Implement RSAPrivateKey::Copy()

crypto/rsa_private_key_mac.cc

Index: crypto/rsa_private_key_mac.cc
diff --git a/crypto/rsa_private_key_mac.cc b/crypto/rsa_private_key_mac.cc
index 85dadfa9ee67fe4df267514d845a48e2c4f9cd60..b9f0c45f0f2e9ca36422cbef97aa54dd8e0f36c0 100644
--- a/crypto/rsa_private_key_mac.cc
+++ b/crypto/rsa_private_key_mac.cc
@@ -174,13 +174,20 @@ RSAPrivateKey::~RSAPrivateKey() {
   }
 }
 
+RSAPrivateKey* RSAPrivateKey::Copy() const {
+  std::vector<uint8> key_bytes;
+  if (!key_->ExportPrivateKey(&key_bytes))
+    return false;
+  return CreateFromPrivateKeyInfo(key_bytes);
+}
+
 bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) {
   if (!key_.KeyData.Data || !key_.KeyData.Length) {
     return false;
   }
   output->clear();
   output->insert(output->end(), key_.KeyData.Data,
-                key_.KeyData.Data + key_.KeyData.Length);
+                 key_.KeyData.Data + key_.KeyData.Length);
   return true;
 }