1/*
2 * Copyright 2011-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/*
11 * DH low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14#include "internal/deprecated.h"
15
16#include <stdio.h>
17#include "internal/cryptlib.h"
18#include "dh_local.h"
19#include <openssl/bn.h>
20#include "crypto/bn_dh.h"
21
22/*
23 * Macro to make a DH structure from BIGNUM data. NB: although just copying
24 * the BIGNUM static pointers would be more efficient, we can't do that
25 * because they get wiped using BN_clear_free() when DH_free() is called.
26 */
27
28#define make_dh(x) \
29DH *DH_get_##x(void) \
30{ \
31    DH *dh = DH_new(); \
32\
33    if (dh == NULL) \
34        return NULL; \
35    dh->params.p = BN_dup(&ossl_bignum_dh##x##_p); \
36    dh->params.g = BN_dup(&ossl_bignum_dh##x##_g); \
37    dh->params.q = BN_dup(&ossl_bignum_dh##x##_q); \
38    if (dh->params.p == NULL || dh->params.q == NULL || dh->params.g == NULL) {\
39        DH_free(dh); \
40        return NULL; \
41    } \
42    return dh; \
43}
44
45make_dh(1024_160)
46make_dh(2048_224)
47make_dh(2048_256)
48