auth/credentials/credentials_cmdline.c

   1 /*
   2  * Copyright (c) 2005      Jelmer Vernooij <jelmer@samba.org>
   3  * Copyright (c) 2016      Stefan Metzmacher <metze@samba.org>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "includes.h"
  20 #include "system/filesys.h"
  21 #include "auth/credentials/credentials.h"
  22
  23 static const char *cmdline_get_userpassword(struct cli_credentials *creds)
  24 {
  25         TALLOC_CTX *frame = talloc_stackframe();
  26         const char *name = NULL;
  27         char *label = NULL;
  28         char *ret = NULL;
  29         char pwd[256] = {0};
  30         int rc;
  31
  32         name = cli_credentials_get_unparsed_name(creds, frame);
  33         if (name == NULL) {
  34                 goto fail;
  35         }
  36         label = talloc_asprintf(frame, "Password for [%s]:", name);
  37         if (label == NULL) {
  38                 goto fail;
  39         }
  40         rc = samba_getpass(label, pwd, sizeof(pwd), false, false);
  41         if (rc != 0) {
  42                 goto fail;
  43         }
  44         ret = talloc_strdup(creds, pwd);
  45         if (ret == NULL) {
  46                 goto fail;
  47         }
  48         talloc_set_name_const(ret, __location__);
  49 fail:
  50         ZERO_STRUCT(pwd);
  51         TALLOC_FREE(frame);
  52         return ret;
  53 }
  54
  55 /**
  56  * @brief Set the command line password callback.
  57  *
  58  * This will set the callback to get the password from the command prompt or
  59  * read it from 'stdin'.
  60  *
  61  * @param[in]  cred   The credential context.
  62  *
  63  * @return On success true, false otherwise.
  64  */
  65 bool cli_credentials_set_cmdline_callbacks(struct cli_credentials *cred)
  66 {
  67         /*
  68          * If there is no tty, we will try to read the password from
  69          * stdin.
  70          */
  71         return cli_credentials_set_password_callback(cred,
  72                                                      cmdline_get_userpassword);
  73 }