source3/utils/passwd_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    passdb editing frontend
   4
   5    Copyright (C) Jeremy Allison  1998
   6    Copyright (C) Andrew Tridgell 1998
   7    Copyright (C) Tim Potter      2000
   8    Copyright (C) Simo Sorce      2000
   9    Copyright (C) Martin Pool     2001
  10    Copyright (C) Gerald Carter   2002
  11    Copyright (C) Andrew Bartlett 2003
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 3 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25 */
  26
  27 #include "includes.h"
  28 #include "passwd_proto.h"
  29
  30 /*************************************************************
  31  Utility function to prompt for passwords from stdin. Each
  32  password entered must end with a newline.
  33 *************************************************************/
  34 static char *stdin_new_passwd( void)
  35 {
  36         static fstring new_pw;
  37         size_t len;
  38
  39         ZERO_ARRAY(new_pw);
  40
  41         /*
  42          * if no error is reported from fgets() and string at least contains
  43          * the newline that ends the password, then replace the newline with
  44          * a null terminator.
  45          */
  46         if ( fgets(new_pw, sizeof(new_pw), stdin) == NULL) {
  47                 return NULL;
  48         }
  49         if ((len = strlen(new_pw)) > 0) {
  50                 if(new_pw[len-1] == '\n')
  51                         new_pw[len - 1] = 0;
  52         }
  53         return(new_pw);
  54 }
  55
  56 /*************************************************************
  57  Utility function to get passwords via tty or stdin
  58  Used if the '-s' (smbpasswd) or '-t' (pdbedit) option is set
  59  to silently get passwords to enable scripting.
  60 *************************************************************/
  61 char *get_pass( const char *prompt, bool stdin_get)
  62 {
  63         char pwd[256] = {0};
  64         char *p;
  65         int rc;
  66
  67         if (stdin_get) {
  68                 p = stdin_new_passwd();
  69                 if (p == NULL) {
  70                         return NULL;
  71                 }
  72         } else {
  73                 rc = samba_getpass(prompt, pwd, sizeof(pwd), false, false);
  74                 if (rc < 0) {
  75                         return NULL;
  76                 }
  77                 p = pwd;
  78         }
  79         return smb_xstrdup( p);
  80 }