Initial commitstart

1 files changed, 540 insertions, 0 deletions

diff --git a/bin/dnssec/dnssec-keygen.c b/bin/dnssec/dnssec-keygen.c
new file mode 100644
index 0000000..614d388
--- /dev/null
+++ b/bin/dnssec/dnssec-keygen.c
@@ -0,0 +1,540 @@
+/*
+ * Portions Copyright (C) 2004-2008  Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (C) 1999-2003  Internet Software Consortium.
+ *
+ * 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 AND NETWORK ASSOCIATES 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.
+ *
+ * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
+ *
+ * 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 AND NETWORK ASSOCIATES 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-keygen.c,v 1.81 2008/09/25 04:02:38 tbox 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-keygen";
+int verbose;
+
+static const char *algs = "RSA | RSAMD5 | DH | DSA | RSASHA1 | NSEC3DSA |"
+			  " NSEC3RSASHA1 | HMAC-MD5 |"
+			  " HMAC-SHA1 | HMAC-SHA224 | HMAC-SHA256 |"
+			  " HMAC-SHA384 | HMAC-SHA512";
+
+static isc_boolean_t
+dsa_size_ok(int size) {
+	return (ISC_TF(size >= 512 && size <= 1024 && size % 64 == 0));
+}
+
+static void
+usage(void) {
+	fprintf(stderr, "Usage:\n");
+	fprintf(stderr, "    %s -a alg -b bits [-n type] [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, "    -b key size, in bits:\n");
+	fprintf(stderr, "        RSAMD5:\t\t[512..%d]\n", MAX_RSA);
+	fprintf(stderr, "        RSASHA1:\t\t[512..%d]\n", MAX_RSA);
+	fprintf(stderr, "        NSEC3RSASHA1:\t\t[512..%d]\n", MAX_RSA);
+	fprintf(stderr, "        DH:\t\t[128..4096]\n");
+	fprintf(stderr, "        DSA:\t\t[512..1024] and divisible by 64\n");
+	fprintf(stderr, "        NSEC3DSA:\t\t[512..1024] and divisible by 64\n");
+	fprintf(stderr, "        HMAC-MD5:\t[1..512]\n");
+	fprintf(stderr, "        HMAC-SHA1:\t[1..160]\n");
+	fprintf(stderr, "        HMAC-SHA224:\t[1..224]\n");
+	fprintf(stderr, "        HMAC-SHA256:\t[1..256]\n");
+	fprintf(stderr, "        HMAC-SHA384:\t[1..384]\n");
+	fprintf(stderr, "        HMAC-SHA512:\t[1..512]\n");
+	fprintf(stderr, "    -n nametype: ZONE | HOST | ENTITY | USER | OTHER\n");
+	fprintf(stderr, "        (DNSKEY generation defaults to ZONE\n");
+	fprintf(stderr, "    name: owner of the key\n");
+	fprintf(stderr, "Other options:\n");
+	fprintf(stderr, "    -c <class> (default: IN)\n");
+	fprintf(stderr, "    -d <digest bits> (0 => max, default)\n");
+	fprintf(stderr, "    -e use large exponent (RSAMD5/RSASHA1 only)\n");
+	fprintf(stderr, "    -f keyflag: KSK\n");
+	fprintf(stderr, "    -g <generator> use specified generator "
+		"(DH only)\n");
+	fprintf(stderr, "    -t <type>: "
+		"AUTHCONF | NOAUTHCONF | NOAUTH | NOCONF "
+		"(default: AUTHCONF)\n");
+	fprintf(stderr, "    -p <protocol>: "
+	       "default: 3 [dnssec]\n");
+	fprintf(stderr, "    -s <strength> strength value this key signs DNS "
+		"records with (default: 0)\n");
+	fprintf(stderr, "    -r <randomdev>: a file containing random data\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	conflict = ISC_FALSE, null_key = ISC_FALSE;
+	isc_mem_t	*mctx = NULL;
+	int		ch, rsa_exp = 0, generator = 0, param = 0;
+	int		protocol = -1, size = -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;
+	int		dbits = 0;
+
+	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:b:c:d:ef:g:kn:t:p:s:r:v:h")) != -1)
+	{
+	    switch (ch) {
+		case 'a':
+			algname = isc_commandline_argument;
+			break;
+		case 'b':
+			size = strtol(isc_commandline_argument, &endp, 10);
+			if (*endp != '\0' || size < 0)
+				fatal("-b requires a non-negative number");
+			break;
+		case 'c':
+			classname = isc_commandline_argument;
+			break;
+		case 'd':
+			dbits = strtol(isc_commandline_argument, &endp, 10);
+			if (*endp != '\0' || dbits < 0)
+				fatal("-d requires a non-negative number");
+			break;
+		case 'e':
+			rsa_exp = 1;
+			break;
+		case 'f':
+			if (strcasecmp(isc_commandline_argument, "KSK") == 0)
+				ksk = DNS_KEYFLAG_KSK;
+			else
+				fatal("unknown flag '%s'",
+				      isc_commandline_argument);
+			break;
+		case 'g':
+			generator = strtol(isc_commandline_argument,
+					   &endp, 10);
+			if (*endp != '\0' || generator <= 0)
+				fatal("-g requires a positive number");
+			break;
+		case 'k':
+			options |= DST_TYPE_KEY;
+			break;
+		case 'n':
+			nametype = isc_commandline_argument;
+			break;
+		case 't':
+			type = 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 's':
+			signatory = strtol(isc_commandline_argument,
+					   &endp, 10);
+			if (*endp != '\0' || signatory < 0 || signatory > 15)
+				fatal("-s must be followed by a number "
+				      "[0..15]");
+			break;
+		case 'r':
+			setup_entropy(mctx, isc_commandline_argument, &ectx);
+			break;
+		case 'v':
+			endp = NULL;
+			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 (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 if (strcasecmp(algname, "HMAC-MD5") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACMD5;
+	} else if (strcasecmp(algname, "HMAC-SHA1") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACSHA1;
+	} else if (strcasecmp(algname, "HMAC-SHA224") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACSHA224;
+	} else if (strcasecmp(algname, "HMAC-SHA256") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACSHA256;
+	} else if (strcasecmp(algname, "HMAC-SHA384") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACSHA384;
+	} else if (strcasecmp(algname, "HMAC-SHA512") == 0) {
+		options |= DST_TYPE_KEY;
+		alg = DST_ALG_HMACSHA512;
+	} 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);
+			if (size < 0)
+				size = 0;
+		}
+		else if (strcasecmp(type, "AUTHCONF") == 0)
+			/* nothing */;
+		else
+			fatal("invalid type %s", type);
+	}
+
+	if (size < 0)
+		fatal("key size not specified (-b option)");
+
+	switch (alg) {
+	case DNS_KEYALG_RSAMD5:
+	case DNS_KEYALG_RSASHA1:
+	case DNS_KEYALG_NSEC3RSASHA1:
+		if (size != 0 && (size < 512 || size > MAX_RSA))
+			fatal("RSA key size %d out of range", size);
+		break;
+	case DNS_KEYALG_DH:
+		if (size != 0 && (size < 128 || size > 4096))
+			fatal("DH key size %d out of range", size);
+		break;
+	case DNS_KEYALG_DSA:
+	case DNS_KEYALG_NSEC3DSA:
+		if (size != 0 && !dsa_size_ok(size))
+			fatal("invalid DSS key size: %d", size);
+		break;
+	case DST_ALG_HMACMD5:
+		if (size < 1 || size > 512)
+			fatal("HMAC-MD5 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 80 || dbits > 128))
+			fatal("HMAC-MD5 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-MD5 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	case DST_ALG_HMACSHA1:
+		if (size < 1 || size > 160)
+			fatal("HMAC-SHA1 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 80 || dbits > 160))
+			fatal("HMAC-SHA1 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-SHA1 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	case DST_ALG_HMACSHA224:
+		if (size < 1 || size > 224)
+			fatal("HMAC-SHA224 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 112 || dbits > 224))
+			fatal("HMAC-SHA224 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-SHA224 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	case DST_ALG_HMACSHA256:
+		if (size < 1 || size > 256)
+			fatal("HMAC-SHA256 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 128 || dbits > 256))
+			fatal("HMAC-SHA256 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-SHA256 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	case DST_ALG_HMACSHA384:
+		if (size < 1 || size > 384)
+			fatal("HMAC-384 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 192 || dbits > 384))
+			fatal("HMAC-SHA384 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-SHA384 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	case DST_ALG_HMACSHA512:
+		if (size < 1 || size > 512)
+			fatal("HMAC-SHA512 key size %d out of range", size);
+		if (dbits != 0 && (dbits < 256 || dbits > 512))
+			fatal("HMAC-SHA512 digest bits %d out of range", dbits);
+		if ((dbits % 8) != 0)
+			fatal("HMAC-SHA512 digest bits %d not divisible by 8",
+			      dbits);
+		break;
+	}
+
+	if (!(alg == DNS_KEYALG_RSAMD5 || alg == DNS_KEYALG_RSASHA1 ||
+	      alg == DNS_KEYALG_NSEC3RSASHA1) && rsa_exp != 0)
+		fatal("specified RSA exponent for a non-RSA key");
+
+	if (alg != DNS_KEYALG_DH && generator != 0)
+		fatal("specified DH generator for a non-DH key");
+
+	if (nametype == NULL) {
+		if ((options & DST_TYPE_KEY) != 0) /* KEY / HMAC */
+			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 / HMAC */
+		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 / HMAC */
+		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 (size > 0)
+			fatal("specified null key with non-zero size");
+		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 || alg == DST_ALG_HMACMD5 ||
+	     alg == DST_ALG_HMACSHA1 || alg == DST_ALG_HMACSHA224 ||
+	     alg == DST_ALG_HMACSHA256 || alg == DST_ALG_HMACSHA384 ||
+	     alg == DST_ALG_HMACSHA512))
+		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));
+
+	switch(alg) {
+	case DNS_KEYALG_RSAMD5:
+	case DNS_KEYALG_RSASHA1:
+		param = rsa_exp;
+		break;
+	case DNS_KEYALG_DH:
+		param = generator;
+		break;
+	case DNS_KEYALG_DSA:
+	case DST_ALG_HMACMD5:
+	case DST_ALG_HMACSHA1:
+	case DST_ALG_HMACSHA224:
+	case DST_ALG_HMACSHA256:
+	case DST_ALG_HMACSHA384:
+	case DST_ALG_HMACSHA512:
+		param = 0;
+		break;
+	}
+
+	if ((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY)
+		null_key = ISC_TRUE;
+
+	isc_buffer_init(&buf, filename, sizeof(filename) - 1);
+
+	do {
+		conflict = ISC_FALSE;
+		oldkey = NULL;
+
+		/* generate the key */
+		ret = dst_key_generate(name, alg, size, param, flags, protocol,
+				       rdclass, 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);
+		}
+
+		dst_key_setbits(key, dbits);
+
+		/*
+		 * 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) {
+			dst_key_free(&oldkey);
+			conflict = ISC_TRUE;
+			if (null_key)
+				break;
+		}
+		if (conflict == ISC_TRUE) {
+			if (verbose > 0) {
+				isc_buffer_clear(&buf);
+				ret = dst_key_buildfilename(key, 0, NULL, &buf);
+				fprintf(stderr,
+					"%s: %s already exists, "
+					"generating a new key\n",
+					program, filename);
+			}
+			dst_key_free(&key);
+		}
+
+	} while (conflict == ISC_TRUE);
+
+	if (conflict)
+		fatal("cannot generate a null key when a key with id 0 "
+		      "already exists");
+
+	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);
+}