openssl/crypto/bio/b_dump.c

/* crypto/bio/b_dump.c */
/* Copyright (C) 1995-1997 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 "cryptlib.h"
#include "bio.h"

#define TRUNCATE
#define DUMP_WIDTH	16

int BIO_dump(bio,s,len)
BIO *bio;
char *s;
int len;
{
  int ret=0;
  char buf[160+1],tmp[20];
  int i,j,rows,trunc;
  unsigned char ch;

  trunc=0;

#ifdef TRUNCATE
  for(; (len > 0) && ((s[len-1] == ' ') || (s[len-1] == '\0')); len--) 
    trunc++;
#endif

  rows=(len/DUMP_WIDTH);
  if ((rows*DUMP_WIDTH)<len)
    rows++;
  for(i=0;i<rows;i++) {
    buf[0]='\0';	/* start with empty string */
    sprintf(tmp,"%04x - ",i*DUMP_WIDTH);
    strcpy(buf,tmp);
    for(j=0;j<DUMP_WIDTH;j++) {
      if (((i*DUMP_WIDTH)+j)>=len) {
	strcat(buf,"   ");
      } else {
        ch=((unsigned char)*((char *)(s)+i*DUMP_WIDTH+j)) & 0xff;
	sprintf(tmp,"%02x%c",ch,j==7?'-':' ');
        strcat(buf,tmp);
      }
    }
    strcat(buf,"  ");
    for(j=0;j<DUMP_WIDTH;j++) {
      if (((i*DUMP_WIDTH)+j)>=len)
	break;
      ch=((unsigned char)*((char *)(s)+i*DUMP_WIDTH+j)) & 0xff;
      sprintf(tmp,"%c",((ch>=' ')&&(ch<='~'))?ch:'.');
      strcat(buf,tmp);
    }
    strcat(buf,"\n");
    /* if this is the last call then update the ddt_dump thing so that
     * we will move the selection point in the debug window 
     */
    ret+=BIO_write(bio,(char *)buf,strlen(buf));
  }
#ifdef TRUNCATE
  if (trunc > 0) {
    sprintf(buf,"%04x - <SPACES/NULS>\n",len+trunc);
    ret+=BIO_write(bio,(char *)buf,strlen(buf));
  }
#endif
  return(ret);
}