Merge pull request ruby#674 from rhenium/ky/ssl-update-default-dh-params

ssl: use ffdhe2048 from RFC 7919 as the default DH group parameters

Author: rhenium

lib/openssl/ssl.rb

@@ -34,21 +34,21 @@ class SSLContext
       }
 
       if defined?(OpenSSL::PKey::DH)
-        DEFAULT_2048 = OpenSSL::PKey::DH.new <<-_end_of_pem_
+        DH_ffdhe2048 = OpenSSL::PKey::DH.new <<-_end_of_pem_
 -----BEGIN DH PARAMETERS-----
-MIIBCAKCAQEA7E6kBrYiyvmKAMzQ7i8WvwVk9Y/+f8S7sCTN712KkK3cqd1jhJDY
-JbrYeNV3kUIKhPxWHhObHKpD1R84UpL+s2b55+iMd6GmL7OYmNIT/FccKhTcveab
-VBmZT86BZKYyf45hUF9FOuUM9xPzuK3Vd8oJQvfYMCd7LPC0taAEljQLR4Edf8E6
-YoaOffgTf5qxiwkjnlVZQc3whgnEt9FpVMvQ9eknyeGB5KHfayAc3+hUAvI3/Cr3
-1bNveX5wInh5GDx1FGhKBZ+s1H+aedudCm7sCgRwv8lKWYGiHzObSma8A86KG+MD
-7Lo5JquQ3DlBodj3IDyPrxIv96lvRPFtAwIBAg==
+MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
++8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
+87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
+YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
+7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
+ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
 -----END DH PARAMETERS-----
         _end_of_pem_
-        private_constant :DEFAULT_2048
+        private_constant :DH_ffdhe2048
 
         DEFAULT_TMP_DH_CALLBACK = lambda { |ctx, is_export, keylen| # :nodoc:
           warn "using default DH parameters." if $VERBOSE
-          DEFAULT_2048
+          DH_ffdhe2048
         }
       end