Add code to store key-stores

New files to define a structure and functions for dealing with
key-stores.
This commit is contained in:
Matthijs Mekking 2022-01-25 09:25:03 +01:00
parent a035f3b10e
commit 0284482687
3 changed files with 360 additions and 0 deletions

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@ -83,6 +83,7 @@ libdns_la_HEADERS = \
include/dns/keydata.h \
include/dns/keyflags.h \
include/dns/keymgr.h \
include/dns/keystore.h \
include/dns/keytable.h \
include/dns/keyvalues.h \
include/dns/librpz.h \
@ -190,6 +191,7 @@ libdns_la_SOURCES = \
key.c \
keydata.c \
keymgr.c \
keystore.c \
keytable.c \
log.c \
master.c \

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@ -0,0 +1,194 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#pragma once
/*****
***** Module Info
*****/
/*! \file dns/keystore.h
* \brief
* DNSSEC Key Store
*
* A key store defines where to store DNSSEC keys.
*/
#include <isc/lang.h>
#include <isc/magic.h>
#include <isc/mutex.h>
#include <isc/refcount.h>
#include <dns/types.h>
ISC_LANG_BEGINDECLS
/* Key store */
struct dns_keystore {
unsigned int magic;
isc_mem_t *mctx;
const char *name;
const char *engine;
/* Internals. */
isc_mutex_t lock;
/* Locked by themselves. */
isc_refcount_t references;
/* Under owner's locking control. */
ISC_LINK(struct dns_keystore) link;
/* Configuration values */
char *directory;
char *pkcs11uri;
};
#define DNS_KEYSTORE_MAGIC ISC_MAGIC('K', 'E', 'Y', 'S')
#define DNS_KEYSTORE_VALID(ks) ISC_MAGIC_VALID(ks, DNS_KEYSTORE_MAGIC)
isc_result_t
dns_keystore_create(isc_mem_t *mctx, const char *name, dns_keystore_t **kspp);
/*%<
* Create a key store.
*
* Requires:
*
*\li 'mctx' is a valid memory context.
*
*\li 'name' is a valid C string.
*
*\li kspp != NULL && *kspp == NULL
*
* Returns:
*
*\li #ISC_R_SUCCESS
*\li #ISC_R_NOMEMORY
*
*\li Other errors are possible.
*/
void
dns_keystore_attach(dns_keystore_t *source, dns_keystore_t **targetp);
/*%<
* Attach '*targetp' to 'source'.
*
* Requires:
*
*\li 'source' is a valid keystore.
*
*\li 'targetp' points to a NULL dns_keystore_t *.
*
* Ensures:
*
*\li *targetp is attached to source.
*
*\li While *targetp is attached, the keystore will not shut down.
*/
void
dns_keystore_detach(dns_keystore_t **kspp);
/*%<
* Detach keystore.
*
* Requires:
*
*\li 'kspp' points to a valid dns_keystore_t *
*
* Ensures:
*
*\li *kspp is NULL.
*/
const char *
dns_keystore_name(dns_keystore_t *keystore);
/*%<
* Get keystore name.
*
* Requires:
*
*\li 'keystore' is a valid keystore.
*
* Returns:
*
*\li name of 'keystore'.
*/
const char *
dns_keystore_directory(dns_keystore_t *keystore);
/*%<
* Get keystore directory.
*
* Requires:
*
*\li 'keystore' is a valid keystore.
*
* Returns:
*
*\li directory of 'keystore'.
*/
void
dns_keystore_setdirectory(dns_keystore_t *keystore, const char *dir);
/*%<
* Set keystore directory.
*
* Requires:
*
*\li 'keystore' is a valid keystore.
*
*/
const char *
dns_keystore_pkcs11uri(dns_keystore_t *keystore);
/*%<
* Get keystore PKCS#11 URI.
*
* Requires:
*
*\li 'keystore' is a valid keystore.
*
* Returns:
*
*\li PKCS#11 URI of 'keystore'.
*/
void
dns_keystore_setpkcs11uri(dns_keystore_t *keystore, const char *uri);
/*%<
* Set keystore PKCS#11 URI.
*
* Requires:
*
*\li 'keystore' is a valid keystore.
*
*/
isc_result_t
dns_keystorelist_find(dns_keystorelist_t *list, const char *name,
dns_keystore_t **kspp);
/*%<
* Search for a keystore with name 'name' in 'list'.
* If found, '*kspp' is (strongly) attached to it.
*
* Requires:
*
*\li 'kspp' points to a NULL dns_keystore_t *.
*
* Returns:
*
*\li #ISC_R_SUCCESS A matching keystore was found.
*\li #ISC_R_NOTFOUND No matching keystore was found.
*/
ISC_LANG_ENDDECLS

164
lib/dns/keystore.c Normal file
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@ -0,0 +1,164 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#ifdef HAVE_GNUTLS
#include <gnutls/crypto.h>
#include <gnutls/pkcs11.h>
#endif
#include <string.h>
#include <isc/assertions.h>
#include <isc/mem.h>
#include <isc/time.h>
#include <isc/util.h>
#include <dns/keystore.h>
isc_result_t
dns_keystore_create(isc_mem_t *mctx, const char *name, dns_keystore_t **kspp) {
dns_keystore_t *keystore;
REQUIRE(name != NULL);
REQUIRE(kspp != NULL && *kspp == NULL);
keystore = isc_mem_get(mctx, sizeof(*keystore));
keystore->mctx = NULL;
isc_mem_attach(mctx, &keystore->mctx);
keystore->name = isc_mem_strdup(mctx, name);
isc_mutex_init(&keystore->lock);
isc_refcount_init(&keystore->references, 1);
ISC_LINK_INIT(keystore, link);
keystore->directory = NULL;
keystore->pkcs11uri = NULL;
keystore->magic = DNS_KEYSTORE_MAGIC;
*kspp = keystore;
return (ISC_R_SUCCESS);
}
void
dns_keystore_attach(dns_keystore_t *source, dns_keystore_t **targetp) {
REQUIRE(DNS_KEYSTORE_VALID(source));
REQUIRE(targetp != NULL && *targetp == NULL);
isc_refcount_increment(&source->references);
*targetp = source;
}
static inline void
destroy(dns_keystore_t *keystore) {
REQUIRE(!ISC_LINK_LINKED(keystore, link));
isc_mutex_destroy(&keystore->lock);
name = UNCONST(keystore->name);
isc_mem_free(keystore->mctx, name);
if (keystore->directory != NULL) {
isc_mem_free(keystore->mctx, keystore->directory);
}
if (keystore->pkcs11uri != NULL) {
isc_mem_free(keystore->mctx, keystore->pkcs11uri);
}
isc_mem_putanddetach(&keystore->mctx, keystore, sizeof(*keystore));
}
void
dns_keystore_detach(dns_keystore_t **kspp) {
REQUIRE(kspp != NULL && DNS_KEYSTORE_VALID(*kspp));
dns_keystore_t *ks = *kspp;
*kspp = NULL;
if (isc_refcount_decrement(&ks->references) == 1) {
destroy(ks);
}
}
const char *
dns_keystore_name(dns_keystore_t *keystore) {
REQUIRE(DNS_KEYSTORE_VALID(keystore));
return (keystore->name);
}
const char *
dns_keystore_directory(dns_keystore_t *keystore) {
REQUIRE(DNS_KEYSTORE_VALID(keystore));
return (keystore->directory);
}
void
dns_keystore_setdirectory(dns_keystore_t *keystore, const char *dir) {
REQUIRE(DNS_KEYSTORE_VALID(keystore));
if (keystore->directory != NULL) {
isc_mem_free(keystore->mctx, keystore->directory);
}
keystore->directory = (dir == NULL)
? NULL
: isc_mem_strdup(keystore->mctx, dir);
}
const char *
dns_keystore_pkcs11uri(dns_keystore_t *keystore) {
REQUIRE(DNS_KEYSTORE_VALID(keystore));
return (keystore->pkcs11uri);
}
void
dns_keystore_setpkcs11uri(dns_keystore_t *keystore, const char *uri) {
REQUIRE(DNS_KEYSTORE_VALID(keystore));
if (keystore->pkcs11uri != NULL) {
isc_mem_free(keystore->mctx, keystore->pkcs11uri);
}
keystore->pkcs11uri = (uri == NULL)
? NULL
: isc_mem_strdup(keystore->mctx, uri);
}
isc_result_t
dns_keystorelist_find(dns_keystorelist_t *list, const char *name,
dns_keystore_t **kspp) {
dns_keystore_t *keystore = NULL;
REQUIRE(kspp != NULL && *kspp == NULL);
if (list == NULL) {
return (ISC_R_NOTFOUND);
}
for (keystore = ISC_LIST_HEAD(*list); keystore != NULL;
keystore = ISC_LIST_NEXT(keystore, link))
{
if (strcmp(keystore->name, name) == 0) {
break;
}
}
if (keystore == NULL) {
return (ISC_R_NOTFOUND);
}
dns_keystore_attach(keystore, kspp);
return (ISC_R_SUCCESS);
}