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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* 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; version 2 of the License.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
Sections of this were taken/modified from mod_auth_path for Apache
@TODO: License?
*/
#include "config.h"
#include <security/pam_appl.h>
#if !defined(__sun) && !defined(__FreeBSD__)
#include <security/pam_misc.h>
#endif
#include "drizzled/security_context.h"
#include "drizzled/plugin/authentication.h"
using namespace drizzled;
typedef struct {
const char *name;
const char *password;
} auth_pam_userinfo;
extern "C"
int auth_pam_talker(int num_msg,
#ifdef __sun
struct pam_message **msg,
#else
const struct pam_message **msg,
#endif
struct pam_response **resp,
void *appdata_ptr);
int auth_pam_talker(int num_msg,
#ifdef __sun
struct pam_message **msg,
#else
const struct pam_message **msg,
#endif
struct pam_response **resp,
void *appdata_ptr)
{
auth_pam_userinfo *userinfo = (auth_pam_userinfo*)appdata_ptr;
struct pam_response *response = 0;
int x;
/* parameter sanity checking */
if(!resp || !msg || !userinfo)
return PAM_CONV_ERR;
/* allocate memory to store response */
response= (struct pam_response*)malloc(num_msg * sizeof(struct pam_response));
if(!response)
return PAM_CONV_ERR;
/* copy values */
for(x= 0; x < num_msg; x++)
{
/* initialize to safe values */
response[x].resp_retcode= 0;
response[x].resp= 0;
/* select response based on requested output style */
switch(msg[x]->msg_style)
{
case PAM_PROMPT_ECHO_ON:
/* on memory allocation failure, auth fails */
response[x].resp = strdup(userinfo->name);
break;
case PAM_PROMPT_ECHO_OFF:
response[x].resp = strdup(userinfo->password);
break;
default:
if(response)
free(response);
return PAM_CONV_ERR;
}
}
/* everything okay, set PAM response values */
*resp = response;
return PAM_SUCCESS;
}
class Auth_pam : public drizzled::plugin::Authentication
{
public:
Auth_pam(std::string name_arg)
: drizzled::plugin::Authentication(name_arg) {}
virtual bool authenticate(const SecurityContext &sctx,
const std::string &password)
{
int retval;
auth_pam_userinfo userinfo= { NULL, NULL };
struct pam_conv conv_info= { &auth_pam_talker, (void*)&userinfo };
pam_handle_t *pamh= NULL;
userinfo.name= sctx.getUser().c_str();
userinfo.password= password.c_str();
retval= pam_start("drizzle", userinfo.name, &conv_info, &pamh);
if (retval == PAM_SUCCESS)
retval= pam_authenticate(pamh, PAM_DISALLOW_NULL_AUTHTOK);
if (retval == PAM_SUCCESS)
retval= pam_acct_mgmt(pamh, PAM_DISALLOW_NULL_AUTHTOK);
pam_end(pamh, retval);
return (retval == PAM_SUCCESS) ? true: false;
}
};
static Auth_pam *auth= NULL;
static int initialize(drizzled::plugin::Context &context)
{
auth= new Auth_pam("auth_pam");
context.add(auth);
return 0;
}
DRIZZLE_DECLARE_PLUGIN
{
DRIZZLE_VERSION_ID,
"pam",
"0.1",
"Brian Aker",
"PAM based authenication.",
PLUGIN_LICENSE_GPL,
initialize, /* Plugin Init */
NULL, /* system variables */
NULL /* config options */
}
DRIZZLE_DECLARE_PLUGIN_END;
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