84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
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/*
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* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2002, 2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: ds.c,v 1.4.2.1 2004/03/08 02:07:53 marka Exp $ */
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#include <config.h>
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#include <string.h>
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#include <isc/buffer.h>
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#include <isc/region.h>
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#include <isc/sha1.h>
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#include <isc/util.h>
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#include <dns/ds.h>
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#include <dns/fixedname.h>
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#include <dns/name.h>
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#include <dns/rdata.h>
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#include <dns/rdatastruct.h>
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#include <dns/result.h>
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#include <dst/dst.h>
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isc_result_t
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dns_ds_buildrdata(dns_name_t *owner, dns_rdata_t *key,
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unsigned int digest_type, unsigned char *buffer,
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dns_rdata_t *rdata)
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{
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isc_sha1_t sha1;
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dns_fixedname_t fname;
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dns_name_t *name;
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unsigned char digest[ISC_SHA1_DIGESTLENGTH];
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isc_region_t r;
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isc_buffer_t b;
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dns_rdata_ds_t ds;
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REQUIRE(key != NULL);
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REQUIRE(key->type == dns_rdatatype_dnskey);
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if (digest_type != DNS_DSDIGEST_SHA1)
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return (ISC_R_NOTIMPLEMENTED);
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dns_fixedname_init(&fname);
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name = dns_fixedname_name(&fname);
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(void)dns_name_downcase(owner, name, NULL);
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memset(buffer, 0, DNS_DS_BUFFERSIZE);
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isc_buffer_init(&b, buffer, DNS_DS_BUFFERSIZE);
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isc_sha1_init(&sha1);
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dns_name_toregion(name, &r);
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isc_sha1_update(&sha1, r.base, r.length);
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dns_rdata_toregion(key, &r);
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INSIST(r.length >= 4);
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isc_sha1_update(&sha1, r.base, r.length);
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isc_sha1_final(&sha1, digest);
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ds.mctx = NULL;
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ds.common.rdclass = key->rdclass;
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ds.common.rdtype = dns_rdatatype_ds;
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ds.algorithm = r.base[3];
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ds.key_tag = dst_region_computeid(&r, ds.algorithm);
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ds.digest_type = DNS_DSDIGEST_SHA1;
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ds.length = ISC_SHA1_DIGESTLENGTH;
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ds.digest = digest;
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return (dns_rdata_fromstruct(rdata, key->rdclass, dns_rdatatype_ds,
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&ds, &b));
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}
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