/* $OpenBSD: t_pkey.c,v 1.17 2021/12/04 16:08:32 tb Exp $ */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <stdio.h>

#include <openssl/bn.h>

#include <openssl/buffer.h>

#include <openssl/objects.h>

#include "bn_lcl.h"

int

ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,

    unsigned char *buf, int off)

{

  int n, i;

  const char *neg;

  if (num == NULL)

    return (1);

  neg = (BN_is_negative(num)) ? "-" : "";

  if (!BIO_indent(bp, off, 128))

    return 0;

  if (BN_is_zero(num)) {

    if (BIO_printf(bp, "%s 0\n", number) <= 0)

      return 0;

    return 1;

  }

  if (BN_num_bytes(num) <= BN_BYTES) {

    if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,

        (unsigned long)num->d[0], neg,

        (unsigned long)num->d[0]) <= 0)

      return (0);

  } else {

    buf[0] = 0;

    if (BIO_printf(bp, "%s%s", number,

        (neg[0] == '-') ? " (Negative)" : "") <= 0)

      return (0);

    n = BN_bn2bin(num, &buf[1]);

    if (buf[1] & 0x80)

      n++;

    else

      buf++;

    for (i = 0; i < n; i++) {

      if ((i % 15) == 0) {

        if (BIO_puts(bp, "\n") <= 0 ||

            !BIO_indent(bp, off + 4, 128))

          return 0;

      }

      if (BIO_printf(bp, "%02x%s", buf[i],

          ((i + 1) == n) ? "" : ":") <= 0)

        return (0);

    }

    if (BIO_write(bp, "\n", 1) <= 0)

      return (0);

  }

  return (1);

}