/* * Unix SMB/CIFS 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 3 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, see . */ #include "includes.h" #include "system/passwd.h" #include "secrets.h" #include "../librpc/gen_ndr/samr.h" #include "../lib/util/util_pw.h" #include "libsmb/proto.h" #include "passdb.h" #include "cmdline_contexts.h" #include "passwd_proto.h" #include "lib/util/string_wrappers.h" /* * 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 got_username = False; static bool stdin_passwd_get = False; static fstring user_name; static char *new_passwd = NULL; static const char *remote_machine = NULL; static fstring ldap_secret; /********************************************************* Print command usage on stderr and die. **********************************************************/ static void usage(void) { printf("When run by root:\n"); printf(" smbpasswd [options] [username]\n"); printf("otherwise:\n"); printf(" smbpasswd [options]\n\n"); printf("options:\n"); printf(" -L local mode (must be first option)\n"); printf(" -h print this usage message\n"); printf(" -s use stdin for password prompt\n"); printf(" -c smb.conf file Use the given path to the smb.conf file\n"); printf(" -D LEVEL debug level\n"); printf(" -r MACHINE remote machine\n"); printf(" -U USER remote username (e.g. SAM/user)\n"); printf("extra options when run by root or in local mode:\n"); printf(" -a add user\n"); printf(" -d disable user\n"); printf(" -e enable user\n"); printf(" -i interdomain trust account\n"); printf(" -m machine trust account\n"); printf(" -n set no password\n"); printf(" -W use stdin ldap admin password\n"); printf(" -w PASSWORD ldap admin password\n"); printf(" -x delete user\n"); printf(" -R ORDER name resolve order\n"); exit(1); } static void set_line_buffering(FILE *f) { setvbuf(f, NULL, _IOLBF, 0); } /******************************************************************* Process command line options ******************************************************************/ static int process_options(int argc, char **argv, int local_flags) { int ch; const char *configfile = get_dyn_CONFIGFILE(); local_flags |= LOCAL_SET_PASSWORD; ZERO_STRUCT(user_name); user_name[0] = '\0'; while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LWS:")) != EOF) { switch(ch) { case 'L': if (getuid() != 0) { fprintf(stderr, "smbpasswd -L can only be used by root.\n"); exit(1); } local_flags |= LOCAL_AM_ROOT; break; case 'c': configfile = optarg; set_dyn_CONFIGFILE(optarg); 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 'i': local_flags |= LOCAL_INTERDOM_ACCOUNT; break; case 'j': d_printf("See 'net join' for this functionality\n"); exit(1); break; case 'n': local_flags |= LOCAL_SET_NO_PASSWORD; local_flags &= ~LOCAL_SET_PASSWORD; SAFE_FREE(new_passwd); new_passwd = smb_xstrdup("NO PASSWORD"); 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 'w': local_flags |= LOCAL_SET_LDAP_ADMIN_PW; fstrcpy(ldap_secret, optarg); break; case 'R': lp_set_cmdline("name resolve order", optarg); break; case 'D': lp_set_cmdline("log level", optarg); break; case 'U': { got_username = True; fstrcpy(user_name, optarg); break; case 'W': local_flags |= LOCAL_SET_LDAP_ADMIN_PW; *ldap_secret = '\0'; break; } case 'h': default: usage(); } } argc -= optind; argv += optind; switch(argc) { case 0: if (!got_username) fstrcpy(user_name, ""); break; case 1: if (!(local_flags & LOCAL_AM_ROOT)) { usage(); } else { if (got_username) { usage(); } else { fstrcpy(user_name, argv[0]); } } break; default: usage(); } if (!lp_load_global(configfile)) { fprintf(stderr, "Can't load %s - run testparm to debug it\n", configfile); exit(1); } return local_flags; } /************************************************************* Utility function to prompt for new password. *************************************************************/ static char *prompt_for_new_password(bool stdin_get) { char *p; fstring new_pw; ZERO_ARRAY(new_pw); p = get_pass("New SMB password:", stdin_get); if (p == NULL) { return NULL; } fstrcpy(new_pw, p); SAFE_FREE(p); p = get_pass("Retype new SMB password:", stdin_get); if (p == NULL) { return NULL; } if (strcmp(p, new_pw)) { fprintf(stderr, "Mismatch - password unchanged.\n"); ZERO_ARRAY(new_pw); SAFE_FREE(p); return NULL; } return p; } /************************************************************* Change a password either locally or remotely. *************************************************************/ static NTSTATUS password_change(const char *remote_mach, const char *domain, const char *username, const char *old_passwd, const char *new_pw, int local_flags) { NTSTATUS ret; char *err_str = NULL; char *msg_str = NULL; if (remote_mach != 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 */ fprintf(stderr, "Invalid remote operation!\n"); return NT_STATUS_UNSUCCESSFUL; } ret = remote_password_change(remote_mach, domain, username, old_passwd, new_pw, &err_str); } else { ret = local_password_change(username, local_flags, new_pw, &err_str, &msg_str); } if (msg_str) { printf("%s", msg_str); } if (err_str) { fprintf(stderr, "%s", err_str); } if (!NT_STATUS_IS_OK(ret) && !err_str) { fprintf(stderr, "Failed to change password!\n"); } SAFE_FREE(msg_str); SAFE_FREE(err_str); return ret; } /******************************************************************* Store the LDAP admin password in secrets.tdb ******************************************************************/ static bool store_ldap_admin_pw (char* pw) { if (!pw) return False; if (!secrets_init()) return False; return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw); } /************************************************************* Handle password changing for root. *************************************************************/ static int process_root(int local_flags) { struct passwd *pwd; int result = 0; char *old_passwd = NULL; if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) { const char *ldap_admin_dn = lp_ldap_admin_dn(); if ( ! *ldap_admin_dn ) { DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n")); goto done; } printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn); if ( ! *ldap_secret ) { new_passwd = prompt_for_new_password(stdin_passwd_get); if (new_passwd == NULL) { fprintf(stderr, "Failed to read new password!\n"); exit(1); } fstrcpy(ldap_secret, new_passwd); } if (!store_ldap_admin_pw(ldap_secret)) { DEBUG(0,("ERROR: Failed to store the ldap admin password!\n")); } goto done; } /* Ensure passdb startup(). */ if(!initialize_password_db(False, NULL)) { DEBUG(0, ("Failed to open passdb!\n")); exit(1); } /* Ensure we have a SAM sid. */ get_global_sam_sid(); /* * 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(); } if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) { fstrcpy(user_name, pwd->pw_name); TALLOC_FREE(pwd); } if (!user_name[0]) { fprintf(stderr,"You must specify a username\n"); exit(1); } if (local_flags & LOCAL_TRUST_ACCOUNT) { /* add the $ automatically */ size_t user_name_len = strlen(user_name); if (user_name[user_name_len - 1] == '$') { user_name_len--; } else { if (user_name_len + 2 > sizeof(user_name)) { fprintf(stderr, "machine name too long\n"); exit(1); } user_name[user_name_len] = '$'; user_name[user_name_len + 1] = '\0'; } if (local_flags & LOCAL_ADD_USER) { SAFE_FREE(new_passwd); /* * Remove any trailing '$' before we * generate the initial machine password. */ new_passwd = smb_xstrndup(user_name, user_name_len); if (!strlower_m(new_passwd)) { fprintf(stderr, "strlower_m %s failed\n", new_passwd); exit(1); } } } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) { size_t user_name_len = strlen(user_name); if (user_name[user_name_len - 1] != '$') { if (user_name_len + 2 > sizeof(user_name)) { fprintf(stderr, "machine name too long\n"); exit(1); } user_name[user_name_len] = '$'; user_name[user_name_len + 1] = '\0'; } if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) { /* * Prompt for trusting domain's account password */ new_passwd = prompt_for_new_password(stdin_passwd_get); if(!new_passwd) { fprintf(stderr, "Unable to get newpassword.\n"); exit(1); } } } else { if (remote_machine != NULL) { old_passwd = get_pass("Old SMB password:",stdin_passwd_get); if(!old_passwd) { fprintf(stderr, "Unable to get old password.\n"); exit(1); } } 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) { struct samu *sampass = NULL; sampass = samu_new( NULL ); if (!sampass) { fprintf(stderr, "talloc fail for struct samu.\n"); exit(1); } if (!pdb_getsampwnam(sampass, user_name)) { fprintf(stderr, "Failed to find user %s in passdb backend.\n", user_name ); exit(1); } if(pdb_get_nt_passwd(sampass) == NULL) { local_flags |= LOCAL_SET_PASSWORD; } TALLOC_FREE(sampass); } } if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) { new_passwd = prompt_for_new_password(stdin_passwd_get); if(!new_passwd) { fprintf(stderr, "Unable to get new password.\n"); exit(1); } } } if (!NT_STATUS_IS_OK(password_change(remote_machine, NULL, user_name, old_passwd, new_passwd, local_flags))) { result = 1; goto done; } if(remote_machine) { printf("Password changed for user %s on %s.\n", user_name, remote_machine ); } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) { struct samu *sampass = NULL; sampass = samu_new( NULL ); if (!sampass) { fprintf(stderr, "talloc fail for struct samu.\n"); exit(1); } if (!pdb_getsampwnam(sampass, user_name)) { fprintf(stderr, "Failed to find user %s in passdb backend.\n", user_name ); exit(1); } printf("Password changed for user %s.", user_name ); if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) { printf(" User has disabled flag set."); } if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) { printf(" User has no password flag set."); } printf("\n"); TALLOC_FREE(sampass); } done: SAFE_FREE(old_passwd); SAFE_FREE(new_passwd); return result; } /************************************************************* Handle password changing for non-root. *************************************************************/ static int process_nonroot(int local_flags) { struct passwd *pwd = NULL; int result = 0; char *old_pw = NULL; char *new_pw = NULL; const char *username = user_name; const char *domain = NULL; char *p = NULL; if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) { /* Extra flags that we can't honor non-root */ usage(); } if (!user_name[0]) { pwd = getpwuid_alloc(talloc_tos(), getuid()); if (pwd) { fstrcpy(user_name,pwd->pw_name); TALLOC_FREE(pwd); } else { fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid()); exit(1); } } /* Allow domain as part of the username */ if ((p = strchr_m(user_name, '\\')) || (p = strchr_m(user_name, '/')) || (p = strchr_m(user_name, *lp_winbind_separator()))) { *p = '\0'; username = p + 1; domain = user_name; } /* * 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) { if (!is_ipaddress(remote_machine)) { domain = remote_machine; } } else { remote_machine = "127.0.0.1"; /* * If we deal with a local user, change the password for the * user in our SAM. */ domain = get_global_sam_name(); } old_pw = get_pass("Old SMB password:",stdin_passwd_get); if (old_pw == NULL) { fprintf(stderr, "Unable to get old password.\n"); exit(1); } if (!new_passwd) { new_pw = prompt_for_new_password(stdin_passwd_get); } else new_pw = smb_xstrdup(new_passwd); if (!new_pw) { fprintf(stderr, "Unable to get new password.\n"); exit(1); } if (!NT_STATUS_IS_OK(password_change(remote_machine, domain, username, old_pw, new_pw, 0))) { result = 1; goto done; } printf("Password changed for user %s\n", username); done: SAFE_FREE(old_pw); SAFE_FREE(new_pw); return result; } /********************************************************* Start here. **********************************************************/ int main(int argc, char **argv) { TALLOC_CTX *frame = talloc_stackframe(); int local_flags = 0; int ret; #if defined(HAVE_SET_AUTH_PARAMETERS) set_auth_parameters(argc, argv); #endif /* HAVE_SET_AUTH_PARAMETERS */ if (getuid() == 0) { local_flags = LOCAL_AM_ROOT; } smb_init_locale(); local_flags = process_options(argc, argv, local_flags); setup_logging("smbpasswd", DEBUG_STDERR); /* 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); } if (local_flags & LOCAL_AM_ROOT) { bool ok; ok = secrets_init(); if (!ok) { return 1; } ret = process_root(local_flags); } else { ret = process_nonroot(local_flags); } TALLOC_FREE(frame); return ret; }