bin/named/tkeyconf.c

/*
 * Copyright (C) 1999-2001, 2004-2007, 2009, 2010, 2012, 2014, 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* $Id: tkeyconf.c,v 1.33 2010/12/20 23:47:20 tbox Exp $ */

/*! \file */

#include <config.h>

#include <isc/buffer.h>
#include <isc/string.h>     /* Required for HP/UX (and others?) */
#include <isc/mem.h>

#include <isccfg/cfg.h>

#include <dns/fixedname.h>
#include <dns/keyvalues.h>
#include <dns/name.h>
#include <dns/tkey.h>

#include <dst/gssapi.h>

#include <named/tkeyconf.h>

#define RETERR(x) do { \
    result = (x); \
    if (result != ISC_R_SUCCESS) \
        goto failure; \
    } while (0)

#include<named/log.h>
#define LOG(msg) \
    isc_log_write(ns_g_lctx, \
    NS_LOGCATEGORY_GENERAL, \
    NS_LOGMODULE_SERVER, \
    ISC_LOG_ERROR, \
    "%s", msg)

isc_result_t
ns_tkeyctx_fromconfig(const cfg_obj_t *options, isc_mem_t *mctx,
              isc_entropy_t *ectx, dns_tkeyctx_t **tctxp)
{
    isc_result_t result;
    dns_tkeyctx_t *tctx = NULL;
    const char *s;
    isc_uint32_t n;
    dns_fixedname_t fname;
    dns_name_t *name;
    isc_buffer_t b;
    const cfg_obj_t *obj;
    int type;

    result = dns_tkeyctx_create(mctx, ectx, &tctx);
    if (result != ISC_R_SUCCESS)
        return (result);

    obj = NULL;
    result = cfg_map_get(options, "tkey-dhkey", &obj);
    if (result == ISC_R_SUCCESS) {
        s = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
        n = cfg_obj_asuint32(cfg_tuple_get(obj, "keyid"));
        isc_buffer_constinit(&b, s, strlen(s));
        isc_buffer_add(&b, strlen(s));
        dns_fixedname_init(&fname);
        name = dns_fixedname_name(&fname);
        RETERR(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
        type = DST_TYPE_PUBLIC|DST_TYPE_PRIVATE|DST_TYPE_KEY;
        RETERR(dst_key_fromfile(name, (dns_keytag_t) n, DNS_KEYALG_DH,
                    type, NULL, mctx, &tctx->dhkey));
    }

    obj = NULL;
    result = cfg_map_get(options, "tkey-domain", &obj);
    if (result == ISC_R_SUCCESS) {
        s = cfg_obj_asstring(obj);
        isc_buffer_constinit(&b, s, strlen(s));
        isc_buffer_add(&b, strlen(s));
        dns_fixedname_init(&fname);
        name = dns_fixedname_name(&fname);
        RETERR(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
        tctx->domain = isc_mem_get(mctx, sizeof(dns_name_t));
        if (tctx->domain == NULL) {
            result = ISC_R_NOMEMORY;
            goto failure;
        }
        dns_name_init(tctx->domain, NULL);
        RETERR(dns_name_dup(name, mctx, tctx->domain));
    }

    obj = NULL;
    result = cfg_map_get(options, "tkey-gssapi-credential", &obj);
    if (result == ISC_R_SUCCESS) {
        s = cfg_obj_asstring(obj);

        isc_buffer_constinit(&b, s, strlen(s));
        isc_buffer_add(&b, strlen(s));
        dns_fixedname_init(&fname);
        name = dns_fixedname_name(&fname);
        RETERR(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
        RETERR(dst_gssapi_acquirecred(name, ISC_FALSE, &tctx->gsscred));
    }

    obj = NULL;
    result = cfg_map_get(options, "tkey-gssapi-keytab", &obj);
    if (result == ISC_R_SUCCESS) {
        s = cfg_obj_asstring(obj);
        tctx->gssapi_keytab = isc_mem_strdup(mctx, s);
        if (tctx->gssapi_keytab == NULL) {
            result = ISC_R_NOMEMORY;
            goto failure;
        }
    }

    *tctxp = tctx;
    return (ISC_R_SUCCESS);

 failure:
    dns_tkeyctx_destroy(&tctx);
    return (result);
}