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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.keymaster;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.ParcelFormatException;
/**
* Base class for the Java side of a Keymaster tagged argument.
* <p>
* Serialization code for this and subclasses must be kept in sync with system/security/keystore
* and with hardware/libhardware/include/hardware/keymaster_defs.h
* @hide
*/
abstract class KeymasterArgument implements Parcelable {
public final int tag;
public static final Parcelable.Creator<KeymasterArgument> CREATOR = new
Parcelable.Creator<KeymasterArgument>() {
@Override
public KeymasterArgument createFromParcel(Parcel in) {
final int pos = in.dataPosition();
final int tag = in.readInt();
switch (KeymasterDefs.getTagType(tag)) {
case KeymasterDefs.KM_ENUM:
case KeymasterDefs.KM_ENUM_REP:
case KeymasterDefs.KM_INT:
case KeymasterDefs.KM_INT_REP:
return new KeymasterIntArgument(tag, in);
case KeymasterDefs.KM_LONG:
case KeymasterDefs.KM_LONG_REP:
return new KeymasterLongArgument(tag, in);
case KeymasterDefs.KM_DATE:
return new KeymasterDateArgument(tag, in);
case KeymasterDefs.KM_BYTES:
case KeymasterDefs.KM_BIGNUM:
return new KeymasterBlobArgument(tag, in);
case KeymasterDefs.KM_BOOL:
return new KeymasterBooleanArgument(tag, in);
default:
throw new ParcelFormatException("Bad tag: " + tag + " at " + pos);
}
}
@Override
public KeymasterArgument[] newArray(int size) {
return new KeymasterArgument[size];
}
};
protected KeymasterArgument(int tag) {
this.tag = tag;
}
/**
* Writes the value of this argument, if any, to the provided parcel.
*/
public abstract void writeValue(Parcel out);
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeInt(tag);
writeValue(out);
}
}
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