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/*
* Copyright (C) 2006 Martin Koegler
* Copyright (C) 2010 TigerVNC Team
*
* This 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 2 of the License, or
* (at your option) any later version.
*
* This software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifndef HAVE_PAM
#error "This source should not be compiled when PAM is unsupported"
#endif
#include <stdlib.h>
#include <string.h>
#include <security/pam_appl.h>
#include <rfb/pam.h>
typedef struct
{
const char *username;
const char *password;
} AuthData;
static int pam_callback(int count, const struct pam_message **in,
struct pam_response **out, void *ptr)
{
int i;
AuthData *auth = (AuthData *) ptr;
struct pam_response *resp =
(struct pam_response *) malloc (sizeof (struct pam_response) * count);
if (!resp && count)
return PAM_CONV_ERR;
for (i = 0; i < count; i++) {
resp[i].resp_retcode = PAM_SUCCESS;
switch (in[i]->msg_style) {
case PAM_TEXT_INFO:
case PAM_ERROR_MSG:
resp[i].resp = 0;
break;
case PAM_PROMPT_ECHO_ON: /* Send Username */
resp[i].resp = strdup(auth->username);
break;
case PAM_PROMPT_ECHO_OFF: /* Send Password */
resp[i].resp = strdup(auth->password);
break;
default:
free(resp);
return PAM_CONV_ERR;
}
}
*out = resp;
return PAM_SUCCESS;
}
int do_pam_auth(const char *service, const char *username, const char *password)
{
int ret;
AuthData auth = { username, password };
struct pam_conv conv = {
pam_callback,
&auth
};
pam_handle_t *h = 0;
ret = pam_start(service, username, &conv, &h);
if (ret == PAM_SUCCESS)
ret = pam_authenticate(h, 0);
if (ret == PAM_SUCCESS)
ret = pam_acct_mgmt(h, 0);
pam_end(h, ret);
return ret == PAM_SUCCESS ? 1 : 0;
}
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