/* * Unix SMB/Netbios implementation. * Copyright (C) Jeremy Allison 1995-1998 * Copyright (C) Tim Potter 2001 * * 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. */ #include "includes.h" extern pstring global_myname; /* * Next two lines needed for SunOS and don't * hurt anything else... */ extern char *optarg; extern int optind; /** forced running in root-mode **/ static BOOL local_mode; /** * Print command usage on stderr and die. **/ static void usage(void) { printf("When run by root:\n"); printf(" smbpasswd [options] [username] [password]\n"); printf("otherwise:\n"); printf(" smbpasswd [options] [password]\n\n"); printf("options:\n"); printf(" -s use stdin for password prompt\n"); printf(" -D LEVEL debug level\n"); printf(" -U USER remote username\n"); printf(" -r MACHINE remote machine\n"); printf("extra options when run by root or in local mode:\n"); printf(" -L local mode (must be first option)\n"); printf(" -R ORDER name resolve order\n"); printf(" -a add user\n"); printf(" -x delete user\n"); printf(" -d disable user\n"); printf(" -e enable user\n"); printf(" -n set no password\n"); printf(" -m machine trust account\n"); exit(1); } static void set_line_buffering(FILE *f) { setvbuf(f, NULL, _IOLBF, 0); } /************************************************************* Utility function to prompt for passwords from stdin. Each password entered must end with a newline. *************************************************************/ static char *stdin_new_passwd(void) { static fstring new_passwd; size_t len; ZERO_ARRAY(new_passwd); /* * if no error is reported from fgets() and string at least contains * the newline that ends the password, then replace the newline with * a null terminator. */ if ( fgets(new_passwd, sizeof(new_passwd), stdin) != NULL) { if ((len = strlen(new_passwd)) > 0) { if(new_passwd[len-1] == '\n') new_passwd[len - 1] = 0; } } return(new_passwd); } /************************************************************* Utility function to get passwords via tty or stdin Used if the '-s' option is set to silently get passwords to enable scripting. *************************************************************/ static char *get_pass( char *prompt, BOOL stdin_get) { char *p; if (stdin_get) { p = stdin_new_passwd(); } else { p = getpass(prompt); } return smb_xstrdup(p); } /************************************************************* Utility function to prompt for new password. *************************************************************/ static char *prompt_for_new_password(BOOL stdin_get) { char *p; fstring new_passwd; ZERO_ARRAY(new_passwd); p = get_pass("New SMB password:", stdin_get); fstrcpy(new_passwd, p); SAFE_FREE(p); p = get_pass("Retype new SMB password:", stdin_get); if (strcmp(p, new_passwd)) { fprintf(stderr, "Mismatch - password unchanged.\n"); ZERO_ARRAY(new_passwd); SAFE_FREE(p); return NULL; } return p; } /************************************************************* Change a password either locally or remotely. *************************************************************/ static BOOL password_change(const char *remote_machine, char *user_name, char *old_passwd, char *new_passwd, int local_flags) { BOOL ret; pstring err_str; pstring msg_str; if (remote_machine != NULL) { if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER| LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) { /* these things can't be done remotely yet */ return False; } ret = remote_password_change(remote_machine, user_name, old_passwd, new_passwd, err_str, sizeof(err_str)); if(*err_str) fprintf(stderr, err_str); return ret; } ret = local_password_change(user_name, local_flags, new_passwd, err_str, sizeof(err_str), msg_str, sizeof(msg_str)); if(*msg_str) printf(msg_str); if(*err_str) fprintf(stderr, err_str); return ret; } /************************************************************* Handle password changing for root. *************************************************************/ static int process_root(int argc, char *argv[]) { struct passwd *pwd; int result = 0, ch; BOOL got_pass = False, got_username = False; int local_flags = LOCAL_SET_PASSWORD; BOOL stdin_passwd_get = False; fstring user_name, user_password; char *new_passwd = NULL; char *old_passwd = NULL; char *remote_machine = NULL; ZERO_STRUCT(user_name); ZERO_STRUCT(user_password); user_name[0] = '\0'; while ((ch = getopt(argc, argv, "axdehmnjr:sR:D:U:L")) != EOF) { switch(ch) { case 'L': local_mode = True; break; case 'a': local_flags |= LOCAL_ADD_USER; break; case 'x': local_flags |= LOCAL_DELETE_USER; local_flags &= ~LOCAL_SET_PASSWORD; break; case 'd': local_flags |= LOCAL_DISABLE_USER; local_flags &= ~LOCAL_SET_PASSWORD; break; case 'e': local_flags |= LOCAL_ENABLE_USER; local_flags &= ~LOCAL_SET_PASSWORD; break; case 'm': local_flags |= LOCAL_TRUST_ACCOUNT; break; case 'j': d_printf("See 'net rpc join' for this functionality\n"); exit(1); break; case 'r': remote_machine = optarg; break; case 's': set_line_buffering(stdin); set_line_buffering(stdout); set_line_buffering(stderr); stdin_passwd_get = True; break; case 'R': lp_set_name_resolve_order(optarg); break; case 'D': DEBUGLEVEL = atoi(optarg); break; case 'U': { char *lp; got_username = True; fstrcpy(user_name, optarg); if ((lp = strchr_m(user_name, '%'))) { *lp = 0; fstrcpy(user_password, lp + 1); got_pass = True; memset(strchr_m(optarg, '%') + 1, 'X', strlen(user_password)); } break; } case 'h': default: usage(); } } argc -= optind; argv += optind; /* * Ensure both add/delete user are not set * Ensure add/delete user and either remote machine or join domain are * not both set. */ if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) || ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) && (remote_machine != NULL))) { usage(); } /* Only load interfaces if we are doing network operations. */ if (remote_machine) { load_interfaces(); } /* * Deal with root - can add a user, but only locally. */ switch(argc) { case 0: if (!got_username) fstrcpy(user_name, ""); break; case 1: if (got_username) usage(); fstrcpy(user_name, argv[0]); break; case 2: if (got_username || got_pass) usage(); fstrcpy(user_name, argv[0]); new_passwd = smb_xstrdup(argv[1]); break; default: usage(); } if (!user_name[0] && (pwd = sys_getpwuid(geteuid()))) { fstrcpy(user_name, pwd->pw_name); } if (!user_name[0]) { fprintf(stderr,"You must specify a username\n"); exit(1); } if (local_flags & LOCAL_TRUST_ACCOUNT) { /* add the $ automatically */ static fstring buf; /* * Remove any trailing '$' before we * generate the initial machine password. */ if (user_name[strlen(user_name)-1] == '$') { user_name[strlen(user_name)-1] = 0; } if (local_flags & LOCAL_ADD_USER) { SAFE_FREE(new_passwd); new_passwd = smb_xstrdup(user_name); strlower(new_passwd); } /* * Now ensure the username ends in '$' for * the machine add. */ slprintf(buf, sizeof(buf)-1, "%s$", user_name); fstrcpy(user_name, buf); } else { if (remote_machine != NULL) { old_passwd = get_pass("Old SMB password:",stdin_passwd_get); } if (!(local_flags & LOCAL_SET_PASSWORD)) { /* * If we are trying to enable a user, first we need to find out * if they are using a modern version of the smbpasswd file that * disables a user by just writing a flag into the file. If so * then we can re-enable a user without prompting for a new * password. If not (ie. they have a no stored password in the * smbpasswd file) then we need to prompt for a new password. */ if(local_flags & LOCAL_ENABLE_USER) { SAM_ACCOUNT *sampass = NULL; BOOL ret; pdb_init_sam(&sampass); ret = pdb_getsampwnam(sampass, user_name); if((sampass != False) && (pdb_get_lanman_passwd(sampass) == NULL)) { local_flags |= LOCAL_SET_PASSWORD; } pdb_free_sam(&sampass); } } if(local_flags & LOCAL_SET_PASSWORD) { new_passwd = prompt_for_new_password(stdin_passwd_get); if(!new_passwd) { fprintf(stderr, "Unable to get new password.\n"); exit(1); } } } if (!password_change(remote_machine, user_name, old_passwd, new_passwd, local_flags)) { fprintf(stderr,"Failed to modify password entry for user %s\n", user_name); result = 1; goto done; } if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) { SAM_ACCOUNT *sampass = NULL; BOOL ret; pdb_init_sam(&sampass); ret = pdb_getsampwnam(sampass, user_name); printf("Password changed for user %s.", user_name ); if( (ret != False) && (pdb_get_acct_ctrl(sampass)&ACB_DISABLED) ) printf(" User has disabled flag set."); if((ret != False) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) ) printf(" User has no password flag set."); printf("\n"); pdb_free_sam(&sampass); } done: SAFE_FREE(new_passwd); return result; } /** handle password changing for non-root **/ static int process_nonroot(int argc, char *argv[]) { struct passwd *pwd = NULL; int result = 0, ch; BOOL stdin_passwd_get = False; char *old_passwd = NULL; char *remote_machine = NULL; char *user_name = NULL; char *new_passwd = NULL; while ((ch = getopt(argc, argv, "hD:r:sU:")) != EOF) { switch(ch) { case 'D': DEBUGLEVEL = atoi(optarg); break; case 'r': remote_machine = optarg; break; case 's': set_line_buffering(stdin); set_line_buffering(stdout); set_line_buffering(stderr); stdin_passwd_get = True; break; case 'U': user_name = optarg; break; default: usage(); } } argc -= optind; argv += optind; if(argc > 1) { usage(); } if (argc == 1) { new_passwd = argv[0]; } if (!user_name) { pwd = sys_getpwuid(getuid()); if (pwd) { user_name = smb_xstrdup(pwd->pw_name); } else { fprintf(stderr, "smbpasswd: you don't exist - go away\n"); exit(1); } } /* * A non-root user is always setting a password * via a remote machine (even if that machine is * localhost). */ load_interfaces(); /* Delayed from main() */ if (remote_machine == NULL) { remote_machine = "127.0.0.1"; } if (remote_machine != NULL) { old_passwd = get_pass("Old SMB password:",stdin_passwd_get); } if (!new_passwd) { new_passwd = prompt_for_new_password(stdin_passwd_get); } if (!new_passwd) { fprintf(stderr, "Unable to get new password.\n"); exit(1); } if (!password_change(remote_machine, user_name, old_passwd, new_passwd, 0)) { fprintf(stderr,"Failed to change password for %s\n", user_name); result = 1; goto done; } printf("Password changed for user %s\n", user_name); done: SAFE_FREE(old_passwd); SAFE_FREE(new_passwd); return result; } /********************************************************* Start here. **********************************************************/ int main(int argc, char **argv) { #if defined(HAVE_SET_AUTH_PARAMETERS) set_auth_parameters(argc, argv); #endif /* HAVE_SET_AUTH_PARAMETERS */ setup_logging("smbpasswd", True); if(!initialize_password_db(True)) { fprintf(stderr, "Can't setup password database vectors.\n"); exit(1); } if (!lp_load(dyn_CONFIGFILE,True,False,False)) { fprintf(stderr, "Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE); exit(1); } /* * Set the machine NETBIOS name if not already * set from the config file. */ if (!*global_myname) { char *p; fstrcpy(global_myname, myhostname()); p = strchr_m(global_myname, '.' ); if (p) *p = 0; } strupper(global_myname); /* Check the effective uid - make sure we are not setuid */ if (is_setuid_root()) { fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n"); exit(1); } /* pre-check for local mode option as first option. We can't do this via normal getopt as getopt can't be called twice. */ if (argc > 1 && strcmp(argv[1], "-L") == 0) { local_mode = True; } if (local_mode || getuid() == 0) { secrets_init(); return process_root(argc, argv); } return process_nonroot(argc, argv); }