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1/* Test program for bad DES salt detection in crypt.
2 Copyright (C) 2012-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <stdio.h>
20#include <unistd.h>
21#include <sys/mman.h>
22#include <crypt.h>
23
24static const char *tests[][2] =
25 {
26 { "no salt", "" },
27 { "single char", "/" },
28 { "first char bad", "!x" },
29 { "second char bad", "Z%" },
30 { "both chars bad", ":@" },
31 { "un$upported algorithm", "$2$" },
32 { "unsupported_algorithm", "_1" },
33 { "end of page", NULL }
34 };
35
36static int
37do_test (void)
38{
39 int result = 0;
40 struct crypt_data cd;
41 size_t n = sizeof (tests) / sizeof (*tests);
42 size_t pagesize = (size_t) sysconf (_SC_PAGESIZE);
43 char *page;
44
45 /* Check that crypt won't look at the second character if the first
46 one is invalid. */
47 page = mmap (NULL, pagesize * 2, PROT_READ | PROT_WRITE,
48 MAP_PRIVATE | MAP_ANON, -1, 0);
49 if (page == MAP_FAILED)
50 {
51 perror ("mmap");
52 n--;
53 }
54 else
55 {
56 if (mmap (page + pagesize, pagesize, 0,
57 MAP_PRIVATE | MAP_ANON | MAP_FIXED,
58 -1, 0) != page + pagesize)
59 perror ("mmap 2");
60 page[pagesize - 1] = '*';
61 tests[n - 1][1] = &page[pagesize - 1];
62 }
63
64 /* Mark cd as initialized before first call to crypt_r. */
65 cd.initialized = 0;
66
67 for (size_t i = 0; i < n; i++)
68 {
69 if (crypt (tests[i][0], tests[i][1]))
70 {
71 result++;
72 printf ("%s: crypt returned non-NULL with salt \"%s\"\n",
73 tests[i][0], tests[i][1]);
74 }
75
76 if (crypt_r (tests[i][0], tests[i][1], &cd))
77 {
78 result++;
79 printf ("%s: crypt_r returned non-NULL with salt \"%s\"\n",
80 tests[i][0], tests[i][1]);
81 }
82 }
83
84 return result;
85}
86
87#define TEST_FUNCTION do_test ()
88#include "../test-skeleton.c"
89

Warning: That file was not part of the compilation database. It may have many parsing errors.