292 lines
5.6 KiB
C
292 lines
5.6 KiB
C
/*
|
|
* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#include "internal/refcount.h"
|
|
#include <openssl/bn.h>
|
|
#include "dh_local.h"
|
|
#include <openssl/engine.h>
|
|
|
|
int DH_set_method(DH *dh, const DH_METHOD *meth)
|
|
{
|
|
/*
|
|
* NB: The caller is specifically setting a method, so it's not up to us
|
|
* to deal with which ENGINE it comes from.
|
|
*/
|
|
const DH_METHOD *mtmp;
|
|
mtmp = dh->meth;
|
|
if (mtmp->finish)
|
|
mtmp->finish(dh);
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
ENGINE_finish(dh->engine);
|
|
dh->engine = NULL;
|
|
#endif
|
|
dh->meth = meth;
|
|
if (meth->init)
|
|
meth->init(dh);
|
|
return 1;
|
|
}
|
|
|
|
DH *DH_new(void)
|
|
{
|
|
return DH_new_method(NULL);
|
|
}
|
|
|
|
DH *DH_new_method(ENGINE *engine)
|
|
{
|
|
DH *ret = OPENSSL_zalloc(sizeof(*ret));
|
|
|
|
if (ret == NULL) {
|
|
DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
ret->references = 1;
|
|
ret->lock = CRYPTO_THREAD_lock_new();
|
|
if (ret->lock == NULL) {
|
|
DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE);
|
|
OPENSSL_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
ret->meth = DH_get_default_method();
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
ret->flags = ret->meth->flags; /* early default init */
|
|
if (engine) {
|
|
if (!ENGINE_init(engine)) {
|
|
DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
|
|
goto err;
|
|
}
|
|
ret->engine = engine;
|
|
} else
|
|
ret->engine = ENGINE_get_default_DH();
|
|
if (ret->engine) {
|
|
ret->meth = ENGINE_get_DH(ret->engine);
|
|
if (ret->meth == NULL) {
|
|
DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ret->flags = ret->meth->flags;
|
|
|
|
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data))
|
|
goto err;
|
|
|
|
if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
|
|
DHerr(DH_F_DH_NEW_METHOD, ERR_R_INIT_FAIL);
|
|
goto err;
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
DH_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
void DH_free(DH *r)
|
|
{
|
|
int i;
|
|
|
|
if (r == NULL)
|
|
return;
|
|
|
|
CRYPTO_DOWN_REF(&r->references, &i, r->lock);
|
|
REF_PRINT_COUNT("DH", r);
|
|
if (i > 0)
|
|
return;
|
|
REF_ASSERT_ISNT(i < 0);
|
|
|
|
if (r->meth != NULL && r->meth->finish != NULL)
|
|
r->meth->finish(r);
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
ENGINE_finish(r->engine);
|
|
#endif
|
|
|
|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
|
|
|
|
CRYPTO_THREAD_lock_free(r->lock);
|
|
|
|
BN_clear_free(r->p);
|
|
BN_clear_free(r->g);
|
|
BN_clear_free(r->q);
|
|
BN_clear_free(r->j);
|
|
OPENSSL_free(r->seed);
|
|
BN_clear_free(r->counter);
|
|
BN_clear_free(r->pub_key);
|
|
BN_clear_free(r->priv_key);
|
|
OPENSSL_free(r);
|
|
}
|
|
|
|
int DH_up_ref(DH *r)
|
|
{
|
|
int i;
|
|
|
|
if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0)
|
|
return 0;
|
|
|
|
REF_PRINT_COUNT("DH", r);
|
|
REF_ASSERT_ISNT(i < 2);
|
|
return ((i > 1) ? 1 : 0);
|
|
}
|
|
|
|
int DH_set_ex_data(DH *d, int idx, void *arg)
|
|
{
|
|
return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
|
|
}
|
|
|
|
void *DH_get_ex_data(DH *d, int idx)
|
|
{
|
|
return CRYPTO_get_ex_data(&d->ex_data, idx);
|
|
}
|
|
|
|
int DH_bits(const DH *dh)
|
|
{
|
|
return BN_num_bits(dh->p);
|
|
}
|
|
|
|
int DH_size(const DH *dh)
|
|
{
|
|
return BN_num_bytes(dh->p);
|
|
}
|
|
|
|
int DH_security_bits(const DH *dh)
|
|
{
|
|
int N;
|
|
if (dh->q)
|
|
N = BN_num_bits(dh->q);
|
|
else if (dh->length)
|
|
N = dh->length;
|
|
else
|
|
N = -1;
|
|
return BN_security_bits(BN_num_bits(dh->p), N);
|
|
}
|
|
|
|
|
|
void DH_get0_pqg(const DH *dh,
|
|
const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
|
|
{
|
|
if (p != NULL)
|
|
*p = dh->p;
|
|
if (q != NULL)
|
|
*q = dh->q;
|
|
if (g != NULL)
|
|
*g = dh->g;
|
|
}
|
|
|
|
int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
|
|
{
|
|
/* If the fields p and g in d are NULL, the corresponding input
|
|
* parameters MUST be non-NULL. q may remain NULL.
|
|
*/
|
|
if ((dh->p == NULL && p == NULL)
|
|
|| (dh->g == NULL && g == NULL))
|
|
return 0;
|
|
|
|
if (p != NULL) {
|
|
BN_free(dh->p);
|
|
dh->p = p;
|
|
}
|
|
if (q != NULL) {
|
|
BN_free(dh->q);
|
|
dh->q = q;
|
|
}
|
|
if (g != NULL) {
|
|
BN_free(dh->g);
|
|
dh->g = g;
|
|
}
|
|
|
|
if (q != NULL) {
|
|
dh->length = BN_num_bits(q);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
long DH_get_length(const DH *dh)
|
|
{
|
|
return dh->length;
|
|
}
|
|
|
|
int DH_set_length(DH *dh, long length)
|
|
{
|
|
dh->length = length;
|
|
return 1;
|
|
}
|
|
|
|
void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)
|
|
{
|
|
if (pub_key != NULL)
|
|
*pub_key = dh->pub_key;
|
|
if (priv_key != NULL)
|
|
*priv_key = dh->priv_key;
|
|
}
|
|
|
|
int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)
|
|
{
|
|
if (pub_key != NULL) {
|
|
BN_clear_free(dh->pub_key);
|
|
dh->pub_key = pub_key;
|
|
}
|
|
if (priv_key != NULL) {
|
|
BN_clear_free(dh->priv_key);
|
|
dh->priv_key = priv_key;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
const BIGNUM *DH_get0_p(const DH *dh)
|
|
{
|
|
return dh->p;
|
|
}
|
|
|
|
const BIGNUM *DH_get0_q(const DH *dh)
|
|
{
|
|
return dh->q;
|
|
}
|
|
|
|
const BIGNUM *DH_get0_g(const DH *dh)
|
|
{
|
|
return dh->g;
|
|
}
|
|
|
|
const BIGNUM *DH_get0_priv_key(const DH *dh)
|
|
{
|
|
return dh->priv_key;
|
|
}
|
|
|
|
const BIGNUM *DH_get0_pub_key(const DH *dh)
|
|
{
|
|
return dh->pub_key;
|
|
}
|
|
|
|
void DH_clear_flags(DH *dh, int flags)
|
|
{
|
|
dh->flags &= ~flags;
|
|
}
|
|
|
|
int DH_test_flags(const DH *dh, int flags)
|
|
{
|
|
return dh->flags & flags;
|
|
}
|
|
|
|
void DH_set_flags(DH *dh, int flags)
|
|
{
|
|
dh->flags |= flags;
|
|
}
|
|
|
|
ENGINE *DH_get0_engine(DH *dh)
|
|
{
|
|
return dh->engine;
|
|
}
|