/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * 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: tkey_249.c,v 1.14 2024/04/23 13:34:50 jsg 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

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;
        int sub;

        REQUIRE(rdata->type == dns_rdatatype_tkey);
        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(isc_str_tobuffer(" ", target));
        isc_region_consume(&sr, name_length(&name));

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

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

        /*
         * Mode.
         */
        n = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);
        snprintf(buf, sizeof(buf), "%lu ", n);
        RETERR(isc_str_tobuffer(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(isc_str_tobuffer(" ", target));
        else {
                snprintf(buf, sizeof(buf), "%lu ", n);
                RETERR(isc_str_tobuffer(buf, target));
        }

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

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

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

        /*
         * Other Data.
         */
        REQUIRE(n <= sr.length);
        if (n != 0U) {
                dr = sr;
                dr.length = n;
                if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
                        RETERR(isc_str_tobuffer(" (", target));
                RETERR(isc_str_tobuffer(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(isc_str_tobuffer(" )", 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 == dns_rdatatype_tkey);

        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(isc_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(isc_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 (isc_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 == dns_rdatatype_tkey);
        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 (isc_mem_tobuffer(target, sr.base, sr.length));
}

#endif  /* RDATA_GENERIC_TKEY_249_C */