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/*
* Copyright (C) 2004, 2005, 2007-2009, 2011 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2001, 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 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: rndc-confgen.c,v 1.5.308.2 2011/03/12 04:59:13 tbox Exp $ */
/*! \file */
/**
* rndc-confgen generates configuration files for rndc. It can be used
* as a convenient alternative to writing the rndc.conf file and the
* corresponding controls and key statements in named.conf by hand.
* Alternatively, it can be run with the -a option to set up a
* rndc.key file and avoid the need for a rndc.conf file and a
* controls statement altogether.
*/
#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_KEYLENGTH 128 /*% Bits. */
#define DEFAULT_KEYNAME "rndc-key"
#define DEFAULT_SERVER "127.0.0.1"
#define DEFAULT_PORT 953
static char program[256];
const char *progname;
isc_boolean_t verbose = ISC_FALSE;
const char *keyfile, *keydef;
ISC_PLATFORM_NORETURN_PRE static void
usage(int status) ISC_PLATFORM_NORETURN_POST;
static void
usage(int status) {
fprintf(stderr, "\
Usage:\n\
%s [-a] [-b bits] [-c keyfile] [-k keyname] [-p port] [-r randomfile] \
[-s addr] [-t chrootdir] [-u user]\n\
-a: generate just the key clause and write it to keyfile (%s)\n\
-b bits: from 1 through 512, default %d; total length of the secret\n\
-c keyfile: specify an alternate key file (requires -a)\n\
-k keyname: the name as it will be used in named.conf and rndc.conf\n\
-p port: the port named will listen on and rndc will connect to\n\
-r randomfile: source of random data (use \"keyboard\" for key timing)\n\
-s addr: the address to which rndc should connect\n\
-t chrootdir: write a keyfile in chrootdir as well (requires -a)\n\
-u user: set the keyfile owner to \"user\" (requires -a)\n",
progname, keydef, DEFAULT_KEYLENGTH);
exit (status);
}
int
main(int argc, char **argv) {
isc_boolean_t show_final_mem = 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 *keyname = NULL;
const char *randomfile = NULL;
const char *serveraddr = NULL;
dns_secalg_t alg = DST_ALG_HMACMD5;
const char *algname = alg_totext(alg);
char *p;
int ch;
int port;
int keysize;
struct in_addr addr4_dummy;
struct in6_addr addr6_dummy;
char *chrootdir = NULL;
char *user = NULL;
isc_boolean_t keyonly = ISC_FALSE;
int len;
keydef = keyfile = RNDC_KEYFILE;
result = isc_file_progname(*argv, program, sizeof(program));
if (result != ISC_R_SUCCESS)
memcpy(program, "rndc-confgen", 13);
progname = program;
keyname = DEFAULT_KEYNAME;
keysize = DEFAULT_KEYLENGTH;
serveraddr = DEFAULT_SERVER;
port = DEFAULT_PORT;
isc_commandline_errprint = ISC_FALSE;
while ((ch = isc_commandline_parse(argc, argv,
"ab:c:hk:Mmp:r:s:t:u:Vy")) != -1) {
switch (ch) {
case 'a':
keyonly = ISC_TRUE;
break;
case 'b':
keysize = strtol(isc_commandline_argument, &p, 10);
if (*p != '\0' || keysize < 0)
fatal("-b requires a non-negative number");
if (keysize < 1 || keysize > 512)
fatal("-b must be in the range 1 through 512");
break;
case 'c':
keyfile = isc_commandline_argument;
break;
case 'h':
usage(0);
case 'k':
case 'y': /* Compatible with rndc -y. */
keyname = isc_commandline_argument;
break;
case 'M':
isc_mem_debugging = ISC_MEM_DEBUGTRACE;
break;
case 'm':
show_final_mem = ISC_TRUE;
break;
case 'p':
port = strtol(isc_commandline_argument, &p, 10);
if (*p != '\0' || port < 0 || port > 65535)
fatal("port '%s' out of range",
isc_commandline_argument);
break;
case 'r':
randomfile = isc_commandline_argument;
break;
case 's':
serveraddr = isc_commandline_argument;
if (inet_pton(AF_INET, serveraddr, &addr4_dummy) != 1 &&
inet_pton(AF_INET6, serveraddr, &addr6_dummy) != 1)
fatal("-s should be an IPv4 or IPv6 address");
break;
case 't':
chrootdir = isc_commandline_argument;
break;
case 'u':
user = isc_commandline_argument;
break;
case 'V':
verbose = ISC_TRUE;
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;
POST(argv);
if (argc > 0)
usage(1);
DO("create memory context", isc_mem_create(0, 0, &mctx));
isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
generate_key(mctx, randomfile, alg, keysize, &key_txtbuffer);
if (keyonly) {
write_key_file(keyfile, chrootdir == NULL ? user : NULL,
keyname, &key_txtbuffer, alg);
if (chrootdir != NULL) {
char *buf;
len = strlen(chrootdir) + strlen(keyfile) + 2;
buf = isc_mem_get(mctx, len);
if (buf == NULL)
fatal("isc_mem_get(%d) failed\n", len);
snprintf(buf, len, "%s%s%s", chrootdir,
(*keyfile != '/') ? "/" : "", keyfile);
write_key_file(buf, user, keyname, &key_txtbuffer, alg);
isc_mem_put(mctx, buf, len);
}
} else {
printf("\
# Start of rndc.conf\n\
key \"%s\" {\n\
algorithm %s;\n\
secret \"%.*s\";\n\
};\n\
\n\
options {\n\
default-key \"%s\";\n\
default-server %s;\n\
default-port %d;\n\
};\n\
# End of rndc.conf\n\
\n\
# Use with the following in named.conf, adjusting the allow list as needed:\n\
# key \"%s\" {\n\
# algorithm %s;\n\
# secret \"%.*s\";\n\
# };\n\
# \n\
# controls {\n\
# inet %s port %d\n\
# allow { %s; } keys { \"%s\"; };\n\
# };\n\
# End of named.conf\n",
keyname, algname,
(int)isc_buffer_usedlength(&key_txtbuffer),
(char *)isc_buffer_base(&key_txtbuffer),
keyname, serveraddr, port,
keyname, algname,
(int)isc_buffer_usedlength(&key_txtbuffer),
(char *)isc_buffer_base(&key_txtbuffer),
serveraddr, port, serveraddr, keyname);
}
if (show_final_mem)
isc_mem_stats(mctx, stderr);
isc_mem_destroy(&mctx);
return (0);
}
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