rdata/generic/key_25.c

	key_25.c revision 499b34cea04a46823d003d4c0520c8b03e8513cb
/*
 * Copyright (C) 1999-2001  Internet Software Consortium.
 *
 * 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 INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM 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: key_25.c,v 1.36 2001/01/09 21:54:06 bwelling Exp $ */

/*
 * Reviewed: Wed Mar 15 16:47:10 PST 2000 by halley.
 */

/* RFC 2535 */

#ifndef RDATA_GENERIC_KEY_25_C
#define RDATA_GENERIC_KEY_25_C

#include <dst/dst.h>

#define RRTYPE_KEY_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC)

static inline isc_result_t
fromtext_key(ARGS_FROMTEXT) {
    isc_token_t token;
    dns_secalg_t alg;
    dns_secproto_t proto;
    dns_keyflags_t flags;

    REQUIRE(type == 25);

    UNUSED(rdclass);
    UNUSED(origin);
    UNUSED(downcase);

    /* flags */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                      ISC_FALSE));
    RETERR(dns_keyflags_fromtext(&flags, &token.value.as_textregion));
    RETERR(uint16_tobuffer(flags, target));

    /* protocol */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                      ISC_FALSE));
    RETERR(dns_secproto_fromtext(&proto, &token.value.as_textregion));
    RETERR(mem_tobuffer(target, &proto, 1));

    /* algorithm */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                      ISC_FALSE));
    RETERR(dns_secalg_fromtext(&alg, &token.value.as_textregion));
    RETERR(mem_tobuffer(target, &alg, 1));

    /* No Key? */
    if ((flags & 0xc000) == 0xc000)
        return (ISC_R_SUCCESS);

    return (isc_base64_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_key(ARGS_TOTEXT) {
    isc_region_t sr;
    char buf[sizeof "64000"];
    unsigned int flags;
    unsigned char algorithm;

    REQUIRE(rdata->type == 25);
    REQUIRE(rdata->length != 0);

    dns_rdata_toregion(rdata, &sr);

    /* flags */
    flags = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    sprintf(buf, "%u", flags);
    RETERR(str_totext(buf, target));
    RETERR(str_totext(" ", target));

    /* protocol */
    sprintf(buf, "%u", sr.base[0]);
    isc_region_consume(&sr, 1);
    RETERR(str_totext(buf, target));
    RETERR(str_totext(" ", target));

    /* algorithm */
    algorithm = sr.base[0];
    sprintf(buf, "%u", algorithm);
    isc_region_consume(&sr, 1);
    RETERR(str_totext(buf, target));

    /* No Key? */
    if ((flags & 0xc000) == 0xc000)
        return (ISC_R_SUCCESS);

    /* key */
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" (", target));
    RETERR(str_totext(tctx->linebreak, target));
    RETERR(isc_base64_totext(&sr, tctx->width - 2,
                 tctx->linebreak, target));
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" )", target));

    if ((tctx->flags & DNS_STYLEFLAG_COMMENT) != 0) {
        isc_region_t tmpr;

        RETERR(str_totext(" ; key id = ", target));
        dns_rdata_toregion(rdata, &tmpr);
        sprintf(buf, "%u", dst_region_computeid(&tmpr, algorithm));
        RETERR(str_totext(buf, target));
    }
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_key(ARGS_FROMWIRE) {
    isc_region_t sr;

    UNUSED(rdclass);
    UNUSED(dctx);
    UNUSED(downcase);

    REQUIRE(type == 25);

    isc_buffer_activeregion(source, &sr);
    if (sr.length < 4)
        return (ISC_R_UNEXPECTEDEND);

    isc_buffer_forward(source, sr.length);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_key(ARGS_TOWIRE) {
    isc_region_t sr;

    REQUIRE(rdata->type == 25);
    REQUIRE(rdata->length != 0);

    UNUSED(cctx);

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

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

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 25);
    REQUIRE(rdata1->length != 0);
    REQUIRE(rdata2->length != 0);

    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    return (compare_region(&r1, &r2));
}

static inline isc_result_t
fromstruct_key(ARGS_FROMSTRUCT) {
    dns_rdata_key_t *key = source;

    REQUIRE(type == 25);
    REQUIRE(source != NULL);
    REQUIRE(key->common.rdtype == type);
    REQUIRE(key->common.rdclass == rdclass);

    UNUSED(rdclass);

    /* Flags */
    RETERR(uint16_tobuffer(key->flags, target));

    /* Protocol */
    RETERR(uint8_tobuffer(key->protocol, target));

    /* Algorithm */
    RETERR(uint8_tobuffer(key->algorithm, target));

    /* Data */
    return (mem_tobuffer(target, key->data, key->datalen));
}

static inline isc_result_t
tostruct_key(ARGS_TOSTRUCT) {
    dns_rdata_key_t *key = target;
    isc_region_t sr;

    REQUIRE(rdata->type == 25);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

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

    dns_rdata_toregion(rdata, &sr);

    /* Flags */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    key->flags = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Protocol */
    if (sr.length < 1)
        return (ISC_R_UNEXPECTEDEND);
    key->protocol = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);

    /* Algorithm */
    if (sr.length < 1)
        return (ISC_R_UNEXPECTEDEND);
    key->algorithm = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);

    /* Data */
    key->datalen = sr.length;
    if (key->datalen > 0) {
        key->data = mem_maybedup(mctx, sr.base, key->datalen);
        if (key->data == NULL)
            return (ISC_R_NOMEMORY);
    } else
        key->data = NULL;

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

static inline void
freestruct_key(ARGS_FREESTRUCT) {
    dns_rdata_key_t *key = (dns_rdata_key_t *) source;

    REQUIRE(source != NULL);
    REQUIRE(key->common.rdtype == 25);

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

    if (key->data != NULL)
        isc_mem_free(key->mctx, key->data);
    key->mctx = NULL;
}

static inline isc_result_t
additionaldata_key(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == 25);

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_key(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == 25);

    dns_rdata_toregion(rdata, &r);

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

#endif  /* RDATA_GENERIC_KEY_25_C */