rdata/any_255/tsig_250.c

	tsig_250.c revision 5466ce3f279d9fa83ce826bcdc9482bc591152ae
/*
 * 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: tsig_250.c,v 1.33 2000/05/05 18:15:00 gson Exp $ */

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

/* draft-ietf-dnsext-tsig-00.txt */

#ifndef RDATA_ANY_255_TSIG_250_C
#define RDATA_ANY_255_TSIG_250_C

#include <isc/string.h>

#define RRTYPE_TSIG_ATTRIBUTES \
    (DNS_RDATATYPEATTR_META | DNS_RDATATYPEATTR_NOTQUESTION)

static inline isc_result_t
fromtext_any_tsig(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_name_t name;
    isc_uint64_t sigtime;
    isc_buffer_t buffer;
    char *e;

    REQUIRE(type == 250);
    REQUIRE(rdclass == 255);

    /* Algorithm Name */
    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));

    /* Time Signed: 48 bits */
    RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
    sigtime = isc_string_touint64(token.value.as_pointer, &e, 10);
    if (*e != 0)
        return (DNS_R_SYNTAX);
    if ((sigtime >> 48) != 0)
        return (DNS_R_RANGE);
    RETERR(uint16_tobuffer((isc_uint16_t)(sigtime >> 32), target));
    RETERR(uint32_tobuffer((isc_uint32_t)(sigtime & 0xffffffffU), target));

    /* Fudge */
    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));

    /* Signature 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));

    /* Signature */
    RETERR(isc_base64_tobuffer(lexer, target, token.value.as_ulong));

    /* Original ID */
    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_number, ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (DNS_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /* Other Len */
    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, token.value.as_ulong));
}

static inline isc_result_t
totext_any_tsig(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
        isc_buffer_t *target)
{
    isc_region_t sr;
    isc_region_t sigr;
    char buf[sizeof "281474976710655 "];
    char *bufp;
    dns_name_t name;
    dns_name_t prefix;
    isc_boolean_t sub;
    isc_uint64_t sigtime;
    unsigned short n;

    REQUIRE(rdata->type == 250);
    REQUIRE(rdata->rdclass == 255);

    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(str_totext(" ", target));
    isc_region_consume(&sr, name_length(&name));

    /* Time Signed */
    sigtime = ((isc_uint64_t)sr.base[0] << 40) |
          ((isc_uint64_t)sr.base[1] << 32) |
          (sr.base[2] << 24) | (sr.base[3] << 16) |
          (sr.base[4] << 8) | 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(str_totext(bufp, target));

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

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

    /* Signature */
    REQUIRE(n <= sr.length);
    sigr = sr;
    sigr.length = n;
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" (", target));
    RETERR(str_totext(tctx->linebreak, target));
    RETERR(isc_base64_totext(&sigr, 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);

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

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

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

    /* Other */
    return (isc_base64_totext(&sr, 60, " ", target));
}

static inline isc_result_t
fromwire_any_tsig(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;
    dns_name_t name;
    unsigned long n;

    REQUIRE(type == 250);
    REQUIRE(rdclass == 255);

    dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

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

    isc_buffer_activeregion(source, &sr);
    /* Time Signed + Fudge */
    if (sr.length < 8)
        return (ISC_R_UNEXPECTEDEND);
    RETERR(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(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(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 (mem_tobuffer(target, sr.base, n + 2));
}

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

    REQUIRE(rdata->type == 250);
    REQUIRE(rdata->rdclass == 255);

    dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
    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_any_tsig(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 == 250);
    REQUIRE(rdata1->rdclass == 255);

    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);
    order = dns_name_rdatacompare(&name1, &name2);
    if (order != 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_any_tsig(dns_rdataclass_t rdclass, dns_rdatatype_t type,
            void *source, isc_buffer_t *target)
{
    isc_region_t tr;
    dns_rdata_any_tsig_t *tsig;

    REQUIRE(type == 250);
    REQUIRE(rdclass == 255);

    tsig = (dns_rdata_any_tsig_t *)source;

    /* 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((isc_uint16_t)(tsig->timesigned >> 32), target));
    RETERR(uint32_tobuffer((isc_uint32_t)(tsig->timesigned & 0xffffffffU),
                   target));

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

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

    /* Signature */
    if (tsig->siglen > 0) {
        isc_buffer_availableregion(target, &tr);
        if (tr.length < tsig->siglen)
            return (ISC_R_NOSPACE);
        memcpy(tr.base, tsig->signature, tsig->siglen);
        isc_buffer_add(target, 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 */
    if (tsig->otherlen > 0) {
        isc_buffer_availableregion(target, &tr);
        if (tr.length < tsig->otherlen)
            return (ISC_R_NOSPACE);
        memcpy(tr.base, tsig->other, tsig->otherlen);
        isc_buffer_add(target, tsig->otherlen);
    }

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
tostruct_any_tsig(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
    dns_rdata_any_tsig_t *tsig;
    dns_name_t alg;
    isc_region_t sr;

    REQUIRE(rdata->type == 250);
    REQUIRE(rdata->rdclass == 255);

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

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

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

    /* Time Signed */
    if (sr.length < 6)
        return (ISC_R_UNEXPECTEDEND);
    tsig->timesigned = ((isc_uint64_t)sr.base[0] << 40) |
               ((isc_uint64_t)sr.base[1] << 32) |
               (sr.base[2] << 24) | (sr.base[3] << 16) |
               (sr.base[4] << 8) | sr.base[5];
    isc_region_consume(&sr, 6);

    /* Fudge */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    tsig->fudge = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Signature Size */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    tsig->siglen = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Signature */
    if (sr.length < tsig->siglen)
        return (ISC_R_UNEXPECTEDEND);
    tsig->signature = isc_mem_get(mctx, tsig->siglen);
    if (tsig->signature == NULL)
        return (ISC_R_NOMEMORY);
    memcpy(tsig->signature, sr.base, tsig->siglen);
    isc_region_consume(&sr, tsig->siglen);

    /* Original ID */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    tsig->originalid = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Error */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    tsig->error = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Other Size */
    if (sr.length < 2)
        return (ISC_R_UNEXPECTEDEND);
    tsig->otherlen = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);

    /* Other */
    if (sr.length < tsig->otherlen)
        return (ISC_R_UNEXPECTEDEND);
    tsig->other = isc_mem_get(mctx, tsig->otherlen);
    if (tsig->other == NULL)
        return (ISC_R_NOMEMORY);
    memcpy(tsig->other, sr.base, tsig->otherlen);
    isc_region_consume(&sr, tsig->otherlen);

    return (ISC_R_SUCCESS);
}

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

    REQUIRE(source != NULL);
    REQUIRE(tsig->common.rdclass == 255);
    REQUIRE(tsig->common.rdtype == 250);

    dns_name_free(&tsig->algorithm, tsig->mctx);
    if (tsig->signature != NULL)
        isc_mem_put(tsig->mctx, tsig->signature, tsig->siglen);
    if (tsig->other != NULL)
        isc_mem_put(tsig->mctx, tsig->other, tsig->otherlen);
}

static inline isc_result_t
additionaldata_any_tsig(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
            void *arg)
{
    REQUIRE(rdata->type == 250);
    REQUIRE(rdata->rdclass == 255);

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_any_tsig(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {

    REQUIRE(rdata->type == 250);
    REQUIRE(rdata->rdclass == 255);

    UNUSED(rdata);
    UNUSED(digest);
    UNUSED(arg);

    return (ISC_R_NOTIMPLEMENTED);
}

#endif  /* RDATA_ANY_255_TSIG_250_C */