lib/libcrypto/asn1/t_pkey.c

   1 /* $OpenBSD: t_pkey.c,v 1.16 2014/07/11 08:44:47 jsing Exp $ */
   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
  61 #include <openssl/bn.h>
  62 #include <openssl/buffer.h>
  63 #include <openssl/objects.h>
  64
  65 int
  66 ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
  67     unsigned char *buf, int off)
  68 {
  69         int n, i;
  70         const char *neg;
  71
  72         if (num == NULL)
  73                 return (1);
  74         neg = (BN_is_negative(num)) ? "-" : "";
  75         if (!BIO_indent(bp, off, 128))
  76                 return 0;
  77         if (BN_is_zero(num)) {
  78                 if (BIO_printf(bp, "%s 0\n", number) <= 0)
  79                         return 0;
  80                 return 1;
  81         }
  82
  83         if (BN_num_bytes(num) <= BN_BYTES) {
  84                 if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
  85                     (unsigned long)num->d[0], neg,
  86                     (unsigned long)num->d[0]) <= 0)
  87                         return (0);
  88         } else {
  89                 buf[0] = 0;
  90                 if (BIO_printf(bp, "%s%s", number,
  91                     (neg[0] == '-') ? " (Negative)" : "") <= 0)
  92                         return (0);
  93                 n = BN_bn2bin(num, &buf[1]);
  94
  95                 if (buf[1] & 0x80)
  96                         n++;
  97                 else
  98                         buf++;
  99
 100                 for (i = 0; i < n; i++) {
 101                         if ((i % 15) == 0) {
 102                                 if (BIO_puts(bp, "\n") <= 0 ||
 103                                     !BIO_indent(bp, off + 4, 128))
 104                                         return 0;
 105                         }
 106                         if (BIO_printf(bp, "%02x%s", buf[i],
 107                             ((i + 1) == n) ? "" : ":") <= 0)
 108                                 return (0);
 109                 }
 110                 if (BIO_write(bp, "\n", 1) <= 0)
 111                         return (0);
 112         }
 113         return (1);
 114 }