337 lines
6.8 KiB
C
337 lines
6.8 KiB
C
/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DH low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <stdio.h>
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#include <openssl/bn.h>
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#ifndef FIPS_MODULE
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# include <openssl/engine.h>
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#endif
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#include <openssl/obj_mac.h>
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#include <openssl/core_names.h>
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#include "internal/cryptlib.h"
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#include "internal/refcount.h"
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#include "crypto/evp.h"
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#include "crypto/dh.h"
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#include "dh_local.h"
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static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx);
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#ifndef FIPS_MODULE
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int DH_set_method(DH *dh, const DH_METHOD *meth)
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{
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/*
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* NB: The caller is specifically setting a method, so it's not up to us
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* to deal with which ENGINE it comes from.
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*/
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const DH_METHOD *mtmp;
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mtmp = dh->meth;
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if (mtmp->finish)
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mtmp->finish(dh);
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(dh->engine);
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dh->engine = NULL;
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#endif
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dh->meth = meth;
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if (meth->init)
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meth->init(dh);
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return 1;
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}
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const DH_METHOD *ossl_dh_get_method(const DH *dh)
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{
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return dh->meth;
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}
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# ifndef OPENSSL_NO_DEPRECATED_3_0
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DH *DH_new(void)
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{
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return dh_new_intern(NULL, NULL);
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}
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# endif
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DH *DH_new_method(ENGINE *engine)
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{
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return dh_new_intern(engine, NULL);
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}
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#endif /* !FIPS_MODULE */
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DH *ossl_dh_new_ex(OSSL_LIB_CTX *libctx)
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{
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return dh_new_intern(NULL, libctx);
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}
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static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx)
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{
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DH *ret = OPENSSL_zalloc(sizeof(*ret));
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if (ret == NULL)
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return NULL;
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ret->lock = CRYPTO_THREAD_lock_new();
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if (ret->lock == NULL) {
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ERR_raise(ERR_LIB_DH, ERR_R_CRYPTO_LIB);
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OPENSSL_free(ret);
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return NULL;
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}
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if (!CRYPTO_NEW_REF(&ret->references, 1)) {
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CRYPTO_THREAD_lock_free(ret->lock);
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OPENSSL_free(ret);
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return NULL;
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}
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ret->libctx = libctx;
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ret->meth = DH_get_default_method();
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#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
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ret->flags = ret->meth->flags; /* early default init */
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if (engine) {
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if (!ENGINE_init(engine)) {
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ERR_raise(ERR_LIB_DH, ERR_R_ENGINE_LIB);
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goto err;
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}
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ret->engine = engine;
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} else
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ret->engine = ENGINE_get_default_DH();
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if (ret->engine) {
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ret->meth = ENGINE_get_DH(ret->engine);
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if (ret->meth == NULL) {
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ERR_raise(ERR_LIB_DH, ERR_R_ENGINE_LIB);
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goto err;
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}
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}
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#endif
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ret->flags = ret->meth->flags;
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#ifndef FIPS_MODULE
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if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data))
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goto err;
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#endif /* FIPS_MODULE */
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ossl_ffc_params_init(&ret->params);
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if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
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ERR_raise(ERR_LIB_DH, ERR_R_INIT_FAIL);
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goto err;
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}
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return ret;
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err:
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DH_free(ret);
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return NULL;
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}
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void DH_free(DH *r)
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{
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int i;
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if (r == NULL)
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return;
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CRYPTO_DOWN_REF(&r->references, &i);
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REF_PRINT_COUNT("DH", r);
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if (i > 0)
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return;
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REF_ASSERT_ISNT(i < 0);
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if (r->meth != NULL && r->meth->finish != NULL)
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r->meth->finish(r);
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#if !defined(FIPS_MODULE)
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# if !defined(OPENSSL_NO_ENGINE)
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ENGINE_finish(r->engine);
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# endif
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
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#endif
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CRYPTO_THREAD_lock_free(r->lock);
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CRYPTO_FREE_REF(&r->references);
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ossl_ffc_params_cleanup(&r->params);
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BN_clear_free(r->pub_key);
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BN_clear_free(r->priv_key);
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OPENSSL_free(r);
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}
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int DH_up_ref(DH *r)
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{
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int i;
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if (CRYPTO_UP_REF(&r->references, &i) <= 0)
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return 0;
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REF_PRINT_COUNT("DH", r);
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REF_ASSERT_ISNT(i < 2);
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return ((i > 1) ? 1 : 0);
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}
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void ossl_dh_set0_libctx(DH *d, OSSL_LIB_CTX *libctx)
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{
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d->libctx = libctx;
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}
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#ifndef FIPS_MODULE
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int DH_set_ex_data(DH *d, int idx, void *arg)
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{
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return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
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}
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void *DH_get_ex_data(const DH *d, int idx)
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{
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return CRYPTO_get_ex_data(&d->ex_data, idx);
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}
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#endif
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int DH_bits(const DH *dh)
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{
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if (dh->params.p != NULL)
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return BN_num_bits(dh->params.p);
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return -1;
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}
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int DH_size(const DH *dh)
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{
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if (dh->params.p != NULL)
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return BN_num_bytes(dh->params.p);
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return -1;
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}
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int DH_security_bits(const DH *dh)
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{
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int N;
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if (dh->params.q != NULL)
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N = BN_num_bits(dh->params.q);
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else if (dh->length)
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N = dh->length;
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else
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N = -1;
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if (dh->params.p != NULL)
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return BN_security_bits(BN_num_bits(dh->params.p), N);
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return -1;
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}
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void DH_get0_pqg(const DH *dh,
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const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
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{
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ossl_ffc_params_get0_pqg(&dh->params, p, q, g);
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}
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int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
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{
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/*
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* If the fields p and g in dh are NULL, the corresponding input
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* parameters MUST be non-NULL. q may remain NULL.
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*/
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if ((dh->params.p == NULL && p == NULL)
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|| (dh->params.g == NULL && g == NULL))
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return 0;
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ossl_ffc_params_set0_pqg(&dh->params, p, q, g);
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ossl_dh_cache_named_group(dh);
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dh->dirty_cnt++;
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return 1;
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}
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long DH_get_length(const DH *dh)
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{
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return dh->length;
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}
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int DH_set_length(DH *dh, long length)
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{
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dh->length = length;
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dh->dirty_cnt++;
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return 1;
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}
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void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)
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{
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if (pub_key != NULL)
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*pub_key = dh->pub_key;
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if (priv_key != NULL)
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*priv_key = dh->priv_key;
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}
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int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)
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{
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if (pub_key != NULL) {
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BN_clear_free(dh->pub_key);
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dh->pub_key = pub_key;
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}
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if (priv_key != NULL) {
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BN_clear_free(dh->priv_key);
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dh->priv_key = priv_key;
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}
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dh->dirty_cnt++;
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return 1;
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}
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const BIGNUM *DH_get0_p(const DH *dh)
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{
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return dh->params.p;
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}
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const BIGNUM *DH_get0_q(const DH *dh)
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{
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return dh->params.q;
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}
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const BIGNUM *DH_get0_g(const DH *dh)
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{
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return dh->params.g;
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}
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const BIGNUM *DH_get0_priv_key(const DH *dh)
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{
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return dh->priv_key;
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}
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const BIGNUM *DH_get0_pub_key(const DH *dh)
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{
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return dh->pub_key;
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}
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void DH_clear_flags(DH *dh, int flags)
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{
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dh->flags &= ~flags;
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}
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int DH_test_flags(const DH *dh, int flags)
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{
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return dh->flags & flags;
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}
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void DH_set_flags(DH *dh, int flags)
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{
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dh->flags |= flags;
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}
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#ifndef FIPS_MODULE
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ENGINE *DH_get0_engine(DH *dh)
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{
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return dh->engine;
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}
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#endif /*FIPS_MODULE */
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FFC_PARAMS *ossl_dh_get0_params(DH *dh)
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{
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return &dh->params;
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}
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int ossl_dh_get0_nid(const DH *dh)
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{
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return dh->params.nid;
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}
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