Cygwin: drop create_token and dependent functions
Given we only called create_token on W7 WOW64 anyway, we can now drop this function and all other functions only called from there entirely. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
parent
23b5466aed
commit
7bed18558d
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@ -379,41 +379,6 @@ sid_in_token_groups (PTOKEN_GROUPS grps, cygpsid sid)
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return false;
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}
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static void
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get_token_group_sidlist (cygsidlist &grp_list, PTOKEN_GROUPS my_grps)
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{
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if (my_grps)
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{
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grp_list += well_known_local_sid;
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grp_list += well_known_console_logon_sid;
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if (sid_in_token_groups (my_grps, well_known_dialup_sid))
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grp_list *= well_known_dialup_sid;
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if (sid_in_token_groups (my_grps, well_known_network_sid))
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grp_list *= well_known_network_sid;
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if (sid_in_token_groups (my_grps, well_known_batch_sid))
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grp_list *= well_known_batch_sid;
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grp_list *= well_known_interactive_sid;
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#if 0
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/* Don't add the SERVICE group when switching the user context.
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That's much too dangerous, since the service group adds the
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SE_IMPERSONATE_NAME privilege to the user. After all, the
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process started with this token is not the service process
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anymore anyway. */
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if (sid_in_token_groups (my_grps, well_known_service_sid))
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grp_list *= well_known_service_sid;
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#endif
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if (sid_in_token_groups (my_grps, well_known_this_org_sid))
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grp_list *= well_known_this_org_sid;
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grp_list *= well_known_users_sid;
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}
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else
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{
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grp_list += well_known_local_sid;
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grp_list *= well_known_interactive_sid;
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grp_list *= well_known_users_sid;
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}
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}
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bool
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get_server_groups (cygsidlist &grp_list, PSID usersid,
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acct_disabled_chk_t check_account_disabled)
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@ -470,180 +435,6 @@ get_server_groups (cygsidlist &grp_list, PSID usersid,
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return true;
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}
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static bool
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get_initgroups_sidlist (cygsidlist &grp_list, PSID usersid, PSID pgrpsid,
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PTOKEN_GROUPS my_grps)
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{
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if (well_known_system_sid != usersid)
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get_token_group_sidlist (grp_list, my_grps);
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if (!get_server_groups (grp_list, usersid, CHK_DISABLED))
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return false;
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/* special_pgrp true if pgrpsid is not in normal groups */
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grp_list += pgrpsid;
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return true;
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}
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static bool
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get_setgroups_sidlist (cygsidlist &tmp_list, PSID usersid,
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PTOKEN_GROUPS my_grps, user_groups &groups)
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{
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get_token_group_sidlist (tmp_list, my_grps);
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if (!get_server_groups (tmp_list, usersid, CHK_DISABLED))
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return false;
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for (int gidx = 0; gidx < groups.sgsids.count (); gidx++)
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tmp_list += groups.sgsids.sids[gidx];
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tmp_list += groups.pgsid;
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return true;
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}
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/* Fixed size TOKEN_PRIVILEGES list to reflect privileges given to the
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SYSTEM account by default. */
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const struct
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{
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DWORD PrivilegeCount;
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LUID_AND_ATTRIBUTES Privileges[28];
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} sys_privs =
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{
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28,
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{
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{ { SE_CREATE_TOKEN_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_ASSIGNPRIMARYTOKEN_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_LOCK_MEMORY_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_INCREASE_QUOTA_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_TCB_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_SECURITY_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_TAKE_OWNERSHIP_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_LOAD_DRIVER_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_SYSTEM_PROFILE_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_SYSTEMTIME_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_PROF_SINGLE_PROCESS_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_INC_BASE_PRIORITY_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_CREATE_PAGEFILE_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_CREATE_PERMANENT_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_BACKUP_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_RESTORE_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_SHUTDOWN_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_DEBUG_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_AUDIT_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_SYSTEM_ENVIRONMENT_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_CHANGE_NOTIFY_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_UNDOCK_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_MANAGE_VOLUME_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_IMPERSONATE_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_CREATE_GLOBAL_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_INCREASE_WORKING_SET_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_TIME_ZONE_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT },
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{ { SE_CREATE_SYMBOLIC_LINK_PRIVILEGE, 0 },
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT }
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}
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};
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static PTOKEN_PRIVILEGES
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get_priv_list (LSA_HANDLE lsa, cygsid &usersid, cygsidlist &grp_list,
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size_t &size, cygpsid *mandatory_integrity_sid)
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{
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PLSA_UNICODE_STRING privstrs;
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ULONG cnt;
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PTOKEN_PRIVILEGES privs = NULL;
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if (usersid == well_known_system_sid)
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{
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if (mandatory_integrity_sid)
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*mandatory_integrity_sid = mandatory_system_integrity_sid;
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return (PTOKEN_PRIVILEGES) &sys_privs;
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}
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if (mandatory_integrity_sid)
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*mandatory_integrity_sid = mandatory_medium_integrity_sid;
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for (int grp = -1; grp < grp_list.count (); ++grp)
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{
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if (grp == -1)
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{
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if (LsaEnumerateAccountRights (lsa, usersid, &privstrs, &cnt)
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!= STATUS_SUCCESS)
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continue;
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}
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else if (LsaEnumerateAccountRights (lsa, grp_list.sids[grp],
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&privstrs, &cnt) != STATUS_SUCCESS)
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continue;
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for (ULONG i = 0; i < cnt; ++i)
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{
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LUID priv;
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PTOKEN_PRIVILEGES tmp;
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DWORD tmp_count;
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bool high_integrity;
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if (!privilege_luid (privstrs[i].Buffer, priv, high_integrity))
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continue;
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if (privs)
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{
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DWORD pcnt = privs->PrivilegeCount;
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LUID_AND_ATTRIBUTES *p = privs->Privileges;
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for (; pcnt > 0; --pcnt, ++p)
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if (priv.HighPart == p->Luid.HighPart
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&& priv.LowPart == p->Luid.LowPart)
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goto next_account_right;
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}
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tmp_count = privs ? privs->PrivilegeCount : 0;
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size = sizeof (DWORD)
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+ (tmp_count + 1) * sizeof (LUID_AND_ATTRIBUTES);
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tmp = (PTOKEN_PRIVILEGES) realloc (privs, size);
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if (!tmp)
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{
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if (privs)
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free (privs);
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LsaFreeMemory (privstrs);
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debug_printf ("realloc (privs) failed.");
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return NULL;
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}
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tmp->PrivilegeCount = tmp_count;
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privs = tmp;
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privs->Privileges[privs->PrivilegeCount].Luid = priv;
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privs->Privileges[privs->PrivilegeCount].Attributes =
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SE_PRIVILEGE_ENABLED | SE_PRIVILEGE_ENABLED_BY_DEFAULT;
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++privs->PrivilegeCount;
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if (mandatory_integrity_sid && high_integrity)
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*mandatory_integrity_sid = mandatory_high_integrity_sid;
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next_account_right:
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;
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}
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LsaFreeMemory (privstrs);
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}
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return privs;
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}
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/* Accept a token if
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- the requested usersid matches the TokenUser and
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- if setgroups has been called:
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@ -654,9 +445,8 @@ get_priv_list (LSA_HANDLE lsa, cygsid &usersid, cygsidlist &grp_list,
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they match and verify only the primary groups.
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The requested primary group must appear in the token.
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The primary group in the token is a group associated with the usersid,
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except if the token is internal and the group is in the token SD
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(see create_token). In that latter case that group must match the
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requested primary group. */
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except if the token is internal and the group is in the token SD. In
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that latter case that group must match the requested primary group. */
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bool
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verify_token (HANDLE token, cygsid &usersid, user_groups &groups, bool *pintern)
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{
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@ -786,160 +576,6 @@ account_restriction (NTSTATUS status)
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return type;
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}
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HANDLE
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create_token (cygsid &usersid, user_groups &new_groups)
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{
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NTSTATUS status;
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LSA_HANDLE lsa = NULL;
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cygsidlist tmp_gsids (cygsidlist_auto, 12);
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SECURITY_QUALITY_OF_SERVICE sqos =
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{ sizeof sqos, SecurityImpersonation, SECURITY_STATIC_TRACKING, FALSE };
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OBJECT_ATTRIBUTES oa = { sizeof oa, 0, 0, 0, 0, &sqos };
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/* Up to Windows 7, when using an authentication LUID other than "Anonymous",
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Windows whoami prints the wrong username, the one from the login session,
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not the one from the actual user token of the process. This is apparently
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fixed in Windows 8. However, starting with Windows 8, access rights of
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the anonymous logon session is further restricted. Therefore we create
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the new user token with the authentication id of the local service
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account. Hopefully that's sufficient. */
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const LUID auth_luid_7 = ANONYMOUS_LOGON_LUID;
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const LUID auth_luid_8 = LOCALSERVICE_LUID;
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LUID auth_luid = wincap.has_broken_whoami () ? auth_luid_7 : auth_luid_8;
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LARGE_INTEGER exp = { QuadPart:INT64_MAX };
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TOKEN_USER user;
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PTOKEN_GROUPS new_tok_gsids = NULL;
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PTOKEN_PRIVILEGES privs = NULL;
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TOKEN_OWNER owner;
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TOKEN_PRIMARY_GROUP pgrp;
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TOKEN_DEFAULT_DACL dacl = {};
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TOKEN_SOURCE source;
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TOKEN_STATISTICS stats;
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memcpy (source.SourceName, "Cygwin.1", 8);
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source.SourceIdentifier.HighPart = 0;
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source.SourceIdentifier.LowPart = 0x0101;
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HANDLE token = NULL;
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HANDLE primary_token = NULL;
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tmp_pathbuf tp;
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PTOKEN_GROUPS my_tok_gsids = NULL;
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cygpsid mandatory_integrity_sid;
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ULONG size;
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size_t psize = 0;
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/* SE_CREATE_TOKEN_NAME privilege needed to call NtCreateToken. */
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push_self_privilege (SE_CREATE_TOKEN_PRIVILEGE, true);
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/* Open policy object. */
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if (!(lsa = lsa_open_policy (NULL, POLICY_EXECUTE)))
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goto out;
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/* User, owner, primary group. */
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user.User.Sid = usersid;
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user.User.Attributes = 0;
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owner.Owner = usersid;
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/* Retrieve authentication id and group list from own process. */
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if (hProcToken)
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{
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/* Switching user context to SYSTEM doesn't inherit the authentication
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id of the user account running current process. */
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if (usersid == well_known_system_sid)
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/* nothing to do */;
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else
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{
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status = NtQueryInformationToken (hProcToken, TokenStatistics,
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&stats, sizeof stats, &size);
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if (!NT_SUCCESS (status))
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debug_printf ("NtQueryInformationToken(hProcToken, "
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"TokenStatistics), %y", status);
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}
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/* Retrieving current processes group list to be able to inherit
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some important well known group sids. */
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my_tok_gsids = (PTOKEN_GROUPS) tp.w_get ();
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status = NtQueryInformationToken (hProcToken, TokenGroups, my_tok_gsids,
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2 * NT_MAX_PATH, &size);
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if (!NT_SUCCESS (status))
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{
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debug_printf ("NtQueryInformationToken(hProcToken, TokenGroups), "
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"%y", status);
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my_tok_gsids = NULL;
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}
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}
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/* Create list of groups, the user is member in. */
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if (new_groups.issetgroups ())
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{
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if (!get_setgroups_sidlist (tmp_gsids, usersid, my_tok_gsids, new_groups))
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goto out;
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}
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else if (!get_initgroups_sidlist (tmp_gsids, usersid, new_groups.pgsid,
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my_tok_gsids))
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goto out;
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/* Primary group. */
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pgrp.PrimaryGroup = new_groups.pgsid;
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/* Create a TOKEN_GROUPS list from the above retrieved list of sids. */
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new_tok_gsids = (PTOKEN_GROUPS)
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alloca (sizeof (DWORD) + (tmp_gsids.count () + 1)
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* sizeof (SID_AND_ATTRIBUTES));
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new_tok_gsids->GroupCount = tmp_gsids.count ();
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for (DWORD i = 0; i < new_tok_gsids->GroupCount; ++i)
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{
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new_tok_gsids->Groups[i].Sid = tmp_gsids.sids[i];
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new_tok_gsids->Groups[i].Attributes = SE_GROUP_MANDATORY
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| SE_GROUP_ENABLED_BY_DEFAULT
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| SE_GROUP_ENABLED;
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}
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/* Retrieve list of privileges of that user. Based on the usersid and
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the returned privileges, get_priv_list sets the mandatory_integrity_sid
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pointer to the correct MIC SID for UAC. */
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if (!(privs = get_priv_list (lsa, usersid, tmp_gsids, psize,
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&mandatory_integrity_sid)))
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goto out;
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new_tok_gsids->Groups[new_tok_gsids->GroupCount].Attributes =
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SE_GROUP_INTEGRITY | SE_GROUP_INTEGRITY_ENABLED;
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new_tok_gsids->Groups[new_tok_gsids->GroupCount++].Sid
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= mandatory_integrity_sid;
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/* Let's be heroic... */
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status = NtCreateToken (&token, TOKEN_ALL_ACCESS, &oa, TokenImpersonation,
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&auth_luid, &exp, &user, new_tok_gsids, privs, &owner,
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&pgrp, &dacl, &source);
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if (status)
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__seterrno_from_nt_status (status);
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else
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{
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/* Convert to primary token. */
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if (!DuplicateTokenEx (token, MAXIMUM_ALLOWED, &sec_none,
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SecurityImpersonation, TokenPrimary,
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&primary_token))
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{
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__seterrno ();
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debug_printf ("DuplicateTokenEx %E");
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primary_token = NULL;
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}
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}
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out:
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pop_self_privilege ();
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if (token != INVALID_HANDLE_VALUE)
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CloseHandle (token);
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if (privs && privs != (PTOKEN_PRIVILEGES) &sys_privs)
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free (privs);
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lsa_close_policy (lsa);
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debug_printf ("%p = create_token ()", primary_token);
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return primary_token;
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}
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#define SFU_LSA_KEY_SUFFIX L"_microsoft_sfu_utility"
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HANDLE
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@ -457,8 +457,6 @@ int setacl (HANDLE, path_conv &, int, struct acl *, bool &);
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/* Set impersonation or restricted token. */
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void set_imp_token (HANDLE token, int type);
|
||||
/* Function creating a token by calling NtCreateToken. */
|
||||
HANDLE create_token (cygsid &usersid, user_groups &groups);
|
||||
/* LSA private key storage authentication, same as when using service logons. */
|
||||
HANDLE lsaprivkeyauth (struct passwd *pw);
|
||||
/* Kerberos or MsV1 S4U logon. */
|
||||
|
|
|
|||
|
|
@ -752,11 +752,9 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
|
|||
sa = sec_user ((PSECURITY_ATTRIBUTES) alloca (1024),
|
||||
::cygheap->user.sid ());
|
||||
/* We're creating a window station per user, not per logon
|
||||
session First of all we might not have a valid logon session
|
||||
for the user (logon by create_token), and second, it doesn't
|
||||
make sense in terms of security to create a new window
|
||||
station for every logon of the same user. It just fills up
|
||||
the system with window stations for no good reason. */
|
||||
session. It doesn't make sense in terms of security to
|
||||
create a new window station for every logon of the same user.
|
||||
It just fills up the system with window stations. */
|
||||
hwst = CreateWindowStationW (::cygheap->user.get_windows_id (sid),
|
||||
0, GENERIC_READ | GENERIC_WRITE, sa);
|
||||
if (!hwst)
|
||||
|
|
|
|||
|
|
@ -3609,8 +3609,7 @@ seteuid32 (uid_t uid)
|
|||
debug_printf ("Found token %p", new_token);
|
||||
|
||||
/* If no impersonation token is available, try to authenticate using
|
||||
LSA private data stored password, LSA authentication using our own
|
||||
LSA module, or, as last chance, NtCreateToken. */
|
||||
LSA private data stored password, or, if that fails, S4U logon. */
|
||||
if (new_token == NULL)
|
||||
{
|
||||
if (!(new_token = lsaprivkeyauth (pw_new)))
|
||||
|
|
@ -3623,23 +3622,9 @@ seteuid32 (uid_t uid)
|
|||
extract_nt_dom_user (pw_new, domain, user);
|
||||
if (!(new_token = s4uauth (true, domain, user, status)))
|
||||
{
|
||||
if (status != STATUS_INVALID_PARAMETER)
|
||||
{
|
||||
debug_printf ("s4uauth failed, bail out");
|
||||
cygheap->user.reimpersonate ();
|
||||
return -1;
|
||||
}
|
||||
/* If s4uauth fails with status code STATUS_INVALID_PARAMETER,
|
||||
we're running on a system not implementing MsV1_0S4ULogon
|
||||
(Windows 7 WOW64). Fall back to create_token in this single
|
||||
case only. */
|
||||
debug_printf ("s4uauth failed, try create_token.");
|
||||
if (!(new_token = create_token (usersid, groups)))
|
||||
{
|
||||
debug_printf ("create_token failed, bail out");
|
||||
cygheap->user.reimpersonate ();
|
||||
return -1;
|
||||
}
|
||||
debug_printf ("s4uauth failed, bail out");
|
||||
cygheap->user.reimpersonate ();
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue