--- /dev/null
+/*
+ * Copyright (C) 2009 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: ddns-confgen.c,v 1.9 2009/09/29 15:06:05 fdupont Exp $ */
+
+/*! \file */
+
+/**
+ * ddns-confgen generates configuration files for dynamic DNS. It can
+ * be used as a convenient alternative to writing the ddns.key file
+ * and the corresponding key and update-policy statements in named.conf.
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include <isc/assertions.h>
+#include <isc/base64.h>
+#include <isc/buffer.h>
+#include <isc/commandline.h>
+#include <isc/entropy.h>
+#include <isc/file.h>
+#include <isc/keyboard.h>
+#include <isc/mem.h>
+#include <isc/net.h>
+#include <isc/print.h>
+#include <isc/result.h>
+#include <isc/string.h>
+#include <isc/time.h>
+#include <isc/util.h>
+
+#include <dns/keyvalues.h>
+#include <dns/name.h>
+
+#include <dst/dst.h>
+#include <confgen/os.h>
+
+#include "util.h"
+#include "keygen.h"
+
+#define DEFAULT_KEYNAME "ddns-key"
+
+static char program[256];
+const char *progname;
+
+isc_boolean_t verbose = ISC_FALSE;
+
+ISC_PLATFORM_NORETURN_PRE static void
+usage(int status) ISC_PLATFORM_NORETURN_POST;
+
+static void
+usage(int status) {
+
+ fprintf(stderr, "\
+Usage:\n\
+ %s [-a alg] [-k keyname] [-r randomfile] [-q] [-s name | -z zone]\n\
+ -a alg: algorithm (default hmac-sha256)\n\
+ -k keyname: name of the key as it will be used in named.conf\n\
+ -r randomfile: source of random data (use \"keyboard\" for key timing)\n\
+ -s name: domain name to be updated using the created key\n\
+ -z zone: name of the zone as it will be used in named.conf\n\
+ -q: quiet mode: print the key, with no explanatory text\n",
+ progname);
+
+ exit (status);
+}
+
+int
+main(int argc, char **argv) {
+ isc_boolean_t show_final_mem = ISC_FALSE;
+ isc_boolean_t quiet = ISC_FALSE;
+ isc_buffer_t key_txtbuffer;
+ char key_txtsecret[256];
+ isc_mem_t *mctx = NULL;
+ isc_result_t result = ISC_R_SUCCESS;
+ const char *randomfile = NULL;
+ const char *keyname = NULL;
+ const char *zone = NULL;
+ const char *self_domain = NULL;
+ char *keybuf = NULL;
+ dns_secalg_t alg = DST_ALG_HMACSHA256;
+ const char *algname = alg_totext(alg);
+ int keysize = 256;
+ int len = 0;
+ int ch;
+
+ result = isc_file_progname(*argv, program, sizeof(program));
+ if (result != ISC_R_SUCCESS)
+ memcpy(program, "ddns-confgen", 13);
+ progname = program;
+
+ isc_commandline_errprint = ISC_FALSE;
+
+ while ((ch = isc_commandline_parse(argc, argv,
+ "a:hk:Mmr:qs:Vy:z:")) != -1) {
+ switch (ch) {
+ case 'a':
+ algname = isc_commandline_argument;
+ alg = alg_fromtext(algname);
+ if (alg == DST_ALG_UNKNOWN)
+ fatal("Unsupported algorithm '%s'", algname);
+ keysize = alg_bits(alg);
+ break;
+ case 'h':
+ usage(0);
+ case 'k':
+ case 'y':
+ keyname = isc_commandline_argument;
+ break;
+ case 'M':
+ isc_mem_debugging = ISC_MEM_DEBUGTRACE;
+ break;
+ case 'm':
+ show_final_mem = ISC_TRUE;
+ break;
+ case 'q':
+ quiet = ISC_TRUE;
+ break;
+ case 'r':
+ randomfile = isc_commandline_argument;
+ break;
+ case 's':
+ self_domain = isc_commandline_argument;
+ break;
+ case 'V':
+ verbose = ISC_TRUE;
+ break;
+ case 'z':
+ zone = isc_commandline_argument;
+ break;
+ case '?':
+ if (isc_commandline_option != '?') {
+ fprintf(stderr, "%s: invalid argument -%c\n",
+ program, isc_commandline_option);
+ usage(1);
+ } else
+ usage(0);
+ break;
+ default:
+ fprintf(stderr, "%s: unhandled option -%c\n",
+ program, isc_commandline_option);
+ exit(1);
+ }
+ }
+
+ argc -= isc_commandline_index;
+ argv += isc_commandline_index;
+
+ if (self_domain != NULL && zone != NULL)
+ usage(1); /* -s and -z cannot coexist */
+
+ if (argc > 0)
+ usage(1);
+
+ DO("create memory context", isc_mem_create(0, 0, &mctx));
+
+ if (keyname == NULL) {
+ const char *suffix = NULL;
+
+ keyname = DEFAULT_KEYNAME;
+ if (self_domain != NULL)
+ suffix = self_domain;
+ else if (zone != NULL)
+ suffix = zone;
+ if (suffix != NULL) {
+ len = strlen(keyname) + strlen(suffix) + 2;
+ keybuf = isc_mem_get(mctx, len);
+ if (keybuf == NULL)
+ fatal("failed to allocate memory for keyname");
+ snprintf(keybuf, len, "%s.%s", keyname, suffix);
+ keyname = (const char *) keybuf;
+ }
+ }
+
+ isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
+
+ generate_key(mctx, randomfile, alg, keysize, &key_txtbuffer);
+
+
+ if (!quiet)
+ printf("\
+# To activate this key, place the following in named.conf, and\n\
+# in a separate keyfile on the system or systems from which nsupdate\n\
+# will be run:\n");
+
+ printf("\
+key \"%s\" {\n\
+ algorithm %s;\n\
+ secret \"%.*s\";\n\
+};\n",
+ keyname, algname,
+ (int)isc_buffer_usedlength(&key_txtbuffer),
+ (char *)isc_buffer_base(&key_txtbuffer));
+
+ if (!quiet) {
+ if (self_domain != NULL) {
+ printf("\n\
+# Then, in the \"zone\" statement for the zone containing the\n\
+# name \"%s\", place an \"update-policy\" statement\n\
+# like this one, adjusted as needed for your preferred permissions:\n\
+update-policy {\n\
+ grant %s name %s ANY;\n\
+};\n",
+ self_domain, keyname, self_domain);
+ } else if (zone != NULL) {
+ printf("\n\
+# Then, in the \"zone\" definition statement for \"%s\",\n\
+# place an \"update-policy\" statement like this one, adjusted as \n\
+# needed for your preferred permissions:\n\
+update-policy {\n\
+ grant %s zonesub ANY;\n\
+};\n",
+ zone, keyname);
+ } else {
+ printf("\n\
+# Then, in the \"zone\" statement for each zone you wish to dynamically\n\
+# update, place an \"update-policy\" statement granting update permission\n\
+# to this key. For example, the following statement grants this key\n\
+# permission to update any name within the zone:\n\
+update-policy {\n\
+ grant %s zonesub ANY;\n\
+};\n",
+ keyname);
+ }
+
+ printf("\n\
+# After the keyfile has been placed, the following command will\n\
+# execute nsupdate using this key:\n\
+nsupdate -k <keyfile>\n");
+
+ }
+
+ if (keybuf != NULL)
+ isc_mem_put(mctx, keybuf, len);
+
+ if (show_final_mem)
+ isc_mem_stats(mctx, stderr);
+
+ isc_mem_destroy(&mctx);
+
+ return (0);
+}
git.samba.org / tridge / bind9.git / blobdiff