libjava/classpath/java/security/interfaces/RSAKey.java


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/* RSAKey.java --- A generic RSA Key interface
   Copyright (C) 1999 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

package java.security.interfaces;

import java.math.BigInteger;

/**
   A generic RSA Key interface for public and private keys

   @since JDK 1.3

   @author Mark Benvenuto
 */
public interface RSAKey
{
  /**
     Generates a modulus.

     @returns a modulus
   */
  BigInteger getModulus();
}

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/* Basic test of statx system call.
   Copyright (C) 2018-2020 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
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/xunistd.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <unistd.h>

/* Ensure that the types have the kernel-expected layout.  */
_Static_assert (sizeof (struct statx_timestamp) == 16, "statx_timestamp size");
_Static_assert (sizeof (struct statx) == 256, "statx size");
_Static_assert (offsetof (struct statx, stx_nlink) == 16, "statx nlink");
_Static_assert (offsetof (struct statx, stx_ino) == 32, "statx ino");
_Static_assert (offsetof (struct statx, stx_atime) == 64, "statx atime");
_Static_assert (offsetof (struct statx, stx_rdev_major) == 128, "statx rdev");
_Static_assert (offsetof (struct statx, __statx_pad2) == 144, "statx pad2");

#include "statx_generic.c"

typedef int (*statx_function) (int, const char *, int, unsigned int,
                               struct statx *);

/* Return true if we have a real implementation of statx.  */
static bool
kernel_supports_statx (void)
{
#ifdef __NR_statx
  struct statx buf;
  return syscall (__NR_statx, 0, "", AT_EMPTY_PATH, 0, &buf) == 0
    || errno != ENOSYS;
#else
  return false;
#endif
}

/* Tests which apply to both implementations.  */
static void
both_implementations_tests (statx_function impl, const char *path, int fd)
{
  uint64_t ino;
  {
    struct statx buf = { 0, };
    TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &buf), 0);
    TEST_COMPARE (buf.stx_size, 3);
    ino = buf.stx_ino;
  }
  {
    struct statx buf = { 0, };
    TEST_COMPARE (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &buf), 0);
    TEST_COMPARE (buf.stx_size, 3);
    TEST_COMPARE (buf.stx_ino, ino);
  }
  {
    struct statx stx = { 0, };
    TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &stx), 0);
    struct stat64 st;
    xfstat (fd, &st);
    TEST_COMPARE (stx.stx_mode, st.st_mode);
    TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
    TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
  }
  {
    struct statx stx = { 0, };
    TEST_COMPARE (statx (AT_FDCWD, "/dev/null", 0, STATX_BASIC_STATS, &stx),
                  0);
    struct stat64 st;
    xstat ("/dev/null", &st);
    TEST_COMPARE (stx.stx_mode, st.st_mode);
    TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
    TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
    TEST_COMPARE (stx.stx_rdev_major, major (st.st_rdev));
    TEST_COMPARE (stx.stx_rdev_minor, minor (st.st_rdev));
  }
}

/* Tests which apply only to the non-kernel (generic)
   implementation.  */
static void
non_kernel_tests (statx_function impl, int fd)
{
  /* The non-kernel implementation must always fail for explicit sync
     flags.  */
  struct statx buf;
  errno = 0;
  TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
                      STATX_BASIC_STATS, &buf), -1);
  TEST_COMPARE (errno, EINVAL);
  errno = 0;
  TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
                      STATX_BASIC_STATS, &buf), -1);
  TEST_COMPARE (errno, EINVAL);
}

static int
do_test (void)
{
  char *path;
  int fd = create_temp_file ("tst-statx-", &path);
  TEST_VERIFY_EXIT (fd >= 0);
  support_write_file_string (path, "abc");

  both_implementations_tests (&statx, path, fd);
  both_implementations_tests (&statx_generic, path, fd);

  if (kernel_supports_statx ())
    {
      puts ("info: kernel supports statx");
      struct statx buf;
      buf.stx_size = 0;
      TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
                           STATX_BASIC_STATS, &buf),
                    0);
      TEST_COMPARE (buf.stx_size, 3);
      buf.stx_size = 0;
      TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
                           STATX_BASIC_STATS, &buf),
                    0);
      TEST_COMPARE (buf.stx_size, 3);
    }
  else
    {
      puts ("info: kernel does not support statx");
      non_kernel_tests (&statx, fd);
    }
  non_kernel_tests (&statx_generic, fd);

  xclose (fd);
  free (path);

  return 0;
}

#include <support/test-driver.c>