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-rw-r--r--lib/dns/rdata/generic/sshfp_44.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/sshfp_44.c b/lib/dns/rdata/generic/sshfp_44.c
new file mode 100644
index 0000000..9ca97b4
--- /dev/null
+++ b/lib/dns/rdata/generic/sshfp_44.c
@@ -0,0 +1,296 @@
+/*
+ * 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.
+ */
+
+/* RFC 4255 */
+
+#ifndef RDATA_GENERIC_SSHFP_44_C
+#define RDATA_GENERIC_SSHFP_44_C
+
+#define RRTYPE_SSHFP_ATTRIBUTES (0)
+
+static isc_result_t
+fromtext_sshfp(ARGS_FROMTEXT) {
+ isc_token_t token;
+ int len = -1;
+
+ REQUIRE(type == dns_rdatatype_sshfp);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(origin);
+ UNUSED(options);
+ UNUSED(callbacks);
+
+ /*
+ * Algorithm.
+ */
+ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+ 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,
+ false));
+ if (token.value.as_ulong > 0xffU) {
+ RETTOK(ISC_R_RANGE);
+ }
+ RETERR(uint8_tobuffer(token.value.as_ulong, target));
+
+ /*
+ * Enforce known digest lengths.
+ */
+ switch (token.value.as_ulong) {
+ case 1:
+ len = ISC_SHA1_DIGESTLENGTH;
+ break;
+ case 2:
+ len = ISC_SHA256_DIGESTLENGTH;
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * Digest.
+ */
+ return (isc_hex_tobuffer(lexer, target, len));
+}
+
+static isc_result_t
+totext_sshfp(ARGS_TOTEXT) {
+ isc_region_t sr;
+ char buf[sizeof("64000 ")];
+ unsigned int n;
+
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+ REQUIRE(rdata->length != 0);
+
+ UNUSED(tctx);
+
+ dns_rdata_toregion(rdata, &sr);
+
+ /*
+ * Algorithm.
+ */
+ n = uint8_fromregion(&sr);
+ isc_region_consume(&sr, 1);
+ snprintf(buf, sizeof(buf), "%u ", n);
+ RETERR(str_totext(buf, target));
+
+ /*
+ * Digest type.
+ */
+ n = uint8_fromregion(&sr);
+ isc_region_consume(&sr, 1);
+ snprintf(buf, sizeof(buf), "%u", n);
+ RETERR(str_totext(buf, target));
+
+ if (sr.length == 0U) {
+ return (ISC_R_SUCCESS);
+ }
+
+ /*
+ * Digest.
+ */
+ 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_hex_totext(&sr, 0, "", target));
+ } else {
+ 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 isc_result_t
+fromwire_sshfp(ARGS_FROMWIRE) {
+ isc_region_t sr;
+
+ REQUIRE(type == dns_rdatatype_sshfp);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(dctx);
+ UNUSED(options);
+
+ isc_buffer_activeregion(source, &sr);
+ if (sr.length < 2) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+
+ if ((sr.base[1] == 1 && sr.length != ISC_SHA1_DIGESTLENGTH + 2) ||
+ (sr.base[1] == 2 && sr.length != ISC_SHA256_DIGESTLENGTH + 2))
+ {
+ return (DNS_R_FORMERR);
+ }
+
+ isc_buffer_forward(source, sr.length);
+ return (mem_tobuffer(target, sr.base, sr.length));
+}
+
+static isc_result_t
+towire_sshfp(ARGS_TOWIRE) {
+ isc_region_t sr;
+
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+ REQUIRE(rdata->length != 0);
+
+ UNUSED(cctx);
+
+ dns_rdata_toregion(rdata, &sr);
+ return (mem_tobuffer(target, sr.base, sr.length));
+}
+
+static 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 == dns_rdatatype_sshfp);
+ 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 isc_result_t
+fromstruct_sshfp(ARGS_FROMSTRUCT) {
+ dns_rdata_sshfp_t *sshfp = source;
+
+ REQUIRE(type == dns_rdatatype_sshfp);
+ REQUIRE(sshfp != 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 isc_result_t
+tostruct_sshfp(ARGS_TOSTRUCT) {
+ dns_rdata_sshfp_t *sshfp = target;
+ isc_region_t region;
+
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+ REQUIRE(sshfp != 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 void
+freestruct_sshfp(ARGS_FREESTRUCT) {
+ dns_rdata_sshfp_t *sshfp = source;
+
+ REQUIRE(sshfp != NULL);
+ REQUIRE(sshfp->common.rdtype == dns_rdatatype_sshfp);
+
+ if (sshfp->mctx == NULL) {
+ return;
+ }
+
+ if (sshfp->digest != NULL) {
+ isc_mem_free(sshfp->mctx, sshfp->digest);
+ }
+ sshfp->mctx = NULL;
+}
+
+static isc_result_t
+additionaldata_sshfp(ARGS_ADDLDATA) {
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+
+ UNUSED(rdata);
+ UNUSED(add);
+ UNUSED(arg);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+digest_sshfp(ARGS_DIGEST) {
+ isc_region_t r;
+
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+
+ dns_rdata_toregion(rdata, &r);
+
+ return ((digest)(arg, &r));
+}
+
+static bool
+checkowner_sshfp(ARGS_CHECKOWNER) {
+ REQUIRE(type == dns_rdatatype_sshfp);
+
+ UNUSED(name);
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(wildcard);
+
+ return (true);
+}
+
+static bool
+checknames_sshfp(ARGS_CHECKNAMES) {
+ REQUIRE(rdata->type == dns_rdatatype_sshfp);
+
+ UNUSED(rdata);
+ UNUSED(owner);
+ UNUSED(bad);
+
+ return (true);
+}
+
+static int
+casecompare_sshfp(ARGS_COMPARE) {
+ return (compare_sshfp(rdata1, rdata2));
+}
+
+#endif /* RDATA_GENERIC_SSHFP_44_C */