPC) { + context->allow_connect = true; + return NT_STATUS_OK; + } + + /* + * allow overwrite per interface + * allow dcerpc auth level connect: + */ + context->allow_connect = false; + context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, + "allow dcerpc auth level connect", + iface->name, + context->allow_connect); + return NT_STATUS_OK; +} + +_PUBLIC_ NTSTATUS dcesrv_interface_bind_allow_connect(struct dcesrv_connection_context *context, + const struct dcesrv_interface *iface) +{ + struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx; + const struct dcesrv_endpoint *endpoint = context->conn->endpoint; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(endpoint->ep_description); + + if (transport == NCALRPC) { + context->allow_connect = true; + return NT_STATUS_OK; + } + + /* + * allow overwrite per interface + * allow dcerpc auth level connect: + */ + context->allow_connect = true; + context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, + "allow dcerpc auth level connect", + iface->name, + context->allow_connect); + return NT_STATUS_OK; +} + +struct dcesrv_conn_auth_wait_context { + struct tevent_req *req; + bool done; + NTSTATUS status; +}; + +struct dcesrv_conn_auth_wait_state { + uint8_t dummy; +}; + +static struct tevent_req *dcesrv_conn_auth_wait_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + void *private_data) +{ + struct dcesrv_conn_auth_wait_context *auth_wait = + talloc_get_type_abort(private_data, + struct dcesrv_conn_auth_wait_context); + struct tevent_req *req = NULL; + struct dcesrv_conn_auth_wait_state *state = NULL; + + req = tevent_req_create(mem_ctx, &state, + struct dcesrv_conn_auth_wait_state); + if (req == NULL) { + return NULL; + } + auth_wait->req = req; + + tevent_req_defer_callback(req, ev); + + if (!auth_wait->done) { + return req; + } + + if (tevent_req_nterror(req, auth_wait->status)) { + return tevent_req_post(req, ev); + } + + tevent_req_done(req); + return tevent_req_post(req, ev); +} + +static NTSTATUS dcesrv_conn_auth_wait_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +static NTSTATUS dcesrv_conn_auth_wait_setup(struct dcesrv_connection *conn) +{ + struct dcesrv_conn_auth_wait_context *auth_wait = NULL; + + if (conn->wait_send != NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + auth_wait = talloc_zero(conn, struct dcesrv_conn_auth_wait_context); + if (auth_wait == NULL) { + return NT_STATUS_NO_MEMORY; + } + + conn->wait_private = auth_wait; + conn->wait_send = dcesrv_conn_auth_wait_send; + conn->wait_recv = dcesrv_conn_auth_wait_recv; + return NT_STATUS_OK; +} + +static void dcesrv_conn_auth_wait_finished(struct dcesrv_connection *conn, + NTSTATUS status) +{ + struct dcesrv_conn_auth_wait_context *auth_wait = + talloc_get_type_abort(conn->wait_private, + struct dcesrv_conn_auth_wait_context); + + auth_wait->done = true; + auth_wait->status = status; + + if (auth_wait->req == NULL) { + return; + } + + if (tevent_req_nterror(auth_wait->req, status)) { + return; + } + + tevent_req_done(auth_wait->req); +} + +static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call); + +static void dcesrv_bind_done(struct tevent_req *subreq); + +/* + handle a bind request +*/ +static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call) +{ + struct dcesrv_connection *conn = call->conn; + struct ncacn_packet *pkt = &call->ack_pkt; + NTSTATUS status; + uint32_t extra_flags = 0; + uint16_t max_req = 0; + uint16_t max_rep = 0; + struct dcerpc_binding *ep_2nd_description = NULL; + const char *endpoint = NULL; + struct dcesrv_auth *auth = call->auth_state; + struct dcerpc_ack_ctx *ack_ctx_list = NULL; + struct dcerpc_ack_ctx *ack_features = NULL; + struct tevent_req *subreq = NULL; + size_t i; + + status = dcerpc_verify_ncacn_packet_header(&call->pkt, + DCERPC_PKT_BIND, + call->pkt.u.bind.auth_info.length, + 0, /* required flags */ + DCERPC_PFC_FLAG_FIRST | + DCERPC_PFC_FLAG_LAST | + DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | + 0x08 | /* this is not defined, but should be ignored */ + DCERPC_PFC_FLAG_CONC_MPX | + DCERPC_PFC_FLAG_DID_NOT_EXECUTE | + DCERPC_PFC_FLAG_MAYBE | + DCERPC_PFC_FLAG_OBJECT_UUID); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_bind_nak(call, + DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED); + } + + /* max_recv_frag and max_xmit_frag result always in the same value! */ + max_req = MIN(call->pkt.u.bind.max_xmit_frag, + call->pkt.u.bind.max_recv_frag); + /* + * The values are between 2048 and 5840 tested against Windows 2012R2 + * via ncacn_ip_tcp on port 135. + */ + max_req = MAX(2048, max_req); + max_rep = MIN(max_req, call->conn->max_recv_frag); + /* They are truncated to an 8 byte boundary. */ + max_rep &= 0xFFF8; + + /* max_recv_frag and max_xmit_frag result always in the same value! */ + call->conn->max_recv_frag = max_rep; + call->conn->max_xmit_frag = max_rep; + + status = call->conn->dce_ctx->callbacks.assoc_group.find(call); + if (!NT_STATUS_IS_OK(status)) { + DBG_NOTICE("Failed to find assoc_group 0x%08x: %s\n", + call->pkt.u.bind.assoc_group_id, nt_errstr(status)); + return dcesrv_bind_nak(call, 0); + } + + if (call->pkt.u.bind.num_contexts < 1) { + return dcesrv_bind_nak(call, 0); + } + + ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx, + call->pkt.u.bind.num_contexts); + if (ack_ctx_list == NULL) { + return dcesrv_bind_nak(call, 0); + } + + /* + * Set some sane defaults (required by dcesrv_negotiate_contexts()/ + * dcesrv_check_or_create_context()) and do some protocol validation + * and set sane defaults. + */ + for (i = 0; i < call->pkt.u.bind.num_contexts; i++) { + const struct dcerpc_ctx_list *c = &call->pkt.u.bind.ctx_list[i]; + struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; + bool is_feature = false; + uint64_t features = 0; + + if (c->num_transfer_syntaxes == 0) { + return dcesrv_bind_nak(call, 0); + } + + a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; + a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; + + /* + * It's only treated as bind time feature request, if the first + * transfer_syntax matches, all others are ignored. + */ + is_feature = dcerpc_extract_bind_time_features(c->transfer_syntaxes[0], + &features); + if (!is_feature) { + continue; + } + + if (ack_features != NULL) { + /* + * Only one bind time feature context is allowed. + */ + return dcesrv_bind_nak(call, 0); + } + ack_features = a; + + a->result = DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK; + a->reason.negotiate = 0; + if (features & DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING) { + if (call->conn->max_auth_states != 0) { + a->reason.negotiate |= + DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING; + } + } + if (features & DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN) { + a->reason.negotiate |= + DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN; + } + + call->conn->assoc_group->bind_time_features = a->reason.negotiate; + } + + /* + * Try to negotiate one new presentation context. + * + * Deep in here we locate the iface (by uuid) that the client + * requested, from the list of interfaces on the + * call->conn->endpoint, and call iface->bind() on that iface. + * + * call->conn was set up at the accept() of the socket, and + * call->conn->endpoint has a list of interfaces restricted to + * this port or pipe. + */ + status = dcesrv_negotiate_contexts(call, &call->pkt.u.bind, ack_ctx_list); + if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) { + return dcesrv_bind_nak(call, 0); + } + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + /* + * At this point we still don't know which interface (eg + * netlogon, lsa, drsuapi) the caller requested in this bind! + * The most recently added context is available as the first + * element in the linked list at call->conn->contexts, that is + * call->conn->contexts->iface, but they may not have + * requested one at all! + */ + + if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) && + (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { + call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; + extra_flags |= DCERPC_PFC_FLAG_CONC_MPX; + } + + if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { + call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL; + } + + /* + * After finding the interface and setting up the NDR + * transport negotiation etc, handle any authentication that + * is being requested. + */ + if (!dcesrv_auth_bind(call)) { + + if (auth->auth_level == DCERPC_AUTH_LEVEL_NONE) { + /* + * With DCERPC_AUTH_LEVEL_NONE, we get the + * reject_reason in auth->auth_context_id. + */ + return dcesrv_bind_nak(call, auth->auth_context_id); + } + + /* + * This must a be a temporary failure e.g. talloc or invalid + * configuration, e.g. no machine account. + */ + return dcesrv_bind_nak(call, + DCERPC_BIND_NAK_REASON_TEMPORARY_CONGESTION); + } + + /* setup a bind_ack */ + dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); + pkt->auth_length = 0; + pkt->call_id = call->pkt.call_id; + pkt->ptype = DCERPC_PKT_BIND_ACK; + pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags; + pkt->u.bind_ack.max_xmit_frag = call->conn->max_xmit_frag; + pkt->u.bind_ack.max_recv_frag = call->conn->max_recv_frag; + pkt->u.bind_ack.assoc_group_id = call->conn->assoc_group->id; + + ep_2nd_description = call->conn->endpoint->ep_2nd_description; + if (ep_2nd_description == NULL) { + ep_2nd_description = call->conn->endpoint->ep_description; + } + + endpoint = dcerpc_binding_get_string_option( + ep_2nd_description, + "endpoint"); + if (endpoint == NULL) { + endpoint = ""; + } + + pkt->u.bind_ack.secondary_address = endpoint; + pkt->u.bind_ack.num_results = call->pkt.u.bind.num_contexts; + pkt->u.bind_ack.ctx_list = ack_ctx_list; + pkt->u.bind_ack.auth_info = data_blob_null; + + status = dcesrv_auth_prepare_bind_ack(call, pkt); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_bind_nak(call, 0); + } + + if (auth->auth_finished) { + return dcesrv_auth_reply(call); + } + + subreq = gensec_update_send(call, call->event_ctx, + auth->gensec_security, + call->in_auth_info.credentials); + if (subreq == NULL) { + return NT_STATUS_NO_MEMORY; + } + tevent_req_set_callback(subreq, dcesrv_bind_done, call); + + return dcesrv_conn_auth_wait_setup(conn); +} + +static void dcesrv_bind_done(struct tevent_req *subreq) +{ + struct dcesrv_call_state *call = + tevent_req_callback_data(subreq, + struct dcesrv_call_state); + struct dcesrv_connection *conn = call->conn; + NTSTATUS status; + + status = gensec_update_recv(subreq, call, + &call->out_auth_info->credentials); + TALLOC_FREE(subreq); + + status = dcesrv_auth_complete(call, status); + if (!NT_STATUS_IS_OK(status)) { + status = dcesrv_bind_nak(call, 0); + dcesrv_conn_auth_wait_finished(conn, status); + return; + } + + status = dcesrv_auth_reply(call); + dcesrv_conn_auth_wait_finished(conn, status); + return; +} + +static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call) +{ + struct ncacn_packet *pkt = &call->ack_pkt; + struct data_blob_list_item *rep = NULL; + NTSTATUS status; + + rep = talloc_zero(call, struct data_blob_list_item); + if (!rep) { + return NT_STATUS_NO_MEMORY; + } + + status = dcerpc_ncacn_push_auth(&rep->blob, + call, + pkt, + call->out_auth_info); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + dcerpc_set_frag_length(&rep->blob, rep->blob.length); + + DLIST_ADD_END(call->replies, rep); + dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST); + + if (call->conn->call_list && call->conn->call_list->replies) { + if (call->conn->transport.report_output_data) { + call->conn->transport.report_output_data(call->conn); + } + } + + return NT_STATUS_OK; +} + + +static void dcesrv_auth3_done(struct tevent_req *subreq); + +/* + handle a auth3 request +*/ +static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call) +{ + struct dcesrv_connection *conn = call->conn; + struct dcesrv_auth *auth = call->auth_state; + struct tevent_req *subreq = NULL; + NTSTATUS status; + + if (!auth->auth_started) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + if (auth->auth_finished) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + status = dcerpc_verify_ncacn_packet_header(&call->pkt, + DCERPC_PKT_AUTH3, + call->pkt.u.auth3.auth_info.length, + 0, /* required flags */ + DCERPC_PFC_FLAG_FIRST | + DCERPC_PFC_FLAG_LAST | + DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | + 0x08 | /* this is not defined, but should be ignored */ + DCERPC_PFC_FLAG_CONC_MPX | + DCERPC_PFC_FLAG_DID_NOT_EXECUTE | + DCERPC_PFC_FLAG_MAYBE | + DCERPC_PFC_FLAG_OBJECT_UUID); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + /* handle the auth3 in the auth code */ + if (!dcesrv_auth_prepare_auth3(call)) { + /* + * we don't send a reply to a auth3 request, + * except by a fault. + * + * In anycase we mark the connection as + * invalid. + */ + auth->auth_invalid = true; + if (call->fault_code != 0) { + return dcesrv_fault_disconnect(call, call->fault_code); + } + TALLOC_FREE(call); + return NT_STATUS_OK; + } + + subreq = gensec_update_send(call, call->event_ctx, + auth->gensec_security, + call->in_auth_info.credentials); + if (subreq == NULL) { + return NT_STATUS_NO_MEMORY; + } + tevent_req_set_callback(subreq, dcesrv_auth3_done, call); + + return dcesrv_conn_auth_wait_setup(conn); +} + +static void dcesrv_auth3_done(struct tevent_req *subreq) +{ + struct dcesrv_call_state *call = + tevent_req_callback_data(subreq, + struct dcesrv_call_state); + struct dcesrv_connection *conn = call->conn; + struct dcesrv_auth *auth = call->auth_state; + NTSTATUS status; + + status = gensec_update_recv(subreq, call, + &call->out_auth_info->credentials); + TALLOC_FREE(subreq); + + status = dcesrv_auth_complete(call, status); + if (!NT_STATUS_IS_OK(status)) { + /* + * we don't send a reply to a auth3 request, + * except by a fault. + * + * In anycase we mark the connection as + * invalid. + */ + auth->auth_invalid = true; + if (call->fault_code != 0) { + status = dcesrv_fault_disconnect(call, call->fault_code); + dcesrv_conn_auth_wait_finished(conn, status); + return; + } + TALLOC_FREE(call); + dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK); + return; + } + + /* + * we don't send a reply to a auth3 request. + */ + TALLOC_FREE(call); + dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK); + return; +} + + +static NTSTATUS dcesrv_check_or_create_context(struct dcesrv_call_state *call, + const struct dcerpc_bind *b, + const struct dcerpc_ctx_list *ctx, + struct dcerpc_ack_ctx *ack, + bool validate_only, + const struct ndr_syntax_id *supported_transfer) +{ + uint32_t if_version; + struct dcesrv_connection_context *context; + const struct dcesrv_interface *iface; + struct GUID uuid; + NTSTATUS status; + const struct ndr_syntax_id *selected_transfer = NULL; + size_t i; + bool ok; + + if (b == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + if (ctx == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + if (ctx->num_transfer_syntaxes < 1) { + return NT_STATUS_INTERNAL_ERROR; + } + if (ack == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + if (supported_transfer == NULL) { + return NT_STATUS_INTERNAL_ERROR; + } + + switch (ack->result) { + case DCERPC_BIND_ACK_RESULT_ACCEPTANCE: + case DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK: + /* + * We is already completed. + */ + return NT_STATUS_OK; + default: + break; + } + + ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; + ack->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; + + if_version = ctx->abstract_syntax.if_version; + uuid = ctx->abstract_syntax.uuid; + + iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version); + if (iface == NULL) { + char *uuid_str = GUID_string(call, &uuid); + DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version)); + talloc_free(uuid_str); + /* + * We report this only via ack->result + */ + return NT_STATUS_OK; + } + + ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; + ack->reason.value = DCERPC_BIND_ACK_REASON_TRANSFER_SYNTAXES_NOT_SUPPORTED; + + if (validate_only) { + /* + * We report this only via ack->result + */ + return NT_STATUS_OK; + } + + for (i = 0; i < ctx->num_transfer_syntaxes; i++) { + /* + * we only do NDR encoded dcerpc for now. + */ + ok = ndr_syntax_id_equal(&ctx->transfer_syntaxes[i], + supported_transfer); + if (ok) { + selected_transfer = supported_transfer; + break; + } + } + + context = dcesrv_find_context(call->conn, ctx->context_id); + if (context != NULL) { + ok = ndr_syntax_id_equal(&context->iface->syntax_id, + &ctx->abstract_syntax); + if (!ok) { + return NT_STATUS_RPC_PROTOCOL_ERROR; + } + + if (selected_transfer != NULL) { + ok = ndr_syntax_id_equal(&context->transfer_syntax, + selected_transfer); + if (!ok) { + return NT_STATUS_RPC_PROTOCOL_ERROR; + } + + ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE; + ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED; + ack->syntax = context->transfer_syntax; + } + + /* + * We report this only via ack->result + */ + return NT_STATUS_OK; + } + + if (selected_transfer == NULL) { + /* + * We report this only via ack->result + */ + return NT_STATUS_OK; + } + + ack->result = DCERPC_BIND_ACK_RESULT_USER_REJECTION; + ack->reason.value = DCERPC_BIND_ACK_REASON_LOCAL_LIMIT_EXCEEDED; + + /* add this context to the list of available context_ids */ + context = talloc_zero(call->conn, struct dcesrv_connection_context); + if (context == NULL) { + return NT_STATUS_NO_MEMORY; + } + context->conn = call->conn; + context->context_id = ctx->context_id; + context->iface = iface; + context->transfer_syntax = *selected_transfer; + DLIST_ADD(call->conn->contexts, context); + call->context = context; + talloc_set_destructor(context, dcesrv_connection_context_destructor); + + dcesrv_prepare_context_auth(call); + + /* + * Multiplex is supported by default + */ + call->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; + + status = iface->bind(context, iface); + call->context = NULL; + if (!NT_STATUS_IS_OK(status)) { + /* we don't want to trigger the iface->unbind() hook */ + context->iface = NULL; + talloc_free(context); + /* + * We report this only via ack->result + */ + return NT_STATUS_OK; + } + + ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE; + ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED; + ack->syntax = context->transfer_syntax; + return NT_STATUS_OK; +} + +static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call, + const struct dcerpc_bind *b, + struct dcerpc_ack_ctx *ack_ctx_list) +{ + NTSTATUS status; + size_t i; + bool validate_only = false; + bool preferred_ndr32; + + /* + * Try to negotiate one new presentation context, + * using our preferred transfer syntax. + */ + for (i = 0; i < b->num_contexts; i++) { + const struct dcerpc_ctx_list *c = &b->ctx_list[i]; + struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; + + status = dcesrv_check_or_create_context(call, b, c, a, + validate_only, + call->conn->preferred_transfer); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) { + /* + * We managed to negotiate one context. + * + * => we're done. + */ + validate_only = true; + } + } + + preferred_ndr32 = ndr_syntax_id_equal(&ndr_transfer_syntax_ndr, + call->conn->preferred_transfer); + if (preferred_ndr32) { + /* + * We're done. + */ + return NT_STATUS_OK; + } + + /* + * Try to negotiate one new presentation context, + * using NDR 32 as fallback. + */ + for (i = 0; i < b->num_contexts; i++) { + const struct dcerpc_ctx_list *c = &b->ctx_list[i]; + struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; + + status = dcesrv_check_or_create_context(call, b, c, a, + validate_only, + &ndr_transfer_syntax_ndr); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) { + /* + * We managed to negotiate one context. + * + * => we're done. + */ + validate_only = true; + } + } + + return NT_STATUS_OK; +} + +static void dcesrv_alter_done(struct tevent_req *subreq); + +/* + handle a alter context request +*/ +static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call) +{ + struct dcesrv_connection *conn = call->conn; + NTSTATUS status; + bool auth_ok = false; + struct ncacn_packet *pkt = &call->ack_pkt; + uint32_t extra_flags = 0; + struct dcesrv_auth *auth = call->auth_state; + struct dcerpc_ack_ctx *ack_ctx_list = NULL; + struct tevent_req *subreq = NULL; + size_t i; + + if (!call->conn->allow_alter) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + status = dcerpc_verify_ncacn_packet_header(&call->pkt, + DCERPC_PKT_ALTER, + call->pkt.u.alter.auth_info.length, + 0, /* required flags */ + DCERPC_PFC_FLAG_FIRST | + DCERPC_PFC_FLAG_LAST | + DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | + 0x08 | /* this is not defined, but should be ignored */ + DCERPC_PFC_FLAG_CONC_MPX | + DCERPC_PFC_FLAG_DID_NOT_EXECUTE | + DCERPC_PFC_FLAG_MAYBE | + DCERPC_PFC_FLAG_OBJECT_UUID); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + auth_ok = dcesrv_auth_alter(call); + if (!auth_ok) { + if (call->fault_code != 0) { + return dcesrv_fault_disconnect(call, call->fault_code); + } + } + + if (call->pkt.u.alter.num_contexts < 1) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx, + call->pkt.u.alter.num_contexts); + if (ack_ctx_list == NULL) { + return NT_STATUS_NO_MEMORY; + } + + /* + * Set some sane defaults (required by dcesrv_negotiate_contexts()/ + * dcesrv_check_or_create_context()) and do some protocol validation + * and set sane defaults. + */ + for (i = 0; i < call->pkt.u.alter.num_contexts; i++) { + const struct dcerpc_ctx_list *c = &call->pkt.u.alter.ctx_list[i]; + struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; + + if (c->num_transfer_syntaxes == 0) { + return dcesrv_fault_disconnect(call, + DCERPC_NCA_S_PROTO_ERROR); + } + + a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; + a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; + } + + /* + * Try to negotiate one new presentation context. + */ + status = dcesrv_negotiate_contexts(call, &call->pkt.u.alter, ack_ctx_list); + if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) && + (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { + call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; + extra_flags |= DCERPC_PFC_FLAG_CONC_MPX; + } + + if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { + call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL; + } + + /* handle any authentication that is being requested */ + if (!auth_ok) { + if (call->in_auth_info.auth_type != auth->auth_type) { + return dcesrv_fault_disconnect(call, + DCERPC_FAULT_SEC_PKG_ERROR); + } + return dcesrv_fault_disconnect(call, DCERPC_FAULT_ACCESS_DENIED); + } + + dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); + pkt->auth_length = 0; + pkt->call_id = call->pkt.call_id; + pkt->ptype = DCERPC_PKT_ALTER_RESP; + pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags; + pkt->u.alter_resp.max_xmit_frag = call->conn->max_xmit_frag; + pkt->u.alter_resp.max_recv_frag = call->conn->max_recv_frag; + pkt->u.alter_resp.assoc_group_id = call->conn->assoc_group->id; + pkt->u.alter_resp.secondary_address = ""; + pkt->u.alter_resp.num_results = call->pkt.u.alter.num_contexts; + pkt->u.alter_resp.ctx_list = ack_ctx_list; + pkt->u.alter_resp.auth_info = data_blob_null; + + status = dcesrv_auth_prepare_alter_ack(call, pkt); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR); + } + + if (auth->auth_finished) { + return dcesrv_auth_reply(call); + } + + subreq = gensec_update_send(call, call->event_ctx, + auth->gensec_security, + call->in_auth_info.credentials); + if (subreq == NULL) { + return NT_STATUS_NO_MEMORY; + } + tevent_req_set_callback(subreq, dcesrv_alter_done, call); + + return dcesrv_conn_auth_wait_setup(conn); +} + +static void dcesrv_alter_done(struct tevent_req *subreq) +{ + struct dcesrv_call_state *call = + tevent_req_callback_data(subreq, + struct dcesrv_call_state); + struct dcesrv_connection *conn = call->conn; + NTSTATUS status; + + status = gensec_update_recv(subreq, call, + &call->out_auth_info->credentials); + TALLOC_FREE(subreq); + + status = dcesrv_auth_complete(call, status); + if (!NT_STATUS_IS_OK(status)) { + status = dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR); + dcesrv_conn_auth_wait_finished(conn, status); + return; + } + + status = dcesrv_auth_reply(call); + dcesrv_conn_auth_wait_finished(conn, status); + return; +} + +/* + possibly save the call for inspection with ndrdump + */ +static void dcesrv_save_call(struct dcesrv_call_state *call, const char *why) +{ +#ifdef DEVELOPER + char *fname; + const char *dump_dir; + dump_dir = lpcfg_parm_string(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv", "stubs directory"); + if (!dump_dir) { + return; + } + fname = talloc_asprintf(call, "%s/RPC-%s-%u-%s.dat", + dump_dir, + call->context->iface->name, + call->pkt.u.request.opnum, + why); + if (file_save(fname, call->pkt.u.request.stub_and_verifier.data, call->pkt.u.request.stub_and_verifier.length)) { + DEBUG(0,("RPC SAVED %s\n", fname)); + } + talloc_free(fname); +#endif +} + +static NTSTATUS dcesrv_check_verification_trailer(struct dcesrv_call_state *call) +{ + TALLOC_CTX *frame = talloc_stackframe(); + const uint32_t bitmask1 = call->conn->client_hdr_signing ? + DCERPC_SEC_VT_CLIENT_SUPPORTS_HEADER_SIGNING : 0; + const struct dcerpc_sec_vt_pcontext pcontext = { + .abstract_syntax = call->context->iface->syntax_id, + .transfer_syntax = call->context->transfer_syntax, + }; + const struct dcerpc_sec_vt_header2 header2 = + dcerpc_sec_vt_header2_from_ncacn_packet(&call->pkt); + enum ndr_err_code ndr_err; + struct dcerpc_sec_verification_trailer *vt = NULL; + NTSTATUS status = NT_STATUS_OK; + bool ok; + + SMB_ASSERT(call->pkt.ptype == DCERPC_PKT_REQUEST); + + ndr_err = ndr_pop_dcerpc_sec_verification_trailer(call->ndr_pull, + frame, &vt); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + status = ndr_map_error2ntstatus(ndr_err); + goto done; + } + + ok = dcerpc_sec_verification_trailer_check(vt, &bitmask1, + &pcontext, &header2); + if (!ok) { + status = NT_STATUS_ACCESS_DENIED; + goto done; + } +done: + TALLOC_FREE(frame); + return status; +} + +/* + handle a dcerpc request packet +*/ +static NTSTATUS dcesrv_request(struct dcesrv_call_state *call) +{ + const struct dcesrv_endpoint *endpoint = call->conn->endpoint; + struct dcesrv_auth *auth = call->auth_state; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(endpoint->ep_description); + struct ndr_pull *pull; + NTSTATUS status; + + if (!auth->auth_finished) { + return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + } + + /* if authenticated, and the mech we use can't do async replies, don't use them... */ + if (auth->gensec_security != NULL && + !gensec_have_feature(auth->gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) { + call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MAY_ASYNC; + } + + if (call->context == NULL) { + return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF, + DCERPC_PFC_FLAG_DID_NOT_EXECUTE); + } + + switch (auth->auth_level) { + case DCERPC_AUTH_LEVEL_NONE: + case DCERPC_AUTH_LEVEL_PACKET: + case DCERPC_AUTH_LEVEL_INTEGRITY: + case DCERPC_AUTH_LEVEL_PRIVACY: + break; + default: + if (!call->context->allow_connect) { + char *addr; + + addr = tsocket_address_string(call->conn->remote_address, + call); + + DEBUG(2, ("%s: restrict auth_level_connect access " + "to [%s] with auth[type=0x%x,level=0x%x] " + "on [%s] from [%s]\n", + __func__, call->context->iface->name, + auth->auth_type, + auth->auth_level, + derpc_transport_string_by_transport(transport), + addr)); + return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); + } + break; + } + + if (auth->auth_level < call->context->min_auth_level) { + char *addr; + + addr = tsocket_address_string(call->conn->remote_address, call); + + DEBUG(2, ("%s: restrict access by min_auth_level[0x%x] " + "to [%s] with auth[type=0x%x,level=0x%x] " + "on [%s] from [%s]\n", + __func__, + call->context->min_auth_level, + call->context->iface->name, + auth->auth_type, + auth->auth_level, + derpc_transport_string_by_transport(transport), + addr)); + return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); + } + + pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call); + NT_STATUS_HAVE_NO_MEMORY(pull); + + pull->flags |= LIBNDR_FLAG_REF_ALLOC; + + call->ndr_pull = pull; + + if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) { + pull->flags |= LIBNDR_FLAG_BIGENDIAN; + } + + status = dcesrv_check_verification_trailer(call); + if (!NT_STATUS_IS_OK(status)) { + uint32_t faultcode = DCERPC_FAULT_OTHER; + if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) { + faultcode = DCERPC_FAULT_ACCESS_DENIED; + } + DEBUG(10, ("dcesrv_check_verification_trailer failed: %s\n", + nt_errstr(status))); + return dcesrv_fault(call, faultcode); + } + + /* unravel the NDR for the packet */ + status = call->context->iface->ndr_pull(call, call, pull, &call->r); + if (!NT_STATUS_IS_OK(status)) { + uint8_t extra_flags = 0; + if (call->fault_code == DCERPC_FAULT_OP_RNG_ERROR) { + /* we got an unknown call */ + DEBUG(3,(__location__ ": Unknown RPC call %u on %s\n", + call->pkt.u.request.opnum, + call->context->iface->name)); + dcesrv_save_call(call, "unknown"); + extra_flags |= DCERPC_PFC_FLAG_DID_NOT_EXECUTE; + } else { + dcesrv_save_call(call, "pullfail"); + } + return dcesrv_fault_with_flags(call, call->fault_code, extra_flags); + } + + if (pull->offset != pull->data_size) { + dcesrv_save_call(call, "extrabytes"); + DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n", + pull->data_size - pull->offset)); + } + + /* call the dispatch function */ + status = call->context->iface->dispatch(call, call, call->r); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(5,("dcerpc fault in call %s:%02x - %s\n", + call->context->iface->name, + call->pkt.u.request.opnum, + dcerpc_errstr(pull, call->fault_code))); + return dcesrv_fault(call, call->fault_code); + } + + /* add the call to the pending list */ + dcesrv_call_set_list(call, DCESRV_LIST_PENDING_CALL_LIST); + + if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) { + return NT_STATUS_OK; + } + + return dcesrv_reply(call); +} + + +/* + remove the call from the right list when freed + */ +static int dcesrv_call_dequeue(struct dcesrv_call_state *call) +{ + dcesrv_call_set_list(call, DCESRV_LIST_NONE); + return 0; +} + +_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn) +{ + return conn->local_address; +} + +_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn) +{ + return conn->remote_address; +} + +/* + process some input to a dcerpc endpoint server. +*/ +static NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn, + struct ncacn_packet *pkt, + DATA_BLOB blob) +{ + NTSTATUS status; + struct dcesrv_call_state *call; + struct dcesrv_call_state *existing = NULL; + size_t num_auth_ctx = 0; + enum dcerpc_AuthType auth_type = 0; + enum dcerpc_AuthLevel auth_level = 0; + uint32_t auth_context_id = 0; + + call = talloc_zero(dce_conn, struct dcesrv_call_state); + if (!call) { + data_blob_free(&blob); + talloc_free(pkt); + return NT_STATUS_NO_MEMORY; + } + call->conn = dce_conn; + call->event_ctx = dce_conn->event_ctx; + call->state_flags = call->conn->state_flags; + call->time = timeval_current(); + call->list = DCESRV_LIST_NONE; + + talloc_steal(call, pkt); + talloc_steal(call, blob.data); + call->pkt = *pkt; + + if (dce_conn->max_auth_states == 0) { + call->auth_state = dce_conn->default_auth_state; + } else if (call->pkt.auth_length == 0) { + if (call->pkt.ptype == DCERPC_PKT_REQUEST && + dce_conn->default_auth_level_connect != NULL) + { + call->auth_state = dce_conn->default_auth_level_connect; + } else { + call->auth_state = dce_conn->default_auth_state; + } + } + + if (call->auth_state == NULL) { + struct dcesrv_auth *a = NULL; + + auth_type = dcerpc_get_auth_type(&blob); + auth_level = dcerpc_get_auth_level(&blob); + auth_context_id = dcerpc_get_auth_context_id(&blob); + + if (call->pkt.ptype == DCERPC_PKT_REQUEST) { + dce_conn->default_auth_level_connect = NULL; + if (auth_level == DCERPC_AUTH_LEVEL_CONNECT) { + dce_conn->got_explicit_auth_level_connect = true; + } + } + + for (a = dce_conn->auth_states; a != NULL; a = a->next) { + num_auth_ctx++; + + if (a->auth_type != auth_type) { + continue; + } + if (a->auth_finished && a->auth_level != auth_level) { + continue; + } + if (a->auth_context_id != auth_context_id) { + continue; + } + + DLIST_PROMOTE(dce_conn->auth_states, a); + call->auth_state = a; + break; + } + } + + if (call->auth_state == NULL) { + struct dcesrv_auth *a = NULL; + + if (num_auth_ctx >= dce_conn->max_auth_states) { + return dcesrv_fault_disconnect(call, + DCERPC_NCA_S_PROTO_ERROR); + } + + a = dcesrv_auth_create(dce_conn); + if (a == NULL) { + talloc_free(call); + return NT_STATUS_NO_MEMORY; + } + DLIST_ADD(dce_conn->auth_states, a); + if (call->pkt.ptype == DCERPC_PKT_REQUEST) { + /* + * This can never be valid. + */ + a->auth_invalid = true; + } + call->auth_state = a; + } + + talloc_set_destructor(call, dcesrv_call_dequeue); + + if (call->conn->allow_bind) { + /* + * Only one bind is possible per connection + */ + call->conn->allow_bind = false; + return dcesrv_bind(call); + } + + /* we have to check the signing here, before combining the + pdus */ + if (call->pkt.ptype == DCERPC_PKT_REQUEST) { + dcesrv_default_auth_state_prepare_request(call); + + if (call->auth_state->auth_started && + !call->auth_state->auth_finished) { + return dcesrv_fault_disconnect(call, + DCERPC_NCA_S_PROTO_ERROR); + } + + status = dcerpc_verify_ncacn_packet_header(&call->pkt, + DCERPC_PKT_REQUEST, + call->pkt.u.request.stub_and_verifier.length, + 0, /* required_flags */ + DCERPC_PFC_FLAG_FIRST | + DCERPC_PFC_FLAG_LAST | + DCERPC_PFC_FLAG_PENDING_CANCEL | + 0x08 | /* this is not defined, but should be ignored */ + DCERPC_PFC_FLAG_CONC_MPX | + DCERPC_PFC_FLAG_DID_NOT_EXECUTE | + DCERPC_PFC_FLAG_MAYBE | + DCERPC_PFC_FLAG_OBJECT_UUID); + if (!NT_STATUS_IS_OK(status)) { + return dcesrv_fault_disconnect(call, + DCERPC_NCA_S_PROTO_ERROR); + } + + if (call->pkt.frag_length > DCERPC_FRAG_MAX_SIZE) { + /* + * We don't use dcesrv_fault_disconnect() + * here, because we don't want to set + * DCERPC_PFC_FLAG_DID_NOT_EXECUTE + * + * Note that we don't check against the negotiated + * max_recv_frag, but a hard coded value. + */ + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - frag_length too large"); + return dcesrv_fault(call, + DCERPC_NCA_S_PROTO_ERROR); + } + + if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST) { + if (dce_conn->pending_call_list != NULL) { + /* + * concurrent requests are only allowed + * if DCERPC_PFC_FLAG_CONC_MPX was negotiated. + */ + if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - " + "existing pending call without CONN_MPX"); + return dcesrv_fault(call, + DCERPC_NCA_S_PROTO_ERROR); + } + } + /* only one request is possible in the fragmented list */ + if (dce_conn->incoming_fragmented_call_list != NULL) { + if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { + /* + * Without DCERPC_PFC_FLAG_CONC_MPX + * we need to return the FAULT on the + * already existing call. + * + * This is important to get the + * call_id and context_id right. + */ + TALLOC_FREE(call); + call = dce_conn->incoming_fragmented_call_list; + } + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - " + "existing fragmented call"); + return dcesrv_fault(call, + DCERPC_NCA_S_PROTO_ERROR); + } + if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_PENDING_CANCEL) { + return dcesrv_fault_disconnect(call, + DCERPC_FAULT_NO_CALL_ACTIVE); + } + call->context = dcesrv_find_context(call->conn, + call->pkt.u.request.context_id); + if (call->context == NULL) { + return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF, + DCERPC_PFC_FLAG_DID_NOT_EXECUTE); + } + } else { + const struct dcerpc_request *nr = &call->pkt.u.request; + const struct dcerpc_request *er = NULL; + int cmp; + + existing = dcesrv_find_fragmented_call(dce_conn, + call->pkt.call_id); + if (existing == NULL) { + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - " + "no existing fragmented call"); + return dcesrv_fault(call, + DCERPC_NCA_S_PROTO_ERROR); + } + er = &existing->pkt.u.request; + + if (call->pkt.ptype != existing->pkt.ptype) { + /* trying to play silly buggers are we? */ + return dcesrv_fault_disconnect(existing, + DCERPC_NCA_S_PROTO_ERROR); + } + cmp = memcmp(call->pkt.drep, existing->pkt.drep, + sizeof(pkt->drep)); + if (cmp != 0) { + return dcesrv_fault_disconnect(existing, + DCERPC_NCA_S_PROTO_ERROR); + } + if (nr->context_id != er->context_id) { + return dcesrv_fault_disconnect(existing, + DCERPC_NCA_S_PROTO_ERROR); + } + if (nr->opnum != er->opnum) { + return dcesrv_fault_disconnect(existing, + DCERPC_NCA_S_PROTO_ERROR); + } + } + } + + if (call->pkt.ptype == DCERPC_PKT_REQUEST) { + bool ok; + uint8_t payload_offset = DCERPC_REQUEST_LENGTH; + + if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) { + payload_offset += 16; + } + + ok = dcesrv_auth_pkt_pull(call, &blob, + 0, /* required_flags */ + DCERPC_PFC_FLAG_FIRST | + DCERPC_PFC_FLAG_LAST | + DCERPC_PFC_FLAG_PENDING_CANCEL | + 0x08 | /* this is not defined, but should be ignored */ + DCERPC_PFC_FLAG_CONC_MPX | + DCERPC_PFC_FLAG_DID_NOT_EXECUTE | + DCERPC_PFC_FLAG_MAYBE | + DCERPC_PFC_FLAG_OBJECT_UUID, + payload_offset, + &call->pkt.u.request.stub_and_verifier); + if (!ok) { + /* + * We don't use dcesrv_fault_disconnect() + * here, because we don't want to set + * DCERPC_PFC_FLAG_DID_NOT_EXECUTE + */ + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - failed"); + if (call->fault_code == 0) { + call->fault_code = DCERPC_FAULT_ACCESS_DENIED; + } + return dcesrv_fault(call, call->fault_code); + } + } + + /* see if this is a continued packet */ + if (existing != NULL) { + struct dcerpc_request *er = &existing->pkt.u.request; + const struct dcerpc_request *nr = &call->pkt.u.request; + size_t available; + size_t alloc_size; + size_t alloc_hint; + + /* + * Up to 4 MByte are allowed by all fragments + */ + available = dce_conn->max_total_request_size; + if (er->stub_and_verifier.length > available) { + dcesrv_call_disconnect_after(existing, + "dcesrv_auth_request - existing payload too large"); + return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); + } + available -= er->stub_and_verifier.length; + if (nr->alloc_hint > available) { + dcesrv_call_disconnect_after(existing, + "dcesrv_auth_request - alloc hint too large"); + return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); + } + if (nr->stub_and_verifier.length > available) { + dcesrv_call_disconnect_after(existing, + "dcesrv_auth_request - new payload too large"); + return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); + } + alloc_hint = er->stub_and_verifier.length + nr->alloc_hint; + /* allocate at least 1 byte */ + alloc_hint = MAX(alloc_hint, 1); + alloc_size = er->stub_and_verifier.length + + nr->stub_and_verifier.length; + alloc_size = MAX(alloc_size, alloc_hint); + + er->stub_and_verifier.data = + talloc_realloc(existing, + er->stub_and_verifier.data, + uint8_t, alloc_size); + if (er->stub_and_verifier.data == NULL) { + TALLOC_FREE(call); + return dcesrv_fault_with_flags(existing, + DCERPC_FAULT_OUT_OF_RESOURCES, + DCERPC_PFC_FLAG_DID_NOT_EXECUTE); + } + memcpy(er->stub_and_verifier.data + + er->stub_and_verifier.length, + nr->stub_and_verifier.data, + nr->stub_and_verifier.length); + er->stub_and_verifier.length += nr->stub_and_verifier.length; + + existing->pkt.pfc_flags |= (call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST); + + TALLOC_FREE(call); + call = existing; + } + + /* this may not be the last pdu in the chain - if its isn't then + just put it on the incoming_fragmented_call_list and wait for the rest */ + if (call->pkt.ptype == DCERPC_PKT_REQUEST && + !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) { + /* + * Up to 4 MByte are allowed by all fragments + */ + if (call->pkt.u.request.alloc_hint > dce_conn->max_total_request_size) { + dcesrv_call_disconnect_after(call, + "dcesrv_auth_request - initial alloc hint too large"); + return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); + } + dcesrv_call_set_list(call, DCESRV_LIST_FRAGMENTED_CALL_LIST); + return NT_STATUS_OK; + } + + /* This removes any fragments we may have had stashed away */ + dcesrv_call_set_list(call, DCESRV_LIST_NONE); + + switch (call->pkt.ptype) { + case DCERPC_PKT_BIND: + status = dcesrv_bind_nak(call, + DCERPC_BIND_NAK_REASON_NOT_SPECIFIED); + break; + case DCERPC_PKT_AUTH3: + status = dcesrv_auth3(call); + break; + case DCERPC_PKT_ALTER: + status = dcesrv_alter(call); + break; + case DCERPC_PKT_REQUEST: + status = dcesrv_request(call); + break; + case DCERPC_PKT_CO_CANCEL: + case DCERPC_PKT_ORPHANED: + /* + * Window just ignores CO_CANCEL and ORPHANED, + * so we do... + */ + status = NT_STATUS_OK; + TALLOC_FREE(call); + break; + case DCERPC_PKT_BIND_ACK: + case DCERPC_PKT_BIND_NAK: + case DCERPC_PKT_ALTER_RESP: + case DCERPC_PKT_RESPONSE: + case DCERPC_PKT_FAULT: + case DCERPC_PKT_SHUTDOWN: + default: + status = dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); + break; + } + + /* if we are going to be sending a reply then add + it to the list of pending calls. We add it to the end to keep the call + list in the order we will answer */ + if (!NT_STATUS_IS_OK(status)) { + talloc_free(call); + } + + return status; +} + +_PUBLIC_ NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx, + struct loadparm_context *lp_ctx, + const char **endpoint_servers, + struct dcesrv_context_callbacks *cb, + struct dcesrv_context **_dce_ctx) +{ + NTSTATUS status; + struct dcesrv_context *dce_ctx; + int i; + + if (!endpoint_servers) { + DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n")); + return NT_STATUS_INTERNAL_ERROR; + } + + dce_ctx = talloc_zero(mem_ctx, struct dcesrv_context); + NT_STATUS_HAVE_NO_MEMORY(dce_ctx); + + if (uid_wrapper_enabled()) { + setenv("UID_WRAPPER_MYUID", "1", 1); + } + dce_ctx->initial_euid = geteuid(); + if (uid_wrapper_enabled()) { + unsetenv("UID_WRAPPER_MYUID"); + } + + dce_ctx->endpoint_list = NULL; + dce_ctx->lp_ctx = lp_ctx; + dce_ctx->assoc_groups_idr = idr_init(dce_ctx); + NT_STATUS_HAVE_NO_MEMORY(dce_ctx->assoc_groups_idr); + dce_ctx->broken_connections = NULL; + if (cb != NULL) { + dce_ctx->callbacks = *cb; + } + + for (i=0;endpoint_servers[i];i++) { + const struct dcesrv_endpoint_server *ep_server; + + ep_server = dcesrv_ep_server_byname(endpoint_servers[i]); + if (!ep_server) { + DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i])); + return NT_STATUS_INTERNAL_ERROR; + } + + status = ep_server->init_server(dce_ctx, ep_server); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i], + nt_errstr(status))); + return status; + } + } + + *_dce_ctx = dce_ctx; + return NT_STATUS_OK; +} + +/* the list of currently registered DCERPC endpoint servers. + */ +static struct ep_server { + struct dcesrv_endpoint_server *ep_server; +} *ep_servers = NULL; +static int num_ep_servers; + +/* + register a DCERPC endpoint server. + + The 'name' can be later used by other backends to find the operations + structure for this backend. + +*/ +_PUBLIC_ NTSTATUS dcerpc_register_ep_server(const struct dcesrv_endpoint_server *ep_server) +{ + + if (dcesrv_ep_server_byname(ep_server->name) != NULL) { + /* its already registered! */ + DEBUG(0,("DCERPC endpoint server '%s' already registered\n", + ep_server->name)); + return NT_STATUS_OBJECT_NAME_COLLISION; + } + + ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1); + if (!ep_servers) { + smb_panic("out of memory in dcerpc_register"); + } + + ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server)); + ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name); + + num_ep_servers++; + + DEBUG(3,("DCERPC endpoint server '%s' registered\n", + ep_server->name)); + + return NT_STATUS_OK; +} + +/* + return the operations structure for a named backend of the specified type +*/ +_PUBLIC_ const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name) +{ + int i; + + for (i=0;iname, name) == 0) { + return ep_servers[i].ep_server; + } + } + + return NULL; +} + +/* + return the DCERPC module version, and the size of some critical types + This can be used by endpoint server modules to either detect compilation errors, or provide + multiple implementations for different smbd compilation options in one module +*/ +const struct dcesrv_critical_sizes *dcerpc_module_version(void) +{ + static const struct dcesrv_critical_sizes critical_sizes = { + DCERPC_MODULE_VERSION, + sizeof(struct dcesrv_context), + sizeof(struct dcesrv_endpoint), + sizeof(struct dcesrv_endpoint_server), + sizeof(struct dcesrv_interface), + sizeof(struct dcesrv_if_list), + sizeof(struct dcesrv_connection), + sizeof(struct dcesrv_call_state), + sizeof(struct dcesrv_auth), + sizeof(struct dcesrv_handle) + }; + + return &critical_sizes; +} + +_PUBLIC_ void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason) +{ + struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; + struct dcesrv_auth *a = NULL; + + dce_conn->wait_send = NULL; + dce_conn->wait_recv = NULL; + dce_conn->wait_private = NULL; + + dce_conn->allow_bind = false; + dce_conn->allow_alter = false; + + dce_conn->default_auth_state->auth_invalid = true; + + for (a = dce_conn->auth_states; a != NULL; a = a->next) { + a->auth_invalid = true; + } + + if (dce_conn->pending_call_list == NULL) { + char *full_reason = talloc_asprintf(dce_conn, "dcesrv: %s", reason); + + DLIST_REMOVE(dce_ctx->broken_connections, dce_conn); + dce_conn->transport.terminate_connection(dce_conn, + full_reason ? full_reason : reason); + return; + } + + if (dce_conn->terminate != NULL) { + return; + } + + DEBUG(3,("dcesrv: terminating connection due to '%s' deferred due to pending calls\n", + reason)); + dce_conn->terminate = talloc_strdup(dce_conn, reason); + if (dce_conn->terminate == NULL) { + dce_conn->terminate = "dcesrv: deferred terminating connection - no memory"; + } + DLIST_ADD_END(dce_ctx->broken_connections, dce_conn); +} + +_PUBLIC_ void dcesrv_cleanup_broken_connections(struct dcesrv_context *dce_ctx) +{ + struct dcesrv_connection *cur, *next; + + next = dce_ctx->broken_connections; + while (next != NULL) { + cur = next; + next = cur->next; + + if (cur->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { + struct dcesrv_connection_context *context_cur, *context_next; + + context_next = cur->contexts; + while (context_next != NULL) { + context_cur = context_next; + context_next = context_cur->next; + + dcesrv_connection_context_destructor(context_cur); + } + } + + dcesrv_terminate_connection(cur, cur->terminate); + } +} + +/* We need this include to be able to compile on some plateforms + * (ie. freebsd 7.2) as it seems that is not included + * correctly. + * It has to be that deep because otherwise we have a conflict on + * const struct dcesrv_interface declaration. + * This is mostly due to socket_wrapper defining #define bind swrap_bind + * which conflict with the bind used before. + */ +#include "system/network.h" + +struct dcesrv_sock_reply_state { + struct dcesrv_connection *dce_conn; + struct dcesrv_call_state *call; + struct iovec iov; +}; + +static void dcesrv_sock_reply_done(struct tevent_req *subreq); +static void dcesrv_call_terminate_step1(struct tevent_req *subreq); + +_PUBLIC_ void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn) +{ + struct dcesrv_call_state *call; + + call = dce_conn->call_list; + if (!call || !call->replies) { + return; + } + + while (call->replies) { + struct data_blob_list_item *rep = call->replies; + struct dcesrv_sock_reply_state *substate; + struct tevent_req *subreq; + + substate = talloc_zero(call, struct dcesrv_sock_reply_state); + if (!substate) { + dcesrv_terminate_connection(dce_conn, "no memory"); + return; + } + + substate->dce_conn = dce_conn; + substate->call = NULL; + + DLIST_REMOVE(call->replies, rep); + + if (call->replies == NULL && call->terminate_reason == NULL) { + substate->call = call; + } + + substate->iov.iov_base = (void *) rep->blob.data; + substate->iov.iov_len = rep->blob.length; + + subreq = tstream_writev_queue_send(substate, + dce_conn->event_ctx, + dce_conn->stream, + dce_conn->send_queue, + &substate->iov, 1); + if (!subreq) { + dcesrv_terminate_connection(dce_conn, "no memory"); + return; + } + tevent_req_set_callback(subreq, dcesrv_sock_reply_done, + substate); + } + + if (call->terminate_reason != NULL) { + struct tevent_req *subreq; + + subreq = tevent_queue_wait_send(call, + dce_conn->event_ctx, + dce_conn->send_queue); + if (!subreq) { + dcesrv_terminate_connection(dce_conn, __location__); + return; + } + tevent_req_set_callback(subreq, dcesrv_call_terminate_step1, + call); + } + + DLIST_REMOVE(call->conn->call_list, call); + call->list = DCESRV_LIST_NONE; +} + +static void dcesrv_sock_reply_done(struct tevent_req *subreq) +{ + struct dcesrv_sock_reply_state *substate = tevent_req_callback_data(subreq, + struct dcesrv_sock_reply_state); + int ret; + int sys_errno; + NTSTATUS status; + struct dcesrv_call_state *call = substate->call; + + ret = tstream_writev_queue_recv(subreq, &sys_errno); + TALLOC_FREE(subreq); + if (ret == -1) { + status = map_nt_error_from_unix_common(sys_errno); + dcesrv_terminate_connection(substate->dce_conn, nt_errstr(status)); + return; + } + + talloc_free(substate); + if (call) { + talloc_free(call); + } +} + +static void dcesrv_call_terminate_step2(struct tevent_req *subreq); + +static void dcesrv_call_terminate_step1(struct tevent_req *subreq) +{ + struct dcesrv_call_state *call = tevent_req_callback_data(subreq, + struct dcesrv_call_state); + bool ok; + struct timeval tv; + + /* make sure we stop send queue before removing subreq */ + tevent_queue_stop(call->conn->send_queue); + + ok = tevent_queue_wait_recv(subreq); + TALLOC_FREE(subreq); + if (!ok) { + dcesrv_terminate_connection(call->conn, __location__); + return; + } + + /* disconnect after 200 usecs */ + tv = timeval_current_ofs_usec(200); + subreq = tevent_wakeup_send(call, call->conn->event_ctx, tv); + if (subreq == NULL) { + dcesrv_terminate_connection(call->conn, __location__); + return; + } + tevent_req_set_callback(subreq, dcesrv_call_terminate_step2, + call); +} + +static void dcesrv_call_terminate_step2(struct tevent_req *subreq) +{ + struct dcesrv_call_state *call = tevent_req_callback_data(subreq, + struct dcesrv_call_state); + bool ok; + + ok = tevent_wakeup_recv(subreq); + TALLOC_FREE(subreq); + if (!ok) { + dcesrv_terminate_connection(call->conn, __location__); + return; + } + + dcesrv_terminate_connection(call->conn, call->terminate_reason); +} + +static void dcesrv_conn_wait_done(struct tevent_req *subreq); + +static void dcesrv_read_fragment_done(struct tevent_req *subreq) +{ + struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq, + struct dcesrv_connection); + struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; + struct ncacn_packet *pkt; + DATA_BLOB buffer; + NTSTATUS status; + + if (dce_conn->terminate) { + /* + * if the current connection is broken + * we need to clean it up before any other connection + */ + dcesrv_terminate_connection(dce_conn, dce_conn->terminate); + dcesrv_cleanup_broken_connections(dce_ctx); + return; + } + + dcesrv_cleanup_broken_connections(dce_ctx); + + status = dcerpc_read_ncacn_packet_recv(subreq, dce_conn, + &pkt, &buffer); + TALLOC_FREE(subreq); + if (!NT_STATUS_IS_OK(status)) { + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } + + status = dcesrv_process_ncacn_packet(dce_conn, pkt, buffer); + if (!NT_STATUS_IS_OK(status)) { + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } + + /* + * This is used to block the connection during + * pending authentication. + */ + if (dce_conn->wait_send != NULL) { + subreq = dce_conn->wait_send(dce_conn, + dce_conn->event_ctx, + dce_conn->wait_private); + if (!subreq) { + status = NT_STATUS_NO_MEMORY; + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } + tevent_req_set_callback(subreq, dcesrv_conn_wait_done, dce_conn); + return; + } + + subreq = dcerpc_read_ncacn_packet_send(dce_conn, + dce_conn->event_ctx, + dce_conn->stream); + if (!subreq) { + status = NT_STATUS_NO_MEMORY; + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } + tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dce_conn); +} + +static void dcesrv_conn_wait_done(struct tevent_req *subreq) +{ + struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq, + struct dcesrv_connection); + struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; + NTSTATUS status; + + if (dce_conn->terminate) { + /* + * if the current connection is broken + * we need to clean it up before any other connection + */ + dcesrv_terminate_connection(dce_conn, dce_conn->terminate); + dcesrv_cleanup_broken_connections(dce_ctx); + return; + } + + dcesrv_cleanup_broken_connections(dce_ctx); + + status = dce_conn->wait_recv(subreq); + dce_conn->wait_send = NULL; + dce_conn->wait_recv = NULL; + dce_conn->wait_private = NULL; + TALLOC_FREE(subreq); + if (!NT_STATUS_IS_OK(status)) { + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } + + status = dcesrv_connection_loop_start(dce_conn); + if (!NT_STATUS_IS_OK(status)) { + dcesrv_terminate_connection(dce_conn, nt_errstr(status)); + return; + } +} + +/** + * retrieve credentials from a dce_call + */ +_PUBLIC_ struct cli_credentials *dcesrv_call_credentials(struct dcesrv_call_state *dce_call) +{ + struct dcesrv_auth *auth = dce_call->auth_state; + SMB_ASSERT(auth->auth_finished); + return auth->session_info->credentials; +} + +/** + * returns true if this is an authenticated call + */ +_PUBLIC_ bool dcesrv_call_authenticated(struct dcesrv_call_state *dce_call) +{ + struct dcesrv_auth *auth = dce_call->auth_state; + enum security_user_level level; + SMB_ASSERT(auth->auth_finished); + level = security_session_user_level(auth->session_info, NULL); + return level >= SECURITY_USER; +} + +/** + * retrieve account_name for a dce_call + */ +_PUBLIC_ const char *dcesrv_call_account_name(struct dcesrv_call_state *dce_call) +{ + struct dcesrv_auth *auth = dce_call->auth_state; + SMB_ASSERT(auth->auth_finished); + return auth->session_info->info->account_name; +} + +/** + * retrieve session_info from a dce_call + */ +_PUBLIC_ struct auth_session_info *dcesrv_call_session_info(struct dcesrv_call_state *dce_call) +{ + struct dcesrv_auth *auth = dce_call->auth_state; + SMB_ASSERT(auth->auth_finished); + return auth->session_info; +} + +/** + * retrieve auth type/level from a dce_call + */ +_PUBLIC_ void dcesrv_call_auth_info(struct dcesrv_call_state *dce_call, + enum dcerpc_AuthType *auth_type, + enum dcerpc_AuthLevel *auth_level) +{ + struct dcesrv_auth *auth = dce_call->auth_state; + + SMB_ASSERT(auth->auth_finished); + + if (auth_type != NULL) { + *auth_type = auth->auth_type; + } + if (auth_level != NULL) { + *auth_level = auth->auth_level; + } +} + +_PUBLIC_ NTSTATUS dcesrv_connection_loop_start(struct dcesrv_connection *conn) +{ + struct tevent_req *subreq; + + subreq = dcerpc_read_ncacn_packet_send(conn, + conn->event_ctx, + conn->stream); + if (subreq == NULL) { + return NT_STATUS_NO_MEMORY; + } + tevent_req_set_callback(subreq, dcesrv_read_fragment_done, conn); + + return NT_STATUS_OK; +} diff --git a/source4/rpc_server/dcesrv_mgmt.c b/librpc/rpc/dcesrv_mgmt.c similarity index 93% rename from source4/rpc_server/dcesrv_mgmt.c rename to librpc/rpc/dcesrv_mgmt.c index e520a34f0bd..80e78d56b0e 100644 --- a/source4/rpc_server/dcesrv_mgmt.c +++ b/librpc/rpc/dcesrv_mgmt.c @@ -1,27 +1,27 @@ -/* +/* Unix SMB/CIFS implementation. endpoint server for the mgmt pipe Copyright (C) Jelmer Vernooij 2006 - + 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 . */ #include "includes.h" -#include "rpc_server/dcerpc_server.h" -#include "rpc_server/dcerpc_server_proto.h" +#include "librpc/rpc/dcesrv_core.h" +#include "librpc/rpc/dcesrv_core_proto.h" #include "librpc/gen_ndr/ndr_mgmt.h" #define DCESRV_INTERFACE_MGMT_BIND(context, iface) \ @@ -42,8 +42,8 @@ static NTSTATUS dcesrv_interface_mgmt_bind(struct dcesrv_connection_context *con return dcesrv_interface_bind_allow_connect(context, iface); } -/* - mgmt_inq_if_ids +/* + mgmt_inq_if_ids */ static WERROR dcesrv_mgmt_inq_if_ids(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct mgmt_inq_if_ids *r) @@ -64,8 +64,8 @@ static WERROR dcesrv_mgmt_inq_if_ids(struct dcesrv_call_state *dce_call, TALLOC_ } -/* - mgmt_inq_stats +/* + mgmt_inq_stats */ static WERROR dcesrv_mgmt_inq_stats(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct mgmt_inq_stats *r) @@ -85,8 +85,8 @@ static WERROR dcesrv_mgmt_inq_stats(struct dcesrv_call_state *dce_call, TALLOC_C } -/* - mgmt_is_server_listening +/* + mgmt_is_server_listening */ static uint32_t dcesrv_mgmt_is_server_listening(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct mgmt_is_server_listening *r) @@ -96,8 +96,8 @@ static uint32_t dcesrv_mgmt_is_server_listening(struct dcesrv_call_state *dce_ca } -/* - mgmt_stop_server_listening +/* + mgmt_stop_server_listening */ static WERROR dcesrv_mgmt_stop_server_listening(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct mgmt_stop_server_listening *r) @@ -106,8 +106,8 @@ static WERROR dcesrv_mgmt_stop_server_listening(struct dcesrv_call_state *dce_ca } -/* - mgmt_inq_princ_name +/* + mgmt_inq_princ_name */ static WERROR dcesrv_mgmt_inq_princ_name(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct mgmt_inq_princ_name *r) diff --git a/source4/rpc_server/dcesrv_reply.c b/librpc/rpc/dcesrv_reply.c similarity index 98% rename from source4/rpc_server/dcesrv_reply.c rename to librpc/rpc/dcesrv_reply.c index b1abd9d87ab..a217d5a5610 100644 --- a/source4/rpc_server/dcesrv_reply.c +++ b/librpc/rpc/dcesrv_reply.c @@ -21,12 +21,11 @@ */ #include "includes.h" +#include "librpc/rpc/dcesrv_core.h" +#include "librpc/rpc/dcesrv_core_proto.h" #include "auth/gensec/gensec.h" #include "lib/util/dlinklist.h" -#include "rpc_server/dcerpc_server.h" -#include "rpc_server/dcerpc_server_proto.h" #include "param/param.h" -#include "librpc/rpc/rpc_common.h" /* move a call from an existing linked list to the specified list. This diff --git a/librpc/wscript_build b/librpc/wscript_build index 812697f3eae..5c4bedc5d7b 100644 --- a/librpc/wscript_build +++ b/librpc/wscript_build @@ -635,6 +635,9 @@ bld.SAMBA_LIBRARY('dcerpc-binding', bld.SAMBA_LIBRARY('dcerpc-server-core', source=''' rpc/dcesrv_core.c + rpc/dcesrv_auth.c + rpc/dcesrv_mgmt.c + rpc/dcesrv_reply.c ''', deps='ndr dcerpc-binding', pc_files=[], diff --git a/source4/rpc_server/dcerpc_server.c b/source4/rpc_server/dcerpc_server.c index 77dc81aeabc..ffdf34f02f8 100644 --- a/source4/rpc_server/dcerpc_server.c +++ b/source4/rpc_server/dcerpc_server.c @@ -24,28 +24,16 @@ #include "auth/auth.h" #include "auth/gensec/gensec.h" #include "auth/credentials/credentials.h" -#include "lib/util/dlinklist.h" #include "rpc_server/dcerpc_server.h" #include "rpc_server/dcerpc_server_proto.h" -#include "system/filesys.h" -#include "libcli/security/security.h" #include "param/param.h" -#include "lib/tsocket/tsocket.h" -#include "libcli/named_pipe_auth/npa_tstream.h" #include "smbd/service_stream.h" #include "lib/tsocket/tsocket.h" #include "lib/socket/socket.h" #include "smbd/process_model.h" -#include "lib/messaging/irpc.h" -#include "librpc/rpc/rpc_common.h" #include "lib/util/samba_modules.h" -#include "librpc/gen_ndr/ndr_dcerpc.h" #include "lib/util/tevent_ntstatus.h" -static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call, - const struct dcerpc_bind *b, - struct dcerpc_ack_ctx *ack_ctx_list); - /* take a reference to an existing association group */ @@ -80,2446 +68,98 @@ static struct dcesrv_assoc_group *dcesrv_assoc_group_reference(struct dcesrv_con return NULL; } - return talloc_reference(conn, assoc_group); -} - -static int dcesrv_assoc_group_destructor(struct dcesrv_assoc_group *assoc_group) -{ - int ret; - ret = idr_remove(assoc_group->dce_ctx->assoc_groups_idr, assoc_group->id); - if (ret != 0) { - DEBUG(0,(__location__ ": Failed to remove assoc_group 0x%08x\n", - assoc_group->id)); - } - return 0; -} - -/* - allocate a new association group - */ -static struct dcesrv_assoc_group *dcesrv_assoc_group_new(struct dcesrv_connection *conn) -{ - struct dcesrv_context *dce_ctx = conn->dce_ctx; - const struct dcesrv_endpoint *endpoint = conn->endpoint; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(endpoint->ep_description); - struct dcesrv_assoc_group *assoc_group; - int id; - - assoc_group = talloc_zero(conn, struct dcesrv_assoc_group); - if (assoc_group == NULL) { - return NULL; - } - - id = idr_get_new_random(dce_ctx->assoc_groups_idr, assoc_group, UINT16_MAX); - if (id == -1) { - talloc_free(assoc_group); - DEBUG(0,(__location__ ": Out of association groups!\n")); - return NULL; - } - - assoc_group->transport = transport; - assoc_group->id = id; - assoc_group->dce_ctx = dce_ctx; - - talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor); - - return assoc_group; -} - -NTSTATUS dcesrv_assoc_group_find(struct dcesrv_call_state *call) -{ - /* - if provided, check the assoc_group is valid - */ - if (call->pkt.u.bind.assoc_group_id != 0) { - call->conn->assoc_group = - dcesrv_assoc_group_reference(call->conn, - call->pkt.u.bind.assoc_group_id); - } else { - call->conn->assoc_group = dcesrv_assoc_group_new(call->conn); - } - - /* - * The NETLOGON server does not use handles and so - * there is no need to support association groups, but - * we need to give back a number regardless. - * - * We have to do this when it is not run as a single process, - * because then it can't see the other valid association - * groups. We handle this genericly for all endpoints not - * running in single process mode. - * - * We know which endpoint we are on even before checking the - * iface UUID, so for simplicity we enforce the same policy - * for all interfaces on the endpoint. - * - * This means that where NETLOGON - * shares an endpoint (such as ncalrpc or of 'lsa over - * netlogon' is set) we will still check association groups. - * - */ - - if (call->conn->assoc_group == NULL && - !call->conn->endpoint->use_single_process) { - call->conn->assoc_group - = dcesrv_assoc_group_new(call->conn); - } - - if (call->conn->assoc_group == NULL) { - /* TODO Return correct status */ - return NT_STATUS_UNSUCCESSFUL; - } - - return NT_STATUS_OK; -} - -/* - see if two endpoints match -*/ -static bool endpoints_match(const struct dcerpc_binding *ep1, - const struct dcerpc_binding *ep2) -{ - enum dcerpc_transport_t t1; - enum dcerpc_transport_t t2; - const char *e1; - const char *e2; - - t1 = dcerpc_binding_get_transport(ep1); - t2 = dcerpc_binding_get_transport(ep2); - - e1 = dcerpc_binding_get_string_option(ep1, "endpoint"); - e2 = dcerpc_binding_get_string_option(ep2, "endpoint"); - - if (t1 != t2) { - return false; - } - - if (!e1 || !e2) { - return e1 == e2; - } - - if (strcasecmp(e1, e2) != 0) { - return false; - } - - return true; -} - -/* - find an endpoint in the dcesrv_context -*/ -static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx, - const struct dcerpc_binding *ep_description) -{ - struct dcesrv_endpoint *ep; - for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) { - if (endpoints_match(ep->ep_description, ep_description)) { - return ep; - } - } - return NULL; -} - -/* - find a registered context_id from a bind or alter_context -*/ -static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn, - uint16_t context_id) -{ - struct dcesrv_connection_context *c; - for (c=conn->contexts;c;c=c->next) { - if (c->context_id == context_id) return c; - } - return NULL; -} - -/* - see if a uuid and if_version match to an interface -*/ -static bool interface_match(const struct dcesrv_interface *if1, - const struct dcesrv_interface *if2) -{ - return (if1->syntax_id.if_version == if2->syntax_id.if_version && - GUID_equal(&if1->syntax_id.uuid, &if2->syntax_id.uuid)); -} - -/* - find the interface operations on any endpoint with this binding -*/ -static const struct dcesrv_interface *find_interface_by_binding(struct dcesrv_context *dce_ctx, - struct dcerpc_binding *binding, - const struct dcesrv_interface *iface) -{ - struct dcesrv_endpoint *ep; - for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) { - if (endpoints_match(ep->ep_description, binding)) { - struct dcesrv_if_list *ifl; - for (ifl=ep->interface_list; ifl; ifl=ifl->next) { - if (interface_match(&(ifl->iface), iface)) { - return &(ifl->iface); - } - } - } - } - return NULL; -} - -/* - see if a uuid and if_version match to an interface -*/ -static bool interface_match_by_uuid(const struct dcesrv_interface *iface, - const struct GUID *uuid, uint32_t if_version) -{ - return (iface->syntax_id.if_version == if_version && - GUID_equal(&iface->syntax_id.uuid, uuid)); -} - -/* - find the interface operations on an endpoint by uuid -*/ -const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint, - const struct GUID *uuid, uint32_t if_version) -{ - struct dcesrv_if_list *ifl; - for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) { - if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) { - return &(ifl->iface); - } - } - return NULL; -} - -/* - find the earlier parts of a fragmented call awaiting reassembily -*/ -static struct dcesrv_call_state *dcesrv_find_fragmented_call(struct dcesrv_connection *dce_conn, uint32_t call_id) -{ - struct dcesrv_call_state *c; - for (c=dce_conn->incoming_fragmented_call_list;c;c=c->next) { - if (c->pkt.call_id == call_id) { - return c; - } - } - return NULL; -} - -/* - register an interface on an endpoint - - An endpoint is one unix domain socket (for ncalrpc), one TCP port - (for ncacn_ip_tcp) or one (forwarded) named pipe (for ncacn_np). - - Each endpoint can have many interfaces such as netlogon, lsa or - samr. Some have essentially the full set. - - This is driven from the set of interfaces listed in each IDL file - via the PIDL generated *__op_init_server() functions. -*/ -_PUBLIC_ NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx, - const char *ep_name, - const char *ncacn_np_secondary_endpoint, - const struct dcesrv_interface *iface, - const struct security_descriptor *sd) -{ - struct dcesrv_endpoint *ep; - struct dcesrv_if_list *ifl; - struct dcerpc_binding *binding; - struct dcerpc_binding *binding2 = NULL; - bool add_ep = false; - NTSTATUS status; - enum dcerpc_transport_t transport; - char *ep_string = NULL; - bool use_single_process = true; - const char *ep_process_string; - - /* - * If we are not using handles, there is no need for force - * this service into using a single process. - * - * However, due to the way we listen for RPC packets, we can - * only do this if we have a single service per pipe or TCP - * port, so we still force a single combined process for - * ncalrpc. - */ - if (iface->flags & DCESRV_INTERFACE_FLAGS_HANDLES_NOT_USED) { - use_single_process = false; - } - - status = dcerpc_parse_binding(dce_ctx, ep_name, &binding); - - if (NT_STATUS_IS_ERR(status)) { - DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name)); - return status; - } - - transport = dcerpc_binding_get_transport(binding); - if (transport == NCACN_IP_TCP) { - int port; - char port_str[6]; - - /* - * First check if there is already a port specified, eg - * for epmapper on ncacn_ip_tcp:[135] - */ - const char *endpoint - = dcerpc_binding_get_string_option(binding, - "endpoint"); - if (endpoint == NULL) { - port = lpcfg_parm_int(dce_ctx->lp_ctx, NULL, - "rpc server port", iface->name, 0); - - /* - * For RPC services that are not set to use a single - * process, we do not default to using the 'rpc server - * port' because that would cause a double-bind on - * that port. - */ - if (port == 0 && !use_single_process) { - port = lpcfg_rpc_server_port(dce_ctx->lp_ctx); - } - if (port != 0) { - snprintf(port_str, sizeof(port_str), "%u", port); - status = dcerpc_binding_set_string_option(binding, - "endpoint", - port_str); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - } - } - } - - if (transport == NCACN_NP && ncacn_np_secondary_endpoint != NULL) { - enum dcerpc_transport_t transport2; - - status = dcerpc_parse_binding(dce_ctx, - ncacn_np_secondary_endpoint, - &binding2); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(0, ("Trouble parsing 2nd binding string '%s'\n", - ncacn_np_secondary_endpoint)); - return status; - } - - transport2 = dcerpc_binding_get_transport(binding2); - SMB_ASSERT(transport2 == transport); - } - - /* see if the interface is already registered on the endpoint */ - if (find_interface_by_binding(dce_ctx, binding, iface)!=NULL) { - DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n", - iface->name, ep_name)); - return NT_STATUS_OBJECT_NAME_COLLISION; - } - - /* check if this endpoint exists - */ - ep = find_endpoint(dce_ctx, binding); - - if (ep != NULL) { - /* - * We want a new port on ncacn_ip_tcp for NETLOGON, so - * it can be multi-process. Other processes can also - * listen on distinct ports, if they have one forced - * in the code above with eg 'rpc server port:drsuapi = 1027' - * - * If we have mulitiple endpoints on port 0, they each - * get an epemeral port (currently by walking up from - * 1024). - * - * Because one endpoint can only have one process - * model, we add a new IP_TCP endpoint for each model. - * - * This works in conjunction with the forced overwrite - * of ep->use_single_process below. - */ - if (ep->use_single_process != use_single_process - && transport == NCACN_IP_TCP) { - add_ep = true; - } - } - - if (ep == NULL || add_ep) { - ep = talloc_zero(dce_ctx, struct dcesrv_endpoint); - if (!ep) { - return NT_STATUS_NO_MEMORY; - } - ZERO_STRUCTP(ep); - ep->ep_description = talloc_move(ep, &binding); - ep->ep_2nd_description = talloc_move(ep, &binding2); - add_ep = true; - - /* add mgmt interface */ - ifl = talloc_zero(ep, struct dcesrv_if_list); - if (!ifl) { - return NT_STATUS_NO_MEMORY; - } - - ifl->iface = dcesrv_get_mgmt_interface(); - - DLIST_ADD(ep->interface_list, ifl); - } - - /* - * By default don't force into a single process, but if any - * interface on this endpoint on this service uses handles - * (most do), then we must force into single process mode - * - * By overwriting this each time a new interface is added to - * this endpoint, we end up with the most restrictive setting. - */ - if (use_single_process) { - ep->use_single_process = true; - } - - /* talloc a new interface list element */ - ifl = talloc_zero(ep, struct dcesrv_if_list); - if (!ifl) { - return NT_STATUS_NO_MEMORY; - } - - /* copy the given interface struct to the one on the endpoints interface list */ - memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface)); - - /* if we have a security descriptor given, - * we should see if we can set it up on the endpoint - */ - if (sd != NULL) { - /* if there's currently no security descriptor given on the endpoint - * we try to set it - */ - if (ep->sd == NULL) { - ep->sd = security_descriptor_copy(ep, sd); - } - - /* if now there's no security descriptor given on the endpoint - * something goes wrong, either we failed to copy the security descriptor - * or there was already one on the endpoint - */ - if (ep->sd != NULL) { - DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n" - " on endpoint '%s'\n", - iface->name, ep_name)); - if (add_ep) free(ep); - free(ifl); - return NT_STATUS_OBJECT_NAME_COLLISION; - } - } - - /* finally add the interface on the endpoint */ - DLIST_ADD(ep->interface_list, ifl); - - /* if it's a new endpoint add it to the dcesrv_context */ - if (add_ep) { - DLIST_ADD(dce_ctx->endpoint_list, ep); - } - - /* Re-get the string as we may have set a port */ - ep_string = dcerpc_binding_string(dce_ctx, ep->ep_description); - - if (use_single_process) { - ep_process_string = "single process required"; - } else { - ep_process_string = "multi process compatible"; - } - - DBG_INFO("Interface '%s' registered on endpoint '%s' (%s)\n", - iface->name, ep_string, ep_process_string); - TALLOC_FREE(ep_string); - - return NT_STATUS_OK; -} - -static NTSTATUS dcesrv_session_info_session_key(struct dcesrv_auth *auth, - DATA_BLOB *session_key) -{ - if (auth->session_info == NULL) { - return NT_STATUS_NO_USER_SESSION_KEY; - } - - if (auth->session_info->session_key.length == 0) { - return NT_STATUS_NO_USER_SESSION_KEY; - } - - *session_key = auth->session_info->session_key; - return NT_STATUS_OK; -} - -static NTSTATUS dcesrv_remote_session_key(struct dcesrv_auth *auth, - DATA_BLOB *session_key) -{ - if (auth->auth_type != DCERPC_AUTH_TYPE_NONE) { - return NT_STATUS_NO_USER_SESSION_KEY; - } - - return dcesrv_session_info_session_key(auth, session_key); -} - -static NTSTATUS dcesrv_local_fixed_session_key(struct dcesrv_auth *auth, - DATA_BLOB *session_key) -{ - return dcerpc_generic_session_key(session_key); -} - -/* - * Fetch the authentication session key if available. - * - * This is the key generated by a gensec authentication. - * - */ -_PUBLIC_ NTSTATUS dcesrv_auth_session_key(struct dcesrv_call_state *call, - DATA_BLOB *session_key) -{ - struct dcesrv_auth *auth = call->auth_state; - SMB_ASSERT(auth->auth_finished); - return dcesrv_session_info_session_key(auth, session_key); -} - -/* - * Fetch the transport session key if available. - * Typically this is the SMB session key - * or a fixed key for local transports. - * - * The key is always truncated to 16 bytes. -*/ -_PUBLIC_ NTSTATUS dcesrv_transport_session_key(struct dcesrv_call_state *call, - DATA_BLOB *session_key) -{ - struct dcesrv_auth *auth = call->auth_state; - NTSTATUS status; - - SMB_ASSERT(auth->auth_finished); - - if (auth->session_key_fn == NULL) { - return NT_STATUS_NO_USER_SESSION_KEY; - } - - status = auth->session_key_fn(auth, session_key); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - session_key->length = MIN(session_key->length, 16); - - return NT_STATUS_OK; -} - -static struct dcesrv_auth *dcesrv_auth_create(struct dcesrv_connection *conn) -{ - const struct dcesrv_endpoint *ep = conn->endpoint; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(ep->ep_description); - struct dcesrv_auth *auth = NULL; - - auth = talloc_zero(conn, struct dcesrv_auth); - if (auth == NULL) { - return NULL; - } - - switch (transport) { - case NCACN_NP: - auth->session_key_fn = dcesrv_remote_session_key; - break; - case NCALRPC: - case NCACN_UNIX_STREAM: - auth->session_key_fn = dcesrv_local_fixed_session_key; - break; - default: - /* - * All other's get a NULL pointer, which - * results in NT_STATUS_NO_USER_SESSION_KEY - */ - break; - } - - return auth; -} - -/* - connect to a dcerpc endpoint -*/ -_PUBLIC_ NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx, - TALLOC_CTX *mem_ctx, - const struct dcesrv_endpoint *ep, - struct auth_session_info *session_info, - struct tevent_context *event_ctx, - uint32_t state_flags, - struct dcesrv_connection **_p) -{ - struct dcesrv_auth *auth = NULL; - struct dcesrv_connection *p; - - if (!session_info) { - return NT_STATUS_ACCESS_DENIED; - } - - p = talloc_zero(mem_ctx, struct dcesrv_connection); - NT_STATUS_HAVE_NO_MEMORY(p); - - p->dce_ctx = dce_ctx; - p->endpoint = ep; - p->packet_log_dir = lpcfg_lock_directory(dce_ctx->lp_ctx); - p->event_ctx = event_ctx; - p->state_flags = state_flags; - p->allow_bind = true; - p->max_recv_frag = 5840; - p->max_xmit_frag = 5840; - p->max_total_request_size = DCERPC_NCACN_REQUEST_DEFAULT_MAX_SIZE; - - p->support_hdr_signing = lpcfg_parm_bool(dce_ctx->lp_ctx, - NULL, - "dcesrv", - "header signing", - true); - p->max_auth_states = lpcfg_parm_ulong(dce_ctx->lp_ctx, - NULL, - "dcesrv", - "max auth states", - 2049); - - auth = dcesrv_auth_create(p); - if (auth == NULL) { - talloc_free(p); - return NT_STATUS_NO_MEMORY; - } - - auth->session_info = talloc_reference(auth, session_info); - if (auth->session_info == NULL) { - talloc_free(p); - return NT_STATUS_NO_MEMORY; - } - - p->default_auth_state = auth; - - /* - * For now we only support NDR32. - */ - p->preferred_transfer = &ndr_transfer_syntax_ndr; - - *_p = p; - return NT_STATUS_OK; -} - -/* - move a call from an existing linked list to the specified list. This - prevents bugs where we forget to remove the call from a previous - list when moving it. - */ -static void dcesrv_call_set_list(struct dcesrv_call_state *call, - enum dcesrv_call_list list) -{ - switch (call->list) { - case DCESRV_LIST_NONE: - break; - case DCESRV_LIST_CALL_LIST: - DLIST_REMOVE(call->conn->call_list, call); - break; - case DCESRV_LIST_FRAGMENTED_CALL_LIST: - DLIST_REMOVE(call->conn->incoming_fragmented_call_list, call); - break; - case DCESRV_LIST_PENDING_CALL_LIST: - DLIST_REMOVE(call->conn->pending_call_list, call); - break; - } - call->list = list; - switch (list) { - case DCESRV_LIST_NONE: - break; - case DCESRV_LIST_CALL_LIST: - DLIST_ADD_END(call->conn->call_list, call); - break; - case DCESRV_LIST_FRAGMENTED_CALL_LIST: - DLIST_ADD_END(call->conn->incoming_fragmented_call_list, call); - break; - case DCESRV_LIST_PENDING_CALL_LIST: - DLIST_ADD_END(call->conn->pending_call_list, call); - break; - } -} - -static void dcesrv_call_disconnect_after(struct dcesrv_call_state *call, - const char *reason) -{ - struct dcesrv_auth *a = NULL; - - if (call->conn->terminate != NULL) { - return; - } - - call->conn->allow_bind = false; - call->conn->allow_alter = false; - - call->conn->default_auth_state->auth_invalid = true; - - for (a = call->conn->auth_states; a != NULL; a = a->next) { - a->auth_invalid = true; - } - - call->terminate_reason = talloc_strdup(call, reason); - if (call->terminate_reason == NULL) { - call->terminate_reason = __location__; - } -} - -/* - return a dcerpc bind_nak -*/ -static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason) -{ - struct ncacn_packet pkt; - struct dcerpc_bind_nak_version version; - struct data_blob_list_item *rep; - NTSTATUS status; - static const uint8_t _pad[3] = { 0, }; - - /* - * We add the call to the pending_call_list - * in order to defer the termination. - */ - dcesrv_call_disconnect_after(call, "dcesrv_bind_nak"); - - /* setup a bind_nak */ - dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); - pkt.auth_length = 0; - pkt.call_id = call->pkt.call_id; - pkt.ptype = DCERPC_PKT_BIND_NAK; - pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST; - pkt.u.bind_nak.reject_reason = reason; - version.rpc_vers = 5; - version.rpc_vers_minor = 0; - pkt.u.bind_nak.num_versions = 1; - pkt.u.bind_nak.versions = &version; - pkt.u.bind_nak._pad = data_blob_const(_pad, sizeof(_pad)); - - rep = talloc_zero(call, struct data_blob_list_item); - if (!rep) { - return NT_STATUS_NO_MEMORY; - } - - status = dcerpc_ncacn_push_auth(&rep->blob, call, &pkt, NULL); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - dcerpc_set_frag_length(&rep->blob, rep->blob.length); - - DLIST_ADD_END(call->replies, rep); - dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST); - - if (call->conn->call_list && call->conn->call_list->replies) { - if (call->conn->transport.report_output_data) { - call->conn->transport.report_output_data(call->conn); - } - } - - return NT_STATUS_OK; -} - -static NTSTATUS dcesrv_fault_disconnect(struct dcesrv_call_state *call, - uint32_t fault_code) -{ - /* - * We add the call to the pending_call_list - * in order to defer the termination. - */ - dcesrv_call_disconnect_after(call, "dcesrv_fault_disconnect"); - - return dcesrv_fault_with_flags(call, fault_code, - DCERPC_PFC_FLAG_DID_NOT_EXECUTE); -} - -static int dcesrv_connection_context_destructor(struct dcesrv_connection_context *c) -{ - DLIST_REMOVE(c->conn->contexts, c); - - if (c->iface && c->iface->unbind) { - c->iface->unbind(c, c->iface); - c->iface = NULL; - } - - return 0; -} - -static void dcesrv_prepare_context_auth(struct dcesrv_call_state *dce_call) -{ - struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx; - const struct dcesrv_endpoint *endpoint = dce_call->conn->endpoint; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(endpoint->ep_description); - struct dcesrv_connection_context *context = dce_call->context; - const struct dcesrv_interface *iface = context->iface; - - context->min_auth_level = DCERPC_AUTH_LEVEL_NONE; - - if (transport == NCALRPC) { - context->allow_connect = true; - return; - } - - /* - * allow overwrite per interface - * allow dcerpc auth level connect: - */ - context->allow_connect = lpcfg_allow_dcerpc_auth_level_connect(lp_ctx); - context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, - "allow dcerpc auth level connect", - iface->name, - context->allow_connect); -} - -NTSTATUS dcesrv_interface_bind_require_integrity(struct dcesrv_connection_context *context, - const struct dcesrv_interface *iface) -{ - /* - * For connection oriented DCERPC DCERPC_AUTH_LEVEL_PACKET (4) - * has the same behavior as DCERPC_AUTH_LEVEL_INTEGRITY (5). - */ - context->min_auth_level = DCERPC_AUTH_LEVEL_PACKET; - return NT_STATUS_OK; -} - -NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_connection_context *context, - const struct dcesrv_interface *iface) -{ - context->min_auth_level = DCERPC_AUTH_LEVEL_PRIVACY; - return NT_STATUS_OK; -} - -_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_connection_context *context, - const struct dcesrv_interface *iface) -{ - struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx; - const struct dcesrv_endpoint *endpoint = context->conn->endpoint; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(endpoint->ep_description); - - if (transport == NCALRPC) { - context->allow_connect = true; - return NT_STATUS_OK; - } - - /* - * allow overwrite per interface - * allow dcerpc auth level connect: - */ - context->allow_connect = false; - context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, - "allow dcerpc auth level connect", - iface->name, - context->allow_connect); - return NT_STATUS_OK; -} - -_PUBLIC_ NTSTATUS dcesrv_interface_bind_allow_connect(struct dcesrv_connection_context *context, - const struct dcesrv_interface *iface) -{ - struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx; - const struct dcesrv_endpoint *endpoint = context->conn->endpoint; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(endpoint->ep_description); - - if (transport == NCALRPC) { - context->allow_connect = true; - return NT_STATUS_OK; - } - - /* - * allow overwrite per interface - * allow dcerpc auth level connect: - */ - context->allow_connect = true; - context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL, - "allow dcerpc auth level connect", - iface->name, - context->allow_connect); - return NT_STATUS_OK; -} - -struct dcesrv_conn_auth_wait_context { - struct tevent_req *req; - bool done; - NTSTATUS status; -}; - -struct dcesrv_conn_auth_wait_state { - uint8_t dummy; -}; - -static struct tevent_req *dcesrv_conn_auth_wait_send(TALLOC_CTX *mem_ctx, - struct tevent_context *ev, - void *private_data) -{ - struct dcesrv_conn_auth_wait_context *auth_wait = - talloc_get_type_abort(private_data, - struct dcesrv_conn_auth_wait_context); - struct tevent_req *req = NULL; - struct dcesrv_conn_auth_wait_state *state = NULL; - - req = tevent_req_create(mem_ctx, &state, - struct dcesrv_conn_auth_wait_state); - if (req == NULL) { - return NULL; - } - auth_wait->req = req; - - tevent_req_defer_callback(req, ev); - - if (!auth_wait->done) { - return req; - } - - if (tevent_req_nterror(req, auth_wait->status)) { - return tevent_req_post(req, ev); - } - - tevent_req_done(req); - return tevent_req_post(req, ev); -} - -static NTSTATUS dcesrv_conn_auth_wait_recv(struct tevent_req *req) -{ - return tevent_req_simple_recv_ntstatus(req); -} - -static NTSTATUS dcesrv_conn_auth_wait_setup(struct dcesrv_connection *conn) -{ - struct dcesrv_conn_auth_wait_context *auth_wait = NULL; - - if (conn->wait_send != NULL) { - return NT_STATUS_INTERNAL_ERROR; - } - - auth_wait = talloc_zero(conn, struct dcesrv_conn_auth_wait_context); - if (auth_wait == NULL) { - return NT_STATUS_NO_MEMORY; - } - - conn->wait_private = auth_wait; - conn->wait_send = dcesrv_conn_auth_wait_send; - conn->wait_recv = dcesrv_conn_auth_wait_recv; - return NT_STATUS_OK; -} - -static void dcesrv_conn_auth_wait_finished(struct dcesrv_connection *conn, - NTSTATUS status) -{ - struct dcesrv_conn_auth_wait_context *auth_wait = - talloc_get_type_abort(conn->wait_private, - struct dcesrv_conn_auth_wait_context); - - auth_wait->done = true; - auth_wait->status = status; - - if (auth_wait->req == NULL) { - return; - } - - if (tevent_req_nterror(auth_wait->req, status)) { - return; - } - - tevent_req_done(auth_wait->req); -} - -static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call); - -static void dcesrv_bind_done(struct tevent_req *subreq); - -/* - handle a bind request -*/ -static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call) -{ - struct dcesrv_connection *conn = call->conn; - struct ncacn_packet *pkt = &call->ack_pkt; - NTSTATUS status; - uint32_t extra_flags = 0; - uint16_t max_req = 0; - uint16_t max_rep = 0; - struct dcerpc_binding *ep_2nd_description = NULL; - const char *endpoint = NULL; - struct dcesrv_auth *auth = call->auth_state; - struct dcerpc_ack_ctx *ack_ctx_list = NULL; - struct dcerpc_ack_ctx *ack_features = NULL; - struct tevent_req *subreq = NULL; - size_t i; - - status = dcerpc_verify_ncacn_packet_header(&call->pkt, - DCERPC_PKT_BIND, - call->pkt.u.bind.auth_info.length, - 0, /* required flags */ - DCERPC_PFC_FLAG_FIRST | - DCERPC_PFC_FLAG_LAST | - DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | - 0x08 | /* this is not defined, but should be ignored */ - DCERPC_PFC_FLAG_CONC_MPX | - DCERPC_PFC_FLAG_DID_NOT_EXECUTE | - DCERPC_PFC_FLAG_MAYBE | - DCERPC_PFC_FLAG_OBJECT_UUID); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_bind_nak(call, - DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED); - } - - /* max_recv_frag and max_xmit_frag result always in the same value! */ - max_req = MIN(call->pkt.u.bind.max_xmit_frag, - call->pkt.u.bind.max_recv_frag); - /* - * The values are between 2048 and 5840 tested against Windows 2012R2 - * via ncacn_ip_tcp on port 135. - */ - max_req = MAX(2048, max_req); - max_rep = MIN(max_req, call->conn->max_recv_frag); - /* They are truncated to an 8 byte boundary. */ - max_rep &= 0xFFF8; - - /* max_recv_frag and max_xmit_frag result always in the same value! */ - call->conn->max_recv_frag = max_rep; - call->conn->max_xmit_frag = max_rep; - - status = call->conn->dce_ctx->callbacks.assoc_group.find(call); - if (!NT_STATUS_IS_OK(status)) { - DBG_NOTICE("Failed to find assoc_group 0x%08x: %s\n", - call->pkt.u.bind.assoc_group_id, nt_errstr(status)); - return dcesrv_bind_nak(call, 0); - } - - if (call->pkt.u.bind.num_contexts < 1) { - return dcesrv_bind_nak(call, 0); - } - - ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx, - call->pkt.u.bind.num_contexts); - if (ack_ctx_list == NULL) { - return dcesrv_bind_nak(call, 0); - } - - /* - * Set some sane defaults (required by dcesrv_negotiate_contexts()/ - * dcesrv_check_or_create_context()) and do some protocol validation - * and set sane defaults. - */ - for (i = 0; i < call->pkt.u.bind.num_contexts; i++) { - const struct dcerpc_ctx_list *c = &call->pkt.u.bind.ctx_list[i]; - struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; - bool is_feature = false; - uint64_t features = 0; - - if (c->num_transfer_syntaxes == 0) { - return dcesrv_bind_nak(call, 0); - } - - a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; - a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; - - /* - * It's only treated as bind time feature request, if the first - * transfer_syntax matches, all others are ignored. - */ - is_feature = dcerpc_extract_bind_time_features(c->transfer_syntaxes[0], - &features); - if (!is_feature) { - continue; - } - - if (ack_features != NULL) { - /* - * Only one bind time feature context is allowed. - */ - return dcesrv_bind_nak(call, 0); - } - ack_features = a; - - a->result = DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK; - a->reason.negotiate = 0; - if (features & DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING) { - if (call->conn->max_auth_states != 0) { - a->reason.negotiate |= - DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING; - } - } - if (features & DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN) { - a->reason.negotiate |= - DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN; - } - - call->conn->assoc_group->bind_time_features = a->reason.negotiate; - } - - /* - * Try to negotiate one new presentation context. - * - * Deep in here we locate the iface (by uuid) that the client - * requested, from the list of interfaces on the - * call->conn->endpoint, and call iface->bind() on that iface. - * - * call->conn was set up at the accept() of the socket, and - * call->conn->endpoint has a list of interfaces restricted to - * this port or pipe. - */ - status = dcesrv_negotiate_contexts(call, &call->pkt.u.bind, ack_ctx_list); - if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) { - return dcesrv_bind_nak(call, 0); - } - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - /* - * At this point we still don't know which interface (eg - * netlogon, lsa, drsuapi) the caller requested in this bind! - * The most recently added context is available as the first - * element in the linked list at call->conn->contexts, that is - * call->conn->contexts->iface, but they may not have - * requested one at all! - */ - - if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) && - (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { - call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; - extra_flags |= DCERPC_PFC_FLAG_CONC_MPX; - } - - if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { - call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL; - } - - /* - * After finding the interface and setting up the NDR - * transport negotiation etc, handle any authentication that - * is being requested. - */ - if (!dcesrv_auth_bind(call)) { - - if (auth->auth_level == DCERPC_AUTH_LEVEL_NONE) { - /* - * With DCERPC_AUTH_LEVEL_NONE, we get the - * reject_reason in auth->auth_context_id. - */ - return dcesrv_bind_nak(call, auth->auth_context_id); - } - - /* - * This must a be a temporary failure e.g. talloc or invalid - * configuration, e.g. no machine account. - */ - return dcesrv_bind_nak(call, - DCERPC_BIND_NAK_REASON_TEMPORARY_CONGESTION); - } - - /* setup a bind_ack */ - dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); - pkt->auth_length = 0; - pkt->call_id = call->pkt.call_id; - pkt->ptype = DCERPC_PKT_BIND_ACK; - pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags; - pkt->u.bind_ack.max_xmit_frag = call->conn->max_xmit_frag; - pkt->u.bind_ack.max_recv_frag = call->conn->max_recv_frag; - pkt->u.bind_ack.assoc_group_id = call->conn->assoc_group->id; - - ep_2nd_description = call->conn->endpoint->ep_2nd_description; - if (ep_2nd_description == NULL) { - ep_2nd_description = call->conn->endpoint->ep_description; - } - - endpoint = dcerpc_binding_get_string_option( - ep_2nd_description, - "endpoint"); - if (endpoint == NULL) { - endpoint = ""; - } - - pkt->u.bind_ack.secondary_address = endpoint; - pkt->u.bind_ack.num_results = call->pkt.u.bind.num_contexts; - pkt->u.bind_ack.ctx_list = ack_ctx_list; - pkt->u.bind_ack.auth_info = data_blob_null; - - status = dcesrv_auth_prepare_bind_ack(call, pkt); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_bind_nak(call, 0); - } - - if (auth->auth_finished) { - return dcesrv_auth_reply(call); - } - - subreq = gensec_update_send(call, call->event_ctx, - auth->gensec_security, - call->in_auth_info.credentials); - if (subreq == NULL) { - return NT_STATUS_NO_MEMORY; - } - tevent_req_set_callback(subreq, dcesrv_bind_done, call); - - return dcesrv_conn_auth_wait_setup(conn); -} - -static void dcesrv_bind_done(struct tevent_req *subreq) -{ - struct dcesrv_call_state *call = - tevent_req_callback_data(subreq, - struct dcesrv_call_state); - struct dcesrv_connection *conn = call->conn; - NTSTATUS status; - - status = gensec_update_recv(subreq, call, - &call->out_auth_info->credentials); - TALLOC_FREE(subreq); - - status = dcesrv_auth_complete(call, status); - if (!NT_STATUS_IS_OK(status)) { - status = dcesrv_bind_nak(call, 0); - dcesrv_conn_auth_wait_finished(conn, status); - return; - } - - status = dcesrv_auth_reply(call); - dcesrv_conn_auth_wait_finished(conn, status); - return; -} - -static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call) -{ - struct ncacn_packet *pkt = &call->ack_pkt; - struct data_blob_list_item *rep = NULL; - NTSTATUS status; - - rep = talloc_zero(call, struct data_blob_list_item); - if (!rep) { - return NT_STATUS_NO_MEMORY; - } - - status = dcerpc_ncacn_push_auth(&rep->blob, - call, - pkt, - call->out_auth_info); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - dcerpc_set_frag_length(&rep->blob, rep->blob.length); - - DLIST_ADD_END(call->replies, rep); - dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST); - - if (call->conn->call_list && call->conn->call_list->replies) { - if (call->conn->transport.report_output_data) { - call->conn->transport.report_output_data(call->conn); - } - } - - return NT_STATUS_OK; -} - - -static void dcesrv_auth3_done(struct tevent_req *subreq); - -/* - handle a auth3 request -*/ -static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call) -{ - struct dcesrv_connection *conn = call->conn; - struct dcesrv_auth *auth = call->auth_state; - struct tevent_req *subreq = NULL; - NTSTATUS status; - - if (!auth->auth_started) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - if (auth->auth_finished) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - status = dcerpc_verify_ncacn_packet_header(&call->pkt, - DCERPC_PKT_AUTH3, - call->pkt.u.auth3.auth_info.length, - 0, /* required flags */ - DCERPC_PFC_FLAG_FIRST | - DCERPC_PFC_FLAG_LAST | - DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | - 0x08 | /* this is not defined, but should be ignored */ - DCERPC_PFC_FLAG_CONC_MPX | - DCERPC_PFC_FLAG_DID_NOT_EXECUTE | - DCERPC_PFC_FLAG_MAYBE | - DCERPC_PFC_FLAG_OBJECT_UUID); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - /* handle the auth3 in the auth code */ - if (!dcesrv_auth_prepare_auth3(call)) { - /* - * we don't send a reply to a auth3 request, - * except by a fault. - * - * In anycase we mark the connection as - * invalid. - */ - auth->auth_invalid = true; - if (call->fault_code != 0) { - return dcesrv_fault_disconnect(call, call->fault_code); - } - TALLOC_FREE(call); - return NT_STATUS_OK; - } - - subreq = gensec_update_send(call, call->event_ctx, - auth->gensec_security, - call->in_auth_info.credentials); - if (subreq == NULL) { - return NT_STATUS_NO_MEMORY; - } - tevent_req_set_callback(subreq, dcesrv_auth3_done, call); - - return dcesrv_conn_auth_wait_setup(conn); -} - -static void dcesrv_auth3_done(struct tevent_req *subreq) -{ - struct dcesrv_call_state *call = - tevent_req_callback_data(subreq, - struct dcesrv_call_state); - struct dcesrv_connection *conn = call->conn; - struct dcesrv_auth *auth = call->auth_state; - NTSTATUS status; - - status = gensec_update_recv(subreq, call, - &call->out_auth_info->credentials); - TALLOC_FREE(subreq); - - status = dcesrv_auth_complete(call, status); - if (!NT_STATUS_IS_OK(status)) { - /* - * we don't send a reply to a auth3 request, - * except by a fault. - * - * In anycase we mark the connection as - * invalid. - */ - auth->auth_invalid = true; - if (call->fault_code != 0) { - status = dcesrv_fault_disconnect(call, call->fault_code); - dcesrv_conn_auth_wait_finished(conn, status); - return; - } - TALLOC_FREE(call); - dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK); - return; - } - - /* - * we don't send a reply to a auth3 request. - */ - TALLOC_FREE(call); - dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK); - return; -} - - -static NTSTATUS dcesrv_check_or_create_context(struct dcesrv_call_state *call, - const struct dcerpc_bind *b, - const struct dcerpc_ctx_list *ctx, - struct dcerpc_ack_ctx *ack, - bool validate_only, - const struct ndr_syntax_id *supported_transfer) -{ - uint32_t if_version; - struct dcesrv_connection_context *context; - const struct dcesrv_interface *iface; - struct GUID uuid; - NTSTATUS status; - const struct ndr_syntax_id *selected_transfer = NULL; - size_t i; - bool ok; - - if (b == NULL) { - return NT_STATUS_INTERNAL_ERROR; - } - if (ctx == NULL) { - return NT_STATUS_INTERNAL_ERROR; - } - if (ctx->num_transfer_syntaxes < 1) { - return NT_STATUS_INTERNAL_ERROR; - } - if (ack == NULL) { - return NT_STATUS_INTERNAL_ERROR; - } - if (supported_transfer == NULL) { - return NT_STATUS_INTERNAL_ERROR; - } - - switch (ack->result) { - case DCERPC_BIND_ACK_RESULT_ACCEPTANCE: - case DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK: - /* - * We is already completed. - */ - return NT_STATUS_OK; - default: - break; - } - - ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; - ack->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; - - if_version = ctx->abstract_syntax.if_version; - uuid = ctx->abstract_syntax.uuid; - - iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version); - if (iface == NULL) { - char *uuid_str = GUID_string(call, &uuid); - DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version)); - talloc_free(uuid_str); - /* - * We report this only via ack->result - */ - return NT_STATUS_OK; - } - - ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; - ack->reason.value = DCERPC_BIND_ACK_REASON_TRANSFER_SYNTAXES_NOT_SUPPORTED; - - if (validate_only) { - /* - * We report this only via ack->result - */ - return NT_STATUS_OK; - } - - for (i = 0; i < ctx->num_transfer_syntaxes; i++) { - /* - * we only do NDR encoded dcerpc for now. - */ - ok = ndr_syntax_id_equal(&ctx->transfer_syntaxes[i], - supported_transfer); - if (ok) { - selected_transfer = supported_transfer; - break; - } - } - - context = dcesrv_find_context(call->conn, ctx->context_id); - if (context != NULL) { - ok = ndr_syntax_id_equal(&context->iface->syntax_id, - &ctx->abstract_syntax); - if (!ok) { - return NT_STATUS_RPC_PROTOCOL_ERROR; - } - - if (selected_transfer != NULL) { - ok = ndr_syntax_id_equal(&context->transfer_syntax, - selected_transfer); - if (!ok) { - return NT_STATUS_RPC_PROTOCOL_ERROR; - } - - ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE; - ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED; - ack->syntax = context->transfer_syntax; - } - - /* - * We report this only via ack->result - */ - return NT_STATUS_OK; - } - - if (selected_transfer == NULL) { - /* - * We report this only via ack->result - */ - return NT_STATUS_OK; - } - - ack->result = DCERPC_BIND_ACK_RESULT_USER_REJECTION; - ack->reason.value = DCERPC_BIND_ACK_REASON_LOCAL_LIMIT_EXCEEDED; - - /* add this context to the list of available context_ids */ - context = talloc_zero(call->conn, struct dcesrv_connection_context); - if (context == NULL) { - return NT_STATUS_NO_MEMORY; - } - context->conn = call->conn; - context->context_id = ctx->context_id; - context->iface = iface; - context->transfer_syntax = *selected_transfer; - DLIST_ADD(call->conn->contexts, context); - call->context = context; - talloc_set_destructor(context, dcesrv_connection_context_destructor); - - dcesrv_prepare_context_auth(call); - - /* - * Multiplex is supported by default - */ - call->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; - - status = iface->bind(context, iface); - call->context = NULL; - if (!NT_STATUS_IS_OK(status)) { - /* we don't want to trigger the iface->unbind() hook */ - context->iface = NULL; - talloc_free(context); - /* - * We report this only via ack->result - */ - return NT_STATUS_OK; - } - - ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE; - ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED; - ack->syntax = context->transfer_syntax; - return NT_STATUS_OK; -} - -static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call, - const struct dcerpc_bind *b, - struct dcerpc_ack_ctx *ack_ctx_list) -{ - NTSTATUS status; - size_t i; - bool validate_only = false; - bool preferred_ndr32; - - /* - * Try to negotiate one new presentation context, - * using our preferred transfer syntax. - */ - for (i = 0; i < b->num_contexts; i++) { - const struct dcerpc_ctx_list *c = &b->ctx_list[i]; - struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; - - status = dcesrv_check_or_create_context(call, b, c, a, - validate_only, - call->conn->preferred_transfer); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) { - /* - * We managed to negotiate one context. - * - * => we're done. - */ - validate_only = true; - } - } - - preferred_ndr32 = ndr_syntax_id_equal(&ndr_transfer_syntax_ndr, - call->conn->preferred_transfer); - if (preferred_ndr32) { - /* - * We're done. - */ - return NT_STATUS_OK; - } - - /* - * Try to negotiate one new presentation context, - * using NDR 32 as fallback. - */ - for (i = 0; i < b->num_contexts; i++) { - const struct dcerpc_ctx_list *c = &b->ctx_list[i]; - struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; - - status = dcesrv_check_or_create_context(call, b, c, a, - validate_only, - &ndr_transfer_syntax_ndr); - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) { - /* - * We managed to negotiate one context. - * - * => we're done. - */ - validate_only = true; - } - } - - return NT_STATUS_OK; -} - -static void dcesrv_alter_done(struct tevent_req *subreq); - -/* - handle a alter context request -*/ -static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call) -{ - struct dcesrv_connection *conn = call->conn; - NTSTATUS status; - bool auth_ok = false; - struct ncacn_packet *pkt = &call->ack_pkt; - uint32_t extra_flags = 0; - struct dcesrv_auth *auth = call->auth_state; - struct dcerpc_ack_ctx *ack_ctx_list = NULL; - struct tevent_req *subreq = NULL; - size_t i; - - if (!call->conn->allow_alter) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - status = dcerpc_verify_ncacn_packet_header(&call->pkt, - DCERPC_PKT_ALTER, - call->pkt.u.alter.auth_info.length, - 0, /* required flags */ - DCERPC_PFC_FLAG_FIRST | - DCERPC_PFC_FLAG_LAST | - DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | - 0x08 | /* this is not defined, but should be ignored */ - DCERPC_PFC_FLAG_CONC_MPX | - DCERPC_PFC_FLAG_DID_NOT_EXECUTE | - DCERPC_PFC_FLAG_MAYBE | - DCERPC_PFC_FLAG_OBJECT_UUID); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - auth_ok = dcesrv_auth_alter(call); - if (!auth_ok) { - if (call->fault_code != 0) { - return dcesrv_fault_disconnect(call, call->fault_code); - } - } - - if (call->pkt.u.alter.num_contexts < 1) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx, - call->pkt.u.alter.num_contexts); - if (ack_ctx_list == NULL) { - return NT_STATUS_NO_MEMORY; - } - - /* - * Set some sane defaults (required by dcesrv_negotiate_contexts()/ - * dcesrv_check_or_create_context()) and do some protocol validation - * and set sane defaults. - */ - for (i = 0; i < call->pkt.u.alter.num_contexts; i++) { - const struct dcerpc_ctx_list *c = &call->pkt.u.alter.ctx_list[i]; - struct dcerpc_ack_ctx *a = &ack_ctx_list[i]; - - if (c->num_transfer_syntaxes == 0) { - return dcesrv_fault_disconnect(call, - DCERPC_NCA_S_PROTO_ERROR); - } - - a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION; - a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED; - } - - /* - * Try to negotiate one new presentation context. - */ - status = dcesrv_negotiate_contexts(call, &call->pkt.u.alter, ack_ctx_list); - if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - if (!NT_STATUS_IS_OK(status)) { - return status; - } - - if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) && - (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { - call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED; - extra_flags |= DCERPC_PFC_FLAG_CONC_MPX; - } - - if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { - call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL; - } - - /* handle any authentication that is being requested */ - if (!auth_ok) { - if (call->in_auth_info.auth_type != auth->auth_type) { - return dcesrv_fault_disconnect(call, - DCERPC_FAULT_SEC_PKG_ERROR); - } - return dcesrv_fault_disconnect(call, DCERPC_FAULT_ACCESS_DENIED); - } - - dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx)); - pkt->auth_length = 0; - pkt->call_id = call->pkt.call_id; - pkt->ptype = DCERPC_PKT_ALTER_RESP; - pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags; - pkt->u.alter_resp.max_xmit_frag = call->conn->max_xmit_frag; - pkt->u.alter_resp.max_recv_frag = call->conn->max_recv_frag; - pkt->u.alter_resp.assoc_group_id = call->conn->assoc_group->id; - pkt->u.alter_resp.secondary_address = ""; - pkt->u.alter_resp.num_results = call->pkt.u.alter.num_contexts; - pkt->u.alter_resp.ctx_list = ack_ctx_list; - pkt->u.alter_resp.auth_info = data_blob_null; - - status = dcesrv_auth_prepare_alter_ack(call, pkt); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR); - } - - if (auth->auth_finished) { - return dcesrv_auth_reply(call); - } - - subreq = gensec_update_send(call, call->event_ctx, - auth->gensec_security, - call->in_auth_info.credentials); - if (subreq == NULL) { - return NT_STATUS_NO_MEMORY; - } - tevent_req_set_callback(subreq, dcesrv_alter_done, call); - - return dcesrv_conn_auth_wait_setup(conn); -} - -static void dcesrv_alter_done(struct tevent_req *subreq) -{ - struct dcesrv_call_state *call = - tevent_req_callback_data(subreq, - struct dcesrv_call_state); - struct dcesrv_connection *conn = call->conn; - NTSTATUS status; - - status = gensec_update_recv(subreq, call, - &call->out_auth_info->credentials); - TALLOC_FREE(subreq); - - status = dcesrv_auth_complete(call, status); - if (!NT_STATUS_IS_OK(status)) { - status = dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR); - dcesrv_conn_auth_wait_finished(conn, status); - return; - } - - status = dcesrv_auth_reply(call); - dcesrv_conn_auth_wait_finished(conn, status); - return; -} - -/* - possibly save the call for inspection with ndrdump - */ -static void dcesrv_save_call(struct dcesrv_call_state *call, const char *why) -{ -#ifdef DEVELOPER - char *fname; - const char *dump_dir; - dump_dir = lpcfg_parm_string(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv", "stubs directory"); - if (!dump_dir) { - return; - } - fname = talloc_asprintf(call, "%s/RPC-%s-%u-%s.dat", - dump_dir, - call->context->iface->name, - call->pkt.u.request.opnum, - why); - if (file_save(fname, call->pkt.u.request.stub_and_verifier.data, call->pkt.u.request.stub_and_verifier.length)) { - DEBUG(0,("RPC SAVED %s\n", fname)); - } - talloc_free(fname); -#endif -} - -static NTSTATUS dcesrv_check_verification_trailer(struct dcesrv_call_state *call) -{ - TALLOC_CTX *frame = talloc_stackframe(); - const uint32_t bitmask1 = call->conn->client_hdr_signing ? - DCERPC_SEC_VT_CLIENT_SUPPORTS_HEADER_SIGNING : 0; - const struct dcerpc_sec_vt_pcontext pcontext = { - .abstract_syntax = call->context->iface->syntax_id, - .transfer_syntax = call->context->transfer_syntax, - }; - const struct dcerpc_sec_vt_header2 header2 = - dcerpc_sec_vt_header2_from_ncacn_packet(&call->pkt); - enum ndr_err_code ndr_err; - struct dcerpc_sec_verification_trailer *vt = NULL; - NTSTATUS status = NT_STATUS_OK; - bool ok; - - SMB_ASSERT(call->pkt.ptype == DCERPC_PKT_REQUEST); - - ndr_err = ndr_pop_dcerpc_sec_verification_trailer(call->ndr_pull, - frame, &vt); - if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { - status = ndr_map_error2ntstatus(ndr_err); - goto done; - } - - ok = dcerpc_sec_verification_trailer_check(vt, &bitmask1, - &pcontext, &header2); - if (!ok) { - status = NT_STATUS_ACCESS_DENIED; - goto done; - } -done: - TALLOC_FREE(frame); - return status; -} - -/* - handle a dcerpc request packet -*/ -static NTSTATUS dcesrv_request(struct dcesrv_call_state *call) -{ - const struct dcesrv_endpoint *endpoint = call->conn->endpoint; - struct dcesrv_auth *auth = call->auth_state; - enum dcerpc_transport_t transport = - dcerpc_binding_get_transport(endpoint->ep_description); - struct ndr_pull *pull; - NTSTATUS status; - - if (!auth->auth_finished) { - return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - } - - /* if authenticated, and the mech we use can't do async replies, don't use them... */ - if (auth->gensec_security != NULL && - !gensec_have_feature(auth->gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) { - call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MAY_ASYNC; - } - - if (call->context == NULL) { - return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF, - DCERPC_PFC_FLAG_DID_NOT_EXECUTE); - } - - switch (auth->auth_level) { - case DCERPC_AUTH_LEVEL_NONE: - case DCERPC_AUTH_LEVEL_PACKET: - case DCERPC_AUTH_LEVEL_INTEGRITY: - case DCERPC_AUTH_LEVEL_PRIVACY: - break; - default: - if (!call->context->allow_connect) { - char *addr; - - addr = tsocket_address_string(call->conn->remote_address, - call); - - DEBUG(2, ("%s: restrict auth_level_connect access " - "to [%s] with auth[type=0x%x,level=0x%x] " - "on [%s] from [%s]\n", - __func__, call->context->iface->name, - auth->auth_type, - auth->auth_level, - derpc_transport_string_by_transport(transport), - addr)); - return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); - } - break; - } - - if (auth->auth_level < call->context->min_auth_level) { - char *addr; - - addr = tsocket_address_string(call->conn->remote_address, call); - - DEBUG(2, ("%s: restrict access by min_auth_level[0x%x] " - "to [%s] with auth[type=0x%x,level=0x%x] " - "on [%s] from [%s]\n", - __func__, - call->context->min_auth_level, - call->context->iface->name, - auth->auth_type, - auth->auth_level, - derpc_transport_string_by_transport(transport), - addr)); - return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); - } - - pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call); - NT_STATUS_HAVE_NO_MEMORY(pull); - - pull->flags |= LIBNDR_FLAG_REF_ALLOC; - - call->ndr_pull = pull; - - if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) { - pull->flags |= LIBNDR_FLAG_BIGENDIAN; - } - - status = dcesrv_check_verification_trailer(call); - if (!NT_STATUS_IS_OK(status)) { - uint32_t faultcode = DCERPC_FAULT_OTHER; - if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) { - faultcode = DCERPC_FAULT_ACCESS_DENIED; - } - DEBUG(10, ("dcesrv_check_verification_trailer failed: %s\n", - nt_errstr(status))); - return dcesrv_fault(call, faultcode); - } - - /* unravel the NDR for the packet */ - status = call->context->iface->ndr_pull(call, call, pull, &call->r); - if (!NT_STATUS_IS_OK(status)) { - uint8_t extra_flags = 0; - if (call->fault_code == DCERPC_FAULT_OP_RNG_ERROR) { - /* we got an unknown call */ - DEBUG(3,(__location__ ": Unknown RPC call %u on %s\n", - call->pkt.u.request.opnum, - call->context->iface->name)); - dcesrv_save_call(call, "unknown"); - extra_flags |= DCERPC_PFC_FLAG_DID_NOT_EXECUTE; - } else { - dcesrv_save_call(call, "pullfail"); - } - return dcesrv_fault_with_flags(call, call->fault_code, extra_flags); - } - - if (pull->offset != pull->data_size) { - dcesrv_save_call(call, "extrabytes"); - DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n", - pull->data_size - pull->offset)); - } - - /* call the dispatch function */ - status = call->context->iface->dispatch(call, call, call->r); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(5,("dcerpc fault in call %s:%02x - %s\n", - call->context->iface->name, - call->pkt.u.request.opnum, - dcerpc_errstr(pull, call->fault_code))); - return dcesrv_fault(call, call->fault_code); - } - - /* add the call to the pending list */ - dcesrv_call_set_list(call, DCESRV_LIST_PENDING_CALL_LIST); - - if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) { - return NT_STATUS_OK; - } - - return dcesrv_reply(call); -} - - -/* - remove the call from the right list when freed - */ -static int dcesrv_call_dequeue(struct dcesrv_call_state *call) -{ - dcesrv_call_set_list(call, DCESRV_LIST_NONE); - return 0; -} - -_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn) -{ - return conn->local_address; -} - -_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn) -{ - return conn->remote_address; -} - -/* - process some input to a dcerpc endpoint server. -*/ -static NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn, - struct ncacn_packet *pkt, - DATA_BLOB blob) -{ - NTSTATUS status; - struct dcesrv_call_state *call; - struct dcesrv_call_state *existing = NULL; - size_t num_auth_ctx = 0; - enum dcerpc_AuthType auth_type = 0; - enum dcerpc_AuthLevel auth_level = 0; - uint32_t auth_context_id = 0; - - call = talloc_zero(dce_conn, struct dcesrv_call_state); - if (!call) { - data_blob_free(&blob); - talloc_free(pkt); - return NT_STATUS_NO_MEMORY; - } - call->conn = dce_conn; - call->event_ctx = dce_conn->event_ctx; - call->state_flags = call->conn->state_flags; - call->time = timeval_current(); - call->list = DCESRV_LIST_NONE; - - talloc_steal(call, pkt); - talloc_steal(call, blob.data); - call->pkt = *pkt; - - if (dce_conn->max_auth_states == 0) { - call->auth_state = dce_conn->default_auth_state; - } else if (call->pkt.auth_length == 0) { - if (call->pkt.ptype == DCERPC_PKT_REQUEST && - dce_conn->default_auth_level_connect != NULL) - { - call->auth_state = dce_conn->default_auth_level_connect; - } else { - call->auth_state = dce_conn->default_auth_state; - } - } - - if (call->auth_state == NULL) { - struct dcesrv_auth *a = NULL; - - auth_type = dcerpc_get_auth_type(&blob); - auth_level = dcerpc_get_auth_level(&blob); - auth_context_id = dcerpc_get_auth_context_id(&blob); - - if (call->pkt.ptype == DCERPC_PKT_REQUEST) { - dce_conn->default_auth_level_connect = NULL; - if (auth_level == DCERPC_AUTH_LEVEL_CONNECT) { - dce_conn->got_explicit_auth_level_connect = true; - } - } - - for (a = dce_conn->auth_states; a != NULL; a = a->next) { - num_auth_ctx++; - - if (a->auth_type != auth_type) { - continue; - } - if (a->auth_finished && a->auth_level != auth_level) { - continue; - } - if (a->auth_context_id != auth_context_id) { - continue; - } - - DLIST_PROMOTE(dce_conn->auth_states, a); - call->auth_state = a; - break; - } - } - - if (call->auth_state == NULL) { - struct dcesrv_auth *a = NULL; - - if (num_auth_ctx >= dce_conn->max_auth_states) { - return dcesrv_fault_disconnect(call, - DCERPC_NCA_S_PROTO_ERROR); - } - - a = dcesrv_auth_create(dce_conn); - if (a == NULL) { - talloc_free(call); - return NT_STATUS_NO_MEMORY; - } - DLIST_ADD(dce_conn->auth_states, a); - if (call->pkt.ptype == DCERPC_PKT_REQUEST) { - /* - * This can never be valid. - */ - a->auth_invalid = true; - } - call->auth_state = a; - } - - talloc_set_destructor(call, dcesrv_call_dequeue); - - if (call->conn->allow_bind) { - /* - * Only one bind is possible per connection - */ - call->conn->allow_bind = false; - return dcesrv_bind(call); - } - - /* we have to check the signing here, before combining the - pdus */ - if (call->pkt.ptype == DCERPC_PKT_REQUEST) { - dcesrv_default_auth_state_prepare_request(call); - - if (call->auth_state->auth_started && - !call->auth_state->auth_finished) { - return dcesrv_fault_disconnect(call, - DCERPC_NCA_S_PROTO_ERROR); - } - - status = dcerpc_verify_ncacn_packet_header(&call->pkt, - DCERPC_PKT_REQUEST, - call->pkt.u.request.stub_and_verifier.length, - 0, /* required_flags */ - DCERPC_PFC_FLAG_FIRST | - DCERPC_PFC_FLAG_LAST | - DCERPC_PFC_FLAG_PENDING_CANCEL | - 0x08 | /* this is not defined, but should be ignored */ - DCERPC_PFC_FLAG_CONC_MPX | - DCERPC_PFC_FLAG_DID_NOT_EXECUTE | - DCERPC_PFC_FLAG_MAYBE | - DCERPC_PFC_FLAG_OBJECT_UUID); - if (!NT_STATUS_IS_OK(status)) { - return dcesrv_fault_disconnect(call, - DCERPC_NCA_S_PROTO_ERROR); - } - - if (call->pkt.frag_length > DCERPC_FRAG_MAX_SIZE) { - /* - * We don't use dcesrv_fault_disconnect() - * here, because we don't want to set - * DCERPC_PFC_FLAG_DID_NOT_EXECUTE - * - * Note that we don't check against the negotiated - * max_recv_frag, but a hard coded value. - */ - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - frag_length too large"); - return dcesrv_fault(call, - DCERPC_NCA_S_PROTO_ERROR); - } - - if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST) { - if (dce_conn->pending_call_list != NULL) { - /* - * concurrent requests are only allowed - * if DCERPC_PFC_FLAG_CONC_MPX was negotiated. - */ - if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - " - "existing pending call without CONN_MPX"); - return dcesrv_fault(call, - DCERPC_NCA_S_PROTO_ERROR); - } - } - /* only one request is possible in the fragmented list */ - if (dce_conn->incoming_fragmented_call_list != NULL) { - if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) { - /* - * Without DCERPC_PFC_FLAG_CONC_MPX - * we need to return the FAULT on the - * already existing call. - * - * This is important to get the - * call_id and context_id right. - */ - TALLOC_FREE(call); - call = dce_conn->incoming_fragmented_call_list; - } - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - " - "existing fragmented call"); - return dcesrv_fault(call, - DCERPC_NCA_S_PROTO_ERROR); - } - if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_PENDING_CANCEL) { - return dcesrv_fault_disconnect(call, - DCERPC_FAULT_NO_CALL_ACTIVE); - } - call->context = dcesrv_find_context(call->conn, - call->pkt.u.request.context_id); - if (call->context == NULL) { - return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF, - DCERPC_PFC_FLAG_DID_NOT_EXECUTE); - } - } else { - const struct dcerpc_request *nr = &call->pkt.u.request; - const struct dcerpc_request *er = NULL; - int cmp; - - existing = dcesrv_find_fragmented_call(dce_conn, - call->pkt.call_id); - if (existing == NULL) { - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - " - "no existing fragmented call"); - return dcesrv_fault(call, - DCERPC_NCA_S_PROTO_ERROR); - } - er = &existing->pkt.u.request; - - if (call->pkt.ptype != existing->pkt.ptype) { - /* trying to play silly buggers are we? */ - return dcesrv_fault_disconnect(existing, - DCERPC_NCA_S_PROTO_ERROR); - } - cmp = memcmp(call->pkt.drep, existing->pkt.drep, - sizeof(pkt->drep)); - if (cmp != 0) { - return dcesrv_fault_disconnect(existing, - DCERPC_NCA_S_PROTO_ERROR); - } - if (nr->context_id != er->context_id) { - return dcesrv_fault_disconnect(existing, - DCERPC_NCA_S_PROTO_ERROR); - } - if (nr->opnum != er->opnum) { - return dcesrv_fault_disconnect(existing, - DCERPC_NCA_S_PROTO_ERROR); - } - } - } - - if (call->pkt.ptype == DCERPC_PKT_REQUEST) { - bool ok; - uint8_t payload_offset = DCERPC_REQUEST_LENGTH; - - if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) { - payload_offset += 16; - } - - ok = dcesrv_auth_pkt_pull(call, &blob, - 0, /* required_flags */ - DCERPC_PFC_FLAG_FIRST | - DCERPC_PFC_FLAG_LAST | - DCERPC_PFC_FLAG_PENDING_CANCEL | - 0x08 | /* this is not defined, but should be ignored */ - DCERPC_PFC_FLAG_CONC_MPX | - DCERPC_PFC_FLAG_DID_NOT_EXECUTE | - DCERPC_PFC_FLAG_MAYBE | - DCERPC_PFC_FLAG_OBJECT_UUID, - payload_offset, - &call->pkt.u.request.stub_and_verifier); - if (!ok) { - /* - * We don't use dcesrv_fault_disconnect() - * here, because we don't want to set - * DCERPC_PFC_FLAG_DID_NOT_EXECUTE - */ - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - failed"); - if (call->fault_code == 0) { - call->fault_code = DCERPC_FAULT_ACCESS_DENIED; - } - return dcesrv_fault(call, call->fault_code); - } - } - - /* see if this is a continued packet */ - if (existing != NULL) { - struct dcerpc_request *er = &existing->pkt.u.request; - const struct dcerpc_request *nr = &call->pkt.u.request; - size_t available; - size_t alloc_size; - size_t alloc_hint; - - /* - * Up to 4 MByte are allowed by all fragments - */ - available = dce_conn->max_total_request_size; - if (er->stub_and_verifier.length > available) { - dcesrv_call_disconnect_after(existing, - "dcesrv_auth_request - existing payload too large"); - return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); - } - available -= er->stub_and_verifier.length; - if (nr->alloc_hint > available) { - dcesrv_call_disconnect_after(existing, - "dcesrv_auth_request - alloc hint too large"); - return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); - } - if (nr->stub_and_verifier.length > available) { - dcesrv_call_disconnect_after(existing, - "dcesrv_auth_request - new payload too large"); - return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED); - } - alloc_hint = er->stub_and_verifier.length + nr->alloc_hint; - /* allocate at least 1 byte */ - alloc_hint = MAX(alloc_hint, 1); - alloc_size = er->stub_and_verifier.length + - nr->stub_and_verifier.length; - alloc_size = MAX(alloc_size, alloc_hint); - - er->stub_and_verifier.data = - talloc_realloc(existing, - er->stub_and_verifier.data, - uint8_t, alloc_size); - if (er->stub_and_verifier.data == NULL) { - TALLOC_FREE(call); - return dcesrv_fault_with_flags(existing, - DCERPC_FAULT_OUT_OF_RESOURCES, - DCERPC_PFC_FLAG_DID_NOT_EXECUTE); - } - memcpy(er->stub_and_verifier.data + - er->stub_and_verifier.length, - nr->stub_and_verifier.data, - nr->stub_and_verifier.length); - er->stub_and_verifier.length += nr->stub_and_verifier.length; - - existing->pkt.pfc_flags |= (call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST); - - TALLOC_FREE(call); - call = existing; - } - - /* this may not be the last pdu in the chain - if its isn't then - just put it on the incoming_fragmented_call_list and wait for the rest */ - if (call->pkt.ptype == DCERPC_PKT_REQUEST && - !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) { - /* - * Up to 4 MByte are allowed by all fragments - */ - if (call->pkt.u.request.alloc_hint > dce_conn->max_total_request_size) { - dcesrv_call_disconnect_after(call, - "dcesrv_auth_request - initial alloc hint too large"); - return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED); - } - dcesrv_call_set_list(call, DCESRV_LIST_FRAGMENTED_CALL_LIST); - return NT_STATUS_OK; - } - - /* This removes any fragments we may have had stashed away */ - dcesrv_call_set_list(call, DCESRV_LIST_NONE); - - switch (call->pkt.ptype) { - case DCERPC_PKT_BIND: - status = dcesrv_bind_nak(call, - DCERPC_BIND_NAK_REASON_NOT_SPECIFIED); - break; - case DCERPC_PKT_AUTH3: - status = dcesrv_auth3(call); - break; - case DCERPC_PKT_ALTER: - status = dcesrv_alter(call); - break; - case DCERPC_PKT_REQUEST: - status = dcesrv_request(call); - break; - case DCERPC_PKT_CO_CANCEL: - case DCERPC_PKT_ORPHANED: - /* - * Window just ignores CO_CANCEL and ORPHANED, - * so we do... - */ - status = NT_STATUS_OK; - TALLOC_FREE(call); - break; - case DCERPC_PKT_BIND_ACK: - case DCERPC_PKT_BIND_NAK: - case DCERPC_PKT_ALTER_RESP: - case DCERPC_PKT_RESPONSE: - case DCERPC_PKT_FAULT: - case DCERPC_PKT_SHUTDOWN: - default: - status = dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR); - break; - } - - /* if we are going to be sending a reply then add - it to the list of pending calls. We add it to the end to keep the call - list in the order we will answer */ - if (!NT_STATUS_IS_OK(status)) { - talloc_free(call); - } - - return status; -} - -_PUBLIC_ NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx, - struct loadparm_context *lp_ctx, - const char **endpoint_servers, - struct dcesrv_context_callbacks *cb, - struct dcesrv_context **_dce_ctx) -{ - NTSTATUS status; - struct dcesrv_context *dce_ctx; - int i; - - if (!endpoint_servers) { - DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n")); - return NT_STATUS_INTERNAL_ERROR; - } - - dce_ctx = talloc_zero(mem_ctx, struct dcesrv_context); - NT_STATUS_HAVE_NO_MEMORY(dce_ctx); - - if (uid_wrapper_enabled()) { - setenv("UID_WRAPPER_MYUID", "1", 1); - } - dce_ctx->initial_euid = geteuid(); - if (uid_wrapper_enabled()) { - unsetenv("UID_WRAPPER_MYUID"); - } - - dce_ctx->endpoint_list = NULL; - dce_ctx->lp_ctx = lp_ctx; - dce_ctx->assoc_groups_idr = idr_init(dce_ctx); - NT_STATUS_HAVE_NO_MEMORY(dce_ctx->assoc_groups_idr); - dce_ctx->broken_connections = NULL; - if (cb != NULL) { - dce_ctx->callbacks = *cb; - } - - for (i=0;endpoint_servers[i];i++) { - const struct dcesrv_endpoint_server *ep_server; - - ep_server = dcesrv_ep_server_byname(endpoint_servers[i]); - if (!ep_server) { - DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i])); - return NT_STATUS_INTERNAL_ERROR; - } - - status = ep_server->init_server(dce_ctx, ep_server); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i], - nt_errstr(status))); - return status; - } - } - - *_dce_ctx = dce_ctx; - return NT_STATUS_OK; + return talloc_reference(conn, assoc_group); } -/* the list of currently registered DCERPC endpoint servers. - */ -static struct ep_server { - struct dcesrv_endpoint_server *ep_server; -} *ep_servers = NULL; -static int num_ep_servers; +static int dcesrv_assoc_group_destructor(struct dcesrv_assoc_group *assoc_group) +{ + int ret; + ret = idr_remove(assoc_group->dce_ctx->assoc_groups_idr, assoc_group->id); + if (ret != 0) { + DEBUG(0,(__location__ ": Failed to remove assoc_group 0x%08x\n", + assoc_group->id)); + } + return 0; +} /* - register a DCERPC endpoint server. - - The 'name' can be later used by other backends to find the operations - structure for this backend. - -*/ -_PUBLIC_ NTSTATUS dcerpc_register_ep_server(const struct dcesrv_endpoint_server *ep_server) + allocate a new association group + */ +static struct dcesrv_assoc_group *dcesrv_assoc_group_new(struct dcesrv_connection *conn) { - - if (dcesrv_ep_server_byname(ep_server->name) != NULL) { - /* its already registered! */ - DEBUG(0,("DCERPC endpoint server '%s' already registered\n", - ep_server->name)); - return NT_STATUS_OBJECT_NAME_COLLISION; - } + struct dcesrv_context *dce_ctx = conn->dce_ctx; + const struct dcesrv_endpoint *endpoint = conn->endpoint; + enum dcerpc_transport_t transport = + dcerpc_binding_get_transport(endpoint->ep_description); + struct dcesrv_assoc_group *assoc_group; + int id; - ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1); - if (!ep_servers) { - smb_panic("out of memory in dcerpc_register"); + assoc_group = talloc_zero(conn, struct dcesrv_assoc_group); + if (assoc_group == NULL) { + return NULL; } - ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server)); - ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name); + id = idr_get_new_random(dce_ctx->assoc_groups_idr, assoc_group, UINT16_MAX); + if (id == -1) { + talloc_free(assoc_group); + DEBUG(0,(__location__ ": Out of association groups!\n")); + return NULL; + } - num_ep_servers++; + assoc_group->transport = transport; + assoc_group->id = id; + assoc_group->dce_ctx = dce_ctx; - DEBUG(3,("DCERPC endpoint server '%s' registered\n", - ep_server->name)); + talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor); - return NT_STATUS_OK; + return assoc_group; } -/* - return the operations structure for a named backend of the specified type -*/ -_PUBLIC_ const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name) +NTSTATUS dcesrv_assoc_group_find(struct dcesrv_call_state *call) { - int i; + /* + if provided, check the assoc_group is valid + */ + if (call->pkt.u.bind.assoc_group_id != 0) { + call->conn->assoc_group = + dcesrv_assoc_group_reference(call->conn, + call->pkt.u.bind.assoc_group_id); + } else { + call->conn->assoc_group = dcesrv_assoc_group_new(call->conn); + } - for (i=0;iname, name) == 0) { - return ep_servers[i].ep_server; - } + /* + * The NETLOGON server does not use handles and so + * there is no need to support association groups, but + * we need to give back a number regardless. + * + * We have to do this when it is not run as a single process, + * because then it can't see the other valid association + * groups. We handle this genericly for all endpoints not + * running in single process mode. + * + * We know which endpoint we are on even before checking the + * iface UUID, so for simplicity we enforce the same policy + * for all interfaces on the endpoint. + * + * This means that where NETLOGON + * shares an endpoint (such as ncalrpc or of 'lsa over + * netlogon' is set) we will still check association groups. + * + */ + + if (call->conn->assoc_group == NULL && + !call->conn->endpoint->use_single_process) { + call->conn->assoc_group + = dcesrv_assoc_group_new(call->conn); + } + + if (call->conn->assoc_group == NULL) { + /* TODO Return correct status */ + return NT_STATUS_UNSUCCESSFUL; } - return NULL; + return NT_STATUS_OK; } void dcerpc_server_init(struct loadparm_context *lp_ctx) @@ -2543,245 +183,6 @@ void dcerpc_server_init(struct loadparm_context *lp_ctx) talloc_free(shared_init); } -/* - return the DCERPC module version, and the size of some critical types - This can be used by endpoint server modules to either detect compilation errors, or provide - multiple implementations for different smbd compilation options in one module -*/ -const struct dcesrv_critical_sizes *dcerpc_module_version(void) -{ - static const struct dcesrv_critical_sizes critical_sizes = { - DCERPC_MODULE_VERSION, - sizeof(struct dcesrv_context), - sizeof(struct dcesrv_endpoint), - sizeof(struct dcesrv_endpoint_server), - sizeof(struct dcesrv_interface), - sizeof(struct dcesrv_if_list), - sizeof(struct dcesrv_connection), - sizeof(struct dcesrv_call_state), - sizeof(struct dcesrv_auth), - sizeof(struct dcesrv_handle) - }; - - return &critical_sizes; -} - -_PUBLIC_ void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason) -{ - struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; - struct dcesrv_auth *a = NULL; - - dce_conn->wait_send = NULL; - dce_conn->wait_recv = NULL; - dce_conn->wait_private = NULL; - - dce_conn->allow_bind = false; - dce_conn->allow_alter = false; - - dce_conn->default_auth_state->auth_invalid = true; - - for (a = dce_conn->auth_states; a != NULL; a = a->next) { - a->auth_invalid = true; - } - - if (dce_conn->pending_call_list == NULL) { - char *full_reason = talloc_asprintf(dce_conn, "dcesrv: %s", reason); - - DLIST_REMOVE(dce_ctx->broken_connections, dce_conn); - dce_conn->transport.terminate_connection(dce_conn, - full_reason ? full_reason : reason); - return; - } - - if (dce_conn->terminate != NULL) { - return; - } - - DEBUG(3,("dcesrv: terminating connection due to '%s' deferred due to pending calls\n", - reason)); - dce_conn->terminate = talloc_strdup(dce_conn, reason); - if (dce_conn->terminate == NULL) { - dce_conn->terminate = "dcesrv: deferred terminating connection - no memory"; - } - DLIST_ADD_END(dce_ctx->broken_connections, dce_conn); -} - -_PUBLIC_ void dcesrv_cleanup_broken_connections(struct dcesrv_context *dce_ctx) -{ - struct dcesrv_connection *cur, *next; - - next = dce_ctx->broken_connections; - while (next != NULL) { - cur = next; - next = cur->next; - - if (cur->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) { - struct dcesrv_connection_context *context_cur, *context_next; - - context_next = cur->contexts; - while (context_next != NULL) { - context_cur = context_next; - context_next = context_cur->next; - - dcesrv_connection_context_destructor(context_cur); - } - } - - dcesrv_terminate_connection(cur, cur->terminate); - } -} - -/* We need this include to be able to compile on some plateforms - * (ie. freebsd 7.2) as it seems that is not included - * correctly. - * It has to be that deep because otherwise we have a conflict on - * const struct dcesrv_interface declaration. - * This is mostly due to socket_wrapper defining #define bind swrap_bind - * which conflict with the bind used before. - */ -#include "system/network.h" - -struct dcesrv_sock_reply_state { - struct dcesrv_connection *dce_conn; - struct dcesrv_call_state *call; - struct iovec iov; -}; - -static void dcesrv_sock_reply_done(struct tevent_req *subreq); -static void dcesrv_call_terminate_step1(struct tevent_req *subreq); - -_PUBLIC_ void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn) -{ - struct dcesrv_call_state *call; - - call = dce_conn->call_list; - if (!call || !call->replies) { - return; - } - - while (call->replies) { - struct data_blob_list_item *rep = call->replies; - struct dcesrv_sock_reply_state *substate; - struct tevent_req *subreq; - - substate = talloc_zero(call, struct dcesrv_sock_reply_state); - if (!substate) { - dcesrv_terminate_connection(dce_conn, "no memory"); - return; - } - - substate->dce_conn = dce_conn; - substate->call = NULL; - - DLIST_REMOVE(call->replies, rep); - - if (call->replies == NULL && call->terminate_reason == NULL) { - substate->call = call; - } - - substate->iov.iov_base = (void *) rep->blob.data; - substate->iov.iov_len = rep->blob.length; - - subreq = tstream_writev_queue_send(substate, - dce_conn->event_ctx, - dce_conn->stream, - dce_conn->send_queue, - &substate->iov, 1); - if (!subreq) { - dcesrv_terminate_connection(dce_conn, "no memory"); - return; - } - tevent_req_set_callback(subreq, dcesrv_sock_reply_done, - substate); - } - - if (call->terminate_reason != NULL) { - struct tevent_req *subreq; - - subreq = tevent_queue_wait_send(call, - dce_conn->event_ctx, - dce_conn->send_queue); - if (!subreq) { - dcesrv_terminate_connection(dce_conn, __location__); - return; - } - tevent_req_set_callback(subreq, dcesrv_call_terminate_step1, - call); - } - - DLIST_REMOVE(call->conn->call_list, call); - call->list = DCESRV_LIST_NONE; -} - -static void dcesrv_sock_reply_done(struct tevent_req *subreq) -{ - struct dcesrv_sock_reply_state *substate = tevent_req_callback_data(subreq, - struct dcesrv_sock_reply_state); - int ret; - int sys_errno; - NTSTATUS status; - struct dcesrv_call_state *call = substate->call; - - ret = tstream_writev_queue_recv(subreq, &sys_errno); - TALLOC_FREE(subreq); - if (ret == -1) { - status = map_nt_error_from_unix_common(sys_errno); - dcesrv_terminate_connection(substate->dce_conn, nt_errstr(status)); - return; - } - - talloc_free(substate); - if (call) { - talloc_free(call); - } -} - -static void dcesrv_call_terminate_step2(struct tevent_req *subreq); - -static void dcesrv_call_terminate_step1(struct tevent_req *subreq) -{ - struct dcesrv_call_state *call = tevent_req_callback_data(subreq, - struct dcesrv_call_state); - bool ok; - struct timeval tv; - - /* make sure we stop send queue before removing subreq */ - tevent_queue_stop(call->conn->send_queue); - - ok = tevent_queue_wait_recv(subreq); - TALLOC_FREE(subreq); - if (!ok) { - dcesrv_terminate_connection(call->conn, __location__); - return; - } - - /* disconnect after 200 usecs */ - tv = timeval_current_ofs_usec(200); - subreq = tevent_wakeup_send(call, call->conn->event_ctx, tv); - if (subreq == NULL) { - dcesrv_terminate_connection(call->conn, __location__); - return; - } - tevent_req_set_callback(subreq, dcesrv_call_terminate_step2, - call); -} - -static void dcesrv_call_terminate_step2(struct tevent_req *subreq) -{ - struct dcesrv_call_state *call = tevent_req_callback_data(subreq, - struct dcesrv_call_state); - bool ok; - - ok = tevent_wakeup_recv(subreq); - TALLOC_FREE(subreq); - if (!ok) { - dcesrv_terminate_connection(call->conn, __location__); - return; - } - - dcesrv_terminate_connection(call->conn, call->terminate_reason); -} - struct dcesrv_socket_context { const struct dcesrv_endpoint *endpoint; struct dcesrv_context *dcesrv_ctx; @@ -2921,107 +322,6 @@ static void dcesrv_sock_accept(struct stream_connection *srv_conn) return; } -static void dcesrv_conn_wait_done(struct tevent_req *subreq); - -static void dcesrv_read_fragment_done(struct tevent_req *subreq) -{ - struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq, - struct dcesrv_connection); - struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; - struct ncacn_packet *pkt; - DATA_BLOB buffer; - NTSTATUS status; - - if (dce_conn->terminate) { - /* - * if the current connection is broken - * we need to clean it up before any other connection - */ - dcesrv_terminate_connection(dce_conn, dce_conn->terminate); - dcesrv_cleanup_broken_connections(dce_ctx); - return; - } - - dcesrv_cleanup_broken_connections(dce_ctx); - - status = dcerpc_read_ncacn_packet_recv(subreq, dce_conn, - &pkt, &buffer); - TALLOC_FREE(subreq); - if (!NT_STATUS_IS_OK(status)) { - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } - - status = dcesrv_process_ncacn_packet(dce_conn, pkt, buffer); - if (!NT_STATUS_IS_OK(status)) { - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } - - /* - * This is used to block the connection during - * pending authentication. - */ - if (dce_conn->wait_send != NULL) { - subreq = dce_conn->wait_send(dce_conn, - dce_conn->event_ctx, - dce_conn->wait_private); - if (!subreq) { - status = NT_STATUS_NO_MEMORY; - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } - tevent_req_set_callback(subreq, dcesrv_conn_wait_done, dce_conn); - return; - } - - subreq = dcerpc_read_ncacn_packet_send(dce_conn, - dce_conn->event_ctx, - dce_conn->stream); - if (!subreq) { - status = NT_STATUS_NO_MEMORY; - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } - tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dce_conn); -} - -static void dcesrv_conn_wait_done(struct tevent_req *subreq) -{ - struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq, - struct dcesrv_connection); - struct dcesrv_context *dce_ctx = dce_conn->dce_ctx; - NTSTATUS status; - - if (dce_conn->terminate) { - /* - * if the current connection is broken - * we need to clean it up before any other connection - */ - dcesrv_terminate_connection(dce_conn, dce_conn->terminate); - dcesrv_cleanup_broken_connections(dce_ctx); - return; - } - - dcesrv_cleanup_broken_connections(dce_ctx); - - status = dce_conn->wait_recv(subreq); - dce_conn->wait_send = NULL; - dce_conn->wait_recv = NULL; - dce_conn->wait_private = NULL; - TALLOC_FREE(subreq); - if (!NT_STATUS_IS_OK(status)) { - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } - - status = dcesrv_connection_loop_start(dce_conn); - if (!NT_STATUS_IS_OK(status)) { - dcesrv_terminate_connection(dce_conn, nt_errstr(status)); - return; - } -} - static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags) { struct dcesrv_connection *dce_conn = talloc_get_type(conn->private_data, @@ -3318,68 +618,6 @@ NTSTATUS dcesrv_add_ep(struct dcesrv_context *dce_ctx, } } - -/** - * retrieve credentials from a dce_call - */ -_PUBLIC_ struct cli_credentials *dcesrv_call_credentials(struct dcesrv_call_state *dce_call) -{ - struct dcesrv_auth *auth = dce_call->auth_state; - SMB_ASSERT(auth->auth_finished); - return auth->session_info->credentials; -} - -/** - * returns true if this is an authenticated call - */ -_PUBLIC_ bool dcesrv_call_authenticated(struct dcesrv_call_state *dce_call) -{ - struct dcesrv_auth *auth = dce_call->auth_state; - enum security_user_level level; - SMB_ASSERT(auth->auth_finished); - level = security_session_user_level(auth->session_info, NULL); - return level >= SECURITY_USER; -} - -/** - * retrieve account_name for a dce_call - */ -_PUBLIC_ const char *dcesrv_call_account_name(struct dcesrv_call_state *dce_call) -{ - struct dcesrv_auth *auth = dce_call->auth_state; - SMB_ASSERT(auth->auth_finished); - return auth->session_info->info->account_name; -} - -/** - * retrieve session_info from a dce_call - */ -_PUBLIC_ struct auth_session_info *dcesrv_call_session_info(struct dcesrv_call_state *dce_call) -{ - struct dcesrv_auth *auth = dce_call->auth_state; - SMB_ASSERT(auth->auth_finished); - return auth->session_info; -} - -/** - * retrieve auth type/level from a dce_call - */ -_PUBLIC_ void dcesrv_call_auth_info(struct dcesrv_call_state *dce_call, - enum dcerpc_AuthType *auth_type, - enum dcerpc_AuthLevel *auth_level) -{ - struct dcesrv_auth *auth = dce_call->auth_state; - - SMB_ASSERT(auth->auth_finished); - - if (auth_type != NULL) { - *auth_type = auth->auth_type; - } - if (auth_level != NULL) { - *auth_level = auth->auth_level; - } -} - _PUBLIC_ struct imessaging_context *dcesrv_imessaging_context( struct dcesrv_connection *conn) { @@ -3471,18 +709,3 @@ void dcesrv_transport_terminate_connection(struct dcesrv_connection *dce_conn, struct stream_connection); stream_terminate_connection(srv_conn, reason); } - -_PUBLIC_ NTSTATUS dcesrv_connection_loop_start(struct dcesrv_connection *conn) -{ - struct tevent_req *subreq; - - subreq = dcerpc_read_ncacn_packet_send(conn, - conn->event_ctx, - conn->stream); - if (subreq == NULL) { - return NT_STATUS_NO_MEMORY; - } - tevent_req_set_callback(subreq, dcesrv_read_fragment_done, conn); - - return NT_STATUS_OK; -} diff --git a/source4/rpc_server/wscript_build b/source4/rpc_server/wscript_build index 66cea942087..8d896c1722f 100644 --- a/source4/rpc_server/wscript_build +++ b/source4/rpc_server/wscript_build @@ -22,7 +22,7 @@ bld.SAMBA_SUBSYSTEM('DCERPC_COMMON', ) bld.SAMBA_LIBRARY('dcerpc_server', - source='dcerpc_server.c dcesrv_auth.c dcesrv_mgmt.c handles.c dcesrv_reply.c', + source='dcerpc_server.c handles.c', pc_files='dcerpc_server.pc', deps='LIBCLI_AUTH ndr samba_server_gensec service auth', public_deps='dcerpc dcerpc-server-core',