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-rw-r--r--bin/named/tsigconf.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/bin/named/tsigconf.c b/bin/named/tsigconf.c
new file mode 100644
index 0000000..085cc39
--- /dev/null
+++ b/bin/named/tsigconf.c
@@ -0,0 +1,181 @@
+/*
+ * 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.
+ */
+
+/*! \file */
+
+#include <inttypes.h>
+
+#include <isc/base64.h>
+#include <isc/buffer.h>
+#include <isc/mem.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <dns/result.h>
+#include <dns/tsig.h>
+
+#include <isccfg/cfg.h>
+
+#include <named/config.h>
+#include <named/log.h>
+#include <named/tsigconf.h>
+
+static isc_result_t
+add_initial_keys(const cfg_obj_t *list, dns_tsig_keyring_t *ring,
+ isc_mem_t *mctx) {
+ dns_tsigkey_t *tsigkey = NULL;
+ const cfg_listelt_t *element;
+ const cfg_obj_t *key = NULL;
+ const char *keyid = NULL;
+ unsigned char *secret = NULL;
+ int secretalloc = 0;
+ int secretlen = 0;
+ isc_result_t ret;
+ isc_stdtime_t now;
+ uint16_t bits;
+
+ for (element = cfg_list_first(list); element != NULL;
+ element = cfg_list_next(element))
+ {
+ const cfg_obj_t *algobj = NULL;
+ const cfg_obj_t *secretobj = NULL;
+ dns_name_t keyname;
+ const dns_name_t *alg;
+ const char *algstr;
+ char keynamedata[1024];
+ isc_buffer_t keynamesrc, keynamebuf;
+ const char *secretstr;
+ isc_buffer_t secretbuf;
+
+ key = cfg_listelt_value(element);
+ keyid = cfg_obj_asstring(cfg_map_getname(key));
+
+ algobj = NULL;
+ secretobj = NULL;
+ (void)cfg_map_get(key, "algorithm", &algobj);
+ (void)cfg_map_get(key, "secret", &secretobj);
+ INSIST(algobj != NULL && secretobj != NULL);
+
+ /*
+ * Create the key name.
+ */
+ dns_name_init(&keyname, NULL);
+ isc_buffer_constinit(&keynamesrc, keyid, strlen(keyid));
+ isc_buffer_add(&keynamesrc, strlen(keyid));
+ isc_buffer_init(&keynamebuf, keynamedata, sizeof(keynamedata));
+ ret = dns_name_fromtext(&keyname, &keynamesrc, dns_rootname,
+ DNS_NAME_DOWNCASE, &keynamebuf);
+ if (ret != ISC_R_SUCCESS) {
+ goto failure;
+ }
+
+ /*
+ * Create the algorithm.
+ */
+ algstr = cfg_obj_asstring(algobj);
+ if (named_config_getkeyalgorithm(algstr, &alg, &bits) !=
+ ISC_R_SUCCESS)
+ {
+ cfg_obj_log(algobj, named_g_lctx, ISC_LOG_ERROR,
+ "key '%s': has a "
+ "unsupported algorithm '%s'",
+ keyid, algstr);
+ ret = DNS_R_BADALG;
+ goto failure;
+ }
+
+ secretstr = cfg_obj_asstring(secretobj);
+ secretalloc = secretlen = strlen(secretstr) * 3 / 4;
+ secret = isc_mem_get(mctx, secretlen);
+ isc_buffer_init(&secretbuf, secret, secretlen);
+ ret = isc_base64_decodestring(secretstr, &secretbuf);
+ if (ret != ISC_R_SUCCESS) {
+ goto failure;
+ }
+ secretlen = isc_buffer_usedlength(&secretbuf);
+
+ isc_stdtime_get(&now);
+ ret = dns_tsigkey_create(&keyname, alg, secret, secretlen,
+ false, NULL, now, now, mctx, ring,
+ &tsigkey);
+ isc_mem_put(mctx, secret, secretalloc);
+ secret = NULL;
+ if (ret != ISC_R_SUCCESS) {
+ goto failure;
+ }
+ /*
+ * Set digest bits.
+ */
+ dst_key_setbits(tsigkey->key, bits);
+ dns_tsigkey_detach(&tsigkey);
+ }
+
+ return (ISC_R_SUCCESS);
+
+failure:
+ cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
+ "configuring key '%s': %s", keyid, isc_result_totext(ret));
+
+ if (secret != NULL) {
+ isc_mem_put(mctx, secret, secretalloc);
+ }
+ return (ret);
+}
+
+isc_result_t
+named_tsigkeyring_fromconfig(const cfg_obj_t *config, const cfg_obj_t *vconfig,
+ isc_mem_t *mctx, dns_tsig_keyring_t **ringp) {
+ const cfg_obj_t *maps[3];
+ const cfg_obj_t *keylist;
+ dns_tsig_keyring_t *ring = NULL;
+ isc_result_t result;
+ int i;
+
+ REQUIRE(ringp != NULL && *ringp == NULL);
+
+ i = 0;
+ if (config != NULL) {
+ maps[i++] = config;
+ }
+ if (vconfig != NULL) {
+ maps[i++] = cfg_tuple_get(vconfig, "options");
+ }
+ maps[i] = NULL;
+
+ result = dns_tsigkeyring_create(mctx, &ring);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ for (i = 0;; i++) {
+ if (maps[i] == NULL) {
+ break;
+ }
+ keylist = NULL;
+ result = cfg_map_get(maps[i], "key", &keylist);
+ if (result != ISC_R_SUCCESS) {
+ continue;
+ }
+ result = add_initial_keys(keylist, ring, mctx);
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+ }
+
+ *ringp = ring;
+ return (ISC_R_SUCCESS);
+
+failure:
+ dns_tsigkeyring_detach(&ring);
+ return (result);
+}