ext/openssl: implement OpenSSL::PKey::{DSA,RSA,EC}#public_pkeytopic/openssl-pkey-ec

Add OpenSSL::PKey::{DSA,RSA,EC}#public_pkey. They return a new instance
of itself, which contains only parameters and public information.

The old methods, {DSA,RSA}#public_key, are now deprecated.

There are 3 types of PKey#public_key: 1) EC#public_key, which returns
the actual public key (EC::Point). 2) RSA/DSA#public_key, which returns
a new instance of PKey with no private information. 3) DH#public_key,
which returns a new instance of DH which contains only DH params. This
doesn't even contain 'private key'. This is very confusing. The new
methods are intend to replace the 2).

1 files changed, 10 insertions, 0 deletions

diff --git a/test/openssl/test_pkey_ec.rb b/test/openssl/test_pkey_ec.rb
index fe128fd455..e5c4056114 100644
--- a/test/openssl/test_pkey_ec.rb
+++ b/test/openssl/test_pkey_ec.rb
@@ -189,6 +189,16 @@ class OpenSSL::TestEC < Test::Unit::TestCase
     assert(pem)
   end
 
+  def test_public_pkey
+    ec = OpenSSL::TestUtils::TEST_KEY_EC_P256V1
+    ec_pub = OpenSSL::PKey::EC.new(ec.group)
+    ec_pub.public_key = ec.public_key
+    test_obj = ec.public_pkey
+    assert(!test_obj.private?)
+    assert(test_obj.public?)
+    assert_equal(ec_pub.to_der, test_obj.to_der)
+  end
+
   def test_ec_point_mul
     ec = OpenSSL::TestUtils::TEST_KEY_EC_P256V1
     p1 = ec.public_key