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/*
* VeyonAuthHelper.cpp - main file for Veyon Authentication Helper
*
* Copyright (c) 2010-2019 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - http://veyon.io
*
* 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 2 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include <QDataStream>
#include <QFile>
#include <security/pam_appl.h>
static char* pam_username = nullptr;
static char* pam_password = nullptr;
static int pam_conv( int num_msg, const struct pam_message **msg,
struct pam_response **resp,
void *appdata_ptr )
{
struct pam_response *reply = nullptr;
reply = (pam_response *) malloc( sizeof(struct pam_response) * num_msg );
if( !reply )
{
return PAM_CONV_ERR;
}
for( int replies = 0; replies < num_msg; ++replies )
{
switch( msg[replies]->msg_style )
{
case PAM_PROMPT_ECHO_ON:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = pam_username;
break;
case PAM_PROMPT_ECHO_OFF:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = pam_password;
break;
case PAM_TEXT_INFO:
case PAM_ERROR_MSG:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = nullptr;
break;
default:
free( reply );
return PAM_CONV_ERR;
}
}
*resp = reply;
return PAM_SUCCESS;
}
int main()
{
QString username, password;
QFile stdIn;
stdIn.open( 0, QFile::ReadOnly );
QDataStream ds( &stdIn );
ds >> username;
ds >> password;
pam_username = qstrdup( username.toUtf8().constData() );
pam_password = qstrdup( password.toUtf8().constData() );
struct pam_conv pconv = { &pam_conv, nullptr };
pam_handle_t *pamh;
int err = pam_start( "su", nullptr, &pconv, &pamh );
if( err == PAM_SUCCESS )
{
err = pam_authenticate( pamh, PAM_SILENT );
if( err != PAM_SUCCESS )
{
printf( "pam_authenticate: %s\n", pam_strerror( pamh, err ) );
}
}
else
{
printf( "pam_start: %s\n", pam_strerror( pamh, err ) );
}
pam_end( pamh, err );
delete[] pam_username;
delete[] pam_password;
return err == PAM_SUCCESS ? 0 : -1;
}
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