Bring back the ED25519 test

Author: anakinj

test/openssl/test_pkey.rb

@@ -433,6 +433,15 @@ def test_s_from_parameters_dh_with_invalid_parameter
       e = assert_raise(OpenSSL::PKey::PKeyError) { OpenSSL::PKey.from_parameters("DH", invalid: 1234) }
       assert_match(/Invalid parameter "invalid"/, e.message)
     end
+
+    def test_s_from_parameters_ed25519
+      # Ed25519 is not FIPS-approved.
+      omit_on_fips
+
+      key = OpenSSL::PKey.from_parameters("ED25519", pub: "\xD0\x8E\xA8\x96\xB6Fbi{$k\xAC\xB8\xA2V\xF4n\xC3\xD06}R\x8A\xE6I\xA7r\xF6D{W\x84")
+      assert_instance_of OpenSSL::PKey::PKey, key
+      assert_equal "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEA0I6olrZGYml7JGusuKJW9G7D0DZ9UormSady9kR7V4Q=\n-----END PUBLIC KEY-----\n", key.public_to_pem
+    end
   else
     def test_from_parameter_raises_on_pre_3_openssl
       e = assert_raise(OpenSSL::PKey::PKeyError) {