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-rw-r--r--source3/rpc_server/srv_util.c477
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diff --git a/source3/rpc_server/srv_util.c b/source3/rpc_server/srv_util.c
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+
+/*
+ * Unix SMB/Netbios implementation.
+ * Version 1.9.
+ * RPC Pipe client / server routines
+ * Copyright (C) Andrew Tridgell 1992-1998
+ * Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
+ * Copyright (C) Paul Ashton 1997-1998.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* this module apparently provides an implementation of DCE/RPC over a
+ * named pipe (IPC$ connection using SMBtrans). details of DCE/RPC
+ * documentation are available (in on-line form) from the X-Open group.
+ *
+ * this module should provide a level of abstraction between SMB
+ * and DCE/RPC, while minimising the amount of mallocs, unnecessary
+ * data copies, and network traffic.
+ *
+ * in this version, which takes a "let's learn what's going on and
+ * get something running" approach, there is additional network
+ * traffic generated, but the code should be easier to understand...
+ *
+ * ... if you read the docs. or stare at packets for weeks on end.
+ *
+ */
+
+#include "includes.h"
+#include "nterr.h"
+
+extern int DEBUGLEVEL;
+
+/* array lookup of well-known RID aliases. the purpose of these escapes me.. */
+/* XXXX this structure should not have the well-known RID groups added to it,
+ i.e the DOMAIN_GROUP_RID_ADMIN/USER/GUEST. */
+rid_name domain_alias_rids[] =
+{
+ { DOMAIN_ALIAS_RID_ADMINS , "admins" },
+ { DOMAIN_ALIAS_RID_USERS , "users" },
+ { DOMAIN_ALIAS_RID_GUESTS , "guests" },
+ { DOMAIN_ALIAS_RID_POWER_USERS , "power_users" },
+
+ { DOMAIN_ALIAS_RID_ACCOUNT_OPS , "account_ops" },
+ { DOMAIN_ALIAS_RID_SYSTEM_OPS , "system_ops" },
+ { DOMAIN_ALIAS_RID_PRINT_OPS , "print_ops" },
+ { DOMAIN_ALIAS_RID_BACKUP_OPS , "backup_ops" },
+ { DOMAIN_ALIAS_RID_REPLICATOR , "replicator" },
+ { 0 , NULL }
+};
+
+/* array lookup of well-known Domain RID groups. */
+rid_name domain_group_rids[] =
+{
+ { DOMAIN_GROUP_RID_ADMINS , "domain admins" },
+ { DOMAIN_GROUP_RID_USERS , "domain users" },
+ { DOMAIN_GROUP_RID_GUESTS , "domain guests" },
+ { 0 , NULL }
+};
+
+
+
+int make_dom_gids(char *gids_str, DOM_GID *gids)
+{
+ char *ptr;
+ pstring s2;
+ int count;
+
+ DEBUG(4,("make_dom_gids: %s\n", gids_str));
+
+ if (gids_str == NULL || *gids_str == 0) return 0;
+
+ for (count = 0, ptr = gids_str; next_token(&ptr, s2, NULL) && count < LSA_MAX_GROUPS; count++)
+ {
+ /* the entries are of the form GID/ATTR, ATTR being optional.*/
+ char *attr;
+ uint32 rid = 0;
+ int i;
+
+ attr = strchr(s2,'/');
+ if (attr) *attr++ = 0;
+ if (!attr || !*attr) attr = "7"; /* default value for attribute is 7 */
+
+ /* look up the RID string and see if we can turn it into a rid number */
+ for (i = 0; domain_alias_rids[i].name != NULL; i++)
+ {
+ if (strequal(domain_alias_rids[i].name, s2))
+ {
+ rid = domain_alias_rids[i].rid;
+ break;
+ }
+ }
+
+ if (rid == 0) rid = atoi(s2);
+
+ if (rid == 0)
+ {
+ DEBUG(1,("make_dom_gids: unknown well-known alias RID %s/%s\n",
+ s2, attr));
+ count--;
+ }
+ else
+ {
+ gids[count].g_rid = rid;
+ gids[count].attr = atoi(attr);
+
+ DEBUG(5,("group id: %d attr: %d\n",
+ gids[count].g_rid,
+ gids[count].attr));
+ }
+ }
+
+ return count;
+}
+
+/*******************************************************************
+ gets a domain user's groups
+ ********************************************************************/
+void get_domain_user_groups(char *domain_groups, char *user)
+{
+ pstring tmp;
+
+ if (domain_groups == NULL || user == NULL) return;
+
+ /* any additional groups this user is in. e.g power users */
+ pstrcpy(domain_groups, lp_domain_groups());
+
+ /* can only be a user or a guest. cannot be guest _and_ admin */
+ if (user_in_list(user, lp_domain_guest_users()))
+ {
+ sprintf(tmp, " %ld/7 ", DOMAIN_GROUP_RID_GUESTS);
+ strcat(domain_groups, tmp);
+
+ DEBUG(3,("domain guest access %s granted\n", tmp));
+ }
+ else
+ {
+ sprintf(tmp, " %ld/7 ", DOMAIN_GROUP_RID_USERS);
+ strcat(domain_groups, tmp);
+
+ DEBUG(3,("domain user access %s granted\n", tmp));
+
+ if (user_in_list(user, lp_domain_admin_users()))
+ {
+ sprintf(tmp, " %ld/7 ", DOMAIN_GROUP_RID_ADMINS);
+ strcat(domain_groups, tmp);
+
+ DEBUG(3,("domain admin access %s granted\n", tmp));
+ }
+ }
+}
+
+
+/*******************************************************************
+ turns a DCE/RPC request into a DCE/RPC reply
+
+ this is where the data really should be split up into an array of
+ headers and data sections.
+
+ ********************************************************************/
+BOOL create_rpc_reply(pipes_struct *p,
+ uint32 data_start, uint32 data_end)
+{
+ mem_buf_init(&(p->rhdr.data), 0);
+ mem_alloc_data(p->rhdr.data, 0x18);
+
+ p->rhdr.align = 4;
+ p->rhdr.io = False;
+
+ p->hdr_rr.alloc_hint = data_end - data_start; /* calculate remaining data to be sent */
+ p->hdr.pkt_type = RPC_RESPONSE; /* mark header as an rpc response */
+
+ /* set up rpc header (fragmentation issues) */
+ if (data_start == 0)
+ {
+ p->hdr.flags = RPC_FLG_FIRST;
+ }
+ else
+ {
+ p->hdr.flags = 0;
+ }
+
+ if (p->hdr_rr.alloc_hint + 0x18 <= p->hdr_ba.bba.max_tsize)
+ {
+ p->hdr.flags |= RPC_FLG_LAST;
+ p->hdr.frag_len = p->hdr_rr.alloc_hint + 0x18;
+ }
+ else
+ {
+ p->hdr.frag_len = p->hdr_ba.bba.max_tsize;
+ }
+
+ p->rhdr.data->offset.start = 0;
+ p->rhdr.data->offset.end = 0x18;
+
+ /* store the header in the data stream */
+ p->rhdr.offset = 0;
+ smb_io_rpc_hdr ("hdr", &(p->hdr ), &(p->rhdr), 0);
+ smb_io_rpc_hdr_rr("rr" , &(p->hdr_rr), &(p->rhdr), 0);
+
+ return p->rhdr.data != NULL && p->rhdr.offset == 0x18;
+}
+
+
+/*******************************************************************
+ receives a netlogon pipe and responds.
+ ********************************************************************/
+static BOOL api_rpc_command(pipes_struct *p,
+ char *rpc_name, struct api_struct *api_rpc_cmds,
+ prs_struct *data)
+{
+ int fn_num;
+ DEBUG(4,("api_rpc_command: %s op 0x%x - ", rpc_name, p->hdr_rr.opnum));
+
+ for (fn_num = 0; api_rpc_cmds[fn_num].name; fn_num++)
+ {
+ if (api_rpc_cmds[fn_num].opnum == p->hdr_rr.opnum && api_rpc_cmds[fn_num].fn != NULL)
+ {
+ DEBUG(3,("api_rpc_command: %s\n", api_rpc_cmds[fn_num].name));
+ break;
+ }
+ }
+
+ if (api_rpc_cmds[fn_num].name == NULL)
+ {
+ DEBUG(4, ("unknown\n"));
+ return False;
+ }
+
+ /* start off with 1024 bytes, and a large safety margin too */
+ mem_buf_init(&(p->rdata.data), SAFETY_MARGIN);
+ mem_alloc_data(p->rdata.data, 1024);
+
+ p->rdata.io = False;
+ p->rdata.align = 4;
+
+ p->rdata.data->offset.start = 0;
+ p->rdata.data->offset.end = 0xffffffff;
+
+ /* do the actual command */
+ p->rdata.offset = 0;
+ api_rpc_cmds[fn_num].fn(p->uid, data, &(p->rdata));
+
+ if (p->rdata.data == NULL || p->rdata.offset == 0)
+ {
+ mem_free_data(p->rdata.data);
+ return False;
+ }
+
+ mem_realloc_data(p->rdata.data, p->rdata.offset);
+
+ DEBUG(10,("called %s\n", rpc_name));
+
+ return True;
+}
+
+
+/*******************************************************************
+ receives a netlogon pipe and responds.
+ ********************************************************************/
+BOOL api_rpcTNP(pipes_struct *p, char *rpc_name, struct api_struct *api_rpc_cmds,
+ prs_struct *data)
+{
+ if (data == NULL || data->data == NULL)
+ {
+ DEBUG(2,("%s: NULL data received\n", rpc_name));
+ return False;
+ }
+
+ /* read the rpc header */
+ smb_io_rpc_hdr_rr("", &(p->hdr_rr), data, 0);
+
+ /* interpret the command */
+ if (!api_rpc_command(p, rpc_name, api_rpc_cmds, data))
+ {
+ return False;
+ }
+
+ /* create the rpc header */
+ if (!create_rpc_reply(p, 0, p->rdata.offset))
+ {
+ return False;
+ }
+
+ /* set up the data chain */
+ p->rhdr.data->offset.start = 0;
+ p->rhdr.data->offset.end = p->rhdr.offset;
+ p->rhdr.data->next = p->rdata.data;
+
+ p->rdata.data->offset.start = p->rhdr.data->offset.end;
+ p->rdata.data->offset.end = p->rhdr.data->offset.end + p->rdata.offset;
+ p->rdata.data->next = NULL;
+
+ return True;
+}
+
+extern rid_name domain_group_rids[];
+
+/*******************************************************************
+ lookup_group_name
+ ********************************************************************/
+uint32 lookup_group_name(uint32 rid, char *group_name, uint32 *type)
+{
+ int i = 0;
+ (*type) = SID_NAME_DOM_GRP;
+
+ while (domain_group_rids[i].rid != rid && domain_group_rids[i].rid != 0)
+ {
+ i++;
+ }
+
+ if (domain_group_rids[i].rid != 0)
+ {
+ fstrcpy(group_name, domain_group_rids[i].name);
+ return 0x0;
+ }
+
+ return 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+extern rid_name domain_alias_rids[];
+
+/*******************************************************************
+ lookup_alias_name
+ ********************************************************************/
+uint32 lookup_alias_name(uint32 rid, char *alias_name, uint32 *type)
+{
+ int i = 0;
+ (*type) = SID_NAME_WKN_GRP;
+
+ while (domain_alias_rids[i].rid != rid && domain_alias_rids[i].rid != 0)
+ {
+ i++;
+ }
+
+ if (domain_alias_rids[i].rid != 0)
+ {
+ fstrcpy(alias_name, domain_alias_rids[i].name);
+ return 0x0;
+ }
+
+ return 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ lookup_user_name
+ ********************************************************************/
+uint32 lookup_user_name(uint32 rid, char *user_name, uint32 *type)
+{
+ struct smb_passwd *smb_pass;
+ (*type) = SID_NAME_USER;
+
+ /* find the user account */
+ become_root(True);
+ smb_pass = get_smbpwd_entry(NULL, rid); /* lkclXXXX SHOULD use rid mapping here! */
+ unbecome_root(True);
+
+ if (smb_pass != NULL)
+ {
+ fstrcpy(user_name, smb_pass->smb_name);
+ return 0x0;
+ }
+
+ return 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ lookup_group_rid
+ ********************************************************************/
+uint32 lookup_group_rid(char *group_name, uint32 *rid)
+{
+ char *grp_name;
+ int i = -1; /* start do loop at -1 */
+
+ do /* find, if it exists, a group rid for the group name*/
+ {
+ i++;
+ (*rid) = domain_group_rids[i].rid;
+ grp_name = domain_group_rids[i].name;
+
+ } while (grp_name != NULL && !strequal(grp_name, group_name));
+
+ return (grp_name != NULL) ? 0 : 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ lookup_alias_rid
+ ********************************************************************/
+uint32 lookup_alias_rid(char *alias_name, uint32 *rid)
+{
+ char *als_name;
+ int i = -1; /* start do loop at -1 */
+
+ do /* find, if it exists, a alias rid for the alias name*/
+ {
+ i++;
+ (*rid) = domain_alias_rids[i].rid;
+ als_name = domain_alias_rids[i].name;
+
+ } while (als_name != NULL && !strequal(als_name, alias_name));
+
+ return (als_name != NULL) ? 0 : 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ lookup_user_rid
+ ********************************************************************/
+uint32 lookup_user_rid(char *user_name, uint32 *rid)
+{
+ struct smb_passwd *smb_pass;
+ (*rid) = 0;
+
+ /* find the user account */
+ become_root(True);
+ smb_pass = get_smbpwd_entry(user_name, 0);
+ unbecome_root(True);
+
+ if (smb_pass != NULL)
+ {
+ /* lkclXXXX SHOULD use name_to_rid() here! */
+ (*rid) = smb_pass->smb_userid;
+ return 0x0;
+ }
+
+ return 0xC0000000 | NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ Group and User RID username mapping function
+ ********************************************************************/
+BOOL name_to_rid(char *user_name, uint32 *u_rid, uint32 *g_rid)
+{
+ struct passwd *pw = Get_Pwnam(user_name, False);
+
+ if (u_rid == NULL || g_rid == NULL || user_name == NULL)
+ {
+ return False;
+ }
+
+ if (!pw)
+ {
+ DEBUG(1,("Username %s is invalid on this system\n", user_name));
+ return False;
+ }
+
+ if (user_in_list(user_name, lp_domain_guest_users()))
+ {
+ *u_rid = DOMAIN_USER_RID_GUEST;
+ }
+ else if (user_in_list(user_name, lp_domain_admin_users()))
+ {
+ *u_rid = DOMAIN_USER_RID_ADMIN;
+ }
+ else
+ {
+ /* turn the unix UID into a Domain RID. this is what the posix
+ sub-system does (adds 1000 to the uid) */
+ *u_rid = (uint32)(pw->pw_uid + 1000);
+ }
+
+ /* absolutely no idea what to do about the unix GID to Domain RID mapping */
+ *g_rid = (uint32)(pw->pw_gid + 1000);
+
+ return True;
+}
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