/contrib/bind9/lib/dns/rdata/generic/ds_43.c

  1/*
  2 * Copyright (C) 2004, 2005, 2007, 2009, 2010, 2012  Internet Systems Consortium, Inc. ("ISC")
  3 * Copyright (C) 2002  Internet Software Consortium.
  4 *
  5 * Permission to use, copy, modify, and/or distribute this software for any
  6 * purpose with or without fee is hereby granted, provided that the above
  7 * copyright notice and this permission notice appear in all copies.
  8 *
  9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 15 * PERFORMANCE OF THIS SOFTWARE.
 16 */
 17
 18/* $Id$ */
 19
 20/* draft-ietf-dnsext-delegation-signer-05.txt */
 21
 22#ifndef RDATA_GENERIC_DS_43_C
 23#define RDATA_GENERIC_DS_43_C
 24
 25#define RRTYPE_DS_ATTRIBUTES \
 26	(DNS_RDATATYPEATTR_DNSSEC|DNS_RDATATYPEATTR_ATPARENT)
 27
 28#include <isc/sha1.h>
 29#include <isc/sha2.h>
 30
 31#include <dns/ds.h>
 32
 33static inline isc_result_t
 34fromtext_ds(ARGS_FROMTEXT) {
 35	isc_token_t token;
 36	unsigned char c;
 37	int length;
 38
 39	REQUIRE(type == 43);
 40
 41	UNUSED(type);
 42	UNUSED(rdclass);
 43	UNUSED(origin);
 44	UNUSED(options);
 45	UNUSED(callbacks);
 46
 47	/*
 48	 * Key tag.
 49	 */
 50	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
 51				      ISC_FALSE));
 52	if (token.value.as_ulong > 0xffffU)
 53		RETTOK(ISC_R_RANGE);
 54	RETERR(uint16_tobuffer(token.value.as_ulong, target));
 55
 56	/*
 57	 * Algorithm.
 58	 */
 59	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
 60				      ISC_FALSE));
 61	RETTOK(dns_secalg_fromtext(&c, &token.value.as_textregion));
 62	RETERR(mem_tobuffer(target, &c, 1));
 63
 64	/*
 65	 * Digest type.
 66	 */
 67	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
 68				      ISC_FALSE));
 69	if (token.value.as_ulong > 0xffU)
 70		RETTOK(ISC_R_RANGE);
 71	RETERR(uint8_tobuffer(token.value.as_ulong, target));
 72	c = (unsigned char) token.value.as_ulong;
 73
 74	/*
 75	 * Digest.
 76	 */
 77	switch (c) {
 78	case DNS_DSDIGEST_SHA1:
 79		length = ISC_SHA1_DIGESTLENGTH;
 80		break;
 81	case DNS_DSDIGEST_SHA256:
 82		length = ISC_SHA256_DIGESTLENGTH;
 83		break;
 84	case DNS_DSDIGEST_GOST:
 85		length = ISC_GOST_DIGESTLENGTH;
 86		break;
 87	default:
 88		length = -1;
 89		break;
 90	}
 91	return (isc_hex_tobuffer(lexer, target, length));
 92}
 93
 94static inline isc_result_t
 95totext_ds(ARGS_TOTEXT) {
 96	isc_region_t sr;
 97	char buf[sizeof("64000 ")];
 98	unsigned int n;
 99
100	REQUIRE(rdata->type == 43);
101	REQUIRE(rdata->length != 0);
102
103	UNUSED(tctx);
104
105	dns_rdata_toregion(rdata, &sr);
106
107	/*
108	 * Key tag.
109	 */
110	n = uint16_fromregion(&sr);
111	isc_region_consume(&sr, 2);
112	sprintf(buf, "%u ", n);
113	RETERR(str_totext(buf, target));
114
115	/*
116	 * Algorithm.
117	 */
118	n = uint8_fromregion(&sr);
119	isc_region_consume(&sr, 1);
120	sprintf(buf, "%u ", n);
121	RETERR(str_totext(buf, target));
122
123	/*
124	 * Digest type.
125	 */
126	n = uint8_fromregion(&sr);
127	isc_region_consume(&sr, 1);
128	sprintf(buf, "%u", n);
129	RETERR(str_totext(buf, target));
130
131	/*
132	 * Digest.
133	 */
134	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
135		RETERR(str_totext(" (", target));
136	RETERR(str_totext(tctx->linebreak, target));
137	RETERR(isc_hex_totext(&sr, tctx->width - 2, tctx->linebreak, target));
138	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
139		RETERR(str_totext(" )", target));
140	return (ISC_R_SUCCESS);
141}
142
143static inline isc_result_t
144fromwire_ds(ARGS_FROMWIRE) {
145	isc_region_t sr;
146
147	REQUIRE(type == 43);
148
149	UNUSED(type);
150	UNUSED(rdclass);
151	UNUSED(dctx);
152	UNUSED(options);
153
154	isc_buffer_activeregion(source, &sr);
155
156	/*
157	 * Check digest lengths if we know them.
158	 */
159	if (sr.length < 4 ||
160	    (sr.base[3] == DNS_DSDIGEST_SHA1 &&
161	     sr.length < 4 + ISC_SHA1_DIGESTLENGTH) ||
162	    (sr.base[3] == DNS_DSDIGEST_SHA256 &&
163	     sr.length < 4 + ISC_SHA256_DIGESTLENGTH) ||
164	    (sr.base[3] == DNS_DSDIGEST_GOST &&
165	     sr.length < 4 + ISC_GOST_DIGESTLENGTH))
166		return (ISC_R_UNEXPECTEDEND);
167
168	/*
169	 * Only copy digest lengths if we know them.
170	 * If there is extra data dns_rdata_fromwire() will
171	 * detect that.
172	 */
173	if (sr.base[3] == DNS_DSDIGEST_SHA1)
174		sr.length = 4 + ISC_SHA1_DIGESTLENGTH;
175	else if (sr.base[3] == DNS_DSDIGEST_SHA256)
176		sr.length = 4 + ISC_SHA256_DIGESTLENGTH;
177	else if (sr.base[3] == DNS_DSDIGEST_GOST)
178		sr.length = 4 + ISC_GOST_DIGESTLENGTH;
179
180	isc_buffer_forward(source, sr.length);
181	return (mem_tobuffer(target, sr.base, sr.length));
182}
183
184static inline isc_result_t
185towire_ds(ARGS_TOWIRE) {
186	isc_region_t sr;
187
188	REQUIRE(rdata->type == 43);
189	REQUIRE(rdata->length != 0);
190
191	UNUSED(cctx);
192
193	dns_rdata_toregion(rdata, &sr);
194	return (mem_tobuffer(target, sr.base, sr.length));
195}
196
197static inline int
198compare_ds(ARGS_COMPARE) {
199	isc_region_t r1;
200	isc_region_t r2;
201
202	REQUIRE(rdata1->type == rdata2->type);
203	REQUIRE(rdata1->rdclass == rdata2->rdclass);
204	REQUIRE(rdata1->type == 43);
205	REQUIRE(rdata1->length != 0);
206	REQUIRE(rdata2->length != 0);
207
208	dns_rdata_toregion(rdata1, &r1);
209	dns_rdata_toregion(rdata2, &r2);
210	return (isc_region_compare(&r1, &r2));
211}
212
213static inline isc_result_t
214fromstruct_ds(ARGS_FROMSTRUCT) {
215	dns_rdata_ds_t *ds = source;
216
217	REQUIRE(type == 43);
218	REQUIRE(source != NULL);
219	REQUIRE(ds->common.rdtype == type);
220	REQUIRE(ds->common.rdclass == rdclass);
221	switch (ds->digest_type) {
222	case DNS_DSDIGEST_SHA1:
223		REQUIRE(ds->length == ISC_SHA1_DIGESTLENGTH);
224		break;
225	case DNS_DSDIGEST_SHA256:
226		REQUIRE(ds->length == ISC_SHA256_DIGESTLENGTH);
227		break;
228	case DNS_DSDIGEST_GOST:
229		REQUIRE(ds->length == ISC_GOST_DIGESTLENGTH);
230		break;
231	}
232
233	UNUSED(type);
234	UNUSED(rdclass);
235
236	RETERR(uint16_tobuffer(ds->key_tag, target));
237	RETERR(uint8_tobuffer(ds->algorithm, target));
238	RETERR(uint8_tobuffer(ds->digest_type, target));
239
240	return (mem_tobuffer(target, ds->digest, ds->length));
241}
242
243static inline isc_result_t
244tostruct_ds(ARGS_TOSTRUCT) {
245	dns_rdata_ds_t *ds = target;
246	isc_region_t region;
247
248	REQUIRE(rdata->type == 43);
249	REQUIRE(target != NULL);
250	REQUIRE(rdata->length != 0);
251
252	ds->common.rdclass = rdata->rdclass;
253	ds->common.rdtype = rdata->type;
254	ISC_LINK_INIT(&ds->common, link);
255
256	dns_rdata_toregion(rdata, &region);
257
258	ds->key_tag = uint16_fromregion(&region);
259	isc_region_consume(&region, 2);
260	ds->algorithm = uint8_fromregion(&region);
261	isc_region_consume(&region, 1);
262	ds->digest_type = uint8_fromregion(&region);
263	isc_region_consume(&region, 1);
264	ds->length = region.length;
265
266	ds->digest = mem_maybedup(mctx, region.base, region.length);
267	if (ds->digest == NULL)
268		return (ISC_R_NOMEMORY);
269
270	ds->mctx = mctx;
271	return (ISC_R_SUCCESS);
272}
273
274static inline void
275freestruct_ds(ARGS_FREESTRUCT) {
276	dns_rdata_ds_t *ds = source;
277
278	REQUIRE(ds != NULL);
279	REQUIRE(ds->common.rdtype == 43);
280
281	if (ds->mctx == NULL)
282		return;
283
284	if (ds->digest != NULL)
285		isc_mem_free(ds->mctx, ds->digest);
286	ds->mctx = NULL;
287}
288
289static inline isc_result_t
290additionaldata_ds(ARGS_ADDLDATA) {
291	REQUIRE(rdata->type == 43);
292
293	UNUSED(rdata);
294	UNUSED(add);
295	UNUSED(arg);
296
297	return (ISC_R_SUCCESS);
298}
299
300static inline isc_result_t
301digest_ds(ARGS_DIGEST) {
302	isc_region_t r;
303
304	REQUIRE(rdata->type == 43);
305
306	dns_rdata_toregion(rdata, &r);
307
308	return ((digest)(arg, &r));
309}
310
311static inline isc_boolean_t
312checkowner_ds(ARGS_CHECKOWNER) {
313
314	REQUIRE(type == 43);
315
316	UNUSED(name);
317	UNUSED(type);
318	UNUSED(rdclass);
319	UNUSED(wildcard);
320
321	return (ISC_TRUE);
322}
323
324static inline isc_boolean_t
325checknames_ds(ARGS_CHECKNAMES) {
326
327	REQUIRE(rdata->type == 43);
328
329	UNUSED(rdata);
330	UNUSED(owner);
331	UNUSED(bad);
332
333	return (ISC_TRUE);
334}
335
336static inline int
337casecompare_ds(ARGS_COMPARE) {
338	return (compare_ds(rdata1, rdata2));
339}
340
341#endif	/* RDATA_GENERIC_DS_43_C */