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/*
* Copyright (C) 2021 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.net.vcn.persistablebundleutils;
import android.annotation.NonNull;
import android.net.ipsec.ike.IkeSessionParams;
import android.net.ipsec.ike.IkeTunnelConnectionParams;
import android.net.ipsec.ike.TunnelModeChildSessionParams;
import android.os.PersistableBundle;
import java.util.Objects;
/**
* Utility class to convert Tunnel Connection Params to/from PersistableBundle
*
* @hide
*/
public final class TunnelConnectionParamsUtils {
private static final int EXPECTED_BUNDLE_KEY_CNT = 1;
private static final String PARAMS_TYPE_IKE = "IKE";
/** Serializes an IkeTunnelConnectionParams to a PersistableBundle. */
@NonNull
public static PersistableBundle toPersistableBundle(@NonNull IkeTunnelConnectionParams params) {
final PersistableBundle result = new PersistableBundle();
result.putPersistableBundle(
PARAMS_TYPE_IKE,
IkeTunnelConnectionParamsUtils.serializeIkeParams(
(IkeTunnelConnectionParams) params));
return result;
}
/** Constructs an IkeTunnelConnectionParams by deserializing a PersistableBundle. */
@NonNull
public static IkeTunnelConnectionParams fromPersistableBundle(@NonNull PersistableBundle in) {
Objects.requireNonNull(in, "PersistableBundle was null");
if (in.keySet().size() != EXPECTED_BUNDLE_KEY_CNT) {
throw new IllegalArgumentException(
String.format(
"Expect PersistableBundle to have %d element but found: %d",
EXPECTED_BUNDLE_KEY_CNT, in.keySet()));
}
if (in.get(PARAMS_TYPE_IKE) != null) {
return IkeTunnelConnectionParamsUtils.deserializeIkeParams(
in.getPersistableBundle(PARAMS_TYPE_IKE));
}
throw new IllegalArgumentException(
"Invalid Tunnel Connection Params type " + in.keySet().iterator().next());
}
private static final class IkeTunnelConnectionParamsUtils {
private static final String IKE_PARAMS_KEY = "IKE_PARAMS_KEY";
private static final String CHILD_PARAMS_KEY = "CHILD_PARAMS_KEY";
@NonNull
public static PersistableBundle serializeIkeParams(
@NonNull IkeTunnelConnectionParams ikeParams) {
final PersistableBundle result = new PersistableBundle();
result.putPersistableBundle(
IKE_PARAMS_KEY,
IkeSessionParamsUtils.toPersistableBundle(ikeParams.getIkeSessionParams()));
result.putPersistableBundle(
CHILD_PARAMS_KEY,
TunnelModeChildSessionParamsUtils.toPersistableBundle(
ikeParams.getTunnelModeChildSessionParams()));
return result;
}
@NonNull
public static IkeTunnelConnectionParams deserializeIkeParams(
@NonNull PersistableBundle in) {
final PersistableBundle ikeBundle = in.getPersistableBundle(IKE_PARAMS_KEY);
final PersistableBundle childBundle = in.getPersistableBundle(CHILD_PARAMS_KEY);
Objects.requireNonNull(ikeBundle, "IkeSessionParams was null");
Objects.requireNonNull(ikeBundle, "TunnelModeChildSessionParams was null");
final IkeSessionParams ikeParams =
IkeSessionParamsUtils.fromPersistableBundle(ikeBundle);
final TunnelModeChildSessionParams childParams =
TunnelModeChildSessionParamsUtils.fromPersistableBundle(childBundle);
return new IkeTunnelConnectionParams(ikeParams, childParams);
}
}
}
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