diff options
Diffstat (limited to 'bin/dnssec/dnssec-keyfromlabel.c')
| -rw-r--r-- | bin/dnssec/dnssec-keyfromlabel.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/bin/dnssec/dnssec-keyfromlabel.c b/bin/dnssec/dnssec-keyfromlabel.c new file mode 100644 index 0000000..e7587c3 --- /dev/null +++ b/bin/dnssec/dnssec-keyfromlabel.c @@ -0,0 +1,327 @@ +/* + * Copyright (C) 2007, 2008 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: dnssec-keyfromlabel.c,v 1.4 2008/09/24 02:46:21 marka Exp $ */ + +/*! \file */ + +#include <config.h> + +#include <stdlib.h> + +#include <isc/buffer.h> +#include <isc/commandline.h> +#include <isc/entropy.h> +#include <isc/mem.h> +#include <isc/region.h> +#include <isc/string.h> +#include <isc/util.h> + +#include <dns/fixedname.h> +#include <dns/keyvalues.h> +#include <dns/log.h> +#include <dns/name.h> +#include <dns/rdataclass.h> +#include <dns/result.h> +#include <dns/secalg.h> + +#include <dst/dst.h> + +#include "dnssectool.h" + +#define MAX_RSA 4096 /* should be long enough... */ + +const char *program = "dnssec-keyfromlabel"; +int verbose; + +static const char *algs = "RSA | RSAMD5 | DH | DSA | RSASHA1 |" + " NSEC3DSA | NSEC3RSASHA1"; + +static void +usage(void) { + fprintf(stderr, "Usage:\n"); + fprintf(stderr, " %s -a alg -l label [options] name\n\n", + program); + fprintf(stderr, "Version: %s\n", VERSION); + fprintf(stderr, "Required options:\n"); + fprintf(stderr, " -a algorithm: %s\n", algs); + fprintf(stderr, " -l label: label of the key\n"); + fprintf(stderr, " name: owner of the key\n"); + fprintf(stderr, "Other options:\n"); + fprintf(stderr, " -n nametype: ZONE | HOST | ENTITY | USER | OTHER\n"); + fprintf(stderr, " (DNSKEY generation defaults to ZONE\n"); + fprintf(stderr, " -c <class> (default: IN)\n"); + fprintf(stderr, " -f keyflag: KSK\n"); + fprintf(stderr, " -t <type>: " + "AUTHCONF | NOAUTHCONF | NOAUTH | NOCONF " + "(default: AUTHCONF)\n"); + fprintf(stderr, " -p <protocol>: " + "default: 3 [dnssec]\n"); + fprintf(stderr, " -v <verbose level>\n"); + fprintf(stderr, " -k : generate a TYPE=KEY key\n"); + fprintf(stderr, "Output:\n"); + fprintf(stderr, " K<name>+<alg>+<id>.key, " + "K<name>+<alg>+<id>.private\n"); + + exit (-1); +} + +int +main(int argc, char **argv) { + char *algname = NULL, *nametype = NULL, *type = NULL; + char *classname = NULL; + char *endp; + dst_key_t *key = NULL, *oldkey; + dns_fixedname_t fname; + dns_name_t *name; + isc_uint16_t flags = 0, ksk = 0; + dns_secalg_t alg; + isc_boolean_t null_key = ISC_FALSE; + isc_mem_t *mctx = NULL; + int ch; + int protocol = -1, signatory = 0; + isc_result_t ret; + isc_textregion_t r; + char filename[255]; + isc_buffer_t buf; + isc_log_t *log = NULL; + isc_entropy_t *ectx = NULL; + dns_rdataclass_t rdclass; + int options = DST_TYPE_PRIVATE | DST_TYPE_PUBLIC; + char *label = NULL; + + if (argc == 1) + usage(); + + RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS); + + dns_result_register(); + + isc_commandline_errprint = ISC_FALSE; + + while ((ch = isc_commandline_parse(argc, argv, + "a:c:f:kl:n:p:t:v:h")) != -1) + { + switch (ch) { + case 'a': + algname = isc_commandline_argument; + break; + case 'c': + classname = isc_commandline_argument; + break; + case 'f': + if (strcasecmp(isc_commandline_argument, "KSK") == 0) + ksk = DNS_KEYFLAG_KSK; + else + fatal("unknown flag '%s'", + isc_commandline_argument); + break; + case 'k': + options |= DST_TYPE_KEY; + break; + case 'l': + label = isc_commandline_argument; + break; + case 'n': + nametype = isc_commandline_argument; + break; + case 'p': + protocol = strtol(isc_commandline_argument, &endp, 10); + if (*endp != '\0' || protocol < 0 || protocol > 255) + fatal("-p must be followed by a number " + "[0..255]"); + break; + case 't': + type = 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 '?': + if (isc_commandline_option != '?') + fprintf(stderr, "%s: invalid argument -%c\n", + program, isc_commandline_option); + case 'h': + usage(); + + default: + fprintf(stderr, "%s: unhandled option -%c\n", + program, isc_commandline_option); + exit(1); + } + } + + if (ectx == NULL) + setup_entropy(mctx, NULL, &ectx); + ret = dst_lib_init(mctx, ectx, + ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY); + if (ret != ISC_R_SUCCESS) + fatal("could not initialize dst"); + + setup_logging(verbose, mctx, &log); + + if (label == NULL) + fatal("the key label was not specified"); + if (argc < isc_commandline_index + 1) + fatal("the key name was not specified"); + if (argc > isc_commandline_index + 1) + fatal("extraneous arguments"); + + if (algname == NULL) + fatal("no algorithm was specified"); + if (strcasecmp(algname, "RSA") == 0) { + fprintf(stderr, "The use of RSA (RSAMD5) is not recommended.\n" + "If you still wish to use RSA (RSAMD5) please " + "specify \"-a RSAMD5\"\n"); + return (1); + } else { + r.base = algname; + r.length = strlen(algname); + ret = dns_secalg_fromtext(&alg, &r); + if (ret != ISC_R_SUCCESS) + fatal("unknown algorithm %s", algname); + if (alg == DST_ALG_DH) + options |= DST_TYPE_KEY; + } + + if (type != NULL && (options & DST_TYPE_KEY) != 0) { + if (strcasecmp(type, "NOAUTH") == 0) + flags |= DNS_KEYTYPE_NOAUTH; + else if (strcasecmp(type, "NOCONF") == 0) + flags |= DNS_KEYTYPE_NOCONF; + else if (strcasecmp(type, "NOAUTHCONF") == 0) { + flags |= (DNS_KEYTYPE_NOAUTH | DNS_KEYTYPE_NOCONF); + } + else if (strcasecmp(type, "AUTHCONF") == 0) + /* nothing */; + else + fatal("invalid type %s", type); + } + + if (nametype == NULL) { + if ((options & DST_TYPE_KEY) != 0) /* KEY */ + fatal("no nametype specified"); + flags |= DNS_KEYOWNER_ZONE; /* DNSKEY */ + } else if (strcasecmp(nametype, "zone") == 0) + flags |= DNS_KEYOWNER_ZONE; + else if ((options & DST_TYPE_KEY) != 0) { /* KEY */ + if (strcasecmp(nametype, "host") == 0 || + strcasecmp(nametype, "entity") == 0) + flags |= DNS_KEYOWNER_ENTITY; + else if (strcasecmp(nametype, "user") == 0) + flags |= DNS_KEYOWNER_USER; + else + fatal("invalid KEY nametype %s", nametype); + } else if (strcasecmp(nametype, "other") != 0) /* DNSKEY */ + fatal("invalid DNSKEY nametype %s", nametype); + + rdclass = strtoclass(classname); + + if ((options & DST_TYPE_KEY) != 0) /* KEY */ + flags |= signatory; + else if ((flags & DNS_KEYOWNER_ZONE) != 0) /* DNSKEY */ + flags |= ksk; + + if (protocol == -1) + protocol = DNS_KEYPROTO_DNSSEC; + else if ((options & DST_TYPE_KEY) == 0 && + protocol != DNS_KEYPROTO_DNSSEC) + fatal("invalid DNSKEY protocol: %d", protocol); + + if ((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) { + if ((flags & DNS_KEYFLAG_SIGNATORYMASK) != 0) + fatal("specified null key with signing authority"); + } + + if ((flags & DNS_KEYFLAG_OWNERMASK) == DNS_KEYOWNER_ZONE && + alg == DNS_KEYALG_DH) + fatal("a key with algorithm '%s' cannot be a zone key", + algname); + + dns_fixedname_init(&fname); + name = dns_fixedname_name(&fname); + isc_buffer_init(&buf, argv[isc_commandline_index], + strlen(argv[isc_commandline_index])); + isc_buffer_add(&buf, strlen(argv[isc_commandline_index])); + ret = dns_name_fromtext(name, &buf, dns_rootname, ISC_FALSE, NULL); + if (ret != ISC_R_SUCCESS) + fatal("invalid key name %s: %s", argv[isc_commandline_index], + isc_result_totext(ret)); + + if ((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) + null_key = ISC_TRUE; + + isc_buffer_init(&buf, filename, sizeof(filename) - 1); + + /* associate the key */ + ret = dst_key_fromlabel(name, alg, flags, protocol, + rdclass, "", label, NULL, mctx, &key); + isc_entropy_stopcallbacksources(ectx); + + if (ret != ISC_R_SUCCESS) { + char namestr[DNS_NAME_FORMATSIZE]; + char algstr[ALG_FORMATSIZE]; + dns_name_format(name, namestr, sizeof(namestr)); + alg_format(alg, algstr, sizeof(algstr)); + fatal("failed to generate key %s/%s: %s\n", + namestr, algstr, isc_result_totext(ret)); + exit(-1); + } + + /* + * Try to read a key with the same name, alg and id from disk. + * If there is one we must continue generating a new one + * unless we were asked to generate a null key, in which + * case we return failure. + */ + ret = dst_key_fromfile(name, dst_key_id(key), alg, + DST_TYPE_PRIVATE, NULL, mctx, &oldkey); + /* do not overwrite an existing key */ + if (ret == ISC_R_SUCCESS) { + isc_buffer_clear(&buf); + ret = dst_key_buildfilename(key, 0, NULL, &buf); + fprintf(stderr, "%s: %s already exists\n", + program, filename); + dst_key_free(&key); + exit (1); + } + + ret = dst_key_tofile(key, options, NULL); + if (ret != ISC_R_SUCCESS) { + char keystr[KEY_FORMATSIZE]; + key_format(key, keystr, sizeof(keystr)); + fatal("failed to write key %s: %s\n", keystr, + isc_result_totext(ret)); + } + + isc_buffer_clear(&buf); + ret = dst_key_buildfilename(key, 0, NULL, &buf); + printf("%s\n", filename); + dst_key_free(&key); + + cleanup_logging(&log); + cleanup_entropy(&ectx); + dst_lib_destroy(); + dns_name_destroy(); + if (verbose > 10) + isc_mem_stats(mctx, stdout); + isc_mem_destroy(&mctx); + + return (0); +} |