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/*
* FreeIPA 2FA companion daemon
*
* Authors: Nathaniel McCallum <npmccallum@redhat.com>
*
* Copyright (C) 2013 Nathaniel McCallum, Red Hat
* see file 'COPYING' for use and warranty information
*
* 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 3 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. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file parses the user's configuration received from LDAP (see query.c).
*/
#include "internal.h"
#include <ctype.h>
#define DEFAULT_TIMEOUT 15
#define DEFAULT_RETRIES 3
/* Convert an LDAP entry into an allocated string. */
static int get_string(LDAP *ldp, LDAPMessage *entry, const char *name,
char **out)
{
struct berval **vals;
ber_len_t i;
char *buf;
vals = ldap_get_values_len(ldp, entry, name);
if (vals == NULL)
return ENOENT;
buf = calloc(vals[0]->bv_len + 1, sizeof(char));
if (buf == NULL) {
ldap_value_free_len(vals);
return ENOMEM;
}
for (i = 0; i < vals[0]->bv_len; i++) {
if (!isprint(vals[0]->bv_val[i])) {
free(buf);
ldap_value_free_len(vals);
return EINVAL;
}
buf[i] = vals[0]->bv_val[i];
}
if (*out != NULL)
free(*out);
*out = buf;
ldap_value_free_len(vals);
return 0;
}
/* Convert an LDAP entry into an unsigned long. */
static int get_ulong(LDAP *ldp, LDAPMessage *entry, const char *name,
unsigned long *out)
{
struct berval **vals;
char buffer[32];
vals = ldap_get_values_len(ldp, entry, name);
if (vals == NULL)
return ENOENT;
if (vals[0]->bv_len > sizeof(buffer) - 1) {
ldap_value_free_len(vals);
return ERANGE;
}
memcpy(buffer, vals[0]->bv_val, vals[0]->bv_len);
buffer[vals[0]->bv_len] = '\0';
ldap_value_free_len(vals);
*out = strtoul(buffer, NULL, 10);
if (*out == ULONG_MAX)
return errno;
return 0;
}
/* Parse basic user configuration. */
const char *otpd_parse_user(LDAP *ldp, LDAPMessage *entry,
struct otpd_queue_item *item)
{
int i, j;
i = get_string(ldp, entry, "uid", &item->user.uid);
if (i != 0)
return strerror(i);
i = get_string(ldp, entry, "ipatokenRadiusUserName",
&item->user.ipatokenRadiusUserName);
if (i != 0 && i != ENOENT)
return strerror(i);
i = get_string(ldp, entry, "ipatokenRadiusConfigLink",
&item->user.ipatokenRadiusConfigLink);
if (i != 0 && i != ENOENT)
return strerror(i);
/* Get the DN. */
item->user.dn = ldap_get_dn(ldp, entry);
if (item->user.dn == NULL) {
i = ldap_get_option(ldp, LDAP_OPT_RESULT_CODE, &j);
return ldap_err2string(i == LDAP_OPT_SUCCESS ? j : i);
}
return NULL;
}
/* Parse the user's RADIUS configuration. */
const char *otpd_parse_radius(LDAP *ldp, LDAPMessage *entry,
struct otpd_queue_item *item)
{
unsigned long l;
int i;
i = get_string(ldp, entry, "ipatokenRadiusServer",
&item->radius.ipatokenRadiusServer);
if (i != 0)
return strerror(i);
i = get_string(ldp, entry, "ipatokenRadiusSecret",
&item->radius.ipatokenRadiusSecret);
if (i != 0)
return strerror(i);
i = get_string(ldp, entry, "ipatokenUserMapAttribute",
&item->radius.ipatokenUserMapAttribute);
if (i != 0 && i != ENOENT)
return strerror(i);
i = get_ulong(ldp, entry, "ipatokenRadiusTimeout", &l);
if (i == ENOENT)
l = DEFAULT_TIMEOUT;
else if (i != 0)
return strerror(i);
item->radius.ipatokenRadiusTimeout = l * 1000;
i = get_ulong(ldp, entry, "ipatokenRadiusRetries", &l);
if (i == ENOENT)
l = DEFAULT_RETRIES;
else if (i != 0)
return strerror(i);
item->radius.ipatokenRadiusRetries = l;
return NULL;
}
/* Parse the user's RADIUS username. */
const char *otpd_parse_radius_username(LDAP *ldp, LDAPMessage *entry,
struct otpd_queue_item *item)
{
int i;
i = get_string(ldp, entry, item->radius.ipatokenUserMapAttribute,
&item->user.other);
if (i != 0)
return strerror(i);
return NULL;
}
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