mirror of
https://github.com/samba-team/samba.git
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f203358fdb
(the actual call to crack was already in this #ifdef)
Andrew Bartlett
(This used to be commit 4a01f3dbb4
)
1006 lines
26 KiB
C
1006 lines
26 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Andrew Bartlett 2001-2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* fork a child process to exec passwd and write to its
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* tty to change a users password. This is running as the
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* user who is attempting to change the password.
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*/
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/*
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* This code was copied/borrowed and stolen from various sources.
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* The primary source was the poppasswd.c from the authors of POPMail. This software
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* was included as a client to change passwords using the 'passwd' program
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* on the remote machine.
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*
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* This routine is called by set_user_password() in password.c only if ALLOW_PASSWORD_CHANGE
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* is defined in the compiler directives located in the Makefile.
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*
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* This code has been hacked by Bob Nance (nance@niehs.nih.gov) and Evan Patterson
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* (patters2@niehs.nih.gov) at the National Institute of Environmental Health Sciences
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* and rights to modify, distribute or incorporate this change to the CAP suite or
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* using it for any other reason are granted, so long as this disclaimer is left intact.
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*/
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/*
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This code was hacked considerably for inclusion in Samba, primarily
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by Andrew.Tridgell@anu.edu.au. The biggest change was the addition
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of the "password chat" option, which allows the easy runtime
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specification of the expected sequence of events to change a
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password.
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*/
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#include "includes.h"
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#ifdef HAVE_WORKING_CRACKLIB
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#include <crack.h>
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#ifndef HAVE_CRACKLIB_DICTPATH
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#ifndef CRACKLIB_DICTPATH
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#define CRACKLIB_DICTPATH SAMBA_CRACKLIB_DICTPATH
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#endif
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#endif
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#endif
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extern struct passdb_ops pdb_ops;
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static NTSTATUS check_oem_password(const char *user,
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uchar * lmdata, const uchar * lmhash,
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const uchar * ntdata, const uchar * nthash,
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SAM_ACCOUNT **hnd, char *new_passwd,
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int new_passwd_size);
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#if ALLOW_CHANGE_PASSWORD
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static int findpty(char **slave)
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{
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int master;
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static fstring line;
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DIR *dirp;
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const char *dpname;
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#if defined(HAVE_GRANTPT)
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/* Try to open /dev/ptmx. If that fails, fall through to old method. */
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if ((master = sys_open("/dev/ptmx", O_RDWR, 0)) >= 0)
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{
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grantpt(master);
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unlockpt(master);
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*slave = (char *)ptsname(master);
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if (*slave == NULL)
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{
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DEBUG(0,
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("findpty: Unable to create master/slave pty pair.\n"));
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/* Stop fd leak on error. */
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close(master);
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return -1;
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}
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else
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{
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DEBUG(10,
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("findpty: Allocated slave pty %s\n", *slave));
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return (master);
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}
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}
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#endif /* HAVE_GRANTPT */
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fstrcpy(line, "/dev/ptyXX");
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dirp = opendir("/dev");
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if (!dirp)
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return (-1);
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while ((dpname = readdirname(dirp)) != NULL)
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{
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if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5)
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{
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DEBUG(3,
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("pty: try to open %s, line was %s\n", dpname,
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line));
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line[8] = dpname[3];
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line[9] = dpname[4];
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if ((master = sys_open(line, O_RDWR, 0)) >= 0)
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{
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DEBUG(3, ("pty: opened %s\n", line));
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line[5] = 't';
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*slave = line;
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closedir(dirp);
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return (master);
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}
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}
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}
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closedir(dirp);
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return (-1);
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}
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static int dochild(int master, const char *slavedev, const struct passwd *pass,
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const char *passwordprogram, BOOL as_root)
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{
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int slave;
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struct termios stermios;
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gid_t gid;
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uid_t uid;
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if (pass == NULL)
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{
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DEBUG(0,
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("dochild: user doesn't exist in the UNIX password database.\n"));
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return False;
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}
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gid = pass->pw_gid;
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uid = pass->pw_uid;
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gain_root_privilege();
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/* Start new session - gets rid of controlling terminal. */
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if (setsid() < 0)
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{
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DEBUG(3,
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("Weirdness, couldn't let go of controlling terminal\n"));
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return (False);
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}
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/* Open slave pty and acquire as new controlling terminal. */
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if ((slave = sys_open(slavedev, O_RDWR, 0)) < 0)
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{
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DEBUG(3, ("More weirdness, could not open %s\n", slavedev));
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return (False);
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}
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#ifdef I_PUSH
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ioctl(slave, I_PUSH, "ptem");
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ioctl(slave, I_PUSH, "ldterm");
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#elif defined(TIOCSCTTY)
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if (ioctl(slave, TIOCSCTTY, 0) < 0)
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{
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DEBUG(3, ("Error in ioctl call for slave pty\n"));
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/* return(False); */
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}
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#endif
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/* Close master. */
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close(master);
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/* Make slave stdin/out/err of child. */
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if (sys_dup2(slave, STDIN_FILENO) != STDIN_FILENO)
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{
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DEBUG(3, ("Could not re-direct stdin\n"));
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return (False);
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}
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if (sys_dup2(slave, STDOUT_FILENO) != STDOUT_FILENO)
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{
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DEBUG(3, ("Could not re-direct stdout\n"));
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return (False);
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}
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if (sys_dup2(slave, STDERR_FILENO) != STDERR_FILENO)
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{
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DEBUG(3, ("Could not re-direct stderr\n"));
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return (False);
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}
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if (slave > 2)
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close(slave);
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/* Set proper terminal attributes - no echo, canonical input processing,
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no map NL to CR/NL on output. */
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if (tcgetattr(0, &stermios) < 0)
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{
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DEBUG(3,
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("could not read default terminal attributes on pty\n"));
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return (False);
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}
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stermios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
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stermios.c_lflag |= ICANON;
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#ifdef ONLCR
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stermios.c_oflag &= ~(ONLCR);
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#endif
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if (tcsetattr(0, TCSANOW, &stermios) < 0)
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{
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DEBUG(3, ("could not set attributes of pty\n"));
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return (False);
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}
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/* make us completely into the right uid */
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if (!as_root)
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{
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become_user_permanently(uid, gid);
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}
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DEBUG(10,
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("Invoking '%s' as password change program.\n",
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passwordprogram));
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/* execl() password-change application */
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if (execl("/bin/sh", "sh", "-c", passwordprogram, NULL) < 0)
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{
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DEBUG(3, ("Bad status returned from %s\n", passwordprogram));
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return (False);
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}
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return (True);
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}
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static int expect(int master, char *issue, char *expected)
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{
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pstring buffer;
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int attempts, timeout, nread, len;
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BOOL match = False;
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for (attempts = 0; attempts < 2; attempts++) {
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if (!strequal(issue, ".")) {
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if (lp_passwd_chat_debug())
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DEBUG(100, ("expect: sending [%s]\n", issue));
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if ((len = write(master, issue, strlen(issue))) != strlen(issue)) {
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DEBUG(2,("expect: (short) write returned %d\n", len ));
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return False;
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}
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}
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if (strequal(expected, "."))
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return True;
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/* Initial timeout. */
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timeout = lp_passwd_chat_timeout() * 1000;
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nread = 0;
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buffer[nread] = 0;
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while ((len = read_socket_with_timeout(master, buffer + nread, 1,
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sizeof(buffer) - nread - 1,
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timeout)) > 0) {
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nread += len;
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buffer[nread] = 0;
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{
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/* Eat leading/trailing whitespace before match. */
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pstring str;
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pstrcpy( str, buffer);
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trim_char( str, ' ', ' ');
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if ((match = (unix_wild_match(expected, str) == 0))) {
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/* Now data has started to return, lower timeout. */
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timeout = lp_passwd_chat_timeout() * 100;
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}
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}
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}
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if (lp_passwd_chat_debug())
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DEBUG(100, ("expect: expected [%s] received [%s] match %s\n",
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expected, buffer, match ? "yes" : "no" ));
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if (match)
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break;
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if (len < 0) {
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DEBUG(2, ("expect: %s\n", strerror(errno)));
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return False;
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}
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}
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DEBUG(10,("expect: returning %s\n", match ? "True" : "False" ));
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return match;
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}
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static void pwd_sub(char *buf)
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{
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all_string_sub(buf, "\\n", "\n", 0);
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all_string_sub(buf, "\\r", "\r", 0);
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all_string_sub(buf, "\\s", " ", 0);
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all_string_sub(buf, "\\t", "\t", 0);
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}
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static int talktochild(int master, const char *seq)
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{
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int count = 0;
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fstring issue, expected;
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fstrcpy(issue, ".");
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while (next_token(&seq, expected, NULL, sizeof(expected)))
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{
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pwd_sub(expected);
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count++;
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if (!expect(master, issue, expected))
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{
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DEBUG(3, ("Response %d incorrect\n", count));
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return False;
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}
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if (!next_token(&seq, issue, NULL, sizeof(issue)))
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fstrcpy(issue, ".");
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pwd_sub(issue);
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}
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if (!strequal(issue, ".")) {
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/* we have one final issue to send */
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fstrcpy(expected, ".");
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if (!expect(master, issue, expected))
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return False;
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}
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return (count > 0);
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}
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static BOOL chat_with_program(char *passwordprogram, struct passwd *pass,
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char *chatsequence, BOOL as_root)
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{
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char *slavedev;
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int master;
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pid_t pid, wpid;
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int wstat;
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BOOL chstat = False;
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if (pass == NULL) {
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DEBUG(0, ("chat_with_program: user doesn't exist in the UNIX password database.\n"));
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return False;
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}
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/* allocate a pseudo-terminal device */
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if ((master = findpty(&slavedev)) < 0) {
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DEBUG(3, ("chat_with_program: Cannot Allocate pty for password change: %s\n", pass->pw_name));
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return (False);
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}
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/*
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* We need to temporarily stop CatchChild from eating
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* SIGCLD signals as it also eats the exit status code. JRA.
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*/
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CatchChildLeaveStatus();
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if ((pid = sys_fork()) < 0) {
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DEBUG(3, ("chat_with_program: Cannot fork() child for password change: %s\n", pass->pw_name));
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close(master);
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CatchChild();
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return (False);
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}
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/* we now have a pty */
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if (pid > 0) { /* This is the parent process */
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if ((chstat = talktochild(master, chatsequence)) == False) {
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DEBUG(3, ("chat_with_program: Child failed to change password: %s\n", pass->pw_name));
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kill(pid, SIGKILL); /* be sure to end this process */
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}
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while ((wpid = sys_waitpid(pid, &wstat, 0)) < 0) {
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if (errno == EINTR) {
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errno = 0;
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continue;
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}
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break;
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}
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if (wpid < 0) {
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DEBUG(3, ("chat_with_program: The process is no longer waiting!\n\n"));
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close(master);
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CatchChild();
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return (False);
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}
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/*
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* Go back to ignoring children.
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*/
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CatchChild();
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close(master);
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if (pid != wpid) {
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DEBUG(3, ("chat_with_program: We were waiting for the wrong process ID\n"));
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return (False);
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}
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if (WIFEXITED(wstat) && (WEXITSTATUS(wstat) != 0)) {
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DEBUG(3, ("chat_with_program: The process exited with status %d \
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while we were waiting\n", WEXITSTATUS(wstat)));
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return (False);
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}
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#if defined(WIFSIGNALLED) && defined(WTERMSIG)
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else if (WIFSIGNALLED(wstat)) {
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DEBUG(3, ("chat_with_program: The process was killed by signal %d \
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while we were waiting\n", WTERMSIG(wstat)));
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return (False);
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}
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#endif
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} else {
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/* CHILD */
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/*
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* Lose any oplock capabilities.
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*/
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oplock_set_capability(False, False);
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/* make sure it doesn't freeze */
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alarm(20);
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if (as_root)
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become_root();
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DEBUG(3, ("chat_with_program: Dochild for user %s (uid=%d,gid=%d) (as_root = %s)\n", pass->pw_name,
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(int)getuid(), (int)getgid(), BOOLSTR(as_root) ));
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chstat = dochild(master, slavedev, pass, passwordprogram, as_root);
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if (as_root)
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unbecome_root();
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/*
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* The child should never return from dochild() ....
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*/
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DEBUG(0, ("chat_with_program: Error: dochild() returned %d\n", chstat));
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exit(1);
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}
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if (chstat)
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DEBUG(3, ("chat_with_program: Password change %ssuccessful for user %s\n",
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(chstat ? "" : "un"), pass->pw_name));
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return (chstat);
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}
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BOOL chgpasswd(const char *name, const struct passwd *pass,
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const char *oldpass, const char *newpass, BOOL as_root)
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{
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pstring passwordprogram;
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pstring chatsequence;
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size_t i;
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size_t len;
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if (!oldpass) {
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oldpass = "";
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}
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DEBUG(3, ("chgpasswd: Password change (as_root=%s) for user: %s\n", BOOLSTR(as_root), name));
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#if DEBUG_PASSWORD
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DEBUG(100, ("chgpasswd: Passwords: old=%s new=%s\n", oldpass, newpass));
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#endif
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/* Take the passed information and test it for minimum criteria */
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/* Password is same as old password */
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if (strcmp(oldpass, newpass) == 0) {
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/* don't allow same password */
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DEBUG(2, ("chgpasswd: Password Change: %s, New password is same as old\n", name)); /* log the attempt */
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return (False); /* inform the user */
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}
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/*
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* Check the old and new passwords don't contain any control
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* characters.
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*/
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len = strlen(oldpass);
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for (i = 0; i < len; i++) {
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if (iscntrl((int)oldpass[i])) {
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DEBUG(0, ("chgpasswd: oldpass contains control characters (disallowed).\n"));
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return False;
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}
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}
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len = strlen(newpass);
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for (i = 0; i < len; i++) {
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if (iscntrl((int)newpass[i])) {
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DEBUG(0, ("chgpasswd: newpass contains control characters (disallowed).\n"));
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return False;
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}
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}
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#ifdef WITH_PAM
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if (lp_pam_password_change()) {
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BOOL ret;
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if (as_root)
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become_root();
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if (pass) {
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ret = smb_pam_passchange(pass->pw_name, oldpass, newpass);
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} else {
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ret = smb_pam_passchange(name, oldpass, newpass);
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}
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if (as_root)
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unbecome_root();
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return ret;
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}
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#endif
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/* A non-PAM password change just doen't make sense without a valid local user */
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if (pass == NULL) {
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DEBUG(0, ("chgpasswd: user %s doesn't exist in the UNIX password database.\n", name));
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return False;
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}
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pstrcpy(passwordprogram, lp_passwd_program());
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pstrcpy(chatsequence, lp_passwd_chat());
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if (!*chatsequence) {
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DEBUG(2, ("chgpasswd: Null chat sequence - no password changing\n"));
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return (False);
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}
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if (!*passwordprogram) {
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DEBUG(2, ("chgpasswd: Null password program - no password changing\n"));
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return (False);
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}
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if (as_root) {
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/* The password program *must* contain the user name to work. Fail if not. */
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if (strstr(passwordprogram, "%u") == NULL) {
|
|
DEBUG(0,("chgpasswd: Running as root the 'passwd program' parameter *MUST* contain \
|
|
the string %%u, and the given string %s does not.\n", passwordprogram ));
|
|
return False;
|
|
}
|
|
}
|
|
|
|
pstring_sub(passwordprogram, "%u", name);
|
|
/* note that we do NOT substitute the %o and %n in the password program
|
|
as this would open up a security hole where the user could use
|
|
a new password containing shell escape characters */
|
|
|
|
pstring_sub(chatsequence, "%u", name);
|
|
all_string_sub(chatsequence, "%o", oldpass, sizeof(pstring));
|
|
all_string_sub(chatsequence, "%n", newpass, sizeof(pstring));
|
|
return (chat_with_program
|
|
(passwordprogram, pass, chatsequence, as_root));
|
|
}
|
|
|
|
#else /* ALLOW_CHANGE_PASSWORD */
|
|
|
|
BOOL chgpasswd(const char *name, const struct passwd *pass,
|
|
const char *oldpass, const char *newpass, BOOL as_root)
|
|
{
|
|
DEBUG(0, ("chgpasswd: Password changing not compiled in (user=%s)\n", name));
|
|
return (False);
|
|
}
|
|
#endif /* ALLOW_CHANGE_PASSWORD */
|
|
|
|
/***********************************************************
|
|
Code to check the lanman hashed password.
|
|
************************************************************/
|
|
|
|
BOOL check_lanman_password(char *user, uchar * pass1,
|
|
uchar * pass2, SAM_ACCOUNT **hnd)
|
|
{
|
|
uchar unenc_new_pw[16];
|
|
uchar unenc_old_pw[16];
|
|
SAM_ACCOUNT *sampass = NULL;
|
|
uint16 acct_ctrl;
|
|
const uint8 *lanman_pw;
|
|
BOOL ret;
|
|
|
|
become_root();
|
|
ret = pdb_getsampwnam(sampass, user);
|
|
unbecome_root();
|
|
|
|
if (ret == False) {
|
|
DEBUG(0,("check_lanman_password: getsampwnam returned NULL\n"));
|
|
pdb_free_sam(&sampass);
|
|
return False;
|
|
}
|
|
|
|
acct_ctrl = pdb_get_acct_ctrl (sampass);
|
|
lanman_pw = pdb_get_lanman_passwd (sampass);
|
|
|
|
if (acct_ctrl & ACB_DISABLED) {
|
|
DEBUG(0,("check_lanman_password: account %s disabled.\n", user));
|
|
pdb_free_sam(&sampass);
|
|
return False;
|
|
}
|
|
|
|
if (lanman_pw == NULL) {
|
|
if (acct_ctrl & ACB_PWNOTREQ) {
|
|
/* this saves the pointer for the caller */
|
|
*hnd = sampass;
|
|
return True;
|
|
} else {
|
|
DEBUG(0, ("check_lanman_password: no lanman password !\n"));
|
|
pdb_free_sam(&sampass);
|
|
return False;
|
|
}
|
|
}
|
|
|
|
/* Get the new lanman hash. */
|
|
D_P16(lanman_pw, pass2, unenc_new_pw);
|
|
|
|
/* Use this to get the old lanman hash. */
|
|
D_P16(unenc_new_pw, pass1, unenc_old_pw);
|
|
|
|
/* Check that the two old passwords match. */
|
|
if (memcmp(lanman_pw, unenc_old_pw, 16)) {
|
|
DEBUG(0,("check_lanman_password: old password doesn't match.\n"));
|
|
pdb_free_sam(&sampass);
|
|
return False;
|
|
}
|
|
|
|
/* this saves the pointer for the caller */
|
|
*hnd = sampass;
|
|
return True;
|
|
}
|
|
|
|
/***********************************************************
|
|
Code to change the lanman hashed password.
|
|
It nulls out the NT hashed password as it will
|
|
no longer be valid.
|
|
NOTE this function is designed to be called as root. Check the old password
|
|
is correct before calling. JRA.
|
|
************************************************************/
|
|
|
|
BOOL change_lanman_password(SAM_ACCOUNT *sampass, uchar *pass2)
|
|
{
|
|
static uchar null_pw[16];
|
|
uchar unenc_new_pw[16];
|
|
BOOL ret;
|
|
uint16 acct_ctrl;
|
|
const uint8 *pwd;
|
|
|
|
if (sampass == NULL) {
|
|
DEBUG(0,("change_lanman_password: no smb password entry.\n"));
|
|
return False;
|
|
}
|
|
|
|
acct_ctrl = pdb_get_acct_ctrl(sampass);
|
|
pwd = pdb_get_lanman_passwd(sampass);
|
|
|
|
if (acct_ctrl & ACB_DISABLED) {
|
|
DEBUG(0,("change_lanman_password: account %s disabled.\n",
|
|
pdb_get_username(sampass)));
|
|
return False;
|
|
}
|
|
|
|
if (pwd == NULL) {
|
|
if (acct_ctrl & ACB_PWNOTREQ) {
|
|
uchar no_pw[14];
|
|
memset(no_pw, '\0', 14);
|
|
E_P16(no_pw, null_pw);
|
|
|
|
/* Get the new lanman hash. */
|
|
D_P16(null_pw, pass2, unenc_new_pw);
|
|
} else {
|
|
DEBUG(0,("change_lanman_password: no lanman password !\n"));
|
|
return False;
|
|
}
|
|
} else {
|
|
/* Get the new lanman hash. */
|
|
D_P16(pwd, pass2, unenc_new_pw);
|
|
}
|
|
|
|
if (!pdb_set_lanman_passwd(sampass, unenc_new_pw, PDB_CHANGED)) {
|
|
return False;
|
|
}
|
|
|
|
if (!pdb_set_nt_passwd (sampass, NULL, PDB_CHANGED)) {
|
|
return False; /* We lose the NT hash. Sorry. */
|
|
}
|
|
|
|
if (!pdb_set_pass_changed_now (sampass)) {
|
|
pdb_free_sam(&sampass);
|
|
/* Not quite sure what this one qualifies as, but this will do */
|
|
return False;
|
|
}
|
|
|
|
/* Now flush the sam_passwd struct to persistent storage */
|
|
ret = pdb_update_sam_account (sampass);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/***********************************************************
|
|
Code to check and change the OEM hashed password.
|
|
************************************************************/
|
|
|
|
NTSTATUS pass_oem_change(char *user,
|
|
uchar * lmdata, uchar * lmhash,
|
|
uchar * ntdata, uchar * nthash)
|
|
{
|
|
fstring new_passwd;
|
|
SAM_ACCOUNT *sampass = NULL;
|
|
NTSTATUS nt_status = check_oem_password(user, lmdata, lmhash, ntdata, nthash,
|
|
&sampass, new_passwd, sizeof(new_passwd));
|
|
|
|
if (!NT_STATUS_IS_OK(nt_status))
|
|
return nt_status;
|
|
|
|
/* We've already checked the old password here.... */
|
|
become_root();
|
|
nt_status = change_oem_password(sampass, NULL, new_passwd, True);
|
|
unbecome_root();
|
|
|
|
memset(new_passwd, 0, sizeof(new_passwd));
|
|
|
|
pdb_free_sam(&sampass);
|
|
|
|
return nt_status;
|
|
}
|
|
|
|
/***********************************************************
|
|
Code to check the OEM hashed password.
|
|
|
|
this function ignores the 516 byte nt OEM hashed password
|
|
but does use the lm OEM password to check the nt hashed-hash.
|
|
|
|
************************************************************/
|
|
|
|
static NTSTATUS check_oem_password(const char *user,
|
|
uchar * lmdata, const uchar * lmhash,
|
|
const uchar * ntdata, const uchar * nthash,
|
|
SAM_ACCOUNT **hnd, char *new_passwd,
|
|
int new_passwd_size)
|
|
{
|
|
static uchar null_pw[16];
|
|
static uchar null_ntpw[16];
|
|
SAM_ACCOUNT *sampass = NULL;
|
|
const uint8 *lanman_pw, *nt_pw;
|
|
uint16 acct_ctrl;
|
|
int new_pw_len;
|
|
uchar new_ntp16[16];
|
|
uchar unenc_old_ntpw[16];
|
|
uchar new_p16[16];
|
|
uchar unenc_old_pw[16];
|
|
char no_pw[2];
|
|
BOOL ret;
|
|
|
|
BOOL nt_pass_set = (ntdata != NULL && nthash != NULL);
|
|
|
|
*hnd = NULL;
|
|
|
|
pdb_init_sam(&sampass);
|
|
|
|
become_root();
|
|
ret = pdb_getsampwnam(sampass, user);
|
|
unbecome_root();
|
|
|
|
if (ret == False) {
|
|
DEBUG(0, ("check_oem_password: getsmbpwnam returned NULL\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
/*
|
|
TODO: check what Win2k returns for this:
|
|
return NT_STATUS_NO_SUCH_USER;
|
|
*/
|
|
}
|
|
|
|
acct_ctrl = pdb_get_acct_ctrl(sampass);
|
|
|
|
if (acct_ctrl & ACB_DISABLED) {
|
|
DEBUG(0,("check_lanman_password: account %s disabled.\n", user));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_ACCOUNT_DISABLED;
|
|
}
|
|
|
|
/* construct a null password (in case one is needed */
|
|
no_pw[0] = 0;
|
|
no_pw[1] = 0;
|
|
nt_lm_owf_gen(no_pw, null_ntpw, null_pw);
|
|
|
|
/* save pointers to passwords so we don't have to keep looking them up */
|
|
lanman_pw = pdb_get_lanman_passwd(sampass);
|
|
nt_pw = pdb_get_nt_passwd(sampass);
|
|
|
|
/* check for null passwords */
|
|
if (lanman_pw == NULL) {
|
|
if (!(acct_ctrl & ACB_PWNOTREQ)) {
|
|
DEBUG(0,("check_oem_password: no lanman password !\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
}
|
|
|
|
if (pdb_get_nt_passwd(sampass) == NULL && nt_pass_set) {
|
|
if (!(acct_ctrl & ACB_PWNOTREQ)) {
|
|
DEBUG(0,("check_oem_password: no ntlm password !\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call the hash function to get the new password.
|
|
*/
|
|
SamOEMhash( lmdata, lanman_pw, 516);
|
|
|
|
/*
|
|
* The length of the new password is in the last 4 bytes of
|
|
* the data buffer.
|
|
*/
|
|
|
|
new_pw_len = IVAL(lmdata, 512);
|
|
|
|
if (new_pw_len < 0 || new_pw_len > new_passwd_size - 1) {
|
|
DEBUG(0,("check_oem_password: incorrect password length (%d).\n", new_pw_len));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
|
|
if (nt_pass_set) {
|
|
/*
|
|
* nt passwords are in unicode
|
|
*/
|
|
pull_ucs2(NULL, new_passwd,
|
|
(const smb_ucs2_t *)&lmdata[512 - new_pw_len],
|
|
new_passwd_size, new_pw_len, 0);
|
|
} else {
|
|
memcpy(new_passwd, &lmdata[512 - new_pw_len], new_pw_len);
|
|
new_passwd[new_pw_len] = 0;
|
|
}
|
|
|
|
/*
|
|
* To ensure we got the correct new password, hash it and
|
|
* use it as a key to test the passed old password.
|
|
*/
|
|
|
|
nt_lm_owf_gen(new_passwd, new_ntp16, new_p16);
|
|
|
|
if (!nt_pass_set) {
|
|
/*
|
|
* Now use new_p16 as the key to see if the old
|
|
* password matches.
|
|
*/
|
|
D_P16(new_p16, lmhash, unenc_old_pw);
|
|
|
|
if (memcmp(lanman_pw, unenc_old_pw, 16)) {
|
|
DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
|
|
#ifdef DEBUG_PASSWORD
|
|
DEBUG(100,
|
|
("check_oem_password: password %s ok\n", new_passwd));
|
|
#endif
|
|
*hnd = sampass;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*
|
|
* Now use new_p16 as the key to see if the old
|
|
* password matches.
|
|
*/
|
|
D_P16(new_ntp16, lmhash, unenc_old_pw);
|
|
D_P16(new_ntp16, nthash, unenc_old_ntpw);
|
|
|
|
if (memcmp(lanman_pw, unenc_old_pw, 16)) {
|
|
DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
|
|
if (memcmp(nt_pw, unenc_old_ntpw, 16)) {
|
|
DEBUG(0,("check_oem_password: old nt password doesn't match.\n"));
|
|
pdb_free_sam(&sampass);
|
|
return NT_STATUS_WRONG_PASSWORD;
|
|
}
|
|
#ifdef DEBUG_PASSWORD
|
|
DEBUG(100, ("check_oem_password: password %s ok\n", new_passwd));
|
|
#endif
|
|
|
|
*hnd = sampass;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/***********************************************************
|
|
Code to change the oem password. Changes both the lanman
|
|
and NT hashes. Old_passwd is almost always NULL.
|
|
NOTE this function is designed to be called as root. Check the old password
|
|
is correct before calling. JRA.
|
|
************************************************************/
|
|
|
|
NTSTATUS change_oem_password(SAM_ACCOUNT *hnd, char *old_passwd, char *new_passwd, BOOL as_root)
|
|
{
|
|
struct passwd *pass;
|
|
|
|
BOOL ret;
|
|
uint32 min_len;
|
|
|
|
if (time(NULL) < pdb_get_pass_can_change_time(hnd)) {
|
|
DEBUG(1, ("user %s cannot change password now, must wait until %s\n",
|
|
pdb_get_username(hnd), http_timestring(pdb_get_pass_can_change_time(hnd))));
|
|
return NT_STATUS_PASSWORD_RESTRICTION;
|
|
}
|
|
|
|
if (account_policy_get(AP_MIN_PASSWORD_LEN, &min_len) && (strlen(new_passwd) < min_len)) {
|
|
DEBUG(1, ("user %s cannot change password - password too short\n",
|
|
pdb_get_username(hnd)));
|
|
DEBUGADD(1, (" account policy min password len = %d\n", min_len));
|
|
return NT_STATUS_PASSWORD_RESTRICTION;
|
|
/* return NT_STATUS_PWD_TOO_SHORT; */
|
|
}
|
|
|
|
/* Take the passed information and test it for minimum criteria */
|
|
/* Minimum password length */
|
|
if (strlen(new_passwd) < lp_min_passwd_length()) {
|
|
/* too short, must be at least MINPASSWDLENGTH */
|
|
DEBUG(1, ("Password Change: user %s, New password is shorter than minimum password length = %d\n",
|
|
pdb_get_username(hnd), lp_min_passwd_length()));
|
|
return NT_STATUS_PASSWORD_RESTRICTION;
|
|
/* return NT_STATUS_PWD_TOO_SHORT; */
|
|
}
|
|
|
|
pass = Get_Pwnam(pdb_get_username(hnd));
|
|
if (!pass) {
|
|
DEBUG(1, ("check_oem_password: Username does not exist in system !?!\n"));
|
|
}
|
|
|
|
#ifdef HAVE_WORKING_CRACKLIB
|
|
if (pass) {
|
|
/* if we can, become the user to overcome internal cracklib sillyness */
|
|
if (!push_sec_ctx())
|
|
return NT_STATUS_UNSUCCESSFUL;
|
|
|
|
set_sec_ctx(pass->pw_uid, pass->pw_gid, 0, NULL, NULL);
|
|
set_re_uid();
|
|
}
|
|
|
|
if (lp_use_cracklib()) {
|
|
const char *crack_check_reason;
|
|
DEBUG(4, ("change_oem_password: Checking password for user [%s]"
|
|
" against cracklib. \n", pdb_get_username(hnd)));
|
|
DEBUGADD(4, ("If this is your last message, then something is "
|
|
"wrong with cracklib, it might be missing it's "
|
|
"dictionaries at %s\n",
|
|
CRACKLIB_DICTPATH));
|
|
dbgflush();
|
|
|
|
crack_check_reason = FascistCheck(new_passwd, (char *)CRACKLIB_DICTPATH);
|
|
if (crack_check_reason) {
|
|
DEBUG(1, ("Password Change: user [%s], "
|
|
"New password failed cracklib test - %s\n",
|
|
pdb_get_username(hnd), crack_check_reason));
|
|
|
|
/* get back to where we should be */
|
|
if (pass)
|
|
pop_sec_ctx();
|
|
return NT_STATUS_PASSWORD_RESTRICTION;
|
|
}
|
|
}
|
|
|
|
if (pass)
|
|
pop_sec_ctx();
|
|
#endif
|
|
|
|
/*
|
|
* If unix password sync was requested, attempt to change
|
|
* the /etc/passwd database first. Return failure if this cannot
|
|
* be done.
|
|
*
|
|
* This occurs before the oem change, because we don't want to
|
|
* update it if chgpasswd failed.
|
|
*
|
|
* Conditional on lp_unix_password_sync() because we don't want
|
|
* to touch the unix db unless we have admin permission.
|
|
*/
|
|
|
|
if(lp_unix_password_sync() &&
|
|
!chgpasswd(pdb_get_username(hnd), pass, old_passwd, new_passwd, as_root)) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
if (!pdb_set_plaintext_passwd (hnd, new_passwd)) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
/* Now write it into the file. */
|
|
ret = pdb_update_sam_account (hnd);
|
|
|
|
if (!ret) {
|
|
return NT_STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|