422 lines
11 KiB
C
422 lines
11 KiB
C
/* passwd.c: Changing passwords and managing account information
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Copyright 1999, 2000, 2001, 2002 Red Hat, Inc.
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Written by Corinna Vinschen <corinna.vinschen@cityweb.de>
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <pwd.h>
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#include <sys/types.h>
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#include <time.h>
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#include <windows.h>
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#include <lmaccess.h>
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#include <lmerr.h>
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#include <lmcons.h>
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#include <lmapibuf.h>
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#define USER_PRIV_ADMIN 2
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#define UF_LOCKOUT 0x00010
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static const char version[] = "$Revision$";
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static char *prog_name;
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static struct option longopts[] =
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{
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{"help", no_argument, NULL, 'h' },
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{"inactive", required_argument, NULL, 'i'},
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{"lock", no_argument, NULL, 'l'},
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{"minage", required_argument, NULL, 'n'},
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{"unlock", no_argument, NULL, 'u'},
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{"version", no_argument, NULL, 'v'},
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{"maxage", required_argument, NULL, 'x'},
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{"length", required_argument, NULL, 'L'},
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{"status", no_argument, NULL, 'S'},
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{NULL, 0, NULL, 0}
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};
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static char opts[] = "L:x:n:i:luShv";
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int
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eprint (int with_name, const char *fmt, ...)
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{
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va_list ap;
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if (with_name)
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fprintf(stderr, "%s: ", prog_name);
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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va_end (ap);
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fprintf(stderr, "\n");
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return 1;
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}
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int
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EvalRet (int ret, const char *user)
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{
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switch (ret)
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{
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case NERR_Success:
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return 0;
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case ERROR_ACCESS_DENIED:
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if (! user)
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eprint (0, "You may not change password expiry information.");
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else
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eprint (0, "You may not change the password for %s.", user);
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break;
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eprint (0, "Bad password: Invalid.");
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break;
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case NERR_PasswordTooShort:
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eprint (0, "Bad password: Too short.");
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break;
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case NERR_UserNotFound:
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eprint (1, "unknown user %s", user);
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break;
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case ERROR_INVALID_PASSWORD:
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case NERR_BadPassword:
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eprint (0, "Incorrect password for %s.", user);
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eprint (0, "The password for %s is unchanged.", user);
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break;
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default:
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eprint (1, "unrecoverable error %d", ret);
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break;
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}
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return 1;
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}
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PUSER_INFO_3
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GetPW (const char *user)
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{
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WCHAR name[512];
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DWORD ret;
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PUSER_INFO_3 ui;
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MultiByteToWideChar (CP_ACP, 0, user, -1, name, 512);
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ret = NetUserGetInfo (NULL, name, 3, (LPBYTE *) &ui);
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return EvalRet (ret, user) ? NULL : ui;
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}
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int
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ChangePW (const char *user, const char *oldpwd, const char *pwd, int justcheck)
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{
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WCHAR name[512], oldpass[512], pass[512];
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DWORD ret;
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MultiByteToWideChar (CP_ACP, 0, user, -1, name, 512);
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MultiByteToWideChar (CP_ACP, 0, pwd, -1, pass, 512);
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if (! oldpwd)
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{
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USER_INFO_1003 ui;
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ui.usri1003_password = pass;
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ret = NetUserSetInfo (NULL, name, 1003, (LPBYTE) &ui, NULL);
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}
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else
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{
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MultiByteToWideChar (CP_ACP, 0, oldpwd, -1, oldpass, 512);
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ret = NetUserChangePassword (NULL, name, oldpass, pass);
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}
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if (justcheck && ret != ERROR_INVALID_PASSWORD)
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return 0;
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if (! EvalRet (ret, user) && ! justcheck)
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{
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eprint (0, "Password changed.");
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}
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return ret;
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}
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void
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PrintPW (PUSER_INFO_3 ui)
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{
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time_t t = time (NULL) - ui->usri3_password_age;
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int ret;
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PUSER_MODALS_INFO_0 mi;
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printf ("Account disabled : %s", (ui->usri3_flags & UF_ACCOUNTDISABLE)
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? "yes\n" : "no\n");
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printf ("Password required: %s", (ui->usri3_flags & UF_PASSWD_NOTREQD)
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? "no\n" : "yes\n");
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printf ("Password expired : %s", (ui->usri3_password_expired)
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? "yes\n" : "no\n");
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printf ("Password changed : %s", ctime(&t));
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ret = NetUserModalsGet (NULL, 0, (LPBYTE *) &mi);
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if (! ret)
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{
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if (mi->usrmod0_max_passwd_age == TIMEQ_FOREVER
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|| ui->usri3_priv == USER_PRIV_ADMIN)
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mi->usrmod0_max_passwd_age = 0;
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if (mi->usrmod0_min_passwd_age == TIMEQ_FOREVER
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|| ui->usri3_priv == USER_PRIV_ADMIN)
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mi->usrmod0_min_passwd_age = 0;
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if (mi->usrmod0_force_logoff == TIMEQ_FOREVER
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|| ui->usri3_priv == USER_PRIV_ADMIN)
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mi->usrmod0_force_logoff = 0;
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if (ui->usri3_priv == USER_PRIV_ADMIN)
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mi->usrmod0_min_passwd_len = 0;
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printf ("Max. password age %ld days\n",
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mi->usrmod0_max_passwd_age / ONE_DAY);
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printf ("Min. password age %ld days\n",
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mi->usrmod0_min_passwd_age / ONE_DAY);
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printf ("Force logout after %ld days\n",
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mi->usrmod0_force_logoff / ONE_DAY);
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printf ("Min. password length: %ld\n",
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mi->usrmod0_min_passwd_len);
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}
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}
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int
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SetModals (int xarg, int narg, int iarg, int Larg)
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{
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int ret;
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PUSER_MODALS_INFO_0 mi;
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ret = NetUserModalsGet (NULL, 0, (LPBYTE *) &mi);
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if (! ret)
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{
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if (xarg == 0)
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mi->usrmod0_max_passwd_age = TIMEQ_FOREVER;
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else if (xarg > 0)
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mi->usrmod0_max_passwd_age = xarg * ONE_DAY;
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if (narg == 0)
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{
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mi->usrmod0_min_passwd_age = TIMEQ_FOREVER;
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mi->usrmod0_password_hist_len = 0;
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}
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else if (narg > 0)
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mi->usrmod0_min_passwd_age = narg * ONE_DAY;
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if (iarg == 0)
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mi->usrmod0_force_logoff = TIMEQ_FOREVER;
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else if (iarg > 0)
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mi->usrmod0_force_logoff = iarg * ONE_DAY;
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if (Larg >= 0)
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mi->usrmod0_min_passwd_len = Larg;
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ret = NetUserModalsSet (NULL, 0, (LPBYTE) mi, NULL);
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NetApiBufferFree (mi);
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}
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return EvalRet (ret, NULL);
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}
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static void
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usage (FILE * stream, int status)
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{
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fprintf (stream, ""
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"Usage: %s (-l|-u|-S) [USER]\n"
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" %s [-i NUM] [-n MINDAYS] [-x MAXDAYS] [-L LEN]\n"
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"\n"
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"User operations:\n"
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" -l, --lock lock USER's account\n"
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" -u, --unlock unlock USER's account\n"
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" -S, --status display password status for USER (locked, expired, etc.)\n"
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"\n"
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"System operations:\n"
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" -i, --inactive set NUM of days before inactive accounts are disabled\n"
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" (inactive accounts are those with expired passwords)\n"
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" -n, --minage set system minimum password age to MINDAYS\n"
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" -x, --maxage set system maximum password age to MAXDAYS\n"
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" -L, --length set system minimum password length to LEN\n"
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"\n"
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"Other options:\n"
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" -h, --help output usage information and exit\n"
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" -v, --version output version information and exit\n"
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"", prog_name, prog_name);
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exit (status);
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}
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static void
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print_version ()
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{
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const char *v = strchr (version, ':');
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int len;
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if (!v)
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{
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v = "?";
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len = 1;
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}
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else
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{
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v += 2;
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len = strchr (v, ' ') - v;
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}
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printf ("\
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%s (cygwin) %.*s\n\
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Password Utility\n\
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Copyright 1999, 2000, 2001, 2002 Red Hat, Inc.\n\
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Compiled on %s", prog_name, len, v, __DATE__);
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}
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int
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main (int argc, char **argv)
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{
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char *c;
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char user[64], oldpwd[64], newpwd[64];
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int ret = 0;
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int cnt = 0;
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int opt;
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int Larg = -1;
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int xarg = -1;
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int narg = -1;
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int iarg = -1;
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int lopt = 0;
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int uopt = 0;
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int Sopt = 0;
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PUSER_INFO_3 ui, li;
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prog_name = strrchr (argv[0], '/');
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if (prog_name == NULL)
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prog_name = strrchr (argv[0], '\\');
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if (prog_name == NULL)
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prog_name = argv[0];
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else
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prog_name++;
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c = strrchr (prog_name, '.');
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if (c)
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*c = '\0';
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while ((opt = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
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switch (opt)
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{
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case 'h':
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usage (stdout, 0);
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break;
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case 'i':
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if ((iarg = atoi (optarg)) < 0 || iarg > 999)
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return eprint (1, "Force logout time must be between 0 and 999.");
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break;
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case 'l':
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if (xarg >= 0 || narg >= 0 || iarg >= 0 || Larg >= 0 || uopt || Sopt)
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usage (stderr, 1);
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lopt = 1;
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break;
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case 'n':
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if ((narg = atoi (optarg)) < 0 || narg > 999)
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return eprint (1, "Minimum password age must be between 0 and 999.");
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if (xarg >= 0 && narg > xarg)
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return eprint (1, "Minimum password age must be less than "
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"maximum password age.");
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break;
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case 'u':
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if (xarg >= 0 || narg >= 0 || iarg >= 0 || Larg >= 0 || lopt || Sopt)
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usage (stderr, 1);
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uopt = 1;
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break;
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case 'v':
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print_version ();
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exit (0);
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break;
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case 'x':
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if ((xarg = atoi (optarg)) < 0 || xarg > 999)
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return eprint (1, "Maximum password age must be between 0 and 999.");
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if (narg >= 0 && xarg < narg)
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return eprint (1, "Maximum password age must be greater than "
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"minimum password age.");
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break;
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case 'L':
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if ((Larg = atoi (optarg)) < 0 || Larg > LM20_PWLEN)
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return eprint (1, "Minimum password length must be between "
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"0 and %d.", LM20_PWLEN);
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break;
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case 'S':
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if (xarg >= 0 || narg >= 0 || iarg >= 0 || Larg >= 0 || lopt || uopt)
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usage (stderr, 1);
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Sopt = 1;
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break;
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default:
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usage (stderr, 1);
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}
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if (Larg >= 0 || xarg >= 0 || narg >= 0 || iarg >= 0)
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{
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if (optind < argc)
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usage (stderr, 1);
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return SetModals (xarg, narg, iarg, Larg);
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}
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strcpy (user, optind >= argc ? getlogin () : argv[optind]);
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li = GetPW (getlogin ());
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if (! li)
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return 1;
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ui = GetPW (user);
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if (! ui)
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return 1;
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if (lopt || uopt || Sopt)
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{
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if (li->usri3_priv != USER_PRIV_ADMIN)
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return eprint (0, "You have no maintenance privileges.");
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if (lopt)
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{
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if (ui->usri3_priv == USER_PRIV_ADMIN)
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return eprint (0, "You may not lock an administrators account.");
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ui->usri3_flags |= UF_ACCOUNTDISABLE;
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}
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if (uopt)
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ui->usri3_flags &= ~UF_ACCOUNTDISABLE;
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if (lopt || uopt)
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{
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ret = NetUserSetInfo (NULL, ui->usri3_name, 3, (LPBYTE) ui, NULL);
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return EvalRet (ret, NULL);
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}
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// Sopt
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PrintPW (ui);
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return 0;
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}
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if (li->usri3_priv != USER_PRIV_ADMIN && strcmp (getlogin (), user))
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return eprint (0, "You may not change the password for %s.", user);
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eprint (0, "Enter the new password (minimum of 5, maximum of 8 characters).");
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eprint (0, "Please use a combination of upper and lower case letters and numbers.");
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oldpwd[0] = '\0';
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if (li->usri3_priv != USER_PRIV_ADMIN)
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{
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strcpy (oldpwd, getpass ("Old password: "));
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if (ChangePW (user, oldpwd, oldpwd, 1))
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return 1;
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}
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do
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{
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strcpy (newpwd, getpass ("New password: "));
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if (strcmp (newpwd, getpass ("Re-enter new password: ")))
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eprint (0, "Password is not identical.");
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else if (! ChangePW (user, *oldpwd ? oldpwd : NULL, newpwd, 0))
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ret = 1;
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if (! ret && cnt < 2)
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eprint (0, "Try again.");
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}
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while (! ret && ++cnt < 3);
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return ! ret;
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}
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