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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 com.android.internal.widget;
import android.os.Parcel;
import android.os.Parcelable;
import android.service.gatekeeper.GateKeeperResponse;
import android.util.Slog;
/**
* Response object for a ILockSettings credential verification request.
* @hide
*/
public final class VerifyCredentialResponse implements Parcelable {
public static final int RESPONSE_ERROR = -1;
public static final int RESPONSE_OK = 0;
public static final int RESPONSE_RETRY = 1;
public static final VerifyCredentialResponse OK = new VerifyCredentialResponse();
public static final VerifyCredentialResponse ERROR
= new VerifyCredentialResponse(RESPONSE_ERROR, 0, null);
private static final String TAG = "VerifyCredentialResponse";
private int mResponseCode;
private byte[] mPayload;
private int mTimeout;
public static final Parcelable.Creator<VerifyCredentialResponse> CREATOR
= new Parcelable.Creator<VerifyCredentialResponse>() {
@Override
public VerifyCredentialResponse createFromParcel(Parcel source) {
int responseCode = source.readInt();
VerifyCredentialResponse response = new VerifyCredentialResponse(responseCode, 0, null);
if (responseCode == RESPONSE_RETRY) {
response.setTimeout(source.readInt());
} else if (responseCode == RESPONSE_OK) {
int size = source.readInt();
if (size > 0) {
byte[] payload = new byte[size];
source.readByteArray(payload);
response.setPayload(payload);
}
}
return response;
}
@Override
public VerifyCredentialResponse[] newArray(int size) {
return new VerifyCredentialResponse[size];
}
};
public VerifyCredentialResponse() {
mResponseCode = RESPONSE_OK;
mPayload = null;
}
public VerifyCredentialResponse(byte[] payload) {
mPayload = payload;
mResponseCode = RESPONSE_OK;
}
public VerifyCredentialResponse(int timeout) {
mTimeout = timeout;
mResponseCode = RESPONSE_RETRY;
mPayload = null;
}
private VerifyCredentialResponse(int responseCode, int timeout, byte[] payload) {
mResponseCode = responseCode;
mTimeout = timeout;
mPayload = payload;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mResponseCode);
if (mResponseCode == RESPONSE_RETRY) {
dest.writeInt(mTimeout);
} else if (mResponseCode == RESPONSE_OK) {
if (mPayload != null) {
dest.writeInt(mPayload.length);
dest.writeByteArray(mPayload);
} else {
dest.writeInt(0);
}
}
}
@Override
public int describeContents() {
return 0;
}
public byte[] getPayload() {
return mPayload;
}
public int getTimeout() {
return mTimeout;
}
public int getResponseCode() {
return mResponseCode;
}
private void setTimeout(int timeout) {
mTimeout = timeout;
}
private void setPayload(byte[] payload) {
mPayload = payload;
}
public VerifyCredentialResponse stripPayload() {
return new VerifyCredentialResponse(mResponseCode, mTimeout, new byte[0]);
}
public static VerifyCredentialResponse fromGateKeeperResponse(
GateKeeperResponse gateKeeperResponse) {
VerifyCredentialResponse response;
int responseCode = gateKeeperResponse.getResponseCode();
if (responseCode == GateKeeperResponse.RESPONSE_RETRY) {
response = new VerifyCredentialResponse(gateKeeperResponse.getTimeout());
} else if (responseCode == GateKeeperResponse.RESPONSE_OK) {
byte[] token = gateKeeperResponse.getPayload();
if (token == null) {
// something's wrong if there's no payload with a challenge
Slog.e(TAG, "verifyChallenge response had no associated payload");
response = VerifyCredentialResponse.ERROR;
} else {
response = new VerifyCredentialResponse(token);
}
} else {
response = VerifyCredentialResponse.ERROR;
}
return response;
}
}
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