Snapshot f14b9f173b2bf3184f33acd17d484cac288eb282
diff --git a/luni/src/main/java/java/security/KeyFactorySpi.java b/luni/src/main/java/java/security/KeyFactorySpi.java
new file mode 100644
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+++ b/luni/src/main/java/java/security/KeyFactorySpi.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package java.security;
+
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+
+/**
+ * {@code KeyFactorySpi} is the Service Provider Interface (SPI) definition for
+ * {@link KeyFactory}.
+ *
+ * @see KeyFactory
+ */
+public abstract class KeyFactorySpi {
+
+ /**
+ * Generates a instance of {@code PublicKey} from the given key
+ * specification.
+ *
+ * @param keySpec
+ * the specification of the public key.
+ * @return the public key.
+ * @throws InvalidKeySpecException
+ * if the specified {@code keySpec} is invalid.
+ */
+ protected abstract PublicKey engineGeneratePublic(KeySpec keySpec)
+ throws InvalidKeySpecException;
+
+ /**
+ * Generates a instance of {@code PrivateKey} from the given key
+ * specification.
+ *
+ * @param keySpec
+ * the specification of the private key.
+ * @return the private key.
+ * @throws InvalidKeySpecException
+ * if the specified {@code keySpec} is invalid.
+ */
+ protected abstract PrivateKey engineGeneratePrivate(KeySpec keySpec)
+ throws InvalidKeySpecException;
+
+ /**
+ * Returns the key specification for the specified key.
+ *
+ * @param key
+ * the key from which the specification is requested.
+ * @param keySpec
+ * the type of the requested {@code KeySpec}.
+ * @return the key specification for the specified key.
+ * @throws InvalidKeySpecException
+ * if the key can not be processed, or the requested requested
+ * {@code KeySpec} is inappropriate for the given key.
+ */
+ protected abstract <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec)
+ throws InvalidKeySpecException;
+ //FIXME 1.5 signature: protected abstract <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec) throws InvalidKeySpecException
+
+ /**
+ * Translates the given key into a key from this key factory.
+ *
+ * @param key
+ * the key to translate.
+ * @return the translated key.
+ * @throws InvalidKeyException
+ * if the specified key can not be translated by this key
+ * factory.
+ */
+ protected abstract Key engineTranslateKey(Key key) throws InvalidKeyException;
+
+}