child-linear.c

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/** Child process of page-parallel.
   Encrypts 1 MB of zeros, then decrypts it, and ensures that
   the zeros are back. */
 
#include <string.h>
#include "tests/arc4.h"
#include "tests/lib.h"
#include "tests/main.h"
 
const char *test_name = "child-linear";
 
#define SIZE (1024 * 1024)
static char buf[SIZE];
 
int
main (int argc, char *argv[])
{
  const char *key = argv[argc - 1];
  struct arc4 arc4;
  size_t i;
 
  /* Encrypt zeros. */
  arc4_init (&arc4, key, strlen (key));
  arc4_crypt (&arc4, buf, SIZE);
 
  /* Decrypt back to zeros. */
  arc4_init (&arc4, key, strlen (key));
  arc4_crypt (&arc4, buf, SIZE);
 
  /* Check that it's all zeros. */
  for (i = 0; i < SIZE; i++)
    if (buf[i] != '\0')
      fail ("byte %zu != 0", i);
 
  return 0x42;
}