737 lines
16 KiB
C++
737 lines
16 KiB
C++
/* passwd.cc: getpwnam () and friends
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Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
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2009, 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <lm.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "pinfo.h"
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#include "cygheap.h"
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#include "shared_info.h"
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#include "miscfuncs.h"
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#include "ldap.h"
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#include "tls_pbuf.h"
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/* Parse /etc/passwd line into passwd structure. */
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bool
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pwdgrp::parse_passwd ()
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{
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pg_pwd &res = passwd ()[curr_lines];
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res.p.pw_name = next_str (':');
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res.p.pw_passwd = next_str (':');
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if (!next_num (res.p.pw_uid))
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return false;
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if (!next_num (res.p.pw_gid))
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return false;
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res.p.pw_comment = NULL;
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res.p.pw_gecos = next_str (':');
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res.p.pw_dir = next_str (':');
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res.p.pw_shell = next_str (':');
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res.sid.getfrompw (&res.p);
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return true;
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}
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void
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pwdgrp::init_pwd ()
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{
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pwdgrp_buf_elem_size = sizeof (pg_pwd);
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parse = &pwdgrp::parse_passwd;
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}
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pwdgrp *
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pwdgrp::prep_tls_pwbuf ()
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{
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if (!_my_tls.locals.pwbuf)
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{
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_my_tls.locals.pwbuf = ccalloc_abort (HEAP_BUF, 1,
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sizeof (pwdgrp) + sizeof (pg_pwd));
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pwdgrp *pw = (pwdgrp *) _my_tls.locals.pwbuf;
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pw->init_pwd ();
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pw->pwdgrp_buf = (void *) (pw + 1);
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pw->max_lines = 1;
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}
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pwdgrp *pw = (pwdgrp *) _my_tls.locals.pwbuf;
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if (pw->curr_lines)
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{
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cfree (pw->passwd ()[0].p.pw_name);
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pw->curr_lines = 0;
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}
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return pw;
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}
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struct passwd *
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pwdgrp::find_user (cygpsid &sid)
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{
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for (ULONG i = 0; i < curr_lines; i++)
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if (sid == passwd ()[i].sid)
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return &passwd ()[i].p;
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return NULL;
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}
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struct passwd *
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pwdgrp::find_user (const char *name)
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{
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for (ULONG i = 0; i < curr_lines; i++)
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/* on Windows NT user names are case-insensitive */
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if (strcasematch (name, passwd ()[i].p.pw_name))
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return &passwd ()[i].p;
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return NULL;
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}
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struct passwd *
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pwdgrp::find_user (uid_t uid)
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{
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for (ULONG i = 0; i < curr_lines; i++)
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if (uid == passwd ()[i].p.pw_uid)
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return &passwd ()[i].p;
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return NULL;
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}
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struct passwd *
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internal_getpwsid (cygpsid &sid)
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{
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struct passwd *ret;
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cygheap->pg.nss_init ();
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if (cygheap->pg.nss_pwd_files ())
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{
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cygheap->pg.pwd_cache.file.check_file (false);
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if ((ret = cygheap->pg.pwd_cache.file.find_user (sid)))
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return ret;
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if ((ret = cygheap->pg.pwd_cache.file.add_user_from_file (sid)))
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return ret;
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}
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if (cygheap->pg.nss_pwd_db ())
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{
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if ((ret = cygheap->pg.pwd_cache.win.find_user (sid)))
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return ret;
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return cygheap->pg.pwd_cache.win.add_user_from_windows (sid);
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}
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return NULL;
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}
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struct passwd *
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internal_getpwnam (const char *name)
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{
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struct passwd *ret;
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cygheap->pg.nss_init ();
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if (cygheap->pg.nss_pwd_files ())
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{
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cygheap->pg.pwd_cache.file.check_file (false);
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if ((ret = cygheap->pg.pwd_cache.file.find_user (name)))
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return ret;
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if ((ret = cygheap->pg.pwd_cache.file.add_user_from_file (name)))
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return ret;
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}
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if (cygheap->pg.nss_pwd_db ())
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{
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if ((ret = cygheap->pg.pwd_cache.win.find_user (name)))
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return ret;
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return cygheap->pg.pwd_cache.win.add_user_from_windows (name);
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}
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return NULL;
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}
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struct passwd *
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internal_getpwuid (uid_t uid)
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{
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struct passwd *ret;
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cygheap->pg.nss_init ();
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if (cygheap->pg.nss_pwd_files ())
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{
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cygheap->pg.pwd_cache.file.check_file (false);
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if ((ret = cygheap->pg.pwd_cache.file.find_user (uid)))
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return ret;
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if ((ret = cygheap->pg.pwd_cache.file.add_user_from_file (uid)))
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return ret;
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}
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if (cygheap->pg.nss_pwd_db ())
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{
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if ((ret = cygheap->pg.pwd_cache.win.find_user (uid)))
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return ret;
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return cygheap->pg.pwd_cache.win.add_user_from_windows (uid);
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}
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else if (uid == ILLEGAL_UID)
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return cygheap->pg.pwd_cache.win.add_user_from_windows (uid);
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return NULL;
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}
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extern "C" struct passwd *
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getpwuid32 (uid_t uid)
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{
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struct passwd *temppw = internal_getpwuid (uid);
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pthread_testcancel ();
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return temppw;
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}
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#ifdef __x86_64__
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EXPORT_ALIAS (getpwuid32, getpwuid)
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#else
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extern "C" struct passwd *
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getpwuid (__uid16_t uid)
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{
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return getpwuid32 (uid16touid32 (uid));
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}
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#endif
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extern "C" int
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getpwuid_r32 (uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
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{
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*result = NULL;
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if (!pwd || !buffer)
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return ERANGE;
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struct passwd *temppw = internal_getpwuid (uid);
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pthread_testcancel ();
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if (!temppw)
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return 0;
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/* check needed buffer size. */
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size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_passwd)
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+ strlen (temppw->pw_gecos) + strlen (temppw->pw_dir)
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+ strlen (temppw->pw_shell) + 5;
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if (needsize > bufsize)
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return ERANGE;
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/* make a copy of temppw */
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*result = pwd;
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pwd->pw_uid = temppw->pw_uid;
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pwd->pw_gid = temppw->pw_gid;
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buffer = stpcpy (pwd->pw_name = buffer, temppw->pw_name);
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buffer = stpcpy (pwd->pw_passwd = buffer + 1, temppw->pw_passwd);
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buffer = stpcpy (pwd->pw_gecos = buffer + 1, temppw->pw_gecos);
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buffer = stpcpy (pwd->pw_dir = buffer + 1, temppw->pw_dir);
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stpcpy (pwd->pw_shell = buffer + 1, temppw->pw_shell);
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pwd->pw_comment = NULL;
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return 0;
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}
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#ifdef __x86_64__
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EXPORT_ALIAS (getpwuid_r32, getpwuid_r)
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#else
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extern "C" int
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getpwuid_r (__uid16_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
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{
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return getpwuid_r32 (uid16touid32 (uid), pwd, buffer, bufsize, result);
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}
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#endif
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extern "C" struct passwd *
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getpwnam (const char *name)
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{
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struct passwd *temppw = internal_getpwnam (name);
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pthread_testcancel ();
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return temppw;
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}
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/* the max size buffer we can expect to
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* use is returned via sysconf with _SC_GETPW_R_SIZE_MAX.
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* This may need updating! - Rob Collins April 2001.
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*/
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extern "C" int
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getpwnam_r (const char *nam, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
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{
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*result = NULL;
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if (!pwd || !buffer || !nam)
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return ERANGE;
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struct passwd *temppw = internal_getpwnam (nam);
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pthread_testcancel ();
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if (!temppw)
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return 0;
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/* check needed buffer size. */
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size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_passwd)
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+ strlen (temppw->pw_gecos) + strlen (temppw->pw_dir)
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+ strlen (temppw->pw_shell) + 5;
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if (needsize > bufsize)
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return ERANGE;
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/* make a copy of temppw */
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*result = pwd;
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pwd->pw_uid = temppw->pw_uid;
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pwd->pw_gid = temppw->pw_gid;
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buffer = stpcpy (pwd->pw_name = buffer, temppw->pw_name);
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buffer = stpcpy (pwd->pw_passwd = buffer + 1, temppw->pw_passwd);
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buffer = stpcpy (pwd->pw_gecos = buffer + 1, temppw->pw_gecos);
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buffer = stpcpy (pwd->pw_dir = buffer + 1, temppw->pw_dir);
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stpcpy (pwd->pw_shell = buffer + 1, temppw->pw_shell);
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pwd->pw_comment = NULL;
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return 0;
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}
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/* getpwent functions are not reentrant. */
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static pw_ent pwent;
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void
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pg_ent::clear_cache ()
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{
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if (pg.curr_lines)
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{
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if (state > from_file)
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cfree (group ? grp.g.gr_name : pwd.p.pw_name);
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pg.curr_lines = 0;
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}
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}
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void
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pg_ent::setent (bool _group, int _enums, PCWSTR _enum_tdoms)
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{
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endent (_group);
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if (!_enums && !_enum_tdoms)
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{
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enums = cygheap->pg.nss_db_enums ();
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enum_tdoms = cygheap->pg.nss_db_enum_tdoms ();
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}
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else
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{
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enums = _enums;
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enum_tdoms = _enum_tdoms;
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}
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if (_group)
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{
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from_files = cygheap->pg.nss_grp_files ();
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from_db = cygheap->pg.nss_grp_db ();
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}
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else
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{
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from_files = cygheap->pg.nss_pwd_files ();
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from_db = cygheap->pg.nss_pwd_db ();
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}
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state = from_cache;
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}
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void *
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pg_ent::getent (void)
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{
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void *entry;
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switch (state)
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{
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case rewound:
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state = from_cache;
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/*FALLTHRU*/
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case from_cache:
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if (nss_db_enum_caches ()
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&& (entry = enumerate_caches ()))
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return entry;
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state = from_file;
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/*FALLTHRU*/
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case from_file:
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if (from_files
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&& nss_db_enum_files ()
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&& (entry = enumerate_file ()))
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return entry;
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state = from_builtin;
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/*FALLTHRU*/
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case from_builtin:
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if (from_db
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&& nss_db_enum_builtin ()
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&& (entry = enumerate_builtin ()))
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return entry;
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state = from_local;
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/*FALLTHRU*/
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case from_local:
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if (from_db
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&& nss_db_enum_local ()
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&& (!cygheap->dom.member_machine ()
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|| !nss_db_enum_primary ())
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&& (entry = enumerate_local ()))
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return entry;
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state = from_sam;
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/*FALLTHRU*/
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case from_sam:
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if (from_db
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&& nss_db_enum_local ()
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/* Domain controller? If so, sam and ad are one and the same
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and "local ad" would list all domain accounts twice without
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this test. */
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&& (cygheap->dom.account_flat_name ()[0] != L'@'
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|| !nss_db_enum_primary ())
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&& (entry = enumerate_sam ()))
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return entry;
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state = from_ad;
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/*FALLTHRU*/
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case from_ad:
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if (cygheap->dom.member_machine ()
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&& from_db
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&& (entry = enumerate_ad ()))
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return entry;
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state = finished;
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/*FALLTHRU*/
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case finished:
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break;
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}
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return NULL;
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}
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void
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pg_ent::endent (bool _group)
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{
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if (buf)
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{
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if (state == from_file)
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free (buf);
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else if (state == from_local || state == from_sam)
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NetApiBufferFree (buf);
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buf = NULL;
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}
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if (!pg.curr_lines)
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{
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if ((group = _group))
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{
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pg.init_grp ();
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pg.pwdgrp_buf = (void *) &grp;
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}
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else
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{
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pg.init_pwd ();
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pg.pwdgrp_buf = (void *) &pwd;
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}
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pg.max_lines = 1;
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}
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else
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clear_cache ();
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cldap.close ();
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rl.close ();
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cnt = max = resume = 0;
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enums = 0;
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enum_tdoms = NULL;
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state = rewound;
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}
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void *
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pg_ent::enumerate_file ()
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{
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void *entry;
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if (!cnt)
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{
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pwdgrp &prf = group ? cygheap->pg.grp_cache.file
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: cygheap->pg.pwd_cache.file;
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if (prf.check_file (group))
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{
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if (!buf)
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buf = (char *) malloc (NT_MAX_PATH);
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if (buf
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&& !rl.init (prf.file_attr (), buf, NT_MAX_PATH))
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{
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free (buf);
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buf = NULL;
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}
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}
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}
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++cnt;
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if ((entry = pg.add_account_post_fetch (rl.gets (), false)))
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return entry;
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rl.close ();
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free (buf);
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buf = NULL;
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cnt = max = resume = 0;
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return NULL;
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}
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void *
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pg_ent::enumerate_builtin ()
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{
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static const char *pwd_builtins[] = {
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/* SYSTEM */
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"S-1-5-18",
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/* LocalService */
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"S-1-5-19",
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/* NetworkService */
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"S-1-5-20",
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/* Administrators */
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"S-1-5-32-544",
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/* TrustedInstaller */
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"S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464",
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/* The end */
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NULL
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};
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static const char *grp_builtins[] = {
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/* SYSTEM */
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"S-1-5-18",
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/* TrustedInstaller */
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"S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464",
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/* The end */
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NULL
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};
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const char **builtins = group ? grp_builtins : pwd_builtins;
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if (!builtins[cnt])
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{
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cnt = max = resume = 0;
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return NULL;
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}
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cygsid sid (builtins[cnt++]);
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fetch_user_arg_t arg;
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arg.type = SID_arg;
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arg.sid = &sid;
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char *line = pg.fetch_account_from_windows (arg, group);
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return pg.add_account_post_fetch (line, false);
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}
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void *
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pg_ent::enumerate_sam ()
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{
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while (true)
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{
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if (!cnt)
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{
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DWORD total;
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NET_API_STATUS ret;
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if (buf)
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{
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NetApiBufferFree (buf);
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buf = NULL;
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}
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if (resume == ULONG_MAX)
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ret = ERROR_NO_MORE_ITEMS;
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else if (group)
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ret = NetGroupEnum (NULL, 2, (PBYTE *) &buf, MAX_PREFERRED_LENGTH,
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&max, &total, &resume);
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else
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ret = NetUserEnum (NULL, 20, FILTER_NORMAL_ACCOUNT, (PBYTE *) &buf,
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MAX_PREFERRED_LENGTH, &max, &total,
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(PDWORD) &resume);
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if (ret == NERR_Success)
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resume = ULONG_MAX;
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else if (ret != ERROR_MORE_DATA)
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{
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cnt = max = resume = 0;
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return NULL;
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}
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}
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while (cnt < max)
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{
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cygsid sid (cygheap->dom.account_sid ());
|
|
sid_sub_auth (sid, sid_sub_auth_count (sid)) =
|
|
group ? ((PGROUP_INFO_2) buf)[cnt].grpi2_group_id
|
|
: ((PUSER_INFO_20) buf)[cnt].usri20_user_id;
|
|
++cnt;
|
|
++sid_sub_auth_count (sid);
|
|
fetch_user_arg_t arg;
|
|
arg.type = SID_arg;
|
|
arg.sid = &sid;
|
|
char *line = pg.fetch_account_from_windows (arg, group);
|
|
if (line)
|
|
return pg.add_account_post_fetch (line, false);
|
|
}
|
|
cnt = 0;
|
|
}
|
|
}
|
|
|
|
void *
|
|
pg_ent::enumerate_ad ()
|
|
{
|
|
while (true)
|
|
{
|
|
if (!cnt)
|
|
{
|
|
PDS_DOMAIN_TRUSTSW td;
|
|
|
|
if (!resume)
|
|
{
|
|
if (!cldap.open (NULL))
|
|
return NULL;
|
|
++resume;
|
|
if (!nss_db_enum_primary ()
|
|
|| !cldap.enumerate_ad_accounts (NULL, group))
|
|
continue;
|
|
}
|
|
else if ((td = cygheap->dom.trusted_domain (resume - 1)))
|
|
{
|
|
++resume;
|
|
if ((td->Flags & DS_DOMAIN_PRIMARY)
|
|
|| !td->DomainSid
|
|
|| (!nss_db_enum_tdom (td->NetbiosDomainName)
|
|
&& !nss_db_enum_tdom (td->DnsDomainName))
|
|
|| !cldap.enumerate_ad_accounts (td->DnsDomainName, group))
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
cldap.close ();
|
|
return NULL;
|
|
}
|
|
}
|
|
++cnt;
|
|
cygsid sid;
|
|
if (cldap.next_account (sid))
|
|
{
|
|
fetch_user_arg_t arg;
|
|
arg.type = SID_arg;
|
|
arg.sid = &sid;
|
|
char *line = pg.fetch_account_from_windows (arg, group);
|
|
if (line)
|
|
return pg.add_account_post_fetch (line, false);
|
|
}
|
|
cnt = 0;
|
|
}
|
|
}
|
|
|
|
void *
|
|
pw_ent::enumerate_caches ()
|
|
{
|
|
if (!max && from_files)
|
|
{
|
|
pwdgrp &prf = cygheap->pg.pwd_cache.file;
|
|
prf.check_file (false);
|
|
if (cnt < prf.cached_users ())
|
|
return &prf.passwd ()[cnt++].p;
|
|
cnt = 0;
|
|
max = 1;
|
|
}
|
|
if (from_db && cygheap->pg.nss_db_caching ())
|
|
{
|
|
pwdgrp &prw = cygheap->pg.pwd_cache.win;
|
|
if (cnt < prw.cached_users ())
|
|
return &prw.passwd ()[cnt++].p;
|
|
}
|
|
cnt = max = 0;
|
|
return NULL;
|
|
}
|
|
|
|
void *
|
|
pw_ent::enumerate_local ()
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
struct passwd *
|
|
pw_ent::getpwent (void)
|
|
{
|
|
if (state == rewound)
|
|
setent (false);
|
|
else
|
|
clear_cache ();
|
|
return (struct passwd *) getent ();
|
|
}
|
|
|
|
extern "C" void
|
|
setpwent ()
|
|
{
|
|
pwent.setpwent ();
|
|
}
|
|
|
|
extern "C" struct passwd *
|
|
getpwent (void)
|
|
{
|
|
return pwent.getpwent ();
|
|
}
|
|
|
|
extern "C" void
|
|
endpwent (void)
|
|
{
|
|
pwent.endpwent ();
|
|
}
|
|
|
|
/* *_filtered functions are called from mkpasswd */
|
|
void *
|
|
setpwent_filtered (int enums, PCWSTR enum_tdoms)
|
|
{
|
|
pw_ent *pw = new pw_ent;
|
|
if (pw)
|
|
pw->setpwent (enums, enum_tdoms);
|
|
return (void *) pw;
|
|
}
|
|
|
|
void *
|
|
getpwent_filtered (void *pw)
|
|
{
|
|
return (void *) ((pw_ent *) pw)->getpwent ();
|
|
}
|
|
|
|
void
|
|
endpwent_filtered (void *pw)
|
|
{
|
|
((pw_ent *) pw)->endpwent ();
|
|
}
|
|
|
|
#ifndef __x86_64__
|
|
extern "C" struct passwd *
|
|
getpwduid (__uid16_t)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
extern "C" int
|
|
setpassent (int)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_getpass_close_fd (void *arg)
|
|
{
|
|
if (arg)
|
|
fclose ((FILE *) arg);
|
|
}
|
|
|
|
extern "C" char *
|
|
getpass (const char * prompt)
|
|
{
|
|
char *pass = _my_tls.locals.pass;
|
|
struct termios ti, newti;
|
|
bool tc_set = false;
|
|
|
|
/* Try to use controlling tty in the first place. Use stdin and stderr
|
|
only as fallback. */
|
|
FILE *in = stdin, *err = stderr;
|
|
FILE *tty = fopen ("/dev/tty", "w+b");
|
|
pthread_cleanup_push (_getpass_close_fd, tty);
|
|
if (tty)
|
|
{
|
|
/* Set close-on-exec for obvious reasons. */
|
|
fcntl (fileno (tty), F_SETFD, fcntl (fileno (tty), F_GETFD) | FD_CLOEXEC);
|
|
in = err = tty;
|
|
}
|
|
|
|
/* Make sure to notice if stdin is closed. */
|
|
if (fileno (in) >= 0)
|
|
{
|
|
flockfile (in);
|
|
/* Change tty attributes if possible. */
|
|
if (!tcgetattr (fileno (in), &ti))
|
|
{
|
|
newti = ti;
|
|
newti.c_lflag &= ~(ECHO | ISIG); /* No echo, no signal handling. */
|
|
if (!tcsetattr (fileno (in), TCSANOW, &newti))
|
|
tc_set = true;
|
|
}
|
|
fputs (prompt, err);
|
|
fflush (err);
|
|
fgets (pass, _PASSWORD_LEN, in);
|
|
fprintf (err, "\n");
|
|
if (tc_set)
|
|
tcsetattr (fileno (in), TCSANOW, &ti);
|
|
funlockfile (in);
|
|
char *crlf = strpbrk (pass, "\r\n");
|
|
if (crlf)
|
|
*crlf = '\0';
|
|
}
|
|
pthread_cleanup_pop (1);
|
|
return pass;
|
|
}
|