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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "keypair.h"
#include "keypair_private.h"
/**
* Returns specific private key for different keypair types
*/
static void *
rspamd_cryptobox_keypair_sk (struct rspamd_cryptobox_keypair *kp,
guint *len)
{
g_assert (kp != NULL);
if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) {
if (kp->type == RSPAMD_KEYPAIR_KEX) {
*len = 32;
return RSPAMD_CRYPTOBOX_KEYPAIR_25519(kp)->sk;
}
else {
*len = 64;
return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_25519(kp)->sk;
}
}
else {
if (kp->type == RSPAMD_KEYPAIR_KEX) {
*len = 32;
return RSPAMD_CRYPTOBOX_KEYPAIR_NIST(kp)->sk;
}
else {
*len = 32;
return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_NIST(kp)->sk;
}
}
/* Not reached */
return NULL;
}
static void *
rspamd_cryptobox_keypair_pk (struct rspamd_cryptobox_keypair *kp,
guint *len)
{
g_assert (kp != NULL);
if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) {
if (kp->type == RSPAMD_KEYPAIR_KEX) {
*len = 32;
return RSPAMD_CRYPTOBOX_KEYPAIR_25519(kp)->pk;
}
else {
*len = 32;
return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_25519(kp)->pk;
}
}
else {
if (kp->type == RSPAMD_KEYPAIR_KEX) {
*len = 65;
return RSPAMD_CRYPTOBOX_KEYPAIR_NIST(kp)->pk;
}
else {
*len = 65;
return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_NIST(kp)->pk;
}
}
/* Not reached */
return NULL;
}
static struct rspamd_cryptobox_keypair *
rspamd_cryptobox_keypair_alloc (enum rspamd_cryptobox_keypair_type type,
enum rspamd_cryptobox_mode alg)
{
struct rspamd_cryptobox_keypair *kp;
guint size = 0;
if (alg == RSPAMD_CRYPTOBOX_MODE_25519) {
if (type == RSPAMD_KEYPAIR_KEX) {
size = sizeof (struct rspamd_cryptobox_keypair_25519);
}
else {
size = sizeof (struct rspamd_cryptobox_keypair_sig_25519);
}
}
else {
if (type == RSPAMD_KEYPAIR_KEX) {
size = sizeof (struct rspamd_cryptobox_keypair_nist);
}
else {
size = sizeof (struct rspamd_cryptobox_keypair_sig_nist);
}
}
g_assert (size >= sizeof (*kp));
if (posix_memalign ((void **)&kp, 32, size) != 0) {
abort ();
}
return kp;
}
void
rspamd_cryptobox_nm_dtor (struct rspamd_cryptobox_nm *nm)
{
rspamd_explicit_memzero (nm->nm, sizeof (nm->nm));
free (nm);
}
void
rspamd_cryptobox_keypair_dtor (struct rspamd_cryptobox_keypair *kp)
{
void *sk;
guint len = 0;
sk = rspamd_cryptobox_keypair_sk (kp, &len);
g_assert (sk != NULL && len > 0);
rspamd_explicit_memzero (sk, len);
/* Not g_free as kp is aligned using posix_memalign */
free (kp);
}
void
rspamd_cryptobox_pubkey_dtor (struct rspamd_cryptobox_pubkey *p)
{
if (p->nm) {
REF_RELEASE (p->nm);
}
/* Not g_free as p is aligned using posix_memalign */
free (p);
}
struct rspamd_cryptobox_keypair*
rspamd_keypair_new (enum rspamd_cryptobox_keypair_type type,
enum rspamd_cryptobox_mode alg)
{
struct rspamd_cryptobox_keypair *kp;
void *pk, *sk;
guint size;
kp = rspamd_cryptobox_keypair_alloc (type, alg);
sk = rspamd_cryptobox_keypair_sk (kp, &size);
pk = rspamd_cryptobox_keypair_pk (kp, &size);
if (type == RSPAMD_KEYPAIR_KEX) {
rspamd_cryptobox_keypair (pk, sk, alg);
}
else {
rspamd_cryptobox_keypair_sig (pk, sk, alg);
}
rspamd_cryptobox_hash (kp->id, pk, size, NULL, 0);
kp->alg = alg;
kp->type = type;
REF_INIT_RETAIN (kp, rspamd_cryptobox_keypair_dtor);
return pk;
}
struct rspamd_cryptobox_keypair*
rspamd_keypair_ref (struct rspamd_cryptobox_keypair *kp)
{
REF_RETAIN (kp);
return kp;
}
void
rspamd_keypair_unref (struct rspamd_cryptobox_keypair *kp)
{
REF_RELEASE (kp);
}
struct rspamd_cryptobox_pubkey*
rspamd_pubkey_ref (struct rspamd_cryptobox_pubkey *kp)
{
REF_RETAIN (kp);
return kp;
}
void
rspamd_pubkey_unref (struct rspamd_cryptobox_pubkey *kp)
{
REF_RELEASE (kp);
}
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