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/* Test program for bad DES salt detection in crypt.
Copyright (C) 2012-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <crypt.h>
static const char *tests[][2] =
{
{ "no salt", "" },
{ "single char", "/" },
{ "first char bad", "!x" },
{ "second char bad", "Z%" },
{ "both chars bad", ":@" },
{ "un$upported algorithm", "$2$" },
{ "unsupported_algorithm", "_1" },
{ "end of page", NULL }
};
static int
do_test (void)
{
int result = 0;
struct crypt_data cd;
size_t n = sizeof (tests) / sizeof (*tests);
size_t pagesize = (size_t) sysconf (_SC_PAGESIZE);
char *page;
/* Check that crypt won't look at the second character if the first
one is invalid. */
page = mmap (NULL, pagesize * 2, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (page == MAP_FAILED)
{
perror ("mmap");
n--;
}
else
{
if (mmap (page + pagesize, pagesize, 0,
MAP_PRIVATE | MAP_ANON | MAP_FIXED,
-1, 0) != page + pagesize)
perror ("mmap 2");
page[pagesize - 1] = '*';
tests[n - 1][1] = &page[pagesize - 1];
}
/* Mark cd as initialized before first call to crypt_r. */
cd.initialized = 0;
for (size_t i = 0; i < n; i++)
{
if (crypt (tests[i][0], tests[i][1]))
{
result++;
printf ("%s: crypt returned non-NULL with salt \"%s\"\n",
tests[i][0], tests[i][1]);
}
if (crypt_r (tests[i][0], tests[i][1], &cd))
{
result++;
printf ("%s: crypt_r returned non-NULL with salt \"%s\"\n",
tests[i][0], tests[i][1]);
}
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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