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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2002, 2007 Free Software Foundation, Inc.
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 3 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 */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#ifdef HAVE_SHADOW_H
# include <shadow.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_SECURITY_PAM_APPL_H
# include <security/pam_appl.h>
#endif
#ifdef HAVE_CRYPT_H
# include <crypt.h>
#endif
#include <mailutils/list.h>
#include <mailutils/iterator.h>
#include <mailutils/mailbox.h>
#include <mailutils/argp.h>
#include <mailutils/mu_auth.h>
#include <mailutils/nls.h>
char *pam_service = NULL;
#ifdef USE_LIBPAM
#define COPY_STRING(s) (s) ? strdup(s) : NULL
static char *_pwd;
static char *_user;
static int _perr = 0;
static int
mu_pam_conv (int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr MU_ARG_UNUSED)
{
int replies = 0;
struct pam_response *reply = NULL;
reply = malloc (sizeof (*reply) * num_msg);
if (!reply)
return PAM_CONV_ERR;
for (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 = COPY_STRING (_user);
/* PAM frees resp */
break;
case PAM_PROMPT_ECHO_OFF:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = COPY_STRING (_pwd);
/* PAM frees resp */
break;
case PAM_TEXT_INFO:
case PAM_ERROR_MSG:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = NULL;
break;
default:
free (reply);
_perr = 1;
return PAM_CONV_ERR;
}
}
*resp = reply;
return PAM_SUCCESS;
}
static struct pam_conv PAM_conversation = { &mu_pam_conv, NULL };
int
mu_authenticate_pam (struct mu_auth_data **return_data MU_ARG_UNUSED,
const void *key,
void *func_data MU_ARG_UNUSED,
void *call_data)
{
const struct mu_auth_data *auth_data = key;
char *pass = call_data;
pam_handle_t *pamh;
int pamerror;
#define PAM_ERROR if (_perr || (pamerror != PAM_SUCCESS)) \
goto pam_errlab;
if (!auth_data)
return 1;
_user = (char *) auth_data->name;
_pwd = pass;
pamerror = pam_start (pam_service, _user, &PAM_conversation, &pamh);
PAM_ERROR;
pamerror = pam_authenticate (pamh, 0);
PAM_ERROR;
pamerror = pam_acct_mgmt (pamh, 0);
PAM_ERROR;
pamerror = pam_setcred (pamh, PAM_ESTABLISH_CRED);
pam_errlab:
pam_end (pamh, PAM_SUCCESS);
return pamerror != PAM_SUCCESS;
}
#define ARG_PAM_SERVICE 1
static error_t
mu_pam_argp_parser (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARG_PAM_SERVICE:
pam_service = arg;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp_option mu_pam_argp_option[] = {
{ "pam-service", ARG_PAM_SERVICE, N_("STRING"), 0,
N_("Use STRING as PAM service name"), 0},
{ NULL, 0, NULL, 0, NULL, 0 }
};
struct argp mu_pam_argp = {
mu_pam_argp_option,
mu_pam_argp_parser,
};
#else
int
mu_authenticate_pam (struct mu_auth_data **return_data MU_ARG_UNUSED,
const void *key MU_ARG_UNUSED,
void *func_data MU_ARG_UNUSED,
void *call_data MU_ARG_UNUSED)
{
errno = ENOSYS;
return 1;
}
#endif
struct mu_auth_module mu_auth_pam_module = {
"pam",
#ifdef USE_LIBPAM
&mu_pam_argp,
#else
NULL,
#endif
mu_authenticate_pam,
NULL,
mu_auth_nosupport,
NULL,
mu_auth_nosupport,
NULL
};
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