hip_55.c revision c3c8823fed039b3a2b8e5ca8bc2f3301d1dd840e
/*
* Copyright (C) 2009, 2011 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: hip_55.c,v 1.8 2011/01/13 04:59:26 tbox Exp $ */
/* reviewed: TBC */
/* RFC 5205 */
#ifndef RDATA_GENERIC_HIP_5_C
#define RDATA_GENERIC_HIP_5_C
#define RRTYPE_HIP_ATTRIBUTES (0)
static inline isc_result_t
fromtext_hip(ARGS_FROMTEXT) {
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
isc_buffer_t hit_len;
isc_buffer_t key_len;
unsigned char *start;
size_t len;
REQUIRE(type == 55);
UNUSED(type);
UNUSED(rdclass);
UNUSED(callbacks);
/*
* Dummy HIT len.
*/
hit_len = *target;
RETERR(uint8_tobuffer(0, target));
/*
* Algorithm.
*/
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE));
if (token.value.as_ulong > 0xffU)
RETTOK(ISC_R_RANGE);
RETERR(uint8_tobuffer(token.value.as_ulong, target));
/*
* Dummy KEY len.
*/
key_len = *target;
RETERR(uint16_tobuffer(0, target));
/*
* HIT (base16).
*/
start = isc_buffer_used(target);
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
RETTOK(isc_hex_decodestring(DNS_AS_STR(token), target));
/*
* Fill in HIT len.
*/
len = (unsigned char *)isc_buffer_used(target) - start;
if (len > 0xffU)
RETTOK(ISC_R_RANGE);
RETERR(uint8_tobuffer((isc_uint32_t)len, &hit_len));
/*
* Public key (base64).
*/
start = isc_buffer_used(target);
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
RETTOK(isc_base64_decodestring(DNS_AS_STR(token), target));
/*
* Fill in KEY len.
*/
len = (unsigned char *)isc_buffer_used(target) - start;
if (len > 0xffffU)
RETTOK(ISC_R_RANGE);
RETERR(uint16_tobuffer((isc_uint32_t)len, &key_len));
/*
* Rendezvous Servers.
*/
dns_name_init(&name, NULL);
do {
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string,
ISC_TRUE));
if (token.type != isc_tokentype_string)
break;
buffer_fromregion(&buffer, &token.value.as_region);
origin = (origin != NULL) ? origin : dns_rootname;
RETTOK(dns_name_fromtext(&name, &buffer, origin, options,
target));
} while (1);
/*
* Let upper layer handle eol/eof.
*/
isc_lex_ungettoken(lexer, &token);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
totext_hip(ARGS_TOTEXT) {
isc_region_t region;
dns_name_t name;
unsigned int length, key_len, hit_len;
unsigned char algorithm;
char buf[sizeof("225 ")];
REQUIRE(rdata->type == 55);
REQUIRE(rdata->length != 0);
dns_rdata_toregion(rdata, &region);
hit_len = uint8_fromregion(&region);
isc_region_consume(&region, 1);
algorithm = uint8_fromregion(&region);
isc_region_consume(&region, 1);
key_len = uint16_fromregion(&region);
isc_region_consume(&region, 2);
if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
RETERR(str_totext("( ", target));
/*
* Algorithm
*/
sprintf(buf, "%u ", algorithm);
RETERR(str_totext(buf, target));
/*
* HIT.
*/
INSIST(hit_len < region.length);
length = region.length;
region.length = hit_len;
RETERR(isc_hex_totext(&region, 1, "", target));
region.length = length - hit_len;
RETERR(str_totext(tctx->linebreak, target));
/*
* Public KEY.
*/
INSIST(key_len <= region.length);
length = region.length;
region.length = key_len;
RETERR(isc_base64_totext(&region, 1, "", target));
region.length = length - key_len;
RETERR(str_totext(tctx->linebreak, target));
/*
* Rendezvous Servers.
*/
dns_name_init(&name, NULL);
while (region.length > 0) {
dns_name_fromregion(&name, &region);
RETERR(dns_name_totext(&name, ISC_FALSE, target));
isc_region_consume(&region, name.length);
if (region.length > 0)
RETERR(str_totext(tctx->linebreak, target));
}
if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
RETERR(str_totext(" )", target));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_hip(ARGS_FROMWIRE) {
isc_region_t region, rr;
dns_name_t name;
isc_uint8_t hit_len;
isc_uint16_t key_len;
REQUIRE(type == 55);
UNUSED(type);
UNUSED(rdclass);
isc_buffer_activeregion(source, &region);
if (region.length < 4U)
RETERR(DNS_R_FORMERR);
rr = region;
hit_len = uint8_fromregion(&region);
if (hit_len == 0)
RETERR(DNS_R_FORMERR);
isc_region_consume(&region, 2); /* hit length + algorithm */
key_len = uint16_fromregion(&region);
if (key_len == 0)
RETERR(DNS_R_FORMERR);
isc_region_consume(&region, 2);
if (region.length < (unsigned) (hit_len + key_len))
RETERR(DNS_R_FORMERR);
RETERR(mem_tobuffer(target, rr.base, 4 + hit_len + key_len));
isc_buffer_forward(source, 4 + hit_len + key_len);
dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
while (isc_buffer_activelength(source) > 0) {
dns_name_init(&name, NULL);
RETERR(dns_name_fromwire(&name, source, dctx, options, target));
}
return (ISC_R_SUCCESS);
}
static inline isc_result_t
towire_hip(ARGS_TOWIRE) {
isc_region_t region;
REQUIRE(rdata->type == 55);
REQUIRE(rdata->length != 0);
UNUSED(cctx);
dns_rdata_toregion(rdata, &region);
return (mem_tobuffer(target, region.base, region.length));
}
static inline int
compare_hip(ARGS_COMPARE) {
isc_region_t region1;
isc_region_t region2;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == 55);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_rdata_toregion(rdata1, &region1);
dns_rdata_toregion(rdata2, &region2);
return (isc_region_compare(&region1, &region2));
}
static inline isc_result_t
fromstruct_hip(ARGS_FROMSTRUCT) {
dns_rdata_hip_t *hip = source;
dns_rdata_hip_t myhip;
isc_result_t result;
REQUIRE(type == 55);
REQUIRE(source != NULL);
REQUIRE(hip->common.rdtype == type);
REQUIRE(hip->common.rdclass == rdclass);
REQUIRE(hip->hit_len > 0 && hip->hit != NULL);
REQUIRE(hip->key_len > 0 && hip->key != NULL);
REQUIRE((hip->servers == NULL && hip->servers_len == 0) ||
(hip->servers != NULL && hip->servers_len != 0));
UNUSED(type);
UNUSED(rdclass);
RETERR(uint8_tobuffer(hip->hit_len, target));
RETERR(uint8_tobuffer(hip->algorithm, target));
RETERR(uint16_tobuffer(hip->key_len, target));
RETERR(mem_tobuffer(target, hip->hit, hip->hit_len));
RETERR(mem_tobuffer(target, hip->key, hip->key_len));
myhip = *hip;
for (result = dns_rdata_hip_first(&myhip);
result == ISC_R_SUCCESS;
result = dns_rdata_hip_next(&myhip))
/* empty */;
return(mem_tobuffer(target, hip->servers, hip->servers_len));
}
static inline isc_result_t
tostruct_hip(ARGS_TOSTRUCT) {
isc_region_t region;
dns_rdata_hip_t *hip = target;
REQUIRE(rdata->type == 55);
REQUIRE(target != NULL);
REQUIRE(rdata->length != 0);
hip->common.rdclass = rdata->rdclass;
hip->common.rdtype = rdata->type;
ISC_LINK_INIT(&hip->common, link);
dns_rdata_toregion(rdata, &region);
hip->hit_len = uint8_fromregion(&region);
isc_region_consume(&region, 1);
hip->algorithm = uint8_fromregion(&region);
isc_region_consume(&region, 1);
hip->key_len = uint16_fromregion(&region);
isc_region_consume(&region, 2);
hip->hit = hip->key = hip->servers = NULL;
hip->hit = mem_maybedup(mctx, region.base, hip->hit_len);
if (hip->hit == NULL)
goto cleanup;
isc_region_consume(&region, hip->hit_len);
hip->key = mem_maybedup(mctx, region.base, hip->key_len);
if (hip->key == NULL)
goto cleanup;
isc_region_consume(&region, hip->key_len);
hip->servers_len = region.length;
if (hip->servers_len != 0) {
hip->servers = mem_maybedup(mctx, region.base, region.length);
if (hip->servers == NULL)
goto cleanup;
}
hip->offset = hip->servers_len;
hip->mctx = mctx;
return (ISC_R_SUCCESS);
cleanup:
if (hip->hit != NULL)
isc_mem_free(mctx, hip->hit);
if (hip->key != NULL)
isc_mem_free(mctx, hip->key);
if (hip->servers != NULL)
isc_mem_free(mctx, hip->servers);
return (ISC_R_NOMEMORY);
}
static inline void
freestruct_hip(ARGS_FREESTRUCT) {
dns_rdata_hip_t *hip = source;
REQUIRE(source != NULL);
if (hip->mctx == NULL)
return;
isc_mem_free(hip->mctx, hip->hit);
isc_mem_free(hip->mctx, hip->key);
if (hip->servers != NULL)
isc_mem_free(hip->mctx, hip->servers);
hip->mctx = NULL;
}
static inline isc_result_t
additionaldata_hip(ARGS_ADDLDATA) {
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
REQUIRE(rdata->type == 55);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_hip(ARGS_DIGEST) {
isc_region_t r;
REQUIRE(rdata->type == 55);
dns_rdata_toregion(rdata, &r);
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_hip(ARGS_CHECKOWNER) {
REQUIRE(type == 55);
UNUSED(name);
UNUSED(type);
UNUSED(rdclass);
UNUSED(wildcard);
return (ISC_TRUE);
}
static inline isc_boolean_t
checknames_hip(ARGS_CHECKNAMES) {
REQUIRE(rdata->type == 55);
UNUSED(rdata);
UNUSED(owner);
UNUSED(bad);
return (ISC_TRUE);
}
isc_result_t
dns_rdata_hip_first(dns_rdata_hip_t *hip) {
if (hip->servers_len == 0)
return (ISC_R_NOMORE);
hip->offset = 0;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_rdata_hip_next(dns_rdata_hip_t *hip) {
isc_region_t region;
dns_name_t name;
if (hip->offset >= hip->servers_len)
return (ISC_R_NOMORE);
region.base = hip->servers + hip->offset;
region.length = hip->servers_len - hip->offset;
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &region);
hip->offset += name.length;
INSIST(hip->offset <= hip->servers_len);
return (ISC_R_SUCCESS);
}
void
dns_rdata_hip_current(dns_rdata_hip_t *hip, dns_name_t *name) {
isc_region_t region;
REQUIRE(hip->offset < hip->servers_len);
region.base = hip->servers + hip->offset;
region.length = hip->servers_len - hip->offset;
dns_name_fromregion(name, &region);
INSIST(name->length + hip->offset <= hip->servers_len);
}
static inline int
casecompare_hip(ARGS_COMPARE) {
isc_region_t r1;
isc_region_t r2;
dns_name_t name1;
dns_name_t name2;
int order;
isc_uint8_t hit_len;
isc_uint16_t key_len;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == 55);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
INSIST(r1.length > 4);
INSIST(r2.length > 4);
r1.length = 4;
r2.length = 4;
order = isc_region_compare(&r1, &r2);
if (order != 0)
return (order);
hit_len = uint8_fromregion(&r1);
isc_region_consume(&r1, 2); /* hit length + algorithm */
key_len = uint16_fromregion(&r1);
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
isc_region_consume(&r1, 4);
isc_region_consume(&r2, 4);
INSIST(r1.length >= (unsigned) (hit_len + key_len));
INSIST(r2.length >= (unsigned) (hit_len + key_len));
order = isc_region_compare(&r1, &r2);
if (order != 0)
return (order);
isc_region_consume(&r1, hit_len + key_len);
isc_region_consume(&r2, hit_len + key_len);
dns_name_init(&name1, NULL);
dns_name_init(&name2, NULL);
while (r1.length != 0 && r2.length != 0) {
dns_name_fromregion(&name1, &r1);
dns_name_fromregion(&name2, &r2);
order = dns_name_rdatacompare(&name1, &name2);
if (order != 0)
return (order);
isc_region_consume(&r1, name_length(&name1));
isc_region_consume(&r2, name_length(&name2));
}
return (isc_region_compare(&r1, &r2));
}
#endif /* RDATA_GENERIC_HIP_5_C */