xref: /openssl/crypto/dh/dh_rfc5114.c (revision 8020d79b)
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) \
29 DH *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 
45 make_dh(1024_160)
46 make_dh(2048_224)
47 make_dh(2048_256)
48