rdata/any_255/tsig_250.c

	tsig_250.c revision fad44a20eede1bbc66716241dede225500c91caa
/*
 * Copyright (C) 1999 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 1.12 1999/06/08 20:41:30 gson Exp $ */

 /* draft-ietf-dnsind-tsig-07.txt */

#ifndef RDATA_ANY_255_TSIG_250_C
#define RDATA_ANY_255_TSIG_250_C
#include <isc/str.h>

static dns_result_t
fromtext_any_tsig(dns_rdataclass_t class, 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(class == 255);

    /* Algorithm Name */
    RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
    dns_name_init(&name, NULL);
    buffer_fromregion(&buffer, &token.value.as_region,
              ISC_BUFFERTYPE_TEXT);
    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_strtouq(token.value.as_pointer, &e, 10);
    if (*e != 0)
        return (DNS_R_SYNTAX);
    if ((sigtime >> 48) != 0)
        return(DNS_R_RANGE);
    RETERR(uint16_tobuffer(sigtime >> 32, target));
    RETERR(uint32_tobuffer(sigtime & 0xffffffff, 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 dns_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->class == 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 dns_result_t
fromwire_any_tsig(dns_rdataclass_t class, 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(class == 255);

    if (dns_decompress_edns(dctx) >= 1 || !dns_decompress_strict(dctx))
        dns_decompress_setmethods(dctx, DNS_COMPRESS_ALL);
    else
        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_active(source, &sr);
    /* Time Signed + Fudge */
    if (sr.length < 8)
        return (DNS_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 (DNS_R_UNEXPECTEDEND);
    n = uint16_fromregion(&sr);
    if (sr.length < n + 2)
        return (DNS_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 (DNS_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 (DNS_R_UNEXPECTEDEND);
    n = uint16_fromregion(&sr);
    if (sr.length < n + 2)
        return (DNS_R_UNEXPECTEDEND);
    isc_buffer_forward(source, n + 2);
    return (mem_tobuffer(target, sr.base, n + 2));
}

static dns_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->class == 255);

    if (dns_compress_getedns(cctx) >= 1)
        dns_compress_setmethods(cctx, DNS_COMPRESS_ALL);
    else
        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 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 result;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->class == rdata2->class);
    REQUIRE(rdata1->type == 250);
    REQUIRE(rdata1->class == 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);
    result = dns_name_rdatacompare(&name1, &name2);
    if (result != 0)
        return (result);
    isc_region_consume(&r1, name_length(&name1));
    isc_region_consume(&r2, name_length(&name2));
    return (compare_region(&r1, &r2));
}

static dns_result_t
fromstruct_any_tsig(dns_rdataclass_t class, dns_rdatatype_t type,
            void *source, isc_buffer_t *target)
{

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

    source = source;
    target = target;

    return (DNS_R_NOTIMPLEMENTED);
}

static dns_result_t
tostruct_any_tsig(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {

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

    target = target;
    mctx = mctx;

    return (DNS_R_NOTIMPLEMENTED);
}

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

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

}
#endif  /* RDATA_ANY_255_TSIG_250_C */