From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/utils/smbpasswd.c | 678 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 678 insertions(+) create mode 100644 source3/utils/smbpasswd.c (limited to 'source3/utils/smbpasswd.c') diff --git a/source3/utils/smbpasswd.c b/source3/utils/smbpasswd.c new file mode 100644 index 0000000..f2c5dfd --- /dev/null +++ b/source3/utils/smbpasswd.c @@ -0,0 +1,678 @@ +/* + * 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" +#include "lib/param/param.h" +#include "lib/util/memcache.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, + struct loadparm_context *lp_ctx) +{ + 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': + lpcfg_set_cmdline(lp_ctx, "name resolve order", optarg); + break; + case 'D': + lpcfg_set_cmdline(lp_ctx, "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(); + struct loadparm_context *lp_ctx = NULL; + struct memcache *mcache = NULL; + int local_flags = 0; + int ret; + + mcache = memcache_init(NULL, 0); + if (mcache == NULL) { + fprintf(stderr, "%s: memcache_init failed\n", __location__); + return 1; + } + memcache_set_global(mcache); + +#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(); + + lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers()); + if (lp_ctx == NULL) { + fprintf(stderr, + "Failed to initialise the global parameter structure.\n"); + return 1; + } + + local_flags = process_options(argc, argv, local_flags, lp_ctx); + + 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); + } + + gfree_all(); + + TALLOC_FREE(frame); + return ret; +} -- cgit v1.2.3