[compat] implement X.509 extension valut_der

Author: kares

src/main/java/org/jruby/ext/openssl/X509Extension.java

@@ -796,6 +796,16 @@ public IRubyObject set_critical(final ThreadContext context, IRubyObject arg) {
         return arg;
     }
 
+    @JRubyMethod
+    public RubyString value_der(final ThreadContext context) {
+        try {
+            return StringHelper.newString(context.runtime, getRealValueEncoded());
+        }
+        catch (IOException e) {
+            throw newExtensionError(context.runtime, e);
+        }
+    }
+
     @JRubyMethod
     public RubyString to_der() {
         try {

src/test/ruby/x509/test_x509ext.rb

@@ -107,6 +107,16 @@ def test_to_der # reproducing #389
     assert_equal 'foo', value[1].value
   end
 
+  def test_value_der
+    value = OpenSSL::ASN1::Sequence([OpenSSL::ASN1::Boolean(true)])
+    ext = OpenSSL::X509::Extension.new('basicConstraints', value)
+
+    assert_equal value.to_der, ext.value_der
+    decoded = OpenSSL::ASN1.decode(ext.value_der)
+    assert_equal OpenSSL::ASN1::Sequence, decoded.class
+    assert_equal true, decoded.value.first.value
+  end
+
   def test_to_der_is_the_same_for_non_critical
     ext1 = OpenSSL::X509::Extension.new('1.1.1.1.1.1', 'foo')
     ext2 = OpenSSL::X509::Extension.new('1.1.1.1.1.1', 'foo', false)