tkey_249.c

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/*
 * Copyright (C) 2004, 2007, 2009, 2011, 2012, 2014  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2003  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.
 */

/* $Id$ */

/*
 * 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(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_rcode_t rcode;
        dns_name_t name;
        isc_buffer_t buffer;
        long i;
        char *e;

        REQUIRE(type == 249);

        UNUSED(type);
        UNUSED(rdclass);
        UNUSED(callbacks);

        /*
         * Algorithm.
         */
        RETERR(isc_lex_getmastertoken(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;
        RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));


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

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

        /*
         * Mode.
         */
        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));

        /*
         * Error.
         */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                                      ISC_FALSE));
        if (dns_tsigrcode_fromtext(&rcode, &token.value.as_textregion)
                                != ISC_R_SUCCESS)
        {
                i = strtol(DNS_AS_STR(token), &e, 10);
                if (*e != 0)
                        RETTOK(DNS_R_UNKNOWN);
                if (i < 0 || i > 0xffff)
                        RETTOK(ISC_R_RANGE);
                rcode = (dns_rcode_t)i;
        }
        RETERR(uint16_tobuffer(rcode, target));

        /*
         * Key Size.
         */
        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));

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

        /*
         * Other Size.
         */
        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));

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

static inline isc_result_t
totext_tkey(ARGS_TOTEXT) {
        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);
        REQUIRE(rdata->length != 0);

        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_tsigrcode_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));
        if (tctx->width == 0)   /* No splitting */
                RETERR(isc_base64_totext(&dr, 60, "", target));
        else
                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 != 0U) {
            dr = sr;
            dr.length = n;
            if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
                    RETERR(str_totext(" (", target));
            RETERR(str_totext(tctx->linebreak, target));
                if (tctx->width == 0)   /* No splitting */
                        RETERR(isc_base64_totext(&dr, 60, "", target));
                else
                        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(ARGS_FROMWIRE) {
        isc_region_t sr;
        unsigned long n;
        dns_name_t name;

        REQUIRE(type == 249);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

        /*
         * Algorithm.
         */
        dns_name_init(&name, NULL);
        RETERR(dns_name_fromwire(&name, source, dctx, options, 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(ARGS_TOWIRE) {
        isc_region_t sr;
        dns_name_t name;
        dns_offsets_t offsets;

        REQUIRE(rdata->type == 249);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
        /*
         * Algorithm.
         */
        dns_rdata_toregion(rdata, &sr);
        dns_name_init(&name, offsets);
        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(ARGS_COMPARE) {
        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);
        REQUIRE(rdata1->length != 0);
        REQUIRE(rdata2->length != 0);

        /*
         * 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 (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_tkey(ARGS_FROMSTRUCT) {
        dns_rdata_tkey_t *tkey = source;

        REQUIRE(type == 249);
        REQUIRE(source != NULL);
        REQUIRE(tkey->common.rdtype == type);
        REQUIRE(tkey->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        /*
         * 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.
         */
        RETERR(mem_tobuffer(target, tkey->key, tkey->keylen));

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

        /*
         * Other data.
         */
        return (mem_tobuffer(target, tkey->other, tkey->otherlen));
}

static inline isc_result_t
tostruct_tkey(ARGS_TOSTRUCT) {
        dns_rdata_tkey_t *tkey = target;
        dns_name_t alg;
        isc_region_t sr;

        REQUIRE(rdata->type == 249);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

        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.
         */
        INSIST(tkey->keylen + 2U <= sr.length);
        tkey->key = mem_maybedup(mctx, sr.base, tkey->keylen);
        if (tkey->key == NULL)
                goto cleanup;
        isc_region_consume(&sr, tkey->keylen);

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

        /*
         * Other.
         */
        INSIST(tkey->otherlen <= sr.length);
        tkey->other = mem_maybedup(mctx, sr.base, tkey->otherlen);
        if (tkey->other == NULL)
                goto cleanup;

        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(ARGS_FREESTRUCT) {
        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(ARGS_ADDLDATA) {
        UNUSED(rdata);
        UNUSED(add);
        UNUSED(arg);

        REQUIRE(rdata->type == 249);

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_tkey(ARGS_DIGEST) {
        UNUSED(rdata);
        UNUSED(digest);
        UNUSED(arg);

        REQUIRE(rdata->type == 249);

        return (ISC_R_NOTIMPLEMENTED);
}

static inline isc_boolean_t
checkowner_tkey(ARGS_CHECKOWNER) {

        REQUIRE(type == 249);

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

        return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_tkey(ARGS_CHECKNAMES) {

        REQUIRE(rdata->type == 249);

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

        return (ISC_TRUE);
}

static inline isc_result_t
casecompare_tkey(ARGS_COMPARE) {
        return (compare_tkey(rdata1, rdata2));
}
#endif  /* RDATA_GENERIC_TKEY_249_C */

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