Pintos: pintos/src/tests/vm/page-linear.c Source File

00001 /* Encrypts, then decrypts, 2 MB of memory and verifies that the
00002    values are as they should be. */
00003 
00004 #include <string.h>
00005 #include "tests/arc4.h"
00006 #include "tests/lib.h"
00007 #include "tests/main.h"
00008 
00009 #define SIZE (2 * 1024 * 1024)
00010 
00011 static char buf[SIZE];
00012 
00013 void
00014 test_main (void)
00015 {
00016   struct arc4 arc4;
00017   size_t i;
00018 
00019   /* Initialize to 0x5a. */
00020   msg ("initialize");
00021   memset (buf, 0x5a, sizeof buf);
00022 
00023   /* Check that it's all 0x5a. */
00024   msg ("read pass");
00025   for (i = 0; i < SIZE; i++)
00026     if (buf[i] != 0x5a)
00027       fail ("byte %zu != 0x5a", i);
00028 
00029   /* Encrypt zeros. */
00030   msg ("read/modify/write pass one");
00031   arc4_init (&arc4, "foobar", 6);
00032   arc4_crypt (&arc4, buf, SIZE);
00033 
00034   /* Decrypt back to zeros. */
00035   msg ("read/modify/write pass two");
00036   arc4_init (&arc4, "foobar", 6);
00037   arc4_crypt (&arc4, buf, SIZE);
00038 
00039   /* Check that it's all 0x5a. */
00040   msg ("read pass");
00041   for (i = 0; i < SIZE; i++)
00042     if (buf[i] != 0x5a)
00043       fail ("byte %zu != 0x5a", i);
00044 }