rdata/generic/sshfp_44.c

	sshfp_44.c revision dafcb997e390efa4423883dafd100c975c4095d6
/*
 * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 2003  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 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: sshfp_44.c,v 1.3 2004/03/05 05:10:18 marka Exp $ */

/* draft-ietf-secsh-dns-05.txt */

#ifndef RDATA_GENERIC_SSHFP_44_C
#define RDATA_GENERIC_SSHFP_44_C

#define RRTYPE_SSHFP_ATTRIBUTES (0)

static inline isc_result_t
fromtext_sshfp(ARGS_FROMTEXT) {
    isc_token_t token;

    REQUIRE(type == 44);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(origin);
    UNUSED(options);
    UNUSED(callbacks);

    /*
     * Algorithm.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Digest type.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));
    type = (isc_uint16_t) token.value.as_ulong;

    /*
     * Digest.
     */
    return (isc_hex_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_sshfp(ARGS_TOTEXT) {
    isc_region_t sr;
    char buf[sizeof("64000 ")];
    unsigned int n;

    REQUIRE(rdata->type == 44);
    REQUIRE(rdata->length != 0);

    UNUSED(tctx);

    dns_rdata_toregion(rdata, &sr);

    /*
     * Algorithm.
     */
    n = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);
    sprintf(buf, "%u ", n);
    RETERR(str_totext(buf, target));

    /*
     * Digest type.
     */
    n = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);
    sprintf(buf, "%u", n);
    RETERR(str_totext(buf, target));

    /*
     * Digest.
     */
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" (", target));
    RETERR(str_totext(tctx->linebreak, target));
    RETERR(isc_hex_totext(&sr, 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_sshfp(ARGS_FROMWIRE) {
    isc_region_t sr;

    REQUIRE(type == 44);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(dctx);
    UNUSED(options);

    isc_buffer_activeregion(source, &sr);
    if (sr.length < 4)
        return (ISC_R_UNEXPECTEDEND);

    isc_buffer_forward(source, sr.length);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_sshfp(ARGS_TOWIRE) {
    isc_region_t sr;

    REQUIRE(rdata->type == 44);
    REQUIRE(rdata->length != 0);

    UNUSED(cctx);

    dns_rdata_toregion(rdata, &sr);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline int
compare_sshfp(ARGS_COMPARE) {
    isc_region_t r1;
    isc_region_t r2;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 44);
    REQUIRE(rdata1->length != 0);
    REQUIRE(rdata2->length != 0);

    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    return (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_sshfp(ARGS_FROMSTRUCT) {
    dns_rdata_sshfp_t *sshfp = source;

    REQUIRE(type == 44);
    REQUIRE(source != NULL);
    REQUIRE(sshfp->common.rdtype == type);
    REQUIRE(sshfp->common.rdclass == rdclass);

    UNUSED(type);
    UNUSED(rdclass);

    RETERR(uint8_tobuffer(sshfp->algorithm, target));
    RETERR(uint8_tobuffer(sshfp->digest_type, target));

    return (mem_tobuffer(target, sshfp->digest, sshfp->length));
}

static inline isc_result_t
tostruct_sshfp(ARGS_TOSTRUCT) {
    dns_rdata_sshfp_t *sshfp = target;
    isc_region_t region;

    REQUIRE(rdata->type == 44);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

    sshfp->common.rdclass = rdata->rdclass;
    sshfp->common.rdtype = rdata->type;
    ISC_LINK_INIT(&sshfp->common, link);

    dns_rdata_toregion(rdata, &region);

    sshfp->algorithm = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    sshfp->digest_type = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    sshfp->length = region.length;

    sshfp->digest = mem_maybedup(mctx, region.base, region.length);
    if (sshfp->digest == NULL)
        return (ISC_R_NOMEMORY);

    sshfp->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_sshfp(ARGS_FREESTRUCT) {
    dns_rdata_sshfp_t *sshfp = source;

    REQUIRE(sshfp != NULL);
    REQUIRE(sshfp->common.rdtype == 44);

    if (sshfp->mctx == NULL)
        return;

    if (sshfp->digest != NULL)
        isc_mem_free(sshfp->mctx, sshfp->digest);
    sshfp->mctx = NULL;
}

static inline isc_result_t
additionaldata_sshfp(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == 44);

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_sshfp(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == 44);

    dns_rdata_toregion(rdata, &r);

    return ((digest)(arg, &r));
}

static inline isc_boolean_t
checkowner_sshfp(ARGS_CHECKOWNER) {

    REQUIRE(type == 44);

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

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_sshfp(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == 44);

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

    return (ISC_TRUE);
}

#endif  /* RDATA_GENERIC_SSHFP_44_C */