/* * Unix SMB/Netbios implementation. Version 1.9. smbpasswd module. Copyright * (C) Jeremy Allison 1995-1998 * * 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. */ #include "includes.h" extern pstring scope; extern pstring myhostname; extern pstring global_myname; extern fstring global_myworkgroup; static char *prog_name; /********************************************************* Print command usage on stderr and die. **********************************************************/ static void usage(char *name, BOOL is_root) { if(is_root) fprintf(stderr, "Usage is : %s [-D DEBUGLEVEL] [-h] [-a] [-d] [-e] [-m] [-n] [-s] [username] [password]\n\ %s: [-R ] [-D DEBUGLEVEL] [-j DOMAINNAME] [-r machine] [-U remote_username] [username] [password]\n%s: [-h]\n", name, name, name); else fprintf(stderr, "Usage is : %s [-h] [-s] [-D DEBUGLEVEL] [-r machine] [-U remote_username] [password]\n", name); exit(1); } /********************************************************* Join a domain. **********************************************************/ static int join_domain( char *domain, char *remote) { pstring remote_machine; fstring trust_passwd; unsigned char orig_trust_passwd_hash[16]; BOOL ret; pstrcpy(remote_machine, remote ? remote : ""); fstrcpy(trust_passwd, global_myname); strlower(trust_passwd); E_md4hash( (uchar *)trust_passwd, orig_trust_passwd_hash); /* Ensure that we are not trying to join a domain if we are locally set up as a domain controller. */ if(strequal(remote, global_myname)) { fprintf(stderr, "%s: Cannot join domain %s as the domain controller name is our own. \ We cannot be a domain controller for a domain and also be a domain member.\n", prog_name, domain); return 1; } /* * Create the machine account password file. */ if(!trust_password_lock( domain, global_myname, True)) { fprintf(stderr, "%s: unable to open the machine account password file for \ machine %s in domain %s.\n", prog_name, global_myname, domain); return 1; } /* * Write the old machine account password. */ if(!set_trust_account_password( orig_trust_passwd_hash)) { fprintf(stderr, "%s: unable to write the machine account password for \ machine %s in domain %s.\n", prog_name, global_myname, domain); trust_password_unlock(); return 1; } /* * If we are given a remote machine assume this is the PDC. */ if(remote == NULL) pstrcpy(remote_machine, lp_passwordserver()); if(!*remote_machine) { fprintf(stderr, "%s: No password server list given in smb.conf - \ unable to join domain.\n", prog_name); trust_password_unlock(); return 1; } ret = change_trust_account_password( domain, remote_machine); trust_password_unlock(); if(!ret) { trust_password_delete( domain, global_myname); fprintf(stderr,"%s: Unable to join domain %s.\n", prog_name, domain); } else { printf("%s: Joined domain %s.\n", prog_name, domain); } return (int)ret; } /************************************************************* 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; memset( new_passwd, '\0', sizeof(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) { if (stdin_get) return( stdin_new_passwd()); else return( getpass( prompt)); } /************************************************************* Utility function to prompt for new password. *************************************************************/ static void prompt_for_new_password(char *new_passwd, BOOL stdin_get) { char *p; new_passwd[0] = '\0'; p = get_pass("New SMB password:", stdin_get); strncpy(new_passwd, p, sizeof(fstring)); new_passwd[sizeof(fstring)-1] = '\0'; p = get_pass("Retype new SMB password:", stdin_get); if (strncmp(p, new_passwd, sizeof(fstring)-1)) { fprintf(stderr, "%s: Mismatch - password unchanged.\n", prog_name); exit(1); } if (new_passwd[0] == '\0') { printf("Password not set\n"); exit(0); } } /********************************************************* Start here. **********************************************************/ int main(int argc, char **argv) { extern char *optarg; extern int optind; extern int DEBUGLEVEL; uid_t real_uid; uid_t eff_uid; struct passwd *pwd = NULL; fstring old_passwd; fstring new_passwd; uchar new_p16[16]; uchar new_nt_p16[16]; char *p; struct smb_passwd *smb_pwent; FILE *fp; int ch; int err; BOOL is_root = False; pstring user_name; BOOL remote_user_name = False; char *remote_machine = NULL; BOOL add_user = False; BOOL got_new_pass = False; BOOL trust_account = False; BOOL disable_user = False; BOOL enable_user = False; BOOL set_no_password = False; BOOL joining_domain = False; BOOL stdin_passwd_get = False; char *new_domain = NULL; pstring servicesf = CONFIGFILE; void *vp; struct nmb_name calling, called; new_passwd[0] = '\0'; user_name[0] = '\0'; memset(old_passwd, '\0', sizeof(old_passwd)); memset(new_passwd, '\0', sizeof(new_passwd)); prog_name = argv[0]; TimeInit(); setup_logging(prog_name,True); charset_initialise(); if(!initialize_password_db()) { fprintf(stderr, "%s: Can't setup password database vectors.\n", prog_name); exit(1); } if (!lp_load(servicesf,True,False,False)) { fprintf(stderr, "%s: Can't load %s - run testparm to debug it\n", prog_name, servicesf); exit(1); } if(!get_myname(myhostname,NULL)) { fprintf(stderr, "%s: unable to get my hostname.\n", prog_name ); exit(1); } /* * Set the machine NETBIOS name if not already * set from the config file. */ if (!*global_myname) { fstrcpy( global_myname, myhostname ); p = strchr( global_myname, '.' ); if (p) *p = 0; } strupper( global_myname ); codepage_initialise(lp_client_code_page()); /* Get the real and effective uids */ real_uid = getuid(); eff_uid = geteuid(); /* Check the effective uid */ if ((eff_uid == (uid_t)0) && (real_uid != (uid_t)0)) { fprintf(stderr, "%s: Must *NOT* be setuid root.\n", prog_name); exit(1); } is_root = (eff_uid == (uid_t)0); while ((ch = getopt(argc, argv, "adehmnj:r:sR:D:U:")) != EOF) { switch(ch) { case 'a': if(is_root) add_user = True; else usage(prog_name, is_root); break; case 'd': if(is_root) { disable_user = True; got_new_pass = True; fstrcpy(new_passwd, "XXXXXX"); } else usage(prog_name, is_root); break; case 'e': if(is_root) { enable_user = True; got_new_pass = True; fstrcpy(new_passwd, "XXXXXX"); } else usage(prog_name, is_root); break; case 'D': DEBUGLEVEL = atoi(optarg); break; case 'n': if(is_root) { set_no_password = True; got_new_pass = True; fstrcpy(new_passwd, "NO PASSWORD"); } else usage(prog_name, is_root); case 'r': remote_machine = optarg; break; case 's': /* * Ensure stdin/stdout are line buffered. */ if (setvbuf( stdin, NULL, _IOLBF, 0) != 0) { fprintf(stderr, "%s: setvbuf error on stdin. Error was %s\n", prog_name, strerror(errno)); exit(1); } if (setvbuf( stdout, NULL, _IOLBF, 0) != 0) { fprintf(stderr, "%s: setvbuf error on stdout. Error was %s\n", prog_name, strerror(errno)); exit(1); } if (setvbuf( stderr, NULL, _IOLBF, 0) != 0) { fprintf(stderr, "%s: setvbuf error on stderr. Error was %s\n", prog_name, strerror(errno)); perror("setvbuf error on stdout"); exit(1); } stdin_passwd_get = True; break; case 'R': if(is_root) { lp_set_name_resolve_order(optarg); break; } else usage(prog_name, is_root); case 'm': if(is_root) { trust_account = True; } else usage(prog_name, is_root); break; case 'j': if(is_root) { new_domain = optarg; strupper(new_domain); joining_domain = True; } else usage(prog_name, is_root); break; case 'U': remote_user_name = True; pstrcpy(user_name, optarg); break; case 'h': default: usage(prog_name, is_root); } } argc -= optind; argv += optind; if (!is_root && remote_user_name && !remote_machine) { fprintf(stderr, "%s: You can only use -U with -r.\n", prog_name); usage(prog_name, False); } /* * Ensure add_user and either remote machine or join domain are * not both set. */ if(add_user && ((remote_machine != NULL) || joining_domain)) usage(prog_name, True); /* * Deal with joining a domain. */ if(joining_domain && argc != 0) usage(prog_name, True); if(joining_domain) { return join_domain( new_domain, remote_machine); } if(is_root) { /* * Deal with root - can add a user, but only locally. */ switch(argc) { case 0: break; case 1: /* If we are root we can change another's password. */ pstrcpy(user_name, argv[0]); break; case 2: pstrcpy(user_name, argv[0]); fstrcpy(new_passwd, argv[1]); got_new_pass = True; break; default: usage(prog_name, True); } if(*user_name) { if(trust_account) { int username_len = strlen(user_name); if(username_len >= sizeof(pstring) - 1) { fprintf(stderr, "%s: machine account name too long.\n", user_name); exit(1); } if(user_name[username_len-1] != '$') { user_name[username_len] = '$'; user_name[username_len+1] = '\0'; } } if(!remote_machine && ((pwd = Get_Pwnam(user_name, True)) == NULL)) { fprintf(stderr, "%s: User \"%s\" was not found in system password file.\n", prog_name, user_name); exit(1); } } else { if((pwd = getpwuid(eff_uid)) != NULL) pstrcpy( user_name, pwd->pw_name); } } else { if(add_user) { fprintf(stderr, "%s: Only root can add a user.\n", prog_name); usage(prog_name, False); } if(disable_user) { fprintf(stderr, "%s: Only root can disable a user.\n", prog_name); usage(prog_name, False); } if(enable_user) { fprintf(stderr, "%s: Only root can enable a user.\n", prog_name); usage(prog_name, False); } if(argc > 1) usage(prog_name, False); if(argc == 1) { fstrcpy(new_passwd, argv[0]); got_new_pass = True; } if(!remote_user_name && ((pwd = getpwuid(eff_uid)) != NULL)) pstrcpy( user_name, pwd->pw_name); /* * A non-root user is always setting a password * via a remote machine (even if that machine is * localhost). */ if(remote_machine == NULL) remote_machine = "127.0.0.1"; } if (*user_name == '\0') { fprintf(stderr, "%s: Unable to get a user name for password change.\n", prog_name); exit(1); } /* * If we are adding a machine account then pretend * we already have the new password, we will be using * the machinename as the password. */ if(add_user && trust_account) { got_new_pass = True; strncpy(new_passwd, user_name, sizeof(fstring)); new_passwd[sizeof(fstring)-1] = '\0'; strlower(new_passwd); if(new_passwd[strlen(new_passwd)-1] == '$') new_passwd[strlen(new_passwd)-1] = '\0'; } /* * If we are root we don't ask for the old password (unless it's on a * remote machine. */ if (remote_machine != NULL) { p = get_pass("Old SMB password:",stdin_passwd_get); fstrcpy(old_passwd, p); } if (!got_new_pass) prompt_for_new_password(new_passwd,stdin_passwd_get); if (new_passwd[0] == '\0') { printf("Password not set\n"); exit(0); } /* * Now do things differently depending on if we're changing the * password on a remote machine. Remember - a normal user is * always using this code, looping back to the local smbd. */ if(remote_machine != NULL) { struct cli_state cli; struct in_addr ip; if(!resolve_name( remote_machine, &ip, 0x20)) { fprintf(stderr, "%s: unable to find an IP address for machine %s.\n", prog_name, remote_machine ); exit(1); } ZERO_STRUCT(cli); if (!cli_initialise(&cli) || !cli_connect(&cli, remote_machine, &ip)) { fprintf(stderr, "%s: unable to connect to SMB server on machine %s. Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); exit(1); } make_nmb_name(&calling, global_myname , 0x0 , scope); make_nmb_name(&called , remote_machine, 0x20, scope); if (!cli_session_request(&cli, &calling, &called)) { fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); cli_shutdown(&cli); exit(1); } cli.protocol = PROTOCOL_NT1; if (!cli_negprot(&cli)) { fprintf(stderr, "%s: machine %s rejected the negotiate protocol. Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); cli_shutdown(&cli); exit(1); } /* * We should connect as the anonymous user here, in case * the server has "must change password" checked... * Thanks to for this fix. */ if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) { fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); cli_shutdown(&cli); exit(1); } if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) { fprintf(stderr, "%s: machine %s rejected the tconX on the IPC$ share. Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); cli_shutdown(&cli); exit(1); } if(!cli_oem_change_password(&cli, user_name, new_passwd, old_passwd)) { fprintf(stderr, "%s: machine %s rejected the password change: Error was : %s.\n", prog_name, remote_machine, cli_errstr(&cli) ); cli_shutdown(&cli); exit(1); } cli_shutdown(&cli); exit(0); } /* * Check for a machine account. */ if(trust_account && !pwd) { fprintf(stderr, "%s: User %s does not exist in system password file \ (usually /etc/passwd). Cannot add machine account without a valid system user.\n", prog_name, user_name); exit(1); } /* Calculate the MD4 hash (NT compatible) of the new password. */ nt_lm_owf_gen( new_passwd, new_nt_p16, new_p16); /* * Open the smbpaswd file. */ vp = startsmbpwent(True); if (!vp && errno == ENOENT) { fprintf(stderr,"%s: smbpasswd file did not exist - attempting to create it.\n", prog_name); fp = fopen(lp_smb_passwd_file(), "w"); if (fp) { fprintf(fp, "# Samba SMB password file\n"); fclose(fp); vp = startsmbpwent(True); } } if (!vp) { err = errno; fprintf(stderr, "%s: Failed to open password file %s.\n", prog_name, lp_smb_passwd_file()); errno = err; perror(prog_name); exit(err); } /* Get the smb passwd entry for this user */ smb_pwent = getsmbpwnam(user_name); if (smb_pwent == NULL) { if(add_user == False) { fprintf(stderr, "%s: Failed to find entry for user %s.\n", prog_name, pwd->pw_name); endsmbpwent(vp); exit(1); } /* Create a new smb passwd entry and set it to the given password. */ { struct smb_passwd new_smb_pwent; new_smb_pwent.smb_userid = pwd->pw_uid; new_smb_pwent.smb_name = pwd->pw_name; new_smb_pwent.smb_passwd = NULL; new_smb_pwent.smb_nt_passwd = NULL; new_smb_pwent.acct_ctrl = (trust_account ? ACB_WSTRUST : ACB_NORMAL); if(disable_user) { new_smb_pwent.acct_ctrl |= ACB_DISABLED; } else if (set_no_password) { new_smb_pwent.acct_ctrl |= ACB_PWNOTREQ; } else { new_smb_pwent.smb_passwd = new_p16; new_smb_pwent.smb_nt_passwd = new_nt_p16; } if(add_smbpwd_entry(&new_smb_pwent) == False) { fprintf(stderr, "%s: Failed to add entry for user %s.\n", prog_name, pwd->pw_name); endsmbpwent(vp); exit(1); } endsmbpwent(vp); printf("%s: Added user %s.\n", prog_name, user_name); exit(0); } } else { /* the entry already existed */ add_user = False; } /* * We are root - just write the new password * and the valid last change time. */ if(disable_user) smb_pwent->acct_ctrl |= ACB_DISABLED; else if (enable_user) { if(smb_pwent->smb_passwd == NULL) { prompt_for_new_password(new_passwd,stdin_passwd_get); nt_lm_owf_gen( new_passwd, new_nt_p16, new_p16); smb_pwent->smb_passwd = new_p16; smb_pwent->smb_nt_passwd = new_nt_p16; } smb_pwent->acct_ctrl &= ~ACB_DISABLED; } else if (set_no_password) { smb_pwent->acct_ctrl |= ACB_PWNOTREQ; /* This is needed to preserve ACB_PWNOTREQ in mod_smbfilepwd_entry */ smb_pwent->smb_passwd = NULL; smb_pwent->smb_nt_passwd = NULL; } else { smb_pwent->acct_ctrl &= ~ACB_PWNOTREQ; smb_pwent->smb_passwd = new_p16; smb_pwent->smb_nt_passwd = new_nt_p16; } if(mod_smbpwd_entry(smb_pwent,True) == False) { fprintf(stderr, "%s: Failed to modify entry for user %s.\n", prog_name, pwd->pw_name); endsmbpwent(vp); exit(1); } endsmbpwent(vp); if(disable_user) printf("User %s disabled.\n", user_name); else if(enable_user) printf("User %s enabled.\n", user_name); else if (set_no_password) printf("User %s - set to no password.\n", user_name); else printf("Password changed for user %s.\n", user_name); return 0; }