/* $OpenBSD: b_dump.c,v 1.22 2021/07/11 20:18:07 beck 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.]

 */

/*

 * Stolen from tjh's ssl/ssl_trc.c stuff.

 */

#include <stdio.h>

#include <string.h>

#include <openssl/bio.h>

#define TRUNCATE

#define DUMP_WIDTH  16

#define DUMP_WIDTH_LESS_INDENT(i) (DUMP_WIDTH - ((i - (i > 6 ? 6 : i) + 3) / 4))

int

BIO_dump_cb(int (*cb)(const void *data, size_t len, void *u),

    void *u, const char *s, int len)

{

  return BIO_dump_indent_cb(cb, u, s, len, 0);

}

int

BIO_dump_indent_cb(int (*cb)(const void *data, size_t len, void *u),

    void *u, const char *s, int len, int indent)

{

  int ret = 0;

  char buf[288 + 1], tmp[20], str[128 + 1];

  int i, j, rows, trc, written;

  unsigned char ch;

  int dump_width;

  trc = 0;

#ifdef TRUNCATE

  for (; (len > 0) && ((s[len - 1] == ' ') || (s[len - 1] == '\0')); len--)

    trc++;

#endif

  if (indent < 0)

    indent = 0;

  if (indent) {

    if (indent > 128)

      indent = 128;

    memset(str, ' ', indent);

  }

  str[indent] = '\0';

  dump_width = DUMP_WIDTH_LESS_INDENT(indent);

  rows = (len / dump_width);

  if ((rows * dump_width) < len)

    rows++;

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

    strlcpy(buf, str, sizeof buf);

    snprintf(tmp, sizeof tmp, "%04x - ", i*dump_width);

    strlcat(buf, tmp, sizeof buf);

    for (j = 0; j < dump_width; j++) {

      if (((i*dump_width) + j) >= len) {

        strlcat(buf, "   ", sizeof buf);

      } else {

        ch = ((unsigned char)*(s + i*dump_width + j)) & 0xff;

        snprintf(tmp, sizeof tmp, "%02x%c", ch,

            j == 7 ? '-' : ' ');

        strlcat(buf, tmp, sizeof buf);

      }

    }

    strlcat(buf, "  ", sizeof buf);

    for (j = 0; j < dump_width; j++) {

      if (((i*dump_width) + j) >= len)

        break;

      ch = ((unsigned char)*(s + i * dump_width + j)) & 0xff;

      snprintf(tmp, sizeof tmp, "%c",

          ((ch >= ' ') && (ch <= '~')) ? ch : '.');

      strlcat(buf, tmp, sizeof buf);

    }

    strlcat(buf, "\n", sizeof buf);

    /* if this is the last call then update the ddt_dump thing so

     * that we will move the selection point in the debug window

     */

    if ((written = cb((void *)buf, strlen(buf), u)) < 0)

      return -1;

    ret += written;

  }

#ifdef TRUNCATE

  if (trc > 0) {

    snprintf(buf, sizeof buf, "%s%04x - <SPACES/NULS>\n",

        str, len + trc);

    if ((written = cb((void *)buf, strlen(buf), u)) < 0)

      return -1;

    ret += written;

  }

#endif

  return (ret);

}

static int

write_fp(const void *data, size_t len, void *fp)

{

  return fwrite(data, 1, len, fp);

}

int

BIO_dump_fp(FILE *fp, const char *s, int len)

{

  return BIO_dump_cb(write_fp, fp, s, len);

}

int

BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent)

{

  return BIO_dump_indent_cb(write_fp, fp, s, len, indent);

}

static int

write_bio(const void *data, size_t len, void *bp)

{

  return BIO_write((BIO *)bp, (const char *)data, len);

}

int

BIO_dump(BIO *bp, const char *s, int len)

{

  return BIO_dump_cb(write_bio, bp, s, len);

}

int

BIO_dump_indent(BIO *bp, const char *s, int len, int indent)

{

  return BIO_dump_indent_cb(write_bio, bp, s, len, indent);

}