/*

   pam_prompt.c - replacement function for pam_prompt()

   Copyright (C) 2010, 2012 Arthur de Jong

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   This library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this library; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

   02110-1301 USA

*/

#include "config.h"

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include "compat/attrs.h"

#include "compat/pam_compat.h"

int pam_prompt(pam_handle_t *pamh, int style, char **response,

               const char *format, ...)

{

  int rc;

  struct pam_conv *aconv;

  char buffer[200];

  va_list ap;

  struct pam_message msg, *pmsg;

  struct pam_response *resp;

  /* the the conversion function */

  rc = pam_get_item(pamh, PAM_CONV, (PAM_ITEM_CONST void **)&aconv);

  if (rc != PAM_SUCCESS)

    return rc;

  /* make the message string */

  va_start(ap, format);

  vsnprintf(buffer, sizeof(buffer), format, ap);

  buffer[sizeof(buffer) - 1] = '\0';

  va_end(ap);

  /* build the message */

  msg.msg_style = style;

  msg.msg = buffer;

  pmsg = &msg;

  resp = NULL;

  rc = aconv->conv(1, (const struct pam_message **)&pmsg, &resp, aconv->appdata_ptr);

  if (rc != PAM_SUCCESS)

    return rc;

  /* assign response if it is set */

  if (response != NULL)

  {

    if (resp == NULL)

      return PAM_CONV_ERR;

    if (resp[0].resp == NULL)

    {

      free(resp);

      return PAM_CONV_ERR;

    }

    *response = resp[0].resp;

  }

  else

    free(resp[0].resp);

  free(resp);

  return PAM_SUCCESS;

}