lib/hcrypto/common.c

   1 /*
   2  * Copyright (c) 2010 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <config.h>
  37 #include <roken.h>
  38
  39 #include <krb5-types.h>
  40 #include <rfc2459_asn1.h>
  41 #include <hcrypto/bn.h>
  42
  43
  44 #include "common.h"
  45
  46 int
  47 _hc_BN_to_integer(BIGNUM *bn, heim_integer *integer)
  48 {
  49     integer->length = BN_num_bytes(bn);
  50     integer->data = malloc(integer->length);
  51     if (integer->data == NULL)
  52         return ENOMEM;
  53     BN_bn2bin(bn, integer->data);
  54     integer->negative = BN_is_negative(bn);
  55     return 0;
  56 }
  57
  58 BIGNUM *
  59 _hc_integer_to_BN(const heim_integer *i, BIGNUM *bn)
  60 {
  61     bn = BN_bin2bn(i->data, i->length, bn);
  62     if (bn)
  63         BN_set_negative(bn, i->negative);
  64     return bn;
  65 }