*/
#include "includes.h"
-#include "system/filesys.h"
-#include "srv_pipe_internal.h"
-#include "../librpc/gen_ndr/ndr_dcerpc.h"
-#include "../librpc/rpc/rpc_common.h"
-#include "dcesrv_auth_generic.h"
#include "rpc_server.h"
-#include "rpc_dce.h"
-#include "smbd/smbd.h"
-#include "auth.h"
-#include "ntdomain.h"
#include "rpc_server/srv_pipe.h"
-#include "rpc_server/rpc_contexts.h"
-#include "lib/param/param.h"
-#include "librpc/ndr/ndr_table.h"
-#include "auth/gensec/gensec.h"
-#include "librpc/ndr/ndr_dcerpc.h"
-#include "lib/tsocket/tsocket.h"
-#include "../librpc/gen_ndr/ndr_samr.h"
-#include "../librpc/gen_ndr/ndr_lsa.h"
-#include "../librpc/gen_ndr/ndr_netlogon.h"
-#include "../librpc/gen_ndr/ndr_epmapper.h"
-#include "../librpc/gen_ndr/ndr_echo.h"
-#include "../librpc/gen_ndr/ndr_winspool.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
-static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p);
-
-/**
- * Dump everything from the start of the end up of the provided data
- * into a file, but only at debug level >= 50
- **/
-static void dump_pdu_region(const char *name, int v,
- DATA_BLOB *data, size_t start, size_t end)
-{
- int fd, i;
- char *fname = NULL;
- ssize_t sz;
-
- if (DEBUGLEVEL < 50) return;
-
- if (start > data->length || end > data->length || start > end) return;
-
- for (i = 1; i < 100; i++) {
- if (v != -1) {
- fname = talloc_asprintf(talloc_tos(),
- "/tmp/%s_%d.%d.prs",
- name, v, i);
- } else {
- fname = talloc_asprintf(talloc_tos(),
- "/tmp/%s_%d.prs",
- name, i);
- }
- if (!fname) {
- return;
- }
- fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
- if (fd != -1 || errno != EEXIST) break;
- }
- if (fd != -1) {
- sz = write(fd, data->data + start, end - start);
- i = close(fd);
- if ((sz != end - start) || (i != 0) ) {
- DEBUG(0, ("Error writing/closing %s: %ld!=%ld %d\n",
- fname, (unsigned long)sz,
- (unsigned long)end - start, i));
- } else {
- DEBUG(0,("created %s\n", fname));
- }
- }
- TALLOC_FREE(fname);
-}
-
-static DATA_BLOB generic_session_key(void)
-{
- return data_blob_const("SystemLibraryDTC", 16);
-}
-
-/*******************************************************************
- Generate the next PDU to be returned from the data.
-********************************************************************/
-
-static NTSTATUS create_next_packet(TALLOC_CTX *mem_ctx,
- struct pipe_auth_data *auth,
- uint32_t call_id,
- DATA_BLOB *rdata,
- size_t data_sent_length,
- DATA_BLOB *frag,
- size_t *pdu_size)
-{
- union dcerpc_payload u;
- uint8_t pfc_flags;
- size_t data_left;
- size_t data_to_send;
- size_t frag_len;
- size_t pad_len = 0;
- size_t auth_len = 0;
- NTSTATUS status;
-
- ZERO_STRUCT(u.response);
-
- /* Set up rpc packet pfc flags. */
- if (data_sent_length == 0) {
- pfc_flags = DCERPC_PFC_FLAG_FIRST;
- } else {
- pfc_flags = 0;
- }
-
- /* Work out how much we can fit in a single PDU. */
- data_left = rdata->length - data_sent_length;
-
- /* Ensure there really is data left to send. */
- if (!data_left) {
- DEBUG(0, ("No data left to send !\n"));
- return NT_STATUS_BUFFER_TOO_SMALL;
- }
-
- status = dcerpc_guess_sizes(auth,
- DCERPC_RESPONSE_LENGTH,
- data_left,
- RPC_MAX_PDU_FRAG_LEN,
- &data_to_send, &frag_len,
- &auth_len, &pad_len);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- /* Set up the alloc hint. This should be the data left to send. */
- u.response.alloc_hint = data_left;
-
- /* Work out if this PDU will be the last. */
- if (data_sent_length + data_to_send >= rdata->length) {
- pfc_flags |= DCERPC_PFC_FLAG_LAST;
- }
-
- /* Prepare data to be NDR encoded. */
- u.response.stub_and_verifier =
- data_blob_const(rdata->data + data_sent_length, data_to_send);
-
- /* Store the packet in the data stream. */
- status = dcerpc_push_ncacn_packet(mem_ctx, DCERPC_PKT_RESPONSE,
- pfc_flags, auth_len, call_id,
- &u, frag);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to marshall RPC Packet.\n"));
- return status;
- }
-
- if (auth_len) {
- /* Set the proper length on the pdu, including padding.
- * Only needed if an auth trailer will be appended. */
- dcerpc_set_frag_length(frag, frag->length
- + pad_len
- + DCERPC_AUTH_TRAILER_LENGTH
- + auth_len);
- }
-
- if (auth_len) {
- status = dcerpc_add_auth_footer(auth, pad_len, frag);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(frag);
- return status;
- }
- }
-
- *pdu_size = data_to_send;
- return NT_STATUS_OK;
-}
-
-/*******************************************************************
- Generate the next PDU to be returned from the data in p->rdata.
-********************************************************************/
-
-bool create_next_pdu(struct pipes_struct *p)
-{
- size_t pdu_size = 0;
- NTSTATUS status;
-
- /*
- * If we're in the fault state, keep returning fault PDU's until
- * the pipe gets closed. JRA.
- */
- if (p->fault_state) {
- setup_fault_pdu(p, NT_STATUS(p->fault_state));
- return true;
- }
-
- status = create_next_packet(p->mem_ctx, &p->auth,
- p->call_id, &p->out_data.rdata,
- p->out_data.data_sent_length,
- &p->out_data.frag, &pdu_size);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to create packet with error %s, "
- "(auth level %u / type %u)\n",
- nt_errstr(status),
- (unsigned int)p->auth.auth_level,
- (unsigned int)p->auth.auth_type));
- return false;
- }
-
- /* Setup the counts for this PDU. */
- p->out_data.data_sent_length += pdu_size;
- p->out_data.current_pdu_sent = 0;
- return true;
-}
-
-
-static bool pipe_init_outgoing_data(struct pipes_struct *p);
-
-/*******************************************************************
- Marshall a bind_nak pdu.
-*******************************************************************/
-
-static bool setup_bind_nak(struct pipes_struct *p, struct ncacn_packet *pkt)
-{
- NTSTATUS status;
- union dcerpc_payload u;
-
- /* Free any memory in the current return data buffer. */
- pipe_init_outgoing_data(p);
-
- /*
- * Initialize a bind_nak header.
- */
-
- ZERO_STRUCT(u);
-
- u.bind_nak.reject_reason = 0;
-
- /*
- * Marshall directly into the outgoing PDU space. We
- * must do this as we need to set to the bind response
- * header and are never sending more than one PDU here.
- */
-
- status = dcerpc_push_ncacn_packet(p->mem_ctx,
- DCERPC_PKT_BIND_NAK,
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST,
- 0,
- pkt->call_id,
- &u,
- &p->out_data.frag);
- if (!NT_STATUS_IS_OK(status)) {
- return False;
- }
-
- p->out_data.data_sent_length = 0;
- p->out_data.current_pdu_sent = 0;
-
- set_incoming_fault(p);
- TALLOC_FREE(p->auth.auth_ctx);
- p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
- p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
- p->pipe_bound = False;
- p->allow_bind = false;
- p->allow_alter = false;
- p->allow_auth3 = false;
-
- return True;
-}
-
-/*******************************************************************
- Marshall a fault pdu.
-*******************************************************************/
-
-bool setup_fault_pdu(struct pipes_struct *p, NTSTATUS fault_status)
-{
- NTSTATUS status;
- union dcerpc_payload u;
-
- /* Free any memory in the current return data buffer. */
- pipe_init_outgoing_data(p);
-
- /*
- * Initialize a fault header.
- */
-
- ZERO_STRUCT(u);
-
- u.fault.status = NT_STATUS_V(fault_status);
-
- /*
- * Marshall directly into the outgoing PDU space. We
- * must do this as we need to set to the bind response
- * header and are never sending more than one PDU here.
- */
-
- status = dcerpc_push_ncacn_packet(p->mem_ctx,
- DCERPC_PKT_FAULT,
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
- 0,
- p->call_id,
- &u,
- &p->out_data.frag);
- if (!NT_STATUS_IS_OK(status)) {
- return False;
- }
-
- p->out_data.data_sent_length = 0;
- p->out_data.current_pdu_sent = 0;
-
- return True;
-}
-
-/*******************************************************************
- Ensure a bind request has the correct abstract & transfer interface.
- Used to reject unknown binds from Win2k.
-*******************************************************************/
-
-static bool check_bind_req(struct pipes_struct *p,
- struct ndr_syntax_id* abstract,
- struct ndr_syntax_id* transfer,
- uint32_t context_id)
-{
- struct pipe_rpc_fns *context_fns;
- bool ok;
- const char *interface_name = NULL;
-
- DEBUG(3,("check_bind_req for %s context_id=%u\n",
- ndr_interface_name(&abstract->uuid,
- abstract->if_version),
- (unsigned)context_id));
-
- ok = ndr_syntax_id_equal(transfer, &ndr_transfer_syntax_ndr);
- if (!ok) {
- DEBUG(1,("check_bind_req unknown transfer syntax for "
- "%s context_id=%u\n",
- ndr_interface_name(&abstract->uuid,
- abstract->if_version),
- (unsigned)context_id));
- return false;
- }
-
- for (context_fns = p->contexts;
- context_fns != NULL;
- context_fns = context_fns->next)
- {
- if (context_fns->context_id != context_id) {
- continue;
- }
-
- ok = ndr_syntax_id_equal(&context_fns->syntax,
- abstract);
- if (ok) {
- return true;
- }
-
- DEBUG(1,("check_bind_req: changing abstract syntax for "
- "%s context_id=%u into %s not supported\n",
- ndr_interface_name(&context_fns->syntax.uuid,
- context_fns->syntax.if_version),
- (unsigned)context_id,
- ndr_interface_name(&abstract->uuid,
- abstract->if_version)));
- return false;
- }
-
- /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
- if (!rpc_srv_pipe_exists_by_id(abstract)) {
- return false;
- }
-
- DEBUG(3, ("check_bind_req: %s -> %s rpc service\n",
- rpc_srv_get_pipe_cli_name(abstract),
- rpc_srv_get_pipe_srv_name(abstract)));
-
- ok = init_pipe_handles(p, abstract);
- if (!ok) {
- DEBUG(1, ("Failed to init pipe handles!\n"));
- return false;
- }
-
- context_fns = talloc_zero(p, struct pipe_rpc_fns);
- if (context_fns == NULL) {
- DEBUG(0,("check_bind_req: talloc() failed!\n"));
- return false;
- }
-
- interface_name = ndr_interface_name(&abstract->uuid,
- abstract->if_version);
- SMB_ASSERT(interface_name != NULL);
-
- context_fns->next = context_fns->prev = NULL;
- context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(abstract);
- context_fns->cmds = rpc_srv_get_pipe_cmds(abstract);
- context_fns->context_id = context_id;
- context_fns->syntax = *abstract;
-
- context_fns->allow_connect = lp_allow_dcerpc_auth_level_connect();
- /*
- * for the samr, lsarpc and netlogon interfaces we don't allow "connect"
- * auth_level by default.
- */
- ok = ndr_syntax_id_equal(abstract, &ndr_table_samr.syntax_id);
- if (ok) {
- context_fns->allow_connect = false;
- }
- ok = ndr_syntax_id_equal(abstract, &ndr_table_lsarpc.syntax_id);
- if (ok) {
- context_fns->allow_connect = false;
- }
- ok = ndr_syntax_id_equal(abstract, &ndr_table_netlogon.syntax_id);
- if (ok) {
- context_fns->allow_connect = false;
- }
- /*
- * for the epmapper and echo interfaces we allow "connect"
- * auth_level by default.
- */
- ok = ndr_syntax_id_equal(abstract, &ndr_table_epmapper.syntax_id);
- if (ok) {
- context_fns->allow_connect = true;
- }
- ok = ndr_syntax_id_equal(abstract, &ndr_table_rpcecho.syntax_id);
- if (ok) {
- context_fns->allow_connect = true;
- }
- /*
- * every interface can be modified to allow "connect" auth_level by
- * using a parametric option like:
- * allow dcerpc auth level connect:<interface>
- * e.g.
- * allow dcerpc auth level connect:samr = yes
- */
- context_fns->allow_connect = lp_parm_bool(-1,
- "allow dcerpc auth level connect",
- interface_name, context_fns->allow_connect);
-
- ok = ndr_syntax_id_equal(abstract, &ndr_table_iremotewinspool.syntax_id);
- if (ok) {
- context_fns->min_auth_level = DCERPC_AUTH_LEVEL_PACKET;
- }
-
- /* add to the list of open contexts */
-
- DLIST_ADD( p->contexts, context_fns );
-
- return True;
-}
-
/**
* Is a named pipe known?
* @param[in] dce_ctx The rpc server context
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
-
-/*******************************************************************
- Handle an NTLMSSP bind auth.
-*******************************************************************/
-
-static bool pipe_auth_generic_bind(struct pipes_struct *p,
- struct ncacn_packet *pkt,
- struct dcerpc_auth *auth_info,
- const char *service_description,
- DATA_BLOB *response)
-{
- TALLOC_CTX *mem_ctx = pkt;
- struct gensec_security *gensec_security = NULL;
- NTSTATUS status;
-
- status = auth_generic_server_authtype_start(p,
- auth_info->auth_type,
- auth_info->auth_level,
- p->remote_address,
- p->local_address,
- service_description,
- &gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, (__location__ ": auth_generic_server_authtype_start[%u/%u] failed: %s\n",
- auth_info->auth_type, auth_info->auth_level, nt_errstr(status)));
- return false;
- }
-
- p->auth.auth_ctx = gensec_security;
- p->auth.auth_type = auth_info->auth_type;
- p->auth.auth_level = auth_info->auth_level;
- p->auth.auth_context_id = auth_info->auth_context_id;
-
- if (pkt->pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN) {
- p->auth.client_hdr_signing = true;
- p->auth.hdr_signing = gensec_have_feature(gensec_security,
- GENSEC_FEATURE_SIGN_PKT_HEADER);
- }
-
- if (p->auth.hdr_signing) {
- gensec_want_feature(gensec_security,
- GENSEC_FEATURE_SIGN_PKT_HEADER);
- }
-
- status = auth_generic_server_step(gensec_security, mem_ctx,
- &auth_info->credentials,
- response);
- if (!NT_STATUS_IS_OK(status) &&
- !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED))
- {
- DEBUG(2, (__location__ ": "
- "auth_generic_server_step[%u/%u] failed: %s\n",
- auth_info->auth_type, auth_info->auth_level,
- nt_errstr(status)));
- return false;
- }
-
- if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- return true;
- }
-
- status = pipe_auth_verify_final(p);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("pipe_auth_verify_final failed: %s\n",
- nt_errstr(status)));
- return false;
- }
-
- return true;
-}
-
-/*******************************************************************
- Process an NTLMSSP authentication response.
- If this function succeeds, the user has been authenticated
- and their domain, name and calling workstation stored in
- the pipe struct.
-*******************************************************************/
-
-static bool pipe_auth_generic_verify_final(TALLOC_CTX *mem_ctx,
- struct gensec_security *gensec_security,
- enum dcerpc_AuthLevel auth_level,
- struct auth_session_info **session_info)
-{
- NTSTATUS status;
- bool ret;
-
- DEBUG(5, (__location__ ": checking user details\n"));
-
- /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
- ensure the underlying NTLMSSP flags are also set. If not we should
- refuse the bind. */
-
- status = auth_generic_server_check_flags(gensec_security,
- (auth_level >=
- DCERPC_AUTH_LEVEL_PACKET),
- (auth_level ==
- DCERPC_AUTH_LEVEL_PRIVACY));
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, (__location__ ": Client failed to negotiate proper "
- "security for rpc connection\n"));
- return false;
- }
-
- TALLOC_FREE(*session_info);
-
- status = auth_generic_server_get_user_info(gensec_security,
- mem_ctx, session_info);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, (__location__ ": failed to obtain the server info "
- "for authenticated user: %s\n", nt_errstr(status)));
- return false;
- }
-
- if ((*session_info)->security_token == NULL) {
- DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
- return false;
- }
-
- if ((*session_info)->unix_token == NULL) {
- DEBUG(1, ("Auth module failed to provide unix_token\n"));
- return false;
- }
-
- /*
- * We're an authenticated bind over smb, so the session key needs to
- * be set to "SystemLibraryDTC". Weird, but this is what Windows
- * does. See the RPC-SAMBA3SESSIONKEY.
- */
-
- ret = session_info_set_session_key((*session_info), generic_session_key());
- if (!ret) {
- DEBUG(0, ("Failed to set session key!\n"));
- return false;
- }
-
- return true;
-}
-
-static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p)
-{
- struct gensec_security *gensec_security;
- bool ok;
-
- if (p->auth.auth_type == DCERPC_AUTH_TYPE_NONE) {
- p->pipe_bound = true;
- return NT_STATUS_OK;
- }
-
- gensec_security = p->auth.auth_ctx;
-
- ok = pipe_auth_generic_verify_final(p, gensec_security,
- p->auth.auth_level,
- &p->session_info);
- if (!ok) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- p->pipe_bound = true;
-
- return NT_STATUS_OK;
-}
-
-/*******************************************************************
- Respond to a pipe bind request.
-*******************************************************************/
-
-static bool api_pipe_bind_req(struct pipes_struct *p,
- struct ncacn_packet *pkt)
-{
- struct dcerpc_auth auth_info = {0};
- uint16_t assoc_gid;
- NTSTATUS status;
- struct ndr_syntax_id id;
- uint8_t pfc_flags = 0;
- union dcerpc_payload u;
- struct dcerpc_ack_ctx bind_ack_ctx;
- DATA_BLOB auth_resp = data_blob_null;
- DATA_BLOB auth_blob = data_blob_null;
- const struct ndr_interface_table *table;
- const char *secondary_address = NULL;
-
- if (!p->allow_bind) {
- DEBUG(2,("Pipe not in allow bind state\n"));
- return setup_bind_nak(p, pkt);
- }
- p->allow_bind = false;
-
- status = dcerpc_verify_ncacn_packet_header(pkt,
- DCERPC_PKT_BIND,
- 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)) {
- DEBUG(1, ("api_pipe_bind_req: invalid pdu: %s\n",
- nt_errstr(status)));
- NDR_PRINT_DEBUG(ncacn_packet, pkt);
- goto err_exit;
- }
-
- if (pkt->u.bind.num_contexts == 0) {
- DEBUG(1, ("api_pipe_bind_req: no rpc contexts around\n"));
- goto err_exit;
- }
-
- if (pkt->u.bind.ctx_list[0].num_transfer_syntaxes == 0) {
- DEBUG(1, ("api_pipe_bind_req: no transfer syntaxes around\n"));
- goto err_exit;
- }
-
- /*
- * Try and find the correct pipe name to ensure
- * that this is a pipe name we support.
- */
- id = pkt->u.bind.ctx_list[0].abstract_syntax;
-
- table = ndr_table_by_uuid(&id.uuid);
- if (table == NULL) {
- char *iface = ndr_syntax_id_to_string(talloc_tos(), &id);
- DBG_NOTICE("unknown interface %s\n",
- iface ? iface : "<null>");
- TALLOC_FREE(iface);
- return false;
- }
-
- if (rpc_srv_pipe_exists_by_id(&id)) {
- DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
- rpc_srv_get_pipe_cli_name(&id),
- rpc_srv_get_pipe_srv_name(&id)));
- } else {
- status = smb_probe_module(
- "rpc", dcerpc_default_transport_endpoint(pkt,
- NCACN_NP, table));
-
- if (NT_STATUS_IS_ERR(status)) {
- DEBUG(3,("api_pipe_bind_req: Unknown rpc service name "
- "%s in bind request.\n",
- ndr_interface_name(&id.uuid,
- id.if_version)));
-
- return setup_bind_nak(p, pkt);
- }
-
- if (rpc_srv_get_pipe_interface_by_cli_name(
- dcerpc_default_transport_endpoint(pkt,
- NCACN_NP, table),
- &id)) {
- DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
- rpc_srv_get_pipe_cli_name(&id),
- rpc_srv_get_pipe_srv_name(&id)));
- } else {
- DEBUG(0, ("module %s doesn't provide functions for "
- "pipe %s!\n",
- ndr_interface_name(&id.uuid,
- id.if_version),
- ndr_interface_name(&id.uuid,
- id.if_version)));
- return setup_bind_nak(p, pkt);
- }
- }
-
- DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
-
- if (pkt->u.bind.assoc_group_id != 0) {
- assoc_gid = pkt->u.bind.assoc_group_id;
- } else {
- assoc_gid = 0x53f0;
- }
-
- /*
- * Create the bind response struct.
- */
-
- /* If the requested abstract synt uuid doesn't match our client pipe,
- reject the bind_ack & set the transfer interface synt to all 0's,
- ver 0 (observed when NT5 attempts to bind to abstract interfaces
- unknown to NT4)
- Needed when adding entries to a DACL from NT5 - SK */
-
- if (check_bind_req(p,
- &pkt->u.bind.ctx_list[0].abstract_syntax,
- &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
- pkt->u.bind.ctx_list[0].context_id)) {
-
- bind_ack_ctx.result = 0;
- bind_ack_ctx.reason.value = 0;
- bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
- } else {
- /* Rejection reason: abstract syntax not supported */
- bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
- bind_ack_ctx.reason.value = DCERPC_BIND_REASON_ASYNTAX;
- bind_ack_ctx.syntax = ndr_syntax_id_null;
- }
-
- /*
- * Check if this is an authenticated bind request.
- */
- if (pkt->auth_length) {
- /*
- * Decode the authentication verifier.
- */
- status = dcerpc_pull_auth_trailer(pkt, pkt,
- &pkt->u.bind.auth_info,
- &auth_info, NULL, true);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
- goto err_exit;
- }
-
- if (!pipe_auth_generic_bind(p, pkt,
- &auth_info,
- table->name,
- &auth_resp)) {
- goto err_exit;
- }
- } else {
- TALLOC_CTX *frame = talloc_stackframe();
- struct auth4_context *auth4_context;
- const char *transport_protection = AUTHZ_TRANSPORT_PROTECTION_NONE;
- if (p->transport == NCACN_NP) {
- transport_protection = AUTHZ_TRANSPORT_PROTECTION_SMB;
- }
-
- p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
- p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
- p->auth.auth_context_id = 0;
-
- become_root();
- status = make_auth4_context(frame, &auth4_context);
- unbecome_root();
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Unable to make auth context for authz log.\n"));
- TALLOC_FREE(frame);
- goto err_exit;
- }
-
- /*
- * Log the authorization to this RPC interface. This
- * covered ncacn_np pass-through auth, and anonymous
- * DCE/RPC (eg epmapper, netlogon etc)
- */
- log_successful_authz_event(auth4_context->msg_ctx,
- auth4_context->lp_ctx,
- p->remote_address,
- p->local_address,
- table->name,
- derpc_transport_string_by_transport(p->transport),
- transport_protection,
- p->session_info);
- TALLOC_FREE(frame);
- }
-
- ZERO_STRUCT(u.bind_ack);
- u.bind_ack.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
- u.bind_ack.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
- u.bind_ack.assoc_group_id = assoc_gid;
-
- switch (p->transport) {
- case NCACN_IP_TCP:
- secondary_address = talloc_asprintf(pkt, "%d",
- tsocket_address_inet_port(p->local_address));
- break;
- case NCACN_NP:
- default:
- /* name has to be \PIPE\xxxxx */
- secondary_address =
- talloc_asprintf(pkt, "\\PIPE\\%s",
- rpc_srv_get_pipe_srv_name(&id));
- break;
- }
-
- if (secondary_address == NULL) {
- DEBUG(0, ("Out of memory!\n"));
- goto err_exit;
- }
-
- u.bind_ack.secondary_address = secondary_address;
- u.bind_ack.secondary_address_size =
- strlen(u.bind_ack.secondary_address) + 1;
-
- u.bind_ack.num_results = 1;
- u.bind_ack.ctx_list = &bind_ack_ctx;
-
- /* NOTE: We leave the auth_info empty so we can calculate the padding
- * later and then append the auth_info --simo */
-
- /*
- * Marshall directly into the outgoing PDU space. We
- * must do this as we need to set to the bind response
- * header and are never sending more than one PDU here.
- */
-
- pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
-
- if (p->auth.hdr_signing) {
- pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
- }
-
- status = dcerpc_push_ncacn_packet(p->mem_ctx,
- DCERPC_PKT_BIND_ACK,
- pfc_flags,
- auth_resp.length,
- pkt->call_id,
- &u,
- &p->out_data.frag);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
- nt_errstr(status)));
- goto err_exit;
- }
-
- if (auth_resp.length) {
- status = dcerpc_push_dcerpc_auth(pkt,
- p->auth.auth_type,
- p->auth.auth_level,
- 0, /* pad_len */
- p->auth.auth_context_id,
- &auth_resp,
- &auth_blob);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
- goto err_exit;
- }
- }
-
- /* Now that we have the auth len store it into the right place in
- * the dcerpc header */
- dcerpc_set_frag_length(&p->out_data.frag,
- p->out_data.frag.length + auth_blob.length);
-
- if (auth_blob.length) {
-
- if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
- auth_blob.data, auth_blob.length)) {
- DEBUG(0, ("Append of auth info failed.\n"));
- goto err_exit;
- }
- }
-
- /*
- * Setup the lengths for the initial reply.
- */
-
- p->out_data.data_sent_length = 0;
- p->out_data.current_pdu_sent = 0;
-
- TALLOC_FREE(auth_blob.data);
-
- if (bind_ack_ctx.result == 0) {
- p->allow_alter = true;
- p->allow_auth3 = true;
- if (p->auth.auth_type == DCERPC_AUTH_TYPE_NONE) {
- status = pipe_auth_verify_final(p);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("pipe_auth_verify_final failed: %s\n",
- nt_errstr(status)));
- goto err_exit;
- }
- }
- } else {
- goto err_exit;
- }
-
- return True;
-
- err_exit:
-
- data_blob_free(&p->out_data.frag);
- TALLOC_FREE(auth_blob.data);
- return setup_bind_nak(p, pkt);
-}
-
-/*******************************************************************
- This is the "stage3" response after a bind request and reply.
-*******************************************************************/
-
-bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
-{
- struct dcerpc_auth auth_info;
- DATA_BLOB response = data_blob_null;
- struct gensec_security *gensec_security;
- NTSTATUS status;
-
- DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
-
- if (!p->allow_auth3) {
- DEBUG(1, ("Pipe not in allow auth3 state.\n"));
- goto err;
- }
-
- status = dcerpc_verify_ncacn_packet_header(pkt,
- DCERPC_PKT_AUTH3,
- 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)) {
- DEBUG(1, ("api_pipe_bind_auth3: invalid pdu: %s\n",
- nt_errstr(status)));
- NDR_PRINT_DEBUG(ncacn_packet, pkt);
- goto err;
- }
-
- /* We can only finish if the pipe is unbound for now */
- if (p->pipe_bound) {
- DEBUG(0, (__location__ ": Pipe already bound, "
- "AUTH3 not supported!\n"));
- goto err;
- }
-
- if (pkt->auth_length == 0) {
- DEBUG(1, ("No auth field sent for auth3 request!\n"));
- goto err;
- }
-
- /*
- * Decode the authentication verifier response.
- */
-
- status = dcerpc_pull_auth_trailer(pkt, pkt,
- &pkt->u.auth3.auth_info,
- &auth_info, NULL, true);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to unmarshall dcerpc_auth.\n"));
- goto err;
- }
-
- /* We must NEVER look at auth_info->auth_pad_len here,
- * as old Samba client code gets it wrong and sends it
- * as zero. JRA.
- */
-
- if (auth_info.auth_type != p->auth.auth_type) {
- DEBUG(1, ("Auth type mismatch! Client sent %d, "
- "but auth was started as type %d!\n",
- auth_info.auth_type, p->auth.auth_type));
- goto err;
- }
-
- if (auth_info.auth_level != p->auth.auth_level) {
- DEBUG(1, ("Auth level mismatch! Client sent %d, "
- "but auth was started as level %d!\n",
- auth_info.auth_level, p->auth.auth_level));
- goto err;
- }
-
- if (auth_info.auth_context_id != p->auth.auth_context_id) {
- DEBUG(0, ("Auth context id mismatch! Client sent %u, "
- "but auth was started as level %u!\n",
- (unsigned)auth_info.auth_context_id,
- (unsigned)p->auth.auth_context_id));
- goto err;
- }
-
- gensec_security = p->auth.auth_ctx;
-
- status = auth_generic_server_step(gensec_security,
- pkt, &auth_info.credentials,
- &response);
-
- if (NT_STATUS_EQUAL(status,
- NT_STATUS_MORE_PROCESSING_REQUIRED) ||
- response.length) {
- DEBUG(1, (__location__ ": This was supposed to be the final "
- "leg, but crypto machinery claims a response is "
- "needed, aborting auth!\n"));
- data_blob_free(&response);
- goto err;
- }
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(2, ("Auth failed (%s)\n", nt_errstr(status)));
- goto err;
- }
-
- /* Now verify auth was indeed successful and extract server info */
- status = pipe_auth_verify_final(p);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(2, ("Auth Verify failed (%s)\n", nt_errstr(status)));
- goto err;
- }
-
- return true;
-
-err:
- p->pipe_bound = false;
- p->allow_bind = false;
- p->allow_alter = false;
- p->allow_auth3 = false;
-
- TALLOC_FREE(p->auth.auth_ctx);
- return false;
-}
-
-/****************************************************************************
- Deal with an alter context call. Can be third part of 3 leg auth request for
- SPNEGO calls.
-****************************************************************************/
-
-static bool api_pipe_alter_context(struct pipes_struct *p,
- struct ncacn_packet *pkt)
-{
- struct dcerpc_auth auth_info = {0};
- uint16_t assoc_gid;
- NTSTATUS status;
- union dcerpc_payload u;
- struct dcerpc_ack_ctx alter_ack_ctx;
- DATA_BLOB auth_resp = data_blob_null;
- DATA_BLOB auth_blob = data_blob_null;
- struct gensec_security *gensec_security;
-
- DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
-
- if (!p->allow_alter) {
- DEBUG(1, ("Pipe not in allow alter state.\n"));
- goto err_exit;
- }
-
- status = dcerpc_verify_ncacn_packet_header(pkt,
- DCERPC_PKT_ALTER,
- 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)) {
- DEBUG(1, ("api_pipe_alter_context: invalid pdu: %s\n",
- nt_errstr(status)));
- NDR_PRINT_DEBUG(ncacn_packet, pkt);
- goto err_exit;
- }
-
- if (pkt->u.alter.num_contexts == 0) {
- DEBUG(1, ("api_pipe_alter_context: no rpc contexts around\n"));
- goto err_exit;
- }
-
- if (pkt->u.alter.ctx_list[0].num_transfer_syntaxes == 0) {
- DEBUG(1, ("api_pipe_alter_context: no transfer syntaxes around\n"));
- goto err_exit;
- }
-
- if (pkt->u.alter.assoc_group_id != 0) {
- assoc_gid = pkt->u.alter.assoc_group_id;
- } else {
- assoc_gid = 0x53f0;
- }
-
- /*
- * Create the bind response struct.
- */
-
- /* If the requested abstract synt uuid doesn't match our client pipe,
- reject the alter_ack & set the transfer interface synt to all 0's,
- ver 0 (observed when NT5 attempts to bind to abstract interfaces
- unknown to NT4)
- Needed when adding entries to a DACL from NT5 - SK */
-
- if (check_bind_req(p,
- &pkt->u.alter.ctx_list[0].abstract_syntax,
- &pkt->u.alter.ctx_list[0].transfer_syntaxes[0],
- pkt->u.alter.ctx_list[0].context_id)) {
-
- alter_ack_ctx.result = 0;
- alter_ack_ctx.reason.value = 0;
- alter_ack_ctx.syntax = pkt->u.alter.ctx_list[0].transfer_syntaxes[0];
- } else {
- /* Rejection reason: abstract syntax not supported */
- alter_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
- alter_ack_ctx.reason.value = DCERPC_BIND_REASON_ASYNTAX;
- alter_ack_ctx.syntax = ndr_syntax_id_null;
- }
-
- /*
- * Check if this is an authenticated alter context request.
- */
- if (pkt->auth_length) {
- /* We can only finish if the pipe is unbound for now */
- if (p->pipe_bound) {
- DEBUG(0, (__location__ ": Pipe already bound, "
- "Altering Context not yet supported!\n"));
- goto err_exit;
- }
-
- status = dcerpc_pull_auth_trailer(pkt, pkt,
- &pkt->u.alter.auth_info,
- &auth_info, NULL, true);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
- goto err_exit;
- }
-
- if (auth_info.auth_type != p->auth.auth_type) {
- DEBUG(0, ("Auth type mismatch! Client sent %d, "
- "but auth was started as type %d!\n",
- auth_info.auth_type, p->auth.auth_type));
- goto err_exit;
- }
-
- if (auth_info.auth_level != p->auth.auth_level) {
- DEBUG(0, ("Auth level mismatch! Client sent %d, "
- "but auth was started as level %d!\n",
- auth_info.auth_level, p->auth.auth_level));
- goto err_exit;
- }
-
- if (auth_info.auth_context_id != p->auth.auth_context_id) {
- DEBUG(0, ("Auth context id mismatch! Client sent %u, "
- "but auth was started as level %u!\n",
- (unsigned)auth_info.auth_context_id,
- (unsigned)p->auth.auth_context_id));
- goto err_exit;
- }
-
- gensec_security = p->auth.auth_ctx;
- status = auth_generic_server_step(gensec_security,
- pkt,
- &auth_info.credentials,
- &auth_resp);
- if (NT_STATUS_IS_OK(status)) {
- /* third leg of auth, verify auth info */
- status = pipe_auth_verify_final(p);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Auth Verify failed (%s)\n",
- nt_errstr(status)));
- goto err_exit;
- }
- } else if (NT_STATUS_EQUAL(status,
- NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- DEBUG(10, ("More auth legs required.\n"));
- } else {
- DEBUG(0, ("Auth step returned an error (%s)\n",
- nt_errstr(status)));
- goto err_exit;
- }
- }
-
- ZERO_STRUCT(u.alter_resp);
- u.alter_resp.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
- u.alter_resp.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
- u.alter_resp.assoc_group_id = assoc_gid;
-
- /* secondary address CAN be NULL
- * as the specs say it's ignored.
- * It MUST be NULL to have the spoolss working.
- */
- u.alter_resp.secondary_address = "";
- u.alter_resp.secondary_address_size = 1;
-
- u.alter_resp.num_results = 1;
- u.alter_resp.ctx_list = &alter_ack_ctx;
-
- /* NOTE: We leave the auth_info empty so we can calculate the padding
- * later and then append the auth_info --simo */
-
- /*
- * Marshall directly into the outgoing PDU space. We
- * must do this as we need to set to the bind response
- * header and are never sending more than one PDU here.
- */
-
- status = dcerpc_push_ncacn_packet(p->mem_ctx,
- DCERPC_PKT_ALTER_RESP,
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST,
- auth_resp.length,
- pkt->call_id,
- &u,
- &p->out_data.frag);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to marshall alter_resp packet. (%s)\n",
- nt_errstr(status)));
- goto err_exit;
- }
-
- if (auth_resp.length) {
- status = dcerpc_push_dcerpc_auth(pkt,
- p->auth.auth_type,
- p->auth.auth_level,
- 0, /* pad_len */
- p->auth.auth_context_id,
- &auth_resp,
- &auth_blob);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
- goto err_exit;
- }
- }
-
- /* Now that we have the auth len store it into the right place in
- * the dcerpc header */
- dcerpc_set_frag_length(&p->out_data.frag,
- p->out_data.frag.length +
- auth_blob.length);
-
- if (auth_resp.length) {
- if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
- auth_blob.data, auth_blob.length)) {
- DEBUG(0, ("Append of auth info failed.\n"));
- goto err_exit;
- }
- }
-
- /*
- * Setup the lengths for the initial reply.
- */
-
- p->out_data.data_sent_length = 0;
- p->out_data.current_pdu_sent = 0;
-
- TALLOC_FREE(auth_blob.data);
- return True;
-
- err_exit:
-
- data_blob_free(&p->out_data.frag);
- TALLOC_FREE(auth_blob.data);
- return setup_bind_nak(p, pkt);
-}
-
-static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
- const struct api_struct *api_rpc_cmds, int n_cmds,
- const struct ndr_syntax_id *syntax);
-
-static bool srv_pipe_check_verification_trailer(struct pipes_struct *p,
- struct ncacn_packet *pkt,
- struct pipe_rpc_fns *pipe_fns)
-{
- TALLOC_CTX *frame = talloc_stackframe();
- struct dcerpc_sec_verification_trailer *vt = NULL;
- const uint32_t bitmask1 =
- p->auth.client_hdr_signing ? DCERPC_SEC_VT_CLIENT_SUPPORTS_HEADER_SIGNING : 0;
- const struct dcerpc_sec_vt_pcontext pcontext = {
- .abstract_syntax = pipe_fns->syntax,
- .transfer_syntax = ndr_transfer_syntax_ndr,
- };
- const struct dcerpc_sec_vt_header2 header2 =
- dcerpc_sec_vt_header2_from_ncacn_packet(pkt);
- struct ndr_pull *ndr;
- enum ndr_err_code ndr_err;
- bool ret = false;
-
- ndr = ndr_pull_init_blob(&p->in_data.data, frame);
- if (ndr == NULL) {
- goto done;
- }
-
- ndr_err = ndr_pop_dcerpc_sec_verification_trailer(ndr, frame, &vt);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- goto done;
- }
-
- ret = dcerpc_sec_verification_trailer_check(vt, &bitmask1,
- &pcontext, &header2);
-done:
- TALLOC_FREE(frame);
- return ret;
-}
-
-/****************************************************************************
- Find the correct RPC function to call for this request.
- If the pipe is authenticated then become the correct UNIX user
- before doing the call.
-****************************************************************************/
-
-static bool api_pipe_request(struct pipes_struct *p,
- struct ncacn_packet *pkt)
-{
- TALLOC_CTX *frame = talloc_stackframe();
- bool ret = False;
- struct pipe_rpc_fns *pipe_fns;
- const char *interface_name = NULL;
- const char *dump_dir = NULL;
-
- if (!p->pipe_bound) {
- DEBUG(1, ("Pipe not bound!\n"));
- data_blob_free(&p->out_data.rdata);
- TALLOC_FREE(frame);
- return false;
- }
-
- /* get the set of RPC functions for this context */
- pipe_fns = find_pipe_fns_by_context(p->contexts,
- pkt->u.request.context_id);
- if (pipe_fns == NULL) {
- DEBUG(0, ("No rpc function table associated with context "
- "[%d]\n",
- pkt->u.request.context_id));
- data_blob_free(&p->out_data.rdata);
- TALLOC_FREE(frame);
- return false;
- }
-
- interface_name = ndr_interface_name(&pipe_fns->syntax.uuid,
- pipe_fns->syntax.if_version);
- SMB_ASSERT(interface_name != NULL);
-
- if (p->auth.auth_level < pipe_fns->min_auth_level) {
-
- DEBUG(1, ("%s: auth level required for %s: 0x%x, got: 0x%0x\n",
- __func__, interface_name,
- pipe_fns->min_auth_level,
- p->auth.auth_level));
-
- setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_ACCESS_DENIED));
- TALLOC_FREE(frame);
- return true;
- }
-
- switch (p->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 (!pipe_fns->allow_connect) {
- char *addr;
-
- addr = tsocket_address_string(p->remote_address, frame);
-
- DEBUG(1, ("%s: restrict auth_level_connect access "
- "to [%s] with auth[type=0x%x,level=0x%x] "
- "on [%s] from [%s]\n",
- __func__, interface_name,
- p->auth.auth_type,
- p->auth.auth_level,
- derpc_transport_string_by_transport(p->transport),
- addr));
-
- setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_ACCESS_DENIED));
- TALLOC_FREE(frame);
- return true;
- }
- break;
- }
-
- dump_dir = lp_parm_const_string(0, "dcesrv", "fuzz directory", NULL);
-
- dcerpc_save_ndr_fuzz_seed(p,
- p->in_data.data,
- dump_dir,
- interface_name,
- NDR_IN,
- pkt->u.request.opnum,
- false);
-
- if (!srv_pipe_check_verification_trailer(p, pkt, pipe_fns)) {
- DEBUG(1, ("srv_pipe_check_verification_trailer: failed\n"));
- set_incoming_fault(p);
- setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_ACCESS_DENIED));
- data_blob_free(&p->out_data.rdata);
- TALLOC_FREE(frame);
- return true;
- }
-
- if (!become_authenticated_pipe_user(p->session_info)) {
- DEBUG(1, ("Failed to become pipe user!\n"));
- data_blob_free(&p->out_data.rdata);
- TALLOC_FREE(frame);
- return false;
- }
-
- DEBUG(5, ("Requested %s rpc service\n", interface_name));
-
- ret = api_rpcTNP(p, pkt, pipe_fns->cmds, pipe_fns->n_cmds,
- &pipe_fns->syntax);
- unbecome_authenticated_pipe_user();
-
- dcerpc_save_ndr_fuzz_seed(p,
- p->out_data.rdata,
- dump_dir,
- interface_name,
- NDR_OUT,
- pkt->u.request.opnum,
- false);
-
- TALLOC_FREE(frame);
- return ret;
-}
-
-/*******************************************************************
- Calls the underlying RPC function for a named pipe.
- ********************************************************************/
-
-static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
- const struct api_struct *api_rpc_cmds, int n_cmds,
- const struct ndr_syntax_id *syntax)
-{
- int fn_num;
- uint32_t offset1;
- const struct ndr_interface_table *table;
-
- /* interpret the command */
- DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
- ndr_interface_name(&syntax->uuid, syntax->if_version),
- pkt->u.request.opnum));
-
- table = ndr_table_by_uuid(&syntax->uuid);
- if (table == NULL) {
- DEBUG(0,("unknown interface\n"));
- return false;
- }
-
- if (DEBUGLEVEL >= 50) {
- fstring name;
- slprintf(name, sizeof(name)-1, "in_%s",
- dcerpc_default_transport_endpoint(pkt, NCACN_NP, table));
- dump_pdu_region(name, pkt->u.request.opnum,
- &p->in_data.data, 0,
- p->in_data.data.length);
- }
-
- for (fn_num = 0; fn_num < n_cmds; fn_num++) {
- if (api_rpc_cmds[fn_num].opnum == pkt->u.request.opnum &&
- api_rpc_cmds[fn_num].fn != NULL) {
- DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
- api_rpc_cmds[fn_num].name));
- break;
- }
- }
-
- if (fn_num == n_cmds) {
- /*
- * For an unknown RPC just return a fault PDU but
- * return True to allow RPC's on the pipe to continue
- * and not put the pipe into fault state. JRA.
- */
- DEBUG(4, ("unknown\n"));
- setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
- return True;
- }
-
- offset1 = p->out_data.rdata.length;
-
- DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
- fn_num, api_rpc_cmds[fn_num].fn));
- /* do the actual command */
- if(!api_rpc_cmds[fn_num].fn(p)) {
- DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
- ndr_interface_name(&syntax->uuid, syntax->if_version),
- api_rpc_cmds[fn_num].name));
- data_blob_free(&p->out_data.rdata);
- return False;
- }
-
- if (p->fault_state) {
- DEBUG(4,("api_rpcTNP: fault(%d) return.\n", p->fault_state));
- setup_fault_pdu(p, NT_STATUS(p->fault_state));
- p->fault_state = 0;
- return true;
- }
-
- if (DEBUGLEVEL >= 50) {
- fstring name;
- slprintf(name, sizeof(name)-1, "out_%s",
- dcerpc_default_transport_endpoint(pkt, NCACN_NP, table));
- dump_pdu_region(name, pkt->u.request.opnum,
- &p->out_data.rdata, offset1,
- p->out_data.rdata.length);
- }
-
- DEBUG(5,("api_rpcTNP: called %s successfully\n",
- ndr_interface_name(&syntax->uuid, syntax->if_version)));
-
- /* Check for buffer underflow in rpc parsing */
- if ((DEBUGLEVEL >= 10) &&
- (pkt->frag_length < p->in_data.data.length)) {
- DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
- dump_data(10, p->in_data.data.data + pkt->frag_length,
- p->in_data.data.length - pkt->frag_length);
- }
-
- return True;
-}
-
-/****************************************************************************
- Initialise an outgoing packet.
-****************************************************************************/
-
-static bool pipe_init_outgoing_data(struct pipes_struct *p)
-{
- output_data *o_data = &p->out_data;
-
- /* Reset the offset counters. */
- o_data->data_sent_length = 0;
- o_data->current_pdu_sent = 0;
-
- data_blob_free(&o_data->frag);
-
- /* Free any memory in the current return data buffer. */
- data_blob_free(&o_data->rdata);
-
- return True;
-}
-
-/****************************************************************************
- Sets the fault state on incoming packets.
-****************************************************************************/
-
-void set_incoming_fault(struct pipes_struct *p)
-{
- data_blob_free(&p->in_data.data);
- p->in_data.pdu_needed_len = 0;
- p->in_data.pdu.length = 0;
- p->fault_state = DCERPC_NCA_S_PROTO_ERROR;
-
- p->allow_alter = false;
- p->allow_auth3 = false;
- p->pipe_bound = false;
-
- DEBUG(10, ("Setting fault state\n"));
-}
-
-static NTSTATUS dcesrv_auth_request(struct pipe_auth_data *auth,
- struct ncacn_packet *pkt,
- DATA_BLOB *raw_pkt)
-{
- NTSTATUS status;
- size_t hdr_size = DCERPC_REQUEST_LENGTH;
-
- DEBUG(10, ("Checking request auth.\n"));
-
- if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
- hdr_size += 16;
- }
-
- /* in case of sealing this function will unseal the data in place */
- status = dcerpc_check_auth(auth, pkt,
- &pkt->u.request.stub_and_verifier,
- hdr_size, raw_pkt);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- return NT_STATUS_OK;
-}
-
-/****************************************************************************
- Processes a request pdu. This will do auth processing if needed, and
- appends the data into the complete stream if the LAST flag is not set.
-****************************************************************************/
-
-static bool process_request_pdu(struct pipes_struct *p, struct ncacn_packet *pkt)
-{
- NTSTATUS status;
- DATA_BLOB data;
- struct dcerpc_sec_vt_header2 hdr2;
-
- if (!p->pipe_bound) {
- DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
- set_incoming_fault(p);
- return False;
- }
-
- /*
- * We don't ignore DCERPC_PFC_FLAG_PENDING_CANCEL.
- * TODO: we can reject it with DCERPC_FAULT_NO_CALL_ACTIVE later.
- */
- status = dcerpc_verify_ncacn_packet_header(pkt,
- DCERPC_PKT_REQUEST,
- pkt->u.request.stub_and_verifier.length,
- 0, /* required_flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- 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)) {
- DEBUG(1, ("process_request_pdu: invalid pdu: %s\n",
- nt_errstr(status)));
- NDR_PRINT_DEBUG(ncacn_packet, pkt);
- set_incoming_fault(p);
- return false;
- }
-
- hdr2 = dcerpc_sec_vt_header2_from_ncacn_packet(pkt);
- if (pkt->pfc_flags & DCERPC_PFC_FLAG_FIRST) {
- p->header2 = hdr2;
- } else {
- if (!dcerpc_sec_vt_header2_equal(&hdr2, &p->header2)) {
- set_incoming_fault(p);
- return false;
- }
- }
-
- /* Store the opnum */
- p->opnum = pkt->u.request.opnum;
-
- status = dcesrv_auth_request(&p->auth, pkt, &p->in_data.pdu);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to check packet auth. (%s)\n",
- nt_errstr(status)));
- set_incoming_fault(p);
- return false;
- }
-
- data = pkt->u.request.stub_and_verifier;
-
- /*
- * Check the data length doesn't go over the 15Mb limit.
- * increased after observing a bug in the Windows NT 4.0 SP6a
- * spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
- * will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
- */
-
- if (p->in_data.data.length + data.length > MAX_RPC_DATA_SIZE) {
- DEBUG(0, ("process_request_pdu: "
- "rpc data buffer too large (%u) + (%u)\n",
- (unsigned int)p->in_data.data.length,
- (unsigned int)data.length));
- set_incoming_fault(p);
- return False;
- }
-
- /*
- * Append the data portion into the buffer and return.
- */
-
- if (data.length) {
- if (!data_blob_append(p->mem_ctx, &p->in_data.data,
- data.data, data.length)) {
- DEBUG(0, ("Unable to append data size %u "
- "to parse buffer of size %u.\n",
- (unsigned int)data.length,
- (unsigned int)p->in_data.data.length));
- set_incoming_fault(p);
- return False;
- }
- }
-
- if (!(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) {
- return true;
- }
-
- /*
- * Ok - we finally have a complete RPC stream.
- * Call the rpc command to process it.
- */
-
- return api_pipe_request(p, pkt);
-}
-
-void process_complete_pdu(struct pipes_struct *p, struct ncacn_packet *pkt)
-{
- bool reply = false;
-
- /* Store the call_id */
- p->call_id = pkt->call_id;
-
- DEBUG(10, ("Processing packet type %u\n", (unsigned int)pkt->ptype));
-
- if (!pipe_init_outgoing_data(p)) {
- goto done;
- }
-
- switch (pkt->ptype) {
- case DCERPC_PKT_REQUEST:
- reply = process_request_pdu(p, pkt);
- break;
-
- case DCERPC_PKT_PING: /* CL request - ignore... */
- DEBUG(0, ("Error - Connectionless packet type %u received\n",
- (unsigned int)pkt->ptype));
- break;
-
- case DCERPC_PKT_RESPONSE: /* No responses here. */
- DEBUG(0, ("Error - DCERPC_PKT_RESPONSE received from client"));
- break;
-
- case DCERPC_PKT_FAULT:
- case DCERPC_PKT_WORKING:
- /* CL request - reply to a ping when a call in process. */
- case DCERPC_PKT_NOCALL:
- /* CL - server reply to a ping call. */
- case DCERPC_PKT_REJECT:
- case DCERPC_PKT_ACK:
- case DCERPC_PKT_CL_CANCEL:
- case DCERPC_PKT_FACK:
- case DCERPC_PKT_CANCEL_ACK:
- DEBUG(0, ("Error - Connectionless packet type %u received\n",
- (unsigned int)pkt->ptype));
- break;
-
- case DCERPC_PKT_BIND:
- /*
- * We assume that a pipe bind is only in one pdu.
- */
- reply = api_pipe_bind_req(p, pkt);
- break;
-
- case DCERPC_PKT_BIND_ACK:
- case DCERPC_PKT_BIND_NAK:
- DEBUG(0, ("Error - DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
- "packet type %u received.\n",
- (unsigned int)pkt->ptype));
- break;
-
-
- case DCERPC_PKT_ALTER:
- /*
- * We assume that a pipe bind is only in one pdu.
- */
- reply = api_pipe_alter_context(p, pkt);
- break;
-
- case DCERPC_PKT_ALTER_RESP:
- DEBUG(0, ("Error - DCERPC_PKT_ALTER_RESP received: "
- "Should only be server -> client.\n"));
- break;
-
- case DCERPC_PKT_AUTH3:
- /*
- * The third packet in an auth exchange.
- */
- reply = api_pipe_bind_auth3(p, pkt);
- break;
-
- case DCERPC_PKT_SHUTDOWN:
- DEBUG(0, ("Error - DCERPC_PKT_SHUTDOWN received: "
- "Should only be server -> client.\n"));
- break;
-
- case DCERPC_PKT_CO_CANCEL:
- /* For now just free all client data and continue
- * processing. */
- DEBUG(3,("process_complete_pdu: DCERPC_PKT_CO_CANCEL."
- " Abandoning rpc call.\n"));
- /* As we never do asynchronous RPC serving, we can
- * never cancel a call (as far as I know).
- * If we ever did we'd have to send a cancel_ack reply.
- * For now, just free all client data and continue
- * processing. */
- reply = True;
- break;
-
-#if 0
- /* Enable this if we're doing async rpc. */
- /* We must check the outstanding callid matches. */
- if (pipe_init_outgoing_data(p)) {
- /* Send a cancel_ack PDU reply. */
- /* We should probably check the auth-verifier here. */
- reply = setup_cancel_ack_reply(p, pkt);
- }
- break;
-#endif
-
- case DCERPC_PKT_ORPHANED:
- /* We should probably check the auth-verifier here.
- * For now just free all client data and continue
- * processing. */
- DEBUG(3, ("process_complete_pdu: DCERPC_PKT_ORPHANED."
- " Abandoning rpc call.\n"));
- reply = True;
- break;
-
- default:
- DEBUG(0, ("process_complete_pdu: "
- "Unknown rpc type = %u received.\n",
- (unsigned int)pkt->ptype));
- break;
- }
-
-done:
- if (!reply) {
- DBG_NOTICE("DCE/RPC fault sent!\n");
- set_incoming_fault(p);
- setup_fault_pdu(p, NT_STATUS(DCERPC_NCA_S_PROTO_ERROR));
- }
- /* pkt and p->in_data.pdu.data freed by caller */
-}
-
git.samba.org / samba.git / blobdiff