/*
 * 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: tsig_250.c,v 1.10 2020/09/14 08:40:43 florian Exp $ */

/* Reviewed: Thu Mar 16 13:39:43 PST 2000 by gson */

#ifndef RDATA_ANY_255_TSIG_250_C
#define RDATA_ANY_255_TSIG_250_C

static inline isc_result_t
totext_any_tsig(ARGS_TOTEXT) {
        isc_region_t sr;
        isc_region_t sigr;
        char buf[sizeof(" 281474976710655 ")];
        char *bufp;
        dns_name_t name;
        dns_name_t prefix;
        int sub;
        uint64_t sigtime;
        unsigned short n;

        REQUIRE(rdata->type == dns_rdatatype_tsig);
        REQUIRE(rdata->rdclass == dns_rdataclass_any);
        REQUIRE(rdata->length != 0);

        dns_rdata_toregion(rdata, &sr);
        /*
         * Algorithm Name.
         */
        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));

        /*
         * Time Signed.
         */
        sigtime = ((uint64_t)sr.base[0] << 40) |
                  ((uint64_t)sr.base[1] << 32) |
                  ((uint64_t)sr.base[2] << 24) |
                  ((uint64_t)sr.base[3] << 16) |
                  ((uint64_t)sr.base[4] << 8) |
                  (uint64_t)sr.base[5];
        isc_region_consume(&sr, 6);
        bufp = &buf[sizeof(buf) - 1];
        *bufp-- = 0;
        *bufp-- = ' ';
        do {
                *bufp-- = decdigits[sigtime % 10];
                sigtime /= 10;
        } while (sigtime != 0);
        bufp++;
        RETERR(isc_str_tobuffer(bufp, target));

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

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

        /*
         * Signature.
         */
        REQUIRE(n <= sr.length);
        sigr = sr;
        sigr.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(&sigr, 60, "", target));
        else
                RETERR(isc_base64_totext(&sigr, 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);

        /*
         * Original ID.
         */
        n = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);
        snprintf(buf, sizeof(buf), "%u ", n);
        RETERR(isc_str_tobuffer(buf, target));

        /*
         * Error.
         */
        n = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);
        RETERR(dns_tsigrcode_totext((dns_rcode_t)n, target));

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

        /*
         * Other.
         */
        if (tctx->width == 0)   /* No splitting */
                return (isc_base64_totext(&sr, 60, "", target));
        else
                return (isc_base64_totext(&sr, 60, " ", target));
}

static inline isc_result_t
fromwire_any_tsig(ARGS_FROMWIRE) {
        isc_region_t sr;
        dns_name_t name;
        unsigned long n;

        REQUIRE(type == dns_rdatatype_tsig);
        REQUIRE(rdclass == dns_rdataclass_any);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

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

        isc_buffer_activeregion(source, &sr);
        /*
         * Time Signed + Fudge.
         */
        if (sr.length < 8)
                return (ISC_R_UNEXPECTEDEND);
        RETERR(isc_mem_tobuffer(target, sr.base, 8));
        isc_region_consume(&sr, 8);
        isc_buffer_forward(source, 8);

        /*
         * Signature Length + Signature.
         */
        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);

        /*
         * Original ID + Error.
         */
        if (sr.length < 4)
                return (ISC_R_UNEXPECTEDEND);
        RETERR(isc_mem_tobuffer(target, sr.base,  4));
        isc_region_consume(&sr, 4);
        isc_buffer_forward(source, 4);

        /*
         * Other Length + Other.
         */
        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_any_tsig(ARGS_TOWIRE) {
        isc_region_t sr;
        dns_name_t name;
        dns_offsets_t offsets;

        REQUIRE(rdata->type == dns_rdatatype_tsig);
        REQUIRE(rdata->rdclass == dns_rdataclass_any);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
        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));
}

static inline isc_result_t
fromstruct_any_tsig(ARGS_FROMSTRUCT) {
        dns_rdata_any_tsig_t *tsig = source;
        isc_region_t tr;

        REQUIRE(type == dns_rdatatype_tsig);
        REQUIRE(rdclass == dns_rdataclass_any);
        REQUIRE(source != NULL);
        REQUIRE(tsig->common.rdclass == rdclass);
        REQUIRE(tsig->common.rdtype == type);

        UNUSED(type);
        UNUSED(rdclass);

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

        isc_buffer_availableregion(target, &tr);
        if (tr.length < 6 + 2 + 2)
                return (ISC_R_NOSPACE);

        /*
         * Time Signed: 48 bits.
         */
        RETERR(uint16_tobuffer((uint16_t)(tsig->timesigned >> 32),
                               target));
        RETERR(uint32_tobuffer((uint32_t)(tsig->timesigned & 0xffffffffU),
                               target));

        /*
         * Fudge.
         */
        RETERR(uint16_tobuffer(tsig->fudge, target));

        /*
         * Signature Size.
         */
        RETERR(uint16_tobuffer(tsig->siglen, target));

        /*
         * Signature.
         */
        RETERR(isc_mem_tobuffer(target, tsig->signature, tsig->siglen));

        isc_buffer_availableregion(target, &tr);
        if (tr.length < 2 + 2 + 2)
                return (ISC_R_NOSPACE);

        /*
         * Original ID.
         */
        RETERR(uint16_tobuffer(tsig->originalid, target));

        /*
         * Error.
         */
        RETERR(uint16_tobuffer(tsig->error, target));

        /*
         * Other Len.
         */
        RETERR(uint16_tobuffer(tsig->otherlen, target));

        /*
         * Other Data.
         */
        return (isc_mem_tobuffer(target, tsig->other, tsig->otherlen));
}

static inline isc_result_t
tostruct_any_tsig(ARGS_TOSTRUCT) {
        dns_rdata_any_tsig_t *tsig;
        dns_name_t alg;
        isc_region_t sr;

        REQUIRE(rdata->type == dns_rdatatype_tsig);
        REQUIRE(rdata->rdclass == dns_rdataclass_any);
        REQUIRE(rdata->length != 0);

        tsig = (dns_rdata_any_tsig_t *) target;
        tsig->common.rdclass = rdata->rdclass;
        tsig->common.rdtype = rdata->type;
        ISC_LINK_INIT(&tsig->common, link);

        dns_rdata_toregion(rdata, &sr);

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

        isc_region_consume(&sr, name_length(&tsig->algorithm));

        /*
         * Time Signed.
         */
        INSIST(sr.length >= 6);
        tsig->timesigned = ((uint64_t)sr.base[0] << 40) |
                           ((uint64_t)sr.base[1] << 32) |
                           ((uint64_t)sr.base[2] << 24) |
                           ((uint64_t)sr.base[3] << 16) |
                           ((uint64_t)sr.base[4] << 8) |
                           (uint64_t)sr.base[5];
        isc_region_consume(&sr, 6);

        /*
         * Fudge.
         */
        tsig->fudge = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);

        /*
         * Signature Size.
         */
        tsig->siglen = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);

        /*
         * Signature.
         */
        INSIST(sr.length >= tsig->siglen);
        tsig->signature = mem_maybedup(sr.base, tsig->siglen);
        if (tsig->signature == NULL)
                goto cleanup;
        isc_region_consume(&sr, tsig->siglen);

        /*
         * Original ID.
         */
        tsig->originalid = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);

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

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

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

        return (ISC_R_SUCCESS);

 cleanup:
        dns_name_free(&tsig->algorithm);
        free(tsig->signature);
        return (ISC_R_NOMEMORY);
}

static inline void
freestruct_any_tsig(ARGS_FREESTRUCT) {
        dns_rdata_any_tsig_t *tsig = (dns_rdata_any_tsig_t *) source;

        REQUIRE(source != NULL);
        REQUIRE(tsig->common.rdtype == dns_rdatatype_tsig);
        REQUIRE(tsig->common.rdclass == dns_rdataclass_any);

        dns_name_free(&tsig->algorithm);
        free(tsig->signature);
        free(tsig->other);
}

#endif  /* RDATA_ANY_255_TSIG_250_C */