crypto/dh/dh_prn.c

   1 /* crypto/asn1/t_pkey.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/evp.h>
  62 #include <openssl/dh.h>
  63
  64 #ifndef OPENSSL_NO_FP_API
  65 int DHparams_print_fp(FILE *fp, const DH *x)
  66         {
  67         BIO *b;
  68         int ret;
  69
  70         if ((b=BIO_new(BIO_s_file())) == NULL)
  71                 {
  72                 DHerr(DH_F_DHPARAMS_PRINT_FP,ERR_R_BUF_LIB);
  73                 return(0);
  74                 }
  75         BIO_set_fp(b,fp,BIO_NOCLOSE);
  76         ret=DHparams_print(b, x);
  77         BIO_free(b);
  78         return(ret);
  79         }
  80 #endif
  81
  82 int DHparams_print(BIO *bp, const DH *x)
  83         {
  84         unsigned char *m=NULL;
  85         int reason=ERR_R_BUF_LIB,ret=0;
  86         size_t buf_len=0, i;
  87
  88         if (x->p)
  89                 buf_len = (size_t)BN_num_bytes(x->p);
  90         else
  91                 {
  92                 reason = ERR_R_PASSED_NULL_PARAMETER;
  93                 goto err;
  94                 }
  95         if (x->g)
  96                 if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
  97                         buf_len = i;
  98         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
  99         if (m == NULL)
 100                 {
 101                 reason=ERR_R_MALLOC_FAILURE;
 102                 goto err;
 103                 }
 104
 105         if (BIO_printf(bp,"Diffie-Hellman-Parameters: (%d bit)\n",
 106                 BN_num_bits(x->p)) <= 0)
 107                 goto err;
 108         if (!ASN1_bn_print(bp,"prime:",x->p,m,4)) goto err;
 109         if (!ASN1_bn_print(bp,"generator:",x->g,m,4)) goto err;
 110         if (x->length != 0)
 111                 {
 112                 if (BIO_printf(bp,"    recommended-private-length: %d bits\n",
 113                         (int)x->length) <= 0) goto err;
 114                 }
 115         ret=1;
 116         if (0)
 117                 {
 118 err:
 119                 DHerr(DH_F_DHPARAMS_PRINT,reason);
 120                 }
 121         if (m != NULL) OPENSSL_free(m);
 122         return(ret);
 123         }
 124