summaryrefslogtreecommitdiffstats
path: root/source/smbd/chgpasswd.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/smbd/chgpasswd.c')
-rw-r--r--source/smbd/chgpasswd.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/source/smbd/chgpasswd.c b/source/smbd/chgpasswd.c
deleted file mode 100644
index 883ad5214a8..00000000000
--- a/source/smbd/chgpasswd.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/* 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.
-*/
-
-/*
- * This code was copied/borrowed and stolen from various sources.
- * The primary source was the poppasswd.c from the authors of POPMail. This software
- * was included as a client to change passwords using the 'passwd' program
- * on the remote machine.
- *
- * This routine is called by set_user_password() in password.c only if ALLOW_PASSWORD_CHANGE
- * is defined in the compiler directives located in the Makefile.
- *
- * This code has been hacked by Bob Nance (nance@niehs.nih.gov) and Evan Patterson
- * (patters2@niehs.nih.gov) at the National Institute of Environmental Health Sciences
- * and rights to modify, distribute or incorporate this change to the CAP suite or
- * using it for any other reason are granted, so long as this disclaimer is left intact.
- */
-
-/*
- This code was hacked considerably for inclusion in Samba, primarily
- by Andrew.Tridgell@anu.edu.au. The biggest change was the addition
- of the "password chat" option, which allows the easy runtime
- specification of the expected sequence of events to change a
- password.
- */
-
-#include "includes.h"
-
-extern int DEBUGLEVEL;
-
-#ifdef ALLOW_CHANGE_PASSWORD
-
-#define MINPASSWDLENGTH 5
-#define BUFSIZE 512
-
-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("/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 = 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);
-}
-
-static int dochild(int master,char *slavedev, char *name, char *passwordprogram)
-{
- 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);
-#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);
-}
-
-static int expect(int master,char *expected,char *buf)
-{
- 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);
- }
- }
-}
-
-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");
-}
-
-static void writestring(int fd,char *s)
-{
- int l;
-
- l = strlen (s);
- write (fd, s, l);
-}
-
-
-static int talktochild(int master, char *chatsequence)
-{
- char buf[BUFSIZE];
- int count=0;
- char *ptr=chatsequence;
- fstring chatbuf;
-
- *buf = 0;
- sleep(1);
-
- while (next_token(&ptr,chatbuf,NULL)) {
- BOOL ok=True;
- count++;
- pwd_sub(chatbuf);
- if (!strequal(chatbuf,"."))
- ok = expect(master,chatbuf,buf);
-
-#if DEBUG_PASSWORD
- DEBUG(100,("chatbuf=[%s] responsebuf=[%s]\n",chatbuf,buf));
-#endif
-
- if (!ok) {
- DEBUG(3,("response %d incorrect\n",count));
- return(False);
- }
-
- if (!next_token(&ptr,chatbuf,NULL)) break;
- pwd_sub(chatbuf);
- if (!strequal(chatbuf,"."))
- writestring(master,chatbuf);
-
-#if DEBUG_PASSWORD
- DEBUG(100,("sendbuf=[%s]\n",chatbuf));
-#endif
- }
-
- if (count<1) return(False);
-
- return (True);
-}
-
-
-BOOL chat_with_program(char *passwordprogram,char *name,char *chatsequence)
-{
- 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);
-}
-
-
-BOOL chgpasswd(char *name,char *oldpass,char *newpass)
-{
- pstring passwordprogram;
- pstring chatsequence;
-
- strlower(name);
- DEBUG(3,("Password change for user: %s\n",name));
-
-#if DEBUG_PASSWORD
- DEBUG(100,("Passwords: old=%s new=%s\n",oldpass,newpass));
-#endif
-
- /* 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());
-#endif
-
- 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);
- }
-
- string_sub(passwordprogram,"%u",name);
- string_sub(passwordprogram,"%o",oldpass);
- string_sub(passwordprogram,"%n",newpass);
-
- string_sub(chatsequence,"%u",name);
- string_sub(chatsequence,"%o",oldpass);
- string_sub(chatsequence,"%n",newpass);
- return(chat_with_program(passwordprogram,name,chatsequence));
-}
-
-#else
-BOOL chgpasswd(char *name,char *oldpass,char *newpass)
-{
- DEBUG(0,("Password changing not compiled in (user=%s)\n",name));
- return(False);
-}
-#endif
generated by cgit (git 2.34.1) at 2024-05-10 12:14:31 +0000