/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
- * Almost completely rewritten by (C) Jeremy Allison 2005.
+ * Almost completely rewritten by (C) Jeremy Allison 2005 - 2010
*
* 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
*/
#include "includes.h"
-#include "../libcli/auth/libcli_auth.h"
+#include "srv_pipe_internal.h"
#include "../librpc/gen_ndr/ndr_schannel.h"
-
-extern struct current_user current_user;
+#include "../libcli/auth/schannel.h"
+#include "../libcli/auth/spnego.h"
+#include "dcesrv_ntlmssp.h"
+#include "dcesrv_gssapi.h"
+#include "dcesrv_spnego.h"
+#include "rpc_server.h"
+#include "rpc_dce.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
-static void free_pipe_ntlmssp_auth_data(struct pipe_auth_data *auth)
+/**
+ * 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)
{
- AUTH_NTLMSSP_STATE *a = auth->a_u.auth_ntlmssp_state;
-
- if (a) {
- auth_ntlmssp_end(&a);
+ 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));
+ }
}
- auth->a_u.auth_ntlmssp_state = NULL;
+ TALLOC_FREE(fname);
}
-static DATA_BLOB generic_session_key(void)
+static void free_pipe_ntlmssp_auth_data(struct pipe_auth_data *auth)
{
- return data_blob("SystemLibraryDTC", 16);
+ TALLOC_FREE(auth->a_u.auth_ntlmssp_state);
}
-/*******************************************************************
- Generate the next PDU to be returned from the data in p->rdata.
- Handle NTLMSSP.
- ********************************************************************/
-
-static bool create_next_pdu_ntlmssp(pipes_struct *p)
+static void free_pipe_schannel_auth_data(struct pipe_auth_data *auth)
{
- RPC_HDR_RESP hdr_resp;
- uint32 ss_padding_len = 0;
- uint32 data_space_available;
- uint32 data_len_left;
- uint32 data_len;
- NTSTATUS status;
- DATA_BLOB auth_blob;
- RPC_HDR_AUTH auth_info;
- uint8 auth_type, auth_level;
- AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
-
- /*
- * 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(DCERPC_FAULT_OP_RNG_ERROR));
- return True;
- }
-
- memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
-
- /* Change the incoming request header to a response. */
- p->hdr.pkt_type = RPC_RESPONSE;
-
- /* Set up rpc header flags. */
- if (p->out_data.data_sent_length == 0) {
- p->hdr.flags = RPC_FLG_FIRST;
- } else {
- p->hdr.flags = 0;
- }
-
- /*
- * Work out how much we can fit in a single PDU.
- */
-
- data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
-
- /*
- * Ensure there really is data left to send.
- */
-
- if(!data_len_left) {
- DEBUG(0,("create_next_pdu_ntlmssp: no data left to send !\n"));
- return False;
- }
-
- data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
- - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - NTLMSSP_SIG_SIZE;
-
- /*
- * The amount we send is the minimum of the available
- * space and the amount left to send.
- */
-
- data_len = MIN(data_len_left, data_space_available);
-
- /*
- * Set up the alloc hint. This should be the data left to
- * send.
- */
-
- hdr_resp.alloc_hint = data_len_left;
-
- /*
- * Work out if this PDU will be the last.
- */
-
- if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
- p->hdr.flags |= RPC_FLG_LAST;
- if (data_len_left % 8) {
- ss_padding_len = 8 - (data_len_left % 8);
- DEBUG(10,("create_next_pdu_ntlmssp: adding sign/seal padding of %u\n",
- ss_padding_len ));
- }
- }
-
- /*
- * Set up the header lengths.
- */
-
- p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN +
- data_len + ss_padding_len +
- RPC_HDR_AUTH_LEN + NTLMSSP_SIG_SIZE;
- p->hdr.auth_len = NTLMSSP_SIG_SIZE;
-
-
- /*
- * Init the parse struct to point at the outgoing
- * data.
- */
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
-
- /* Store the header in the data stream. */
- if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_RESP.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- /* Copy the data into the PDU. */
-
- if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
- p->out_data.data_sent_length, data_len)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to copy %u bytes of data.\n", (unsigned int)data_len));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- /* Copy the sign/seal padding data. */
- if (ss_padding_len) {
- char pad[8];
-
- memset(pad, '\0', 8);
- if (!prs_copy_data_in(&p->out_data.frag, pad,
- ss_padding_len)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes of pad data.\n",
- (unsigned int)ss_padding_len));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
- }
-
-
- /* Now write out the auth header and null blob. */
- if (p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) {
- auth_type = RPC_NTLMSSP_AUTH_TYPE;
- } else {
- auth_type = RPC_SPNEGO_AUTH_TYPE;
- }
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
- auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
- } else {
- auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
- }
-
- init_rpc_hdr_auth(&auth_info, auth_type, auth_level, ss_padding_len, 1 /* context id. */);
- if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, &p->out_data.frag,
- 0)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_AUTH.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
+ TALLOC_FREE(auth->a_u.schannel_auth);
+}
- /* Generate the sign blob. */
+static void free_pipe_gssapi_auth_data(struct pipe_auth_data *auth)
+{
+ TALLOC_FREE(auth->a_u.gssapi_state);
+}
- switch (p->auth.auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- /* Data portion is encrypted. */
- status = ntlmssp_seal_packet(
- a->ntlmssp_state,
- (uint8_t *)prs_data_p(&p->out_data.frag)
- + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
- data_len + ss_padding_len,
- (unsigned char *)prs_data_p(&p->out_data.frag),
- (size_t)prs_offset(&p->out_data.frag),
- &auth_blob);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(&auth_blob);
- prs_mem_free(&p->out_data.frag);
- return False;
- }
- break;
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- /* Data is signed. */
- status = ntlmssp_sign_packet(
- a->ntlmssp_state,
- (unsigned char *)prs_data_p(&p->out_data.frag)
- + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
- data_len + ss_padding_len,
- (unsigned char *)prs_data_p(&p->out_data.frag),
- (size_t)prs_offset(&p->out_data.frag),
- &auth_blob);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(&auth_blob);
- prs_mem_free(&p->out_data.frag);
- return False;
- }
- break;
- default:
- prs_mem_free(&p->out_data.frag);
- return False;
- }
+static void free_pipe_spnego_auth_data(struct pipe_auth_data *auth)
+{
+ TALLOC_FREE(auth->a_u.spnego_state);
+}
- /* Append the auth blob. */
- if (!prs_copy_data_in(&p->out_data.frag, (char *)auth_blob.data,
- NTLMSSP_SIG_SIZE)) {
- DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes auth blob.\n",
- (unsigned int)NTLMSSP_SIG_SIZE));
- data_blob_free(&auth_blob);
- prs_mem_free(&p->out_data.frag);
- return False;
+static void free_pipe_auth_data(struct pipe_auth_data *auth)
+{
+ if (auth->auth_data_free_func) {
+ (*auth->auth_data_free_func)(auth);
+ auth->auth_data_free_func = NULL;
}
+}
- data_blob_free(&auth_blob);
-
- /*
- * Setup the counts for this PDU.
- */
-
- p->out_data.data_sent_length += data_len;
- p->out_data.current_pdu_sent = 0;
-
- return True;
+static DATA_BLOB generic_session_key(void)
+{
+ return data_blob("SystemLibraryDTC", 16);
}
/*******************************************************************
- Generate the next PDU to be returned from the data in p->rdata.
- Return an schannel authenticated fragment.
- ********************************************************************/
+ Generate the next PDU to be returned from the data.
+********************************************************************/
-static bool create_next_pdu_schannel(pipes_struct *p)
+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)
{
- RPC_HDR_RESP hdr_resp;
- uint32 ss_padding_len = 0;
- uint32 data_len;
- uint32 data_space_available;
- uint32 data_len_left;
- uint32 data_pos;
-
- /*
- * 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(DCERPC_FAULT_OP_RNG_ERROR));
- return True;
- }
-
- memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
+ 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;
- /* Change the incoming request header to a response. */
- p->hdr.pkt_type = RPC_RESPONSE;
+ ZERO_STRUCT(u.response);
- /* Set up rpc header flags. */
- if (p->out_data.data_sent_length == 0) {
- p->hdr.flags = RPC_FLG_FIRST;
+ /* Set up rpc packet pfc flags. */
+ if (data_sent_length == 0) {
+ pfc_flags = DCERPC_PFC_FLAG_FIRST;
} else {
- p->hdr.flags = 0;
+ pfc_flags = 0;
}
- /*
- * Work out how much we can fit in a single PDU.
- */
-
- data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
+ /* 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_len_left) {
- DEBUG(0,("create_next_pdu_schannel: no data left to send !\n"));
- return False;
+ /* 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;
}
- data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
- - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN
- - RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
-
- /*
- * The amount we send is the minimum of the available
- * space and the amount left to send.
- */
-
- data_len = MIN(data_len_left, data_space_available);
-
- /*
- * Set up the alloc hint. This should be the data left to
- * send.
- */
-
- hdr_resp.alloc_hint = data_len_left;
-
- /*
- * Work out if this PDU will be the last.
- */
-
- if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
- p->hdr.flags |= RPC_FLG_LAST;
- if (data_len_left % 8) {
- ss_padding_len = 8 - (data_len_left % 8);
- DEBUG(10,("create_next_pdu_schannel: adding sign/seal padding of %u\n",
- ss_padding_len ));
- }
+ status = dcerpc_guess_sizes(auth,
+ DCERPC_RESPONSE_LENGTH,
+ data_left,
+ RPC_MAX_PDU_FRAG_LEN,
+ SERVER_NDR_PADDING_SIZE,
+ &data_to_send, &frag_len,
+ &auth_len, &pad_len);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
- p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len + ss_padding_len +
- RPC_HDR_AUTH_LEN + RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
- p->hdr.auth_len = RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
-
- /*
- * Init the parse struct to point at the outgoing
- * data.
- */
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
+ /* Set up the alloc hint. This should be the data left to send. */
+ u.response.alloc_hint = data_left;
- /* Store the header in the data stream. */
- if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_RESP.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
+ /* Work out if this PDU will be the last. */
+ if (data_sent_length + data_to_send >= rdata->length) {
+ pfc_flags |= DCERPC_PFC_FLAG_LAST;
}
- /* Store the current offset. */
- data_pos = prs_offset(&p->out_data.frag);
+ /* Prepare data to be NDR encoded. */
+ u.response.stub_and_verifier =
+ data_blob_const(rdata->data + data_sent_length, data_to_send);
- /* Copy the data into the PDU. */
-
- if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
- p->out_data.data_sent_length, data_len)) {
- DEBUG(0,("create_next_pdu_schannel: failed to copy %u bytes of data.\n", (unsigned int)data_len));
- prs_mem_free(&p->out_data.frag);
- return False;
+ /* 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;
}
- /* Copy the sign/seal padding data. */
- if (ss_padding_len) {
- char pad[8];
- memset(pad, '\0', 8);
- if (!prs_copy_data_in(&p->out_data.frag, pad,
- ss_padding_len)) {
- DEBUG(0,("create_next_pdu_schannel: failed to add %u bytes of pad data.\n", (unsigned int)ss_padding_len));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
+ 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);
}
- {
- /*
- * Schannel processing.
- */
- RPC_HDR_AUTH auth_info;
- struct NL_AUTH_SIGNATURE verf;
- DATA_BLOB blob;
- enum ndr_err_code ndr_err;
-
- /* Check it's the type of reply we were expecting to decode */
-
- init_rpc_hdr_auth(&auth_info,
- RPC_SCHANNEL_AUTH_TYPE,
- p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY ?
- DCERPC_AUTH_LEVEL_PRIVACY : DCERPC_AUTH_LEVEL_INTEGRITY,
- ss_padding_len, 1);
-
- if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info,
- &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_AUTH.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- schannel_encode(p->auth.a_u.schannel_auth,
- p->auth.auth_level, SENDER_IS_ACCEPTOR, &verf,
- prs_data_p(&p->out_data.frag) + data_pos,
- data_len + ss_padding_len);
-
- /* Finally marshall the blob. */
-
- ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), NULL, &verf,
- (ndr_push_flags_fn_t)ndr_push_NL_AUTH_SIGNATURE);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- prs_mem_free(&p->out_data.frag);
- return false;
- }
-
- if (DEBUGLEVEL >= 10) {
- NDR_PRINT_DEBUG(NL_AUTH_SIGNATURE, &verf);
- }
-
- if (!prs_copy_data_in(&p->out_data.frag, (const char *)blob.data, blob.length)) {
- prs_mem_free(&p->out_data.frag);
- return false;
+ if (auth_len) {
+ status = dcerpc_add_auth_footer(auth, pad_len, frag);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(frag);
+ return status;
}
-
- p->auth.a_u.schannel_auth->seq_num++;
}
- /*
- * Setup the counts for this PDU.
- */
-
- p->out_data.data_sent_length += data_len;
- p->out_data.current_pdu_sent = 0;
-
- return True;
+ *pdu_size = data_to_send;
+ return NT_STATUS_OK;
}
/*******************************************************************
Generate the next PDU to be returned from the data in p->rdata.
- No authentication done.
********************************************************************/
-static bool create_next_pdu_noauth(pipes_struct *p)
+bool create_next_pdu(struct pipes_struct *p)
{
- RPC_HDR_RESP hdr_resp;
- uint32 data_len;
- uint32 data_space_available;
- uint32 data_len_left;
+ 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) {
+ if (p->fault_state) {
setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
- return True;
- }
-
- memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
-
- /* Change the incoming request header to a response. */
- p->hdr.pkt_type = RPC_RESPONSE;
-
- /* Set up rpc header flags. */
- if (p->out_data.data_sent_length == 0) {
- p->hdr.flags = RPC_FLG_FIRST;
- } else {
- p->hdr.flags = 0;
- }
-
- /*
- * Work out how much we can fit in a single PDU.
- */
-
- data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
-
- /*
- * Ensure there really is data left to send.
- */
-
- if(!data_len_left) {
- DEBUG(0,("create_next_pdu_noath: no data left to send !\n"));
- return False;
- }
-
- data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
- - RPC_HDR_RESP_LEN;
-
- /*
- * The amount we send is the minimum of the available
- * space and the amount left to send.
- */
-
- data_len = MIN(data_len_left, data_space_available);
-
- /*
- * Set up the alloc hint. This should be the data left to
- * send.
- */
-
- hdr_resp.alloc_hint = data_len_left;
-
- /*
- * Work out if this PDU will be the last.
- */
-
- if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
- p->hdr.flags |= RPC_FLG_LAST;
- }
-
- /*
- * Set up the header lengths.
- */
-
- p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len;
- p->hdr.auth_len = 0;
-
- /*
- * Init the parse struct to point at the outgoing
- * data.
- */
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
-
- /* Store the header in the data stream. */
- if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_noath: failed to marshall RPC_HDR.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
- DEBUG(0,("create_next_pdu_noath: failed to marshall RPC_HDR_RESP.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
+ return true;
}
- /* Copy the data into the PDU. */
-
- if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
- p->out_data.data_sent_length, data_len)) {
- DEBUG(0,("create_next_pdu_noauth: failed to copy %u bytes of data.\n", (unsigned int)data_len));
- prs_mem_free(&p->out_data.frag);
- return False;
+ 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 += data_len;
+ /* Setup the counts for this PDU. */
+ p->out_data.data_sent_length += pdu_size;
p->out_data.current_pdu_sent = 0;
-
- return True;
-}
-
-/*******************************************************************
- Generate the next PDU to be returned from the data in p->rdata.
-********************************************************************/
-
-bool create_next_pdu(pipes_struct *p)
-{
- switch(p->auth.auth_level) {
- case DCERPC_AUTH_LEVEL_NONE:
- case DCERPC_AUTH_LEVEL_CONNECT:
- /* This is incorrect for auth level connect. Fixme. JRA */
- return create_next_pdu_noauth(p);
-
- default:
- switch(p->auth.auth_type) {
- case PIPE_AUTH_TYPE_NTLMSSP:
- case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
- return create_next_pdu_ntlmssp(p);
- case PIPE_AUTH_TYPE_SCHANNEL:
- return create_next_pdu_schannel(p);
- default:
- break;
- }
- }
-
- DEBUG(0,("create_next_pdu: invalid internal auth level %u / type %u",
- (unsigned int)p->auth.auth_level,
- (unsigned int)p->auth.auth_type));
- return False;
+ return true;
}
/*******************************************************************
the pipe struct.
*******************************************************************/
-static bool pipe_ntlmssp_verify_final(pipes_struct *p, DATA_BLOB *p_resp_blob)
+static bool pipe_ntlmssp_verify_final(TALLOC_CTX *mem_ctx,
+ struct auth_ntlmssp_state *ntlmssp_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ struct client_address *client_id,
+ struct ndr_syntax_id *syntax,
+ struct auth_serversupplied_info **server_info)
{
- DATA_BLOB session_key, reply;
+ DATA_BLOB session_key;
NTSTATUS status;
- AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
bool ret;
- DEBUG(5,("pipe_ntlmssp_verify_final: pipe %s checking user details\n",
- get_pipe_name_from_iface(&p->syntax)));
-
- ZERO_STRUCT(reply);
-
- /* this has to be done as root in order to verify the password */
- become_root();
- status = auth_ntlmssp_update(a, *p_resp_blob, &reply);
- unbecome_root();
-
- /* Don't generate a reply. */
- data_blob_free(&reply);
-
- if (!NT_STATUS_IS_OK(status)) {
- return False;
- }
-
+ DEBUG(5, (__location__ ": pipe %s checking user details\n",
+ get_pipe_name_from_syntax(talloc_tos(), syntax)));
+
/* 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. */
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_INTEGRITY) {
- if (!(a->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
- DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet integrity requested "
- "but client declined signing.\n",
- get_pipe_name_from_iface(&p->syntax)));
- return False;
- }
- }
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
- if (!(a->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
- DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet privacy requested "
- "but client declined sealing.\n",
- get_pipe_name_from_iface(&p->syntax)));
- return False;
- }
+ status = ntlmssp_server_check_flags(ntlmssp_ctx,
+ (auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY));
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, (__location__ ": Client failed to negotatie proper "
+ "security for pipe %s\n",
+ get_pipe_name_from_syntax(talloc_tos(), syntax)));
+ return false;
}
- DEBUG(5, ("pipe_ntlmssp_verify_final: OK: user: %s domain: %s "
- "workstation: %s\n", a->ntlmssp_state->user,
- a->ntlmssp_state->domain, a->ntlmssp_state->workstation));
+ TALLOC_FREE(*server_info);
- if (a->server_info->ptok == NULL) {
- DEBUG(1,("Error: Authmodule failed to provide nt_user_token\n"));
- return False;
+ status = ntlmssp_server_get_user_info(ntlmssp_ctx,
+ mem_ctx, server_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;
}
- TALLOC_FREE(p->server_info);
-
- p->server_info = copy_serverinfo(p, a->server_info);
- if (p->server_info == NULL) {
- DEBUG(0, ("copy_serverinfo failed\n"));
+ if ((*server_info)->ptok == NULL) {
+ DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
return false;
}
session_key = generic_session_key();
if (session_key.data == NULL) {
- return False;
+ return false;
}
- ret = server_info_set_session_key(p->server_info, session_key);
-
+ ret = server_info_set_session_key((*server_info), session_key);
data_blob_free(&session_key);
+ if (!ret) {
+ DEBUG(0, ("Failed to set session key!\n"));
+ return false;
+ }
- return True;
+ return true;
}
-/*******************************************************************
- The switch table for the pipe names and the functions to handle them.
-*******************************************************************/
+static NTSTATUS pipe_gssapi_verify_final(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ struct client_address *client_id,
+ struct auth_serversupplied_info **server_info);
-struct rpc_table {
- struct {
- const char *clnt;
- const char *srv;
- } pipe;
- struct ndr_syntax_id rpc_interface;
- const struct api_struct *cmds;
- int n_cmds;
-};
-
-static struct rpc_table *rpc_lookup;
-static int rpc_lookup_size;
+static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p);
/*******************************************************************
- This is the "stage3" NTLMSSP response after a bind request and reply.
+ This is the "stage3" response after a bind request and reply.
*******************************************************************/
-bool api_pipe_bind_auth3(pipes_struct *p, prs_struct *rpc_in_p)
+bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
{
- RPC_HDR_AUTH auth_info;
- uint32 pad = 0;
- DATA_BLOB blob;
-
- ZERO_STRUCT(blob);
+ struct dcerpc_auth auth_info;
+ DATA_BLOB response = data_blob_null;
+ NTSTATUS status;
- DEBUG(5,("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
+ DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
- if (p->hdr.auth_len == 0) {
- DEBUG(0,("api_pipe_bind_auth3: No auth field sent !\n"));
+ if (pkt->auth_length == 0) {
+ DEBUG(0, ("No auth field sent for bind request!\n"));
goto err;
}
- /* 4 bytes padding. */
- if (!prs_uint32("pad", rpc_in_p, 0, &pad)) {
- DEBUG(0,("api_pipe_bind_auth3: unmarshall of 4 byte pad failed.\n"));
+ /* Ensure there's enough data for an authenticated request. */
+ if (pkt->frag_length < RPC_HEADER_LEN
+ + DCERPC_AUTH_TRAILER_LENGTH
+ + pkt->auth_length) {
+ DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
+ "%u is too large.\n",
+ (unsigned int)pkt->auth_length));
goto err;
}
* Decode the authentication verifier response.
*/
- if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
- DEBUG(0,("api_pipe_bind_auth3: unmarshall of RPC_HDR_AUTH failed.\n"));
+ status = dcerpc_pull_dcerpc_auth(pkt,
+ &pkt->u.auth3.auth_info,
+ &auth_info, p->endian);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
goto err;
}
- if (auth_info.auth_type != RPC_NTLMSSP_AUTH_TYPE) {
- DEBUG(0,("api_pipe_bind_auth3: incorrect auth type (%u).\n",
- (unsigned int)auth_info.auth_type ));
- return False;
+ /* 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.
+ */
+
+ switch (auth_info.auth_type) {
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ status = ntlmssp_server_step(p->auth.a_u.auth_ntlmssp_state,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ status = gssapi_server_step(p->auth.a_u.gssapi_state,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ status = spnego_server_step(p->auth.a_u.spnego_state,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
+ (unsigned int)auth_info.auth_type));
+ return false;
}
- blob = data_blob(NULL,p->hdr.auth_len);
-
- if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
- DEBUG(0,("api_pipe_bind_auth3: Failed to pull %u bytes - the response blob.\n",
- (unsigned int)p->hdr.auth_len ));
+ if (NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED) ||
+ response.length) {
+ DEBUG(0, (__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(0, ("Auth failed (%s)\n", nt_errstr(status)));
goto err;
}
- /*
- * The following call actually checks the challenge/response data.
- * for correctness against the given DOMAIN\user name.
- */
-
- if (!pipe_ntlmssp_verify_final(p, &blob)) {
+ /* Now verify auth was indeed successful and extract server 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;
}
- data_blob_free(&blob);
+ return true;
- p->pipe_bound = True;
+err:
- return True;
+ free_pipe_auth_data(&p->auth);
+ return false;
+}
+
+
+static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p)
+{
+ enum spnego_mech auth_type;
+ struct auth_ntlmssp_state *ntlmssp_ctx;
+ struct gse_context *gse_ctx;
+ void *mech_ctx;
+ NTSTATUS status;
- err:
+ switch (p->auth.auth_type) {
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ if (!pipe_ntlmssp_verify_final(p,
+ p->auth.a_u.auth_ntlmssp_state,
+ p->auth.auth_level,
+ p->client_id, &p->syntax,
+ &p->server_info)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ status = pipe_gssapi_verify_final(p,
+ p->auth.a_u.gssapi_state,
+ p->client_id,
+ &p->server_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("gssapi bind failed with: %s",
+ nt_errstr(status)));
+ return status;
+ }
+ break;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ status = spnego_get_negotiated_mech(p->auth.a_u.spnego_state,
+ &auth_type, &mech_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Bad SPNEGO state (%s)\n",
+ nt_errstr(status)));
+ return status;
+ }
+ switch(auth_type) {
+ case SPNEGO_KRB5:
+ gse_ctx = talloc_get_type_abort(mech_ctx,
+ struct gse_context);
+ status = pipe_gssapi_verify_final(p, gse_ctx,
+ p->client_id,
+ &p->server_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("gssapi bind failed with: %s",
+ nt_errstr(status)));
+ return status;
+ }
+ break;
+ case SPNEGO_NTLMSSP:
+ ntlmssp_ctx = talloc_get_type_abort(mech_ctx,
+ struct auth_ntlmssp_state);
+ if (!pipe_ntlmssp_verify_final(p, ntlmssp_ctx,
+ p->auth.auth_level,
+ p->client_id,
+ &p->syntax,
+ &p->server_info)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect spnego type "
+ "(%d).\n", auth_type));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
+ (unsigned int)p->auth.auth_type));
+ return NT_STATUS_ACCESS_DENIED;
+ }
- data_blob_free(&blob);
- free_pipe_ntlmssp_auth_data(&p->auth);
- p->auth.a_u.auth_ntlmssp_state = NULL;
+ p->pipe_bound = true;
- return False;
+ return NT_STATUS_OK;
}
+static bool pipe_init_outgoing_data(struct pipes_struct *p);
+
/*******************************************************************
Marshall a bind_nak pdu.
*******************************************************************/
-static bool setup_bind_nak(pipes_struct *p)
+static bool setup_bind_nak(struct pipes_struct *p, struct ncacn_packet *pkt)
{
- RPC_HDR nak_hdr;
- uint16 zero = 0;
+ NTSTATUS status;
+ union dcerpc_payload u;
/* Free any memory in the current return data buffer. */
- prs_mem_free(&p->out_data.rdata);
-
- /*
- * 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.
- */
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
+ pipe_init_outgoing_data(p);
/*
* Initialize a bind_nak header.
*/
- init_rpc_hdr(&nak_hdr, RPC_BINDNACK, RPC_FLG_FIRST | RPC_FLG_LAST,
- p->hdr.call_id, RPC_HEADER_LEN + sizeof(uint16), 0);
-
- /*
- * Marshall the header into the outgoing PDU.
- */
+ ZERO_STRUCT(u);
- if(!smb_io_rpc_hdr("", &nak_hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("setup_bind_nak: marshalling of RPC_HDR failed.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
+ u.bind_nak.reject_reason = 0;
/*
- * Now add the reject reason.
+ * 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.
*/
- if(!prs_uint16("reject code", &p->out_data.frag, 0, &zero)) {
- prs_mem_free(&p->out_data.frag);
+ 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;
- if (p->auth.auth_data_free_func) {
- (*p->auth.auth_data_free_func)(&p->auth);
- }
+ free_pipe_auth_data(&p->auth);
p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
- p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
p->pipe_bound = False;
return True;
Marshall a fault pdu.
*******************************************************************/
-bool setup_fault_pdu(pipes_struct *p, NTSTATUS status)
+bool setup_fault_pdu(struct pipes_struct *p, NTSTATUS fault_status)
{
- RPC_HDR fault_hdr;
- RPC_HDR_RESP hdr_resp;
- RPC_HDR_FAULT fault_resp;
+ NTSTATUS status;
+ union dcerpc_payload u;
/* Free any memory in the current return data buffer. */
- prs_mem_free(&p->out_data.rdata);
-
- /*
- * 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.
- */
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
+ pipe_init_outgoing_data(p);
/*
* Initialize a fault header.
*/
- init_rpc_hdr(&fault_hdr, RPC_FAULT, RPC_FLG_FIRST | RPC_FLG_LAST | RPC_FLG_NOCALL,
- p->hdr.call_id, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_FAULT_LEN, 0);
-
- /*
- * Initialize the HDR_RESP and FAULT parts of the PDU.
- */
-
- memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
-
- fault_resp.status = status;
- fault_resp.reserved = 0;
-
- /*
- * Marshall the header into the outgoing PDU.
- */
-
- if(!smb_io_rpc_hdr("", &fault_hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("setup_fault_pdu: marshalling of RPC_HDR failed.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
- DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_RESP.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!smb_io_rpc_hdr_fault("fault", &fault_resp, &p->out_data.frag, 0)) {
- DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_FAULT.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- p->out_data.data_sent_length = 0;
- p->out_data.current_pdu_sent = 0;
-
- return True;
-}
-
-#if 0
-/*******************************************************************
- Marshall a cancel_ack pdu.
- We should probably check the auth-verifier here.
-*******************************************************************/
-
-bool setup_cancel_ack_reply(pipes_struct *p, prs_struct *rpc_in_p)
-{
- prs_struct outgoing_pdu;
- RPC_HDR ack_reply_hdr;
+ ZERO_STRUCT(u);
- /* Free any memory in the current return data buffer. */
- prs_mem_free(&p->out_data.rdata);
+ u.fault.status = NT_STATUS_V(fault_status);
+ u.fault._pad = data_blob_talloc_zero(p->mem_ctx, 4);
/*
* Marshall directly into the outgoing PDU space. We
* header and are never sending more than one PDU here.
*/
- prs_init_empty( &outgoing_pdu, p->mem_ctx, MARSHALL);
- prs_give_memory( &outgoing_pdu, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);
-
- /*
- * Initialize a cancel_ack header.
- */
-
- init_rpc_hdr(&ack_reply_hdr, RPC_CANCEL_ACK, RPC_FLG_FIRST | RPC_FLG_LAST,
- p->hdr.call_id, RPC_HEADER_LEN, 0);
-
- /*
- * Marshall the header into the outgoing PDU.
- */
-
- if(!smb_io_rpc_hdr("", &ack_reply_hdr, &outgoing_pdu, 0)) {
- DEBUG(0,("setup_cancel_ack_reply: marshalling of RPC_HDR failed.\n"));
- prs_mem_free(&outgoing_pdu);
+ 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_len = prs_offset(&outgoing_pdu);
p->out_data.current_pdu_sent = 0;
- prs_mem_free(&outgoing_pdu);
return True;
}
-#endif
/*******************************************************************
Ensure a bind request has the correct abstract & transfer interface.
struct ndr_syntax_id* transfer,
uint32 context_id)
{
- int i=0;
struct pipe_rpc_fns *context_fns;
DEBUG(3,("check_bind_req for %s\n",
- get_pipe_name_from_iface(&p->syntax)));
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
/* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
-
- for (i=0; i<rpc_lookup_size; i++) {
- DEBUGADD(10, ("checking %s\n", rpc_lookup[i].pipe.clnt));
- if (ndr_syntax_id_equal(
- abstract, &rpc_lookup[i].rpc_interface)
- && ndr_syntax_id_equal(
- transfer, &ndr_transfer_syntax)) {
- break;
- }
- }
-
- if (i == rpc_lookup_size) {
+ if (rpc_srv_pipe_exists_by_id(abstract) &&
+ ndr_syntax_id_equal(transfer, &ndr_transfer_syntax)) {
+ DEBUG(3, ("check_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
+ rpc_srv_get_pipe_cli_name(abstract),
+ rpc_srv_get_pipe_srv_name(abstract)));
+ } else {
return false;
}
return False;
}
- context_fns->cmds = rpc_lookup[i].cmds;
- context_fns->n_cmds = rpc_lookup[i].n_cmds;
+ 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;
/* add to the list of open contexts */
return True;
}
-/*******************************************************************
- Register commands to an RPC pipe
-*******************************************************************/
-
-NTSTATUS rpc_srv_register(int version, const char *clnt, const char *srv,
- const struct ndr_interface_table *iface,
- const struct api_struct *cmds, int size)
-{
- struct rpc_table *rpc_entry;
-
- if (!clnt || !srv || !cmds) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (version != SMB_RPC_INTERFACE_VERSION) {
- DEBUG(0,("Can't register rpc commands!\n"
- "You tried to register a rpc module with SMB_RPC_INTERFACE_VERSION %d"
- ", while this version of samba uses version %d!\n",
- version,SMB_RPC_INTERFACE_VERSION));
- return NT_STATUS_OBJECT_TYPE_MISMATCH;
- }
-
- /* TODO:
- *
- * we still need to make sure that don't register the same commands twice!!!
- *
- * --metze
- */
-
- /* We use a temporary variable because this call can fail and
- rpc_lookup will still be valid afterwards. It could then succeed if
- called again later */
- rpc_lookup_size++;
- rpc_entry = SMB_REALLOC_ARRAY_KEEP_OLD_ON_ERROR(rpc_lookup, struct rpc_table, rpc_lookup_size);
- if (NULL == rpc_entry) {
- rpc_lookup_size--;
- DEBUG(0, ("rpc_pipe_register_commands: memory allocation failed\n"));
- return NT_STATUS_NO_MEMORY;
- } else {
- rpc_lookup = rpc_entry;
- }
-
- rpc_entry = rpc_lookup + (rpc_lookup_size - 1);
- ZERO_STRUCTP(rpc_entry);
- rpc_entry->pipe.clnt = SMB_STRDUP(clnt);
- rpc_entry->pipe.srv = SMB_STRDUP(srv);
- rpc_entry->rpc_interface = iface->syntax_id;
- rpc_entry->cmds = cmds;
- rpc_entry->n_cmds = size;
-
- return NT_STATUS_OK;
-}
-
/**
* Is a named pipe known?
* @param[in] cli_filename The pipe name requested by the client
bool is_known_pipename(const char *cli_filename, struct ndr_syntax_id *syntax)
{
const char *pipename = cli_filename;
- int i;
+ NTSTATUS status;
if (strnequal(pipename, "\\PIPE\\", 6)) {
pipename += 5;
return false;
}
- for (i=0; i<rpc_lookup_size; i++) {
- if (strequal(pipename, rpc_lookup[i].pipe.clnt)) {
- *syntax = rpc_lookup[i].rpc_interface;
- return true;
- }
- }
-
- DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
- return false;
-}
-
-/*******************************************************************
- Handle a SPNEGO krb5 bind auth.
-*******************************************************************/
-
-static bool pipe_spnego_auth_bind_kerberos(pipes_struct *p, prs_struct *rpc_in_p, RPC_HDR_AUTH *pauth_info,
- DATA_BLOB *psecblob, prs_struct *pout_auth)
-{
- return False;
-}
-
-/*******************************************************************
- Handle the first part of a SPNEGO bind auth.
-*******************************************************************/
-
-static bool pipe_spnego_auth_bind_negotiate(pipes_struct *p, prs_struct *rpc_in_p,
- RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
-{
- DATA_BLOB blob;
- DATA_BLOB secblob;
- DATA_BLOB response;
- DATA_BLOB chal;
- char *OIDs[ASN1_MAX_OIDS];
- int i;
- NTSTATUS status;
- bool got_kerberos_mechanism = false;
- AUTH_NTLMSSP_STATE *a = NULL;
- RPC_HDR_AUTH auth_info;
-
- ZERO_STRUCT(secblob);
- ZERO_STRUCT(chal);
- ZERO_STRUCT(response);
-
- /* Grab the SPNEGO blob. */
- blob = data_blob(NULL,p->hdr.auth_len);
-
- if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
- DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to pull %u bytes - the SPNEGO auth header.\n",
- (unsigned int)p->hdr.auth_len ));
- goto err;
- }
-
- if (blob.data[0] != ASN1_APPLICATION(0)) {
- goto err;
- }
-
- /* parse out the OIDs and the first sec blob */
- if (!parse_negTokenTarg(blob, OIDs, &secblob)) {
- DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to parse the security blob.\n"));
- goto err;
- }
-
- if (strcmp(OID_KERBEROS5, OIDs[0]) == 0 || strcmp(OID_KERBEROS5_OLD, OIDs[0]) == 0) {
- got_kerberos_mechanism = true;
- }
-
- for (i=0;OIDs[i];i++) {
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got OID %s\n", OIDs[i]));
- TALLOC_FREE(OIDs[i]);
- }
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got secblob of size %lu\n", (unsigned long)secblob.length));
-
- if ( got_kerberos_mechanism && ((lp_security()==SEC_ADS) || USE_KERBEROS_KEYTAB) ) {
- bool ret = pipe_spnego_auth_bind_kerberos(p, rpc_in_p, pauth_info, &secblob, pout_auth);
- data_blob_free(&secblob);
- data_blob_free(&blob);
- return ret;
- }
-
- if (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP && p->auth.a_u.auth_ntlmssp_state) {
- /* Free any previous auth type. */
- free_pipe_ntlmssp_auth_data(&p->auth);
- }
-
- if (!got_kerberos_mechanism) {
- /* Initialize the NTLM engine. */
- status = auth_ntlmssp_start(&a);
- if (!NT_STATUS_IS_OK(status)) {
- goto err;
- }
-
- /*
- * Pass the first security blob of data to it.
- * This can return an error or NT_STATUS_MORE_PROCESSING_REQUIRED
- * which means we need another packet to complete the bind.
- */
-
- status = auth_ntlmssp_update(a, secblob, &chal);
-
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: auth_ntlmssp_update failed.\n"));
- goto err;
- }
-
- /* Generate the response blob we need for step 2 of the bind. */
- response = spnego_gen_auth_response(&chal, status, OID_NTLMSSP);
- } else {
- /*
- * SPNEGO negotiate down to NTLMSSP. The subsequent
- * code to process follow-up packets is not complete
- * yet. JRA.
- */
- response = spnego_gen_auth_response(NULL,
- NT_STATUS_MORE_PROCESSING_REQUIRED,
- OID_NTLMSSP);
+ if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
+ return true;
}
- /* Copy the blob into the pout_auth parse struct */
- init_rpc_hdr_auth(&auth_info, RPC_SPNEGO_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
- if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
- DEBUG(0,("pipe_spnego_auth_bind_negotiate: marshalling of RPC_HDR_AUTH failed.\n"));
- goto err;
+ status = smb_probe_module("rpc", pipename);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
+ return false;
}
+ DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename));
- if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
- DEBUG(0,("pipe_spnego_auth_bind_negotiate: marshalling of data blob failed.\n"));
- goto err;
+ /*
+ * Scan the list again for the interface id
+ */
+ if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
+ return true;
}
- p->auth.a_u.auth_ntlmssp_state = a;
- p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
- p->auth.auth_type = PIPE_AUTH_TYPE_SPNEGO_NTLMSSP;
-
- data_blob_free(&blob);
- data_blob_free(&secblob);
- data_blob_free(&chal);
- data_blob_free(&response);
+ DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
+ pipename));
- /* We can't set pipe_bound True yet - we need an RPC_ALTER_CONTEXT response packet... */
- return True;
-
- err:
-
- data_blob_free(&blob);
- data_blob_free(&secblob);
- data_blob_free(&chal);
- data_blob_free(&response);
-
- p->auth.a_u.auth_ntlmssp_state = NULL;
-
- return False;
+ return false;
}
/*******************************************************************
- Handle the second part of a SPNEGO bind auth.
+ Handle the first part of a SPNEGO bind auth.
*******************************************************************/
-static bool pipe_spnego_auth_bind_continue(pipes_struct *p, prs_struct *rpc_in_p,
- RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
+static bool pipe_spnego_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
{
- RPC_HDR_AUTH auth_info;
- DATA_BLOB spnego_blob;
- DATA_BLOB auth_blob;
- DATA_BLOB auth_reply;
- DATA_BLOB response;
- AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
-
- ZERO_STRUCT(spnego_blob);
- ZERO_STRUCT(auth_blob);
- ZERO_STRUCT(auth_reply);
- ZERO_STRUCT(response);
-
- /*
- * NB. If we've negotiated down from krb5 to NTLMSSP we'll currently
- * fail here as 'a' == NULL.
- */
- if (p->auth.auth_type != PIPE_AUTH_TYPE_SPNEGO_NTLMSSP || !a) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: not in NTLMSSP auth state.\n"));
- goto err;
- }
-
- /* Grab the SPNEGO blob. */
- spnego_blob = data_blob(NULL,p->hdr.auth_len);
-
- if (!prs_copy_data_out((char *)spnego_blob.data, rpc_in_p, p->hdr.auth_len)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: Failed to pull %u bytes - the SPNEGO auth header.\n",
- (unsigned int)p->hdr.auth_len ));
- goto err;
- }
-
- if (spnego_blob.data[0] != ASN1_CONTEXT(1)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob type.\n"));
- goto err;
- }
-
- if (!spnego_parse_auth(spnego_blob, &auth_blob)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob.\n"));
- goto err;
- }
-
- /*
- * The following call actually checks the challenge/response data.
- * for correctness against the given DOMAIN\user name.
- */
-
- if (!pipe_ntlmssp_verify_final(p, &auth_blob)) {
- goto err;
- }
-
- data_blob_free(&spnego_blob);
- data_blob_free(&auth_blob);
-
- /* Generate the spnego "accept completed" blob - no incoming data. */
- response = spnego_gen_auth_response(&auth_reply, NT_STATUS_OK, OID_NTLMSSP);
-
- /* Copy the blob into the pout_auth parse struct */
- init_rpc_hdr_auth(&auth_info, RPC_SPNEGO_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
- if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: marshalling of RPC_HDR_AUTH failed.\n"));
- goto err;
- }
+ struct spnego_context *spnego_ctx;
+ NTSTATUS status;
- if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: marshalling of data blob failed.\n"));
- goto err;
+ status = spnego_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &spnego_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
+ nt_errstr(status)));
+ return false;
}
- data_blob_free(&auth_reply);
- data_blob_free(&response);
-
- p->pipe_bound = True;
-
- return True;
-
- err:
+ /* Make sure data is bound to the memctx, to be freed the caller */
+ talloc_steal(mem_ctx, response->data);
- data_blob_free(&spnego_blob);
- data_blob_free(&auth_blob);
- data_blob_free(&auth_reply);
- data_blob_free(&response);
+ p->auth.a_u.spnego_state = spnego_ctx;
+ p->auth.auth_data_free_func = &free_pipe_spnego_auth_data;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_SPNEGO;
- free_pipe_ntlmssp_auth_data(&p->auth);
- p->auth.a_u.auth_ntlmssp_state = NULL;
+ DEBUG(10, ("SPNEGO auth started\n"));
- return False;
+ return true;
}
/*******************************************************************
Handle an schannel bind auth.
*******************************************************************/
-static bool pipe_schannel_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
- RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
+static bool pipe_schannel_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
{
- RPC_HDR_AUTH auth_info;
struct NL_AUTH_MESSAGE neg;
struct NL_AUTH_MESSAGE reply;
bool ret;
struct netlogon_creds_CredentialState *creds;
DATA_BLOB session_key;
enum ndr_err_code ndr_err;
- DATA_BLOB blob;
- blob = data_blob_const(prs_data_p(rpc_in_p) + prs_offset(rpc_in_p),
- prs_data_size(rpc_in_p));
-
- ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), NULL, &neg,
- (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
+ ndr_err = ndr_pull_struct_blob(
+ &auth_info->credentials, mem_ctx, &neg,
+ (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
return false;
*/
become_root();
- status = schannel_fetch_session_key(p->mem_ctx,
- neg.oem_netbios_computer.a,
- &creds);
+ status = schannel_get_creds_state(p, lp_private_dir(),
+ neg.oem_netbios_computer.a, &creds);
unbecome_root();
if (!NT_STATUS_IS_OK(status)) {
return False;
}
- p->auth.a_u.schannel_auth = talloc(p, struct schannel_auth_struct);
+ p->auth.a_u.schannel_auth = talloc(p, struct schannel_state);
if (!p->auth.a_u.schannel_auth) {
TALLOC_FREE(creds);
return False;
}
- memset(p->auth.a_u.schannel_auth->sess_key, 0, sizeof(p->auth.a_u.schannel_auth->sess_key));
- memcpy(p->auth.a_u.schannel_auth->sess_key, creds->session_key,
- sizeof(creds->session_key));
-
- TALLOC_FREE(creds);
-
+ p->auth.a_u.schannel_auth->state = SCHANNEL_STATE_START;
p->auth.a_u.schannel_auth->seq_num = 0;
+ p->auth.a_u.schannel_auth->initiator = false;
+ p->auth.a_u.schannel_auth->creds = creds;
/*
* JRA. Should we also copy the schannel session key into the pipe session key p->session_key
return false;
}
- init_rpc_hdr_auth(&auth_info, RPC_SCHANNEL_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
- if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
- DEBUG(0,("pipe_schannel_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
- return False;
- }
-
/*** SCHANNEL verifier ***/
reply.MessageType = NL_NEGOTIATE_RESPONSE;
* this has any meaning
* here - gd */
- ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), NULL, &reply,
+ ndr_err = ndr_push_struct_blob(response, mem_ctx, &reply,
(ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &reply);
}
- if (!prs_copy_data_in(pout_auth, (const char *)blob.data, blob.length)) {
- return false;
- }
-
DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
/* We're finished with this bind - no more packets. */
- p->auth.auth_data_free_func = NULL;
- p->auth.auth_type = PIPE_AUTH_TYPE_SCHANNEL;
+ p->auth.auth_data_free_func = &free_pipe_schannel_auth_data;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
p->pipe_bound = True;
Handle an NTLMSSP bind auth.
*******************************************************************/
-static bool pipe_ntlmssp_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
- RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
+static bool pipe_ntlmssp_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
{
- RPC_HDR_AUTH auth_info;
- DATA_BLOB blob;
- DATA_BLOB response;
NTSTATUS status;
- AUTH_NTLMSSP_STATE *a = NULL;
-
- ZERO_STRUCT(blob);
- ZERO_STRUCT(response);
-
- /* Grab the NTLMSSP blob. */
- blob = data_blob(NULL,p->hdr.auth_len);
-
- if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: Failed to pull %u bytes - the NTLM auth header.\n",
- (unsigned int)p->hdr.auth_len ));
- goto err;
- }
- if (strncmp((char *)blob.data, "NTLMSSP", 7) != 0) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: Failed to read NTLMSSP in blob\n"));
- goto err;
+ if (strncmp((char *)auth_info->credentials.data, "NTLMSSP", 7) != 0) {
+ DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
+ return false;
}
/* We have an NTLMSSP blob. */
- status = auth_ntlmssp_start(&a);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_start failed: %s\n",
- nt_errstr(status) ));
- goto err;
+ status = ntlmssp_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &p->auth.a_u.auth_ntlmssp_state);
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_OK)) {
+ DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
+ nt_errstr(status)));
+ return false;
}
- status = auth_ntlmssp_update(a, blob, &response);
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_update failed: %s\n",
- nt_errstr(status) ));
- goto err;
- }
+ /* Make sure data is bound to the memctx, to be freed the caller */
+ talloc_steal(mem_ctx, response->data);
- data_blob_free(&blob);
+ p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
- /* Copy the blob into the pout_auth parse struct */
- init_rpc_hdr_auth(&auth_info, RPC_NTLMSSP_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
- if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
- goto err;
- }
+ DEBUG(10, (__location__ ": NTLMSSP auth started\n"));
- if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: marshalling of data blob failed.\n"));
- goto err;
- }
+ return true;
+}
- p->auth.a_u.auth_ntlmssp_state = a;
- p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
- p->auth.auth_type = PIPE_AUTH_TYPE_NTLMSSP;
+/*******************************************************************
+ Handle a GSSAPI bind auth.
+*******************************************************************/
- data_blob_free(&blob);
- data_blob_free(&response);
+static bool pipe_gssapi_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
+{
+ NTSTATUS status;
+ struct gse_context *gse_ctx = NULL;
+
+ status = gssapi_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n",
+ nt_errstr(status)));
+ goto err;
+ }
- DEBUG(10,("pipe_ntlmssp_auth_bind: NTLMSSP auth started\n"));
+ /* Make sure data is bound to the memctx, to be freed the caller */
+ talloc_steal(mem_ctx, response->data);
- /* We can't set pipe_bound True yet - we need an RPC_AUTH3 response packet... */
- return True;
+ p->auth.a_u.gssapi_state = gse_ctx;
+ p->auth.auth_data_free_func = &free_pipe_gssapi_auth_data;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_KRB5;
- err:
+ DEBUG(10, ("KRB5 auth started\n"));
- data_blob_free(&blob);
- data_blob_free(&response);
+ return true;
- free_pipe_ntlmssp_auth_data(&p->auth);
- p->auth.a_u.auth_ntlmssp_state = NULL;
- return False;
+err:
+ TALLOC_FREE(gse_ctx);
+ return false;
}
-/*******************************************************************
- Respond to a pipe bind request.
-*******************************************************************/
-
-bool api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
+static NTSTATUS pipe_gssapi_verify_final(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ struct client_address *client_id,
+ struct auth_serversupplied_info **server_info)
{
- RPC_HDR_BA hdr_ba;
- RPC_HDR_RB hdr_rb;
- RPC_HDR_AUTH auth_info;
- uint16 assoc_gid;
- fstring ack_pipe_name;
- prs_struct out_hdr_ba;
- prs_struct out_auth;
- int i = 0;
- int auth_len = 0;
- unsigned int auth_type = RPC_ANONYMOUS_AUTH_TYPE;
+ DATA_BLOB session_key;
+ NTSTATUS status;
+ bool bret;
- /* No rebinds on a bound pipe - use alter context. */
- if (p->pipe_bound) {
- DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound "
- "pipe %s.\n", get_pipe_name_from_iface(&p->syntax)));
- return setup_bind_nak(p);
+ /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
+ ensure the underlying flags are also set. If not we should
+ refuse the bind. */
+
+ status = gssapi_server_check_flags(gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Requested Security Layers not honored!\n"));
+ return status;
}
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
+ status = gssapi_server_get_user_info(gse_ctx, mem_ctx,
+ client_id, server_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 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.
- */
+ if ((*server_info)->ptok == NULL) {
+ status = create_local_token(*server_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to create local user token (%s)\n",
+ nt_errstr(status)));
+ status = NT_STATUS_ACCESS_DENIED;
+ return status;
+ }
+ }
+ /* TODO: this is what the ntlmssp code does with the session_key, check
+ * it is ok with gssapi too */
/*
- * Setup the memory to marshall the ba header, and the
- * auth footers.
+ * 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.
*/
- if(!prs_init(&out_hdr_ba, 1024, p->mem_ctx, MARSHALL)) {
- DEBUG(0,("api_pipe_bind_req: malloc out_hdr_ba failed.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
+ session_key = generic_session_key();
+ if (session_key.data == NULL) {
+ return NT_STATUS_ACCESS_DENIED;
}
- if(!prs_init(&out_auth, 1024, p->mem_ctx, MARSHALL)) {
- DEBUG(0,("api_pipe_bind_req: malloc out_auth failed.\n"));
- prs_mem_free(&p->out_data.frag);
- prs_mem_free(&out_hdr_ba);
- return False;
+ bret = server_info_set_session_key((*server_info), session_key);
+ data_blob_free(&session_key);
+ if (!bret) {
+ return NT_STATUS_ACCESS_DENIED;
}
- DEBUG(5,("api_pipe_bind_req: decode request. %d\n", __LINE__));
+ return NT_STATUS_OK;
+}
- ZERO_STRUCT(hdr_rb);
+/*******************************************************************
+ Respond to a pipe bind request.
+*******************************************************************/
- /* decode the bind request */
+static bool api_pipe_bind_req(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
+{
+ struct dcerpc_auth auth_info;
+ uint16 assoc_gid;
+ unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
+ NTSTATUS status;
+ struct ndr_syntax_id id;
+ 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;
- if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_in_p, 0)) {
- DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_RB "
- "struct.\n"));
- goto err_exit;
+ /* No rebinds on a bound pipe - use alter context. */
+ if (p->pipe_bound) {
+ DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound "
+ "pipe %s.\n",
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
+ return setup_bind_nak(p, pkt);
}
- if (hdr_rb.num_contexts == 0) {
+ if (pkt->u.bind.num_contexts == 0) {
DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
goto err_exit;
}
* Try and find the correct pipe name to ensure
* that this is a pipe name we support.
*/
-
- for (i = 0; i < rpc_lookup_size; i++) {
- if (ndr_syntax_id_equal(&rpc_lookup[i].rpc_interface,
- &hdr_rb.rpc_context[0].abstract)) {
- DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
- rpc_lookup[i].pipe.clnt, rpc_lookup[i].pipe.srv));
- break;
- }
- }
-
- if (i == rpc_lookup_size) {
- NTSTATUS status;
-
+ id = pkt->u.bind.ctx_list[0].abstract_syntax;
+ if (rpc_srv_pipe_exists_by_id(&id)) {
+ DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
+ rpc_srv_get_pipe_cli_name(&id),
+ rpc_srv_get_pipe_srv_name(&id)));
+ } else {
status = smb_probe_module(
- "rpc", get_pipe_name_from_iface(
- &hdr_rb.rpc_context[0].abstract));
+ "rpc", get_pipe_name_from_syntax(
+ talloc_tos(),
+ &pkt->u.bind.ctx_list[0].abstract_syntax));
if (NT_STATUS_IS_ERR(status)) {
DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
- get_pipe_name_from_iface(&hdr_rb.rpc_context[0].abstract)));
- prs_mem_free(&p->out_data.frag);
- prs_mem_free(&out_hdr_ba);
- prs_mem_free(&out_auth);
-
- return setup_bind_nak(p);
- }
-
- for (i = 0; i < rpc_lookup_size; i++) {
- if (strequal(rpc_lookup[i].pipe.clnt,
- get_pipe_name_from_iface(&p->syntax))) {
- DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
- rpc_lookup[i].pipe.clnt, rpc_lookup[i].pipe.srv));
- break;
- }
- }
-
- if (i == rpc_lookup_size) {
+ get_pipe_name_from_syntax(
+ talloc_tos(),
+ &pkt->u.bind.ctx_list[0].abstract_syntax)));
+
+ return setup_bind_nak(p, pkt);
+ }
+
+ if (rpc_srv_get_pipe_interface_by_cli_name(
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax),
+ &id)) {
+ DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\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",
- get_pipe_name_from_iface(&p->syntax),
- get_pipe_name_from_iface(&p->syntax)));
- goto err_exit;
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax),
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ return setup_bind_nak(p, pkt);
}
}
- /* name has to be \PIPE\xxxxx */
- fstrcpy(ack_pipe_name, "\\PIPE\\");
- fstrcat(ack_pipe_name, rpc_lookup[i].pipe.srv);
-
DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
- /*
- * Check if this is an authenticated bind request.
- */
-
- if (p->hdr.auth_len) {
- /*
- * Decode the authentication verifier.
- */
-
- if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
- DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_AUTH struct.\n"));
- goto err_exit;
- }
-
- auth_type = auth_info.auth_type;
-
- /* Work out if we have to sign or seal etc. */
- switch (auth_info.auth_level) {
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
- break;
- case DCERPC_AUTH_LEVEL_PRIVACY:
- p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
- break;
- default:
- DEBUG(0,("api_pipe_bind_req: unexpected auth level (%u).\n",
- (unsigned int)auth_info.auth_level ));
- goto err_exit;
- }
+ if (pkt->u.bind.assoc_group_id != 0) {
+ assoc_gid = pkt->u.bind.assoc_group_id;
} else {
- ZERO_STRUCT(auth_info);
- }
-
- assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;
-
- switch(auth_type) {
- case RPC_NTLMSSP_AUTH_TYPE:
- if (!pipe_ntlmssp_auth_bind(p, rpc_in_p, &auth_info, &out_auth)) {
- goto err_exit;
- }
- assoc_gid = 0x7a77;
- break;
-
- case RPC_SCHANNEL_AUTH_TYPE:
- if (!pipe_schannel_auth_bind(p, rpc_in_p, &auth_info, &out_auth)) {
- goto err_exit;
- }
- break;
-
- case RPC_SPNEGO_AUTH_TYPE:
- if (!pipe_spnego_auth_bind_negotiate(p, rpc_in_p, &auth_info, &out_auth)) {
- goto err_exit;
- }
- break;
-
- case RPC_ANONYMOUS_AUTH_TYPE:
- /* Unauthenticated bind request. */
- /* We're finished - no more packets. */
- p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
- /* We must set the pipe auth_level here also. */
- p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
- p->pipe_bound = True;
- /* The session key was initialized from the SMB
- * session in make_internal_rpc_pipe_p */
- break;
-
- default:
- DEBUG(0,("api_pipe_bind_req: unknown auth type %x requested.\n", auth_type ));
- goto err_exit;
+ assoc_gid = 0x53f0;
}
/*
unknown to NT4)
Needed when adding entries to a DACL from NT5 - SK */
- if(check_bind_req(p, &hdr_rb.rpc_context[0].abstract, &hdr_rb.rpc_context[0].transfer[0],
- hdr_rb.rpc_context[0].context_id )) {
- init_rpc_hdr_ba(&hdr_ba,
- RPC_MAX_PDU_FRAG_LEN,
- RPC_MAX_PDU_FRAG_LEN,
- assoc_gid,
- ack_pipe_name,
- 0x1, 0x0, 0x0,
- &hdr_rb.rpc_context[0].transfer[0]);
+ 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 = 0;
+ bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
} else {
- /* Rejection reason: abstract syntax not supported */
- init_rpc_hdr_ba(&hdr_ba, RPC_MAX_PDU_FRAG_LEN,
- RPC_MAX_PDU_FRAG_LEN, assoc_gid,
- ack_pipe_name, 0x1, 0x2, 0x1,
- &null_ndr_syntax_id);
p->pipe_bound = False;
+ /* Rejection reason: abstract syntax not supported */
+ bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
+ bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
+ bind_ack_ctx.syntax = null_ndr_syntax_id;
}
/*
- * and marshall it.
- */
-
- if(!smb_io_rpc_hdr_ba("", &hdr_ba, &out_hdr_ba, 0)) {
- DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR_BA failed.\n"));
- goto err_exit;
- }
-
- /*
- * Create the header, now we know the length.
- */
-
- if (prs_offset(&out_auth)) {
- auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
- }
-
- init_rpc_hdr(&p->hdr, RPC_BINDACK, RPC_FLG_FIRST | RPC_FLG_LAST,
- p->hdr.call_id,
- RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
- auth_len);
-
- /*
- * Marshall the header into the outgoing PDU.
- */
-
- if(!smb_io_rpc_hdr("", &p->hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR failed.\n"));
- goto err_exit;
- }
-
- /*
- * Now add the RPC_HDR_BA and any auth needed.
- */
-
- if(!prs_append_prs_data(&p->out_data.frag, &out_hdr_ba)) {
- DEBUG(0,("api_pipe_bind_req: append of RPC_HDR_BA failed.\n"));
- goto err_exit;
- }
-
- if (auth_len && !prs_append_prs_data( &p->out_data.frag, &out_auth)) {
- DEBUG(0,("api_pipe_bind_req: 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;
-
- prs_mem_free(&out_hdr_ba);
- prs_mem_free(&out_auth);
-
- return True;
-
- err_exit:
-
- prs_mem_free(&p->out_data.frag);
- prs_mem_free(&out_hdr_ba);
- prs_mem_free(&out_auth);
- return setup_bind_nak(p);
-}
-
-/****************************************************************************
- Deal with an alter context call. Can be third part of 3 leg auth request for
- SPNEGO calls.
-****************************************************************************/
-
-bool api_pipe_alter_context(pipes_struct *p, prs_struct *rpc_in_p)
-{
- RPC_HDR_BA hdr_ba;
- RPC_HDR_RB hdr_rb;
- RPC_HDR_AUTH auth_info;
- uint16 assoc_gid;
- fstring ack_pipe_name;
- prs_struct out_hdr_ba;
- prs_struct out_auth;
- int auth_len = 0;
-
- prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
-
- /*
- * 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.
- */
-
- /*
- * Setup the memory to marshall the ba header, and the
- * auth footers.
- */
-
- if(!prs_init(&out_hdr_ba, 1024, p->mem_ctx, MARSHALL)) {
- DEBUG(0,("api_pipe_alter_context: malloc out_hdr_ba failed.\n"));
- prs_mem_free(&p->out_data.frag);
- return False;
- }
-
- if(!prs_init(&out_auth, 1024, p->mem_ctx, MARSHALL)) {
- DEBUG(0,("api_pipe_alter_context: malloc out_auth failed.\n"));
- prs_mem_free(&p->out_data.frag);
- prs_mem_free(&out_hdr_ba);
- return False;
- }
-
- ZERO_STRUCT(hdr_rb);
-
- DEBUG(5,("api_pipe_alter_context: decode request. %d\n", __LINE__));
-
- /* decode the alter context request */
- if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_in_p, 0)) {
- DEBUG(0,("api_pipe_alter_context: unable to unmarshall RPC_HDR_RB struct.\n"));
- goto err_exit;
- }
-
- /* secondary address CAN be NULL
- * as the specs say it's ignored.
- * It MUST be NULL to have the spoolss working.
- */
- fstrcpy(ack_pipe_name,"");
-
- DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
-
- /*
- * Check if this is an authenticated alter context request.
+ * Check if this is an authenticated bind request.
*/
+ if (pkt->auth_length) {
+ /* Quick length check. Won't catch a bad auth footer,
+ * prevents overrun. */
+
+ if (pkt->frag_length < RPC_HEADER_LEN +
+ DCERPC_AUTH_TRAILER_LENGTH +
+ pkt->auth_length) {
+ DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
+ "too long for fragment %u.\n",
+ (unsigned int)pkt->auth_length,
+ (unsigned int)pkt->frag_length));
+ goto err_exit;
+ }
- if (p->hdr.auth_len != 0) {
- /*
+ /*
* Decode the authentication verifier.
*/
+ status = dcerpc_pull_dcerpc_auth(pkt,
+ &pkt->u.bind.auth_info,
+ &auth_info, p->endian);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
+ goto err_exit;
+ }
+
+ auth_type = auth_info.auth_type;
- if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
- DEBUG(0,("api_pipe_alter_context: unable to unmarshall RPC_HDR_AUTH struct.\n"));
+ /* Work out if we have to sign or seal etc. */
+ switch (auth_info.auth_level) {
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
+ break;
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
+ break;
+ default:
+ DEBUG(0, ("Unexpected auth level (%u).\n",
+ (unsigned int)auth_info.auth_level ));
goto err_exit;
}
- /*
- * Currently only the SPNEGO auth type uses the alter ctx
- * response in place of the NTLMSSP auth3 type.
- */
+ switch (auth_type) {
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ if (!pipe_ntlmssp_auth_bind(p, pkt,
+ &auth_info, &auth_resp)) {
+ goto err_exit;
+ }
+ assoc_gid = 0x7a77;
+ break;
- if (auth_info.auth_type == RPC_SPNEGO_AUTH_TYPE) {
- /* We can only finish if the pipe is unbound. */
- if (!p->pipe_bound) {
- if (!pipe_spnego_auth_bind_continue(p, rpc_in_p, &auth_info, &out_auth)) {
- goto err_exit;
- }
- } else {
+ case DCERPC_AUTH_TYPE_SCHANNEL:
+ if (!pipe_schannel_auth_bind(p, pkt,
+ &auth_info, &auth_resp)) {
goto err_exit;
}
- }
- } else {
- ZERO_STRUCT(auth_info);
- }
+ break;
- assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ if (!pipe_spnego_auth_bind(p, pkt,
+ &auth_info, &auth_resp)) {
+ goto err_exit;
+ }
+ break;
- /*
- * Create the bind response struct.
- */
+ case DCERPC_AUTH_TYPE_KRB5:
+ if (!pipe_gssapi_auth_bind(p, pkt,
+ &auth_info, &auth_resp)) {
+ goto err_exit;
+ }
+ break;
- /* 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 */
+ case DCERPC_AUTH_TYPE_NONE:
+ break;
- if(check_bind_req(p, &hdr_rb.rpc_context[0].abstract, &hdr_rb.rpc_context[0].transfer[0],
- hdr_rb.rpc_context[0].context_id )) {
- init_rpc_hdr_ba(&hdr_ba,
- RPC_MAX_PDU_FRAG_LEN,
- RPC_MAX_PDU_FRAG_LEN,
- assoc_gid,
- ack_pipe_name,
- 0x1, 0x0, 0x0,
- &hdr_rb.rpc_context[0].transfer[0]);
- } else {
- /* Rejection reason: abstract syntax not supported */
- init_rpc_hdr_ba(&hdr_ba, RPC_MAX_PDU_FRAG_LEN,
- RPC_MAX_PDU_FRAG_LEN, assoc_gid,
- ack_pipe_name, 0x1, 0x2, 0x1,
- &null_ndr_syntax_id);
- p->pipe_bound = False;
+ default:
+ DEBUG(0, ("Unknown auth type %x requested.\n", auth_type));
+ goto err_exit;
+ }
}
- /*
- * and marshall it.
- */
-
- if(!smb_io_rpc_hdr_ba("", &hdr_ba, &out_hdr_ba, 0)) {
- DEBUG(0,("api_pipe_alter_context: marshalling of RPC_HDR_BA failed.\n"));
- goto err_exit;
+ if (auth_type == DCERPC_AUTH_TYPE_NONE) {
+ /* Unauthenticated bind request. */
+ /* We're finished - no more packets. */
+ p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
+ /* We must set the pipe auth_level here also. */
+ p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
+ p->pipe_bound = True;
+ /* The session key was initialized from the SMB
+ * session in make_internal_rpc_pipe_p */
}
- /*
- * Create the header, now we know the length.
- */
+ 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;
- if (prs_offset(&out_auth)) {
- auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
+ /* name has to be \PIPE\xxxxx */
+ u.bind_ack.secondary_address =
+ talloc_asprintf(pkt, "\\PIPE\\%s",
+ rpc_srv_get_pipe_srv_name(&id));
+ if (!u.bind_ack.secondary_address) {
+ DEBUG(0, ("Out of memory!\n"));
+ goto err_exit;
}
+ 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;
- init_rpc_hdr(&p->hdr, RPC_ALTCONTRESP, RPC_FLG_FIRST | RPC_FLG_LAST,
- p->hdr.call_id,
- RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
- auth_len);
+ /* NOTE: We leave the auth_info empty so we can calculate the padding
+ * later and then append the auth_info --simo */
/*
- * Marshall the header into the outgoing PDU.
+ * 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.
*/
- if(!smb_io_rpc_hdr("", &p->hdr, &p->out_data.frag, 0)) {
- DEBUG(0,("api_pipe_alter_context: marshalling of RPC_HDR failed.\n"));
- goto err_exit;
+ status = dcerpc_push_ncacn_packet(p->mem_ctx,
+ DCERPC_PKT_BIND_ACK,
+ 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 bind_ack packet. (%s)\n",
+ nt_errstr(status)));
}
- /*
- * Now add the RPC_HDR_BA and any auth needed.
- */
+ if (auth_resp.length) {
- if(!prs_append_prs_data(&p->out_data.frag, &out_hdr_ba)) {
- DEBUG(0,("api_pipe_alter_context: append of RPC_HDR_BA failed.\n"));
- goto err_exit;
+ status = dcerpc_push_dcerpc_auth(pkt,
+ auth_type,
+ auth_info.auth_level,
+ 0,
+ 1, /* auth_context_id */
+ &auth_resp,
+ &auth_blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
+ goto err_exit;
+ }
}
- if (auth_len && !prs_append_prs_data(&p->out_data.frag, &out_auth)) {
- DEBUG(0,("api_pipe_alter_context: append of auth info 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;
+ }
}
/*
p->out_data.data_sent_length = 0;
p->out_data.current_pdu_sent = 0;
- prs_mem_free(&out_hdr_ba);
- prs_mem_free(&out_auth);
-
+ TALLOC_FREE(auth_blob.data);
return True;
err_exit:
- prs_mem_free(&p->out_data.frag);
- prs_mem_free(&out_hdr_ba);
- prs_mem_free(&out_auth);
- return setup_bind_nak(p);
+ data_blob_free(&p->out_data.frag);
+ TALLOC_FREE(auth_blob.data);
+ return setup_bind_nak(p, pkt);
}
/****************************************************************************
- Deal with NTLMSSP sign & seal processing on an RPC request.
+ Deal with an alter context call. Can be third part of 3 leg auth request for
+ SPNEGO calls.
****************************************************************************/
-bool api_pipe_ntlmssp_auth_process(pipes_struct *p, prs_struct *rpc_in,
- uint32 *p_ss_padding_len, NTSTATUS *pstatus)
+static bool api_pipe_alter_context(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
{
- RPC_HDR_AUTH auth_info;
- uint32 auth_len = p->hdr.auth_len;
- uint32 save_offset = prs_offset(rpc_in);
- AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
- unsigned char *data = NULL;
- size_t data_len;
- unsigned char *full_packet_data = NULL;
- size_t full_packet_data_len;
- DATA_BLOB auth_blob;
-
- *pstatus = NT_STATUS_OK;
-
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_NONE || p->auth.auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
- return True;
- }
+ struct dcerpc_auth auth_info;
+ uint16 assoc_gid;
+ NTSTATUS status;
+ 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;
+ int pad_len = 0;
- if (!a) {
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
- }
+ DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
- /* Ensure there's enough data for an authenticated request. */
- if ((auth_len > RPC_MAX_SIGN_SIZE) ||
- (RPC_HEADER_LEN + RPC_HDR_REQ_LEN + RPC_HDR_AUTH_LEN + auth_len > p->hdr.frag_len)) {
- DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len %u is too large.\n",
- (unsigned int)auth_len ));
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
+ if (pkt->u.bind.assoc_group_id != 0) {
+ assoc_gid = pkt->u.bind.assoc_group_id;
+ } else {
+ assoc_gid = 0x53f0;
}
/*
- * We need the full packet data + length (minus auth stuff) as well as the packet data + length
- * after the RPC header.
- * We need to pass in the full packet (minus auth len) to the NTLMSSP sign and check seal
- * functions as NTLMv2 checks the rpc headers also.
+ * Create the bind response struct.
*/
- data = (unsigned char *)(prs_data_p(rpc_in) + RPC_HDR_REQ_LEN);
- data_len = (size_t)(p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN - RPC_HDR_AUTH_LEN - auth_len);
-
- full_packet_data = p->in_data.current_in_pdu;
- full_packet_data_len = p->hdr.frag_len - auth_len;
-
- /* Pull the auth header and the following data into a blob. */
- if(!prs_set_offset(rpc_in, RPC_HDR_REQ_LEN + data_len)) {
- DEBUG(0,("api_pipe_ntlmssp_auth_process: cannot move offset to %u.\n",
- (unsigned int)RPC_HDR_REQ_LEN + (unsigned int)data_len ));
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
- }
-
- if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in, 0)) {
- DEBUG(0,("api_pipe_ntlmssp_auth_process: failed to unmarshall RPC_HDR_AUTH.\n"));
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
- }
-
- auth_blob.data = (unsigned char *)prs_data_p(rpc_in) + prs_offset(rpc_in);
- auth_blob.length = auth_len;
-
- switch (p->auth.auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- /* Data is encrypted. */
- *pstatus = ntlmssp_unseal_packet(a->ntlmssp_state,
- data, data_len,
- full_packet_data,
- full_packet_data_len,
- &auth_blob);
- if (!NT_STATUS_IS_OK(*pstatus)) {
- return False;
- }
- break;
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- /* Data is signed. */
- *pstatus = ntlmssp_check_packet(a->ntlmssp_state,
- data, data_len,
- full_packet_data,
- full_packet_data_len,
- &auth_blob);
- if (!NT_STATUS_IS_OK(*pstatus)) {
- return False;
- }
- break;
- default:
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
- }
+ /* 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 */
- /*
- * Return the current pointer to the data offset.
- */
+ 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)) {
- if(!prs_set_offset(rpc_in, save_offset)) {
- DEBUG(0,("api_pipe_auth_process: failed to set offset back to %u\n",
- (unsigned int)save_offset ));
- *pstatus = NT_STATUS_INVALID_PARAMETER;
- return False;
+ bind_ack_ctx.result = 0;
+ bind_ack_ctx.reason = 0;
+ bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
+ } else {
+ p->pipe_bound = False;
+ /* Rejection reason: abstract syntax not supported */
+ bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
+ bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
+ bind_ack_ctx.syntax = null_ndr_syntax_id;
}
/*
- * Remember the padding length. We must remove it from the real data
- * stream once the sign/seal is done.
+ * Check if this is an authenticated alter context request.
*/
+ if (pkt->auth_length) {
+ /* Quick length check. Won't catch a bad auth footer,
+ * prevents overrun. */
+
+ if (pkt->frag_length < RPC_HEADER_LEN +
+ DCERPC_AUTH_TRAILER_LENGTH +
+ pkt->auth_length) {
+ DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
+ "too long for fragment %u.\n",
+ (unsigned int)pkt->auth_length,
+ (unsigned int)pkt->frag_length ));
+ goto err_exit;
+ }
- *p_ss_padding_len = auth_info.auth_pad_len;
+ status = dcerpc_pull_dcerpc_auth(pkt,
+ &pkt->u.bind.auth_info,
+ &auth_info, p->endian);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
+ goto err_exit;
+ }
- return True;
-}
+ /* 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;
+ }
-/****************************************************************************
- Deal with schannel processing on an RPC request.
-****************************************************************************/
+ switch (auth_info.auth_type) {
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ status = spnego_server_step(p->auth.a_u.spnego_state,
+ pkt,
+ &auth_info.credentials,
+ &auth_resp);
+ break;
-bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss_padding_len)
-{
- uint32 data_len;
- uint32 auth_len;
- uint32 save_offset = prs_offset(rpc_in);
- RPC_HDR_AUTH auth_info;
- struct NL_AUTH_SIGNATURE schannel_chk;
- enum ndr_err_code ndr_err;
- DATA_BLOB blob;
+ case DCERPC_AUTH_TYPE_KRB5:
+ status = gssapi_server_step(p->auth.a_u.gssapi_state,
+ pkt,
+ &auth_info.credentials,
+ &auth_resp);
+ break;
- auth_len = p->hdr.auth_len;
+ default:
+ DEBUG(3, (__location__ ": Usupported auth type (%d) "
+ "in alter-context call\n",
+ auth_info.auth_type));
+ goto err_exit;
+ }
- if (auth_len < RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN ||
- auth_len > RPC_HEADER_LEN +
- RPC_HDR_REQ_LEN +
- RPC_HDR_AUTH_LEN +
- auth_len) {
- DEBUG(0,("Incorrect auth_len %u.\n", (unsigned int)auth_len ));
- return False;
+ 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;
+ }
}
- /*
- * The following is that length of the data we must verify or unseal.
- * This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN
- * preceeding the auth_data.
- */
+ 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;
- if (p->hdr.frag_len < RPC_HEADER_LEN + RPC_HDR_REQ_LEN + RPC_HDR_AUTH_LEN + auth_len) {
- DEBUG(0,("Incorrect frag %u, auth %u.\n",
- (unsigned int)p->hdr.frag_len,
- (unsigned int)auth_len ));
- return False;
- }
+ /* 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;
- data_len = p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN -
- RPC_HDR_AUTH_LEN - auth_len;
+ u.alter_resp.num_results = 1;
+ u.alter_resp.ctx_list = &bind_ack_ctx;
- DEBUG(5,("data %d auth %d\n", data_len, auth_len));
+ /* NOTE: We leave the auth_info empty so we can calculate the padding
+ * later and then append the auth_info --simo */
- if(!prs_set_offset(rpc_in, RPC_HDR_REQ_LEN + data_len)) {
- DEBUG(0,("cannot move offset to %u.\n",
- (unsigned int)RPC_HDR_REQ_LEN + data_len ));
- return False;
- }
+ /*
+ * 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.
+ */
- if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in, 0)) {
- DEBUG(0,("failed to unmarshall RPC_HDR_AUTH.\n"));
- return False;
+ 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 bind_ack packet. (%s)\n",
+ nt_errstr(status)));
}
- if (auth_info.auth_type != RPC_SCHANNEL_AUTH_TYPE) {
- DEBUG(0,("Invalid auth info %d on schannel\n",
- auth_info.auth_type));
- return False;
- }
+ if (auth_resp.length) {
- blob = data_blob_const(prs_data_p(rpc_in) + prs_offset(rpc_in), auth_len);
+ /* Work out any padding needed before the auth footer. */
+ pad_len = p->out_data.frag.length % SERVER_NDR_PADDING_SIZE;
+ if (pad_len) {
+ pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
+ DEBUG(10, ("auth pad_len = %u\n",
+ (unsigned int)pad_len));
+ }
- ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), NULL, &schannel_chk,
- (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_SIGNATURE);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- DEBUG(0,("failed to pull NL_AUTH_SIGNATURE\n"));
- dump_data(2, blob.data, blob.length);
- return false;
+ status = dcerpc_push_dcerpc_auth(pkt,
+ auth_info.auth_type,
+ auth_info.auth_level,
+ pad_len,
+ 1, /* auth_context_id */
+ &auth_resp,
+ &auth_blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
+ goto err_exit;
+ }
}
- if (DEBUGLEVEL >= 10) {
- NDR_PRINT_DEBUG(NL_AUTH_SIGNATURE, &schannel_chk);
- }
+ /* 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 +
+ pad_len + auth_blob.length);
+
+ if (auth_resp.length) {
+ if (pad_len) {
+ char pad[SERVER_NDR_PADDING_SIZE];
+ memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
+ if (!data_blob_append(p->mem_ctx,
+ &p->out_data.frag,
+ pad, pad_len)) {
+ DEBUG(0, ("api_pipe_bind_req: failed to add "
+ "%u bytes of pad data.\n",
+ (unsigned int)pad_len));
+ goto err_exit;
+ }
+ }
- if (!schannel_decode(p->auth.a_u.schannel_auth,
- p->auth.auth_level,
- SENDER_IS_INITIATOR,
- &schannel_chk,
- prs_data_p(rpc_in)+RPC_HDR_REQ_LEN, data_len)) {
- DEBUG(3,("failed to decode PDU\n"));
- return False;
+ 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;
+ }
}
/*
- * Return the current pointer to the data offset.
+ * Setup the lengths for the initial reply.
*/
- if(!prs_set_offset(rpc_in, save_offset)) {
- DEBUG(0,("failed to set offset back to %u\n",
- (unsigned int)save_offset ));
- return False;
- }
-
- /* The sequence number gets incremented on both send and receive. */
- p->auth.a_u.schannel_auth->seq_num++;
+ p->out_data.data_sent_length = 0;
+ p->out_data.current_pdu_sent = 0;
- /*
- * Remember the padding length. We must remove it from the real data
- * stream once the sign/seal is done.
- */
+ TALLOC_FREE(auth_blob.data);
+ return True;
- *p_ss_padding_len = auth_info.auth_pad_len;
+ err_exit:
- return True;
+ data_blob_free(&p->out_data.frag);
+ TALLOC_FREE(auth_blob.data);
+ return setup_bind_nak(p, pkt);
}
/****************************************************************************
return NULL;
}
-/****************************************************************************
- Memory cleanup.
-****************************************************************************/
-
-void free_pipe_rpc_context( PIPE_RPC_FNS *list )
-{
- PIPE_RPC_FNS *tmp = list;
- PIPE_RPC_FNS *tmp2;
-
- while (tmp) {
- tmp2 = tmp->next;
- SAFE_FREE(tmp);
- tmp = tmp2;
- }
-
- return;
-}
-
-static bool api_rpcTNP(pipes_struct *p,
+static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
const struct api_struct *api_rpc_cmds, int n_cmds);
/****************************************************************************
before doing the call.
****************************************************************************/
-bool api_pipe_request(pipes_struct *p)
+static bool api_pipe_request(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
{
bool ret = False;
bool changed_user = False;
PIPE_RPC_FNS *pipe_fns;
if (p->pipe_bound &&
- ((p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) ||
- (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP))) {
+ ((p->auth.auth_type == DCERPC_AUTH_TYPE_NTLMSSP) ||
+ (p->auth.auth_type == DCERPC_AUTH_TYPE_KRB5) ||
+ (p->auth.auth_type == DCERPC_AUTH_TYPE_SPNEGO))) {
if(!become_authenticated_pipe_user(p)) {
- prs_mem_free(&p->out_data.rdata);
+ data_blob_free(&p->out_data.rdata);
return False;
}
changed_user = True;
}
DEBUG(5, ("Requested \\PIPE\\%s\n",
- get_pipe_name_from_iface(&p->syntax)));
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
/* get the set of RPC functions for this context */
- pipe_fns = find_pipe_fns_by_context(p->contexts, p->hdr_req.context_id);
+ pipe_fns = find_pipe_fns_by_context(p->contexts,
+ pkt->u.request.context_id);
if ( pipe_fns ) {
TALLOC_CTX *frame = talloc_stackframe();
- ret = api_rpcTNP(p, pipe_fns->cmds, pipe_fns->n_cmds);
+ ret = api_rpcTNP(p, pkt, pipe_fns->cmds, pipe_fns->n_cmds);
TALLOC_FREE(frame);
}
else {
- DEBUG(0,("api_pipe_request: No rpc function table associated with context [%d] on pipe [%s]\n",
- p->hdr_req.context_id,
- get_pipe_name_from_iface(&p->syntax)));
+ DEBUG(0, ("No rpc function table associated with context "
+ "[%d] on pipe [%s]\n",
+ pkt->u.request.context_id,
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
}
if (changed_user) {
Calls the underlying RPC function for a named pipe.
********************************************************************/
-static bool api_rpcTNP(pipes_struct *p,
+static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
const struct api_struct *api_rpc_cmds, int n_cmds)
{
int fn_num;
- uint32 offset1, offset2;
+ uint32_t offset1;
/* interpret the command */
DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
- get_pipe_name_from_iface(&p->syntax), p->hdr_req.opnum));
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
+ pkt->u.request.opnum));
if (DEBUGLEVEL >= 50) {
fstring name;
slprintf(name, sizeof(name)-1, "in_%s",
- get_pipe_name_from_iface(&p->syntax));
- prs_dump(name, p->hdr_req.opnum, &p->in_data.data);
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
+ 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 == p->hdr_req.opnum && api_rpc_cmds[fn_num].fn != NULL) {
- DEBUG(3,("api_rpcTNP: rpc command: %s\n", api_rpc_cmds[fn_num].name));
+ 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;
}
}
return True;
}
- offset1 = prs_offset(&p->out_data.rdata);
+ 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",
- get_pipe_name_from_iface(&p->syntax),
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
api_rpc_cmds[fn_num].name));
- prs_mem_free(&p->out_data.rdata);
+ data_blob_free(&p->out_data.rdata);
return False;
}
return True;
}
- offset2 = prs_offset(&p->out_data.rdata);
- prs_set_offset(&p->out_data.rdata, offset1);
if (DEBUGLEVEL >= 50) {
fstring name;
slprintf(name, sizeof(name)-1, "out_%s",
- get_pipe_name_from_iface(&p->syntax));
- prs_dump(name, p->hdr_req.opnum, &p->out_data.rdata);
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
+ dump_pdu_region(name, pkt->u.request.opnum,
+ &p->out_data.rdata, offset1,
+ p->out_data.rdata.length);
}
- prs_set_offset(&p->out_data.rdata, offset2);
DEBUG(5,("api_rpcTNP: called %s successfully\n",
- get_pipe_name_from_iface(&p->syntax)));
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
/* 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);
+ }
- if ((DEBUGLEVEL >= 10) &&
- (prs_offset(&p->in_data.data) != prs_data_size(&p->in_data.data))) {
- size_t data_len = prs_data_size(&p->in_data.data) - prs_offset(&p->in_data.data);
- char *data = (char *)SMB_MALLOC(data_len);
+ return True;
+}
- DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
- if (data) {
- prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data, (uint32)data_len);
- SAFE_FREE(data);
+/****************************************************************************
+ 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 = True;
+ DEBUG(10, ("set_incoming_fault: Setting fault state on pipe %s\n",
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
+}
+
+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;
+ size_t pad_len;
+
+ 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,
+ &pad_len);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+
+ /* remove padding and auth trailer,
+ * this way the caller will get just the data */
+ if (pkt->auth_length) {
+ size_t trail_len = pad_len
+ + DCERPC_AUTH_TRAILER_LENGTH
+ + pkt->auth_length;
+ if (pkt->u.request.stub_and_verifier.length < trail_len) {
+ return NT_STATUS_INFO_LENGTH_MISMATCH;
+ }
+ pkt->u.request.stub_and_verifier.length -= trail_len;
+ }
+
+ 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;
+
+ if (!p->pipe_bound) {
+ DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
+ 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) {
+ bool ret = False;
+ /*
+ * Ok - we finally have a complete RPC stream.
+ * Call the rpc command to process it.
+ */
+
+ /*
+ * Process the complete data stream here.
+ */
+ if (pipe_init_outgoing_data(p)) {
+ ret = api_pipe_request(p, pkt);
}
+ return ret;
}
return True;
}
+
+/****************************************************************************
+ Processes a finished PDU stored in p->in_data.pdu.
+****************************************************************************/
+
+void process_complete_pdu(struct pipes_struct *p)
+{
+ struct ncacn_packet *pkt = NULL;
+ NTSTATUS status;
+ bool reply = False;
+
+ if(p->fault_state) {
+ DEBUG(10,("process_complete_pdu: pipe %s in fault state.\n",
+ get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
+ goto done;
+ }
+
+ pkt = talloc(p->mem_ctx, struct ncacn_packet);
+ if (!pkt) {
+ DEBUG(0, ("Out of memory!\n"));
+ goto done;
+ }
+
+ /*
+ * Ensure we're using the corrent endianness for both the
+ * RPC header flags and the raw data we will be reading from.
+ */
+ if (dcerpc_get_endian_flag(&p->in_data.pdu) & DCERPC_DREP_LE) {
+ p->endian = RPC_LITTLE_ENDIAN;
+ } else {
+ p->endian = RPC_BIG_ENDIAN;
+ }
+ DEBUG(10, ("PDU is in %s Endian format!\n", p->endian?"Big":"Little"));
+
+ status = dcerpc_pull_ncacn_packet(pkt, &p->in_data.pdu,
+ pkt, p->endian);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to unmarshal rpc packet: %s!\n",
+ nt_errstr(status)));
+ goto done;
+ }
+
+ /* Store the call_id */
+ p->call_id = pkt->call_id;
+
+ DEBUG(10, ("Processing packet type %d\n", (int)pkt->ptype));
+
+ switch (pkt->ptype) {
+ case DCERPC_PKT_REQUEST:
+ reply = process_request_pdu(p, pkt);
+ break;
+
+ case DCERPC_PKT_PING: /* CL request - ignore... */
+ DEBUG(0, ("process_complete_pdu: Error. "
+ "Connectionless packet type %d received on "
+ "pipe %s.\n", (int)pkt->ptype,
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ break;
+
+ case DCERPC_PKT_RESPONSE: /* No responses here. */
+ DEBUG(0, ("process_complete_pdu: Error. "
+ "DCERPC_PKT_RESPONSE received from client "
+ "on pipe %s.\n",
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ 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, ("process_complete_pdu: Error. "
+ "Connectionless packet type %u received on "
+ "pipe %s.\n", (unsigned int)pkt->ptype,
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ break;
+
+ case DCERPC_PKT_BIND:
+ /*
+ * We assume that a pipe bind is only in one pdu.
+ */
+ if (pipe_init_outgoing_data(p)) {
+ reply = api_pipe_bind_req(p, pkt);
+ }
+ break;
+
+ case DCERPC_PKT_BIND_ACK:
+ case DCERPC_PKT_BIND_NAK:
+ DEBUG(0, ("process_complete_pdu: Error. "
+ "DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
+ "packet type %u received on pipe %s.\n",
+ (unsigned int)pkt->ptype,
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ break;
+
+
+ case DCERPC_PKT_ALTER:
+ /*
+ * We assume that a pipe bind is only in one pdu.
+ */
+ if (pipe_init_outgoing_data(p)) {
+ reply = api_pipe_alter_context(p, pkt);
+ }
+ break;
+
+ case DCERPC_PKT_ALTER_RESP:
+ DEBUG(0, ("process_complete_pdu: Error. "
+ "DCERPC_PKT_ALTER_RESP on pipe %s: "
+ "Should only be server -> client.\n",
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ break;
+
+ case DCERPC_PKT_AUTH3:
+ /*
+ * The third packet in an auth exchange.
+ */
+ if (pipe_init_outgoing_data(p)) {
+ reply = api_pipe_bind_auth3(p, pkt);
+ }
+ break;
+
+ case DCERPC_PKT_SHUTDOWN:
+ DEBUG(0, ("process_complete_pdu: Error. "
+ "DCERPC_PKT_SHUTDOWN on pipe %s: "
+ "Should only be server -> client.\n",
+ get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ 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) {
+ DEBUG(3,("process_complete_pdu: DCE/RPC fault sent on "
+ "pipe %s\n", get_pipe_name_from_syntax(talloc_tos(),
+ &p->syntax)));
+ set_incoming_fault(p);
+ setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
+ TALLOC_FREE(pkt);
+ } else {
+ /*
+ * Reset the lengths. We're ready for a new pdu.
+ */
+ TALLOC_FREE(p->in_data.pdu.data);
+ p->in_data.pdu_needed_len = 0;
+ p->in_data.pdu.length = 0;
+ }
+
+ TALLOC_FREE(pkt);
+}
+
git.samba.org / samba.git / blobdiff