* crypt/crypt-private.h: Include stdbool.h.

(_ufc_setup_salt_r): Return bool.
* crypt/crypt-entry.c: Include errno.h.
(__crypt_r): Return NULL with EINVAL for bad salt.
* crypt/crypt_util.c (bad_for_salt): New.
(_ufc_setup_salt_r): Check that salt is long enough and within
the specified alphabet.
* crypt/badsalttest.c: New file.
* crypt/Makefile (tests): Add it.
($(objpfx)badsalttest): New.

1 files changed, 86 insertions, 0 deletions

diff --git a/crypt/badsalttest.c b/crypt/badsalttest.c
new file mode 100644
index 0000000000..e0e207bac3
--- /dev/null
+++ b/crypt/badsalttest.c
@@ -0,0 +1,86 @@
+/* Test program for bad DES salt detection in crypt.
+   Copyright (C) 2012 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];
+    }
+
+  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 TIMEOUT 5
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"