static void
generate(int alg, isc_mem_t *mctx) {
isc_result_t ret;
dst_key_t *key = NULL;
ret = dst_key_generate(dns_rootname, alg, 512, 0, 0, 0,
dns_rdataclass_in, mctx, &key);
printf("generate(%d) returned: %s\n", alg, isc_result_totext(ret));
if (ret != ISC_R_SUCCESS)
return;
if (alg != DST_ALG_DH)
use(key, mctx);
dst_key_free(&key);
}
/*%
* Generate a key of size 'keysize' using entropy source 'randomfile',
* and place it in 'key_txtbuffer'
*/
void
generate_key(isc_mem_t *mctx, const char *randomfile, dns_secalg_t alg,
int keysize, isc_buffer_t *key_txtbuffer) {
isc_result_t result = ISC_R_SUCCESS;
isc_entropysource_t *entropy_source = NULL;
int open_keyboard = ISC_ENTROPY_KEYBOARDMAYBE;
int entropy_flags = 0;
isc_entropy_t *ectx = NULL;
isc_buffer_t key_rawbuffer;
isc_region_t key_rawregion;
char key_rawsecret[64];
dst_key_t *key = NULL;
switch (alg) {
case DST_ALG_HMACMD5:
case DST_ALG_HMACSHA1:
case DST_ALG_HMACSHA224:
case DST_ALG_HMACSHA256:
if (keysize < 1 || keysize > 512)
fatal("keysize %d out of range (must be 1-512)\n",
keysize);
break;
case DST_ALG_HMACSHA384:
case DST_ALG_HMACSHA512:
if (keysize < 1 || keysize > 1024)
fatal("keysize %d out of range (must be 1-1024)\n",
keysize);
break;
default:
fatal("unsupported algorithm %d\n", alg);
}
DO("create entropy context", isc_entropy_create(mctx, &ectx));
if (randomfile != NULL && strcmp(randomfile, "keyboard") == 0) {
randomfile = NULL;
open_keyboard = ISC_ENTROPY_KEYBOARDYES;
}
DO("start entropy source", isc_entropy_usebestsource(ectx,
&entropy_source,
randomfile,
open_keyboard));
entropy_flags = ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY;
DO("initialize dst library", dst_lib_init(mctx, ectx, entropy_flags));
DO("generate key", dst_key_generate(dns_rootname, alg,
keysize, 0, 0,
DNS_KEYPROTO_ANY,
dns_rdataclass_in, mctx, &key));
isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
DO("dump key to buffer", dst_key_tobuffer(key, &key_rawbuffer));
isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
DO("bsse64 encode secret", isc_base64_totext(&key_rawregion, -1, "",
key_txtbuffer));
/*
* Shut down the entropy source now so the "stop typing" message
* does not muck with the output.
*/
if (entropy_source != NULL)
isc_entropy_destroysource(&entropy_source);
if (key != NULL)
dst_key_free(&key);
isc_entropy_detach(&ectx);
dst_lib_destroy();
}
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:
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:
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) &&
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);
}
int
main(int argc, char **argv) {
isc_boolean_t show_final_mem = ISC_FALSE;
isc_buffer_t key_rawbuffer;
isc_buffer_t key_txtbuffer;
isc_region_t key_rawregion;
isc_mem_t *mctx = NULL;
isc_entropy_t *ectx = NULL;
isc_entropysource_t *entropy_source = NULL;
isc_result_t result = ISC_R_SUCCESS;
dst_key_t *key = NULL;
const char *keyname = NULL;
const char *randomfile = NULL;
const char *serveraddr = NULL;
char key_rawsecret[64];
char key_txtsecret[256];
char *p;
int ch;
int port;
int keysize;
int entropy_flags = 0;
int open_keyboard = ISC_ENTROPY_KEYBOARDMAYBE;
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;
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 '?':
usage(1);
break;
default:
fatal("unexpected error parsing command arguments: "
"got %c\n", ch);
break;
}
}
argc -= isc_commandline_index;
argv += isc_commandline_index;
if (argc > 0)
usage(1);
DO("create memory context", isc_mem_create(0, 0, &mctx));
DO("create entropy context", isc_entropy_create(mctx, &ectx));
if (randomfile != NULL && strcmp(randomfile, "keyboard") == 0) {
randomfile = NULL;
open_keyboard = ISC_ENTROPY_KEYBOARDYES;
}
DO("start entropy source", isc_entropy_usebestsource(ectx,
&entropy_source,
randomfile,
open_keyboard));
entropy_flags = ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY;
DO("initialize dst library", dst_lib_init(mctx, ectx, entropy_flags));
DO("generate key", dst_key_generate(dns_rootname, DST_ALG_HMACMD5,
keysize, 0, 0,
DNS_KEYPROTO_ANY,
dns_rdataclass_in, mctx, &key));
isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
DO("dump key to buffer", dst_key_tobuffer(key, &key_rawbuffer));
isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
DO("bsse64 encode secret", isc_base64_totext(&key_rawregion, -1, "",
&key_txtbuffer));
/*
* Shut down the entropy source now so the "stop typing" message
* does not muck with the output.
*/
if (entropy_source != NULL)
isc_entropy_destroysource(&entropy_source);
if (key != NULL)
dst_key_free(&key);
isc_entropy_detach(&ectx);
dst_lib_destroy();
if (keyonly) {
write_key_file(keyfile, chrootdir == NULL ? user : NULL,
keyname, &key_txtbuffer);
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);
isc_mem_put(mctx, buf, len);
}
} else {
printf("\
# Start of rndc.conf\n\
key \"%s\" {\n\
algorithm hmac-md5;\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 hmac-md5;\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,
(int)isc_buffer_usedlength(&key_txtbuffer),
(char *)isc_buffer_base(&key_txtbuffer),
keyname, serveraddr, port,
keyname,
(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);
}
