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* string.c (rb_memhash): randomize hash to avoid algorithmic

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complexity attacks.
  (rb_str_hash): use rb_memhash.

* include/ruby/intern.h (rb_reset_random_seed): declared.

* thread.c (rb_thread_atfork): call rb_reset_random_seed.

* inits.c (rb_call_inits): call Init_RandomSeed at first.

* random.c (seed_initialized): defined.
  (fill_random_seed): extracted from random_seed.
  (make_seed_value): extracted from random_seed.
  (rb_f_rand): initialize random seed at first.
  (initial_seed): defined.
  (Init_RandomSeed): defined.
  (Init_RandomSeed2): defined.
  (rb_reset_random_seed): defined.
  (Init_Random): call Init_RandomSeed2.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@17465 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2008-06-20 02:46:17 +00:00
parent 3af6dda231
commit 04739ba617
7 changed files with 107 additions and 18 deletions
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11
test/ruby/test_string.rb
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@ -683,6 +683,17 @@ class TestString < Test::Unit::TestCase
assert(S("hello").hash != S("helLO").hash)
end
def test_hash_random
str = 'abc'
a = [str.hash.to_s]
3.times {
EnvUtil.rubyexec("-e", "print #{str.dump}.hash") {|i,o,e|
a << o.read
}
}
assert_not_equal([str.hash.to_s], a.uniq)
end
def test_hex
assert_equal(255, S("0xff").hex)
assert_equal(-255, S("-0xff").hex)