diff options
Diffstat (limited to 'lib/dns/rdata/generic/ds_43.c')
| -rw-r--r-- | lib/dns/rdata/generic/ds_43.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/ds_43.c b/lib/dns/rdata/generic/ds_43.c new file mode 100644 index 0000000..08e5d5f --- /dev/null +++ b/lib/dns/rdata/generic/ds_43.c @@ -0,0 +1,321 @@ +/* + * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2002 Internet Software Consortium. + * + * 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: ds_43.c,v 1.12 2007/06/18 23:47:43 tbox Exp $ */ + +/* draft-ietf-dnsext-delegation-signer-05.txt */ + +#ifndef RDATA_GENERIC_DS_43_C +#define RDATA_GENERIC_DS_43_C + +#define RRTYPE_DS_ATTRIBUTES \ + (DNS_RDATATYPEATTR_DNSSEC|DNS_RDATATYPEATTR_ATPARENT) + +#include <isc/sha1.h> +#include <isc/sha2.h> + +#include <dns/ds.h> + +static inline isc_result_t +fromtext_ds(ARGS_FROMTEXT) { + isc_token_t token; + unsigned char c; + int length; + + REQUIRE(type == 43); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(origin); + UNUSED(options); + UNUSED(callbacks); + + /* + * Key tag. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, + ISC_FALSE)); + if (token.value.as_ulong > 0xffffU) + RETTOK(ISC_R_RANGE); + RETERR(uint16_tobuffer(token.value.as_ulong, target)); + + /* + * Algorithm. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, + ISC_FALSE)); + RETTOK(dns_secalg_fromtext(&c, &token.value.as_textregion)); + RETERR(mem_tobuffer(target, &c, 1)); + + /* + * Digest type. + */ + 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)); + c = (unsigned char) token.value.as_ulong; + + /* + * Digest. + */ + if (c == DNS_DSDIGEST_SHA1) + length = ISC_SHA1_DIGESTLENGTH; + else if (c == DNS_DSDIGEST_SHA256) + length = ISC_SHA256_DIGESTLENGTH; + else + length = -1; + return (isc_hex_tobuffer(lexer, target, length)); +} + +static inline isc_result_t +totext_ds(ARGS_TOTEXT) { + isc_region_t sr; + char buf[sizeof("64000 ")]; + unsigned int n; + + REQUIRE(rdata->type == 43); + REQUIRE(rdata->length != 0); + + UNUSED(tctx); + + dns_rdata_toregion(rdata, &sr); + + /* + * Key tag. + */ + n = uint16_fromregion(&sr); + isc_region_consume(&sr, 2); + sprintf(buf, "%u ", n); + RETERR(str_totext(buf, target)); + + /* + * Algorithm. + */ + n = uint8_fromregion(&sr); + isc_region_consume(&sr, 1); + sprintf(buf, "%u ", n); + RETERR(str_totext(buf, target)); + + /* + * Digest type. + */ + n = uint8_fromregion(&sr); + isc_region_consume(&sr, 1); + sprintf(buf, "%u", n); + RETERR(str_totext(buf, target)); + + /* + * Digest. + */ + if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) + RETERR(str_totext(" (", target)); + RETERR(str_totext(tctx->linebreak, target)); + RETERR(isc_hex_totext(&sr, tctx->width - 2, tctx->linebreak, target)); + if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) + RETERR(str_totext(" )", target)); + return (ISC_R_SUCCESS); +} + +static inline isc_result_t +fromwire_ds(ARGS_FROMWIRE) { + isc_region_t sr; + + REQUIRE(type == 43); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(dctx); + UNUSED(options); + + isc_buffer_activeregion(source, &sr); + + /* + * Check digest lengths if we know them. + */ + if (sr.length < 4 || + (sr.base[3] == DNS_DSDIGEST_SHA1 && + sr.length < 4 + ISC_SHA1_DIGESTLENGTH) || + (sr.base[3] == DNS_DSDIGEST_SHA256 && + sr.length < 4 + ISC_SHA256_DIGESTLENGTH)) + return (ISC_R_UNEXPECTEDEND); + + /* + * Only copy digest lengths if we know them. + * If there is extra data dns_rdata_fromwire() will + * detect that. + */ + if (sr.base[3] == DNS_DSDIGEST_SHA1) + sr.length = 4 + ISC_SHA1_DIGESTLENGTH; + else if (sr.base[3] == DNS_DSDIGEST_SHA256) + sr.length = 4 + ISC_SHA256_DIGESTLENGTH; + + isc_buffer_forward(source, sr.length); + return (mem_tobuffer(target, sr.base, sr.length)); +} + +static inline isc_result_t +towire_ds(ARGS_TOWIRE) { + isc_region_t sr; + + REQUIRE(rdata->type == 43); + REQUIRE(rdata->length != 0); + + UNUSED(cctx); + + dns_rdata_toregion(rdata, &sr); + return (mem_tobuffer(target, sr.base, sr.length)); +} + +static inline int +compare_ds(ARGS_COMPARE) { + isc_region_t r1; + isc_region_t r2; + + REQUIRE(rdata1->type == rdata2->type); + REQUIRE(rdata1->rdclass == rdata2->rdclass); + REQUIRE(rdata1->type == 43); + REQUIRE(rdata1->length != 0); + REQUIRE(rdata2->length != 0); + + dns_rdata_toregion(rdata1, &r1); + dns_rdata_toregion(rdata2, &r2); + return (isc_region_compare(&r1, &r2)); +} + +static inline isc_result_t +fromstruct_ds(ARGS_FROMSTRUCT) { + dns_rdata_ds_t *ds = source; + + REQUIRE(type == 43); + REQUIRE(source != NULL); + REQUIRE(ds->common.rdtype == type); + REQUIRE(ds->common.rdclass == rdclass); + switch (ds->digest_type) { + case DNS_DSDIGEST_SHA1: + REQUIRE(ds->length == ISC_SHA1_DIGESTLENGTH); + break; + case DNS_DSDIGEST_SHA256: + REQUIRE(ds->length == ISC_SHA256_DIGESTLENGTH); + break; + } + + UNUSED(type); + UNUSED(rdclass); + + RETERR(uint16_tobuffer(ds->key_tag, target)); + RETERR(uint8_tobuffer(ds->algorithm, target)); + RETERR(uint8_tobuffer(ds->digest_type, target)); + + return (mem_tobuffer(target, ds->digest, ds->length)); +} + +static inline isc_result_t +tostruct_ds(ARGS_TOSTRUCT) { + dns_rdata_ds_t *ds = target; + isc_region_t region; + + REQUIRE(rdata->type == 43); + REQUIRE(target != NULL); + REQUIRE(rdata->length != 0); + + ds->common.rdclass = rdata->rdclass; + ds->common.rdtype = rdata->type; + ISC_LINK_INIT(&ds->common, link); + + dns_rdata_toregion(rdata, ®ion); + + ds->key_tag = uint16_fromregion(®ion); + isc_region_consume(®ion, 2); + ds->algorithm = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + ds->digest_type = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + ds->length = region.length; + + ds->digest = mem_maybedup(mctx, region.base, region.length); + if (ds->digest == NULL) + return (ISC_R_NOMEMORY); + + ds->mctx = mctx; + return (ISC_R_SUCCESS); +} + +static inline void +freestruct_ds(ARGS_FREESTRUCT) { + dns_rdata_ds_t *ds = source; + + REQUIRE(ds != NULL); + REQUIRE(ds->common.rdtype == 43); + + if (ds->mctx == NULL) + return; + + if (ds->digest != NULL) + isc_mem_free(ds->mctx, ds->digest); + ds->mctx = NULL; +} + +static inline isc_result_t +additionaldata_ds(ARGS_ADDLDATA) { + REQUIRE(rdata->type == 43); + + UNUSED(rdata); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static inline isc_result_t +digest_ds(ARGS_DIGEST) { + isc_region_t r; + + REQUIRE(rdata->type == 43); + + dns_rdata_toregion(rdata, &r); + + return ((digest)(arg, &r)); +} + +static inline isc_boolean_t +checkowner_ds(ARGS_CHECKOWNER) { + + REQUIRE(type == 43); + + UNUSED(name); + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (ISC_TRUE); +} + +static inline isc_boolean_t +checknames_ds(ARGS_CHECKNAMES) { + + REQUIRE(rdata->type == 43); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (ISC_TRUE); +} + +#endif /* RDATA_GENERIC_DS_43_C */ |