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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed 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 android.security;
import android.annotation.IntDef;
import android.security.keymaster.KeymasterDefs;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* Characteristics of {@code AndroidKeyStore} keys.
*
* @hide
*/
public abstract class KeyStoreKeyCharacteristics {
private KeyStoreKeyCharacteristics() {}
@Retention(RetentionPolicy.SOURCE)
@IntDef({Origin.GENERATED_INSIDE_TEE, Origin.GENERATED_OUTSIDE_OF_TEE, Origin.IMPORTED})
public @interface OriginEnum {}
/**
* Origin of the key.
*/
public static abstract class Origin {
private Origin() {}
/** Key was generated inside a TEE. */
public static final int GENERATED_INSIDE_TEE = 1;
/** Key was generated outside of a TEE. */
public static final int GENERATED_OUTSIDE_OF_TEE = 2;
/** Key was imported. */
public static final int IMPORTED = 0;
/**
* @hide
*/
public static @OriginEnum int fromKeymaster(int origin) {
switch (origin) {
case KeymasterDefs.KM_ORIGIN_HARDWARE:
return GENERATED_INSIDE_TEE;
case KeymasterDefs.KM_ORIGIN_SOFTWARE:
return GENERATED_OUTSIDE_OF_TEE;
case KeymasterDefs.KM_ORIGIN_IMPORTED:
return IMPORTED;
default:
throw new IllegalArgumentException("Unknown origin: " + origin);
}
}
}
}
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