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/*
cipelib - library routines common to CIPE (user-mode part) and PKCIPE
Copyright 2000 Olaf Titz <olaf@bigred.inka.de>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
2 of the License, or (at your option) any later version.
*/
/* $Id: hexstr.c,v 1.4 2000/12/13 01:38:56 olaf Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include "cipelib.h"
extern const char cipelib_HEX[];
#define HEX cipelib_HEX
#ifndef NULL
#define NULL 0
#endif
#define CHUNK 128 /* power of two! */
char *hexstr(const void *d, int l)
{
static char *buf=NULL;
static int bufl=0;
register const unsigned char *p=d;
register int i, j;
i=2*l+1;
if (i>bufl) {
bufl=(i+CHUNK)&(~(CHUNK-1));
if (!(buf=realloc(buf, bufl))) {
bufl=0;
fprintf(stderr, "hexstr: malloc failure\n");
return NULL;
}
/* This routine is used on secret keys, so lock the buffer */
if (mlock(buf, bufl)<0)
cipe_syslog(LOG_ERR, "hexstr: mlock: %m"); /* not fatal */
}
for (i=j=0; i<l; ++p,++i) {
buf[j++]=HEX[*p>>4];
buf[j++]=HEX[*p&15];
}
buf[j]='\0';
return buf;
}
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