/* * 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" /* * Password changing error codes. */ struct { int err; char *message; } pw_change_errmap[] = { {5, "User has insufficient privilege" }, {86, "The specified password is invalid" }, {2226, "Operation only permitted on a Primary Domain Controller" }, {2242, "The password of this user has expired." }, {2243, "The password of this user cannot change." }, {2244, "This password cannot be used now (password history conflict)." }, {2245, "The password is shorter than required." }, {2246, "The password of this user is too recent to change."}, {0, NULL} }; /****************************************************** Return an error message for a remote password change. *******************************************************/ char *get_error_message(struct cli_state *cli) { static fstring error_message; int errclass; int errnum; int i; /* * Errors are of two kinds - smb errors, * dealt with by cli_errstr, and rap * errors, whose error code is in cli.error. */ cli_error(cli, &errclass, &errnum); if(errclass != 0) return cli_errstr(cli); sprintf(error_message, "code %d", cli->error); for(i = 0; pw_change_errmap[i].message != NULL; i++) { if (pw_change_errmap[i].err == cli->error) { fstrcpy( error_message, pw_change_errmap[i].message); break; } } return error_message; } /********************************************************* 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] [-a] [-d] [-m] [-n] [username] [password]\n\ %s: [-R ] [-D DEBUGLEVEL] [-r machine] [username] [password]\n%s: [-h]\n", name, name, name); else fprintf(stderr, "Usage is : %s [-h] [-D DEBUGLEVEL] [-r machine] [password]\n", name); exit(1); } /********************************************************* Start here. **********************************************************/ int main(int argc, char **argv) { extern char *optarg; extern int optind; extern int DEBUGLEVEL; char *prog_name; int real_uid; struct passwd *pwd; 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; char *remote_machine = NULL; BOOL add_user = False; BOOL got_new_pass = False; BOOL machine_account = False; BOOL disable_user = False; BOOL set_no_password = False; pstring servicesf = CONFIGFILE; void *vp; 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 (!lp_load(servicesf,True,False,False)) { fprintf(stderr, "%s: Can't load %s - run testparm to debug it\n", prog_name, servicesf); } codepage_initialise(lp_client_code_page()); /* Get the real uid */ real_uid = getuid(); /* Check the effective uid */ if ((geteuid() == 0) && (real_uid != 0)) { fprintf(stderr, "%s: Must *NOT* be setuid root.\n", prog_name); exit(1); } is_root = (real_uid == 0); while ((ch = getopt(argc, argv, "adhmnr:R:D:")) != 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; strcpy(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; strcpy(new_passwd, "NO PASSWORD"); } else usage(prog_name, is_root); case 'r': remote_machine = optarg; break; case 'R': if(is_root) { lp_set_name_resolve_order(optarg); break; } else usage(prog_name, is_root); case 'm': if(is_root) { machine_account = True; } else usage(prog_name, is_root); break; case 'h': default: usage(prog_name, is_root); } } argc -= optind; argv += optind; /* * Ensure add_user and remote machine are * not both set. */ if(add_user && (remote_machine != NULL)) usage(prog_name, True); 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(machine_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'; } } /* * Setup the pwd struct to point to known * values for a machine account (it doesn't * exist in /etc/passwd). */ if((pwd = getpwnam(user_name)) == NULL) { fprintf(stderr, "%s: User \"%s\" was not found in system password file.\n", prog_name, user_name); exit(1); } } else { if((pwd = getpwuid(real_uid)) != NULL) pstrcpy( user_name, pwd->pw_name); } } else { if(add_user) { fprintf(stderr, "%s: Only root can set anothers password.\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((pwd = getpwuid(real_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 && machine_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 = getpass("Old SMB password:"); fstrcpy(old_passwd, p); } if (!got_new_pass) { new_passwd[0] = '\0'; p = getpass("New SMB password:"); strncpy(new_passwd, p, sizeof(fstring)); new_passwd[sizeof(fstring)-1] = '\0'; p = getpass("Retype new SMB password:"); 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); } /* * 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; fstring myname; if(get_myname(myname,NULL) == False) { fprintf(stderr, "%s: unable to get my hostname.\n", prog_name ); exit(1); } if(!resolve_name( remote_machine, &ip)) { fprintf(stderr, "%s: unable to find an IP address for machine %s.\n", prog_name, remote_machine ); exit(1); } memset(&cli, '\0', sizeof(struct cli_state)); 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, get_error_message(&cli) ); exit(1); } if (!cli_session_request(&cli, remote_machine, 0x20, myname)) { fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n", prog_name, remote_machine, get_error_message(&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, get_error_message(&cli) ); cli_shutdown(&cli); exit(1); } if (!cli_session_setup(&cli, user_name, old_passwd, strlen(old_passwd), "", 0, "")) { fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n", prog_name, remote_machine, get_error_message(&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, get_error_message(&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, get_error_message(&cli) ); cli_shutdown(&cli); exit(1); } cli_shutdown(&cli); exit(0); } /* * Check for a machine account. */ if(machine_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. */ memset(new_nt_p16, '\0', 16); E_md4hash((uchar *) new_passwd, new_nt_p16); /* Mangle the password into Lanman format */ new_passwd[14] = '\0'; strupper(new_passwd); /* * Calculate the SMB (lanman) hash functions of the new password. */ memset(new_p16, '\0', 16); E_P16((uchar *) new_passwd, new_p16); /* * Open the smbpaswd file. */ vp = startsmbpwent(True); if (!vp && errno == ENOENT) { fp = fopen(lp_smb_passwd_file(), "w"); if (fp) { fprintf(fp, "# Samba SMB password file\n"); fclose(fp); vp = startsmbpwent(True); } } if (!fp) { 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 = (machine_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) { /* * This currently won't work as it means changing * the length of the record. JRA. */ smb_pwent->acct_ctrl |= ACB_DISABLED; smb_pwent->smb_passwd = NULL; smb_pwent->smb_nt_passwd = NULL; } else if (set_no_password) { /* * This currently won't work as it means changing * the length of the record. JRA. */ smb_pwent->acct_ctrl |= ACB_PWNOTREQ; smb_pwent->smb_passwd = NULL; smb_pwent->smb_nt_passwd = NULL; } else { smb_pwent->smb_passwd = new_p16; smb_pwent->smb_nt_passwd = new_nt_p16; } if(mod_smbpwd_entry(smb_pwent) == 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 (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; }