rdata/generic/dlv_32769.c

	dlv_32769.c revision 77ab862dca0158f88a107e105f868ba0f157a7e8
/*
 * Copyright (C) 2004, 2006, 2007  Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and 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: dlv_32769.c,v 1.5 2007/02/26 23:46:54 tbox Exp $ */

/* draft-ietf-dnsext-delegation-signer-05.txt */

#ifndef RDATA_GENERIC_DLV_32769_C
#define RDATA_GENERIC_DLV_32769_C

#define RRTYPE_DLV_ATTRIBUTES 0

#include <isc/sha1.h>
#include <isc/sha2.h>

#include <dns/ds.h>


static inline isc_result_t
fromtext_dlv(ARGS_FROMTEXT) {
    isc_token_t token;
    unsigned char c;
    int length;

    REQUIRE(type == 32769);

    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_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * 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, -1));
}

static inline isc_result_t
totext_dlv(ARGS_TOTEXT) {
    isc_region_t sr;
    char buf[sizeof("64000 ")];
    unsigned int n;

    REQUIRE(rdata->type == 32769);
    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_dlv(ARGS_FROMWIRE) {
    isc_region_t sr;

    REQUIRE(type == 32769);

    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_dlv(ARGS_TOWIRE) {
    isc_region_t sr;

    REQUIRE(rdata->type == 32769);
    REQUIRE(rdata->length != 0);

    UNUSED(cctx);

    dns_rdata_toregion(rdata, &sr);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline int
compare_dlv(ARGS_COMPARE) {
    isc_region_t r1;
    isc_region_t r2;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 32769);
    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_dlv(ARGS_FROMSTRUCT) {
    dns_rdata_dlv_t *dlv = source;

    REQUIRE(type == 32769);
    REQUIRE(source != NULL);
    REQUIRE(dlv->common.rdtype == type);
    REQUIRE(dlv->common.rdclass == rdclass);
    switch (dlv->digest_type) {
    case DNS_DSDIGEST_SHA1:
        REQUIRE(dlv->length == ISC_SHA1_DIGESTLENGTH);
        break;
    case DNS_DSDIGEST_SHA256:
        REQUIRE(dlv->length == ISC_SHA256_DIGESTLENGTH);
        break;
    }

    UNUSED(type);
    UNUSED(rdclass);

    RETERR(uint16_tobuffer(dlv->key_tag, target));
    RETERR(uint8_tobuffer(dlv->algorithm, target));
    RETERR(uint8_tobuffer(dlv->digest_type, target));

    return (mem_tobuffer(target, dlv->digest, dlv->length));
}

static inline isc_result_t
tostruct_dlv(ARGS_TOSTRUCT) {
    dns_rdata_dlv_t *dlv = target;
    isc_region_t region;

    REQUIRE(rdata->type == 32769);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

    dlv->common.rdclass = rdata->rdclass;
    dlv->common.rdtype = rdata->type;
    ISC_LINK_INIT(&dlv->common, link);

    dns_rdata_toregion(rdata, &region);

    dlv->key_tag = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    dlv->algorithm = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    dlv->digest_type = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    dlv->length = region.length;

    dlv->digest = mem_maybedup(mctx, region.base, region.length);
    if (dlv->digest == NULL)
        return (ISC_R_NOMEMORY);

    dlv->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_dlv(ARGS_FREESTRUCT) {
    dns_rdata_dlv_t *dlv = source;

    REQUIRE(dlv != NULL);
    REQUIRE(dlv->common.rdtype == 32769);

    if (dlv->mctx == NULL)
        return;

    if (dlv->digest != NULL)
        isc_mem_free(dlv->mctx, dlv->digest);
    dlv->mctx = NULL;
}

static inline isc_result_t
additionaldata_dlv(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == 32769);

    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_dlv(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == 32769);

    dns_rdata_toregion(rdata, &r);

    return ((digest)(arg, &r));
}

static inline isc_boolean_t
checkowner_dlv(ARGS_CHECKOWNER) {

    REQUIRE(type == 32769);

    UNUSED(name);
    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(wildcard);

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_dlv(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == 32769);

    UNUSED(rdata);
    UNUSED(owner);
    UNUSED(bad);

    return (ISC_TRUE);
}

#endif  /* RDATA_GENERIC_DLV_32769_C */