ipseckey_45.c

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/*
 * Copyright (C) 2005, 2007, 2009, 2011, 2012, 2014  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.
 */

/* $Id$ */

#ifndef RDATA_GENERIC_IPSECKEY_45_C
#define RDATA_GENERIC_IPSECKEY_45_C

#include <string.h>

#include <isc/net.h>

#define RRTYPE_IPSECKEY_ATTRIBUTES (0)

static inline isc_result_t
fromtext_ipseckey(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_name_t name;
        isc_buffer_t buffer;
        unsigned int gateway;
        struct in_addr addr;
        unsigned char addr6[16];
        isc_region_t region;

        REQUIRE(type == 45);

        UNUSED(type);
        UNUSED(rdclass);
        UNUSED(callbacks);

        /*
         * Precedence.
         */
        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));

        /*
         * Gateway type.
         */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                                      ISC_FALSE));
        if (token.value.as_ulong > 0x3U)
                RETTOK(ISC_R_RANGE);
        RETERR(uint8_tobuffer(token.value.as_ulong, target));
        gateway = token.value.as_ulong;

        /*
         * 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));

        /*
         * Gateway.
         */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                                      ISC_FALSE));

        switch (gateway) {
        case 0:
                if (strcmp(DNS_AS_STR(token), ".") != 0)
                        RETTOK(DNS_R_SYNTAX);
                break;

        case 1:
                if (getquad(DNS_AS_STR(token), &addr, lexer, callbacks) != 1)
                        RETTOK(DNS_R_BADDOTTEDQUAD);
                isc_buffer_availableregion(target, &region);
                if (region.length < 4)
                        return (ISC_R_NOSPACE);
                memmove(region.base, &addr, 4);
                isc_buffer_add(target, 4);
                break;

        case 2:
                if (inet_pton(AF_INET6, DNS_AS_STR(token), addr6) != 1)
                        RETTOK(DNS_R_BADAAAA);
                isc_buffer_availableregion(target, &region);
                if (region.length < 16)
                        return (ISC_R_NOSPACE);
                memmove(region.base, addr6, 16);
                isc_buffer_add(target, 16);
                break;

        case 3:
                dns_name_init(&name, NULL);
                buffer_fromregion(&buffer, &token.value.as_region);
                origin = (origin != NULL) ? origin : dns_rootname;
                RETTOK(dns_name_fromtext(&name, &buffer, origin,
                                         options, target));
                break;
        }

        /*
         * Public key.
         */
        return (isc_base64_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_ipseckey(ARGS_TOTEXT) {
        isc_region_t region;
        dns_name_t name;
        char buf[sizeof("255 ")];
        unsigned short num;
        unsigned short gateway;

        REQUIRE(rdata->type == 45);
        REQUIRE(rdata->length >= 3);

        dns_name_init(&name, NULL);

        if (rdata->data[1] > 3U)
                return (ISC_R_NOTIMPLEMENTED);

        if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
                RETERR(str_totext("( ", target));

        /*
         * Precedence.
         */
        dns_rdata_toregion(rdata, &region);
        num = uint8_fromregion(&region);
        isc_region_consume(&region, 1);
        sprintf(buf, "%u ", num);
        RETERR(str_totext(buf, target));

        /*
         * Gateway type.
         */
        gateway = uint8_fromregion(&region);
        isc_region_consume(&region, 1);
        sprintf(buf, "%u ", gateway);
        RETERR(str_totext(buf, target));

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

        /*
         * Gateway.
         */
        switch (gateway) {
        case 0:
                RETERR(str_totext(".", target));
                break;

        case 1:
                RETERR(inet_totext(AF_INET, &region, target));
                isc_region_consume(&region, 4);
                break;

        case 2:
                RETERR(inet_totext(AF_INET6, &region, target));
                isc_region_consume(&region, 16);
                break;

        case 3:
                dns_name_fromregion(&name, &region);
                RETERR(dns_name_totext(&name, ISC_FALSE, target));
                isc_region_consume(&region, name_length(&name));
                break;
        }

        /*
         * Key.
         */
        if (region.length > 0U) {
                RETERR(str_totext(tctx->linebreak, target));
                if (tctx->width == 0)   /* No splitting */
                        RETERR(isc_base64_totext(&region, 60, "", target));
                else
                        RETERR(isc_base64_totext(&region, 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_ipseckey(ARGS_FROMWIRE) {
        dns_name_t name;
        isc_region_t region;

        REQUIRE(type == 45);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

        dns_name_init(&name, NULL);

        isc_buffer_activeregion(source, &region);
        if (region.length < 3)
                return (ISC_R_UNEXPECTEDEND);

        switch (region.base[1]) {
        case 0:
                isc_buffer_forward(source, region.length);
                return (mem_tobuffer(target, region.base, region.length));

        case 1:
                if (region.length < 7)
                        return (ISC_R_UNEXPECTEDEND);
                isc_buffer_forward(source, region.length);
                return (mem_tobuffer(target, region.base, region.length));

        case 2:
                if (region.length < 19)
                        return (ISC_R_UNEXPECTEDEND);
                isc_buffer_forward(source, region.length);
                return (mem_tobuffer(target, region.base, region.length));

        case 3:
                RETERR(mem_tobuffer(target, region.base, 3));
                isc_buffer_forward(source, 3);
                RETERR(dns_name_fromwire(&name, source, dctx, options, target));
                isc_buffer_activeregion(source, &region);
                isc_buffer_forward(source, region.length);
                return(mem_tobuffer(target, region.base, region.length));

        default:
                return (ISC_R_NOTIMPLEMENTED);
        }
}

static inline isc_result_t
towire_ipseckey(ARGS_TOWIRE) {
        isc_region_t region;

        REQUIRE(rdata->type == 45);
        REQUIRE(rdata->length != 0);

        UNUSED(cctx);

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

static inline int
compare_ipseckey(ARGS_COMPARE) {
        isc_region_t region1;
        isc_region_t region2;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 45);
        REQUIRE(rdata1->length >= 3);
        REQUIRE(rdata2->length >= 3);

        dns_rdata_toregion(rdata1, &region1);
        dns_rdata_toregion(rdata2, &region2);

        return (isc_region_compare(&region1, &region2));
}

static inline isc_result_t
fromstruct_ipseckey(ARGS_FROMSTRUCT) {
        dns_rdata_ipseckey_t *ipseckey = source;
        isc_region_t region;
        isc_uint32_t n;

        REQUIRE(type == 45);
        REQUIRE(source != NULL);
        REQUIRE(ipseckey->common.rdtype == type);
        REQUIRE(ipseckey->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        if (ipseckey->gateway_type > 3U)
                return (ISC_R_NOTIMPLEMENTED);

        RETERR(uint8_tobuffer(ipseckey->precedence, target));
        RETERR(uint8_tobuffer(ipseckey->gateway_type, target));
        RETERR(uint8_tobuffer(ipseckey->algorithm, target));

        switch  (ipseckey->gateway_type) {
        case 0:
                break;

        case 1:
                n = ntohl(ipseckey->in_addr.s_addr);
                RETERR(uint32_tobuffer(n, target));
                break;

        case 2:
                RETERR(mem_tobuffer(target, ipseckey->in6_addr.s6_addr, 16));
                break;

        case 3:
                dns_name_toregion(&ipseckey->gateway, &region);
                RETERR(isc_buffer_copyregion(target, &region));
                break;
        }

        return (mem_tobuffer(target, ipseckey->key, ipseckey->keylength));
}

static inline isc_result_t
tostruct_ipseckey(ARGS_TOSTRUCT) {
        isc_region_t region;
        dns_rdata_ipseckey_t *ipseckey = target;
        dns_name_t name;
        isc_uint32_t n;

        REQUIRE(rdata->type == 45);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length >= 3);

        if (rdata->data[1] > 3U)
                return (ISC_R_NOTIMPLEMENTED);

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

        dns_name_init(&name, NULL);
        dns_rdata_toregion(rdata, &region);

        ipseckey->precedence = uint8_fromregion(&region);
        isc_region_consume(&region, 1);

        ipseckey->gateway_type = uint8_fromregion(&region);
        isc_region_consume(&region, 1);

        ipseckey->algorithm = uint8_fromregion(&region);
        isc_region_consume(&region, 1);

        switch (ipseckey->gateway_type) {
        case 0:
                break;

        case 1:
                n = uint32_fromregion(&region);
                ipseckey->in_addr.s_addr = htonl(n);
                isc_region_consume(&region, 4);
                break;

        case 2:
                memmove(ipseckey->in6_addr.s6_addr, region.base, 16);
                isc_region_consume(&region, 16);
                break;

        case 3:
                dns_name_init(&ipseckey->gateway, NULL);
                dns_name_fromregion(&name, &region);
                RETERR(name_duporclone(&name, mctx, &ipseckey->gateway));
                isc_region_consume(&region, name_length(&name));
                break;
        }

        ipseckey->keylength = region.length;
        if (ipseckey->keylength != 0U) {
                ipseckey->key = mem_maybedup(mctx, region.base,
                                             ipseckey->keylength);
                if (ipseckey->key == NULL) {
                        if (ipseckey->gateway_type == 3)
                                dns_name_free(&ipseckey->gateway,
                                              ipseckey->mctx);
                        return (ISC_R_NOMEMORY);
                }
        } else
                ipseckey->key = NULL;

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

static inline void
freestruct_ipseckey(ARGS_FREESTRUCT) {
        dns_rdata_ipseckey_t *ipseckey = source;

        REQUIRE(source != NULL);
        REQUIRE(ipseckey->common.rdtype == 45);

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

        if (ipseckey->gateway_type == 3)
                dns_name_free(&ipseckey->gateway, ipseckey->mctx);

        if (ipseckey->key != NULL)
                isc_mem_free(ipseckey->mctx, ipseckey->key);

        ipseckey->mctx = NULL;
}

static inline isc_result_t
additionaldata_ipseckey(ARGS_ADDLDATA) {

        REQUIRE(rdata->type == 45);

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_ipseckey(ARGS_DIGEST) {
        isc_region_t region;

        REQUIRE(rdata->type == 45);

        dns_rdata_toregion(rdata, &region);
        return ((digest)(arg, &region));
}

static inline isc_boolean_t
checkowner_ipseckey(ARGS_CHECKOWNER) {

        REQUIRE(type == 45);

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

        return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_ipseckey(ARGS_CHECKNAMES) {

        REQUIRE(rdata->type == 45);

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

        return (ISC_TRUE);
}

static inline int
casecompare_ipseckey(ARGS_COMPARE) {
        isc_region_t region1;
        isc_region_t region2;
        dns_name_t name1;
        dns_name_t name2;
        int order;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 45);
        REQUIRE(rdata1->length >= 3);
        REQUIRE(rdata2->length >= 3);

        dns_rdata_toregion(rdata1, &region1);
        dns_rdata_toregion(rdata2, &region2);

        if (memcmp(region1.base, region2.base, 3) != 0 || region1.base[1] != 3)
                return (isc_region_compare(&region1, &region2));

        dns_name_init(&name1, NULL);
        dns_name_init(&name2, NULL);

        isc_region_consume(&region1, 3);
        isc_region_consume(&region2, 3);

        dns_name_fromregion(&name1, &region1);
        dns_name_fromregion(&name2, &region2);

        order = dns_name_rdatacompare(&name1, &name2);
        if (order != 0)
                return (order);

        isc_region_consume(&region1, name_length(&name1));
        isc_region_consume(&region2, name_length(&name2));

        return (isc_region_compare(&region1, &region2));
}

#endif  /* RDATA_GENERIC_IPSECKEY_45_C */

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