crypto/dh/dh_rfc5114.c

   1 /*
   2  * Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include "dh_locl.h"
  13 #include <openssl/bn.h>
  14 #include "internal/bn_dh.h"
  15
  16 /*
  17  * Macro to make a DH structure from BIGNUM data. NB: although just copying
  18  * the BIGNUM static pointers would be more efficient, we can't do that
  19  * because they get wiped using BN_clear_free() when DH_free() is called.
  20  */
  21
  22 #define make_dh(x) \
  23 DH *DH_get_##x(void) \
  24 { \
  25     DH *dh = DH_new(); \
  26 \
  27     if (dh == NULL) \
  28         return NULL; \
  29     dh->p = BN_dup(&_bignum_dh##x##_p); \
  30     dh->g = BN_dup(&_bignum_dh##x##_g); \
  31     dh->q = BN_dup(&_bignum_dh##x##_q); \
  32     if (dh->p == NULL || dh->q == NULL || dh->g == NULL) {\
  33         DH_free(dh); \
  34         return NULL; \
  35     } \
  36     return dh; \
  37 }
  38
  39 make_dh(1024_160)
  40 make_dh(2048_224)
  41 make_dh(2048_256)