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/*
* Copyright (C) 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/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <string.h>
#include <isc/buffer.h>
#include <isc/region.h>
#include <isc/sha1.h>
#include <isc/sha2.h>
#include <isc/util.h>
#include <dns/ds.h>
#include <dns/fixedname.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdatastruct.h>
#include <dns/result.h>
#include <dst/dst.h>
#if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
#include "dst_gost.h"
#endif
isc_result_t
dns_ds_buildrdata(dns_name_t *owner, dns_rdata_t *key,
unsigned int digest_type, unsigned char *buffer,
dns_rdata_t *rdata)
{
dns_fixedname_t fname;
dns_name_t *name;
unsigned char digest[ISC_SHA384_DIGESTLENGTH];
isc_region_t r;
isc_buffer_t b;
dns_rdata_ds_t ds;
isc_sha1_t sha1;
isc_sha256_t sha256;
isc_sha384_t sha384;
#if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
isc_gost_t gost;
#endif
REQUIRE(key != NULL);
REQUIRE(key->type == dns_rdatatype_dnskey);
if (!dst_ds_digest_supported(digest_type))
return (ISC_R_NOTIMPLEMENTED);
name = dns_fixedname_initname(&fname);
(void)dns_name_downcase(owner, name, NULL);
memset(buffer, 0, DNS_DS_BUFFERSIZE);
isc_buffer_init(&b, buffer, DNS_DS_BUFFERSIZE);
switch (digest_type) {
case DNS_DSDIGEST_SHA1:
isc_sha1_init(&sha1);
dns_name_toregion(name, &r);
isc_sha1_update(&sha1, r.base, r.length);
dns_rdata_toregion(key, &r);
INSIST(r.length >= 4);
isc_sha1_update(&sha1, r.base, r.length);
isc_sha1_final(&sha1, digest);
break;
#if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
#define RETERR(x) do { \
isc_result_t ret = (x); \
if (ret != ISC_R_SUCCESS) { \
isc_gost_invalidate(&gost); \
return (ret); \
} \
} while (0)
case DNS_DSDIGEST_GOST:
RETERR(isc_gost_init(&gost));
dns_name_toregion(name, &r);
RETERR(isc_gost_update(&gost, r.base, r.length));
dns_rdata_toregion(key, &r);
INSIST(r.length >= 4);
RETERR(isc_gost_update(&gost, r.base, r.length));
RETERR(isc_gost_final(&gost, digest));
break;
#endif
case DNS_DSDIGEST_SHA384:
isc_sha384_init(&sha384);
dns_name_toregion(name, &r);
isc_sha384_update(&sha384, r.base, r.length);
dns_rdata_toregion(key, &r);
INSIST(r.length >= 4);
isc_sha384_update(&sha384, r.base, r.length);
isc_sha384_final(digest, &sha384);
break;
case DNS_DSDIGEST_SHA256:
default:
isc_sha256_init(&sha256);
dns_name_toregion(name, &r);
isc_sha256_update(&sha256, r.base, r.length);
dns_rdata_toregion(key, &r);
INSIST(r.length >= 4);
isc_sha256_update(&sha256, r.base, r.length);
isc_sha256_final(digest, &sha256);
break;
}
ds.mctx = NULL;
ds.common.rdclass = key->rdclass;
ds.common.rdtype = dns_rdatatype_ds;
ds.algorithm = r.base[3];
ds.key_tag = dst_region_computeid(&r, ds.algorithm);
ds.digest_type = digest_type;
switch (digest_type) {
case DNS_DSDIGEST_SHA1:
ds.length = ISC_SHA1_DIGESTLENGTH;
break;
#if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
case DNS_DSDIGEST_GOST:
ds.length = ISC_GOST_DIGESTLENGTH;
break;
#endif
case DNS_DSDIGEST_SHA384:
ds.length = ISC_SHA384_DIGESTLENGTH;
break;
case DNS_DSDIGEST_SHA256:
default:
ds.length = ISC_SHA256_DIGESTLENGTH;
break;
}
ds.digest = digest;
return (dns_rdata_fromstruct(rdata, key->rdclass, dns_rdatatype_ds,
&ds, &b));
}
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