rdata/generic/tkey_249.c

	tkey_249.c revision 652c80435a97ca558a47e2f320047b73b3626cd1
/*
 * Copyright (C) 1999, 2000  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: tkey_249.c,v 1.32 2000/05/13 22:46:07 tale Exp $ */

/*
 * Reviewed: Thu Mar 16 17:35:30 PST 2000 by halley.
 */

/* draft-ietf-dnsext-tkey-01.txt */

#ifndef RDATA_GENERIC_TKEY_249_C
#define RDATA_GENERIC_TKEY_249_C

#define RRTYPE_TKEY_ATTRIBUTES (DNS_RDATATYPEATTR_META)

static inline isc_result_t
fromtext_tkey(dns_rdataclass_t rdclass, dns_rdatatype_t type,
          isc_lex_t *lexer, dns_name_t *origin,
          isc_boolean_t downcase, isc_buffer_t *target)
{
    isc_token_t token;
    dns_rcode_t rcode;
    dns_name_t name;
    isc_buffer_t buffer;
    long i;
    char *e;

    UNUSED(rdclass);

    REQUIRE(type == 249);

    /*
     * Algorithm.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
    dns_name_init(&name, NULL);
    buffer_fromregion(&buffer, &token.value.as_region);
    origin = (origin != NULL) ? origin : dns_rootname;
    RETERR(dns_name_fromtext(&name, &buffer, origin, downcase, target));


    /*
     * Inception.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint32_tobuffer(token.value.as_ulong, target));

    /*
     * Expiration.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint32_tobuffer(token.value.as_ulong, target));

    /*
     * Mode.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (DNS_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Error.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
    if (dns_rcode_fromtext(&rcode, &token.value.as_textregion)
                != ISC_R_SUCCESS) {
        i = strtol(token.value.as_pointer, &e, 10);
        if (*e != 0)
            return (DNS_R_UNKNOWN);
        if (i < 0 || i > 0xffff)
            return (DNS_R_RANGE);
        rcode = (dns_rcode_t)i;
    }
    RETERR(uint16_tobuffer(rcode, target));

    /*
     * Key Size.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (DNS_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Key Data.
     */
    RETERR(isc_base64_tobuffer(lexer, target, (int)token.value.as_ulong));

    /*
     * Other Size.
     */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (DNS_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Other Data.
     */
    return (isc_base64_tobuffer(lexer, target, (int)token.value.as_ulong));
}

static inline isc_result_t
totext_tkey(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
        isc_buffer_t *target)
{
    isc_region_t sr, dr;
    char buf[sizeof "4294967295 "];
    unsigned long n;
    dns_name_t name;
    dns_name_t prefix;
    isc_boolean_t sub;

    REQUIRE(rdata->type == 249);

    dns_rdata_toregion(rdata, &sr);

    /*
     * Algorithm.
     */
    dns_name_init(&name, NULL);
    dns_name_init(&prefix, NULL);
    dns_name_fromregion(&name, &sr);
    sub = name_prefix(&name, tctx->origin, &prefix);
    RETERR(dns_name_totext(&prefix, sub, target));
    RETERR(str_totext(" ", target));
    isc_region_consume(&sr, name_length(&name));

    /*
     * Inception.
     */
    n = uint32_fromregion(&sr);
    isc_region_consume(&sr, 4);
    sprintf(buf, "%lu ", n);
    RETERR(str_totext(buf, target));

    /*
     * Expiration.
     */
    n = uint32_fromregion(&sr);
    isc_region_consume(&sr, 4);
    sprintf(buf, "%lu ", n);
    RETERR(str_totext(buf, target));

    /*
     * Mode.
     */
    n = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    sprintf(buf, "%lu ", n);
    RETERR(str_totext(buf, target));

    /*
     * Error.
     */
    n = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    if (dns_rcode_totext((dns_rcode_t)n, target) == ISC_R_SUCCESS)
        RETERR(str_totext(" ", target));
    else {
        sprintf(buf, "%lu ", n);
        RETERR(str_totext(buf, target));
    }

    /*
     * Key Size.
     */
    n = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    sprintf(buf, "%lu", n);
    RETERR(str_totext(buf, target));

    /*
     * Key Data.
     */
    REQUIRE(n <= sr.length);
    dr = sr;
    dr.length = n;
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" (", target));
    RETERR(str_totext(tctx->linebreak, target));
    RETERR(isc_base64_totext(&dr, tctx->width - 2,
                 tctx->linebreak, target));
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" ) ", target));
    else
        RETERR(str_totext(" ", target));
    isc_region_consume(&sr, n);

    /*
     * Other Size.
     */
    n = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    sprintf(buf, "%lu", n);
    RETERR(str_totext(buf, target));

    /*
     * Other Data.
     */
    REQUIRE(n <= sr.length);
    if (n != 0) {
        dr = sr;
        dr.length = n;
        if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
            RETERR(str_totext(" (", target));
        RETERR(str_totext(tctx->linebreak, target));
        RETERR(isc_base64_totext(&dr, 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_tkey(dns_rdataclass_t rdclass, dns_rdatatype_t type,
          isc_buffer_t *source, dns_decompress_t *dctx,
          isc_boolean_t downcase, isc_buffer_t *target)
{
    isc_region_t sr;
    unsigned long n;
    dns_name_t name;

    UNUSED(rdclass);

    REQUIRE(type == 249);

    dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

    /*
     * Algorithm.
     */
    dns_name_init(&name, NULL);
    RETERR(dns_name_fromwire(&name, source, dctx, downcase, target));

    /*
     * Inception: 4
     * Expiration: 4
     * Mode: 2
     * Error: 2
     */
    isc_buffer_activeregion(source, &sr);
    if (sr.length < 12)
        return (ISC_R_UNEXPECTEDEND);
    RETERR(mem_tobuffer(target, sr.base, 12));
    isc_region_consume(&sr, 12);
    isc_buffer_forward(source, 12);

    /*
     * Key Length + Key Data.
     */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    n = uint16_fromregion(&sr);
    if (sr.length < n + 2)
        return (ISC_R_UNEXPECTEDEND);
    RETERR(mem_tobuffer(target, sr.base, n + 2));
    isc_region_consume(&sr, n + 2);
    isc_buffer_forward(source, n + 2);

    /*
     * Other Length + Other Data.
     */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    n = uint16_fromregion(&sr);
    if (sr.length < n + 2)
        return (ISC_R_UNEXPECTEDEND);
    isc_buffer_forward(source, n + 2);
    return (mem_tobuffer(target, sr.base, n + 2));
}

static inline isc_result_t
towire_tkey(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
    isc_region_t sr;
    dns_name_t name;

    REQUIRE(rdata->type == 249);

    dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
    /*
     * Algorithm.
     */
    dns_rdata_toregion(rdata, &sr);
    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &sr);
    RETERR(dns_name_towire(&name, cctx, target));
    isc_region_consume(&sr, name_length(&name));

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

static inline int
compare_tkey(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
    isc_region_t r1;
    isc_region_t r2;
    dns_name_t name1;
    dns_name_t name2;
    int order;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 249);

    /*
     * Algorithm.
     */
    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    dns_name_init(&name1, NULL);
    dns_name_init(&name2, NULL);
    dns_name_fromregion(&name1, &r1);
    dns_name_fromregion(&name2, &r2);
    if ((order = dns_name_rdatacompare(&name1, &name2)) != 0)
        return (order);
    isc_region_consume(&r1, name_length(&name1));
    isc_region_consume(&r2, name_length(&name2));
    return (compare_region(&r1, &r2));
}

static inline isc_result_t
fromstruct_tkey(dns_rdataclass_t rdclass, dns_rdatatype_t type,
        void *source, isc_buffer_t *target)
{
    isc_region_t tr;
    dns_rdata_tkey_t *tkey;

    UNUSED(rdclass);
    UNUSED(source);
    UNUSED(target);

    REQUIRE(type == 249);

    tkey = (dns_rdata_tkey_t *)source;

    /*
     * Algorithm Name.
     */
    RETERR(name_tobuffer(&tkey->algorithm, target));

    /*
     * Inception: 32 bits.
     */
    RETERR(uint32_tobuffer(tkey->inception, target));

    /*
     * Expire: 32 bits.
     */
    RETERR(uint32_tobuffer(tkey->expire, target));

    /*
     * Mode: 16 bits.
     */
    RETERR(uint16_tobuffer(tkey->mode, target));

    /*
     * Error: 16 bits.
     */
    RETERR(uint16_tobuffer(tkey->error, target));

    /*
     * Key size: 16 bits.
     */
    RETERR(uint16_tobuffer(tkey->keylen, target));

    /*
     * Key.
     */
    if (tkey->keylen > 0) {
        isc_buffer_availableregion(target, &tr);
        if (tr.length < tkey->keylen)
            return (ISC_R_NOSPACE);
        memcpy(tr.base, tkey->key, tkey->keylen);
        isc_buffer_add(target, tkey->keylen);
    }

    /*
     * Other size: 16 bits.
     */
    RETERR(uint16_tobuffer(tkey->otherlen, target));

    /*
     * Other data.
     */
    if (tkey->otherlen > 0) {
        isc_buffer_availableregion(target, &tr);
        if (tr.length < tkey->otherlen)
            return (ISC_R_NOSPACE);
        memcpy(tr.base, tkey->other, tkey->otherlen);
        isc_buffer_add(target, tkey->otherlen);
    }

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
tostruct_tkey(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
    dns_rdata_tkey_t *tkey = target;
    dns_name_t alg;
    isc_region_t sr;

    REQUIRE(rdata->type == 249);
    REQUIRE(target != NULL);

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

    dns_rdata_toregion(rdata, &sr);

    /*
     * Algorithm Name.
     */
    dns_name_init(&alg, NULL);
    dns_name_fromregion(&alg, &sr);
    dns_name_init(&tkey->algorithm, NULL);
    RETERR(name_duporclone(&alg, mctx, &tkey->algorithm));
    isc_region_consume(&sr, name_length(&tkey->algorithm));

    /*
     * Inception.
     */
    tkey->inception = uint32_fromregion(&sr);
    isc_region_consume(&sr, 4);

    /*
     * Expire.
     */
    tkey->expire = uint32_fromregion(&sr);
    isc_region_consume(&sr, 4);

    /*
     * Mode.
     */
    tkey->mode = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /*
     * Error.
     */
    tkey->error = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /*
     * Key size.
     */
    tkey->keylen = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /*
     * Key.
     */
    if (tkey->keylen > 0) {
        tkey->key = mem_maybedup(mctx, sr.base, tkey->keylen);
        if (tkey->key == NULL)
            goto cleanup;
        isc_region_consume(&sr, tkey->keylen);
    } else
        tkey->key = NULL;

    /*
     * Other size.
     */
    tkey->otherlen = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /*
     * Other.
     */
    if (tkey->otherlen > 0) {
        tkey->other = mem_maybedup(mctx, sr.base, tkey->otherlen);
        if (tkey->other == NULL)
            goto cleanup;
    } else
        tkey->other = NULL;

    tkey->mctx = mctx;
    return (ISC_R_SUCCESS);

 cleanup:
    if (mctx != NULL)
        dns_name_free(&tkey->algorithm, mctx);
    if (mctx != NULL && tkey->key != NULL)
        isc_mem_free(mctx, tkey->key);
    return (ISC_R_NOMEMORY);
}

static inline void
freestruct_tkey(void *source) {
    dns_rdata_tkey_t *tkey = (dns_rdata_tkey_t *) source;

    REQUIRE(source != NULL);

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

    dns_name_free(&tkey->algorithm, tkey->mctx);
    if (tkey->key != NULL)
        isc_mem_free(tkey->mctx, tkey->key);
    if (tkey->other != NULL)
        isc_mem_free(tkey->mctx, tkey->other);
    tkey->mctx = NULL;
}

static inline isc_result_t
additionaldata_tkey(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
            void *arg)
{
    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    REQUIRE(rdata->type == 249);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_tkey(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg)
{
    UNUSED(rdata);
    UNUSED(digest);
    UNUSED(arg);

    REQUIRE(rdata->type == 249);

    return (ISC_R_NOTIMPLEMENTED);
}

#endif  /* RDATA_GENERIC_TKEY_249_C */