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-rw-r--r--lib/dns/ds.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/dns/ds.c b/lib/dns/ds.c
new file mode 100644
index 0000000..d1a507b
--- /dev/null
+++ b/lib/dns/ds.c
@@ -0,0 +1,151 @@
+/*
+ * 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));
+}