526 lines
12 KiB
C++
526 lines
12 KiB
C++
/* ldap.cc: Helper functions for ldap access to Active Directory.
|
|
|
|
Copyright 2014 Red Hat, Inc.
|
|
|
|
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 "ldap.h"
|
|
#include "cygerrno.h"
|
|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "dtable.h"
|
|
#include "cygheap.h"
|
|
#include "registry.h"
|
|
#include "pinfo.h"
|
|
#include "lm.h"
|
|
#include "dsgetdc.h"
|
|
#include "tls_pbuf.h"
|
|
|
|
#define CYG_LDAP_TIMEOUT 5 /* seconds */
|
|
#define CYG_LDAP_ENUM_TIMEOUT 60 /* seconds */
|
|
|
|
#define CYG_LDAP_ENUM_PAGESIZE 100 /* entries per page */
|
|
|
|
static LDAP_TIMEVAL def_tv = { CYG_LDAP_TIMEOUT, 0 };
|
|
static LDAP_TIMEVAL enum_tv = { CYG_LDAP_ENUM_TIMEOUT, 0 };
|
|
|
|
static PWCHAR rootdse_attr[] =
|
|
{
|
|
(PWCHAR) L"defaultNamingContext",
|
|
(PWCHAR) L"supportedCapabilities",
|
|
NULL
|
|
};
|
|
|
|
static PWCHAR user_attr[] =
|
|
{
|
|
(PWCHAR) L"primaryGroupID",
|
|
(PWCHAR) L"gecos",
|
|
(PWCHAR) L"unixHomeDirectory",
|
|
(PWCHAR) L"loginShell",
|
|
(PWCHAR) L"uidNumber",
|
|
NULL
|
|
};
|
|
|
|
static PWCHAR group_attr[] =
|
|
{
|
|
(PWCHAR) L"cn",
|
|
(PWCHAR) L"gidNumber",
|
|
NULL
|
|
};
|
|
|
|
PWCHAR tdom_attr[] =
|
|
{
|
|
(PWCHAR) L"trustPosixOffset",
|
|
NULL
|
|
};
|
|
|
|
PWCHAR sid_attr[] =
|
|
{
|
|
(PWCHAR) L"objectSid",
|
|
NULL
|
|
};
|
|
|
|
PWCHAR rfc2307_uid_attr[] =
|
|
{
|
|
(PWCHAR) L"uid",
|
|
NULL
|
|
};
|
|
|
|
PWCHAR rfc2307_gid_attr[] =
|
|
{
|
|
(PWCHAR) L"cn",
|
|
NULL
|
|
};
|
|
|
|
bool
|
|
cyg_ldap::connect_ssl (PCWSTR domain)
|
|
{
|
|
ULONG ret, timelimit = CYG_LDAP_TIMEOUT;
|
|
|
|
if (!(lh = ldap_sslinitW ((PWCHAR) domain, LDAP_SSL_PORT, 1)))
|
|
{
|
|
debug_printf ("ldap_init(%W) error 0x%02x", domain, LdapGetLastError ());
|
|
return false;
|
|
}
|
|
if ((ret = ldap_set_option (lh, LDAP_OPT_TIMELIMIT, &timelimit))
|
|
!= LDAP_SUCCESS)
|
|
debug_printf ("ldap_set_option(LDAP_OPT_TIMELIMIT) error 0x%02x", ret);
|
|
if ((ret = ldap_bind_s (lh, NULL, NULL, LDAP_AUTH_NEGOTIATE)) != LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_bind(%W) 0x%02x", domain, ret);
|
|
ldap_unbind (lh);
|
|
lh = NULL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::connect_non_ssl (PCWSTR domain)
|
|
{
|
|
ULONG ret, timelimit = CYG_LDAP_TIMEOUT;
|
|
|
|
if (!(lh = ldap_initW ((PWCHAR) domain, LDAP_PORT)))
|
|
{
|
|
debug_printf ("ldap_init(%W) error 0x%02x", domain, LdapGetLastError ());
|
|
return false;
|
|
}
|
|
if ((ret = ldap_set_option (lh, LDAP_OPT_SIGN, LDAP_OPT_ON))
|
|
!= LDAP_SUCCESS)
|
|
debug_printf ("ldap_set_option(LDAP_OPT_SIGN) error 0x%02x", ret);
|
|
if ((ret = ldap_set_option (lh, LDAP_OPT_ENCRYPT, LDAP_OPT_ON))
|
|
!= LDAP_SUCCESS)
|
|
debug_printf ("ldap_set_option(LDAP_OPT_ENCRYPT) error 0x%02x", ret);
|
|
if ((ret = ldap_set_option (lh, LDAP_OPT_TIMELIMIT, &timelimit))
|
|
!= LDAP_SUCCESS)
|
|
debug_printf ("ldap_set_option(LDAP_OPT_TIMELIMIT) error 0x%02x", ret);
|
|
if ((ret = ldap_bind_s (lh, NULL, NULL, LDAP_AUTH_NEGOTIATE)) != LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_bind(%W) 0x%02x", domain, ret);
|
|
ldap_unbind (lh);
|
|
lh = NULL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::open (PCWSTR domain)
|
|
{
|
|
ULONG ret;
|
|
|
|
/* Already open? */
|
|
if (lh)
|
|
return true;
|
|
|
|
/* FIXME? connect_ssl can take ages even when failing, so we're trying to
|
|
do everything the non-SSL (but still encrypted) way. */
|
|
if (/*!connect_ssl (NULL) && */ !connect_non_ssl (domain))
|
|
return false;
|
|
if ((ret = ldap_search_stW (lh, NULL, LDAP_SCOPE_BASE,
|
|
(PWCHAR) L"(objectclass=*)", rootdse_attr,
|
|
0, &def_tv, &msg))
|
|
!= LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_search(%W, ROOTDSE) error 0x%02x", domain, ret);
|
|
goto err;
|
|
}
|
|
if (!(entry = ldap_first_entry (lh, msg)))
|
|
{
|
|
debug_printf ("No ROOTDSE entry for %W", domain);
|
|
goto err;
|
|
}
|
|
if (!(val = ldap_get_valuesW (lh, entry, rootdse_attr[0])))
|
|
{
|
|
debug_printf ("No ROOTDSE value for %W", domain);
|
|
goto err;
|
|
}
|
|
if (!(rootdse = wcsdup (val[0])))
|
|
{
|
|
debug_printf ("wcsdup(%W, ROOTDSE) %d", domain, get_errno ());
|
|
goto err;
|
|
}
|
|
ldap_value_freeW (val);
|
|
if ((val = ldap_get_valuesW (lh, entry, rootdse_attr[1])))
|
|
{
|
|
for (ULONG idx = 0; idx < ldap_count_valuesW (val); ++idx)
|
|
if (!wcscmp (val[idx], LDAP_CAP_ACTIVE_DIRECTORY_OID_W))
|
|
{
|
|
isAD = true;
|
|
break;
|
|
}
|
|
}
|
|
ldap_value_freeW (val);
|
|
val = NULL;
|
|
ldap_msgfree (msg);
|
|
msg = entry = NULL; return true;
|
|
err:
|
|
close ();
|
|
return false;
|
|
}
|
|
|
|
void
|
|
cyg_ldap::close ()
|
|
{
|
|
if (srch_id != NULL)
|
|
ldap_search_abandon_page (lh, srch_id);
|
|
if (lh)
|
|
ldap_unbind (lh);
|
|
if (srch_msg)
|
|
ldap_msgfree (srch_msg);
|
|
if (msg)
|
|
ldap_msgfree (msg);
|
|
if (val)
|
|
ldap_value_freeW (val);
|
|
if (rootdse)
|
|
free (rootdse);
|
|
lh = NULL;
|
|
msg = entry = NULL;
|
|
val = NULL;
|
|
rootdse = NULL;
|
|
srch_id = NULL;
|
|
srch_msg = srch_entry = NULL;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::fetch_ad_account (PSID sid, bool group, PCWSTR domain)
|
|
{
|
|
WCHAR filter[140], *f, *rdse = rootdse;
|
|
LONG len = (LONG) RtlLengthSid (sid);
|
|
PBYTE s = (PBYTE) sid;
|
|
static WCHAR hex_wchars[] = L"0123456789abcdef";
|
|
ULONG ret;
|
|
tmp_pathbuf tp;
|
|
|
|
if (msg)
|
|
{
|
|
ldap_msgfree (msg);
|
|
msg = entry = NULL;
|
|
}
|
|
if (val)
|
|
{
|
|
ldap_value_freeW (val);
|
|
val = NULL;
|
|
}
|
|
f = wcpcpy (filter, L"(objectSid=");
|
|
while (len-- > 0)
|
|
{
|
|
*f++ = L'\\';
|
|
*f++ = hex_wchars[*s >> 4];
|
|
*f++ = hex_wchars[*s++ & 0xf];
|
|
}
|
|
wcpcpy (f, L")");
|
|
if (domain)
|
|
{
|
|
/* FIXME: This is a hack. The most correct solution is probably to
|
|
open a connection to the DC of the trusted domain. But this always
|
|
takes extra time, so we're trying to avoid it. If this results in
|
|
problems, we know what to do. */
|
|
rdse = tp.w_get ();
|
|
PWCHAR r = rdse;
|
|
for (PWCHAR dotp = (PWCHAR) domain; dotp && *dotp; domain = dotp)
|
|
{
|
|
dotp = wcschr (domain, L'.');
|
|
if (dotp)
|
|
*dotp++ = L'\0';
|
|
if (r > rdse)
|
|
*r++ = L',';
|
|
r = wcpcpy (r, L"DC=");
|
|
r = wcpcpy (r, domain);
|
|
}
|
|
}
|
|
attr = group ? group_attr : user_attr;
|
|
if ((ret = ldap_search_stW (lh, rdse, LDAP_SCOPE_SUBTREE, filter,
|
|
attr, 0, &def_tv, &msg)) != LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_search_stW(%W,%W) error 0x%02x",
|
|
rdse, filter, ret);
|
|
return false;
|
|
}
|
|
if (!(entry = ldap_first_entry (lh, msg)))
|
|
{
|
|
debug_printf ("No entry for %W in rootdse %W", filter, rdse);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::enumerate_ad_accounts (PCWSTR domain, bool group)
|
|
{
|
|
tmp_pathbuf tp;
|
|
PCWSTR filter;
|
|
|
|
close ();
|
|
if (!open (domain))
|
|
return false;
|
|
|
|
if (!group)
|
|
filter = L"(&(objectClass=User)"
|
|
"(objectCategory=Person)"
|
|
/* 512 == ADS_UF_NORMAL_ACCOUNT */
|
|
"(userAccountControl:" LDAP_MATCHING_RULE_BIT_AND ":=512)"
|
|
"(objectSid=*))";
|
|
else if (!domain)
|
|
filter = L"(&(objectClass=Group)"
|
|
"(objectSid=*))";
|
|
else
|
|
filter = L"(&(objectClass=Group)"
|
|
/* 1 == ACCOUNT_GROUP */
|
|
"(!(groupType:" LDAP_MATCHING_RULE_BIT_AND ":=1))"
|
|
"(objectSid=*))";
|
|
srch_id = ldap_search_init_pageW (lh, rootdse, LDAP_SCOPE_SUBTREE,
|
|
(PWCHAR) filter, sid_attr, 0,
|
|
NULL, NULL, CYG_LDAP_ENUM_TIMEOUT,
|
|
CYG_LDAP_ENUM_PAGESIZE, NULL);
|
|
if (srch_id == NULL)
|
|
{
|
|
debug_printf ("ldap_search_init_pageW(%W,%W) error 0x%02x",
|
|
rootdse, filter, LdapGetLastError ());
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::next_account (cygsid &sid)
|
|
{
|
|
ULONG ret;
|
|
PLDAP_BERVAL *bval;
|
|
|
|
ULONG total;
|
|
|
|
if (srch_entry)
|
|
{
|
|
if ((srch_entry = ldap_next_entry (lh, srch_entry))
|
|
&& (bval = ldap_get_values_lenW (lh, srch_entry, sid_attr[0])))
|
|
{
|
|
sid = (PSID) bval[0]->bv_val;
|
|
ldap_value_free_len (bval);
|
|
return true;
|
|
}
|
|
ldap_msgfree (srch_msg);
|
|
srch_msg = srch_entry = NULL;
|
|
}
|
|
do
|
|
{
|
|
ret = ldap_get_next_page_s (lh, srch_id, &enum_tv, CYG_LDAP_ENUM_PAGESIZE,
|
|
&total, &srch_msg);
|
|
}
|
|
while (ret == LDAP_SUCCESS && ldap_count_entries (lh, srch_msg) == 0);
|
|
if (ret == LDAP_NO_RESULTS_RETURNED)
|
|
;
|
|
else if (ret != LDAP_SUCCESS)
|
|
debug_printf ("ldap_result() error 0x%02x", ret);
|
|
else if ((srch_entry = ldap_first_entry (lh, srch_msg))
|
|
&& (bval = ldap_get_values_lenW (lh, srch_entry, sid_attr[0])))
|
|
{
|
|
sid = (PSID) bval[0]->bv_val;
|
|
ldap_value_free_len (bval);
|
|
return true;
|
|
}
|
|
ldap_search_abandon_page (lh, srch_id);
|
|
srch_id = NULL;
|
|
return false;
|
|
}
|
|
|
|
uint32_t
|
|
cyg_ldap::fetch_posix_offset_for_domain (PCWSTR domain)
|
|
{
|
|
WCHAR filter[300];
|
|
ULONG ret;
|
|
|
|
if (msg)
|
|
{
|
|
ldap_msgfree (msg);
|
|
msg = entry = NULL;
|
|
}
|
|
if (val)
|
|
{
|
|
ldap_value_freeW (val);
|
|
val = NULL;
|
|
}
|
|
/* If domain name has no dot, it's a Netbios name. In that case, filter
|
|
by flatName rather than by name. */
|
|
__small_swprintf (filter, L"(&(objectClass=trustedDomain)(%W=%W))",
|
|
wcschr (domain, L'.') ? L"name" : L"flatName", domain);
|
|
if ((ret = ldap_search_stW (lh, rootdse, LDAP_SCOPE_SUBTREE, filter,
|
|
attr = tdom_attr, 0, &def_tv, &msg))
|
|
!= LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_search_stW(%W,%W) error 0x%02x",
|
|
rootdse, filter, ret);
|
|
return 0;
|
|
}
|
|
if (!(entry = ldap_first_entry (lh, msg)))
|
|
{
|
|
debug_printf ("No entry for %W in rootdse %W", filter, rootdse);
|
|
return 0;
|
|
}
|
|
return get_num_attribute (0);
|
|
}
|
|
|
|
PWCHAR
|
|
cyg_ldap::get_string_attribute (int idx)
|
|
{
|
|
if (val)
|
|
ldap_value_freeW (val);
|
|
val = ldap_get_valuesW (lh, entry, attr[idx]);
|
|
if (val)
|
|
return val[0];
|
|
return NULL;
|
|
}
|
|
|
|
uint32_t
|
|
cyg_ldap::get_num_attribute (int idx)
|
|
{
|
|
PWCHAR ret = get_string_attribute (idx);
|
|
if (ret)
|
|
return (uint32_t) wcstoul (ret, NULL, 10);
|
|
return (uint32_t) -1;
|
|
}
|
|
|
|
bool
|
|
cyg_ldap::fetch_unix_sid_from_ad (uint32_t id, cygsid &sid, bool group)
|
|
{
|
|
WCHAR filter[48];
|
|
ULONG ret;
|
|
PLDAP_BERVAL *bval;
|
|
|
|
if (msg)
|
|
{
|
|
ldap_msgfree (msg);
|
|
msg = entry = NULL;
|
|
}
|
|
if (group)
|
|
__small_swprintf (filter, L"(&(objectClass=Group)(gidNumber=%u))", id);
|
|
else
|
|
__small_swprintf (filter, L"(&(objectClass=User)(uidNumber=%u))", id);
|
|
if ((ret = ldap_search_stW (lh, rootdse, LDAP_SCOPE_SUBTREE, filter,
|
|
sid_attr, 0, &def_tv, &msg)) != LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_search_stW(%W,%W) error 0x%02x",
|
|
rootdse, filter, ret);
|
|
return false;
|
|
}
|
|
if ((entry = ldap_first_entry (lh, msg))
|
|
&& (bval = ldap_get_values_lenW (lh, entry, sid_attr[0])))
|
|
{
|
|
sid = (PSID) bval[0]->bv_val;
|
|
ldap_value_free_len (bval);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
PWCHAR
|
|
cyg_ldap::fetch_unix_name_from_rfc2307 (uint32_t id, bool group)
|
|
{
|
|
WCHAR filter[52];
|
|
ULONG ret;
|
|
|
|
if (msg)
|
|
{
|
|
ldap_msgfree (msg);
|
|
msg = entry = NULL;
|
|
}
|
|
if (val)
|
|
{
|
|
ldap_value_freeW (val);
|
|
val = NULL;
|
|
}
|
|
attr = group ? rfc2307_gid_attr : rfc2307_uid_attr;
|
|
if (group)
|
|
__small_swprintf (filter, L"(&(objectClass=posixGroup)(gidNumber=%u))", id);
|
|
else
|
|
__small_swprintf (filter, L"(&(objectClass=posixAccount)(uidNumber=%u))",
|
|
id);
|
|
if ((ret = ldap_search_stW (lh, rootdse, LDAP_SCOPE_SUBTREE, filter, attr,
|
|
0, &def_tv, &msg)) != LDAP_SUCCESS)
|
|
{
|
|
debug_printf ("ldap_search_stW(%W,%W) error 0x%02x",
|
|
rootdse, filter, ret);
|
|
return NULL;
|
|
}
|
|
if (!(entry = ldap_first_entry (lh, msg)))
|
|
{
|
|
debug_printf ("No entry for %W in rootdse %W", filter, rootdse);
|
|
return NULL;
|
|
}
|
|
return get_string_attribute (0);
|
|
}
|
|
|
|
uid_t
|
|
cyg_ldap::remap_uid (uid_t uid)
|
|
{
|
|
cygsid user (NO_SID);
|
|
PWCHAR name;
|
|
struct passwd *pw;
|
|
|
|
if (isAD)
|
|
{
|
|
if (fetch_unix_sid_from_ad (uid, user, false)
|
|
&& user != NO_SID
|
|
&& (pw = internal_getpwsid (user, this)))
|
|
return pw->pw_uid;
|
|
}
|
|
else if ((name = fetch_unix_name_from_rfc2307 (uid, false)))
|
|
{
|
|
char *mbname = NULL;
|
|
sys_wcstombs_alloc (&mbname, HEAP_NOTHEAP, name);
|
|
if ((pw = internal_getpwnam (mbname)))
|
|
return pw->pw_uid;
|
|
}
|
|
return ILLEGAL_UID;
|
|
}
|
|
|
|
gid_t
|
|
cyg_ldap::remap_gid (gid_t gid)
|
|
{
|
|
cygsid group (NO_SID);
|
|
PWCHAR name;
|
|
struct group *gr;
|
|
|
|
if (isAD)
|
|
{
|
|
if (fetch_unix_sid_from_ad (gid, group, true)
|
|
&& group != NO_SID
|
|
&& (gr = internal_getgrsid (group, this)))
|
|
return gr->gr_gid;
|
|
}
|
|
else if ((name = fetch_unix_name_from_rfc2307 (gid, true)))
|
|
{
|
|
char *mbname = NULL;
|
|
sys_wcstombs_alloc (&mbname, HEAP_NOTHEAP, name);
|
|
if ((gr = internal_getgrnam (mbname)))
|
|
return gr->gr_gid;
|
|
}
|
|
return ILLEGAL_GID;
|
|
}
|