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/*
* Copyright (C) 2017 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.keystore;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.os.Parcel;
import android.os.Parcelable;
import com.android.internal.util.Preconditions;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* @deprecated Use {@link android.security.keystore.recovery.KeyDerivationParams}.
* @hide
*/
public final class KeyDerivationParams implements Parcelable {
private final int mAlgorithm;
private byte[] mSalt;
/** @hide */
@Retention(RetentionPolicy.SOURCE)
@IntDef(prefix = {"ALGORITHM_"}, value = {ALGORITHM_SHA256, ALGORITHM_ARGON2ID})
public @interface KeyDerivationAlgorithm {
}
/**
* Salted SHA256
*/
public static final int ALGORITHM_SHA256 = 1;
/**
* Argon2ID
* @hide
*/
// TODO: add Argon2ID support.
public static final int ALGORITHM_ARGON2ID = 2;
/**
* Creates instance of the class to to derive key using salted SHA256 hash.
*/
public static KeyDerivationParams createSha256Params(@NonNull byte[] salt) {
return new KeyDerivationParams(ALGORITHM_SHA256, salt);
}
KeyDerivationParams(@KeyDerivationAlgorithm int algorithm, @NonNull byte[] salt) {
mAlgorithm = algorithm;
mSalt = Preconditions.checkNotNull(salt);
}
/**
* Gets algorithm.
*/
public @KeyDerivationAlgorithm int getAlgorithm() {
return mAlgorithm;
}
/**
* Gets salt.
*/
public @NonNull byte[] getSalt() {
return mSalt;
}
public static final Parcelable.Creator<KeyDerivationParams> CREATOR =
new Parcelable.Creator<KeyDerivationParams>() {
public KeyDerivationParams createFromParcel(Parcel in) {
return new KeyDerivationParams(in);
}
public KeyDerivationParams[] newArray(int length) {
return new KeyDerivationParams[length];
}
};
/**
* @hide
*/
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeInt(mAlgorithm);
out.writeByteArray(mSalt);
}
/**
* @hide
*/
protected KeyDerivationParams(Parcel in) {
mAlgorithm = in.readInt();
mSalt = in.createByteArray();
}
@Override
public int describeContents() {
return 0;
}
}
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