dst_api.c revision af20baa9600965efaa6ad1abdba53b0902e84b8d
823N/A/*
823N/A * Portions Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
823N/A * Portions Copyright (C) 1999-2003 Internet Software Consortium.
823N/A *
823N/A * Permission to use, copy, modify, and/or distribute this software for any
823N/A * purpose with or without fee is hereby granted, provided that the above
823N/A * copyright notice and this permission notice appear in all copies.
823N/A *
823N/A * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
823N/A * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
823N/A * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
823N/A * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
823N/A * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
823N/A * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
823N/A * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
823N/A *
823N/A * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
823N/A *
873N/A * Permission to use, copy, modify, and/or distribute this software for any
823N/A * purpose with or without fee is hereby granted, provided that the above
823N/A * copyright notice and this permission notice appear in all copies.
823N/A *
823N/A * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
823N/A * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
823N/A * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
823N/A * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
823N/A * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
823N/A * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
823N/A * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
823N/A */
823N/A
823N/A/*
823N/A * Principal Author: Brian Wellington
897N/A * $Id: dst_api.c,v 1.37 2009/10/12 05:50:52 marka Exp $
823N/A */
823N/A
823N/A/*! \file */
823N/A
823N/A#include <config.h>
823N/A
823N/A#include <stdlib.h>
823N/A
823N/A#include <isc/buffer.h>
823N/A#include <isc/dir.h>
823N/A#include <isc/entropy.h>
823N/A#include <isc/fsaccess.h>
823N/A#include <isc/hmacsha.h>
823N/A#include <isc/lex.h>
823N/A#include <isc/mem.h>
823N/A#include <isc/once.h>
897N/A#include <isc/print.h>
823N/A#include <isc/random.h>
823N/A#include <isc/string.h>
823N/A#include <isc/time.h>
823N/A#include <isc/util.h>
823N/A
823N/A#include <dns/fixedname.h>
823N/A#include <dns/keyvalues.h>
823N/A#include <dns/name.h>
823N/A#include <dns/rdata.h>
823N/A#include <dns/rdataclass.h>
823N/A#include <dns/ttl.h>
823N/A#include <dns/types.h>
823N/A
823N/A#include <dst/result.h>
823N/A
823N/A#include "dst_internal.h"
823N/A
823N/A#define DST_AS_STR(t) ((t).value.as_textregion.base)
823N/A
823N/Astatic dst_func_t *dst_t_func[DST_MAX_ALGS];
823N/A#ifdef BIND9
823N/Astatic isc_entropy_t *dst_entropy_pool = NULL;
823N/A#endif
823N/Astatic unsigned int dst_entropy_flags = 0;
823N/Astatic isc_boolean_t dst_initialized = ISC_FALSE;
823N/A
823N/Avoid gss_log(int level, const char *fmt, ...) ISC_FORMAT_PRINTF(2, 3);
823N/A
823N/Aisc_mem_t *dst__memory_pool = NULL;
823N/A
823N/A/*
823N/A * Static functions.
823N/A */
823N/Astatic dst_key_t * get_key_struct(dns_name_t *name,
823N/A unsigned int alg,
823N/A unsigned int flags,
823N/A unsigned int protocol,
823N/A unsigned int bits,
823N/A dns_rdataclass_t rdclass,
823N/A isc_mem_t *mctx);
static isc_result_t write_public_key(const dst_key_t *key, int type,
const char *directory);
static isc_result_t buildfilename(dns_name_t *name,
dns_keytag_t id,
unsigned int alg,
unsigned int type,
const char *directory,
isc_buffer_t *out);
static isc_result_t computeid(dst_key_t *key);
static isc_result_t frombuffer(dns_name_t *name,
unsigned int alg,
unsigned int flags,
unsigned int protocol,
dns_rdataclass_t rdclass,
isc_buffer_t *source,
isc_mem_t *mctx,
dst_key_t **keyp);
static isc_result_t algorithm_status(unsigned int alg);
static isc_result_t addsuffix(char *filename, int len,
const char *dirname, const char *ofilename,
const char *suffix);
#define RETERR(x) \
do { \
result = (x); \
if (result != ISC_R_SUCCESS) \
goto out; \
} while (0)
#define CHECKALG(alg) \
do { \
isc_result_t _r; \
_r = algorithm_status(alg); \
if (_r != ISC_R_SUCCESS) \
return (_r); \
} while (0); \
#if defined(OPENSSL) && defined(BIND9)
static void *
default_memalloc(void *arg, size_t size) {
UNUSED(arg);
if (size == 0U)
size = 1;
return (malloc(size));
}
static void
default_memfree(void *arg, void *ptr) {
UNUSED(arg);
free(ptr);
}
#endif
isc_result_t
dst_lib_init(isc_mem_t *mctx, isc_entropy_t *ectx, unsigned int eflags) {
return (dst_lib_init2(mctx, ectx, NULL, eflags));
}
isc_result_t
dst_lib_init2(isc_mem_t *mctx, isc_entropy_t *ectx,
const char *engine, unsigned int eflags) {
isc_result_t result;
REQUIRE(mctx != NULL);
#ifdef BIND9
REQUIRE(ectx != NULL);
#else
UNUSED(ectx);
#endif
REQUIRE(dst_initialized == ISC_FALSE);
dst__memory_pool = NULL;
#if defined(OPENSSL) && defined(BIND9)
UNUSED(mctx);
/*
* When using --with-openssl, there seems to be no good way of not
* leaking memory due to the openssl error handling mechanism.
* Avoid assertions by using a local memory context and not checking
* for leaks on exit. Note: as there are leaks we cannot use
* ISC_MEMFLAG_INTERNAL as it will free up memory still being used
* by libcrypto.
*/
result = isc_mem_createx2(0, 0, default_memalloc, default_memfree,
NULL, &dst__memory_pool, 0);
if (result != ISC_R_SUCCESS)
return (result);
isc_mem_setname(dst__memory_pool, "dst", NULL);
#ifndef OPENSSL_LEAKS
isc_mem_setdestroycheck(dst__memory_pool, ISC_FALSE);
#endif
#else
isc_mem_attach(mctx, &dst__memory_pool);
#endif
#ifdef BIND9
isc_entropy_attach(ectx, &dst_entropy_pool);
#endif
dst_entropy_flags = eflags;
dst_result_register();
memset(dst_t_func, 0, sizeof(dst_t_func));
RETERR(dst__hmacmd5_init(&dst_t_func[DST_ALG_HMACMD5]));
RETERR(dst__hmacsha1_init(&dst_t_func[DST_ALG_HMACSHA1]));
RETERR(dst__hmacsha224_init(&dst_t_func[DST_ALG_HMACSHA224]));
RETERR(dst__hmacsha256_init(&dst_t_func[DST_ALG_HMACSHA256]));
RETERR(dst__hmacsha384_init(&dst_t_func[DST_ALG_HMACSHA384]));
RETERR(dst__hmacsha512_init(&dst_t_func[DST_ALG_HMACSHA512]));
#ifdef OPENSSL
RETERR(dst__openssl_init(engine));
RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSAMD5]));
RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSASHA1]));
RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_NSEC3RSASHA1]));
#ifdef HAVE_OPENSSL_DSA
RETERR(dst__openssldsa_init(&dst_t_func[DST_ALG_DSA]));
RETERR(dst__openssldsa_init(&dst_t_func[DST_ALG_NSEC3DSA]));
#endif
RETERR(dst__openssldh_init(&dst_t_func[DST_ALG_DH]));
#endif /* OPENSSL */
#ifdef GSSAPI
RETERR(dst__gssapi_init(&dst_t_func[DST_ALG_GSSAPI]));
#endif
dst_initialized = ISC_TRUE;
return (ISC_R_SUCCESS);
out:
/* avoid immediate crash! */
dst_initialized = ISC_TRUE;
dst_lib_destroy();
return (result);
}
void
dst_lib_destroy(void) {
int i;
RUNTIME_CHECK(dst_initialized == ISC_TRUE);
dst_initialized = ISC_FALSE;
for (i = 0; i < DST_MAX_ALGS; i++)
if (dst_t_func[i] != NULL && dst_t_func[i]->cleanup != NULL)
dst_t_func[i]->cleanup();
#ifdef OPENSSL
dst__openssl_destroy();
#endif
if (dst__memory_pool != NULL)
isc_mem_detach(&dst__memory_pool);
#ifdef BIND9
if (dst_entropy_pool != NULL)
isc_entropy_detach(&dst_entropy_pool);
#endif
}
isc_boolean_t
dst_algorithm_supported(unsigned int alg) {
REQUIRE(dst_initialized == ISC_TRUE);
if (alg >= DST_MAX_ALGS || dst_t_func[alg] == NULL)
return (ISC_FALSE);
return (ISC_TRUE);
}
isc_result_t
dst_context_create(dst_key_t *key, isc_mem_t *mctx, dst_context_t **dctxp) {
dst_context_t *dctx;
isc_result_t result;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(mctx != NULL);
REQUIRE(dctxp != NULL && *dctxp == NULL);
if (key->func->createctx == NULL)
return (DST_R_UNSUPPORTEDALG);
if (key->keydata.generic == NULL)
return (DST_R_NULLKEY);
dctx = isc_mem_get(mctx, sizeof(dst_context_t));
if (dctx == NULL)
return (ISC_R_NOMEMORY);
dctx->key = key;
dctx->mctx = mctx;
result = key->func->createctx(key, dctx);
if (result != ISC_R_SUCCESS) {
isc_mem_put(mctx, dctx, sizeof(dst_context_t));
return (result);
}
dctx->magic = CTX_MAGIC;
*dctxp = dctx;
return (ISC_R_SUCCESS);
}
void
dst_context_destroy(dst_context_t **dctxp) {
dst_context_t *dctx;
REQUIRE(dctxp != NULL && VALID_CTX(*dctxp));
dctx = *dctxp;
INSIST(dctx->key->func->destroyctx != NULL);
dctx->key->func->destroyctx(dctx);
dctx->magic = 0;
isc_mem_put(dctx->mctx, dctx, sizeof(dst_context_t));
*dctxp = NULL;
}
isc_result_t
dst_context_adddata(dst_context_t *dctx, const isc_region_t *data) {
REQUIRE(VALID_CTX(dctx));
REQUIRE(data != NULL);
INSIST(dctx->key->func->adddata != NULL);
return (dctx->key->func->adddata(dctx, data));
}
isc_result_t
dst_context_sign(dst_context_t *dctx, isc_buffer_t *sig) {
dst_key_t *key;
REQUIRE(VALID_CTX(dctx));
REQUIRE(sig != NULL);
key = dctx->key;
CHECKALG(key->key_alg);
if (key->keydata.generic == NULL)
return (DST_R_NULLKEY);
if (key->func->sign == NULL)
return (DST_R_NOTPRIVATEKEY);
if (key->func->isprivate == NULL ||
key->func->isprivate(key) == ISC_FALSE)
return (DST_R_NOTPRIVATEKEY);
return (key->func->sign(dctx, sig));
}
isc_result_t
dst_context_verify(dst_context_t *dctx, isc_region_t *sig) {
REQUIRE(VALID_CTX(dctx));
REQUIRE(sig != NULL);
CHECKALG(dctx->key->key_alg);
if (dctx->key->keydata.generic == NULL)
return (DST_R_NULLKEY);
if (dctx->key->func->verify == NULL)
return (DST_R_NOTPUBLICKEY);
return (dctx->key->func->verify(dctx, sig));
}
isc_result_t
dst_key_computesecret(const dst_key_t *pub, const dst_key_t *priv,
isc_buffer_t *secret)
{
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(pub) && VALID_KEY(priv));
REQUIRE(secret != NULL);
CHECKALG(pub->key_alg);
CHECKALG(priv->key_alg);
if (pub->keydata.generic == NULL || priv->keydata.generic == NULL)
return (DST_R_NULLKEY);
if (pub->key_alg != priv->key_alg ||
pub->func->computesecret == NULL ||
priv->func->computesecret == NULL)
return (DST_R_KEYCANNOTCOMPUTESECRET);
if (dst_key_isprivate(priv) == ISC_FALSE)
return (DST_R_NOTPRIVATEKEY);
return (pub->func->computesecret(pub, priv, secret));
}
isc_result_t
dst_key_tofile(const dst_key_t *key, int type, const char *directory) {
isc_result_t ret = ISC_R_SUCCESS;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
CHECKALG(key->key_alg);
if (key->func->tofile == NULL)
return (DST_R_UNSUPPORTEDALG);
if (type & DST_TYPE_PUBLIC) {
ret = write_public_key(key, type, directory);
if (ret != ISC_R_SUCCESS)
return (ret);
}
if ((type & DST_TYPE_PRIVATE) &&
(key->key_flags & DNS_KEYFLAG_TYPEMASK) != DNS_KEYTYPE_NOKEY)
return (key->func->tofile(key, directory));
else
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_fromfile(dns_name_t *name, dns_keytag_t id,
unsigned int alg, int type, const char *directory,
isc_mem_t *mctx, dst_key_t **keyp)
{
char filename[ISC_DIR_NAMEMAX];
isc_buffer_t b;
dst_key_t *key;
isc_result_t result;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(dns_name_isabsolute(name));
REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
REQUIRE(mctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
CHECKALG(alg);
isc_buffer_init(&b, filename, sizeof(filename));
result = buildfilename(name, id, alg, type, directory, &b);
if (result != ISC_R_SUCCESS)
return (result);
key = NULL;
result = dst_key_fromnamedfile(filename, NULL, type, mctx, &key);
if (result != ISC_R_SUCCESS)
return (result);
result = computeid(key);
if (result != ISC_R_SUCCESS) {
dst_key_free(&key);
return (result);
}
if (!dns_name_equal(name, key->key_name) || id != key->key_id ||
alg != key->key_alg) {
dst_key_free(&key);
return (DST_R_INVALIDPRIVATEKEY);
}
key->key_id = id;
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_fromnamedfile(const char *filename, const char *dirname,
int type, isc_mem_t *mctx, dst_key_t **keyp)
{
isc_result_t result;
dst_key_t *pubkey = NULL, *key = NULL;
char *newfilename = NULL;
int newfilenamelen = 0;
isc_lex_t *lex = NULL;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(filename != NULL);
REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
REQUIRE(mctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
/* If an absolute path is specified, don't use the key directory */
#ifndef WIN32
if (filename[0] == '/')
dirname = NULL;
#else /* WIN32 */
if (filename[0] == '/' || filename[0] == '\\')
dirname = NULL;
#endif
newfilenamelen = strlen(filename) + 5;
if (dirname != NULL)
newfilenamelen += strlen(dirname) + 1;
newfilename = isc_mem_get(mctx, newfilenamelen);
if (newfilename == NULL)
return (ISC_R_NOMEMORY);
result = addsuffix(newfilename, newfilenamelen,
dirname, filename, ".key");
INSIST(result == ISC_R_SUCCESS);
result = dst_key_read_public(newfilename, type, mctx, &pubkey);
isc_mem_put(mctx, newfilename, newfilenamelen);
newfilename = NULL;
if (result != ISC_R_SUCCESS)
return (result);
if ((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) == DST_TYPE_PUBLIC ||
(pubkey->key_flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) {
result = computeid(pubkey);
if (result != ISC_R_SUCCESS) {
dst_key_free(&pubkey);
return (result);
}
*keyp = pubkey;
return (ISC_R_SUCCESS);
}
result = algorithm_status(pubkey->key_alg);
if (result != ISC_R_SUCCESS) {
dst_key_free(&pubkey);
return (result);
}
key = get_key_struct(pubkey->key_name, pubkey->key_alg,
pubkey->key_flags, pubkey->key_proto, 0,
pubkey->key_class, mctx);
if (key == NULL) {
dst_key_free(&pubkey);
return (ISC_R_NOMEMORY);
}
if (key->func->parse == NULL)
RETERR(DST_R_UNSUPPORTEDALG);
newfilenamelen = strlen(filename) + 9;
if (dirname != NULL)
newfilenamelen += strlen(dirname) + 1;
newfilename = isc_mem_get(mctx, newfilenamelen);
if (newfilename == NULL)
RETERR(ISC_R_NOMEMORY);
result = addsuffix(newfilename, newfilenamelen,
dirname, filename, ".private");
INSIST(result == ISC_R_SUCCESS);
RETERR(isc_lex_create(mctx, 1500, &lex));
RETERR(isc_lex_openfile(lex, newfilename));
isc_mem_put(mctx, newfilename, newfilenamelen);
RETERR(key->func->parse(key, lex, pubkey));
isc_lex_destroy(&lex);
RETERR(computeid(key));
if (pubkey->key_id != key->key_id)
RETERR(DST_R_INVALIDPRIVATEKEY);
dst_key_free(&pubkey);
*keyp = key;
return (ISC_R_SUCCESS);
out:
if (pubkey != NULL)
dst_key_free(&pubkey);
if (newfilename != NULL)
isc_mem_put(mctx, newfilename, newfilenamelen);
if (lex != NULL)
isc_lex_destroy(&lex);
dst_key_free(&key);
return (result);
}
isc_result_t
dst_key_todns(const dst_key_t *key, isc_buffer_t *target) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(target != NULL);
CHECKALG(key->key_alg);
if (key->func->todns == NULL)
return (DST_R_UNSUPPORTEDALG);
if (isc_buffer_availablelength(target) < 4)
return (ISC_R_NOSPACE);
isc_buffer_putuint16(target, (isc_uint16_t)(key->key_flags & 0xffff));
isc_buffer_putuint8(target, (isc_uint8_t)key->key_proto);
isc_buffer_putuint8(target, (isc_uint8_t)key->key_alg);
if (key->key_flags & DNS_KEYFLAG_EXTENDED) {
if (isc_buffer_availablelength(target) < 2)
return (ISC_R_NOSPACE);
isc_buffer_putuint16(target,
(isc_uint16_t)((key->key_flags >> 16)
& 0xffff));
}
if (key->keydata.generic == NULL) /*%< NULL KEY */
return (ISC_R_SUCCESS);
return (key->func->todns(key, target));
}
isc_result_t
dst_key_fromdns(dns_name_t *name, dns_rdataclass_t rdclass,
isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
{
isc_uint8_t alg, proto;
isc_uint32_t flags, extflags;
dst_key_t *key = NULL;
dns_keytag_t id;
isc_region_t r;
isc_result_t result;
REQUIRE(dst_initialized);
isc_buffer_remainingregion(source, &r);
if (isc_buffer_remaininglength(source) < 4)
return (DST_R_INVALIDPUBLICKEY);
flags = isc_buffer_getuint16(source);
proto = isc_buffer_getuint8(source);
alg = isc_buffer_getuint8(source);
id = dst_region_computeid(&r, alg);
if (flags & DNS_KEYFLAG_EXTENDED) {
if (isc_buffer_remaininglength(source) < 2)
return (DST_R_INVALIDPUBLICKEY);
extflags = isc_buffer_getuint16(source);
flags |= (extflags << 16);
}
result = frombuffer(name, alg, flags, proto, rdclass, source,
mctx, &key);
if (result != ISC_R_SUCCESS)
return (result);
key->key_id = id;
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_frombuffer(dns_name_t *name, unsigned int alg,
unsigned int flags, unsigned int protocol,
dns_rdataclass_t rdclass,
isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
{
dst_key_t *key = NULL;
isc_result_t result;
REQUIRE(dst_initialized);
result = frombuffer(name, alg, flags, protocol, rdclass, source,
mctx, &key);
if (result != ISC_R_SUCCESS)
return (result);
result = computeid(key);
if (result != ISC_R_SUCCESS) {
dst_key_free(&key);
return (result);
}
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_tobuffer(const dst_key_t *key, isc_buffer_t *target) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(target != NULL);
CHECKALG(key->key_alg);
if (key->func->todns == NULL)
return (DST_R_UNSUPPORTEDALG);
return (key->func->todns(key, target));
}
isc_result_t
dst_key_privatefrombuffer(dst_key_t *key, isc_buffer_t *buffer) {
isc_lex_t *lex = NULL;
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(!dst_key_isprivate(key));
REQUIRE(buffer != NULL);
if (key->func->parse == NULL)
RETERR(DST_R_UNSUPPORTEDALG);
RETERR(isc_lex_create(key->mctx, 1500, &lex));
RETERR(isc_lex_openbuffer(lex, buffer));
RETERR(key->func->parse(key, lex, NULL));
out:
if (lex != NULL)
isc_lex_destroy(&lex);
return (result);
}
gss_ctx_id_t
dst_key_getgssctx(const dst_key_t *key)
{
REQUIRE(key != NULL);
return (key->keydata.gssctx);
}
isc_result_t
dst_key_fromgssapi(dns_name_t *name, gss_ctx_id_t gssctx, isc_mem_t *mctx,
dst_key_t **keyp)
{
dst_key_t *key;
REQUIRE(gssctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
key = get_key_struct(name, DST_ALG_GSSAPI, 0, DNS_KEYPROTO_DNSSEC,
0, dns_rdataclass_in, mctx);
if (key == NULL)
return (ISC_R_NOMEMORY);
key->keydata.gssctx = gssctx;
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_fromlabel(dns_name_t *name, int alg, unsigned int flags,
unsigned int protocol, dns_rdataclass_t rdclass,
const char *engine, const char *label, const char *pin,
isc_mem_t *mctx, dst_key_t **keyp)
{
dst_key_t *key;
isc_result_t result;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(dns_name_isabsolute(name));
REQUIRE(mctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
REQUIRE(label != NULL);
CHECKALG(alg);
key = get_key_struct(name, alg, flags, protocol, 0, rdclass, mctx);
if (key == NULL)
return (ISC_R_NOMEMORY);
if (key->func->fromlabel == NULL) {
dst_key_free(&key);
return (DST_R_UNSUPPORTEDALG);
}
result = key->func->fromlabel(key, engine, label, pin);
if (result != ISC_R_SUCCESS) {
dst_key_free(&key);
return (result);
}
result = computeid(key);
if (result != ISC_R_SUCCESS) {
dst_key_free(&key);
return (result);
}
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_generate(dns_name_t *name, unsigned int alg,
unsigned int bits, unsigned int param,
unsigned int flags, unsigned int protocol,
dns_rdataclass_t rdclass,
isc_mem_t *mctx, dst_key_t **keyp)
{
dst_key_t *key;
isc_result_t ret;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(dns_name_isabsolute(name));
REQUIRE(mctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
CHECKALG(alg);
key = get_key_struct(name, alg, flags, protocol, bits, rdclass, mctx);
if (key == NULL)
return (ISC_R_NOMEMORY);
if (bits == 0) { /*%< NULL KEY */
key->key_flags |= DNS_KEYTYPE_NOKEY;
*keyp = key;
return (ISC_R_SUCCESS);
}
if (key->func->generate == NULL) {
dst_key_free(&key);
return (DST_R_UNSUPPORTEDALG);
}
ret = key->func->generate(key, param);
if (ret != ISC_R_SUCCESS) {
dst_key_free(&key);
return (ret);
}
ret = computeid(key);
if (ret != ISC_R_SUCCESS) {
dst_key_free(&key);
return (ret);
}
*keyp = key;
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_getnum(const dst_key_t *key, int type, isc_uint32_t *valuep)
{
REQUIRE(VALID_KEY(key));
REQUIRE(valuep != NULL);
REQUIRE(type <= DST_MAX_NUMERIC);
if (!key->numset[type])
return (ISC_R_NOTFOUND);
*valuep = key->nums[type];
return (ISC_R_SUCCESS);
}
void
dst_key_setnum(dst_key_t *key, int type, isc_uint32_t value)
{
REQUIRE(VALID_KEY(key));
REQUIRE(type <= DST_MAX_NUMERIC);
key->nums[type] = value;
key->numset[type] = ISC_TRUE;
}
void
dst_key_unsetnum(dst_key_t *key, int type)
{
REQUIRE(VALID_KEY(key));
REQUIRE(type <= DST_MAX_NUMERIC);
key->numset[type] = ISC_FALSE;
}
isc_result_t
dst_key_gettime(const dst_key_t *key, int type, isc_stdtime_t *timep) {
REQUIRE(VALID_KEY(key));
REQUIRE(timep != NULL);
REQUIRE(type <= DST_MAX_TIMES);
if (!key->timeset[type])
return (ISC_R_NOTFOUND);
*timep = key->times[type];
return (ISC_R_SUCCESS);
}
void
dst_key_settime(dst_key_t *key, int type, isc_stdtime_t when) {
REQUIRE(VALID_KEY(key));
REQUIRE(type <= DST_MAX_TIMES);
key->times[type] = when;
key->timeset[type] = ISC_TRUE;
}
void
dst_key_unsettime(dst_key_t *key, int type) {
REQUIRE(VALID_KEY(key));
REQUIRE(type <= DST_MAX_TIMES);
key->timeset[type] = ISC_FALSE;
}
isc_result_t
dst_key_getprivateformat(const dst_key_t *key, int *majorp, int *minorp) {
REQUIRE(VALID_KEY(key));
REQUIRE(majorp != NULL);
REQUIRE(minorp != NULL);
*majorp = key->fmt_major;
*minorp = key->fmt_minor;
return (ISC_R_SUCCESS);
}
void
dst_key_setprivateformat(dst_key_t *key, int major, int minor) {
REQUIRE(VALID_KEY(key));
key->fmt_major = major;
key->fmt_minor = minor;
}
static isc_boolean_t
comparekeys(const dst_key_t *key1, const dst_key_t *key2,
isc_boolean_t match_revoked_key,
isc_boolean_t (*compare)(const dst_key_t *key1,
const dst_key_t *key2))
{
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key1));
REQUIRE(VALID_KEY(key2));
if (key1 == key2)
return (ISC_TRUE);
if (key1 == NULL || key2 == NULL)
return (ISC_FALSE);
if (key1->key_alg != key2->key_alg)
return (ISC_FALSE);
/*
* For all algorithms except RSAMD5, revoking the key
* changes the key ID, increasing it by 128. If we want to
* be able to find matching keys even if one of them is the
* revoked version of the other one, then we need to check
* for that possibility.
*/
if (key1->key_id != key2->key_id) {
if (!match_revoked_key)
return (ISC_FALSE);
if (key1->key_alg == DST_ALG_RSAMD5)
return (ISC_FALSE);
if ((key1->key_flags & DNS_KEYFLAG_REVOKE) ==
(key2->key_flags & DNS_KEYFLAG_REVOKE))
return (ISC_FALSE);
if ((key1->key_flags & DNS_KEYFLAG_REVOKE) != 0 &&
key1->key_id != ((key2->key_id + 128) & 0xffff))
return (ISC_FALSE);
if ((key2->key_flags & DNS_KEYFLAG_REVOKE) != 0 &&
key2->key_id != ((key1->key_id + 128) & 0xffff))
return (ISC_FALSE);
}
if (compare != NULL)
return (compare(key1, key2));
else
return (ISC_FALSE);
}
/*
* Compares only the public portion of two keys, by converting them
* both to wire format and comparing the results.
*/
static isc_boolean_t
pub_compare(const dst_key_t *key1, const dst_key_t *key2) {
isc_result_t result;
unsigned char buf1[DST_KEY_MAXSIZE], buf2[DST_KEY_MAXSIZE];
isc_buffer_t b1, b2;
isc_region_t r1, r2;
isc_buffer_init(&b1, buf1, sizeof(buf1));
result = dst_key_todns(key1, &b1);
if (result != ISC_R_SUCCESS)
return (ISC_FALSE);
/* Zero out flags. */
buf1[0] = buf1[1] = 0;
isc_buffer_init(&b2, buf2, sizeof(buf2));
result = dst_key_todns(key2, &b2);
if (result != ISC_R_SUCCESS)
return (ISC_FALSE);
/* Zero out flags. */
buf2[0] = buf2[1] = 0;
isc_buffer_usedregion(&b1, &r1);
isc_buffer_usedregion(&b2, &r2);
return (ISC_TF(isc_region_compare(&r1, &r2) == 0));
}
isc_boolean_t
dst_key_compare(const dst_key_t *key1, const dst_key_t *key2) {
return (comparekeys(key1, key2, ISC_FALSE, key1->func->compare));
}
isc_boolean_t
dst_key_pubcompare(const dst_key_t *key1, const dst_key_t *key2,
isc_boolean_t match_revoked_key)
{
return (comparekeys(key1, key2, match_revoked_key, pub_compare));
}
isc_boolean_t
dst_key_paramcompare(const dst_key_t *key1, const dst_key_t *key2) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key1));
REQUIRE(VALID_KEY(key2));
if (key1 == key2)
return (ISC_TRUE);
if (key1 == NULL || key2 == NULL)
return (ISC_FALSE);
if (key1->key_alg == key2->key_alg &&
key1->func->paramcompare != NULL &&
key1->func->paramcompare(key1, key2) == ISC_TRUE)
return (ISC_TRUE);
else
return (ISC_FALSE);
}
void
dst_key_free(dst_key_t **keyp) {
isc_mem_t *mctx;
dst_key_t *key;
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(keyp != NULL && VALID_KEY(*keyp));
key = *keyp;
mctx = key->mctx;
if (key->keydata.generic != NULL) {
INSIST(key->func->destroy != NULL);
key->func->destroy(key);
}
if (key->engine != NULL)
isc_mem_free(mctx, key->engine);
if (key->label != NULL)
isc_mem_free(mctx, key->label);
dns_name_free(key->key_name, mctx);
isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
memset(key, 0, sizeof(dst_key_t));
isc_mem_put(mctx, key, sizeof(dst_key_t));
*keyp = NULL;
}
isc_boolean_t
dst_key_isprivate(const dst_key_t *key) {
REQUIRE(VALID_KEY(key));
INSIST(key->func->isprivate != NULL);
return (key->func->isprivate(key));
}
isc_result_t
dst_key_buildfilename(const dst_key_t *key, int type,
const char *directory, isc_buffer_t *out) {
REQUIRE(VALID_KEY(key));
REQUIRE(type == DST_TYPE_PRIVATE || type == DST_TYPE_PUBLIC ||
type == 0);
return (buildfilename(key->key_name, key->key_id, key->key_alg,
type, directory, out));
}
isc_result_t
dst_key_sigsize(const dst_key_t *key, unsigned int *n) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(n != NULL);
/* XXXVIX this switch statement is too sparse to gen a jump table. */
switch (key->key_alg) {
case DST_ALG_RSAMD5:
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
*n = (key->key_size + 7) / 8;
break;
case DST_ALG_DSA:
case DST_ALG_NSEC3DSA:
*n = DNS_SIG_DSASIGSIZE;
break;
case DST_ALG_HMACMD5:
*n = 16;
break;
case DST_ALG_HMACSHA1:
*n = ISC_SHA1_DIGESTLENGTH;
break;
case DST_ALG_HMACSHA224:
*n = ISC_SHA224_DIGESTLENGTH;
break;
case DST_ALG_HMACSHA256:
*n = ISC_SHA256_DIGESTLENGTH;
break;
case DST_ALG_HMACSHA384:
*n = ISC_SHA384_DIGESTLENGTH;
break;
case DST_ALG_HMACSHA512:
*n = ISC_SHA512_DIGESTLENGTH;
break;
case DST_ALG_GSSAPI:
*n = 128; /*%< XXX */
break;
case DST_ALG_DH:
default:
return (DST_R_UNSUPPORTEDALG);
}
return (ISC_R_SUCCESS);
}
isc_result_t
dst_key_secretsize(const dst_key_t *key, unsigned int *n) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
REQUIRE(n != NULL);
if (key->key_alg == DST_ALG_DH)
*n = (key->key_size + 7) / 8;
else
return (DST_R_UNSUPPORTEDALG);
return (ISC_R_SUCCESS);
}
/***
*** Static methods
***/
/*%
* Allocates a key structure and fills in some of the fields.
*/
static dst_key_t *
get_key_struct(dns_name_t *name, unsigned int alg,
unsigned int flags, unsigned int protocol,
unsigned int bits, dns_rdataclass_t rdclass,
isc_mem_t *mctx)
{
dst_key_t *key;
isc_result_t result;
int i;
key = (dst_key_t *) isc_mem_get(mctx, sizeof(dst_key_t));
if (key == NULL)
return (NULL);
memset(key, 0, sizeof(dst_key_t));
key->magic = KEY_MAGIC;
key->key_name = isc_mem_get(mctx, sizeof(dns_name_t));
if (key->key_name == NULL) {
isc_mem_put(mctx, key, sizeof(dst_key_t));
return (NULL);
}
dns_name_init(key->key_name, NULL);
result = dns_name_dup(name, mctx, key->key_name);
if (result != ISC_R_SUCCESS) {
isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
isc_mem_put(mctx, key, sizeof(dst_key_t));
return (NULL);
}
key->key_alg = alg;
key->key_flags = flags;
key->key_proto = protocol;
key->mctx = mctx;
key->keydata.generic = NULL;
key->key_size = bits;
key->key_class = rdclass;
key->func = dst_t_func[alg];
key->fmt_major = 0;
key->fmt_minor = 0;
for (i = 0; i < (DST_MAX_TIMES + 1); i++) {
key->times[i] = 0;
key->timeset[i] = ISC_FALSE;
}
return (key);
}
/*%
* Reads a public key from disk
*/
isc_result_t
dst_key_read_public(const char *filename, int type,
isc_mem_t *mctx, dst_key_t **keyp)
{
u_char rdatabuf[DST_KEY_MAXSIZE];
isc_buffer_t b;
dns_fixedname_t name;
isc_lex_t *lex = NULL;
isc_token_t token;
isc_result_t ret;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned int opt = ISC_LEXOPT_DNSMULTILINE;
dns_rdataclass_t rdclass = dns_rdataclass_in;
isc_lexspecials_t specials;
isc_uint32_t ttl;
isc_result_t result;
dns_rdatatype_t keytype;
/*
* Open the file and read its formatted contents
* File format:
* domain.name [ttl] [class] [KEY|DNSKEY] <flags> <protocol> <algorithm> <key>
*/
/* 1500 should be large enough for any key */
ret = isc_lex_create(mctx, 1500, &lex);
if (ret != ISC_R_SUCCESS)
goto cleanup;
memset(specials, 0, sizeof(specials));
specials['('] = 1;
specials[')'] = 1;
specials['"'] = 1;
isc_lex_setspecials(lex, specials);
isc_lex_setcomments(lex, ISC_LEXCOMMENT_DNSMASTERFILE);
ret = isc_lex_openfile(lex, filename);
if (ret != ISC_R_SUCCESS)
goto cleanup;
#define NEXTTOKEN(lex, opt, token) { \
ret = isc_lex_gettoken(lex, opt, token); \
if (ret != ISC_R_SUCCESS) \
goto cleanup; \
}
#define BADTOKEN() { \
ret = ISC_R_UNEXPECTEDTOKEN; \
goto cleanup; \
}
/* Read the domain name */
NEXTTOKEN(lex, opt, &token);
if (token.type != isc_tokentype_string)
BADTOKEN();
/*
* We don't support "@" in .key files.
*/
if (!strcmp(DST_AS_STR(token), "@"))
BADTOKEN();
dns_fixedname_init(&name);
isc_buffer_init(&b, DST_AS_STR(token), strlen(DST_AS_STR(token)));
isc_buffer_add(&b, strlen(DST_AS_STR(token)));
ret = dns_name_fromtext(dns_fixedname_name(&name), &b, dns_rootname,
0, NULL);
if (ret != ISC_R_SUCCESS)
goto cleanup;
/* Read the next word: either TTL, class, or 'KEY' */
NEXTTOKEN(lex, opt, &token);
if (token.type != isc_tokentype_string)
BADTOKEN();
/* If it's a TTL, read the next one */
result = dns_ttl_fromtext(&token.value.as_textregion, &ttl);
if (result == ISC_R_SUCCESS)
NEXTTOKEN(lex, opt, &token);
if (token.type != isc_tokentype_string)
BADTOKEN();
ret = dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion);
if (ret == ISC_R_SUCCESS)
NEXTTOKEN(lex, opt, &token);
if (token.type != isc_tokentype_string)
BADTOKEN();
if (strcasecmp(DST_AS_STR(token), "DNSKEY") == 0)
keytype = dns_rdatatype_dnskey;
else if (strcasecmp(DST_AS_STR(token), "KEY") == 0)
keytype = dns_rdatatype_key; /*%< SIG(0), TKEY */
else
BADTOKEN();
if (((type & DST_TYPE_KEY) != 0 && keytype != dns_rdatatype_key) ||
((type & DST_TYPE_KEY) == 0 && keytype != dns_rdatatype_dnskey)) {
ret = DST_R_BADKEYTYPE;
goto cleanup;
}
isc_buffer_init(&b, rdatabuf, sizeof(rdatabuf));
ret = dns_rdata_fromtext(&rdata, rdclass, keytype, lex, NULL,
ISC_FALSE, mctx, &b, NULL);
if (ret != ISC_R_SUCCESS)
goto cleanup;
ret = dst_key_fromdns(dns_fixedname_name(&name), rdclass, &b, mctx,
keyp);
if (ret != ISC_R_SUCCESS)
goto cleanup;
cleanup:
if (lex != NULL)
isc_lex_destroy(&lex);
return (ret);
}
/*%
* Set the flags on a key, then recompute the key ID
*/
isc_result_t
dst_key_setflags(dst_key_t *key, isc_uint32_t flags) {
REQUIRE(VALID_KEY(key));
key->key_flags = flags;
return (computeid(key));
}
static isc_boolean_t
issymmetric(const dst_key_t *key) {
REQUIRE(dst_initialized == ISC_TRUE);
REQUIRE(VALID_KEY(key));
/* XXXVIX this switch statement is too sparse to gen a jump table. */
switch (key->key_alg) {
case DST_ALG_RSAMD5:
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
case DST_ALG_DSA:
case DST_ALG_NSEC3DSA:
case DST_ALG_DH:
return (ISC_FALSE);
case DST_ALG_HMACMD5:
case DST_ALG_GSSAPI:
return (ISC_TRUE);
default:
return (ISC_FALSE);
}
}
/*%
* Write key timing metadata to a file pointer, preceded by 'tag'
*/
static void
printtime(const dst_key_t *key, int type, const char *tag, FILE *stream) {
isc_result_t result;
const char *output;
isc_stdtime_t when;
time_t t;
result = dst_key_gettime(key, type, &when);
if (result == ISC_R_NOTFOUND)
return;
/* time_t and isc_stdtime_t might be different sizes */
t = when;
output = ctime(&t);
fprintf(stream, "%s: %s", tag, output);
}
/*%
* Writes a public key to disk in DNS format.
*/
static isc_result_t
write_public_key(const dst_key_t *key, int type, const char *directory) {
FILE *fp;
isc_buffer_t keyb, textb, fileb, classb;
isc_region_t r;
char filename[ISC_DIR_NAMEMAX];
unsigned char key_array[DST_KEY_MAXSIZE];
char text_array[DST_KEY_MAXTEXTSIZE];
char class_array[10];
isc_result_t ret;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_fsaccess_t access;
REQUIRE(VALID_KEY(key));
isc_buffer_init(&keyb, key_array, sizeof(key_array));
isc_buffer_init(&textb, text_array, sizeof(text_array));
isc_buffer_init(&classb, class_array, sizeof(class_array));
ret = dst_key_todns(key, &keyb);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_usedregion(&keyb, &r);
dns_rdata_fromregion(&rdata, key->key_class, dns_rdatatype_dnskey, &r);
ret = dns_rdata_totext(&rdata, (dns_name_t *) NULL, &textb);
if (ret != ISC_R_SUCCESS)
return (DST_R_INVALIDPUBLICKEY);
ret = dns_rdataclass_totext(key->key_class, &classb);
if (ret != ISC_R_SUCCESS)
return (DST_R_INVALIDPUBLICKEY);
/*
* Make the filename.
*/
isc_buffer_init(&fileb, filename, sizeof(filename));
ret = dst_key_buildfilename(key, DST_TYPE_PUBLIC, directory, &fileb);
if (ret != ISC_R_SUCCESS)
return (ret);
/*
* Create public key file.
*/
if ((fp = fopen(filename, "w")) == NULL)
return (DST_R_WRITEERROR);
if (issymmetric(key)) {
access = 0;
isc_fsaccess_add(ISC_FSACCESS_OWNER,
ISC_FSACCESS_READ | ISC_FSACCESS_WRITE,
&access);
(void)isc_fsaccess_set(filename, access);
}
/* Write key information in comments */
if ((type & DST_TYPE_KEY) == 0) {
fprintf(fp, "; This is a %s%s-signing key, keyid %d, for ",
(key->key_flags & DNS_KEYFLAG_REVOKE) != 0 ?
"revoked " :
"",
(key->key_flags & DNS_KEYFLAG_KSK) != 0 ?
"key" :
"zone",
key->key_id);
ret = dns_name_print(key->key_name, fp);
if (ret != ISC_R_SUCCESS) {
fclose(fp);
return (ret);
}
fputc('\n', fp);
printtime(key, DST_TIME_CREATED, "; Created", fp);
printtime(key, DST_TIME_PUBLISH, "; Publish", fp);
printtime(key, DST_TIME_ACTIVATE, "; Activate", fp);
printtime(key, DST_TIME_REVOKE, "; Revoke", fp);
printtime(key, DST_TIME_INACTIVE, "; Inactive", fp);
printtime(key, DST_TIME_DELETE, "; Delete", fp);
}
/* Now print the actual key */
ret = dns_name_print(key->key_name, fp);
fprintf(fp, " ");
isc_buffer_usedregion(&classb, &r);
fwrite(r.base, 1, r.length, fp);
if ((type & DST_TYPE_KEY) != 0)
fprintf(fp, " KEY ");
else
fprintf(fp, " DNSKEY ");
isc_buffer_usedregion(&textb, &r);
fwrite(r.base, 1, r.length, fp);
fputc('\n', fp);
fflush(fp);
if (ferror(fp))
ret = DST_R_WRITEERROR;
fclose(fp);
return (ret);
}
static isc_result_t
buildfilename(dns_name_t *name, dns_keytag_t id,
unsigned int alg, unsigned int type,
const char *directory, isc_buffer_t *out)
{
const char *suffix = "";
unsigned int len;
isc_result_t result;
REQUIRE(out != NULL);
if ((type & DST_TYPE_PRIVATE) != 0)
suffix = ".private";
else if (type == DST_TYPE_PUBLIC)
suffix = ".key";
if (directory != NULL) {
if (isc_buffer_availablelength(out) < strlen(directory))
return (ISC_R_NOSPACE);
isc_buffer_putstr(out, directory);
if (strlen(directory) > 0U &&
directory[strlen(directory) - 1] != '/')
isc_buffer_putstr(out, "/");
}
if (isc_buffer_availablelength(out) < 1)
return (ISC_R_NOSPACE);
isc_buffer_putstr(out, "K");
result = dns_name_tofilenametext(name, ISC_FALSE, out);
if (result != ISC_R_SUCCESS)
return (result);
len = 1 + 3 + 1 + 5 + strlen(suffix) + 1;
if (isc_buffer_availablelength(out) < len)
return (ISC_R_NOSPACE);
sprintf((char *) isc_buffer_used(out), "+%03d+%05d%s", alg, id,
suffix);
isc_buffer_add(out, len);
return (ISC_R_SUCCESS);
}
static isc_result_t
computeid(dst_key_t *key) {
isc_buffer_t dnsbuf;
unsigned char dns_array[DST_KEY_MAXSIZE];
isc_region_t r;
isc_result_t ret;
isc_buffer_init(&dnsbuf, dns_array, sizeof(dns_array));
ret = dst_key_todns(key, &dnsbuf);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_usedregion(&dnsbuf, &r);
key->key_id = dst_region_computeid(&r, key->key_alg);
return (ISC_R_SUCCESS);
}
static isc_result_t
frombuffer(dns_name_t *name, unsigned int alg, unsigned int flags,
unsigned int protocol, dns_rdataclass_t rdclass,
isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
{
dst_key_t *key;
isc_result_t ret;
REQUIRE(dns_name_isabsolute(name));
REQUIRE(source != NULL);
REQUIRE(mctx != NULL);
REQUIRE(keyp != NULL && *keyp == NULL);
key = get_key_struct(name, alg, flags, protocol, 0, rdclass, mctx);
if (key == NULL)
return (ISC_R_NOMEMORY);
if (isc_buffer_remaininglength(source) > 0) {
ret = algorithm_status(alg);
if (ret != ISC_R_SUCCESS) {
dst_key_free(&key);
return (ret);
}
if (key->func->fromdns == NULL) {
dst_key_free(&key);
return (DST_R_UNSUPPORTEDALG);
}
ret = key->func->fromdns(key, source);
if (ret != ISC_R_SUCCESS) {
dst_key_free(&key);
return (ret);
}
}
*keyp = key;
return (ISC_R_SUCCESS);
}
static isc_result_t
algorithm_status(unsigned int alg) {
REQUIRE(dst_initialized == ISC_TRUE);
if (dst_algorithm_supported(alg))
return (ISC_R_SUCCESS);
#ifndef OPENSSL
if (alg == DST_ALG_RSAMD5 || alg == DST_ALG_RSASHA1 ||
alg == DST_ALG_DSA || alg == DST_ALG_DH ||
alg == DST_ALG_HMACMD5 || alg == DST_ALG_NSEC3DSA ||
alg == DST_ALG_NSEC3RSASHA1)
return (DST_R_NOCRYPTO);
#endif
return (DST_R_UNSUPPORTEDALG);
}
static isc_result_t
addsuffix(char *filename, int len, const char *odirname,
const char *ofilename, const char *suffix)
{
int olen = strlen(ofilename);
int n;
if (olen > 1 && ofilename[olen - 1] == '.')
olen -= 1;
else if (olen > 8 && strcmp(ofilename + olen - 8, ".private") == 0)
olen -= 8;
else if (olen > 4 && strcmp(ofilename + olen - 4, ".key") == 0)
olen -= 4;
if (odirname == NULL)
n = snprintf(filename, len, "%.*s%s", olen, ofilename, suffix);
else
n = snprintf(filename, len, "%s/%.*s%s",
odirname, olen, ofilename, suffix);
if (n < 0)
return (ISC_R_FAILURE);
if (n >= len)
return (ISC_R_NOSPACE);
return (ISC_R_SUCCESS);
}
isc_result_t
dst__entropy_getdata(void *buf, unsigned int len, isc_boolean_t pseudo) {
#ifdef BIND9
unsigned int flags = dst_entropy_flags;
if (pseudo)
flags &= ~ISC_ENTROPY_GOODONLY;
else
flags |= ISC_ENTROPY_BLOCKING;
return (isc_entropy_getdata(dst_entropy_pool, buf, len, NULL, flags));
#else
UNUSED(buf);
UNUSED(len);
UNUSED(pseudo);
return (ISC_R_NOTIMPLEMENTED);
#endif
}
unsigned int
dst__entropy_status(void) {
#ifdef BIND9
return (isc_entropy_status(dst_entropy_pool));
#else
return (0);
#endif
}