-/* crypto/dh/dh_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the Apache License 2.0 (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
*/
+/*
+ * DH low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
+
#include <stdio.h>
-#include "cryptlib.h"
#include <openssl/bn.h>
-#include <openssl/dh.h>
+#ifndef FIPS_MODULE
+# include <openssl/engine.h>
+#endif
+#include <openssl/obj_mac.h>
+#include <openssl/core_names.h>
+#include "internal/cryptlib.h"
+#include "internal/refcount.h"
+#include "crypto/evp.h"
+#include "crypto/dh.h"
+#include "dh_local.h"
-const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
+static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx);
+#ifndef FIPS_MODULE
+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;
+}
+
+const DH_METHOD *ossl_dh_get_method(const DH *dh)
+{
+ return dh->meth;
+}
+# ifndef OPENSSL_NO_DEPRECATED_3_0
DH *DH_new(void)
- {
- DH *ret;
-
- ret=(DH *)Malloc(sizeof(DH));
- if (ret == NULL)
- {
- DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- ret->pad=0;
- ret->version=0;
- ret->p=NULL;
- ret->g=NULL;
- ret->length=0;
- ret->pub_key=NULL;
- ret->priv_key=NULL;
- ret->flags=DH_FLAG_CACHE_MONT_P;
- ret->method_mont_p=NULL;
- return(ret);
- }
+{
+ return dh_new_intern(NULL, NULL);
+}
+# endif
+
+DH *DH_new_method(ENGINE *engine)
+{
+ return dh_new_intern(engine, NULL);
+}
+#endif /* !FIPS_MODULE */
+
+DH *ossl_dh_new_ex(OSSL_LIB_CTX *libctx)
+{
+ return dh_new_intern(NULL, libctx);
+}
+
+static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx)
+{
+ DH *ret = OPENSSL_zalloc(sizeof(*ret));
+
+ if (ret == NULL)
+ return NULL;
+
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ ERR_raise(ERR_LIB_DH, ERR_R_CRYPTO_LIB);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ if (!CRYPTO_NEW_REF(&ret->references, 1)) {
+ CRYPTO_THREAD_lock_free(ret->lock);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ ret->libctx = libctx;
+ ret->meth = DH_get_default_method();
+#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
+ ret->flags = ret->meth->flags; /* early default init */
+ if (engine) {
+ if (!ENGINE_init(engine)) {
+ ERR_raise(ERR_LIB_DH, 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) {
+ ERR_raise(ERR_LIB_DH, ERR_R_ENGINE_LIB);
+ goto err;
+ }
+ }
+#endif
+
+ ret->flags = ret->meth->flags;
+
+#ifndef FIPS_MODULE
+ if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data))
+ goto err;
+#endif /* FIPS_MODULE */
+
+ ossl_ffc_params_init(&ret->params);
+
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+ ERR_raise(ERR_LIB_DH, ERR_R_INIT_FAIL);
+ goto err;
+ }
+
+ return ret;
+
+ err:
+ DH_free(ret);
+ return NULL;
+}
void DH_free(DH *r)
- {
- if(r == NULL) return;
- if (r->p != NULL) BN_clear_free(r->p);
- if (r->g != NULL) BN_clear_free(r->g);
- if (r->pub_key != NULL) BN_clear_free(r->pub_key);
- if (r->priv_key != NULL) BN_clear_free(r->priv_key);
- if (r->method_mont_p != NULL)
- BN_MONT_CTX_free((BN_MONT_CTX *)r->method_mont_p);
- Free(r);
- }
-
-int DH_size(DH *dh)
- {
- return(BN_num_bytes(dh->p));
- }
+{
+ int i;
+
+ if (r == NULL)
+ return;
+
+ CRYPTO_DOWN_REF(&r->references, &i);
+ 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);
+#if !defined(FIPS_MODULE)
+# if !defined(OPENSSL_NO_ENGINE)
+ ENGINE_finish(r->engine);
+# endif
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
+#endif
+
+ CRYPTO_THREAD_lock_free(r->lock);
+ CRYPTO_FREE_REF(&r->references);
+
+ ossl_ffc_params_cleanup(&r->params);
+ 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) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("DH", r);
+ REF_ASSERT_ISNT(i < 2);
+ return ((i > 1) ? 1 : 0);
+}
+
+void ossl_dh_set0_libctx(DH *d, OSSL_LIB_CTX *libctx)
+{
+ d->libctx = libctx;
+}
+
+#ifndef FIPS_MODULE
+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(const DH *d, int idx)
+{
+ return CRYPTO_get_ex_data(&d->ex_data, idx);
+}
+#endif
+
+int DH_bits(const DH *dh)
+{
+ if (dh->params.p != NULL)
+ return BN_num_bits(dh->params.p);
+ return -1;
+}
+
+int DH_size(const DH *dh)
+{
+ if (dh->params.p != NULL)
+ return BN_num_bytes(dh->params.p);
+ return -1;
+}
+
+int DH_security_bits(const DH *dh)
+{
+ int N;
+
+ if (dh->params.q != NULL)
+ N = BN_num_bits(dh->params.q);
+ else if (dh->length)
+ N = dh->length;
+ else
+ N = -1;
+ if (dh->params.p != NULL)
+ return BN_security_bits(BN_num_bits(dh->params.p), N);
+ return -1;
+}
+
+void DH_get0_pqg(const DH *dh,
+ const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
+{
+ ossl_ffc_params_get0_pqg(&dh->params, p, q, g);
+}
+
+int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /*
+ * If the fields p and g in dh are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ */
+ if ((dh->params.p == NULL && p == NULL)
+ || (dh->params.g == NULL && g == NULL))
+ return 0;
+
+ ossl_ffc_params_set0_pqg(&dh->params, p, q, g);
+ ossl_dh_cache_named_group(dh);
+ dh->dirty_cnt++;
+ return 1;
+}
+
+long DH_get_length(const DH *dh)
+{
+ return dh->length;
+}
+
+int DH_set_length(DH *dh, long length)
+{
+ dh->length = length;
+ dh->dirty_cnt++;
+ 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;
+ }
+
+ dh->dirty_cnt++;
+ return 1;
+}
+
+const BIGNUM *DH_get0_p(const DH *dh)
+{
+ return dh->params.p;
+}
+
+const BIGNUM *DH_get0_q(const DH *dh)
+{
+ return dh->params.q;
+}
+
+const BIGNUM *DH_get0_g(const DH *dh)
+{
+ return dh->params.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;
+}
+
+#ifndef FIPS_MODULE
+ENGINE *DH_get0_engine(DH *dh)
+{
+ return dh->engine;
+}
+#endif /*FIPS_MODULE */
+
+FFC_PARAMS *ossl_dh_get0_params(DH *dh)
+{
+ return &dh->params;
+}
+int ossl_dh_get0_nid(const DH *dh)
+{
+ return dh->params.nid;
+}
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