diff options
Diffstat (limited to 'winsup/cygwin/sec_helper.cc')
| -rw-r--r-- | winsup/cygwin/sec_helper.cc | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/winsup/cygwin/sec_helper.cc b/winsup/cygwin/sec_helper.cc deleted file mode 100644 index f300398c7..000000000 --- a/winsup/cygwin/sec_helper.cc +++ /dev/null @@ -1,435 +0,0 @@ -/* sec_helper.cc: NT security helper functions - - Copyright 2000, 2001, 2002 Red Hat, Inc. - - Written by Corinna Vinschen <corinna@vinschen.de> - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <grp.h> -#include <pwd.h> -#include <unistd.h> -#include <stdlib.h> -#include <errno.h> -#include <limits.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/acl.h> -#include <ctype.h> -#include <wingdi.h> -#include <winuser.h> -#include <wininet.h> -#include "cygerrno.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "dtable.h" -#include "pinfo.h" -#include "cygheap.h" -#include "pwdgrp.h" - -/* General purpose security attribute objects for global use. */ -SECURITY_ATTRIBUTES NO_COPY sec_none; -SECURITY_ATTRIBUTES NO_COPY sec_none_nih; -SECURITY_ATTRIBUTES NO_COPY sec_all; -SECURITY_ATTRIBUTES NO_COPY sec_all_nih; - -SID_IDENTIFIER_AUTHORITY sid_auth[] = { - {SECURITY_NULL_SID_AUTHORITY}, - {SECURITY_WORLD_SID_AUTHORITY}, - {SECURITY_LOCAL_SID_AUTHORITY}, - {SECURITY_CREATOR_SID_AUTHORITY}, - {SECURITY_NON_UNIQUE_AUTHORITY}, - {SECURITY_NT_AUTHORITY} -}; - -cygsid well_known_null_sid; -cygsid well_known_world_sid; -cygsid well_known_local_sid; -cygsid well_known_creator_owner_sid; -cygsid well_known_creator_group_sid; -cygsid well_known_dialup_sid; -cygsid well_known_network_sid; -cygsid well_known_batch_sid; -cygsid well_known_interactive_sid; -cygsid well_known_service_sid; -cygsid well_known_authenticated_users_sid; -cygsid well_known_system_sid; -cygsid well_known_admins_sid; - -void -cygsid::init () -{ - well_known_null_sid = "S-1-0-0"; - well_known_world_sid = "S-1-1-0"; - well_known_local_sid = "S-1-2-0"; - well_known_creator_owner_sid = "S-1-3-0"; - well_known_creator_group_sid = "S-1-3-1"; - well_known_dialup_sid = "S-1-5-1"; - well_known_network_sid = "S-1-5-2"; - well_known_batch_sid = "S-1-5-3"; - well_known_interactive_sid = "S-1-5-4"; - well_known_service_sid = "S-1-5-6"; - well_known_authenticated_users_sid = "S-1-5-11"; - well_known_system_sid = "S-1-5-18"; - well_known_admins_sid = "S-1-5-32-544"; -} - -char * -cygsid::string (char *nsidstr) const -{ - char t[32]; - DWORD i; - - if (!psid || !nsidstr) - return NULL; - strcpy (nsidstr, "S-1-"); - __small_sprintf (t, "%u", GetSidIdentifierAuthority (psid)->Value[5]); - strcat (nsidstr, t); - for (i = 0; i < *GetSidSubAuthorityCount (psid); ++i) - { - __small_sprintf (t, "-%lu", *GetSidSubAuthority (psid, i)); - strcat (nsidstr, t); - } - return nsidstr; -} - -PSID -cygsid::get_sid (DWORD s, DWORD cnt, DWORD *r) -{ - DWORD i; - - if (s > 5 || cnt < 1 || cnt > 8) - { - psid = NO_SID; - return NULL; - } - set (); - InitializeSid (psid, &sid_auth[s], cnt); - for (i = 0; i < cnt; ++i) - memcpy ((char *) psid + 8 + sizeof (DWORD) * i, &r[i], sizeof (DWORD)); - return psid; -} - -const PSID -cygsid::getfromstr (const char *nsidstr) -{ - char *lasts; - DWORD s, cnt = 0; - DWORD r[8]; - - if (nsidstr && !strncmp (nsidstr, "S-1-", 4)) - { - s = strtoul (nsidstr + 4, &lasts, 10); - while ( cnt < 8 && *lasts == '-') - r[cnt++] = strtoul (lasts + 1, &lasts, 10); - if (!*lasts) - return get_sid (s, cnt, r); - } - return psid = NO_SID; -} - -BOOL -cygsid::getfrompw (const struct passwd *pw) -{ - char *sp = (pw && pw->pw_gecos) ? strrchr (pw->pw_gecos, ',') : NULL; - return (*this = sp ? sp + 1 : sp) != NULL; -} - -BOOL -cygsid::getfromgr (const struct __group32 *gr) -{ - char *sp = (gr && gr->gr_passwd) ? gr->gr_passwd : NULL; - return (*this = sp) != NULL; -} - -__uid32_t -cygsid::get_id (BOOL search_grp, int *type) -{ - /* First try to get SID from passwd or group entry */ - __uid32_t id = ILLEGAL_UID; - - if (!search_grp) - { - struct passwd *pw; - if (*this == cygheap->user.sid ()) - id = myself->uid; - else if ((pw = internal_getpwsid (*this))) - id = pw->pw_uid; - if (id != ILLEGAL_UID) - { - if (type) - *type = USER; - return id; - } - } - if (search_grp || type) - { - struct __group32 *gr; - if (cygheap->user.groups.pgsid == psid) - id = myself->gid; - else if ((gr = internal_getgrsid (*this))) - id = gr->gr_gid; - if (id != ILLEGAL_UID && type) - *type = GROUP; - } - return id; -} - -BOOL -is_grp_member (__uid32_t uid, __gid32_t gid) -{ - struct passwd *pw; - struct __group32 *gr; - int idx; - - /* Evaluate current user info by examining the info given in cygheap and - the current access token if ntsec is on. */ - if (uid == myself->uid) - { - /* If gid == primary group of current user, return immediately. */ - if (gid == myself->gid) - return TRUE; - /* Calling getgroups only makes sense when reading the access token. */ - if (allow_ntsec) - { - __gid32_t grps[NGROUPS_MAX]; - int cnt = internal_getgroups (NGROUPS_MAX, grps); - for (idx = 0; idx < cnt; ++idx) - if (grps[idx] == gid) - return TRUE; - return FALSE; - } - } - - /* Otherwise try getting info from examining passwd and group files. */ - if ((pw = internal_getpwuid (uid))) - { - /* If gid == primary group of uid, return immediately. */ - if ((__gid32_t) pw->pw_gid == gid) - return TRUE; - /* Otherwise search for supplementary user list of this group. */ - if ((gr = internal_getgrgid (gid))) - for (idx = 0; gr->gr_mem[idx]; ++idx) - if (strcasematch (cygheap->user.name (), gr->gr_mem[idx])) - return TRUE; - } - return FALSE; -} - -#if 0 // unused -#define SIDLEN (sidlen = MAX_SID_LEN, &sidlen) -#define DOMLEN (domlen = INTERNET_MAX_HOST_NAME_LENGTH, &domlen) - -BOOL -lookup_name (const char *name, const char *logsrv, PSID ret_sid) -{ - cygsid sid; - DWORD sidlen; - char domuser[INTERNET_MAX_HOST_NAME_LENGTH + UNLEN + 2]; - char dom[INTERNET_MAX_HOST_NAME_LENGTH + 1]; - DWORD domlen; - SID_NAME_USE acc_type; - - debug_printf ("name : %s", name ? name : "NULL"); - - if (!name) - return FALSE; - - if (cygheap->user.domain ()) - { - strcat (strcat (strcpy (domuser, cygheap->user.domain ()), "\\"), name); - if (LookupAccountName (NULL, domuser, sid, SIDLEN, dom, DOMLEN, &acc_type) - && legal_sid_type (acc_type)) - goto got_it; - if (logsrv && *logsrv - && LookupAccountName (logsrv, domuser, sid, SIDLEN, - dom, DOMLEN, &acc_type) - && legal_sid_type (acc_type)) - goto got_it; - } - if (logsrv && *logsrv) - { - if (LookupAccountName (logsrv, name, sid, SIDLEN, dom, DOMLEN, &acc_type) - && legal_sid_type (acc_type)) - goto got_it; - if (acc_type == SidTypeDomain) - { - strcat (strcat (strcpy (domuser, dom), "\\"), name); - if (LookupAccountName (logsrv, domuser, sid, SIDLEN, - dom, DOMLEN, &acc_type)) - goto got_it; - } - } - if (LookupAccountName (NULL, name, sid, SIDLEN, dom, DOMLEN, &acc_type) - && legal_sid_type (acc_type)) - goto got_it; - if (acc_type == SidTypeDomain) - { - strcat (strcat (strcpy (domuser, dom), "\\"), name); - if (LookupAccountName (NULL, domuser, sid, SIDLEN, dom, DOMLEN,&acc_type)) - goto got_it; - } - debug_printf ("LookupAccountName (%s) %E", name); - __seterrno (); - return FALSE; - -got_it: - debug_printf ("sid : [%d]", *GetSidSubAuthority ((PSID) sid, - *GetSidSubAuthorityCount ((PSID) sid) - 1)); - - if (ret_sid) - memcpy (ret_sid, sid, sidlen); - - return TRUE; -} - -#undef SIDLEN -#undef DOMLEN -#endif //unused - -int -set_process_privilege (const char *privilege, BOOL enable) -{ - HANDLE hToken = NULL; - LUID restore_priv; - TOKEN_PRIVILEGES new_priv, orig_priv; - int ret = -1; - DWORD size; - - if (!OpenProcessToken (hMainProc, TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, - &hToken)) - { - __seterrno (); - goto out; - } - - if (!LookupPrivilegeValue (NULL, privilege, &restore_priv)) - { - __seterrno (); - goto out; - } - - new_priv.PrivilegeCount = 1; - new_priv.Privileges[0].Luid = restore_priv; - new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; - - if (!AdjustTokenPrivileges (hToken, FALSE, &new_priv, - sizeof orig_priv, &orig_priv, &size)) - { - __seterrno (); - goto out; - } - /* AdjustTokenPrivileges returns TRUE even if the privilege could not - be enabled. GetLastError () returns an correct error code, though. */ - if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) - { - debug_printf ("Privilege %s couldn't be assigned", privilege); - __seterrno (); - goto out; - } - - ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; - -out: - if (hToken) - CloseHandle (hToken); - - syscall_printf ("%d = set_process_privilege (%s, %d)", ret, privilege, enable); - return ret; -} - -/* - * Function to return a common SECURITY_DESCRIPTOR * that - * allows all access. - */ - -static NO_COPY SECURITY_DESCRIPTOR *null_sdp = 0; - -SECURITY_DESCRIPTOR *__stdcall -get_null_sd () -{ - static NO_COPY SECURITY_DESCRIPTOR sd; - - if (null_sdp == 0) - { - InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION); - SetSecurityDescriptorDacl (&sd, TRUE, 0, FALSE); - null_sdp = &sd; - } - return null_sdp; -} - -BOOL -sec_acl (PACL acl, BOOL admins, PSID sid1, PSID sid2) -{ - size_t acl_len = MAX_DACL_LEN(5); - - if (!InitializeAcl (acl, acl_len, ACL_REVISION)) - { - debug_printf ("InitializeAcl %E"); - return FALSE; - } - if (sid2) - if (!AddAccessAllowedAce (acl, ACL_REVISION, - GENERIC_ALL, sid2)) - debug_printf ("AddAccessAllowedAce(sid2) %E"); - if (sid1) - if (!AddAccessAllowedAce (acl, ACL_REVISION, - GENERIC_ALL, sid1)) - debug_printf ("AddAccessAllowedAce(sid1) %E"); - if (admins) - if (!AddAccessAllowedAce (acl, ACL_REVISION, - GENERIC_ALL, well_known_admins_sid)) - debug_printf ("AddAccessAllowedAce(admin) %E"); - if (!AddAccessAllowedAce (acl, ACL_REVISION, - GENERIC_ALL, well_known_system_sid)) - debug_printf ("AddAccessAllowedAce(system) %E"); -#if 0 /* Does not seem to help */ - if (!AddAccessAllowedAce (acl, ACL_REVISION, - GENERIC_ALL, well_known_creator_owner_sid)) - debug_printf ("AddAccessAllowedAce(creator_owner) %E"); -#endif - return TRUE; -} - -PSECURITY_ATTRIBUTES __stdcall -__sec_user (PVOID sa_buf, PSID sid2, BOOL inherit) -{ - PSECURITY_ATTRIBUTES psa = (PSECURITY_ATTRIBUTES) sa_buf; - PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR) - ((char *) sa_buf + sizeof (*psa)); - PACL acl = (PACL) ((char *) sa_buf + sizeof (*psa) + sizeof (*psd)); - - cygsid sid; - - if (!(sid = cygheap->user.orig_sid ()) || - (!sec_acl (acl, TRUE, sid, sid2))) - return inherit ? &sec_none : &sec_none_nih; - - if (!InitializeSecurityDescriptor (psd, SECURITY_DESCRIPTOR_REVISION)) - debug_printf ("InitializeSecurityDescriptor %E"); - -/* - * Setting the owner lets the created security attribute not work - * on NT4 SP3 Server. Don't know why, but the function still does - * what it should do also if the owner isn't set. -*/ -#if 0 - if (!SetSecurityDescriptorOwner (psd, sid, FALSE)) - debug_printf ("SetSecurityDescriptorOwner %E"); -#endif - - if (!SetSecurityDescriptorDacl (psd, TRUE, acl, FALSE)) - debug_printf ("SetSecurityDescriptorDacl %E"); - - psa->nLength = sizeof (SECURITY_ATTRIBUTES); - psa->lpSecurityDescriptor = psd; - psa->bInheritHandle = inherit; - return psa; -} |