* ext/openssl/ossl_cipher.c: remove the encryption key initialization

from Cipher#initialize. This is effectively a revert of r32723
  ("Avoid possible SEGV from AES encryption/decryption", 2011-07-28).
  the patch is derived from 8108e0a6db,
  written by Kazuki Yamaguchi.
  [Backport #8221]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@59267 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/openssl/test_cipher.rb

@@ -81,6 +81,7 @@ class OpenSSL::TestCipher < Test::Unit::TestCase
 
   def test_empty_data
     @c1.encrypt
+    @c1.random_key
     assert_raise(ArgumentError){ @c1.update("") }
   end
 
@@ -129,12 +130,10 @@ class OpenSSL::TestCipher < Test::Unit::TestCase
       }
     end
 
-    def test_AES_crush
-      500.times do
-        assert_nothing_raised("[Bug #2768]") do
-          # it caused OpenSSL SEGV by uninitialized key
-          OpenSSL::Cipher::AES128.new("ECB").update "." * 17
-        end
+    def test_update_raise_if_key_not_set
+      assert_raise(OpenSSL::Cipher::CipherError) do
+        # it caused OpenSSL SEGV by uninitialized key [Bug #2768]
+        OpenSSL::Cipher::AES128.new("ECB").update "." * 17
       end
     end
   end
@@ -236,6 +235,24 @@ class OpenSSL::TestCipher < Test::Unit::TestCase
       end
     end
 
+    def test_aes_gcm_key_iv_order_issue
+      pt = "[ruby/openssl#49]"
+      cipher = OpenSSL::Cipher.new("aes-128-gcm").encrypt
+      cipher.key = "x" * 16
+      cipher.iv = "a" * 12
+      ct1 = cipher.update(pt) << cipher.final
+      tag1 = cipher.auth_tag
+
+      cipher = OpenSSL::Cipher.new("aes-128-gcm").encrypt
+      cipher.iv = "a" * 12
+      cipher.key = "x" * 16
+      ct2 = cipher.update(pt) << cipher.final
+      tag2 = cipher.auth_tag
+
+      assert_equal ct1, ct2
+      assert_equal tag1, tag2
+    end if has_cipher?("aes-128-gcm")
+
   end
 
   private