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Diffstat (limited to '')
| -rw-r--r-- | libcli/security/privileges.c | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/libcli/security/privileges.c b/libcli/security/privileges.c new file mode 100644 index 0000000..33debdc --- /dev/null +++ b/libcli/security/privileges.c @@ -0,0 +1,498 @@ +/* + Unix SMB/CIFS implementation. + Privileges handling functions + Copyright (C) Jean François Micouleau 1998-2001 + Copyright (C) Simo Sorce 2002-2003 + Copyright (C) Gerald (Jerry) Carter 2005 + Copyright (C) Michael Adam 2007 + Copyright (C) Andrew Bartlett 2010 + Copyright (C) Andrew Tridgell 2004 + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Basic privileges functions (mask-operations and conversion + * functions between the different formats (se_priv, privset, luid) + * moved here * from lib/privileges.c to minimize linker deps. + * + * generally SID- and LUID-related code is left in lib/privileges.c + * + * some extra functions to hide privs array from lib/privileges.c + */ + +#include "replace.h" +#include "libcli/security/privileges.h" +#include "libcli/security/privileges_private.h" +#include "librpc/gen_ndr/security.h" +#include "lib/util/samba_util.h" +#include "lib/util/debug.h" + +/* The use of strcasecmp here is safe, all the comparison strings are ASCII */ +#undef strcasecmp + +#define NUM_SHORT_LIST_PRIVS 9 + +static const struct { + enum sec_privilege luid; + uint64_t privilege_mask; + const char *name; + const char *description; +} privs[] = { + + {SEC_PRIV_MACHINE_ACCOUNT, SEC_PRIV_MACHINE_ACCOUNT_BIT, "SeMachineAccountPrivilege", "Add machines to domain"}, + {SEC_PRIV_TAKE_OWNERSHIP, SEC_PRIV_TAKE_OWNERSHIP_BIT, "SeTakeOwnershipPrivilege", "Take ownership of files or other objects"}, + {SEC_PRIV_BACKUP, SEC_PRIV_BACKUP_BIT, "SeBackupPrivilege", "Back up files and directories"}, + {SEC_PRIV_RESTORE, SEC_PRIV_RESTORE_BIT, "SeRestorePrivilege", "Restore files and directories"}, + {SEC_PRIV_REMOTE_SHUTDOWN, SEC_PRIV_REMOTE_SHUTDOWN_BIT, "SeRemoteShutdownPrivilege", "Force shutdown from a remote system"}, + + {SEC_PRIV_PRINT_OPERATOR, SEC_PRIV_PRINT_OPERATOR_BIT, "SePrintOperatorPrivilege", "Manage printers"}, + {SEC_PRIV_ADD_USERS, SEC_PRIV_ADD_USERS_BIT, "SeAddUsersPrivilege", "Add users and groups to the domain"}, + {SEC_PRIV_DISK_OPERATOR, SEC_PRIV_DISK_OPERATOR_BIT, "SeDiskOperatorPrivilege", "Manage disk shares"}, + {SEC_PRIV_SECURITY, SEC_PRIV_SECURITY_BIT, "SeSecurityPrivilege", "System security"}, + + + /* The list from here on is not displayed in the code from + * source3, and is after index NUM_SHORT_LIST_PRIVS for that + * reason */ + + {SEC_PRIV_SYSTEMTIME, + SEC_PRIV_SYSTEMTIME_BIT, + "SeSystemtimePrivilege", + "Set the system clock"}, + + {SEC_PRIV_SHUTDOWN, + SEC_PRIV_SHUTDOWN_BIT, + "SeShutdownPrivilege", + "Shutdown the system"}, + + {SEC_PRIV_DEBUG, + SEC_PRIV_DEBUG_BIT, + "SeDebugPrivilege", + "Debug processes"}, + + {SEC_PRIV_SYSTEM_ENVIRONMENT, + SEC_PRIV_SYSTEM_ENVIRONMENT_BIT, + "SeSystemEnvironmentPrivilege", + "Modify system environment"}, + + {SEC_PRIV_SYSTEM_PROFILE, + SEC_PRIV_SYSTEM_PROFILE_BIT, + "SeSystemProfilePrivilege", + "Profile the system"}, + + {SEC_PRIV_PROFILE_SINGLE_PROCESS, + SEC_PRIV_PROFILE_SINGLE_PROCESS_BIT, + "SeProfileSingleProcessPrivilege", + "Profile one process"}, + + {SEC_PRIV_INCREASE_BASE_PRIORITY, + SEC_PRIV_INCREASE_BASE_PRIORITY_BIT, + "SeIncreaseBasePriorityPrivilege", + "Increase base priority"}, + + {SEC_PRIV_LOAD_DRIVER, + SEC_PRIV_LOAD_DRIVER_BIT, + "SeLoadDriverPrivilege", + "Load drivers"}, + + {SEC_PRIV_CREATE_PAGEFILE, + SEC_PRIV_CREATE_PAGEFILE_BIT, + "SeCreatePagefilePrivilege", + "Create page files"}, + + {SEC_PRIV_INCREASE_QUOTA, + SEC_PRIV_INCREASE_QUOTA_BIT, + "SeIncreaseQuotaPrivilege", + "Increase quota"}, + + {SEC_PRIV_CHANGE_NOTIFY, + SEC_PRIV_CHANGE_NOTIFY_BIT, + "SeChangeNotifyPrivilege", + "Register for change notify"}, + + {SEC_PRIV_UNDOCK, + SEC_PRIV_UNDOCK_BIT, + "SeUndockPrivilege", + "Undock devices"}, + + {SEC_PRIV_MANAGE_VOLUME, + SEC_PRIV_MANAGE_VOLUME_BIT, + "SeManageVolumePrivilege", + "Manage system volumes"}, + + {SEC_PRIV_IMPERSONATE, + SEC_PRIV_IMPERSONATE_BIT, + "SeImpersonatePrivilege", + "Impersonate users"}, + + {SEC_PRIV_CREATE_GLOBAL, + SEC_PRIV_CREATE_GLOBAL_BIT, + "SeCreateGlobalPrivilege", + "Create global"}, + + {SEC_PRIV_ENABLE_DELEGATION, + SEC_PRIV_ENABLE_DELEGATION_BIT, + "SeEnableDelegationPrivilege", + "Enable Delegation"}, +}; + +/* These are rights, not privileges, and should not be confused. The + * names are very similar, and they are quite similar in behaviour, + * but they are not to be enumerated as a system-wide list or have an + * LUID value */ +static const struct { + uint32_t right_mask; + const char *name; + const char *description; +} rights[] = { + {LSA_POLICY_MODE_INTERACTIVE, + "SeInteractiveLogonRight", + "Interactive logon"}, + + {LSA_POLICY_MODE_NETWORK, + "SeNetworkLogonRight", + "Network logon"}, + + {LSA_POLICY_MODE_REMOTE_INTERACTIVE, + "SeRemoteInteractiveLogonRight", + "Remote Interactive logon"} +}; + +/* + return a privilege mask given a privilege id +*/ +uint64_t sec_privilege_mask(enum sec_privilege privilege) +{ + size_t i; + for (i=0;i<ARRAY_SIZE(privs);i++) { + if (privs[i].luid == privilege) { + return privs[i].privilege_mask; + } + } + + return 0; +} + +/*************************************************************************** + put all valid privileges into a mask +****************************************************************************/ + +void se_priv_put_all_privileges(uint64_t *privilege_mask) +{ + size_t i; + + *privilege_mask = 0; + for ( i=0; i<ARRAY_SIZE(privs); i++ ) { + *privilege_mask |= privs[i].privilege_mask; + } +} + +/********************************************************************* + Lookup the uint64_t bitmask value for a privilege name +*********************************************************************/ + +bool se_priv_from_name( const char *name, uint64_t *privilege_mask ) +{ + size_t i; + for ( i=0; i<ARRAY_SIZE(privs); i++ ) { + if ( strequal( privs[i].name, name ) ) { + *privilege_mask = privs[i].privilege_mask; + return true; + } + } + + return false; +} + +const char* get_privilege_dispname( const char *name ) +{ + size_t i; + + if (!name) { + return NULL; + } + + for ( i=0; i<ARRAY_SIZE(privs); i++ ) { + if ( strequal( privs[i].name, name ) ) { + return privs[i].description; + } + } + + return NULL; +} + +/******************************************************************* + return the number of elements in the 'short' privilege array (traditional source3 behaviour) +*******************************************************************/ + +int num_privileges_in_short_list( void ) +{ + return NUM_SHORT_LIST_PRIVS; +} + +/**************************************************************************** + add a privilege to a privilege array + ****************************************************************************/ + +static bool privilege_set_add(PRIVILEGE_SET *priv_set, struct lsa_LUIDAttribute set) +{ + struct lsa_LUIDAttribute *new_set; + + /* we can allocate memory to add the new privilege */ + + new_set = talloc_realloc(priv_set->mem_ctx, priv_set->set, struct lsa_LUIDAttribute, priv_set->count + 1); + if ( !new_set ) { + DEBUG(0,("privilege_set_add: failed to allocate memory!\n")); + return false; + } + + 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].attribute = set.attribute; + + priv_set->count++; + priv_set->set = new_set; + + return true; +} + +/******************************************************************* +*******************************************************************/ + +bool se_priv_to_privilege_set( PRIVILEGE_SET *set, uint64_t privilege_mask ) +{ + size_t i; + struct lsa_LUIDAttribute luid; + + luid.attribute = 0; + luid.luid.high = 0; + + for ( i=0; i<ARRAY_SIZE(privs); i++ ) { + if ((privilege_mask & privs[i].privilege_mask) == 0) + continue; + + luid.luid.high = 0; + luid.luid.low = privs[i].luid; + + if ( !privilege_set_add( set, luid ) ) + return false; + } + + return true; +} + +/******************************************************************* +*******************************************************************/ + +bool privilege_set_to_se_priv( uint64_t *privilege_mask, struct lsa_PrivilegeSet *privset ) +{ + uint32_t i; + + ZERO_STRUCTP( privilege_mask ); + + for ( i=0; i<privset->count; i++ ) { + uint64_t r; + + /* sanity check for invalid privilege. we really + only care about the low 32 bits */ + + if ( privset->set[i].luid.high != 0 ) + return false; + + r = sec_privilege_mask(privset->set[i].luid.low); + if (r) { + *privilege_mask |= r; + } + } + + return true; +} + +/* + map a privilege id to the wire string constant +*/ +const char *sec_privilege_name(enum sec_privilege privilege) +{ + size_t i; + for (i=0;i<ARRAY_SIZE(privs);i++) { + if (privs[i].luid == privilege) { + return privs[i].name; + } + } + return NULL; +} + +/* + map a privilege id to a privilege display name. Return NULL if not found + + TODO: this should use language mappings +*/ +const char *sec_privilege_display_name(enum sec_privilege privilege, uint16_t *language) +{ + size_t i; + for (i=0;i<ARRAY_SIZE(privs);i++) { + if (privs[i].luid == privilege) { + return privs[i].description; + } + } + return NULL; +} + +/* + map a privilege name to a privilege id. Return SEC_PRIV_INVALID if not found +*/ +enum sec_privilege sec_privilege_id(const char *name) +{ + size_t i; + for (i=0;i<ARRAY_SIZE(privs);i++) { + if (strcasecmp(privs[i].name, name) == 0) { + return privs[i].luid; + } + } + return SEC_PRIV_INVALID; +} + +/* + map a 'right' name to it's bitmap value. Return 0 if not found +*/ +uint32_t sec_right_bit(const char *name) +{ + size_t i; + for (i=0;i<ARRAY_SIZE(rights);i++) { + if (strcasecmp(rights[i].name, name) == 0) { + return rights[i].right_mask; + } + } + return 0; +} + +/* + assist in walking the table of privileges - return the LUID (low 32 bits) by index +*/ +enum sec_privilege sec_privilege_from_index(int idx) +{ + if (idx >= 0 && (unsigned)idx<ARRAY_SIZE(privs)) { + return privs[idx].luid; + } + return SEC_PRIV_INVALID; +} + +/* + assist in walking the table of privileges - return the string constant by index +*/ +const char *sec_privilege_name_from_index(int idx) +{ + if (idx >= 0 && (unsigned)idx<ARRAY_SIZE(privs)) { + return privs[idx].name; + } + return NULL; +} + + + +/* + return true if a security_token has a particular privilege bit set +*/ +bool security_token_has_privilege(const struct security_token *token, enum sec_privilege privilege) +{ + uint64_t mask; + + if (!token) { + return false; + } + + mask = sec_privilege_mask(privilege); + if (mask == 0) { + return false; + } + + if (token->privilege_mask & mask) { + return true; + } + return false; +} + +bool security_token_system_privilege(const struct security_token *token) +{ + if (token == NULL) { + return false; + } + + if (token->privilege_mask == (uint64_t)~0) { + return true; + } + + return false; +} + +/* + set a bit in the privilege mask +*/ +void security_token_set_privilege(struct security_token *token, enum sec_privilege privilege) +{ + /* Relies on the fact that an invalid privilege will return 0, so won't change this */ + token->privilege_mask |= sec_privilege_mask(privilege); +} + +/* + set a bit in the rights mask +*/ +void security_token_set_right_bit(struct security_token *token, uint32_t right_bit) +{ + token->rights_mask |= right_bit; +} + +char *security_token_debug_privileges(TALLOC_CTX *mem_ctx, + const struct security_token *token) +{ + char *s = NULL; + + s = talloc_asprintf(mem_ctx, + " Privileges (0x%16" PRIX64 "):\n", + token->privilege_mask); + + if (token->privilege_mask) { + size_t idx = 0; + size_t i = 0; + for (idx = 0; idx<ARRAY_SIZE(privs); idx++) { + if (token->privilege_mask & privs[idx].privilege_mask) { + talloc_asprintf_addbuf( + &s, + " Privilege[%3zu]: %s\n", + i++, + privs[idx].name); + } + } + } + + talloc_asprintf_addbuf(&s, + " Rights (0x%16" PRIX32 "):\n", + token->rights_mask); + + if (token->rights_mask) { + size_t idx = 0; + size_t i = 0; + for (idx = 0; idx<ARRAY_SIZE(rights); idx++) { + if (token->rights_mask & rights[idx].right_mask) { + talloc_asprintf_addbuf(&s, + " Right[%3zu]: %s\n", + i++, + rights[idx].name); + } + } + } + + return s; +} |