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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 java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* Utility class for the java side of user specified Keymaster arguments.
* <p>
* Serialization code for this and subclasses must be kept in sync with system/security/keystore
* @hide
*/
public class KeymasterArguments implements Parcelable {
List<KeymasterArgument> mArguments;
public static final Parcelable.Creator<KeymasterArguments> CREATOR = new
Parcelable.Creator<KeymasterArguments>() {
@Override
public KeymasterArguments createFromParcel(Parcel in) {
return new KeymasterArguments(in);
}
@Override
public KeymasterArguments[] newArray(int size) {
return new KeymasterArguments[size];
}
};
public KeymasterArguments() {
mArguments = new ArrayList<KeymasterArgument>();
}
private KeymasterArguments(Parcel in) {
mArguments = in.createTypedArrayList(KeymasterArgument.CREATOR);
}
public void addInt(int tag, int value) {
mArguments.add(new KeymasterIntArgument(tag, value));
}
public void addInts(int tag, int... values) {
for (int value : values) {
addInt(tag, value);
}
}
public void addLongs(int tag, long... values) {
for (long value : values) {
addLong(tag, value);
}
}
public void addBoolean(int tag) {
mArguments.add(new KeymasterBooleanArgument(tag));
}
public void addLong(int tag, long value) {
mArguments.add(new KeymasterLongArgument(tag, value));
}
public void addBlob(int tag, byte[] value) {
mArguments.add(new KeymasterBlobArgument(tag, value));
}
public void addDate(int tag, Date value) {
mArguments.add(new KeymasterDateArgument(tag, value));
}
public void addDateIfNotNull(int tag, Date value) {
if (value != null) {
mArguments.add(new KeymasterDateArgument(tag, value));
}
}
private KeymasterArgument getArgumentByTag(int tag) {
for (KeymasterArgument arg : mArguments) {
if (arg.tag == tag) {
return arg;
}
}
return null;
}
public boolean containsTag(int tag) {
return getArgumentByTag(tag) != null;
}
public int getInt(int tag, int defaultValue) {
switch (KeymasterDefs.getTagType(tag)) {
case KeymasterDefs.KM_ENUM:
case KeymasterDefs.KM_INT:
break; // Accepted types
case KeymasterDefs.KM_INT_REP:
case KeymasterDefs.KM_ENUM_REP:
throw new IllegalArgumentException("Repeatable tags must use getInts: " + tag);
default:
throw new IllegalArgumentException("Tag is not an int type: " + tag);
}
KeymasterArgument arg = getArgumentByTag(tag);
if (arg == null) {
return defaultValue;
}
return ((KeymasterIntArgument) arg).value;
}
public long getLong(int tag, long defaultValue) {
switch (KeymasterDefs.getTagType(tag)) {
case KeymasterDefs.KM_LONG:
break; // Accepted type
case KeymasterDefs.KM_LONG_REP:
throw new IllegalArgumentException("Repeatable tags must use getLongs: " + tag);
default:
throw new IllegalArgumentException("Tag is not a long type: " + tag);
}
KeymasterArgument arg = getArgumentByTag(tag);
if (arg == null) {
return defaultValue;
}
return ((KeymasterLongArgument) arg).value;
}
public Date getDate(int tag, Date defaultValue) {
if (KeymasterDefs.getTagType(tag) != KeymasterDefs.KM_DATE) {
throw new IllegalArgumentException("Tag is not a date type: " + tag);
}
KeymasterArgument arg = getArgumentByTag(tag);
if (arg == null) {
return defaultValue;
}
return ((KeymasterDateArgument) arg).date;
}
public boolean getBoolean(int tag, boolean defaultValue) {
if (KeymasterDefs.getTagType(tag) != KeymasterDefs.KM_BOOL) {
throw new IllegalArgumentException("Tag is not a boolean type: " + tag);
}
KeymasterArgument arg = getArgumentByTag(tag);
if (arg == null) {
return defaultValue;
}
return true;
}
public byte[] getBlob(int tag, byte[] defaultValue) {
switch (KeymasterDefs.getTagType(tag)) {
case KeymasterDefs.KM_BYTES:
case KeymasterDefs.KM_BIGNUM:
break; // Allowed types.
default:
throw new IllegalArgumentException("Tag is not a blob type: " + tag);
}
KeymasterArgument arg = getArgumentByTag(tag);
if (arg == null) {
return defaultValue;
}
return ((KeymasterBlobArgument) arg).blob;
}
public List<Integer> getInts(int tag) {
switch (KeymasterDefs.getTagType(tag)) {
case KeymasterDefs.KM_INT_REP:
case KeymasterDefs.KM_ENUM_REP:
break; // Allowed types.
default:
throw new IllegalArgumentException("Tag is not a repeating type: " + tag);
}
List<Integer> values = new ArrayList<Integer>();
for (KeymasterArgument arg : mArguments) {
if (arg.tag == tag) {
values.add(((KeymasterIntArgument) arg).value);
}
}
return values;
}
public List<Long> getLongs(int tag) {
if (KeymasterDefs.getTagType(tag) != KeymasterDefs.KM_LONG_REP) {
throw new IllegalArgumentException("Tag is not a repeating long: " + tag);
}
List<Long> values = new ArrayList<Long>();
for (KeymasterArgument arg : mArguments) {
if (arg.tag == tag) {
values.add(((KeymasterLongArgument) arg).value);
}
}
return values;
}
public int size() {
return mArguments.size();
}
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeTypedList(mArguments);
}
public void readFromParcel(Parcel in) {
in.readTypedList(mArguments, KeymasterArgument.CREATOR);
}
@Override
public int describeContents() {
return 0;
}
}
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