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-rw-r--r--source4/rpc_server/srv_util.c546
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diff --git a/source4/rpc_server/srv_util.c b/source4/rpc_server/srv_util.c
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+++ b/source4/rpc_server/srv_util.c
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+/*
+ * Unix SMB/CIFS implementation.
+ * 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"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_SRV
+
+/*
+ * A list of the rids of well known BUILTIN and Domain users
+ * and groups.
+ */
+
+rid_name builtin_alias_rids[] =
+{
+ { BUILTIN_ALIAS_RID_ADMINS , "Administrators" },
+ { BUILTIN_ALIAS_RID_USERS , "Users" },
+ { BUILTIN_ALIAS_RID_GUESTS , "Guests" },
+ { BUILTIN_ALIAS_RID_POWER_USERS , "Power Users" },
+
+ { BUILTIN_ALIAS_RID_ACCOUNT_OPS , "Account Operators" },
+ { BUILTIN_ALIAS_RID_SYSTEM_OPS , "System Operators" },
+ { BUILTIN_ALIAS_RID_PRINT_OPS , "Print Operators" },
+ { BUILTIN_ALIAS_RID_BACKUP_OPS , "Backup Operators" },
+ { BUILTIN_ALIAS_RID_REPLICATOR , "Replicator" },
+ { 0 , NULL }
+};
+
+/* array lookup of well-known Domain RID users. */
+rid_name domain_user_rids[] =
+{
+ { DOMAIN_USER_RID_ADMIN , "Administrator" },
+ { DOMAIN_USER_RID_GUEST , "Guest" },
+ { 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 }
+};
+
+/*******************************************************************
+ gets a domain user's groups
+ ********************************************************************/
+NTSTATUS get_alias_user_groups(TALLOC_CTX *ctx, DOM_SID *sid, int *numgroups, uint32 **prids, DOM_SID *q_sid)
+{
+ SAM_ACCOUNT *sam_pass=NULL;
+ int i, cur_rid=0;
+ gid_t gid;
+ gid_t *groups = NULL;
+ int num_groups;
+ GROUP_MAP map;
+ DOM_SID tmp_sid;
+ fstring user_name;
+ fstring str_domsid, str_qsid;
+ uint32 rid,grid;
+ uint32 *rids=NULL, *new_rids=NULL;
+ gid_t winbind_gid_low, winbind_gid_high;
+ BOOL ret;
+ BOOL winbind_groups_exist;
+
+ /*
+ * this code is far from perfect.
+ * first it enumerates the full /etc/group and that can be slow.
+ * second, it works only with users' SIDs
+ * whereas the day we support nested groups, it will have to
+ * support both users's SIDs and domain groups' SIDs
+ *
+ * having our own ldap backend would be so much faster !
+ * we're far from that, but hope one day ;-) JFM.
+ */
+
+ *prids=NULL;
+ *numgroups=0;
+
+ winbind_groups_exist = lp_winbind_gid(&winbind_gid_low, &winbind_gid_high);
+
+
+ DEBUG(10,("get_alias_user_groups: looking if SID %s is a member of groups in the SID domain %s\n",
+ sid_to_string(str_qsid, q_sid), sid_to_string(str_domsid, sid)));
+
+ pdb_init_sam(&sam_pass);
+ become_root();
+ ret = pdb_getsampwsid(sam_pass, q_sid);
+ unbecome_root();
+ if (ret == False) {
+ pdb_free_sam(&sam_pass);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ fstrcpy(user_name, pdb_get_username(sam_pass));
+ grid=pdb_get_group_rid(sam_pass);
+ gid=pdb_get_gid(sam_pass);
+
+ become_root();
+ /* on some systems this must run as root */
+ num_groups = getgroups_user(user_name, &groups);
+ unbecome_root();
+ if (num_groups == -1) {
+ /* this should never happen */
+ DEBUG(2,("get_alias_user_groups: getgroups_user failed\n"));
+ pdb_free_sam(&sam_pass);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ for (i=0;i<num_groups;i++) {
+ if(!get_group_from_gid(groups[i], &map, MAPPING_WITHOUT_PRIV)) {
+ DEBUG(10,("get_alias_user_groups: gid %d. not found\n", (int)groups[i]));
+ continue;
+ }
+
+ /* if it's not an alias, continue */
+ if (map.sid_name_use!=SID_NAME_ALIAS) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not an ALIAS group.\n", map.nt_name));
+ continue;
+ }
+
+ sid_copy(&tmp_sid, &map.sid);
+ sid_split_rid(&tmp_sid, &rid);
+
+ /* if the sid is not in the correct domain, continue */
+ if (!sid_equal(&tmp_sid, sid)) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not in the domain SID.\n", map.nt_name));
+ continue;
+ }
+
+ /* Don't return winbind groups as they are not local! */
+ if (winbind_groups_exist && (groups[i] >= winbind_gid_low) && (groups[i] <= winbind_gid_high)) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not local.\n", map.nt_name));
+ continue;
+ }
+
+ /* Don't return user private groups... */
+ if (Get_Pwnam(map.nt_name) != 0) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, clashes with user.\n", map.nt_name));
+ continue;
+ }
+
+ new_rids=(uint32 *)Realloc(rids, sizeof(uint32)*(cur_rid+1));
+ if (new_rids==NULL) {
+ DEBUG(10,("get_alias_user_groups: could not realloc memory\n"));
+ pdb_free_sam(&sam_pass);
+ free(groups);
+ return NT_STATUS_NO_MEMORY;
+ }
+ rids=new_rids;
+
+ sid_peek_rid(&map.sid, &(rids[cur_rid]));
+ cur_rid++;
+ break;
+ }
+
+ free(groups);
+
+ /* now check for the user's gid (the primary group rid) */
+ for (i=0; i<cur_rid && grid!=rids[i]; i++)
+ ;
+
+ /* the user's gid is already there */
+ if (i!=cur_rid) {
+ DEBUG(10,("get_alias_user_groups: user is already in the list. good.\n"));
+ goto done;
+ }
+
+ DEBUG(10,("get_alias_user_groups: looking for gid %d of user %s\n", (int)gid, user_name));
+
+ if(!get_group_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
+ DEBUG(0,("get_alias_user_groups: gid of user %s doesn't exist. Check your /etc/passwd and /etc/group files\n", user_name));
+ goto done;
+ }
+
+ /* the primary group isn't an alias */
+ if (map.sid_name_use!=SID_NAME_ALIAS) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not an ALIAS group.\n", map.nt_name));
+ goto done;
+ }
+
+ sid_copy(&tmp_sid, &map.sid);
+ sid_split_rid(&tmp_sid, &rid);
+
+ /* if the sid is not in the correct domain, continue */
+ if (!sid_equal(&tmp_sid, sid)) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not in the domain SID.\n", map.nt_name));
+ goto done;
+ }
+
+ /* Don't return winbind groups as they are not local! */
+ if (winbind_groups_exist && (gid >= winbind_gid_low) && (gid <= winbind_gid_high)) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, not local.\n", map.nt_name ));
+ goto done;
+ }
+
+ /* Don't return user private groups... */
+ if (Get_Pwnam(map.nt_name) != 0) {
+ DEBUG(10,("get_alias_user_groups: not returing %s, clashes with user.\n", map.nt_name ));
+ goto done;
+ }
+
+ new_rids=(uint32 *)Realloc(rids, sizeof(uint32)*(cur_rid+1));
+ if (new_rids==NULL) {
+ DEBUG(10,("get_alias_user_groups: could not realloc memory\n"));
+ pdb_free_sam(&sam_pass);
+ return NT_STATUS_NO_MEMORY;
+ }
+ rids=new_rids;
+
+ sid_peek_rid(&map.sid, &(rids[cur_rid]));
+ cur_rid++;
+
+done:
+ *prids=rids;
+ *numgroups=cur_rid;
+ pdb_free_sam(&sam_pass);
+
+ return NT_STATUS_OK;
+}
+
+
+/*******************************************************************
+ gets a domain user's groups
+ ********************************************************************/
+BOOL get_domain_user_groups(TALLOC_CTX *ctx, int *numgroups, DOM_GID **pgids, SAM_ACCOUNT *sam_pass)
+{
+ GROUP_MAP *map=NULL;
+ int i, num, num_entries, cur_gid=0;
+ struct group *grp;
+ DOM_GID *gids;
+ fstring user_name;
+ uint32 grid;
+ uint32 tmp_rid;
+
+ *numgroups= 0;
+
+ fstrcpy(user_name, pdb_get_username(sam_pass));
+ grid=pdb_get_group_rid(sam_pass);
+
+ DEBUG(10,("get_domain_user_groups: searching domain groups [%s] is a member of\n", user_name));
+
+ /* first get the list of the domain groups */
+ if (!pdb_enum_group_mapping(SID_NAME_DOM_GRP, &map, &num_entries, ENUM_ONLY_MAPPED, MAPPING_WITHOUT_PRIV))
+ return False;
+ DEBUG(10,("get_domain_user_groups: there are %d mapped groups\n", num_entries));
+
+ /*
+ * alloc memory. In the worse case, we alloc memory for nothing.
+ * but I prefer to alloc for nothing
+ * than reallocing everytime.
+ */
+ gids = (DOM_GID *)talloc(ctx, sizeof(DOM_GID) * num_entries);
+
+ /* for each group, check if the user is a member of*/
+ for(i=0; i<num_entries; i++) {
+ if ((grp=getgrgid(map[i].gid)) == NULL) {
+ /* very weird !!! */
+ DEBUG(5,("get_domain_user_groups: gid %d doesn't exist anymore !\n", (int)map[i].gid));
+ continue;
+ }
+
+ for(num=0; grp->gr_mem[num]!=NULL; num++) {
+ if(strcmp(grp->gr_mem[num], user_name)==0) {
+ /* we found the user, add the group to the list */
+ sid_peek_rid(&map[i].sid, &(gids[cur_gid].g_rid));
+ gids[cur_gid].attr=7;
+ DEBUG(10,("get_domain_user_groups: user found in group %s\n", map[i].nt_name));
+ cur_gid++;
+ break;
+ }
+ }
+ }
+
+ /* we have checked the groups */
+ /* we must now check the gid of the user or the primary group rid, that's the same */
+ for (i=0; i<cur_gid && grid!=gids[i].g_rid; i++)
+ ;
+
+ /* the user's gid is already there */
+ if (i!=cur_gid) {
+ /*
+ * the primary group of the user but be the first one in the list
+ * don't ask ! JFM.
+ */
+ gids[i].g_rid=gids[0].g_rid;
+ gids[0].g_rid=grid;
+ goto done;
+ }
+
+ for(i=0; i<num_entries; i++) {
+ sid_peek_rid(&map[i].sid, &tmp_rid);
+ if (tmp_rid==grid) {
+ /*
+ * the primary group of the user but be the first one in the list
+ * don't ask ! JFM.
+ */
+ gids[cur_gid].g_rid=gids[0].g_rid;
+ gids[0].g_rid=tmp_rid;
+ gids[cur_gid].attr=7;
+ DEBUG(10,("get_domain_user_groups: primary gid of user found in group %s\n", map[i].nt_name));
+ cur_gid++;
+ goto done; /* leave the loop early */
+ }
+ }
+
+ DEBUG(0,("get_domain_user_groups: primary gid of user [%s] is not a Domain group !\n", user_name));
+ DEBUGADD(0,("get_domain_user_groups: You should fix it, NT doesn't like that\n"));
+
+
+ done:
+ *pgids=gids;
+ *numgroups=cur_gid;
+ safe_free(map);
+
+ return True;
+}
+
+/*******************************************************************
+ gets a domain user's groups from their already-calculated NT_USER_TOKEN
+ ********************************************************************/
+NTSTATUS nt_token_to_group_list(TALLOC_CTX *mem_ctx, const DOM_SID *domain_sid,
+ const NT_USER_TOKEN *nt_token,
+ int *numgroups, DOM_GID **pgids)
+{
+ DOM_GID *gids;
+ int i;
+
+ gids = (DOM_GID *)talloc(mem_ctx, sizeof(*gids) * nt_token->num_sids);
+
+ if (!gids) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ *numgroups=0;
+
+ for (i=PRIMARY_GROUP_SID_INDEX; i < nt_token->num_sids; i++) {
+ if (sid_compare_domain(domain_sid, &nt_token->user_sids[i])==0) {
+ sid_peek_rid(&nt_token->user_sids[i], &(gids[*numgroups].g_rid));
+ gids[*numgroups].attr=7;
+ (*numgroups)++;
+ }
+ }
+ *pgids = gids;
+ return NT_STATUS_OK;
+}
+
+/*******************************************************************
+ Look up a local (domain) rid and return a name and type.
+ ********************************************************************/
+NTSTATUS local_lookup_group_name(uint32 rid, char *group_name, uint32 *type)
+{
+ int i = 0;
+ (*type) = SID_NAME_DOM_GRP;
+
+ DEBUG(5,("lookup_group_name: rid: %d", rid));
+
+ 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);
+ DEBUG(5,(" = %s\n", group_name));
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(5,(" none mapped\n"));
+ return NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ Look up a local alias rid and return a name and type.
+ ********************************************************************/
+NTSTATUS local_lookup_alias_name(uint32 rid, char *alias_name, uint32 *type)
+{
+ int i = 0;
+ (*type) = SID_NAME_WKN_GRP;
+
+ DEBUG(5,("lookup_alias_name: rid: %d", rid));
+
+ while (builtin_alias_rids[i].rid != rid && builtin_alias_rids[i].rid != 0)
+ {
+ i++;
+ }
+
+ if (builtin_alias_rids[i].rid != 0)
+ {
+ fstrcpy(alias_name, builtin_alias_rids[i].name);
+ DEBUG(5,(" = %s\n", alias_name));
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(5,(" none mapped\n"));
+ return NT_STATUS_NONE_MAPPED;
+}
+
+
+#if 0 /*Nobody uses this function just now*/
+/*******************************************************************
+ Look up a local user rid and return a name and type.
+ ********************************************************************/
+NTSTATUS local_lookup_user_name(uint32 rid, char *user_name, uint32 *type)
+{
+ SAM_ACCOUNT *sampwd=NULL;
+ int i = 0;
+ BOOL ret;
+
+ (*type) = SID_NAME_USER;
+
+ DEBUG(5,("lookup_user_name: rid: %d", rid));
+
+ /* look up the well-known domain user rids first */
+ while (domain_user_rids[i].rid != rid && domain_user_rids[i].rid != 0)
+ {
+ i++;
+ }
+
+ if (domain_user_rids[i].rid != 0) {
+ fstrcpy(user_name, domain_user_rids[i].name);
+ DEBUG(5,(" = %s\n", user_name));
+ return NT_STATUS_OK;
+ }
+
+ pdb_init_sam(&sampwd);
+
+ /* ok, it's a user. find the user account */
+ become_root();
+ ret = pdb_getsampwrid(sampwd, rid);
+ unbecome_root();
+
+ if (ret == True) {
+ fstrcpy(user_name, pdb_get_username(sampwd) );
+ DEBUG(5,(" = %s\n", user_name));
+ pdb_free_sam(&sampwd);
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(5,(" none mapped\n"));
+ pdb_free_sam(&sampwd);
+ return NT_STATUS_NONE_MAPPED;
+}
+
+#endif
+
+/*******************************************************************
+ Look up a local (domain) group name and return a rid
+ ********************************************************************/
+NTSTATUS local_lookup_group_rid(char *group_name, uint32 *rid)
+{
+ const 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) ? NT_STATUS_OK : NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ Look up a local (BUILTIN) alias name and return a rid
+ ********************************************************************/
+NTSTATUS local_lookup_alias_rid(const char *alias_name, uint32 *rid)
+{
+ const 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) = builtin_alias_rids[i].rid;
+ als_name = builtin_alias_rids[i].name;
+
+ } while (als_name != NULL && !strequal(als_name, alias_name));
+
+ return (als_name != NULL) ? NT_STATUS_OK : NT_STATUS_NONE_MAPPED;
+}
+
+/*******************************************************************
+ Look up a local user name and return a rid
+ ********************************************************************/
+NTSTATUS local_lookup_user_rid(char *user_name, uint32 *rid)
+{
+ SAM_ACCOUNT *sampass=NULL;
+ BOOL ret;
+
+ (*rid) = 0;
+
+ pdb_init_sam(&sampass);
+
+ /* find the user account */
+ become_root();
+ ret = pdb_getsampwnam(sampass, user_name);
+ unbecome_root();
+
+ if (ret == True) {
+ (*rid) = pdb_get_user_rid(sampass);
+ pdb_free_sam(&sampass);
+ return NT_STATUS_OK;
+ }
+
+ pdb_free_sam(&sampass);
+ return NT_STATUS_NONE_MAPPED;
+}