/* Unix SMB/CIFS implementation. GUMS backends helper functions Copyright (C) Simo Sorce 2002 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. */ #include "includes.h" extern GUMS_FUNCTIONS *gums_storage; extern DOM_SID global_sid_World; extern DOM_SID global_sid_Builtin_Administrators; extern DOM_SID global_sid_Builtin_Power_Users; extern DOM_SID global_sid_Builtin_Account_Operators; extern DOM_SID global_sid_Builtin_Server_Operators; extern DOM_SID global_sid_Builtin_Print_Operators; extern DOM_SID global_sid_Builtin_Backup_Operators; extern DOM_SID global_sid_Builtin_Replicator; extern DOM_SID global_sid_Builtin_Users; extern DOM_SID global_sid_Builtin_Guests; /* defines */ #define ALLOC_CHECK(str, ptr, err, label) do { if ((ptr) == NULL) { DEBUG(0, ("%s: out of memory!\n", str)); err = NT_STATUS_NO_MEMORY; goto label; } } while(0) #define NTSTATUS_CHECK(str1, str2, err, label) do { if (NT_STATUS_IS_ERR(err)) { DEBUG(0, ("%s: %s failed!\n", str1, str2)); } } while(0) /**************************************************************************** Check if a user is a mapped group. This function will check if the group SID is mapped onto a system managed gid or onto a winbind manged sid. In the first case it will be threated like a mapped group and the backend should take the member list with a getgrgid and ignore any user that have been possibly set into the group object. In the second case, the group is a fully SAM managed group served back to the system through winbind. In this case the members of a Local group are "unrolled" to cope with the fact that unix cannot contain groups inside groups. The backend MUST never call any getgr* / getpw* function or loops with winbind may happen. ****************************************************************************/ /* NTSTATUS is_mapped_group(BOOL *mapped, const DOM_SID *sid) { NTSTATUS result; gid_t id; /* look if mapping exist, do not make idmap alloc an uid if SID is not found * / result = idmap_get_gid_from_sid(&id, sid, False); if (NT_STATUS_IS_OK(result)) { *mapped = gid_is_in_winbind_range(id); } else { *mapped = False; } return result; } */ /**************************************************************************** duplicate alloc luid_attr ****************************************************************************/ NTSTATUS dupalloc_luid_attr(TALLOC_CTX *ctx, LUID_ATTR **new_la, LUID_ATTR old_la) { *new_la = (LUID_ATTR *)talloc(ctx, sizeof(LUID_ATTR)); if (*new_la == NULL) { DEBUG(0,("dupalloc_luid_attr: could not Alloc memory to duplicate LUID_ATTR\n")); return NT_STATUS_NO_MEMORY; } (*new_la)->luid.high = old_la.luid.high; (*new_la)->luid.low = old_la.luid.low; (*new_la)->attr = old_la.attr; return NT_STATUS_OK; } /**************************************************************************** initialise a privilege list ****************************************************************************/ void init_privilege(PRIVILEGE_SET *priv_set) { priv_set->count=0; priv_set->control=0; priv_set->set=NULL; } /**************************************************************************** add a privilege to a privilege array ****************************************************************************/ NTSTATUS add_privilege(PRIVILEGE_SET *priv_set, TALLOC_CTX *ctx, LUID_ATTR set) { LUID_ATTR *new_set; /* check if the privilege is not already in the list */ if (check_priv_in_privilege(priv_set, set)) return NT_STATUS_UNSUCCESSFUL; /* we can allocate memory to add the new privilege */ new_set=(LUID_ATTR *)talloc_realloc(ctx, priv_set->set, (priv_set->count+1)*(sizeof(LUID_ATTR))); if (new_set==NULL) { DEBUG(0,("add_privilege: could not Realloc memory to add a new privilege\n")); return NT_STATUS_NO_MEMORY; } new_set[priv_set->count].luid.high=set.luid.high; new_set[priv_set->count].luid.low=set.luid.low; new_set[priv_set->count].attr=set.attr; priv_set->count++; priv_set->set=new_set; return NT_STATUS_OK; } /**************************************************************************** add all the privileges to a privilege array ****************************************************************************/ NTSTATUS add_all_privilege(PRIVILEGE_SET *priv_set, TALLOC_CTX *ctx) { NTSTATUS result = NT_STATUS_OK; LUID_ATTR set; set.attr=0; set.luid.high=0; set.luid.low=SE_PRIV_ADD_USERS; result = add_privilege(priv_set, ctx, set); NTSTATUS_CHECK("add_all_privilege", "add_privilege", result, done); set.luid.low=SE_PRIV_ADD_MACHINES; result = add_privilege(priv_set, ctx, set); NTSTATUS_CHECK("add_all_privilege", "add_privilege", result, done); set.luid.low=SE_PRIV_PRINT_OPERATOR; result = add_privilege(priv_set, ctx, set); NTSTATUS_CHECK("add_all_privilege", "add_privilege", result, done); done: return result; } /**************************************************************************** check if the privilege list is empty ****************************************************************************/ BOOL check_empty_privilege(PRIVILEGE_SET *priv_set) { return (priv_set->count == 0); } /**************************************************************************** check if the privilege is in the privilege list ****************************************************************************/ BOOL check_priv_in_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set) { int i; /* if the list is empty, obviously we can't have it */ if (check_empty_privilege(priv_set)) return False; for (i=0; i<priv_set->count; i++) { LUID_ATTR *cur_set; cur_set=&priv_set->set[i]; /* check only the low and high part. Checking the attr field has no meaning */ if( (cur_set->luid.low==set.luid.low) && (cur_set->luid.high==set.luid.high) ) return True; } return False; } /**************************************************************************** remove a privilege from a privilege array ****************************************************************************/ NTSTATUS remove_privilege(PRIVILEGE_SET *priv_set, TALLOC_CTX *ctx, LUID_ATTR set) { LUID_ATTR *new_set; LUID_ATTR *old_set; int i,j; /* check if the privilege is in the list */ if (!check_priv_in_privilege(priv_set, set)) return NT_STATUS_UNSUCCESSFUL; /* special case if it's the only privilege in the list */ if (priv_set->count==1) { init_privilege(priv_set); return NT_STATUS_OK; } /* * the privilege is there, create a new list, * and copy the other privileges */ old_set = priv_set->set; new_set=(LUID_ATTR *)talloc(ctx, (priv_set->count - 1) * (sizeof(LUID_ATTR))); if (new_set==NULL) { DEBUG(0,("remove_privilege: could not malloc memory for new privilege list\n")); return NT_STATUS_NO_MEMORY; } for (i=0, j=0; i<priv_set->count; i++) { if ((old_set[i].luid.low == set.luid.low) && (old_set[i].luid.high == set.luid.high)) { continue; } new_set[j].luid.low = old_set[i].luid.low; new_set[j].luid.high = old_set[i].luid.high; new_set[j].attr = old_set[i].attr; j++; } if (j != priv_set->count - 1) { DEBUG(0,("remove_privilege: mismatch ! difference is not -1\n")); DEBUGADD(0,("old count:%d, new count:%d\n", priv_set->count, j)); return NT_STATUS_INTERNAL_ERROR; } /* ok everything is fine */ priv_set->count--; priv_set->set=new_set; return NT_STATUS_OK; } /**************************************************************************** duplicates a privilege array ****************************************************************************/ NTSTATUS dup_priv_set(PRIVILEGE_SET **new_priv_set, TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set) { LUID_ATTR *new_set; LUID_ATTR *old_set; int i; *new_priv_set = (PRIVILEGE_SET *)talloc(mem_ctx, sizeof(PRIVILEGE_SET)); init_privilege(*new_priv_set); /* special case if there are no privileges in the list */ if (priv_set->count == 0) { return NT_STATUS_OK; } /* * create a new list, * and copy the other privileges */ old_set = priv_set->set; new_set = (LUID_ATTR *)talloc(mem_ctx, (priv_set->count - 1) * (sizeof(LUID_ATTR))); if (new_set==NULL) { DEBUG(0,("remove_privilege: could not malloc memory for new privilege list\n")); return NT_STATUS_NO_MEMORY; } for (i=0; i < priv_set->count; i++) { new_set[i].luid.low = old_set[i].luid.low; new_set[i].luid.high = old_set[i].luid.high; new_set[i].attr = old_set[i].attr; } (*new_priv_set)->count = priv_set->count; (*new_priv_set)->control = priv_set->control; (*new_priv_set)->set = new_set; return NT_STATUS_OK; } #define ALIAS_DEFAULT_SACL_SA_RIGHTS 0x01050013 #define ALIAS_DEFAULT_DACL_SA_RIGHTS \ (READ_CONTROL_ACCESS | \ SA_RIGHT_ALIAS_LOOKUP_INFO | \ SA_RIGHT_ALIAS_GET_MEMBERS) /* 0x0002000c */ #define ALIAS_DEFAULT_SACL_SEC_ACE_FLAG (SEC_ACE_FLAG_FAILED_ACCESS | SEC_ACE_FLAG_SUCCESSFUL_ACCESS) /* 0xc0 */ NTSTATUS create_builtin_alias_default_sec_desc(SEC_DESC **sec_desc, TALLOC_CTX *ctx) { DOM_SID *world = &global_sid_World; DOM_SID *admins = &global_sid_Builtin_Administrators; SEC_ACCESS sa; SEC_ACE sacl_ace; SEC_ACE dacl_aces[2]; SEC_ACL *sacl = NULL; SEC_ACL *dacl = NULL; size_t psize; init_sec_access(&sa, ALIAS_DEFAULT_SACL_SA_RIGHTS); init_sec_ace(&sacl_ace, world, SEC_ACE_TYPE_SYSTEM_AUDIT, sa, ALIAS_DEFAULT_SACL_SEC_ACE_FLAG); sacl = make_sec_acl(ctx, NT4_ACL_REVISION, 1, &sacl_ace); if (!sacl) { DEBUG(0, ("build_init_sec_desc: Failed to make SEC_ACL.\n")); return NT_STATUS_NO_MEMORY; } init_sec_access(&sa, ALIAS_DEFAULT_DACL_SA_RIGHTS); init_sec_ace(&(dacl_aces[0]), world, SEC_ACE_TYPE_ACCESS_ALLOWED, sa, 0); init_sec_access(&sa, SA_RIGHT_ALIAS_ALL_ACCESS); init_sec_ace(&(dacl_aces[1]), admins, SEC_ACE_TYPE_ACCESS_ALLOWED, sa, 0); dacl = make_sec_acl(ctx, NT4_ACL_REVISION, 2, dacl_aces); if (!sacl) { DEBUG(0, ("build_init_sec_desc: Failed to make SEC_ACL.\n")); return NT_STATUS_NO_MEMORY; } *sec_desc = make_sec_desc(ctx, SEC_DESC_REVISION, admins, admins, sacl, dacl, &psize); if (!(*sec_desc)) { DEBUG(0,("get_share_security: Failed to make SEC_DESC.\n")); return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } NTSTATUS sec_desc_add_ace_to_dacl(SEC_DESC *sec_desc, TALLOC_CTX *ctx, DOM_SID *sid, uint32 mask) { NTSTATUS result; SEC_ACE *new_aces; unsigned num_aces; int i; num_aces = sec_desc->dacl->num_aces + 1; result = sec_ace_add_sid(ctx, &new_aces, sec_desc->dacl->ace, &num_aces, sid, mask); if (NT_STATUS_IS_OK(result)) { sec_desc->dacl->ace = new_aces; sec_desc->dacl->num_aces = num_aces; sec_desc->dacl->size = SEC_ACL_HEADER_SIZE; for (i = 0; i < num_aces; i++) { sec_desc->dacl->size += sec_desc->dacl->ace[i].size; } } return result; } NTSTATUS gums_init_builtin_groups(void) { NTSTATUS result; GUMS_OBJECT g_obj; GUMS_GROUP *g_grp; GUMS_PRIVILEGE g_priv; /* Build the well known Builtin Local Groups */ g_obj.type = GUMS_OBJ_GROUP; g_obj.version = 1; g_obj.seq_num = 0; g_obj.mem_ctx = talloc_init_named("gums_init_backend_acct"); if (g_obj.mem_ctx == NULL) { DEBUG(0, ("gums_init_backend: Out of Memory!\n")); return NT_STATUS_NO_MEMORY; } /* Administrators */ /* alloc group structure */ g_obj.data = (void *)talloc(g_obj.mem_ctx, sizeof(GUMS_OBJ_GROUP)); ALLOC_CHECK("gums_init_backend", g_obj.data, result, done); /* make admins sid */ g_grp = (GUMS_GROUP *)g_obj.data; sid_copy(g_obj.sid, &global_sid_Builtin_Administrators); /* make security descriptor */ result = create_builtin_alias_default_sec_desc(&(g_obj.sec_desc), g_obj.mem_ctx); NTSTATUS_CHECK("gums_init_backend", "create_builtin_alias_default_sec_desc", result, done); /* make privilege set */ /* From BDC join trace: SeSecurityPrivilege SeBackupPrivilege SeRestorePrivilege SeSystemtimePrivilege SeShutdownPrivilege SeRemoteShutdownPrivilege SeTakeOwnershipPrivilege SeDebugPrivilege SeSystemEnvironmentPrivilege SeSystemProfilePrivilege SeProfileSingleProcessPrivilege SeIncreaseBasePriorityPrivilege SeLocalDriverPrivilege SeCreatePagefilePrivilege SeIncreaseQuotaPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Administrators"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Members can fully administer the computer/domain"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* numebr of group members */ g_grp->count = 0; g_grp->members = NULL; /* store Administrators group */ result = gums_storage->set_object(&g_obj); /* Power Users */ /* Domain Controllers Does NOT have power Users */ sid_copy(g_obj.sid, &global_sid_Builtin_Power_Users); /* make privilege set */ /* SE_PRIV_??? */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Power Users"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ /* > */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Power Users"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Power Users group */ result = gums_storage->set_object(&g_obj); /* Account Operators */ sid_copy(g_obj.sid, &global_sid_Builtin_Account_Operators); /* make privilege set */ /* From BDC join trace: SeShutdownPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Account Operators"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Members can administer domain user and group accounts"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Account Operators group */ result = gums_storage->set_object(&g_obj); /* Server Operators */ sid_copy(g_obj.sid, &global_sid_Builtin_Server_Operators); /* make privilege set */ /* From BDC join trace: SeBackupPrivilege SeRestorePrivilege SeSystemtimePrivilege SeShutdownPrivilege SeRemoteShutdownPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Server Operators"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Members can administer domain servers"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Server Operators group */ result = gums_storage->set_object(&g_obj); /* Print Operators */ sid_copy(g_obj.sid, &global_sid_Builtin_Print_Operators); /* make privilege set */ /* From BDC join trace: SeShutdownPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Print Operators"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Members can administer domain printers"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Print Operators group */ result = gums_storage->set_object(&g_obj); /* Backup Operators */ sid_copy(g_obj.sid, &global_sid_Builtin_Backup_Operators); /* make privilege set */ /* From BDC join trace: SeBackupPrivilege SeRestorePrivilege SeShutdownPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Backup Operators"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Members can bypass file security to backup files"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Backup Operators group */ result = gums_storage->set_object(&g_obj); /* Replicator */ sid_copy(g_obj.sid, &global_sid_Builtin_Replicator); /* make privilege set */ /* From BDC join trace: SeBackupPrivilege SeRestorePrivilege SeShutdownPrivilege */ /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Replicator"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Supports file replication in a domain"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Replicator group */ result = gums_storage->set_object(&g_obj); /* Users */ sid_copy(g_obj.sid, &global_sid_Builtin_Users); /* add ACE to sec dsec dacl */ sec_desc_add_ace_to_dacl(g_obj.sec_desc, g_obj.mem_ctx, &global_sid_Builtin_Account_Operators, ALIAS_DEFAULT_DACL_SA_RIGHTS); sec_desc_add_ace_to_dacl(g_obj.sec_desc, g_obj.mem_ctx, &global_sid_Builtin_Power_Users, ALIAS_DEFAULT_DACL_SA_RIGHTS); /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Users"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Ordinary users"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Users group */ result = gums_storage->set_object(&g_obj); /* Guests */ sid_copy(g_obj.sid, &global_sid_Builtin_Guests); /* set name */ g_obj.name = talloc_strdup(g_obj.mem_ctx, "Guests"); ALLOC_CHECK("gums_init_backend", g_obj.name, result, done); /* set description */ g_obj.description = talloc_strdup(g_obj.mem_ctx, "Users granted guest access to the computer/domain"); ALLOC_CHECK("gums_init_backend", g_obj.description, result, done); /* store Guests group */ result = gums_storage->set_object(&g_obj); /* set default privileges */ g_priv.type = GUMS_OBJ_GROUP; g_priv.version = 1; g_priv.seq_num = 0; g_priv.mem_ctx = talloc_init_named("gums_init_backend_priv"); if (g_priv.mem_ctx == NULL) { DEBUG(0, ("gums_init_backend: Out of Memory!\n")); return NT_STATUS_NO_MEMORY; } done: talloc_destroy(g_obj.mem_ctx); talloc_destroy(g_priv.mem_ctx); return result; }