95 lines
3.7 KiB
Java
95 lines
3.7 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.security;
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import android.security.keymaster.KeyCharacteristics;
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import android.security.keymaster.KeymasterDefs;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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/**
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* @hide
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*/
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public abstract class KeymasterUtils {
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private KeymasterUtils() {}
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public static KeymasterException getKeymasterException(int keymasterErrorCode) {
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switch (keymasterErrorCode) {
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case KeymasterDefs.KM_ERROR_INVALID_AUTHORIZATION_TIMEOUT:
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// The name of this parameter significantly differs between Keymaster and framework
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// APIs. Use the framework wording to make life easier for developers.
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return new KeymasterException(keymasterErrorCode,
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"Invalid user authentication validity duration");
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default:
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return new KeymasterException(keymasterErrorCode,
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KeymasterDefs.getErrorMessage(keymasterErrorCode));
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}
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}
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public static CryptoOperationException getCryptoOperationException(KeymasterException e) {
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switch (e.getErrorCode()) {
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case KeymasterDefs.KM_ERROR_KEY_EXPIRED:
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return new KeyExpiredException();
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case KeymasterDefs.KM_ERROR_KEY_NOT_YET_VALID:
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return new KeyNotYetValidException();
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case KeymasterDefs.KM_ERROR_KEY_USER_NOT_AUTHENTICATED:
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return new UserNotAuthenticatedException();
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default:
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return new CryptoOperationException("Crypto operation failed", e);
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}
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}
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public static CryptoOperationException getCryptoOperationException(int keymasterErrorCode) {
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return getCryptoOperationException(getKeymasterException(keymasterErrorCode));
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}
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public static Integer getInt(KeyCharacteristics keyCharacteristics, int tag) {
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if (keyCharacteristics.hwEnforced.containsTag(tag)) {
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return keyCharacteristics.hwEnforced.getInt(tag, -1);
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} else if (keyCharacteristics.swEnforced.containsTag(tag)) {
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return keyCharacteristics.swEnforced.getInt(tag, -1);
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} else {
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return null;
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}
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}
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public static List<Integer> getInts(KeyCharacteristics keyCharacteristics, int tag) {
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List<Integer> result = new ArrayList<Integer>();
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result.addAll(keyCharacteristics.hwEnforced.getInts(tag));
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result.addAll(keyCharacteristics.swEnforced.getInts(tag));
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return result;
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}
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public static Date getDate(KeyCharacteristics keyCharacteristics, int tag) {
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Date result = keyCharacteristics.hwEnforced.getDate(tag, null);
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if (result == null) {
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result = keyCharacteristics.swEnforced.getDate(tag, null);
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}
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return result;
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}
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public static boolean getBoolean(KeyCharacteristics keyCharacteristics, int tag) {
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if (keyCharacteristics.hwEnforced.containsTag(tag)) {
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return keyCharacteristics.hwEnforced.getBoolean(tag, false);
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} else {
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return keyCharacteristics.swEnforced.getBoolean(tag, false);
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}
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}
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}
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