+#define OLD_NTDOMAIN 1
+
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ Samba utility functions
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
/* fork a child process to exec passwd and write to its
* tty to change a users password. This is running as the
* user who is attempting to change the password.
extern int DEBUGLEVEL;
-#ifdef ALLOW_CHANGE_PASSWORD
-
-#define MINPASSWDLENGTH 5
-#define BUFSIZE 512
+#if ALLOW_CHANGE_PASSWORD
static int findpty(char **slave)
{
- int master;
-#ifdef SVR4
- extern char *ptsname();
-#else
- static char line[12];
- void *dirp;
- char *dpname;
-#endif
-
-#ifdef SVR4
- if ((master = open("/dev/ptmx", O_RDWR)) >= 1) {
- grantpt(master);
- unlockpt(master);
- *slave = ptsname(master);
- return (master);
- }
-#else
- strcpy( line, "/dev/ptyXX" );
-
- dirp = OpenDir(-1, "/dev", True);
- if (!dirp) return(-1);
- while ((dpname = ReadDirName(dirp)) != NULL) {
- if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5) {
- DEBUG(3,("pty: try to open %s, line was %s\n", dpname, line ) );
- line[8] = dpname[3];
- line[9] = dpname[4];
- if ((master = open(line, O_RDWR)) >= 0) {
- DEBUG(3,("pty: opened %s\n", line ) );
- line[5] = 't';
- *slave = line;
- CloseDir(dirp);
- return (master);
- }
- }
- }
- CloseDir(dirp);
-#endif
- return (-1);
+ int master;
+ static fstring line;
+ DIR *dirp;
+ char *dpname;
+
+#if defined(HAVE_GRANTPT)
+ /* Try to open /dev/ptmx. If that fails, fall through to old method. */
+ if ((master = sys_open("/dev/ptmx", O_RDWR, 0)) >= 0)
+ {
+ grantpt(master);
+ unlockpt(master);
+ *slave = (char *)ptsname(master);
+ if (*slave == NULL)
+ {
+ DEBUG(0,
+ ("findpty: Unable to create master/slave pty pair.\n"));
+ /* Stop fd leak on error. */
+ close(master);
+ return -1;
+ }
+ else
+ {
+ DEBUG(10,
+ ("findpty: Allocated slave pty %s\n", *slave));
+ return (master);
+ }
+ }
+#endif /* HAVE_GRANTPT */
+
+ fstrcpy(line, "/dev/ptyXX");
+
+ dirp = opendir("/dev");
+ if (!dirp)
+ return (-1);
+ while ((dpname = readdirname(dirp)) != NULL)
+ {
+ if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5)
+ {
+ DEBUG(3,
+ ("pty: try to open %s, line was %s\n", dpname,
+ line));
+ line[8] = dpname[3];
+ line[9] = dpname[4];
+ if ((master = sys_open(line, O_RDWR, 0)) >= 0)
+ {
+ DEBUG(3, ("pty: opened %s\n", line));
+ line[5] = 't';
+ *slave = line;
+ closedir(dirp);
+ return (master);
+ }
+ }
+ }
+ closedir(dirp);
+ return (-1);
}
-static int dochild(int master,char *slavedev, char *name, char *passwordprogram)
+static int dochild(int master, char *slavedev, char *name,
+ char *passwordprogram, BOOL as_root)
{
- int slave;
- struct termios stermios;
- struct passwd *pass = Get_Pwnam(name,True);
- int gid = pass->pw_gid;
- int uid = pass->pw_uid;
-
-#ifdef USE_SETRES
- setresuid(0,0,0);
-#else
- setuid(0);
-#endif
-
- /* Start new session - gets rid of controlling terminal. */
- if (setsid() < 0) {
- DEBUG(3,("Weirdness, couldn't let go of controlling terminal\n"));
- return(False);
- }
-
- /* Open slave pty and acquire as new controlling terminal. */
- if ((slave = open(slavedev, O_RDWR)) < 0) {
- DEBUG(3,("More weirdness, could not open %s\n",
- slavedev));
- return(False);
- }
-#ifdef SVR4
- ioctl(slave, I_PUSH, "ptem");
- ioctl(slave, I_PUSH, "ldterm");
-#else
- if (ioctl(slave,TIOCSCTTY,0) <0) {
- DEBUG(3,("Error in ioctl call for slave pty\n"));
- /* return(False); */
- }
-#endif
-
- /* Close master. */
- close(master);
-
- /* Make slave stdin/out/err of child. */
-
- if (dup2(slave, STDIN_FILENO) != STDIN_FILENO) {
- DEBUG(3,("Could not re-direct stdin\n"));
- return(False);
- }
- if (dup2(slave, STDOUT_FILENO) != STDOUT_FILENO) {
- DEBUG(3,("Could not re-direct stdout\n"));
- return(False);
- }
- if (dup2(slave, STDERR_FILENO) != STDERR_FILENO) {
- DEBUG(3,("Could not re-direct stderr\n"));
- return(False);
- }
- if (slave > 2) close(slave);
-
- /* Set proper terminal attributes - no echo, canonical input processing,
- no map NL to CR/NL on output. */
-
- if (tcgetattr(0, &stermios) < 0) {
- DEBUG(3,("could not read default terminal attributes on pty\n"));
- return(False);
- }
- stermios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
- stermios.c_lflag |= ICANON;
- stermios.c_oflag &= ~(ONLCR);
- if (tcsetattr(0, TCSANOW, &stermios) < 0) {
- DEBUG(3,("could not set attributes of pty\n"));
- return(False);
- }
-
- /* make us completely into the right uid */
-#ifdef USE_SETRES
- setresgid(0,0,0);
- setresuid(0,0,0);
- setresgid(gid,gid,gid);
- setresuid(uid,uid,uid);
-#else
- setuid(0);
- seteuid(0);
- setgid(gid);
- setegid(gid);
- setuid(uid);
- seteuid(uid);
+ int slave;
+ struct termios stermios;
+ struct passwd *pass = Get_Pwnam(name, True);
+ gid_t gid;
+ uid_t uid;
+
+ if (pass == NULL)
+ {
+ DEBUG(0,
+ ("dochild: user name %s doesn't exist in the UNIX password database.\n",
+ name));
+ return False;
+ }
+
+ gid = pass->pw_gid;
+ uid = pass->pw_uid;
+
+ gain_root_privilege();
+
+ /* Start new session - gets rid of controlling terminal. */
+ if (setsid() < 0)
+ {
+ DEBUG(3,
+ ("Weirdness, couldn't let go of controlling terminal\n"));
+ return (False);
+ }
+
+ /* Open slave pty and acquire as new controlling terminal. */
+ if ((slave = sys_open(slavedev, O_RDWR, 0)) < 0)
+ {
+ DEBUG(3, ("More weirdness, could not open %s\n", slavedev));
+ return (False);
+ }
+#ifdef I_PUSH
+ ioctl(slave, I_PUSH, "ptem");
+ ioctl(slave, I_PUSH, "ldterm");
+#elif defined(TIOCSCTTY)
+ if (ioctl(slave, TIOCSCTTY, 0) < 0)
+ {
+ DEBUG(3, ("Error in ioctl call for slave pty\n"));
+ /* return(False); */
+ }
#endif
- /* execl() password-change application */
- if (execl("/bin/sh","sh","-c",passwordprogram,NULL) < 0) {
- DEBUG(3,("Bad status returned from %s\n",passwordprogram));
- return(False);
- }
- return(True);
+ /* Close master. */
+ close(master);
+
+ /* Make slave stdin/out/err of child. */
+
+ if (dup2(slave, STDIN_FILENO) != STDIN_FILENO)
+ {
+ DEBUG(3, ("Could not re-direct stdin\n"));
+ return (False);
+ }
+ if (dup2(slave, STDOUT_FILENO) != STDOUT_FILENO)
+ {
+ DEBUG(3, ("Could not re-direct stdout\n"));
+ return (False);
+ }
+ if (dup2(slave, STDERR_FILENO) != STDERR_FILENO)
+ {
+ DEBUG(3, ("Could not re-direct stderr\n"));
+ return (False);
+ }
+ if (slave > 2)
+ close(slave);
+
+ /* Set proper terminal attributes - no echo, canonical input processing,
+ no map NL to CR/NL on output. */
+
+ if (tcgetattr(0, &stermios) < 0)
+ {
+ DEBUG(3,
+ ("could not read default terminal attributes on pty\n"));
+ return (False);
+ }
+ stermios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
+ stermios.c_lflag |= ICANON;
+ stermios.c_oflag &= ~(ONLCR);
+ if (tcsetattr(0, TCSANOW, &stermios) < 0)
+ {
+ DEBUG(3, ("could not set attributes of pty\n"));
+ return (False);
+ }
+
+ /* make us completely into the right uid */
+ if (!as_root)
+ {
+ become_user_permanently(uid, gid);
+ }
+
+ DEBUG(10,
+ ("Invoking '%s' as password change program.\n",
+ passwordprogram));
+
+ /* execl() password-change application */
+ if (execl("/bin/sh", "sh", "-c", passwordprogram, NULL) < 0)
+ {
+ DEBUG(3, ("Bad status returned from %s\n", passwordprogram));
+ return (False);
+ }
+ return (True);
}
-static int expect(int master,char *expected,char *buf)
+static int expect(int master, char *issue, char *expected)
{
- int n, m;
-
- n = 0;
- buf[0] = 0;
- while (1) {
- if (n >= BUFSIZE-1) {
- return False;
- }
-
- /* allow 4 seconds for some output to appear */
- m = read_with_timeout(master, buf+n, 1, BUFSIZE-1-n, 4000);
- if (m < 0)
- return False;
-
- n += m;
- buf[n] = 0;
-
- {
- pstring s1,s2;
- strcpy(s1,buf);
- strcpy(s2,expected);
- if (do_match(s1, s2, False))
- return(True);
- }
- }
+ pstring buffer;
+ int attempts, timeout, nread, len;
+ BOOL match = False;
+
+ for (attempts = 0; attempts < 2; attempts++)
+ {
+ if (!strequal(issue, "."))
+ {
+ if (lp_passwd_chat_debug())
+ DEBUG(100, ("expect: sending [%s]\n", issue));
+
+ write(master, issue, strlen(issue));
+ }
+
+ if (strequal(expected, "."))
+ return True;
+
+ timeout = 2000;
+ nread = 0;
+ buffer[nread] = 0;
+
+ while ((len = read_with_timeout(master, buffer + nread, 1,
+ sizeof(buffer) - nread - 1,
+ timeout)) > 0)
+ {
+ nread += len;
+ buffer[nread] = 0;
+
+ if ((match = (ms_fnmatch(expected, buffer) == 0)))
+ timeout = 200;
+ }
+
+ if (lp_passwd_chat_debug())
+ DEBUG(100, ("expect: expected [%s] received [%s]\n",
+ expected, buffer));
+
+ if (match)
+ break;
+
+ if (len < 0)
+ {
+ DEBUG(2, ("expect: %s\n", strerror(errno)));
+ return False;
+ }
+ }
+
+ return match;
}
static void pwd_sub(char *buf)
{
- string_sub(buf,"\\n","\n");
- string_sub(buf,"\\r","\r");
- string_sub(buf,"\\s"," ");
- string_sub(buf,"\\t","\t");
+ all_string_sub(buf, "\\n", "\n", 0);
+ all_string_sub(buf, "\\r", "\r", 0);
+ all_string_sub(buf, "\\s", " ", 0);
+ all_string_sub(buf, "\\t", "\t", 0);
}
-static void writestring(int fd,char *s)
+static int talktochild(int master, char *seq)
{
- int l;
-
- l = strlen (s);
- write (fd, s, l);
-}
+ int count = 0;
+ fstring issue, expected;
+ fstrcpy(issue, ".");
-static int talktochild(int master, char *chatsequence)
-{
- char buf[BUFSIZE];
- int count=0;
- char *ptr=chatsequence;
- fstring chatbuf;
+ while (next_token(&seq, expected, NULL, sizeof(expected)))
+ {
+ pwd_sub(expected);
+ count++;
- *buf = 0;
- sleep(1);
+ if (!expect(master, issue, expected))
+ {
+ DEBUG(3, ("Response %d incorrect\n", count));
+ return False;
+ }
- while (next_token(&ptr,chatbuf,NULL)) {
- BOOL ok=True;
- count++;
- pwd_sub(chatbuf);
- if (!strequal(chatbuf,"."))
- ok = expect(master,chatbuf,buf);
+ if (!next_token(&seq, issue, NULL, sizeof(issue)))
+ fstrcpy(issue, ".");
-#if DEBUG_PASSWORD
- DEBUG(100,("chatbuf=[%s] responsebuf=[%s]\n",chatbuf,buf));
-#endif
+ pwd_sub(issue);
+ }
+
+ return (count > 0);
+}
- if (!ok) {
- DEBUG(3,("response %d incorrect\n",count));
- return(False);
- }
+static BOOL chat_with_program(char *passwordprogram, char *name,
+ char *chatsequence, BOOL as_root)
+{
+ char *slavedev;
+ int master;
+ pid_t pid, wpid;
+ int wstat;
+ BOOL chstat = False;
+
+ /* allocate a pseudo-terminal device */
+ if ((master = findpty(&slavedev)) < 0)
+ {
+ DEBUG(3,
+ ("Cannot Allocate pty for password change: %s\n",
+ name));
+ return (False);
+ }
+
+ /*
+ * We need to temporarily stop CatchChild from eating
+ * SIGCLD signals as it also eats the exit status code. JRA.
+ */
+
+ CatchChildLeaveStatus();
+
+ if ((pid = sys_fork()) < 0)
+ {
+ DEBUG(3,
+ ("Cannot fork() child for password change: %s\n",
+ name));
+ close(master);
+ CatchChild();
+ return (False);
+ }
+
+ /* we now have a pty */
+ if (pid > 0)
+ { /* This is the parent process */
+ if ((chstat = talktochild(master, chatsequence)) == False)
+ {
+ DEBUG(3,
+ ("Child failed to change password: %s\n",
+ name));
+ kill(pid, SIGKILL); /* be sure to end this process */
+ }
+
+ while ((wpid = sys_waitpid(pid, &wstat, 0)) < 0)
+ {
+ if (errno == EINTR)
+ {
+ errno = 0;
+ continue;
+ }
+ break;
+ }
+
+ if (wpid < 0)
+ {
+ DEBUG(3, ("The process is no longer waiting!\n\n"));
+ close(master);
+ CatchChild();
+ return (False);
+ }
+
+ /*
+ * Go back to ignoring children.
+ */
+ CatchChild();
+
+ close(master);
+
+ if (pid != wpid)
+ {
+ DEBUG(3,
+ ("We were waiting for the wrong process ID\n"));
+ return (False);
+ }
+ if (WIFEXITED(wstat) == 0)
+ {
+ DEBUG(3,
+ ("The process exited while we were waiting\n"));
+ return (False);
+ }
+ if (WEXITSTATUS(wstat) != 0)
+ {
+ DEBUG(3,
+ ("The status of the process exiting was %d\n",
+ wstat));
+ return (False);
+ }
+
+ }
+ else
+ {
+ /* CHILD */
+
+ /*
+ * Lose any oplock capabilities.
+ */
+ set_process_capability(KERNEL_OPLOCK_CAPABILITY, False);
+ set_inherited_process_capability(KERNEL_OPLOCK_CAPABILITY,
+ False);
+
+ /* make sure it doesn't freeze */
+ alarm(20);
+
+ if (as_root)
+ become_root(False);
+ DEBUG(3,
+ ("Dochild for user %s (uid=%d,gid=%d)\n", name,
+ (int)getuid(), (int)getgid()));
+ chstat =
+ dochild(master, slavedev, name, passwordprogram,
+ as_root);
+
+ /*
+ * The child should never return from dochild() ....
+ */
+
+ DEBUG(0,
+ ("chat_with_program: Error: dochild() returned %d\n",
+ chstat));
+ exit(1);
+ }
+
+ if (chstat)
+ DEBUG(3,
+ ("Password change %ssuccessful for user %s\n",
+ (chstat ? "" : "un"), name));
+ return (chstat);
+}
+
+
+BOOL chgpasswd(char *name, char *oldpass, char *newpass, BOOL as_root)
+{
+ pstring passwordprogram;
+ pstring chatsequence;
+ size_t i;
+ size_t len;
- if (!next_token(&ptr,chatbuf,NULL)) break;
- pwd_sub(chatbuf);
- if (!strequal(chatbuf,"."))
- writestring(master,chatbuf);
+ strlower(name);
+ DEBUG(3, ("Password change for user: %s\n", name));
#if DEBUG_PASSWORD
- DEBUG(100,("sendbuf=[%s]\n",chatbuf));
-#endif
- }
+ DEBUG(100, ("Passwords: old=%s new=%s\n", oldpass, newpass));
+#endif
- if (count<1) return(False);
+ /* Take the passed information and test it for minimum criteria */
+ /* Minimum password length */
+ if (strlen(newpass) < lp_min_passwd_length()) /* too short, must be at least MINPASSWDLENGTH */
+ {
+ DEBUG(0,
+ ("Password Change: user %s, New password is shorter than minimum password length = %d\n",
+ name, lp_min_passwd_length()));
+ return (False); /* inform the user */
+ }
+
+ /* Password is same as old password */
+ if (strcmp(oldpass, newpass) == 0) /* don't allow same password */
+ {
+ DEBUG(2,
+ ("Password Change: %s, New password is same as old\n", name)); /* log the attempt */
+ return (False); /* inform the user */
+ }
+
+ pstrcpy(passwordprogram, lp_passwd_program());
+ pstrcpy(chatsequence, lp_passwd_chat());
+
+ if (!*chatsequence)
+ {
+ DEBUG(2, ("Null chat sequence - no password changing\n"));
+ return (False);
+ }
+
+ if (!*passwordprogram)
+ {
+ DEBUG(2, ("Null password program - no password changing\n"));
+ return (False);
+ }
+
+ /*
+ * Check the old and new passwords don't contain any control
+ * characters.
+ */
+
+ len = strlen(oldpass);
+ for (i = 0; i < len; i++)
+ {
+ if (iscntrl((int)oldpass[i]))
+ {
+ DEBUG(0,
+ ("chat_with_program: oldpass contains control characters (disallowed).\n"));
+ return False;
+ }
+ }
+
+ len = strlen(newpass);
+ for (i = 0; i < len; i++)
+ {
+ if (iscntrl((int)newpass[i]))
+ {
+ DEBUG(0,
+ ("chat_with_program: newpass contains control characters (disallowed).\n"));
+ 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, name, chatsequence, as_root));
+}
- return (True);
+#else /* ALLOW_CHANGE_PASSWORD */
+BOOL chgpasswd(char *name, char *oldpass, char *newpass, BOOL as_root)
+{
+ DEBUG(0, ("Password changing not compiled in (user=%s)\n", name));
+ return (False);
}
+#endif /* ALLOW_CHANGE_PASSWORD */
+/***********************************************************
+ Code to check the lanman hashed password.
+************************************************************/
-BOOL chat_with_program(char *passwordprogram,char *name,char *chatsequence)
+BOOL check_lanman_password(char *user, uchar * pass1,
+ uchar * pass2, struct smb_passwd **psmbpw)
{
- char *slavedev;
- int master;
- pid_t pid, wpid;
- int wstat;
- BOOL chstat;
-
- /* allocate a pseudo-terminal device */
- if ((master = findpty (&slavedev)) < 0) {
- DEBUG(3,("Cannot Allocate pty for password change: %s",name));
- return(False);
- }
-
- if ((pid = fork()) < 0) {
- DEBUG(3,("Cannot fork() child for password change: %s",name));
- return(False);
- }
-
- /* we now have a pty */
- if (pid > 0){ /* This is the parent process */
- if ((chstat = talktochild(master, chatsequence)) == False) {
- DEBUG(3,("Child failed to change password: %s\n",name));
- kill(pid, SIGKILL); /* be sure to end this process */
- return(False);
- }
- if ((wpid = sys_waitpid(pid, &wstat, 0)) < 0) {
- DEBUG(3,("The process is no longer waiting!\n\n"));
- return(False);
- }
- if (pid != wpid) {
- DEBUG(3,("We were waiting for the wrong process ID\n"));
- return(False);
- }
- if (WIFEXITED(wstat) == 0) {
- DEBUG(3,("The process exited while we were waiting\n"));
- return(False);
- }
- if (WEXITSTATUS(wstat) != 0) {
- DEBUG(3,("The status of the process exiting was %d\n", wstat));
- return(False);
- }
-
- } else {
- /* CHILD */
-
- /* make sure it doesn't freeze */
- alarm(20);
-
- DEBUG(3,("Dochild for user %s (uid=%d,gid=%d)\n",name,getuid(),getgid()));
- chstat = dochild(master, slavedev, name, passwordprogram);
- }
- DEBUG(3,("Password change %ssuccessful for user %s\n", (chstat?"":"un"), name));
- return (chstat);
+ static uchar null_pw[16];
+ uchar unenc_new_pw[16];
+ uchar unenc_old_pw[16];
+ struct smb_passwd *smbpw;
+
+ *psmbpw = NULL;
+
+ become_root(0);
+ smbpw = getsmbpwnam(user);
+ unbecome_root(0);
+
+ if (smbpw == NULL)
+ {
+ DEBUG(0,
+ ("check_lanman_password: getsmbpwnam returned NULL\n"));
+ return False;
+ }
+
+ if (smbpw->acct_ctrl & ACB_DISABLED)
+ {
+ DEBUG(0,
+ ("check_lanman_password: account %s disabled.\n",
+ user));
+ return False;
+ }
+
+ if ((smbpw->smb_passwd == NULL) && (smbpw->acct_ctrl & ACB_PWNOTREQ))
+ {
+ uchar no_pw[14];
+ memset(no_pw, '\0', 14);
+ E_P16(no_pw, null_pw);
+ smbpw->smb_passwd = null_pw;
+ }
+ else if (smbpw->smb_passwd == NULL)
+ {
+ DEBUG(0, ("check_lanman_password: no lanman password !\n"));
+ return False;
+ }
+
+ /* Get the new lanman hash. */
+ D_P16(smbpw->smb_passwd, 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(smbpw->smb_passwd, unenc_old_pw, 16))
+ {
+ DEBUG(0,
+ ("check_lanman_password: old password doesn't match.\n"));
+ return False;
+ }
+
+ *psmbpw = smbpw;
+ return True;
}
+/***********************************************************
+ Code to change the lanman hashed password.
+ It nulls out the NT hashed password as it will
+ no longer be valid.
+************************************************************/
-BOOL chgpasswd(char *name,char *oldpass,char *newpass)
+BOOL change_lanman_password(struct smb_passwd *smbpw, uchar * pass1,
+ uchar * pass2)
{
- pstring passwordprogram;
- pstring chatsequence;
+ static uchar null_pw[16];
+ uchar unenc_new_pw[16];
+ BOOL ret;
+
+ if (smbpw == NULL)
+ {
+ DEBUG(0,
+ ("change_lanman_password: no smb password entry.\n"));
+ return False;
+ }
+
+ if (smbpw->acct_ctrl & ACB_DISABLED)
+ {
+ DEBUG(0,
+ ("change_lanman_password: account %s disabled.\n",
+ smbpw->smb_name));
+ return False;
+ }
+
+ if ((smbpw->smb_passwd == NULL) && (smbpw->acct_ctrl & ACB_PWNOTREQ))
+ {
+ uchar no_pw[14];
+ memset(no_pw, '\0', 14);
+ E_P16(no_pw, null_pw);
+ smbpw->smb_passwd = null_pw;
+ }
+ else if (smbpw->smb_passwd == NULL)
+ {
+ DEBUG(0, ("change_lanman_password: no lanman password !\n"));
+ return False;
+ }
+
+ /* Get the new lanman hash. */
+ D_P16(smbpw->smb_passwd, pass2, unenc_new_pw);
+
+ smbpw->smb_passwd = unenc_new_pw;
+ smbpw->smb_nt_passwd = NULL; /* We lose the NT hash. Sorry. */
+
+ /* Now write it into the file. */
+ become_root(0);
+ ret = mod_smbpwd_entry(smbpw, False);
+ unbecome_root(0);
+
+ return ret;
+}
- strlower(name);
- DEBUG(3,("Password change for user: %s\n",name));
+/***********************************************************
+ Code to check and change the OEM hashed password.
+************************************************************/
+BOOL pass_oem_change(char *user,
+ uchar * lmdata, uchar * lmhash,
+ uchar * ntdata, uchar * nthash)
+{
+ fstring new_passwd;
+ struct smb_passwd *sampw;
+ BOOL ret = check_oem_password(user, lmdata, lmhash, ntdata, nthash,
+ &sampw,
+ new_passwd, sizeof(new_passwd));
+
+ /*
+ * At this point we have the new case-sensitive plaintext
+ * password in the fstring new_passwd. If we wanted to synchronise
+ * with UNIX passwords we would call a UNIX password changing
+ * function here. However it would have to be done as root
+ * as the plaintext of the old users password is not
+ * available. JRA.
+ */
+
+ if (ret && lp_unix_password_sync())
+ {
+ ret = chgpasswd(user, "", new_passwd, True);
+ }
+
+ if (ret)
+ {
+ ret = change_oem_password(sampw, new_passwd, False);
+ }
+
+ memset(new_passwd, 0, sizeof(new_passwd));
+
+ return ret;
+}
-#if DEBUG_PASSWORD
- DEBUG(100,("Passwords: old=%s new=%s\n",oldpass,newpass));
-#endif
+/***********************************************************
+ 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.
- /* Take the passed information and test it for minimum criteria */
- /* Minimum password length */
- if (strlen(newpass) < MINPASSWDLENGTH) /* too short, must be at least MINPASSWDLENGTH */
- {
- DEBUG(2,("Password Change: %s, New password is shorter than MINPASSWDLENGTH\n",name));
- return (False); /* inform the user */
- }
-
- /* Password is same as old password */
- if (strcmp(oldpass,newpass) == 0) /* don't allow same password */
- {
- DEBUG(2,("Password Change: %s, New password is same as old\n",name)); /* log the attempt */
- return (False); /* inform the user */
- }
-
-#if (defined(PASSWD_PROGRAM) && defined(PASSWD_CHAT))
- strcpy(passwordprogram,PASSWD_PROGRAM);
- strcpy(chatsequence,PASSWD_CHAT);
-#else
- strcpy(passwordprogram,lp_passwd_program());
- strcpy(chatsequence,lp_passwd_chat());
+************************************************************/
+BOOL check_oem_password(char *user,
+ uchar * lmdata, uchar * lmhash,
+ uchar * ntdata, uchar * nthash,
+ struct smb_passwd **psmbpw, char *new_passwd,
+ int new_passwd_size)
+{
+ static uchar null_pw[16];
+ static uchar null_ntpw[16];
+ struct smb_passwd *smbpw = NULL;
+ 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 nt_pass_set = (ntdata != NULL && nthash != NULL);
+
+ become_root(False);
+ *psmbpw = smbpw = getsmbpwnam(user);
+ unbecome_root(False);
+
+ if (smbpw == NULL)
+ {
+ DEBUG(0, ("check_oem_password: getsmbpwnam returned NULL\n"));
+ return False;
+ }
+
+ if (smbpw->acct_ctrl & ACB_DISABLED)
+ {
+ DEBUG(0,
+ ("check_lanman_password: account %s disabled.\n",
+ user));
+ return False;
+ }
+
+ /* 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);
+
+ /* check for null passwords */
+ if (smbpw->smb_passwd == NULL)
+ {
+ if (smbpw->acct_ctrl & ACB_PWNOTREQ)
+ {
+ smbpw->smb_passwd = null_pw;
+ }
+ else
+ {
+ DEBUG(0,
+ ("check_oem_password: no lanman password !\n"));
+ return False;
+ }
+ }
+
+ if (smbpw->smb_nt_passwd == NULL && nt_pass_set)
+ {
+ if (smbpw->acct_ctrl & ACB_PWNOTREQ)
+ {
+ smbpw->smb_nt_passwd = null_pw;
+ }
+ else
+ {
+ DEBUG(0,
+ ("check_oem_password: no ntlm password !\n"));
+ return False;
+ }
+ }
+
+ /*
+ * Call the hash function to get the new password.
+ */
+ SamOEMhash((uchar *) lmdata, (uchar *) smbpw->smb_passwd, True);
+
+ /*
+ * 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));
+ return False;
+ }
+
+ if (nt_pass_set)
+ {
+ /*
+ * nt passwords are in unicode
+ */
+ int uni_pw_len = new_pw_len;
+ char *pw;
+ new_pw_len /= 2;
+ pw =
+ dos_unistrn2((uint16 *)(&lmdata[512 - uni_pw_len]),
+ new_pw_len);
+ memcpy(new_passwd, pw, new_pw_len + 1);
+ }
+ 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(smbpw->smb_passwd, unenc_old_pw, 16))
+ {
+ DEBUG(0,
+ ("check_oem_password: old lm password doesn't match.\n"));
+ return False;
+ }
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,
+ ("check_oem_password: password %s ok\n", new_passwd));
+#endif
+ return True;
+ }
+
+ /*
+ * 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(smbpw->smb_passwd, unenc_old_pw, 16))
+ {
+ DEBUG(0,
+ ("check_oem_password: old lm password doesn't match.\n"));
+ return False;
+ }
+
+ if (memcmp(smbpw->smb_nt_passwd, unenc_old_ntpw, 16))
+ {
+ DEBUG(0,
+ ("check_oem_password: old nt password doesn't match.\n"));
+ return False;
+ }
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("check_oem_password: password %s ok\n", new_passwd));
#endif
+ return True;
+}
+
+/***********************************************************
+ Code to change the oem password. Changes both the lanman
+ and NT hashes.
+ override = False, normal
+ override = True, override XXXXXXXXXX'd password
+************************************************************/
+
+BOOL change_oem_password(struct smb_passwd *smbpw, char *new_passwd,
+ BOOL override)
+{
+ int ret;
+ uchar new_nt_p16[16];
+ uchar new_p16[16];
+
+ nt_lm_owf_gen(new_passwd, new_nt_p16, new_p16);
- if (!*chatsequence) {
- DEBUG(2,("Null chat sequence - no password changing\n"));
- return(False);
- }
+ smbpw->smb_passwd = new_p16;
+ smbpw->smb_nt_passwd = new_nt_p16;
- if (!*passwordprogram) {
- DEBUG(2,("Null password program - no password changing\n"));
- return(False);
- }
+ /* Now write it into the file. */
+ become_root(0);
+ ret = mod_smbpwd_entry(smbpw, override);
+ unbecome_root(0);
- string_sub(passwordprogram,"%u",name);
- string_sub(passwordprogram,"%o",oldpass);
- string_sub(passwordprogram,"%n",newpass);
+ memset(new_passwd, '\0', strlen(new_passwd));
- string_sub(chatsequence,"%u",name);
- string_sub(chatsequence,"%o",oldpass);
- string_sub(chatsequence,"%n",newpass);
- return(chat_with_program(passwordprogram,name,chatsequence));
+ return ret;
}
-#else
-BOOL chgpasswd(char *name,char *oldpass,char *newpass)
+/***********************************************************
+ Code to check a plaintext password against smbpasswd entries.
+***********************************************************/
+
+BOOL check_plaintext_password(char *user, char *old_passwd,
+ int old_passwd_size, struct smb_passwd **psmbpw)
{
- DEBUG(0,("Password changing not compiled in (user=%s)\n",name));
- return(False);
-}
+ struct smb_passwd *smbpw = NULL;
+ uchar old_pw[16], old_ntpw[16];
+
+ become_root(False);
+ *psmbpw = smbpw = getsmbpwnam(user);
+ unbecome_root(False);
+
+ if (smbpw == NULL)
+ {
+ DEBUG(0,
+ ("check_plaintext_password: getsmbpwnam returned NULL\n"));
+ return False;
+ }
+
+ if (smbpw->acct_ctrl & ACB_DISABLED)
+ {
+ DEBUG(0,
+ ("check_plaintext_password: account %s disabled.\n",
+ user));
+ return (False);
+ }
+
+ nt_lm_owf_gen(old_passwd, old_ntpw, old_pw);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("check_plaintext_password: smbpw->smb_nt_passwd \n"));
+ dump_data(100, smbpw->smb_nt_passwd, 16);
+ DEBUG(100, ("check_plaintext_password: old_ntpw \n"));
+ dump_data(100, old_ntpw, 16);
+ DEBUG(100, ("check_plaintext_password: smbpw->smb_passwd \n"));
+ dump_data(100, smbpw->smb_passwd, 16);
+ DEBUG(100, ("check_plaintext_password: old_pw\n"));
+ dump_data(100, old_pw, 16);
#endif
+
+ if (memcmp(smbpw->smb_nt_passwd, old_ntpw, 16)
+ && memcmp(smbpw->smb_passwd, old_pw, 16))
+ return (False);
+ else
+ return (True);
+}
+
+#undef OLD_NTDOMAIN
git.samba.org / kai / samba.git / blobdiff