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i bet a lot of people didn't know what ssh 1.2.16 had a nice license.
well, except for the patent issues.  someone in sweden (forget their
name at the moment) cleaned out most of the patented code, and now
this code removes rsa code.  when this is done, it will link against
libssl, but the work isn't completely done yet.  then we need to bring
this up to modern days, featurewise.

/*

xmalloc.c

Author: Tatu Ylonen <ylo@cs.hut.fi>

Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                   All rights reserved

Created: Mon Mar 20 21:23:10 1995 ylo

Versions of malloc and friends that check their results, and never return
failure (they call fatal if they encounter an error).

*/

#include "includes.h"
RCSID("$Id: xmalloc.c,v 1.1 1999/09/26 20:53:38 deraadt Exp $");

#include "ssh.h"

#if 0
void *malloc(size_t size);
void *realloc(void *ptr, size_t size);
void free(void *ptr);
#endif

void *xmalloc(size_t size)
{
  void *ptr = malloc(size);
  if (ptr == NULL)
    fatal("xmalloc: out of memory (allocating %d bytes)", (int)size);
  return ptr;
}

void *xrealloc(void *ptr, size_t new_size)
{
  void *new_ptr;

  if (ptr == NULL)
    fatal("xrealloc: NULL pointer given as argument");
  new_ptr = realloc(ptr, new_size);
  if (new_ptr == NULL)
    fatal("xrealloc: out of memory (new_size %d bytes)", (int)new_size);
  return new_ptr;
}

void xfree(void *ptr)
{
  if (ptr == NULL)
    fatal("xfree: NULL pointer given as argument");
  free(ptr);
}

char *xstrdup(const char *str)
{
  char *cp = xmalloc(strlen(str) + 1);
  strcpy(cp, str);
  return cp;
}