mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
* lib/fileutils.rb (remove_entry_secure): add documentation.
* lib/fileutils.rb (remove_entry_secure): should not invoke unlink(2) against a directory. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
aamine
parent
0d5b973720
commit
98855e4a27
3 changed files with 84 additions and 39 deletions
|
|
@ -1,3 +1,10 @@
|
|||
Thu May 26 20:31:21 2005 Minero Aoki <aamine@loveruby.net>
|
||||
|
||||
* lib/fileutils.rb (remove_entry_secure): add documentation.
|
||||
|
||||
* lib/fileutils.rb (remove_entry_secure): should not invoke
|
||||
unlink(2) against a directory.
|
||||
|
||||
Thu May 26 08:29:19 2005 Akiyoshi, Masamichi <akiyoshi@hp.com>
|
||||
|
||||
* vms/vmsruby_private.c, vms/vmsruby_private.h: private routines
|
||||
|
|
|
|||
|
|
@ -248,7 +248,6 @@ module FileUtils
|
|||
list = fu_list(list)
|
||||
fu_output_message "rmdir #{list.join ' '}" if options[:verbose]
|
||||
return if options[:noop]
|
||||
|
||||
list.each do |dir|
|
||||
Dir.rmdir dir.sub(%r</\z>, '')
|
||||
end
|
||||
|
|
@ -259,7 +258,7 @@ module FileUtils
|
|||
#
|
||||
# Options: force noop verbose
|
||||
#
|
||||
# <b><tt>ln( old, new, options = {} )</tt></b>
|
||||
# <b><tt>ln(old, new, options = {})</tt></b>
|
||||
#
|
||||
# Creates a hard link +new+ which points to +old+.
|
||||
# If +new+ already exists and it is a directory, creates a symbolic link +new/old+.
|
||||
|
|
@ -269,20 +268,19 @@ module FileUtils
|
|||
# FileUtils.ln 'gcc', 'cc', :verbose => true
|
||||
# FileUtils.ln '/usr/bin/emacs21', '/usr/bin/emacs'
|
||||
#
|
||||
# <b><tt>ln( list, destdir, options = {} )</tt></b>
|
||||
# <b><tt>ln(list, destdir, options = {})</tt></b>
|
||||
#
|
||||
# Creates several hard links in a directory, with each one pointing to the
|
||||
# item in +list+. If +destdir+ is not a directory, raises Errno::ENOTDIR.
|
||||
#
|
||||
# include FileUtils
|
||||
# cd '/bin'
|
||||
# ln %w(cp mv mkdir), '/usr/bin' # Now /usr/bin/cp and /bin/cp are linked.
|
||||
# cd '/sbin'
|
||||
# FileUtils.ln %w(cp mv mkdir), '/bin' # Now /sbin/cp and /bin/cp are linked.
|
||||
#
|
||||
def ln(src, dest, options = {})
|
||||
fu_check_options options, :force, :noop, :verbose
|
||||
fu_output_message "ln#{options[:force] ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
|
||||
return if options[:noop]
|
||||
|
||||
fu_each_src_dest0(src, dest) do |s,d|
|
||||
remove_file d, true if options[:force]
|
||||
File.link s, d
|
||||
|
|
@ -297,7 +295,7 @@ module FileUtils
|
|||
#
|
||||
# Options: force noop verbose
|
||||
#
|
||||
# <b><tt>ln_s( old, new, options = {} )</tt></b>
|
||||
# <b><tt>ln_s(old, new, options = {})</tt></b>
|
||||
#
|
||||
# Creates a symbolic link +new+ which points to +old+. If +new+ already
|
||||
# exists and it is a directory, creates a symbolic link +new/old+. If +new+
|
||||
|
|
@ -307,7 +305,7 @@ module FileUtils
|
|||
# FileUtils.ln_s '/usr/bin/ruby', '/usr/local/bin/ruby'
|
||||
# FileUtils.ln_s 'verylongsourcefilename.c', 'c', :force => true
|
||||
#
|
||||
# <b><tt>ln_s( list, destdir, options = {} )</tt></b>
|
||||
# <b><tt>ln_s(list, destdir, options = {})</tt></b>
|
||||
#
|
||||
# Creates several symbolic links in a directory, with each one pointing to the
|
||||
# item in +list+. If +destdir+ is not a directory, raises Errno::ENOTDIR.
|
||||
|
|
@ -320,7 +318,6 @@ module FileUtils
|
|||
fu_check_options options, :force, :noop, :verbose
|
||||
fu_output_message "ln -s#{options[:force] ? 'f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
|
||||
return if options[:noop]
|
||||
|
||||
fu_each_src_dest0(src, dest) do |s,d|
|
||||
remove_file d, true if options[:force]
|
||||
File.symlink s, d
|
||||
|
|
@ -470,7 +467,7 @@ module FileUtils
|
|||
begin
|
||||
if destent.exist?
|
||||
if destent.directory?
|
||||
raise Errno::EISDIR, dest
|
||||
raise Errno::EEXIST, dest
|
||||
else
|
||||
destent.remove_file if rename_cannot_overwrite_file?
|
||||
end
|
||||
|
|
@ -551,20 +548,21 @@ module FileUtils
|
|||
# FileUtils.rm_r Dir.glob('/tmp/*')
|
||||
# FileUtils.rm_r '/', :force => true # :-)
|
||||
#
|
||||
# SECURITY WARNING: This method causes local vulnerability
|
||||
# WARNING: This method causes local vulnerability
|
||||
# if one of parent directories or removing directory tree are world
|
||||
# writable, and the current process has strong privilege such as Unix
|
||||
# super user (root). For secure removing, set :secure option to true.
|
||||
# Default is :secure=>true.
|
||||
# super user (root). For secure removing, read the documentation of
|
||||
# #remove_entry_secure, and set :secure option to true.
|
||||
# Default is :secure=>false.
|
||||
#
|
||||
# NOTE: This method calls #remove_entry_secure if :secure option is set.
|
||||
# See also #remove_entry_secure.
|
||||
#
|
||||
# NOTE: Currently, :secure option does not affect Win32 system.
|
||||
# WARNING: Currently, :secure option does not affect Win32 system.
|
||||
#
|
||||
def rm_r(list, options = {})
|
||||
fu_check_options options, :force, :noop, :verbose, :secure
|
||||
options[:secure] = true unless options.key?(:secure)
|
||||
# options[:secure] = true unless options.key?(:secure)
|
||||
list = fu_list(list)
|
||||
fu_output_message "rm -r#{options[:force] ? 'f' : ''} #{list.join ' '}" if options[:verbose]
|
||||
return if options[:noop]
|
||||
|
|
@ -586,7 +584,7 @@ module FileUtils
|
|||
#
|
||||
# #rm_r(list, :force => true)
|
||||
#
|
||||
# WARNING: This method causes security vulnerability.
|
||||
# WARNING: This method causes local vulnerability.
|
||||
# Read the documentation of #rm_r first.
|
||||
#
|
||||
def rm_rf(list, options = {})
|
||||
|
|
@ -602,18 +600,30 @@ module FileUtils
|
|||
OPT_TABLE['rmtree'] = %w( noop verbose secure )
|
||||
|
||||
#
|
||||
# This method removes a file system entry +path+.
|
||||
# +path+ shall be a regular file, a directory, or something.
|
||||
# If +path+ is a directory, remove it recursively.
|
||||
# This method is required to avoid TOCTTOU (time-of-check-to-time-of-use)
|
||||
# security vulnerability of #rm_r.
|
||||
# This method removes a file system entry +path+. +path+ shall be a
|
||||
# regular file, a directory, or something. If +path+ is a directory,
|
||||
# remove it recursively. This method is required to avoid TOCTTOU
|
||||
# (time-of-check-to-time-of-use) local security vulnerability of #rm_r.
|
||||
# #rm_r causes security hole when and only when:
|
||||
#
|
||||
# * Parent directory is world writable (including /tmp).
|
||||
# * Removing directory tree includes world writable directory.
|
||||
#
|
||||
# To avoid this security hole, this method applies special preprocess.
|
||||
# If +path+ is a directory, this method chown(2) and chmod(2) all
|
||||
# removing directories. This requires the current process must be
|
||||
# a super user (root), or the owner of the removing whole directory tree.
|
||||
# removing directories. This requires the current process is the
|
||||
# owner of the removing whole directory tree.
|
||||
#
|
||||
# When parent directory is /tmp (permission 1777), UNIX super user
|
||||
# (root) can remove directory tree safely only on systems which
|
||||
# lchown(2) clears S_ISUID (set-user-id) bit, such as Linux.
|
||||
# Many systems do NOT clear S_ISUID bit, this method is insecure for
|
||||
# cleaning /tmp. Note that, if parent directory is not world writable,
|
||||
# this method is secure for also super user.
|
||||
#
|
||||
# WARNING: You must ensure that *ALL* parent directories are not
|
||||
# world writable. Otherwise this method does not work.
|
||||
# Only exception is /tmp, permission 1777.
|
||||
#
|
||||
# WARNING: Only the owner of the removing directory tree, or
|
||||
# super user (root) should invoke this method. Otherwise this
|
||||
|
|
@ -633,14 +643,17 @@ module FileUtils
|
|||
# For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].
|
||||
#
|
||||
def remove_entry_secure(path, force = false)
|
||||
fu_try_unlink path and return # Remove non-directory files.
|
||||
# for /tmp (perm=1777)
|
||||
if fu_have_symlink?
|
||||
File.lchown Process.euid, nil, path
|
||||
else
|
||||
File.chown Process.euid, nil, path
|
||||
end
|
||||
# ---- now lstat(2) becomes secure ----
|
||||
fu_try_unlink path and return # Ensure a file is a directory
|
||||
unless File.lstat(path).directory?
|
||||
File.unlink path
|
||||
return
|
||||
end
|
||||
root = Entry_.new(path)
|
||||
root.preorder_traverse do |ent|
|
||||
if ent.directory?
|
||||
|
|
@ -674,14 +687,6 @@ module FileUtils
|
|||
return true
|
||||
end
|
||||
|
||||
def fu_try_unlink(path) #:nodoc:
|
||||
File.unlink path
|
||||
return true
|
||||
rescue Errno::EISDIR
|
||||
return false
|
||||
end
|
||||
private :fu_try_unlink
|
||||
|
||||
#
|
||||
# This method removes a file system entry +path+.
|
||||
# +path+ might be a regular file, a directory, or something.
|
||||
|
|
|
|||
|
|
@ -315,11 +315,11 @@ end
|
|||
# [ruby-talk:124368]
|
||||
mkdir 'tmp/tmpdir'
|
||||
mkdir_p 'tmp/dest2/tmpdir'
|
||||
assert_raises(Errno::EISDIR) {
|
||||
assert_raises(Errno::EEXIST) {
|
||||
mv 'tmp/tmpdir', 'tmp/dest2'
|
||||
}
|
||||
mkdir 'tmp/dest2/tmpdir/junk'
|
||||
assert_raises(Errno::EISDIR) {
|
||||
assert_raises(Errno::EEXIST) {
|
||||
mv 'tmp/tmpdir', 'tmp/dest2'
|
||||
}
|
||||
|
||||
|
|
@ -748,17 +748,39 @@ end
|
|||
}
|
||||
end
|
||||
|
||||
if have_file_perm?
|
||||
def test_chmod
|
||||
# FIXME
|
||||
touch 'tmp/a'
|
||||
chmod 0700, 'tmp/a'
|
||||
assert_equal 0700, File.stat('tmp/a').mode & 0777
|
||||
chmod 0500, 'tmp/a'
|
||||
assert_equal 0500, File.stat('tmp/a').mode & 0777
|
||||
end
|
||||
|
||||
def test_chmod_R
|
||||
mkdir_p 'tmp/dir/dir'
|
||||
touch %w( tmp/dir/file tmp/dir/dir/file )
|
||||
chmod_R 0700, 'tmp/dir'
|
||||
assert_equal 0700, File.stat('tmp/dir').mode & 0777
|
||||
assert_equal 0700, File.stat('tmp/dir/file').mode & 0777
|
||||
assert_equal 0700, File.stat('tmp/dir/dir').mode & 0777
|
||||
assert_equal 0700, File.stat('tmp/dir/dir/file').mode & 0777
|
||||
chmod_R 0500, 'tmp/dir'
|
||||
assert_equal 0500, File.stat('tmp/dir').mode & 0777
|
||||
assert_equal 0500, File.stat('tmp/dir/file').mode & 0777
|
||||
assert_equal 0500, File.stat('tmp/dir/dir').mode & 0777
|
||||
assert_equal 0500, File.stat('tmp/dir/dir/file').mode & 0777
|
||||
chmod_R 0700, 'tmp/dir' # to remove
|
||||
end
|
||||
|
||||
# FIXME: How can I test this method?
|
||||
def test_chown
|
||||
# FIXME
|
||||
end
|
||||
|
||||
# FIXME: How can I test this method?
|
||||
def test_chown_R
|
||||
# FIXME
|
||||
end
|
||||
end
|
||||
|
||||
def test_copy_entry
|
||||
each_srcdest do |srcpath, destpath|
|
||||
|
|
@ -767,9 +789,20 @@ end
|
|||
assert_equal File.stat(srcpath).ftype, File.stat(destpath).ftype
|
||||
end
|
||||
if have_symlink?
|
||||
# root is a symlink
|
||||
File.symlink 'somewhere', 'tmp/symsrc'
|
||||
copy_entry 'tmp/symsrc', 'tmp/symdest'
|
||||
assert_equal File.lstat('tmp/symsrc').ftype, File.lstat('tmp/symdest').ftype
|
||||
assert_symlink 'tmp/symdest'
|
||||
assert_equal 'somewhere', File.readlink('tmp/symdest')
|
||||
|
||||
# content is a symlink
|
||||
mkdir 'tmp/dir'
|
||||
File.symlink 'somewhere', 'tmp/dir/sym'
|
||||
copy_entry 'tmp/dir', 'tmp/dirdest'
|
||||
assert_directory 'tmp/dirdest'
|
||||
assert_not_symlink 'tmp/dirdest'
|
||||
assert_symlink 'tmp/dirdest/sym'
|
||||
assert_equal 'somewhere', File.readlink('tmp/dirdest/sym')
|
||||
end
|
||||
end
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue