/*

 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")

 *

 * SPDX-License-Identifier: MPL-2.0

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, you can obtain one at https://mozilla.org/MPL/2.0/.

 *

 * See the COPYRIGHT file distributed with this work for additional

 * information regarding copyright ownership.

 */

/* draft-ietf-dnsext-tkey-01.txt */

#ifndef RDATA_GENERIC_TKEY_249_C

#define RDATA_GENERIC_TKEY_249_C

#define RRTYPE_TKEY_ATTRIBUTES (DNS_RDATATYPEATTR_META)

static isc_result_t

fromtext_tkey(ARGS_FROMTEXT) {

  isc_token_t token;

  dns_rcode_t rcode;

  isc_buffer_t buffer;

  long i;

  char *e;

  REQUIRE(type == dns_rdatatype_tkey);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(callbacks);

  /*

   * Algorithm.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,

              false));

  buffer_fromregion(&buffer, &token.value.as_region);

  if (origin == NULL) {

    origin = dns_rootname;

  }

  RETTOK(dns_name_wirefromtext(&buffer, origin, options, target));

  /*

   * Inception.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  RETERR(uint32_tobuffer(token.value.as_ulong, target));

  /*

   * Expiration.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  RETERR(uint32_tobuffer(token.value.as_ulong, target));

  /*

   * Mode.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  if (token.value.as_ulong > 0xffffU) {

    RETTOK(ISC_R_RANGE);

  }

  RETERR(uint16_tobuffer(token.value.as_ulong, target));

  /*

   * Error.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,

              false));

  if (dns_tsigrcode_fromtext(&rcode, &token.value.as_textregion) !=

      ISC_R_SUCCESS)

  {

    i = strtol(DNS_AS_STR(token), &e, 10);

    if (*e != 0) {

      RETTOK(DNS_R_UNKNOWN);

    }

    if (i < 0 || i > 0xffff) {

      RETTOK(ISC_R_RANGE);

    }

    rcode = (dns_rcode_t)i;

  }

  RETERR(uint16_tobuffer(rcode, target));

  /*

   * Key Size.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  if (token.value.as_ulong > 0xffffU) {

    RETTOK(ISC_R_RANGE);

  }

  RETERR(uint16_tobuffer(token.value.as_ulong, target));

  /*

   * Key Data.

   */

  RETERR(isc_base64_tobuffer(lexer, target, (int)token.value.as_ulong));

  /*

   * Other Size.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  if (token.value.as_ulong > 0xffffU) {

    RETTOK(ISC_R_RANGE);

  }

  RETERR(uint16_tobuffer(token.value.as_ulong, target));

  /*

   * Other Data.

   */

  return isc_base64_tobuffer(lexer, target, (int)token.value.as_ulong);

}

static isc_result_t

totext_tkey(ARGS_TOTEXT) {

  isc_region_t sr, dr;

  char buf[sizeof("4294967295 ")];

  unsigned long n;

  dns_name_t name;

  dns_name_t prefix;

  unsigned int opts;

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  REQUIRE(rdata->length != 0);

  dns_rdata_toregion(rdata, &sr);

  /*

   * Algorithm.

   */

  dns_name_init(&name);

  dns_name_init(&prefix);

  dns_name_fromregion(&name, &sr);

  opts = name_prefix(&name, tctx->origin, &prefix) ? DNS_NAME_OMITFINALDOT

               : 0;

  RETERR(dns_name_totext(&prefix, opts, target));

  RETERR(str_totext(" ", target));

  isc_region_consume(&sr, name_length(&name));

  /*

   * Inception.

   */

  n = uint32_fromregion(&sr);

  isc_region_consume(&sr, 4);

  snprintf(buf, sizeof(buf), "%lu ", n);

  RETERR(str_totext(buf, target));

  /*

   * Expiration.

   */

  n = uint32_fromregion(&sr);

  isc_region_consume(&sr, 4);

  snprintf(buf, sizeof(buf), "%lu ", n);

  RETERR(str_totext(buf, target));

  /*

   * Mode.

   */

  n = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  snprintf(buf, sizeof(buf), "%lu ", n);

  RETERR(str_totext(buf, target));

  /*

   * Error.

   */

  n = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  if (dns_tsigrcode_totext((dns_rcode_t)n, target) == ISC_R_SUCCESS) {

    RETERR(str_totext(" ", target));

  } else {

    snprintf(buf, sizeof(buf), "%lu ", n);

    RETERR(str_totext(buf, target));

  }

  /*

   * Key Size.

   */

  n = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  snprintf(buf, sizeof(buf), "%lu", n);

  RETERR(str_totext(buf, target));

  /*

   * Key Data.

   */

  REQUIRE(n <= sr.length);

  dr = sr;

  dr.length = n;

  if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {

    RETERR(str_totext(" (", target));

  }

  RETERR(str_totext(tctx->linebreak, target));

  if (tctx->width == 0) { /* No splitting */

    RETERR(isc_base64_totext(&dr, 60, "", target));

  } else {

    RETERR(isc_base64_totext(&dr, 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);

  /*

   * Other Size.

   */

  n = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  snprintf(buf, sizeof(buf), "%lu", n);

  RETERR(str_totext(buf, target));

  /*

   * Other Data.

   */

  REQUIRE(n <= sr.length);

  if (n != 0U) {

    dr = sr;

    dr.length = n;

    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {

      RETERR(str_totext(" (", target));

    }

    RETERR(str_totext(tctx->linebreak, target));

    if (tctx->width == 0) { /* No splitting */

      RETERR(isc_base64_totext(&dr, 60, "", target));

    } else {

      RETERR(isc_base64_totext(&dr, tctx->width - 2,

             tctx->linebreak, target));

    }

    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {

      RETERR(str_totext(" )", target));

    }

  }

  return ISC_R_SUCCESS;

}

static isc_result_t

fromwire_tkey(ARGS_FROMWIRE) {

  isc_region_t sr;

  unsigned long n;

  dns_name_t name;

  REQUIRE(type == dns_rdatatype_tkey);

  UNUSED(type);

  UNUSED(rdclass);

  dctx = dns_decompress_setpermitted(dctx, false);

  /*

   * Algorithm.

   */

  dns_name_init(&name);

  RETERR(dns_name_fromwire(&name, source, dctx, target));

  /*

   * Inception: 4

   * Expiration: 4

   * Mode: 2

   * Error: 2

   */

  isc_buffer_activeregion(source, &sr);

  if (sr.length < 12) {

    return ISC_R_UNEXPECTEDEND;

  }

  RETERR(mem_tobuffer(target, sr.base, 12));

  isc_region_consume(&sr, 12);

  isc_buffer_forward(source, 12);

  /*

   * Key Length + Key Data.

   */

  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);

  /*

   * Other Length + Other Data.

   */

  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 isc_result_t

towire_tkey(ARGS_TOWIRE) {

  isc_region_t sr;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  REQUIRE(rdata->length != 0);

  dns_compress_setpermitted(cctx, false);

  /*

   * Algorithm.

   */

  dns_rdata_toregion(rdata, &sr);

  dns_name_init(&name);

  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_tkey(ARGS_COMPARE) {

  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 == dns_rdatatype_tkey);

  REQUIRE(rdata1->length != 0);

  REQUIRE(rdata2->length != 0);

  /*

   * Algorithm.

   */

  dns_rdata_toregion(rdata1, &r1);

  dns_rdata_toregion(rdata2, &r2);

  dns_name_init(&name1);

  dns_name_init(&name2);

  dns_name_fromregion(&name1, &r1);

  dns_name_fromregion(&name2, &r2);

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

    return order;

  }

  isc_region_consume(&r1, name_length(&name1));

  isc_region_consume(&r2, name_length(&name2));

  return isc_region_compare(&r1, &r2);

}

static isc_result_t

fromstruct_tkey(ARGS_FROMSTRUCT) {

  dns_rdata_tkey_t *tkey = source;

  REQUIRE(type == dns_rdatatype_tkey);

  REQUIRE(tkey != NULL);

  REQUIRE(tkey->common.rdtype == type);

  REQUIRE(tkey->common.rdclass == rdclass);

  UNUSED(type);

  UNUSED(rdclass);

  /*

   * Algorithm Name.

   */

  RETERR(name_tobuffer(&tkey->algorithm, target));

  /*

   * Inception: 32 bits.

   */

  RETERR(uint32_tobuffer(tkey->inception, target));

  /*

   * Expire: 32 bits.

   */

  RETERR(uint32_tobuffer(tkey->expire, target));

  /*

   * Mode: 16 bits.

   */

  RETERR(uint16_tobuffer(tkey->mode, target));

  /*

   * Error: 16 bits.

   */

  RETERR(uint16_tobuffer(tkey->error, target));

  /*

   * Key size: 16 bits.

   */

  RETERR(uint16_tobuffer(tkey->keylen, target));

  /*

   * Key.

   */

  RETERR(mem_tobuffer(target, tkey->key, tkey->keylen));

  /*

   * Other size: 16 bits.

   */

  RETERR(uint16_tobuffer(tkey->otherlen, target));

  /*

   * Other data.

   */

  return mem_tobuffer(target, tkey->other, tkey->otherlen);

}

static isc_result_t

tostruct_tkey(ARGS_TOSTRUCT) {

  dns_rdata_tkey_t *tkey = target;

  dns_name_t alg;

  isc_region_t sr;

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  REQUIRE(tkey != NULL);

  REQUIRE(rdata->length != 0);

  DNS_RDATACOMMON_INIT(tkey, rdata->type, rdata->rdclass);

  dns_rdata_toregion(rdata, &sr);

  /*

   * Algorithm Name.

   */

  dns_name_init(&alg);

  dns_name_fromregion(&alg, &sr);

  dns_name_init(&tkey->algorithm);

  name_duporclone(&alg, mctx, &tkey->algorithm);

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

  /*

   * Inception.

   */

  tkey->inception = uint32_fromregion(&sr);

  isc_region_consume(&sr, 4);

  /*

   * Expire.

   */

  tkey->expire = uint32_fromregion(&sr);

  isc_region_consume(&sr, 4);

  /*

   * Mode.

   */

  tkey->mode = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  /*

   * Error.

   */

  tkey->error = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  /*

   * Key size.

   */

  tkey->keylen = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  /*

   * Key.

   */

  INSIST(tkey->keylen + 2U <= sr.length);

  tkey->key = mem_maybedup(mctx, sr.base, tkey->keylen);

  isc_region_consume(&sr, tkey->keylen);

  /*

   * Other size.

   */

  tkey->otherlen = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

  /*

   * Other.

   */

  INSIST(tkey->otherlen <= sr.length);

  tkey->other = mem_maybedup(mctx, sr.base, tkey->otherlen);

  tkey->mctx = mctx;

  return ISC_R_SUCCESS;

}

static void

freestruct_tkey(ARGS_FREESTRUCT) {

  dns_rdata_tkey_t *tkey = (dns_rdata_tkey_t *)source;

  REQUIRE(tkey != NULL);

  if (tkey->mctx == NULL) {

    return;

  }

  dns_name_free(&tkey->algorithm, tkey->mctx);

  if (tkey->key != NULL) {

    isc_mem_free(tkey->mctx, tkey->key);

  }

  if (tkey->other != NULL) {

    isc_mem_free(tkey->mctx, tkey->other);

  }

  tkey->mctx = NULL;

}

static isc_result_t

additionaldata_tkey(ARGS_ADDLDATA) {

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(add);

  UNUSED(arg);

  return ISC_R_SUCCESS;

}

static isc_result_t

digest_tkey(ARGS_DIGEST) {

  UNUSED(rdata);

  UNUSED(digest);

  UNUSED(arg);

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  return ISC_R_NOTIMPLEMENTED;

}

static bool

checkowner_tkey(ARGS_CHECKOWNER) {

  REQUIRE(type == dns_rdatatype_tkey);

  UNUSED(name);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(wildcard);

  return true;

}

static bool

checknames_tkey(ARGS_CHECKNAMES) {

  REQUIRE(rdata->type == dns_rdatatype_tkey);

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(bad);

  return true;

}

static int

casecompare_tkey(ARGS_COMPARE) {

  return compare_tkey(rdata1, rdata2);

}

#endif /* RDATA_GENERIC_TKEY_249_C */