crypto/dh/dh_rfc5114.c

   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)