diff options
Diffstat (limited to 'bin/dnssec/dnssec-dsfromkey.c')
| -rw-r--r-- | bin/dnssec/dnssec-dsfromkey.c | 561 |
1 files changed, 561 insertions, 0 deletions
diff --git a/bin/dnssec/dnssec-dsfromkey.c b/bin/dnssec/dnssec-dsfromkey.c new file mode 100644 index 0000000..42aa9e5 --- /dev/null +++ b/bin/dnssec/dnssec-dsfromkey.c @@ -0,0 +1,561 @@ +/* + * 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 <stdbool.h> +#include <stdlib.h> + +#include <isc/attributes.h> +#include <isc/buffer.h> +#include <isc/commandline.h> +#include <isc/dir.h> +#include <isc/hash.h> +#include <isc/mem.h> +#include <isc/print.h> +#include <isc/result.h> +#include <isc/string.h> +#include <isc/util.h> + +#include <dns/callbacks.h> +#include <dns/db.h> +#include <dns/dbiterator.h> +#include <dns/ds.h> +#include <dns/fixedname.h> +#include <dns/keyvalues.h> +#include <dns/log.h> +#include <dns/master.h> +#include <dns/name.h> +#include <dns/rdata.h> +#include <dns/rdataclass.h> +#include <dns/rdataset.h> +#include <dns/rdatasetiter.h> +#include <dns/rdatatype.h> + +#include <dst/dst.h> + +#include "dnssectool.h" + +const char *program = "dnssec-dsfromkey"; + +static dns_rdataclass_t rdclass; +static dns_fixedname_t fixed; +static dns_name_t *name = NULL; +static isc_mem_t *mctx = NULL; +static uint32_t ttl; +static bool emitttl = false; + +static isc_result_t +initname(char *setname) { + isc_result_t result; + isc_buffer_t buf; + + name = dns_fixedname_initname(&fixed); + + isc_buffer_init(&buf, setname, strlen(setname)); + isc_buffer_add(&buf, strlen(setname)); + result = dns_name_fromtext(name, &buf, dns_rootname, 0, NULL); + return (result); +} + +static void +db_load_from_stream(dns_db_t *db, FILE *fp) { + isc_result_t result; + dns_rdatacallbacks_t callbacks; + + dns_rdatacallbacks_init(&callbacks); + result = dns_db_beginload(db, &callbacks); + if (result != ISC_R_SUCCESS) { + fatal("dns_db_beginload failed: %s", isc_result_totext(result)); + } + + result = dns_master_loadstream(fp, name, name, rdclass, 0, &callbacks, + mctx); + if (result != ISC_R_SUCCESS) { + fatal("can't load from input: %s", isc_result_totext(result)); + } + + result = dns_db_endload(db, &callbacks); + if (result != ISC_R_SUCCESS) { + fatal("dns_db_endload failed: %s", isc_result_totext(result)); + } +} + +static isc_result_t +loadset(const char *filename, dns_rdataset_t *rdataset) { + isc_result_t result; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + char setname[DNS_NAME_FORMATSIZE]; + + dns_name_format(name, setname, sizeof(setname)); + + result = dns_db_create(mctx, "rbt", name, dns_dbtype_zone, rdclass, 0, + NULL, &db); + if (result != ISC_R_SUCCESS) { + fatal("can't create database"); + } + + if (strcmp(filename, "-") == 0) { + db_load_from_stream(db, stdin); + filename = "input"; + } else { + result = dns_db_load(db, filename, dns_masterformat_text, 0); + if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE) { + fatal("can't load %s: %s", filename, + isc_result_totext(result)); + } + } + + result = dns_db_findnode(db, name, false, &node); + if (result != ISC_R_SUCCESS) { + fatal("can't find %s node in %s", setname, filename); + } + + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_dnskey, 0, 0, + rdataset, NULL); + + if (result == ISC_R_NOTFOUND) { + fatal("no DNSKEY RR for %s in %s", setname, filename); + } else if (result != ISC_R_SUCCESS) { + fatal("dns_db_findrdataset"); + } + + if (node != NULL) { + dns_db_detachnode(db, &node); + } + if (db != NULL) { + dns_db_detach(&db); + } + return (result); +} + +static isc_result_t +loadkeyset(char *dirname, dns_rdataset_t *rdataset) { + isc_result_t result; + char filename[PATH_MAX + 1]; + isc_buffer_t buf; + + dns_rdataset_init(rdataset); + + isc_buffer_init(&buf, filename, sizeof(filename)); + if (dirname != NULL) { + /* allow room for a trailing slash */ + if (strlen(dirname) >= isc_buffer_availablelength(&buf)) { + return (ISC_R_NOSPACE); + } + isc_buffer_putstr(&buf, dirname); + if (dirname[strlen(dirname) - 1] != '/') { + isc_buffer_putstr(&buf, "/"); + } + } + + if (isc_buffer_availablelength(&buf) < 7) { + return (ISC_R_NOSPACE); + } + isc_buffer_putstr(&buf, "keyset-"); + + result = dns_name_tofilenametext(name, false, &buf); + check_result(result, "dns_name_tofilenametext()"); + if (isc_buffer_availablelength(&buf) == 0) { + return (ISC_R_NOSPACE); + } + isc_buffer_putuint8(&buf, 0); + + return (loadset(filename, rdataset)); +} + +static void +loadkey(char *filename, unsigned char *key_buf, unsigned int key_buf_size, + dns_rdata_t *rdata) { + isc_result_t result; + dst_key_t *key = NULL; + isc_buffer_t keyb; + isc_region_t r; + + dns_rdata_init(rdata); + + isc_buffer_init(&keyb, key_buf, key_buf_size); + + result = dst_key_fromnamedfile(filename, NULL, DST_TYPE_PUBLIC, mctx, + &key); + if (result != ISC_R_SUCCESS) { + fatal("can't load %s.key: %s", filename, + isc_result_totext(result)); + } + + if (verbose > 2) { + char keystr[DST_KEY_FORMATSIZE]; + + dst_key_format(key, keystr, sizeof(keystr)); + fprintf(stderr, "%s: %s\n", program, keystr); + } + + result = dst_key_todns(key, &keyb); + if (result != ISC_R_SUCCESS) { + fatal("can't decode key"); + } + + isc_buffer_usedregion(&keyb, &r); + dns_rdata_fromregion(rdata, dst_key_class(key), dns_rdatatype_dnskey, + &r); + + rdclass = dst_key_class(key); + + name = dns_fixedname_initname(&fixed); + dns_name_copy(dst_key_name(key), name); + + dst_key_free(&key); +} + +static void +logkey(dns_rdata_t *rdata) { + isc_result_t result; + dst_key_t *key = NULL; + isc_buffer_t buf; + char keystr[DST_KEY_FORMATSIZE]; + + isc_buffer_init(&buf, rdata->data, rdata->length); + isc_buffer_add(&buf, rdata->length); + result = dst_key_fromdns(name, rdclass, &buf, mctx, &key); + if (result != ISC_R_SUCCESS) { + return; + } + + dst_key_format(key, keystr, sizeof(keystr)); + fprintf(stderr, "%s: %s\n", program, keystr); + + dst_key_free(&key); +} + +static void +emit(dns_dsdigest_t dt, bool showall, bool cds, dns_rdata_t *rdata) { + isc_result_t result; + unsigned char buf[DNS_DS_BUFFERSIZE]; + char text_buf[DST_KEY_MAXTEXTSIZE]; + char name_buf[DNS_NAME_MAXWIRE]; + char class_buf[10]; + isc_buffer_t textb, nameb, classb; + isc_region_t r; + dns_rdata_t ds; + dns_rdata_dnskey_t dnskey; + + isc_buffer_init(&textb, text_buf, sizeof(text_buf)); + isc_buffer_init(&nameb, name_buf, sizeof(name_buf)); + isc_buffer_init(&classb, class_buf, sizeof(class_buf)); + + dns_rdata_init(&ds); + + result = dns_rdata_tostruct(rdata, &dnskey, NULL); + if (result != ISC_R_SUCCESS) { + fatal("can't convert DNSKEY"); + } + + if ((dnskey.flags & DNS_KEYFLAG_REVOKE) != 0) { + return; + } + + if ((dnskey.flags & DNS_KEYFLAG_KSK) == 0 && !showall) { + return; + } + + result = dns_ds_buildrdata(name, rdata, dt, buf, &ds); + if (result != ISC_R_SUCCESS) { + fatal("can't build record"); + } + + result = dns_name_totext(name, false, &nameb); + if (result != ISC_R_SUCCESS) { + fatal("can't print name"); + } + + result = dns_rdata_tofmttext(&ds, (dns_name_t *)NULL, 0, 0, 0, "", + &textb); + + if (result != ISC_R_SUCCESS) { + fatal("can't print rdata"); + } + + result = dns_rdataclass_totext(rdclass, &classb); + if (result != ISC_R_SUCCESS) { + fatal("can't print class"); + } + + isc_buffer_usedregion(&nameb, &r); + printf("%.*s ", (int)r.length, r.base); + + if (emitttl) { + printf("%u ", ttl); + } + + isc_buffer_usedregion(&classb, &r); + printf("%.*s", (int)r.length, r.base); + + if (cds) { + printf(" CDS "); + } else { + printf(" DS "); + } + + isc_buffer_usedregion(&textb, &r); + printf("%.*s\n", (int)r.length, r.base); +} + +static void +emits(bool showall, bool cds, dns_rdata_t *rdata) { + unsigned i, n; + + n = sizeof(dtype) / sizeof(dtype[0]); + for (i = 0; i < n; i++) { + if (dtype[i] != 0) { + emit(dtype[i], showall, cds, rdata); + } + } +} + +noreturn static void +usage(void); + +static void +usage(void) { + fprintf(stderr, "Usage:\n"); + fprintf(stderr, " %s [options] keyfile\n\n", program); + fprintf(stderr, " %s [options] -f zonefile [zonename]\n\n", program); + fprintf(stderr, " %s [options] -s dnsname\n\n", program); + fprintf(stderr, " %s [-h|-V]\n\n", program); + fprintf(stderr, "Version: %s\n", PACKAGE_VERSION); + fprintf(stderr, "Options:\n" + " -1: digest algorithm SHA-1\n" + " -2: digest algorithm SHA-256\n" + " -a algorithm: digest algorithm (SHA-1, SHA-256 or " + "SHA-384)\n" + " -A: include all keys in DS set, not just KSKs (-f " + "only)\n" + " -c class: rdata class for DS set (default IN) (-f " + "or -s only)\n" + " -C: print CDS records\n" + " -f zonefile: read keys from a zone file\n" + " -h: print help information\n" + " -K directory: where to find key or keyset files\n" + " -s: read keys from keyset-<dnsname> file\n" + " -T: TTL of output records (omitted by default)\n" + " -v level: verbosity\n" + " -V: print version information\n"); + fprintf(stderr, "Output: DS or CDS RRs\n"); + + exit(-1); +} + +int +main(int argc, char **argv) { + char *classname = NULL; + char *filename = NULL, *dir = NULL, *namestr; + char *endp, *arg1; + int ch; + bool cds = false; + bool usekeyset = false; + bool showall = false; + isc_result_t result; + isc_log_t *log = NULL; + dns_rdataset_t rdataset; + dns_rdata_t rdata; + + dns_rdata_init(&rdata); + + if (argc == 1) { + usage(); + } + + isc_mem_create(&mctx); + + isc_commandline_errprint = false; + +#define OPTIONS "12Aa:Cc:d:Ff:K:l:sT:v:hV" + while ((ch = isc_commandline_parse(argc, argv, OPTIONS)) != -1) { + switch (ch) { + case '1': + add_dtype(DNS_DSDIGEST_SHA1); + break; + case '2': + add_dtype(DNS_DSDIGEST_SHA256); + break; + case 'A': + showall = true; + break; + case 'a': + add_dtype(strtodsdigest(isc_commandline_argument)); + break; + case 'C': + cds = true; + break; + case 'c': + classname = isc_commandline_argument; + break; + case 'd': + fprintf(stderr, + "%s: the -d option is deprecated; " + "use -K\n", + program); + /* fall through */ + case 'K': + dir = isc_commandline_argument; + if (strlen(dir) == 0U) { + fatal("directory must be non-empty string"); + } + break; + case 'f': + filename = isc_commandline_argument; + break; + case 'l': + fatal("-l option (DLV lookaside) is obsolete"); + break; + case 's': + usekeyset = true; + break; + case 'T': + emitttl = true; + ttl = strtottl(isc_commandline_argument); + break; + case 'v': + verbose = strtol(isc_commandline_argument, &endp, 0); + if (*endp != '\0') { + fatal("-v must be followed by a number"); + } + break; + case 'F': + /* Reserved for FIPS mode */ + FALLTHROUGH; + case '?': + if (isc_commandline_option != '?') { + fprintf(stderr, "%s: invalid argument -%c\n", + program, isc_commandline_option); + } + FALLTHROUGH; + case 'h': + /* Does not return. */ + usage(); + + case 'V': + /* Does not return. */ + version(program); + + default: + fprintf(stderr, "%s: unhandled option -%c\n", program, + isc_commandline_option); + exit(1); + } + } + + rdclass = strtoclass(classname); + + if (usekeyset && filename != NULL) { + fatal("cannot use both -s and -f"); + } + + /* When not using -f, -A is implicit */ + if (filename == NULL) { + showall = true; + } + + /* Default digest type if none specified. */ + if (dtype[0] == 0) { + dtype[0] = DNS_DSDIGEST_SHA256; + } + + /* + * Use local variable arg1 so that clang can correctly analyse + * reachable paths rather than 'argc < isc_commandline_index + 1'. + */ + arg1 = argv[isc_commandline_index]; + if (arg1 == NULL && filename == NULL) { + fatal("the key file name was not specified"); + } + if (arg1 != NULL && argv[isc_commandline_index + 1] != NULL) { + fatal("extraneous arguments"); + } + + result = dst_lib_init(mctx, NULL); + if (result != ISC_R_SUCCESS) { + fatal("could not initialize dst: %s", + isc_result_totext(result)); + } + + setup_logging(mctx, &log); + + dns_rdataset_init(&rdataset); + + if (usekeyset || filename != NULL) { + if (arg1 == NULL) { + /* using file name as the zone name */ + namestr = filename; + } else { + namestr = arg1; + } + + result = initname(namestr); + if (result != ISC_R_SUCCESS) { + fatal("could not initialize name %s", namestr); + } + + if (usekeyset) { + result = loadkeyset(dir, &rdataset); + } else { + INSIST(filename != NULL); + result = loadset(filename, &rdataset); + } + + if (result != ISC_R_SUCCESS) { + fatal("could not load DNSKEY set: %s\n", + isc_result_totext(result)); + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdata_init(&rdata); + dns_rdataset_current(&rdataset, &rdata); + + if (verbose > 2) { + logkey(&rdata); + } + + emits(showall, cds, &rdata); + } + } else { + unsigned char key_buf[DST_KEY_MAXSIZE]; + + loadkey(arg1, key_buf, DST_KEY_MAXSIZE, &rdata); + + emits(showall, cds, &rdata); + } + + if (dns_rdataset_isassociated(&rdataset)) { + dns_rdataset_disassociate(&rdataset); + } + cleanup_logging(&log); + dst_lib_destroy(); + if (verbose > 10) { + isc_mem_stats(mctx, stdout); + } + isc_mem_destroy(&mctx); + + fflush(stdout); + if (ferror(stdout)) { + fprintf(stderr, "write error\n"); + return (1); + } else { + return (0); + } +} |